diff options
Diffstat (limited to 'src/aig')
156 files changed, 73355 insertions, 0 deletions
diff --git a/src/aig/aig/aig.h b/src/aig/aig/aig.h new file mode 100644 index 00000000..096e04e7 --- /dev/null +++ b/src/aig/aig/aig.h @@ -0,0 +1,554 @@ +/**CFile**************************************************************** + + FileName [aig.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aig.h,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __AIG_H__ +#define __AIG_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +#include "vec.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Aig_Man_t_ Aig_Man_t; +typedef struct Aig_Obj_t_ Aig_Obj_t; +typedef struct Aig_MmFixed_t_ Aig_MmFixed_t; +typedef struct Aig_MmFlex_t_ Aig_MmFlex_t; +typedef struct Aig_MmStep_t_ Aig_MmStep_t; +typedef struct Aig_TMan_t_ Aig_TMan_t; + +// object types +typedef enum { + AIG_OBJ_NONE, // 0: non-existent object + AIG_OBJ_CONST1, // 1: constant 1 + AIG_OBJ_PI, // 2: primary input + AIG_OBJ_PO, // 3: primary output + AIG_OBJ_BUF, // 4: buffer node + AIG_OBJ_AND, // 5: AND node + AIG_OBJ_EXOR, // 6: EXOR node + AIG_OBJ_LATCH, // 7: latch + AIG_OBJ_VOID // 8: unused object +} Aig_Type_t; + +// the AIG node +struct Aig_Obj_t_ // 8 words +{ + Aig_Obj_t * pNext; // strashing table + Aig_Obj_t * pFanin0; // fanin + Aig_Obj_t * pFanin1; // fanin + unsigned int Type : 3; // object type + unsigned int fPhase : 1; // value under 000...0 pattern + unsigned int fMarkA : 1; // multipurpose mask + unsigned int fMarkB : 1; // multipurpose mask + unsigned int nRefs : 26; // reference count + unsigned Level : 24; // the level of this node + unsigned nCuts : 8; // the number of cuts + int TravId; // unique ID of last traversal involving the node + int Id; // unique ID of the node + union { // temporary store for user's data + void * pData; + int iData; + float dData; + }; +}; + +// the AIG manager +struct Aig_Man_t_ +{ + char * pName; // the design name + // AIG nodes + Vec_Ptr_t * vPis; // the array of PIs + Vec_Ptr_t * vPos; // the array of POs + Vec_Ptr_t * vObjs; // the array of all nodes (optional) + Vec_Ptr_t * vBufs; // the array of buffers + Aig_Obj_t * pConst1; // the constant 1 node + Aig_Obj_t Ghost; // the ghost node + int nRegs; // the number of registers (registers are last POs) + int nAsserts; // the number of asserts among POs (asserts are first POs) + // AIG node counters + int nObjs[AIG_OBJ_VOID];// the number of objects by type + int nCreated; // the number of created objects + int nDeleted; // the number of deleted objects + // structural hash table + Aig_Obj_t ** pTable; // structural hash table + int nTableSize; // structural hash table size + // representation of fanouts + int * pFanData; // the database to store fanout information + int nFansAlloc; // the size of fanout representation + Vec_Vec_t * vLevels; // used to update timing information + int nBufReplaces; // the number of times replacement led to a buffer + int nBufFixes; // the number of times buffers were propagated + int nBufMax; // the maximum number of buffers during computation + // topological order + unsigned * pOrderData; + int nOrderAlloc; + int iPrev; + int iNext; + int nAndTotal; + int nAndPrev; + // representatives + Aig_Obj_t ** pEquivs; // linked list of equivalent nodes (when choices are used) + Aig_Obj_t ** pReprs; // representatives of each node + int nReprsAlloc; // the number of allocated representatives + // various data members + Aig_MmFixed_t * pMemObjs; // memory manager for objects + Vec_Int_t * vLevelR; // the reverse level of the nodes + int nLevelMax; // maximum number of levels + void * pData; // the temporary data + int nTravIds; // the current traversal ID + int fCatchExor; // enables EXOR nodes + int fAddStrash; // performs additional strashing + Aig_Obj_t ** pObjCopies; // mapping of AIG nodes into FRAIG nodes + void (*pImpFunc) (void*, void*); // implication checking precedure + void * pImpData; // implication checking data + Aig_TMan_t * pManTime; // the timing manager + Vec_Ptr_t * vMapped; + Vec_Int_t * vFlopNums; + // timing statistics + int time1; + int time2; +}; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +#define AIG_MIN(a,b) (((a) < (b))? (a) : (b)) +#define AIG_MAX(a,b) (((a) > (b))? (a) : (b)) +#define AIG_ABS(a) (((a) >= 0)? (a) :-(a)) +#define AIG_INFINITY (100000000) + +#ifndef PRT +#define PRT(a,t) printf("%s = ", (a)); printf("%6.2f sec\n", (float)(t)/(float)(CLOCKS_PER_SEC)) +#endif + +static inline int Aig_Base2Log( unsigned n ) { int r; assert( n >= 0 ); if ( n < 2 ) return n; for ( r = 0, n--; n; n >>= 1, r++ ); return r; } +static inline int Aig_Base10Log( unsigned n ) { int r; assert( n >= 0 ); if ( n < 2 ) return n; for ( r = 0, n--; n; n /= 10, r++ ); return r; } +static inline char * Aig_UtilStrsav( char * s ) { return s ? strcpy(ALLOC(char, strlen(s)+1), s) : NULL; } +static inline int Aig_BitWordNum( int nBits ) { return (nBits>>5) + ((nBits&31) > 0); } +static inline int Aig_TruthWordNum( int nVars ) { return nVars <= 5 ? 1 : (1 << (nVars - 5)); } +static inline int Aig_InfoHasBit( unsigned * p, int i ) { return (p[(i)>>5] & (1<<((i) & 31))) > 0; } +static inline void Aig_InfoSetBit( unsigned * p, int i ) { p[(i)>>5] |= (1<<((i) & 31)); } +static inline void Aig_InfoXorBit( unsigned * p, int i ) { p[(i)>>5] ^= (1<<((i) & 31)); } +static inline unsigned Aig_InfoMask( int nVar ) { return (~(unsigned)0) >> (32-nVar); } +static inline unsigned Aig_ObjCutSign( unsigned ObjId ) { return (1 << (ObjId & 31)); } +static inline int Aig_WordCountOnes( unsigned uWord ) +{ + uWord = (uWord & 0x55555555) + ((uWord>>1) & 0x55555555); + uWord = (uWord & 0x33333333) + ((uWord>>2) & 0x33333333); + uWord = (uWord & 0x0F0F0F0F) + ((uWord>>4) & 0x0F0F0F0F); + uWord = (uWord & 0x00FF00FF) + ((uWord>>8) & 0x00FF00FF); + return (uWord & 0x0000FFFF) + (uWord>>16); +} + +static inline Aig_Obj_t * Aig_Regular( Aig_Obj_t * p ) { return (Aig_Obj_t *)((unsigned long)(p) & ~01); } +static inline Aig_Obj_t * Aig_Not( Aig_Obj_t * p ) { return (Aig_Obj_t *)((unsigned long)(p) ^ 01); } +static inline Aig_Obj_t * Aig_NotCond( Aig_Obj_t * p, int c ) { return (Aig_Obj_t *)((unsigned long)(p) ^ (c)); } +static inline int Aig_IsComplement( Aig_Obj_t * p ) { return (int)((unsigned long)(p) & 01); } + +static inline int Aig_ManPiNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_PI]; } +static inline int Aig_ManPoNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_PO]; } +static inline int Aig_ManBufNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_BUF]; } +static inline int Aig_ManAndNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_AND]; } +static inline int Aig_ManExorNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_EXOR]; } +static inline int Aig_ManLatchNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_LATCH]; } +static inline int Aig_ManNodeNum( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_AND]+p->nObjs[AIG_OBJ_EXOR]; } +static inline int Aig_ManGetCost( Aig_Man_t * p ) { return p->nObjs[AIG_OBJ_AND]+3*p->nObjs[AIG_OBJ_EXOR]; } +static inline int Aig_ManObjNum( Aig_Man_t * p ) { return p->nCreated - p->nDeleted; } +static inline int Aig_ManObjNumMax( Aig_Man_t * p ) { return Vec_PtrSize(p->vObjs); } +static inline int Aig_ManRegNum( Aig_Man_t * p ) { return p->nRegs; } + +static inline Aig_Obj_t * Aig_ManConst0( Aig_Man_t * p ) { return Aig_Not(p->pConst1); } +static inline Aig_Obj_t * Aig_ManConst1( Aig_Man_t * p ) { return p->pConst1; } +static inline Aig_Obj_t * Aig_ManGhost( Aig_Man_t * p ) { return &p->Ghost; } +static inline Aig_Obj_t * Aig_ManPi( Aig_Man_t * p, int i ) { return (Aig_Obj_t *)Vec_PtrEntry(p->vPis, i); } +static inline Aig_Obj_t * Aig_ManPo( Aig_Man_t * p, int i ) { return (Aig_Obj_t *)Vec_PtrEntry(p->vPos, i); } +static inline Aig_Obj_t * Aig_ManLo( Aig_Man_t * p, int i ) { return (Aig_Obj_t *)Vec_PtrEntry(p->vPis, Aig_ManPiNum(p)-Aig_ManRegNum(p)+i); } +static inline Aig_Obj_t * Aig_ManLi( Aig_Man_t * p, int i ) { return (Aig_Obj_t *)Vec_PtrEntry(p->vPos, Aig_ManPoNum(p)-Aig_ManRegNum(p)+i); } +static inline Aig_Obj_t * Aig_ManObj( Aig_Man_t * p, int i ) { return p->vObjs ? (Aig_Obj_t *)Vec_PtrEntry(p->vObjs, i) : NULL; } + +static inline Aig_Type_t Aig_ObjType( Aig_Obj_t * pObj ) { return (Aig_Type_t)pObj->Type; } +static inline int Aig_ObjIsNone( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_NONE; } +static inline int Aig_ObjIsConst1( Aig_Obj_t * pObj ) { assert(!Aig_IsComplement(pObj)); return pObj->Type == AIG_OBJ_CONST1; } +static inline int Aig_ObjIsPi( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_PI; } +static inline int Aig_ObjIsPo( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_PO; } +static inline int Aig_ObjIsBuf( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_BUF; } +static inline int Aig_ObjIsAnd( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_AND; } +static inline int Aig_ObjIsExor( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_EXOR; } +static inline int Aig_ObjIsLatch( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_LATCH; } +static inline int Aig_ObjIsNode( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_AND || pObj->Type == AIG_OBJ_EXOR; } +static inline int Aig_ObjIsTerm( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_PI || pObj->Type == AIG_OBJ_PO || pObj->Type == AIG_OBJ_CONST1; } +static inline int Aig_ObjIsHash( Aig_Obj_t * pObj ) { return pObj->Type == AIG_OBJ_AND || pObj->Type == AIG_OBJ_EXOR || pObj->Type == AIG_OBJ_LATCH; } +static inline int Aig_ObjIsChoice( Aig_Man_t * p, Aig_Obj_t * pObj ) { return p->pEquivs && p->pEquivs[pObj->Id] && pObj->nRefs > 0; } + +static inline int Aig_ObjIsMarkA( Aig_Obj_t * pObj ) { return pObj->fMarkA; } +static inline void Aig_ObjSetMarkA( Aig_Obj_t * pObj ) { pObj->fMarkA = 1; } +static inline void Aig_ObjClearMarkA( Aig_Obj_t * pObj ) { pObj->fMarkA = 0; } + +static inline void Aig_ObjSetTravId( Aig_Obj_t * pObj, int TravId ) { pObj->TravId = TravId; } +static inline void Aig_ObjSetTravIdCurrent( Aig_Man_t * p, Aig_Obj_t * pObj ) { pObj->TravId = p->nTravIds; } +static inline void Aig_ObjSetTravIdPrevious( Aig_Man_t * p, Aig_Obj_t * pObj ) { pObj->TravId = p->nTravIds - 1; } +static inline int Aig_ObjIsTravIdCurrent( Aig_Man_t * p, Aig_Obj_t * pObj ) { return (int)(pObj->TravId == p->nTravIds); } +static inline int Aig_ObjIsTravIdPrevious( Aig_Man_t * p, Aig_Obj_t * pObj ) { return (int)(pObj->TravId == p->nTravIds - 1); } + +static inline int Aig_ObjPhase( Aig_Obj_t * pObj ) { return pObj->fPhase; } +static inline int Aig_ObjPhaseReal( Aig_Obj_t * pObj ) { return pObj? Aig_Regular(pObj)->fPhase ^ Aig_IsComplement(pObj) : 1; } +static inline int Aig_ObjRefs( Aig_Obj_t * pObj ) { return pObj->nRefs; } +static inline void Aig_ObjRef( Aig_Obj_t * pObj ) { pObj->nRefs++; } +static inline void Aig_ObjDeref( Aig_Obj_t * pObj ) { assert( pObj->nRefs > 0 ); pObj->nRefs--; } +static inline void Aig_ObjClearRef( Aig_Obj_t * pObj ) { pObj->nRefs = 0; } +static inline int Aig_ObjFaninId0( Aig_Obj_t * pObj ) { return pObj->pFanin0? Aig_Regular(pObj->pFanin0)->Id : -1; } +static inline int Aig_ObjFaninId1( Aig_Obj_t * pObj ) { return pObj->pFanin1? Aig_Regular(pObj->pFanin1)->Id : -1; } +static inline int Aig_ObjFaninC0( Aig_Obj_t * pObj ) { return Aig_IsComplement(pObj->pFanin0); } +static inline int Aig_ObjFaninC1( Aig_Obj_t * pObj ) { return Aig_IsComplement(pObj->pFanin1); } +static inline Aig_Obj_t * Aig_ObjFanin0( Aig_Obj_t * pObj ) { return Aig_Regular(pObj->pFanin0); } +static inline Aig_Obj_t * Aig_ObjFanin1( Aig_Obj_t * pObj ) { return Aig_Regular(pObj->pFanin1); } +static inline Aig_Obj_t * Aig_ObjChild0( Aig_Obj_t * pObj ) { return pObj->pFanin0; } +static inline Aig_Obj_t * Aig_ObjChild1( Aig_Obj_t * pObj ) { return pObj->pFanin1; } +static inline Aig_Obj_t * Aig_ObjChild0Copy( Aig_Obj_t * pObj ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin0(pObj)? Aig_NotCond((Aig_Obj_t *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj)) : NULL; } +static inline Aig_Obj_t * Aig_ObjChild1Copy( Aig_Obj_t * pObj ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin1(pObj)? Aig_NotCond((Aig_Obj_t *)Aig_ObjFanin1(pObj)->pData, Aig_ObjFaninC1(pObj)) : NULL; } +static inline int Aig_ObjLevel( Aig_Obj_t * pObj ) { return pObj->Level; } +static inline int Aig_ObjLevelNew( Aig_Obj_t * pObj ) { return Aig_ObjFanin1(pObj)? 1 + Aig_ObjIsExor(pObj) + AIG_MAX(Aig_ObjFanin0(pObj)->Level, Aig_ObjFanin1(pObj)->Level) : Aig_ObjFanin0(pObj)->Level; } +static inline void Aig_ObjClean( Aig_Obj_t * pObj ) { memset( pObj, 0, sizeof(Aig_Obj_t) ); } +static inline Aig_Obj_t * Aig_ObjFanout0( Aig_Man_t * p, Aig_Obj_t * pObj ) { assert(p->pFanData && pObj->Id < p->nFansAlloc); return Aig_ManObj(p, p->pFanData[5*pObj->Id] >> 1); } +static inline Aig_Obj_t * Aig_ObjEquiv( Aig_Man_t * p, Aig_Obj_t * pObj ) { return p->pEquivs? p->pEquivs[pObj->Id] : NULL; } +static inline int Aig_ObjWhatFanin( Aig_Obj_t * pObj, Aig_Obj_t * pFanin ) +{ + if ( Aig_ObjFanin0(pObj) == pFanin ) return 0; + if ( Aig_ObjFanin1(pObj) == pFanin ) return 1; + assert(0); return -1; +} +static inline int Aig_ObjFanoutC( Aig_Obj_t * pObj, Aig_Obj_t * pFanout ) +{ + if ( Aig_ObjFanin0(pFanout) == pObj ) return Aig_ObjFaninC0(pObj); + if ( Aig_ObjFanin1(pFanout) == pObj ) return Aig_ObjFaninC1(pObj); + assert(0); return -1; +} + +// create the ghost of the new node +static inline Aig_Obj_t * Aig_ObjCreateGhost( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1, Aig_Type_t Type ) +{ + Aig_Obj_t * pGhost; + assert( Type != AIG_OBJ_AND || !Aig_ObjIsConst1(Aig_Regular(p0)) ); + assert( p1 == NULL || !Aig_ObjIsConst1(Aig_Regular(p1)) ); + assert( Type == AIG_OBJ_PI || Aig_Regular(p0) != Aig_Regular(p1) ); + pGhost = Aig_ManGhost(p); + pGhost->Type = Type; + if ( p1 == NULL || Aig_Regular(p0)->Id < Aig_Regular(p1)->Id ) + { + pGhost->pFanin0 = p0; + pGhost->pFanin1 = p1; + } + else + { + pGhost->pFanin0 = p1; + pGhost->pFanin1 = p0; + } + return pGhost; +} + +// internal memory manager +static inline Aig_Obj_t * Aig_ManFetchMemory( Aig_Man_t * p ) +{ + extern char * Aig_MmFixedEntryFetch( Aig_MmFixed_t * p ); + Aig_Obj_t * pTemp; + pTemp = (Aig_Obj_t *)Aig_MmFixedEntryFetch( p->pMemObjs ); + memset( pTemp, 0, sizeof(Aig_Obj_t) ); + Vec_PtrPush( p->vObjs, pTemp ); + pTemp->Id = p->nCreated++; + return pTemp; +} +static inline void Aig_ManRecycleMemory( Aig_Man_t * p, Aig_Obj_t * pEntry ) +{ + extern void Aig_MmFixedEntryRecycle( Aig_MmFixed_t * p, char * pEntry ); + assert( pEntry->nRefs == 0 ); + pEntry->Type = AIG_OBJ_NONE; // distinquishes a dead node from a live node + Aig_MmFixedEntryRecycle( p->pMemObjs, (char *)pEntry ); + p->nDeleted++; +} + + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over the primary inputs +#define Aig_ManForEachPi( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPis, pObj, i ) +// iterator over the primary outputs +#define Aig_ManForEachPo( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPos, pObj, i ) +// iterator over the assertions +#define Aig_ManForEachAssert( p, pObj, i ) \ + Vec_PtrForEachEntryStart( p->vPos, pObj, i, Aig_ManPoNum(p)-p->nAsserts ) +// iterator over all objects, including those currently not used +#define Aig_ManForEachObj( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vObjs, pObj, i ) if ( (pObj) == NULL ) {} else +// iterator over all nodes +#define Aig_ManForEachNode( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vObjs, pObj, i ) if ( (pObj) == NULL || !Aig_ObjIsNode(pObj) ) {} else +// iterator over the nodes whose IDs are stored in the array +#define Aig_ManForEachNodeVec( p, vIds, pObj, i ) \ + for ( i = 0; i < Vec_IntSize(vIds) && ((pObj) = Aig_ManObj(p, Vec_IntEntry(vIds,i))); i++ ) +// iterator over the nodes in the topological order +#define Aig_ManForEachNodeInOrder( p, pObj ) \ + for ( assert(p->pOrderData), p->iPrev = 0, p->iNext = p->pOrderData[1]; \ + p->iNext && (((pObj) = Aig_ManObj(p, p->iNext)), 1); \ + p->iNext = p->pOrderData[2*p->iPrev+1] ) + +// these two procedures are only here for the use inside the iterator +static inline int Aig_ObjFanout0Int( Aig_Man_t * p, int ObjId ) { assert(ObjId < p->nFansAlloc); return p->pFanData[5*ObjId]; } +static inline int Aig_ObjFanoutNext( Aig_Man_t * p, int iFan ) { assert(iFan/2 < p->nFansAlloc); return p->pFanData[5*(iFan >> 1) + 3 + (iFan & 1)]; } +// iterator over the fanouts +#define Aig_ObjForEachFanout( p, pObj, pFanout, iFan, i ) \ + for ( assert(p->pFanData), i = 0; (i < (int)(pObj)->nRefs) && \ + (((iFan) = i? Aig_ObjFanoutNext(p, iFan) : Aig_ObjFanout0Int(p, pObj->Id)), 1) && \ + (((pFanout) = Aig_ManObj(p, iFan>>1)), 1); i++ ) + + +//////////////////////////////////////////////////////////////////////// +/// SEQUENTIAL ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over the primary inputs +#define Aig_ManForEachPiSeq( p, pObj, i ) \ + Vec_PtrForEachEntryStop( p->vPis, pObj, i, Aig_ManPiNum(p)-Aig_ManRegNum(p) ) +// iterator over the latch outputs +#define Aig_ManForEachLoSeq( p, pObj, i ) \ + Vec_PtrForEachEntryStart( p->vPis, pObj, i, Aig_ManPiNum(p)-Aig_ManRegNum(p) ) +// iterator over the primary outputs +#define Aig_ManForEachPoSeq( p, pObj, i ) \ + Vec_PtrForEachEntryStop( p->vPos, pObj, i, Aig_ManPoNum(p)-Aig_ManRegNum(p) ) +// iterator over the latch inputs +#define Aig_ManForEachLiSeq( p, pObj, i ) \ + Vec_PtrForEachEntryStart( p->vPos, pObj, i, Aig_ManPoNum(p)-Aig_ManRegNum(p) ) +// iterator over the latch input and outputs +#define Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, k ) \ + for ( k = 0; (k < Aig_ManRegNum(p)) && (((pObjLi) = Aig_ManLi(p, k)), 1) \ + && (((pObjLo)=Aig_ManLo(p, k)), 1); k++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== aigCheck.c ========================================================*/ +extern int Aig_ManCheck( Aig_Man_t * p ); +extern void Aig_ManCheckMarkA( Aig_Man_t * p ); +extern void Aig_ManCheckPhase( Aig_Man_t * p ); +/*=== aigDfs.c ==========================================================*/ +extern Vec_Ptr_t * Aig_ManDfs( Aig_Man_t * p ); +extern Vec_Ptr_t * Aig_ManDfsNodes( Aig_Man_t * p, Aig_Obj_t ** ppNodes, int nNodes ); +extern Vec_Ptr_t * Aig_ManDfsChoices( Aig_Man_t * p ); +extern Vec_Ptr_t * Aig_ManDfsReverse( Aig_Man_t * p ); +extern int Aig_ManLevelNum( Aig_Man_t * p ); +extern int Aig_ManCountLevels( Aig_Man_t * p ); +extern int Aig_DagSize( Aig_Obj_t * pObj ); +extern int Aig_SupportSize( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern void Aig_ConeUnmark_rec( Aig_Obj_t * pObj ); +extern Aig_Obj_t * Aig_Transfer( Aig_Man_t * pSour, Aig_Man_t * pDest, Aig_Obj_t * pObj, int nVars ); +extern Aig_Obj_t * Aig_Compose( Aig_Man_t * p, Aig_Obj_t * pRoot, Aig_Obj_t * pFunc, int iVar ); +extern void Aig_ObjCollectCut( Aig_Obj_t * pRoot, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vNodes ); +extern int Aig_ObjCollectSuper( Aig_Obj_t * pObj, Vec_Ptr_t * vSuper ); +/*=== aigFanout.c ==========================================================*/ +extern void Aig_ObjAddFanout( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFanout ); +extern void Aig_ObjRemoveFanout( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFanout ); +extern void Aig_ManFanoutStart( Aig_Man_t * p ); +extern void Aig_ManFanoutStop( Aig_Man_t * p ); +/*=== aigMan.c ==========================================================*/ +extern Aig_Man_t * Aig_ManStart( int nNodesMax ); +extern Aig_Man_t * Aig_ManStartFrom( Aig_Man_t * p ); +extern Aig_Obj_t * Aig_ManDup_rec( Aig_Man_t * pNew, Aig_Man_t * p, Aig_Obj_t * pObj ); +extern Aig_Man_t * Aig_ManDup( Aig_Man_t * p, int fOrdered ); +extern Aig_Man_t * Aig_ManExtractMiter( Aig_Man_t * p, Aig_Obj_t * pNode1, Aig_Obj_t * pNode2 ); +extern void Aig_ManStop( Aig_Man_t * p ); +extern int Aig_ManCleanup( Aig_Man_t * p ); +extern void Aig_ManPrintStats( Aig_Man_t * p ); +/*=== aigMem.c ==========================================================*/ +extern void Aig_ManStartMemory( Aig_Man_t * p ); +extern void Aig_ManStopMemory( Aig_Man_t * p ); +/*=== aigMffc.c ==========================================================*/ +extern int Aig_NodeRef_rec( Aig_Obj_t * pNode, unsigned LevelMin ); +extern int Aig_NodeDeref_rec( Aig_Obj_t * pNode, unsigned LevelMin ); +extern int Aig_NodeMffsSupp( Aig_Man_t * p, Aig_Obj_t * pNode, int LevelMin, Vec_Ptr_t * vSupp ); +extern int Aig_NodeMffsLabel( Aig_Man_t * p, Aig_Obj_t * pNode ); +extern int Aig_NodeMffsLabelCut( Aig_Man_t * p, Aig_Obj_t * pNode, Vec_Ptr_t * vLeaves ); +extern int Aig_NodeMffsExtendCut( Aig_Man_t * p, Aig_Obj_t * pNode, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vResult ); +/*=== aigObj.c ==========================================================*/ +extern Aig_Obj_t * Aig_ObjCreatePi( Aig_Man_t * p ); +extern Aig_Obj_t * Aig_ObjCreatePo( Aig_Man_t * p, Aig_Obj_t * pDriver ); +extern Aig_Obj_t * Aig_ObjCreate( Aig_Man_t * p, Aig_Obj_t * pGhost ); +extern void Aig_ObjConnect( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFan0, Aig_Obj_t * pFan1 ); +extern void Aig_ObjDisconnect( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern void Aig_ObjDelete( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern void Aig_ObjDelete_rec( Aig_Man_t * p, Aig_Obj_t * pObj, int fFreeTop ); +extern void Aig_ObjPatchFanin0( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFaninNew ); +extern void Aig_ObjReplace( Aig_Man_t * p, Aig_Obj_t * pObjOld, Aig_Obj_t * pObjNew, int fNodesOnly, int fUpdateLevel ); +/*=== aigOper.c =========================================================*/ +extern Aig_Obj_t * Aig_IthVar( Aig_Man_t * p, int i ); +extern Aig_Obj_t * Aig_Oper( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1, Aig_Type_t Type ); +extern Aig_Obj_t * Aig_And( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1 ); +extern Aig_Obj_t * Aig_Latch( Aig_Man_t * p, Aig_Obj_t * pObj, int fInitOne ); +extern Aig_Obj_t * Aig_Or( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1 ); +extern Aig_Obj_t * Aig_Exor( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1 ); +extern Aig_Obj_t * Aig_Mux( Aig_Man_t * p, Aig_Obj_t * pC, Aig_Obj_t * p1, Aig_Obj_t * p0 ); +extern Aig_Obj_t * Aig_Maj( Aig_Man_t * p, Aig_Obj_t * pA, Aig_Obj_t * pB, Aig_Obj_t * pC ); +extern Aig_Obj_t * Aig_Miter( Aig_Man_t * p, Vec_Ptr_t * vPairs ); +extern Aig_Obj_t * Aig_MiterTwo( Aig_Man_t * p, Vec_Ptr_t * vNodes1, Vec_Ptr_t * vNodes2 ); +extern Aig_Obj_t * Aig_CreateAnd( Aig_Man_t * p, int nVars ); +extern Aig_Obj_t * Aig_CreateOr( Aig_Man_t * p, int nVars ); +extern Aig_Obj_t * Aig_CreateExor( Aig_Man_t * p, int nVars ); +/*=== aigOrder.c =========================================================*/ +extern void Aig_ManOrderStart( Aig_Man_t * p ); +extern void Aig_ManOrderStop( Aig_Man_t * p ); +extern void Aig_ObjOrderInsert( Aig_Man_t * p, int ObjId ); +extern void Aig_ObjOrderRemove( Aig_Man_t * p, int ObjId ); +extern void Aig_ObjOrderAdvance( Aig_Man_t * p ); +/*=== aigPart.c =========================================================*/ +extern Vec_Ptr_t * Aig_ManSupports( Aig_Man_t * pMan ); +extern Vec_Ptr_t * Aig_ManPartitionSmart( Aig_Man_t * p, int nPartSizeLimit, int fVerbose, Vec_Ptr_t ** pvPartSupps ); +extern Vec_Ptr_t * Aig_ManPartitionNaive( Aig_Man_t * p, int nPartSize ); +extern Vec_Ptr_t * Aig_ManMiterPartitioned( Aig_Man_t * p1, Aig_Man_t * p2, int nPartSize ); +extern Aig_Man_t * Aig_ManChoicePartitioned( Vec_Ptr_t * vAigs, int nPartSize, int fVerbose ); +/*=== aigRepr.c =========================================================*/ +extern void Aig_ManReprStart( Aig_Man_t * p, int nIdMax ); +extern void Aig_ManReprStop( Aig_Man_t * p ); +extern void Aig_ObjCreateRepr( Aig_Man_t * p, Aig_Obj_t * pNode1, Aig_Obj_t * pNode2 ); +extern void Aig_ManTransferRepr( Aig_Man_t * pNew, Aig_Man_t * p ); +extern Aig_Man_t * Aig_ManDupRepr( Aig_Man_t * p, int fOrdered ); +extern Aig_Man_t * Aig_ManRehash( Aig_Man_t * p ); +extern void Aig_ManMarkValidChoices( Aig_Man_t * p ); +/*=== aigRet.c ========================================================*/ +extern Aig_Man_t * Rtm_ManRetime( Aig_Man_t * p, int fForward, int nStepsMax, int fVerbose ); +/*=== aigScl.c ==========================================================*/ +extern Aig_Man_t * Aig_ManRemap( Aig_Man_t * p, Vec_Ptr_t * vMap ); +extern int Aig_ManSeqCleanup( Aig_Man_t * p ); +extern int Aig_ManCountMergeRegs( Aig_Man_t * p ); +extern Aig_Man_t * Aig_ManReduceLaches( Aig_Man_t * p, int fVerbose ); +/*=== aigSeq.c ========================================================*/ +extern int Aig_ManSeqStrash( Aig_Man_t * p, int nLatches, int * pInits ); +/*=== aigShow.c ========================================================*/ +extern void Aig_ManShow( Aig_Man_t * pMan, int fHaig, Vec_Ptr_t * vBold ); +/*=== aigTable.c ========================================================*/ +extern Aig_Obj_t * Aig_TableLookup( Aig_Man_t * p, Aig_Obj_t * pGhost ); +extern Aig_Obj_t * Aig_TableLookupTwo( Aig_Man_t * p, Aig_Obj_t * pFanin0, Aig_Obj_t * pFanin1 ); +extern void Aig_TableInsert( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern void Aig_TableDelete( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern int Aig_TableCountEntries( Aig_Man_t * p ); +extern void Aig_TableProfile( Aig_Man_t * p ); +/*=== aigTiming.c ========================================================*/ +extern void Aig_ObjClearReverseLevel( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern int Aig_ObjRequiredLevel( Aig_Man_t * p, Aig_Obj_t * pObj ); +extern void Aig_ManStartReverseLevels( Aig_Man_t * p, int nMaxLevelIncrease ); +extern void Aig_ManStopReverseLevels( Aig_Man_t * p ); +extern void Aig_ManUpdateLevel( Aig_Man_t * p, Aig_Obj_t * pObjNew ); +extern void Aig_ManUpdateReverseLevel( Aig_Man_t * p, Aig_Obj_t * pObjNew ); +extern void Aig_ManVerifyLevel( Aig_Man_t * p ); +extern void Aig_ManVerifyReverseLevel( Aig_Man_t * p ); +/*=== aigTruth.c ========================================================*/ +extern unsigned * Aig_ManCutTruth( Aig_Obj_t * pRoot, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vNodes, Vec_Ptr_t * vTruthElem, Vec_Ptr_t * vTruthStore ); +/*=== aigTsim.c ========================================================*/ +extern Aig_Man_t * Aig_ManConstReduce( Aig_Man_t * p, int fVerbose ); +/*=== aigUtil.c =========================================================*/ +extern unsigned Aig_PrimeCudd( unsigned p ); +extern void Aig_ManIncrementTravId( Aig_Man_t * p ); +extern int Aig_ManLevels( Aig_Man_t * p ); +extern void Aig_ManResetRefs( Aig_Man_t * p ); +extern void Aig_ManCleanMarkA( Aig_Man_t * p ); +extern void Aig_ManCleanMarkB( Aig_Man_t * p ); +extern void Aig_ManCleanData( Aig_Man_t * p ); +extern void Aig_ObjCleanData_rec( Aig_Obj_t * pObj ); +extern void Aig_ObjCollectMulti( Aig_Obj_t * pFunc, Vec_Ptr_t * vSuper ); +extern int Aig_ObjIsMuxType( Aig_Obj_t * pObj ); +extern int Aig_ObjRecognizeExor( Aig_Obj_t * pObj, Aig_Obj_t ** ppFan0, Aig_Obj_t ** ppFan1 ); +extern Aig_Obj_t * Aig_ObjRecognizeMux( Aig_Obj_t * pObj, Aig_Obj_t ** ppObjT, Aig_Obj_t ** ppObjE ); +extern Aig_Obj_t * Aig_ObjReal_rec( Aig_Obj_t * pObj ); +extern void Aig_ObjPrintEqn( FILE * pFile, Aig_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ); +extern void Aig_ObjPrintVerilog( FILE * pFile, Aig_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ); +extern void Aig_ObjPrintVerbose( Aig_Obj_t * pObj, int fHaig ); +extern void Aig_ManPrintVerbose( Aig_Man_t * p, int fHaig ); +extern void Aig_ManDump( Aig_Man_t * p ); +extern void Aig_ManDumpBlif( Aig_Man_t * p, char * pFileName ); +extern void Aig_ManDumpVerilog( Aig_Man_t * p, char * pFileName ); +/*=== aigWin.c =========================================================*/ +extern void Aig_ManFindCut( Aig_Obj_t * pRoot, Vec_Ptr_t * vFront, Vec_Ptr_t * vVisited, int nSizeLimit, int nFanoutLimit ); + +/*=== aigMem.c ===========================================================*/ +// fixed-size-block memory manager +extern Aig_MmFixed_t * Aig_MmFixedStart( int nEntrySize, int nEntriesMax ); +extern void Aig_MmFixedStop( Aig_MmFixed_t * p, int fVerbose ); +extern char * Aig_MmFixedEntryFetch( Aig_MmFixed_t * p ); +extern void Aig_MmFixedEntryRecycle( Aig_MmFixed_t * p, char * pEntry ); +extern void Aig_MmFixedRestart( Aig_MmFixed_t * p ); +extern int Aig_MmFixedReadMemUsage( Aig_MmFixed_t * p ); +extern int Aig_MmFixedReadMaxEntriesUsed( Aig_MmFixed_t * p ); +// flexible-size-block memory manager +extern Aig_MmFlex_t * Aig_MmFlexStart(); +extern void Aig_MmFlexStop( Aig_MmFlex_t * p, int fVerbose ); +extern char * Aig_MmFlexEntryFetch( Aig_MmFlex_t * p, int nBytes ); +extern void Aig_MmFlexRestart( Aig_MmFlex_t * p ); +extern int Aig_MmFlexReadMemUsage( Aig_MmFlex_t * p ); +// hierarchical memory manager +extern Aig_MmStep_t * Aig_MmStepStart( int nSteps ); +extern void Aig_MmStepStop( Aig_MmStep_t * p, int fVerbose ); +extern char * Aig_MmStepEntryFetch( Aig_MmStep_t * p, int nBytes ); +extern void Aig_MmStepEntryRecycle( Aig_MmStep_t * p, char * pEntry, int nBytes ); +extern int Aig_MmStepReadMemUsage( Aig_MmStep_t * p ); + +/*=== aigTime.c ===========================================================*/ +extern Aig_TMan_t * Aig_TManStart( int nPis, int nPos ); +extern void Aig_TManStop( Aig_TMan_t * p ); +extern void Aig_TManCreateBox( Aig_TMan_t * p, int * pPis, int nPis, int * pPos, int nPos, float * pPiTimes, float * pPoTimes ); +extern void Aig_TManSetPiDelay( Aig_TMan_t * p, int iPi, float Delay ); +extern void Aig_TManSetPoDelay( Aig_TMan_t * p, int iPo, float Delay ); +extern void Aig_TManSetPiArrival( Aig_TMan_t * p, int iPi, float Delay ); +extern void Aig_TManSetPoRequired( Aig_TMan_t * p, int iPo, float Delay ); +extern void Aig_TManIncrementTravId( Aig_TMan_t * p ); +extern float Aig_TManGetPiArrival( Aig_TMan_t * p, int iPi ); +extern float Aig_TManGetPoRequired( Aig_TMan_t * p, int iPo ); + + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/aig/aigCheck.c b/src/aig/aig/aigCheck.c new file mode 100644 index 00000000..8c53e635 --- /dev/null +++ b/src/aig/aig/aigCheck.c @@ -0,0 +1,163 @@ +/**CFile**************************************************************** + + FileName [aigCheck.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [AIG checking procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigCheck.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Checks the consistency of the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManCheck( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pObj2; + int i; + // check primary inputs + Aig_ManForEachPi( p, pObj, i ) + { + if ( Aig_ObjFanin0(pObj) || Aig_ObjFanin1(pObj) ) + { + printf( "Aig_ManCheck: The PI node \"%p\" has fanins.\n", pObj ); + return 0; + } + } + // check primary outputs + Aig_ManForEachPo( p, pObj, i ) + { + if ( !Aig_ObjFanin0(pObj) ) + { + printf( "Aig_ManCheck: The PO node \"%p\" has NULL fanin.\n", pObj ); + return 0; + } + if ( Aig_ObjFanin1(pObj) ) + { + printf( "Aig_ManCheck: The PO node \"%p\" has second fanin.\n", pObj ); + return 0; + } + } + // check internal nodes + Aig_ManForEachObj( p, pObj, i ) + { + if ( !Aig_ObjIsNode(pObj) ) + continue; + if ( !Aig_ObjFanin0(pObj) || !Aig_ObjFanin1(pObj) ) + { + printf( "Aig_ManCheck: The AIG has internal node \"%p\" with a NULL fanin.\n", pObj ); + return 0; + } + if ( Aig_ObjFanin0(pObj)->Id >= Aig_ObjFanin1(pObj)->Id ) + { + printf( "Aig_ManCheck: The AIG has node \"%p\" with a wrong ordering of fanins.\n", pObj ); + return 0; + } + pObj2 = Aig_TableLookup( p, pObj ); + if ( pObj2 != pObj ) + { + printf( "Aig_ManCheck: Node \"%p\" is not in the structural hashing table.\n", pObj ); + return 0; + } + } + // count the total number of nodes + if ( Aig_ManObjNum(p) != 1 + Aig_ManPiNum(p) + Aig_ManPoNum(p) + + Aig_ManBufNum(p) + Aig_ManAndNum(p) + Aig_ManExorNum(p) + Aig_ManLatchNum(p) ) + { + printf( "Aig_ManCheck: The number of created nodes is wrong.\n" ); + printf( "C1 = %d. Pi = %d. Po = %d. Buf = %d. And = %d. Xor = %d. Lat = %d. Total = %d.\n", + 1, Aig_ManPiNum(p), Aig_ManPoNum(p), Aig_ManBufNum(p), Aig_ManAndNum(p), Aig_ManExorNum(p), Aig_ManLatchNum(p), + 1 + Aig_ManPiNum(p) + Aig_ManPoNum(p) + Aig_ManBufNum(p) + Aig_ManAndNum(p) + Aig_ManExorNum(p) + Aig_ManLatchNum(p) ); + printf( "Created = %d. Deleted = %d. Existing = %d.\n", + p->nCreated, p->nDeleted, p->nCreated - p->nDeleted ); + return 0; + } + // count the number of nodes in the table + if ( Aig_TableCountEntries(p) != Aig_ManAndNum(p) + Aig_ManExorNum(p) + Aig_ManLatchNum(p) ) + { + printf( "Aig_ManCheck: The number of nodes in the structural hashing table is wrong.\n" ); + printf( "Entries = %d. And = %d. Xor = %d. Lat = %d. Total = %d.\n", + Aig_TableCountEntries(p), Aig_ManAndNum(p), Aig_ManExorNum(p), Aig_ManLatchNum(p), + Aig_ManAndNum(p) + Aig_ManExorNum(p) + Aig_ManLatchNum(p) ); + + return 0; + } +// if ( !Aig_ManIsAcyclic(p) ) +// return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Checks if the markA is reset.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManCheckMarkA( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p, pObj, i ) + assert( pObj->fMarkA == 0 ); +} + +/**Function************************************************************* + + Synopsis [Checks the consistency of phase assignment.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManCheckPhase( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsPi(pObj) ) + assert( (int)pObj->fPhase == 0 ); + else + assert( (int)pObj->fPhase == (Aig_ObjPhaseReal(Aig_ObjChild0(pObj)) & Aig_ObjPhaseReal(Aig_ObjChild1(pObj))) ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigDfs.c b/src/aig/aig/aigDfs.c new file mode 100644 index 00000000..dedfeb4a --- /dev/null +++ b/src/aig/aig/aigDfs.c @@ -0,0 +1,700 @@ +/**CFile**************************************************************** + + FileName [aigDfs.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [DFS traversal procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigDfs.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDfs_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + if ( pObj == NULL ) + return; + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + return; + assert( Aig_ObjIsNode(pObj) || Aig_ObjIsBuf(pObj) ); + Aig_ManDfs_rec( p, Aig_ObjFanin0(pObj), vNodes ); + Aig_ManDfs_rec( p, Aig_ObjFanin1(pObj), vNodes ); + assert( !Aig_ObjIsTravIdCurrent(p, pObj) ); // loop detection + Aig_ObjSetTravIdCurrent(p, pObj); + Vec_PtrPush( vNodes, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDfs( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + Aig_ManIncrementTravId( p ); + // mark constant and PIs + Aig_ObjSetTravIdCurrent( p, Aig_ManConst1(p) ); + Aig_ManForEachPi( p, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // if there are latches, mark them + if ( Aig_ManLatchNum(p) > 0 ) + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsLatch(pObj) ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // go through the nodes + vNodes = Vec_PtrAlloc( Aig_ManNodeNum(p) ); + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsNode(pObj) || Aig_ObjIsBuf(pObj) ) + Aig_ManDfs_rec( p, pObj, vNodes ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDfsNodes( Aig_Man_t * p, Aig_Obj_t ** ppNodes, int nNodes ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + assert( Aig_ManLatchNum(p) == 0 ); + Aig_ManIncrementTravId( p ); + // mark constant and PIs + Aig_ObjSetTravIdCurrent( p, Aig_ManConst1(p) ); + Aig_ManForEachPi( p, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // go through the nodes + vNodes = Vec_PtrAlloc( Aig_ManNodeNum(p) ); + for ( i = 0; i < nNodes; i++ ) + Aig_ManDfs_rec( p, ppNodes[i], vNodes ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDfsChoices_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + if ( pObj == NULL ) + return; + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + return; + assert( Aig_ObjIsNode(pObj) ); + Aig_ManDfsChoices_rec( p, Aig_ObjFanin0(pObj), vNodes ); + Aig_ManDfsChoices_rec( p, Aig_ObjFanin1(pObj), vNodes ); + Aig_ManDfsChoices_rec( p, p->pEquivs[pObj->Id], vNodes ); + assert( !Aig_ObjIsTravIdCurrent(p, pObj) ); // loop detection + Aig_ObjSetTravIdCurrent(p, pObj); + Vec_PtrPush( vNodes, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDfsChoices( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + assert( p->pEquivs != NULL ); + Aig_ManIncrementTravId( p ); + // mark constant and PIs + Aig_ObjSetTravIdCurrent( p, Aig_ManConst1(p) ); + Aig_ManForEachPi( p, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // go through the nodes + vNodes = Vec_PtrAlloc( Aig_ManNodeNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + Aig_ManDfsChoices_rec( p, Aig_ObjFanin0(pObj), vNodes ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the reverse DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDfsReverse_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + Aig_Obj_t * pFanout; + int iFanout = -1, i; + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + return; + assert( Aig_ObjIsNode(pObj) || Aig_ObjIsBuf(pObj) ); + Aig_ObjForEachFanout( p, pObj, pFanout, iFanout, i ) + Aig_ManDfsReverse_rec( p, pFanout, vNodes ); + assert( !Aig_ObjIsTravIdCurrent(p, pObj) ); // loop detection + Aig_ObjSetTravIdCurrent(p, pObj); + Vec_PtrPush( vNodes, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the reverse DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDfsReverse( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + Aig_ManIncrementTravId( p ); + // mark POs + Aig_ManForEachPo( p, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // if there are latches, mark them + if ( Aig_ManLatchNum(p) > 0 ) + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsLatch(pObj) ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // go through the nodes + vNodes = Vec_PtrAlloc( Aig_ManNodeNum(p) ); + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsNode(pObj) || Aig_ObjIsBuf(pObj) ) + Aig_ManDfsReverse_rec( p, pObj, vNodes ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Computes the max number of levels in the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManLevelNum( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i, LevelsMax; + LevelsMax = 0; + Aig_ManForEachPo( p, pObj, i ) + LevelsMax = AIG_MAX( LevelsMax, (int)Aig_ObjFanin0(pObj)->Level ); + return LevelsMax; +} + +/**Function************************************************************* + + Synopsis [Computes the max number of levels in the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManCountLevels( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i, LevelsMax, Level0, Level1; + // initialize the levels + Aig_ManConst1(p)->iData = 0; + Aig_ManForEachPi( p, pObj, i ) + pObj->iData = 0; + // compute levels in a DFS order + vNodes = Aig_ManDfs( p ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + Level0 = Aig_ObjFanin0(pObj)->iData; + Level1 = Aig_ObjFanin1(pObj)->iData; + pObj->iData = 1 + Aig_ObjIsExor(pObj) + AIG_MAX(Level0, Level1); + } + Vec_PtrFree( vNodes ); + // get levels of the POs + LevelsMax = 0; + Aig_ManForEachPo( p, pObj, i ) + LevelsMax = AIG_MAX( LevelsMax, Aig_ObjFanin0(pObj)->iData ); + return LevelsMax; +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ConeMark_rec( Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) || Aig_ObjIsMarkA(pObj) ) + return; + Aig_ConeMark_rec( Aig_ObjFanin0(pObj) ); + Aig_ConeMark_rec( Aig_ObjFanin1(pObj) ); + assert( !Aig_ObjIsMarkA(pObj) ); // loop detection + Aig_ObjSetMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ConeCleanAndMark_rec( Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) || Aig_ObjIsMarkA(pObj) ) + return; + Aig_ConeCleanAndMark_rec( Aig_ObjFanin0(pObj) ); + Aig_ConeCleanAndMark_rec( Aig_ObjFanin1(pObj) ); + assert( !Aig_ObjIsMarkA(pObj) ); // loop detection + Aig_ObjSetMarkA( pObj ); + pObj->pData = NULL; +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ConeCountAndMark_rec( Aig_Obj_t * pObj ) +{ + int Counter; + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) || Aig_ObjIsMarkA(pObj) ) + return 0; + Counter = 1 + Aig_ConeCountAndMark_rec( Aig_ObjFanin0(pObj) ) + + Aig_ConeCountAndMark_rec( Aig_ObjFanin1(pObj) ); + assert( !Aig_ObjIsMarkA(pObj) ); // loop detection + Aig_ObjSetMarkA( pObj ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ConeUnmark_rec( Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) || !Aig_ObjIsMarkA(pObj) ) + return; + Aig_ConeUnmark_rec( Aig_ObjFanin0(pObj) ); + Aig_ConeUnmark_rec( Aig_ObjFanin1(pObj) ); + assert( Aig_ObjIsMarkA(pObj) ); // loop detection + Aig_ObjClearMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_DagSize( Aig_Obj_t * pObj ) +{ + int Counter; + Counter = Aig_ConeCountAndMark_rec( Aig_Regular(pObj) ); + Aig_ConeUnmark_rec( Aig_Regular(pObj) ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Counts the support size of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_SupportSize_rec( Aig_Man_t * p, Aig_Obj_t * pObj, int * pCounter ) +{ + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + return; + Aig_ObjSetTravIdCurrent(p, pObj); + if ( Aig_ObjIsPi(pObj) ) + { + (*pCounter)++; + return; + } + assert( Aig_ObjIsNode(pObj) || Aig_ObjIsBuf(pObj) ); + Aig_SupportSize_rec( p, Aig_ObjFanin0(pObj), pCounter ); + if ( Aig_ObjFanin1(pObj) ) + Aig_SupportSize_rec( p, Aig_ObjFanin1(pObj), pCounter ); +} + +/**Function************************************************************* + + Synopsis [Counts the support size of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_SupportSize( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + int Counter = 0; + assert( !Aig_IsComplement(pObj) ); + assert( !Aig_ObjIsPo(pObj) ); + Aig_ManIncrementTravId( p ); + Aig_SupportSize_rec( p, pObj, &Counter ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Transfers the AIG from one manager into another.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_Transfer_rec( Aig_Man_t * pDest, Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) || Aig_ObjIsMarkA(pObj) ) + return; + Aig_Transfer_rec( pDest, Aig_ObjFanin0(pObj) ); + Aig_Transfer_rec( pDest, Aig_ObjFanin1(pObj) ); + pObj->pData = Aig_And( pDest, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); + assert( !Aig_ObjIsMarkA(pObj) ); // loop detection + Aig_ObjSetMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Transfers the AIG from one manager into another.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Transfer( Aig_Man_t * pSour, Aig_Man_t * pDest, Aig_Obj_t * pRoot, int nVars ) +{ + Aig_Obj_t * pObj; + int i; + // solve simple cases + if ( pSour == pDest ) + return pRoot; + if ( Aig_ObjIsConst1( Aig_Regular(pRoot) ) ) + return Aig_NotCond( Aig_ManConst1(pDest), Aig_IsComplement(pRoot) ); + // set the PI mapping + Aig_ManForEachPi( pSour, pObj, i ) + { + if ( i == nVars ) + break; + pObj->pData = Aig_IthVar(pDest, i); + } + // transfer and set markings + Aig_Transfer_rec( pDest, Aig_Regular(pRoot) ); + // clear the markings + Aig_ConeUnmark_rec( Aig_Regular(pRoot) ); + return Aig_NotCond( Aig_Regular(pRoot)->pData, Aig_IsComplement(pRoot) ); +} + +/**Function************************************************************* + + Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_Compose_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFunc, Aig_Obj_t * pVar ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsMarkA(pObj) ) + return; + if ( Aig_ObjIsConst1(pObj) || Aig_ObjIsPi(pObj) ) + { + pObj->pData = pObj == pVar ? pFunc : pObj; + return; + } + Aig_Compose_rec( p, Aig_ObjFanin0(pObj), pFunc, pVar ); + Aig_Compose_rec( p, Aig_ObjFanin1(pObj), pFunc, pVar ); + pObj->pData = Aig_And( p, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); + assert( !Aig_ObjIsMarkA(pObj) ); // loop detection + Aig_ObjSetMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Compose( Aig_Man_t * p, Aig_Obj_t * pRoot, Aig_Obj_t * pFunc, int iVar ) +{ + // quit if the PI variable is not defined + if ( iVar >= Aig_ManPiNum(p) ) + { + printf( "Aig_Compose(): The PI variable %d is not defined.\n", iVar ); + return NULL; + } + // recursively perform composition + Aig_Compose_rec( p, Aig_Regular(pRoot), pFunc, Aig_ManPi(p, iVar) ); + // clear the markings + Aig_ConeUnmark_rec( Aig_Regular(pRoot) ); + return Aig_NotCond( Aig_Regular(pRoot)->pData, Aig_IsComplement(pRoot) ); +} + +/**Function************************************************************* + + Synopsis [Computes the internal nodes of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjCollectCut_rec( Aig_Obj_t * pNode, Vec_Ptr_t * vNodes ) +{ +// Aig_Obj_t * pFan0 = Aig_ObjFanin0(pNode); +// Aig_Obj_t * pFan1 = Aig_ObjFanin1(pNode); + if ( pNode->fMarkA ) + return; + pNode->fMarkA = 1; + assert( Aig_ObjIsNode(pNode) ); + Aig_ObjCollectCut_rec( Aig_ObjFanin0(pNode), vNodes ); + Aig_ObjCollectCut_rec( Aig_ObjFanin1(pNode), vNodes ); + Vec_PtrPush( vNodes, pNode ); +//printf( "added %d ", pNode->Id ); +} + +/**Function************************************************************* + + Synopsis [Computes the internal nodes of the cut.] + + Description [Does not include the leaves of the cut.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjCollectCut( Aig_Obj_t * pRoot, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vNodes ) +{ + Aig_Obj_t * pObj; + int i; + // collect and mark the leaves + Vec_PtrClear( vNodes ); + Vec_PtrForEachEntry( vLeaves, pObj, i ) + { + assert( pObj->fMarkA == 0 ); + pObj->fMarkA = 1; +// printf( "%d " , pObj->Id ); + } +//printf( "\n" ); + // collect and mark the nodes + Aig_ObjCollectCut_rec( pRoot, vNodes ); + // clean the nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + pObj->fMarkA = 0; + Vec_PtrForEachEntry( vLeaves, pObj, i ) + pObj->fMarkA = 0; +} + + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjCollectSuper_rec( Aig_Obj_t * pRoot, Aig_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + int RetValue1, RetValue2, i; + // check if the node is visited + if ( Aig_Regular(pObj)->fMarkA ) + { + // check if the node occurs in the same polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == pObj ) + return 1; + // check if the node is present in the opposite polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == Aig_Not(pObj) ) + return -1; + assert( 0 ); + return 0; + } + // if the new node is complemented or a PI, another gate begins + if ( pObj != pRoot && (Aig_IsComplement(pObj) || Aig_ObjType(pObj) != Aig_ObjType(pRoot) || Aig_ObjRefs(pObj) > 1) ) + { + Vec_PtrPush( vSuper, pObj ); + Aig_Regular(pObj)->fMarkA = 1; + return 0; + } + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsNode(pObj) ); + // go through the branches + RetValue1 = Aig_ObjCollectSuper_rec( pRoot, Aig_ObjReal_rec( Aig_ObjChild0(pObj) ), vSuper ); + RetValue2 = Aig_ObjCollectSuper_rec( pRoot, Aig_ObjReal_rec( Aig_ObjChild1(pObj) ), vSuper ); + if ( RetValue1 == -1 || RetValue2 == -1 ) + return -1; + // return 1 if at least one branch has a duplicate + return RetValue1 || RetValue2; +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjCollectSuper( Aig_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + int RetValue, i; + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsNode(pObj) ); + // collect the nodes in the implication supergate + Vec_PtrClear( vSuper ); + RetValue = Aig_ObjCollectSuper_rec( pObj, pObj, vSuper ); + assert( Vec_PtrSize(vSuper) > 1 ); + // unmark the visited nodes + Vec_PtrForEachEntry( vSuper, pObj, i ) + Aig_Regular(pObj)->fMarkA = 0; + // if we found the node and its complement in the same implication supergate, + // return empty set of nodes (meaning that we should use constant-0 node) + if ( RetValue == -1 ) + vSuper->nSize = 0; + return RetValue; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigFanout.c b/src/aig/aig/aigFanout.c new file mode 100644 index 00000000..d0beb128 --- /dev/null +++ b/src/aig/aig/aigFanout.c @@ -0,0 +1,189 @@ +/**CFile**************************************************************** + + FileName [aigFanout.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Fanout manipulation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigFanout.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +// 0: first iFan +// 1: prev iFan0 +// 2: prev iFan1 +// 3: next iFan0 +// 4: next iFan1 + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static inline int Aig_FanoutCreate( int FanId, int Num ) { assert( Num < 2 ); return (FanId << 1) | Num; } +static inline int * Aig_FanoutObj( int * pData, int ObjId ) { return pData + 5*ObjId; } +static inline int * Aig_FanoutPrev( int * pData, int iFan ) { return pData + 5*(iFan >> 1) + 1 + (iFan & 1); } +static inline int * Aig_FanoutNext( int * pData, int iFan ) { return pData + 5*(iFan >> 1) + 3 + (iFan & 1); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Create fanout for all objects in the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManFanoutStart( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + assert( Aig_ManBufNum(p) == 0 ); + // allocate fanout datastructure + assert( p->pFanData == NULL ); + p->nFansAlloc = 2 * Aig_ManObjNumMax(p); + if ( p->nFansAlloc < (1<<12) ) + p->nFansAlloc = (1<<12); + p->pFanData = ALLOC( int, 5 * p->nFansAlloc ); + memset( p->pFanData, 0, sizeof(int) * 5 * p->nFansAlloc ); + // add fanouts for all objects + Aig_ManForEachObj( p, pObj, i ) + { + if ( Aig_ObjChild0(pObj) ) + Aig_ObjAddFanout( p, Aig_ObjFanin0(pObj), pObj ); + if ( Aig_ObjChild1(pObj) ) + Aig_ObjAddFanout( p, Aig_ObjFanin1(pObj), pObj ); + } +} + +/**Function************************************************************* + + Synopsis [Deletes fanout for all objects in the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManFanoutStop( Aig_Man_t * p ) +{ + assert( p->pFanData != NULL ); + FREE( p->pFanData ); + p->nFansAlloc = 0; +} + +/**Function************************************************************* + + Synopsis [Adds fanout (pFanout) of node (pObj).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjAddFanout( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFanout ) +{ + int iFan, * pFirst, * pPrevC, * pNextC, * pPrev, * pNext; + assert( p->pFanData ); + assert( !Aig_IsComplement(pObj) && !Aig_IsComplement(pFanout) ); + assert( pFanout->Id > 0 ); + if ( pObj->Id >= p->nFansAlloc || pFanout->Id >= p->nFansAlloc ) + { + int nFansAlloc = 2 * AIG_MAX( pObj->Id, pFanout->Id ); + p->pFanData = REALLOC( int, p->pFanData, 5 * nFansAlloc ); + memset( p->pFanData + 5 * p->nFansAlloc, 0, sizeof(int) * 5 * (nFansAlloc - p->nFansAlloc) ); + p->nFansAlloc = nFansAlloc; + } + assert( pObj->Id < p->nFansAlloc && pFanout->Id < p->nFansAlloc ); + iFan = Aig_FanoutCreate( pFanout->Id, Aig_ObjWhatFanin(pFanout, pObj) ); + pPrevC = Aig_FanoutPrev( p->pFanData, iFan ); + pNextC = Aig_FanoutNext( p->pFanData, iFan ); + pFirst = Aig_FanoutObj( p->pFanData, pObj->Id ); + if ( *pFirst == 0 ) + { + *pFirst = iFan; + *pPrevC = iFan; + *pNextC = iFan; + } + else + { + pPrev = Aig_FanoutPrev( p->pFanData, *pFirst ); + pNext = Aig_FanoutNext( p->pFanData, *pPrev ); + assert( *pNext == *pFirst ); + *pPrevC = *pPrev; + *pNextC = *pFirst; + *pPrev = iFan; + *pNext = iFan; + } +} + +/**Function************************************************************* + + Synopsis [Removes fanout (pFanout) of node (pObj).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjRemoveFanout( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFanout ) +{ + int iFan, * pFirst, * pPrevC, * pNextC, * pPrev, * pNext; + assert( p->pFanData && pObj->Id < p->nFansAlloc && pFanout->Id < p->nFansAlloc ); + assert( !Aig_IsComplement(pObj) && !Aig_IsComplement(pFanout) ); + assert( pFanout->Id > 0 ); + iFan = Aig_FanoutCreate( pFanout->Id, Aig_ObjWhatFanin(pFanout, pObj) ); + pPrevC = Aig_FanoutPrev( p->pFanData, iFan ); + pNextC = Aig_FanoutNext( p->pFanData, iFan ); + pPrev = Aig_FanoutPrev( p->pFanData, *pNextC ); + pNext = Aig_FanoutNext( p->pFanData, *pPrevC ); + assert( *pPrev == iFan ); + assert( *pNext == iFan ); + pFirst = Aig_FanoutObj( p->pFanData, pObj->Id ); + assert( *pFirst > 0 ); + if ( *pFirst == iFan ) + { + if ( *pNextC == iFan ) + { + *pFirst = 0; + *pPrev = 0; + *pNext = 0; + *pPrevC = 0; + *pNextC = 0; + return; + } + *pFirst = *pNextC; + } + *pPrev = *pPrevC; + *pNext = *pNextC; + *pPrevC = 0; + *pNextC = 0; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigMan.c b/src/aig/aig/aigMan.c new file mode 100644 index 00000000..fed6aebd --- /dev/null +++ b/src/aig/aig/aigMan.c @@ -0,0 +1,325 @@ +/**CFile**************************************************************** + + FileName [aigMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [AIG manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigMan.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the AIG manager.] + + Description [The argument of this procedure is a soft limit on the + the number of nodes, or 0 if the limit is unknown.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManStart( int nNodesMax ) +{ + Aig_Man_t * p; + if ( nNodesMax <= 0 ) + nNodesMax = 10007; + // start the manager + p = ALLOC( Aig_Man_t, 1 ); + memset( p, 0, sizeof(Aig_Man_t) ); + // perform initializations + p->nTravIds = 1; + p->fCatchExor = 0; + // allocate arrays for nodes + p->vPis = Vec_PtrAlloc( 100 ); + p->vPos = Vec_PtrAlloc( 100 ); + p->vObjs = Vec_PtrAlloc( 1000 ); + p->vBufs = Vec_PtrAlloc( 100 ); + // prepare the internal memory manager + p->pMemObjs = Aig_MmFixedStart( sizeof(Aig_Obj_t), nNodesMax ); + // create the constant node + p->pConst1 = Aig_ManFetchMemory( p ); + p->pConst1->Type = AIG_OBJ_CONST1; + p->pConst1->fPhase = 1; + p->nObjs[AIG_OBJ_CONST1]++; + // start the table + p->nTableSize = Aig_PrimeCudd( nNodesMax ); + p->pTable = ALLOC( Aig_Obj_t *, p->nTableSize ); + memset( p->pTable, 0, sizeof(Aig_Obj_t *) * p->nTableSize ); + return p; +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManStartFrom( Aig_Man_t * p ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj; + int i; + // create the new manager + pNew = Aig_ManStart( Aig_ManObjNumMax(p) ); + pNew->pName = Aig_UtilStrsav( p->pName ); + // create the PIs + Aig_ManConst1(p)->pData = Aig_ManConst1(pNew); + Aig_ManForEachPi( p, pObj, i ) + pObj->pData = Aig_ObjCreatePi(pNew); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager recursively.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ManDup_rec( Aig_Man_t * pNew, Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + if ( pObj->pData ) + return pObj->pData; + Aig_ManDup_rec( pNew, p, Aig_ObjFanin0(pObj) ); + if ( Aig_ObjIsBuf(pObj) ) + return pObj->pData = Aig_ObjChild0Copy(pObj); + Aig_ManDup_rec( pNew, p, Aig_ObjFanin1(pObj) ); + return pObj->pData = Aig_And( pNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManDup( Aig_Man_t * p, int fOrdered ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj; + int i; + // create the new manager + pNew = Aig_ManStart( Aig_ManObjNumMax(p) ); + pNew->pName = Aig_UtilStrsav( p->pName ); + pNew->nRegs = p->nRegs; + pNew->nAsserts = p->nAsserts; + if ( p->vFlopNums ) + pNew->vFlopNums = Vec_IntDup( p->vFlopNums ); + // create the PIs + Aig_ManCleanData( p ); + Aig_ManConst1(p)->pData = Aig_ManConst1(pNew); + Aig_ManForEachPi( p, pObj, i ) + pObj->pData = Aig_ObjCreatePi(pNew); + // duplicate internal nodes + if ( fOrdered ) + { + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsBuf(pObj) ) + pObj->pData = Aig_ObjChild0Copy(pObj); + else if ( Aig_ObjIsNode(pObj) ) + pObj->pData = Aig_And( pNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); + } + else + { + Aig_ManForEachObj( p, pObj, i ) + if ( !Aig_ObjIsPo(pObj) ) + { + Aig_ManDup_rec( pNew, p, pObj ); + assert( pObj->Level == ((Aig_Obj_t*)pObj->pData)->Level ); + } + } + // add the POs + Aig_ManForEachPo( p, pObj, i ) + Aig_ObjCreatePo( pNew, Aig_ObjChild0Copy(pObj) ); + assert( Aig_ManBufNum(p) != 0 || Aig_ManNodeNum(p) == Aig_ManNodeNum(pNew) ); + // check the resulting network + if ( !Aig_ManCheck(pNew) ) + printf( "Aig_ManDup(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Extracts the miter composed of XOR of the two nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManExtractMiter( Aig_Man_t * p, Aig_Obj_t * pNode1, Aig_Obj_t * pNode2 ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj; + int i; + // create the new manager + pNew = Aig_ManStart( Aig_ManObjNumMax(p) ); + pNew->pName = Aig_UtilStrsav( p->pName ); + // create the PIs + Aig_ManCleanData( p ); + Aig_ManConst1(p)->pData = Aig_ManConst1(pNew); + Aig_ManForEachPi( p, pObj, i ) + pObj->pData = Aig_ObjCreatePi(pNew); + // dump the nodes + Aig_ManDup_rec( pNew, p, pNode1 ); + Aig_ManDup_rec( pNew, p, pNode2 ); + // construct the EXOR + pObj = Aig_Exor( pNew, pNode1->pData, pNode2->pData ); + pObj = Aig_NotCond( pObj, Aig_Regular(pObj)->fPhase ^ Aig_IsComplement(pObj) ); + // add the PO + Aig_ObjCreatePo( pNew, pObj ); + // check the resulting network + if ( !Aig_ManCheck(pNew) ) + printf( "Aig_ManDup(): The check has failed.\n" ); + return pNew; +} + + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManStop( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + if ( p->vMapped ) + Vec_PtrFree( p->vMapped ); + // print time + if ( p->time1 ) { PRT( "time1", p->time1 ); } + if ( p->time2 ) { PRT( "time2", p->time2 ); } + // delete timing + if ( p->pManTime ) + Aig_TManStop( p->pManTime ); + // delete fanout + if ( p->pFanData ) + Aig_ManFanoutStop( p ); + // make sure the nodes have clean marks + Aig_ManForEachObj( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); +// Aig_TableProfile( p ); + Aig_MmFixedStop( p->pMemObjs, 0 ); + if ( p->vPis ) Vec_PtrFree( p->vPis ); + if ( p->vPos ) Vec_PtrFree( p->vPos ); + if ( p->vObjs ) Vec_PtrFree( p->vObjs ); + if ( p->vBufs ) Vec_PtrFree( p->vBufs ); + if ( p->vLevelR ) Vec_IntFree( p->vLevelR ); + if ( p->vLevels ) Vec_VecFree( p->vLevels ); + if ( p->vFlopNums) Vec_IntFree( p->vFlopNums ); + FREE( p->pName ); + FREE( p->pObjCopies ); + FREE( p->pReprs ); + FREE( p->pEquivs ); + free( p->pTable ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManCleanup( Aig_Man_t * p ) +{ + Vec_Ptr_t * vObjs; + Aig_Obj_t * pNode; + int i, nNodesOld; + nNodesOld = Aig_ManNodeNum(p); + // collect roots of dangling nodes + vObjs = Vec_PtrAlloc( 100 ); + Aig_ManForEachObj( p, pNode, i ) + if ( Aig_ObjIsNode(pNode) && Aig_ObjRefs(pNode) == 0 ) + Vec_PtrPush( vObjs, pNode ); + // recursively remove dangling nodes + Vec_PtrForEachEntry( vObjs, pNode, i ) + Aig_ObjDelete_rec( p, pNode, 1 ); + Vec_PtrFree( vObjs ); + return nNodesOld - Aig_ManNodeNum(p); +} + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManPrintStats( Aig_Man_t * p ) +{ + printf( "PI/PO/Lat = %5d/%5d/%5d ", Aig_ManPiNum(p), Aig_ManPoNum(p), Aig_ManLatchNum(p) ); + printf( "A = %7d. ", Aig_ManAndNum(p) ); + if ( Aig_ManExorNum(p) ) + printf( "X = %5d. ", Aig_ManExorNum(p) ); +// if ( Aig_ManBufNum(p) ) + printf( "B = %5d. ", Aig_ManBufNum(p) ); +// printf( "Cre = %6d. ", p->nCreated ); +// printf( "Del = %6d. ", p->nDeleted ); +// printf( "Lev = %3d. ", Aig_ManCountLevels(p) ); + printf( "Max = %7d. ", Aig_ManObjNumMax(p) ); + printf( "Lev = %3d. ", Aig_ManLevels(p) ); + if ( Aig_ManRegNum(p) ) + printf( "Lat = %5d. ", Aig_ManRegNum(p) ); + printf( "\n" ); + fflush( stdout ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigMem.c b/src/aig/aig/aigMem.c new file mode 100644 index 00000000..dab90777 --- /dev/null +++ b/src/aig/aig/aigMem.c @@ -0,0 +1,598 @@ +/**CFile**************************************************************** + + FileName [aigMem.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Memory managers.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigMem.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +struct Aig_MmFixed_t_ +{ + // information about individual entries + int nEntrySize; // the size of one entry + int nEntriesAlloc; // the total number of entries allocated + int nEntriesUsed; // the number of entries in use + int nEntriesMax; // the max number of entries in use + char * pEntriesFree; // the linked list of free entries + + // this is where the memory is stored + int nChunkSize; // the size of one chunk + int nChunksAlloc; // the maximum number of memory chunks + int nChunks; // the current number of memory chunks + char ** pChunks; // the allocated memory + + // statistics + int nMemoryUsed; // memory used in the allocated entries + int nMemoryAlloc; // memory allocated +}; + +struct Aig_MmFlex_t_ +{ + // information about individual entries + int nEntriesUsed; // the number of entries allocated + char * pCurrent; // the current pointer to free memory + char * pEnd; // the first entry outside the free memory + + // this is where the memory is stored + int nChunkSize; // the size of one chunk + int nChunksAlloc; // the maximum number of memory chunks + int nChunks; // the current number of memory chunks + char ** pChunks; // the allocated memory + + // statistics + int nMemoryUsed; // memory used in the allocated entries + int nMemoryAlloc; // memory allocated +}; + +struct Aig_MmStep_t_ +{ + int nMems; // the number of fixed memory managers employed + Aig_MmFixed_t ** pMems; // memory managers: 2^1 words, 2^2 words, etc + int nMapSize; // the size of the memory array + Aig_MmFixed_t ** pMap; // maps the number of bytes into its memory manager +}; + +#define ALLOC(type, num) ((type *) malloc(sizeof(type) * (num))) +#define FREE(obj) ((obj) ? (free((char *) (obj)), (obj) = 0) : 0) +#define REALLOC(type, obj, num) \ + ((obj) ? ((type *) realloc((char *)(obj), sizeof(type) * (num))) : \ + ((type *) malloc(sizeof(type) * (num)))) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates memory pieces of fixed size.] + + Description [The size of the chunk is computed as the minimum of + 1024 entries and 64K. Can only work with entry size at least 4 byte long.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_MmFixed_t * Aig_MmFixedStart( int nEntrySize, int nEntriesMax ) +{ + Aig_MmFixed_t * p; + + p = ALLOC( Aig_MmFixed_t, 1 ); + memset( p, 0, sizeof(Aig_MmFixed_t) ); + + p->nEntrySize = nEntrySize; + p->nEntriesAlloc = 0; + p->nEntriesUsed = 0; + p->pEntriesFree = NULL; + + p->nChunkSize = nEntriesMax / 8; + if ( p->nChunkSize < 8 ) + p->nChunkSize = 8; + + p->nChunksAlloc = 64; + p->nChunks = 0; + p->pChunks = ALLOC( char *, p->nChunksAlloc ); + + p->nMemoryUsed = 0; + p->nMemoryAlloc = 0; + return p; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmFixedStop( Aig_MmFixed_t * p, int fVerbose ) +{ + int i; + if ( p == NULL ) + return; + if ( fVerbose ) + { + printf( "Fixed memory manager: Entry = %5d. Chunk = %5d. Chunks used = %5d.\n", + p->nEntrySize, p->nChunkSize, p->nChunks ); + printf( " Entries used = %8d. Entries peak = %8d. Memory used = %8d. Memory alloc = %8d.\n", + p->nEntriesUsed, p->nEntriesMax, p->nEntrySize * p->nEntriesUsed, p->nMemoryAlloc ); + } + for ( i = 0; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + free( p->pChunks ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Aig_MmFixedEntryFetch( Aig_MmFixed_t * p ) +{ + char * pTemp; + int i; + + // check if there are still free entries + if ( p->nEntriesUsed == p->nEntriesAlloc ) + { // need to allocate more entries + assert( p->pEntriesFree == NULL ); + if ( p->nChunks == p->nChunksAlloc ) + { + p->nChunksAlloc *= 2; + p->pChunks = REALLOC( char *, p->pChunks, p->nChunksAlloc ); + } + p->pEntriesFree = ALLOC( char, p->nEntrySize * p->nChunkSize ); + p->nMemoryAlloc += p->nEntrySize * p->nChunkSize; + // transform these entries into a linked list + pTemp = p->pEntriesFree; + for ( i = 1; i < p->nChunkSize; i++ ) + { + *((char **)pTemp) = pTemp + p->nEntrySize; + pTemp += p->nEntrySize; + } + // set the last link + *((char **)pTemp) = NULL; + // add the chunk to the chunk storage + p->pChunks[ p->nChunks++ ] = p->pEntriesFree; + // add to the number of entries allocated + p->nEntriesAlloc += p->nChunkSize; + } + // incrememt the counter of used entries + p->nEntriesUsed++; + if ( p->nEntriesMax < p->nEntriesUsed ) + p->nEntriesMax = p->nEntriesUsed; + // return the first entry in the free entry list + pTemp = p->pEntriesFree; + p->pEntriesFree = *((char **)pTemp); + return pTemp; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmFixedEntryRecycle( Aig_MmFixed_t * p, char * pEntry ) +{ + // decrement the counter of used entries + p->nEntriesUsed--; + // add the entry to the linked list of free entries + *((char **)pEntry) = p->pEntriesFree; + p->pEntriesFree = pEntry; +} + +/**Function************************************************************* + + Synopsis [] + + Description [Relocates all the memory except the first chunk.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmFixedRestart( Aig_MmFixed_t * p ) +{ + int i; + char * pTemp; + if ( p->nChunks == 0 ) + return; + // deallocate all chunks except the first one + for ( i = 1; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + p->nChunks = 1; + // transform these entries into a linked list + pTemp = p->pChunks[0]; + for ( i = 1; i < p->nChunkSize; i++ ) + { + *((char **)pTemp) = pTemp + p->nEntrySize; + pTemp += p->nEntrySize; + } + // set the last link + *((char **)pTemp) = NULL; + // set the free entry list + p->pEntriesFree = p->pChunks[0]; + // set the correct statistics + p->nMemoryAlloc = p->nEntrySize * p->nChunkSize; + p->nMemoryUsed = 0; + p->nEntriesAlloc = p->nChunkSize; + p->nEntriesUsed = 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_MmFixedReadMemUsage( Aig_MmFixed_t * p ) +{ + return p->nMemoryAlloc; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_MmFixedReadMaxEntriesUsed( Aig_MmFixed_t * p ) +{ + return p->nEntriesMax; +} + + + +/**Function************************************************************* + + Synopsis [Allocates entries of flexible size.] + + Description [Can only work with entry size at least 4 byte long.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_MmFlex_t * Aig_MmFlexStart() +{ + Aig_MmFlex_t * p; + + p = ALLOC( Aig_MmFlex_t, 1 ); + memset( p, 0, sizeof(Aig_MmFlex_t) ); + + p->nEntriesUsed = 0; + p->pCurrent = NULL; + p->pEnd = NULL; + + p->nChunkSize = (1 << 18); + p->nChunksAlloc = 64; + p->nChunks = 0; + p->pChunks = ALLOC( char *, p->nChunksAlloc ); + + p->nMemoryUsed = 0; + p->nMemoryAlloc = 0; + return p; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmFlexStop( Aig_MmFlex_t * p, int fVerbose ) +{ + int i; + if ( p == NULL ) + return; + if ( fVerbose ) + { + printf( "Flexible memory manager: Chunk size = %d. Chunks used = %d.\n", + p->nChunkSize, p->nChunks ); + printf( " Entries used = %d. Memory used = %d. Memory alloc = %d.\n", + p->nEntriesUsed, p->nMemoryUsed, p->nMemoryAlloc ); + } + for ( i = 0; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + free( p->pChunks ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Aig_MmFlexEntryFetch( Aig_MmFlex_t * p, int nBytes ) +{ + char * pTemp; + // check if there are still free entries + if ( p->pCurrent == NULL || p->pCurrent + nBytes > p->pEnd ) + { // need to allocate more entries + if ( p->nChunks == p->nChunksAlloc ) + { + p->nChunksAlloc *= 2; + p->pChunks = REALLOC( char *, p->pChunks, p->nChunksAlloc ); + } + if ( nBytes > p->nChunkSize ) + { + // resize the chunk size if more memory is requested than it can give + // (ideally, this should never happen) + p->nChunkSize = 2 * nBytes; + } + p->pCurrent = ALLOC( char, p->nChunkSize ); + p->pEnd = p->pCurrent + p->nChunkSize; + p->nMemoryAlloc += p->nChunkSize; + // add the chunk to the chunk storage + p->pChunks[ p->nChunks++ ] = p->pCurrent; + } + assert( p->pCurrent + nBytes <= p->pEnd ); + // increment the counter of used entries + p->nEntriesUsed++; + // keep track of the memory used + p->nMemoryUsed += nBytes; + // return the next entry + pTemp = p->pCurrent; + p->pCurrent += nBytes; + return pTemp; +} + +/**Function************************************************************* + + Synopsis [] + + Description [Relocates all the memory except the first chunk.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmFlexRestart( Aig_MmFlex_t * p ) +{ + int i; + if ( p->nChunks == 0 ) + return; + // deallocate all chunks except the first one + for ( i = 1; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + p->nChunks = 1; + p->nMemoryAlloc = p->nChunkSize; + // transform these entries into a linked list + p->pCurrent = p->pChunks[0]; + p->pEnd = p->pCurrent + p->nChunkSize; + p->nEntriesUsed = 0; + p->nMemoryUsed = 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_MmFlexReadMemUsage( Aig_MmFlex_t * p ) +{ + return p->nMemoryUsed; +} + + + + + +/**Function************************************************************* + + Synopsis [Starts the hierarchical memory manager.] + + Description [This manager can allocate entries of any size. + Iternally they are mapped into the entries with the number of bytes + equal to the power of 2. The smallest entry size is 8 bytes. The + next one is 16 bytes etc. So, if the user requests 6 bytes, he gets + 8 byte entry. If we asks for 25 bytes, he gets 32 byte entry etc. + The input parameters "nSteps" says how many fixed memory managers + are employed internally. Calling this procedure with nSteps equal + to 10 results in 10 hierarchically arranged internal memory managers, + which can allocate up to 4096 (1Kb) entries. Requests for larger + entries are handed over to malloc() and then free()ed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_MmStep_t * Aig_MmStepStart( int nSteps ) +{ + Aig_MmStep_t * p; + int i, k; + p = ALLOC( Aig_MmStep_t, 1 ); + memset( p, 0, sizeof(Aig_MmStep_t) ); + p->nMems = nSteps; + // start the fixed memory managers + p->pMems = ALLOC( Aig_MmFixed_t *, p->nMems ); + for ( i = 0; i < p->nMems; i++ ) + p->pMems[i] = Aig_MmFixedStart( (8<<i), (1<<13) ); + // set up the mapping of the required memory size into the corresponding manager + p->nMapSize = (4<<p->nMems); + p->pMap = ALLOC( Aig_MmFixed_t *, p->nMapSize+1 ); + p->pMap[0] = NULL; + for ( k = 1; k <= 4; k++ ) + p->pMap[k] = p->pMems[0]; + for ( i = 0; i < p->nMems; i++ ) + for ( k = (4<<i)+1; k <= (8<<i); k++ ) + p->pMap[k] = p->pMems[i]; +//for ( i = 1; i < 100; i ++ ) +//printf( "%10d: size = %10d\n", i, p->pMap[i]->nEntrySize ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmStepStop( Aig_MmStep_t * p, int fVerbose ) +{ + int i; + for ( i = 0; i < p->nMems; i++ ) + Aig_MmFixedStop( p->pMems[i], fVerbose ); +// if ( p->pLargeChunks ) +// { +// for ( i = 0; i < p->nLargeChunks; i++ ) +// free( p->pLargeChunks[i] ); +// free( p->pLargeChunks ); +// } + free( p->pMems ); + free( p->pMap ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Creates the entry.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Aig_MmStepEntryFetch( Aig_MmStep_t * p, int nBytes ) +{ + if ( nBytes == 0 ) + return NULL; + if ( nBytes > p->nMapSize ) + { +// printf( "Allocating %d bytes.\n", nBytes ); +/* + if ( p->nLargeChunks == p->nLargeChunksAlloc ) + { + if ( p->nLargeChunksAlloc == 0 ) + p->nLargeChunksAlloc = 5; + p->nLargeChunksAlloc *= 2; + p->pLargeChunks = REALLOC( char *, p->pLargeChunks, p->nLargeChunksAlloc ); + } + p->pLargeChunks[ p->nLargeChunks++ ] = ALLOC( char, nBytes ); + return p->pLargeChunks[ p->nLargeChunks - 1 ]; +*/ + return ALLOC( char, nBytes ); + } + return Aig_MmFixedEntryFetch( p->pMap[nBytes] ); +} + + +/**Function************************************************************* + + Synopsis [Recycles the entry.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_MmStepEntryRecycle( Aig_MmStep_t * p, char * pEntry, int nBytes ) +{ + if ( nBytes == 0 ) + return; + if ( nBytes > p->nMapSize ) + { + free( pEntry ); + return; + } + Aig_MmFixedEntryRecycle( p->pMap[nBytes], pEntry ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_MmStepReadMemUsage( Aig_MmStep_t * p ) +{ + int i, nMemTotal = 0; + for ( i = 0; i < p->nMems; i++ ) + nMemTotal += p->pMems[i]->nMemoryAlloc; + return nMemTotal; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// diff --git a/src/aig/aig/aigMffc.c b/src/aig/aig/aigMffc.c new file mode 100644 index 00000000..47ce896d --- /dev/null +++ b/src/aig/aig/aigMffc.c @@ -0,0 +1,297 @@ +/**CFile**************************************************************** + + FileName [aigMffc.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Computation of MFFCs.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigMffc.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Dereferences the node's MFFC.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeDeref_rec( Aig_Obj_t * pNode, unsigned LevelMin ) +{ + Aig_Obj_t * pFanin; + int Counter = 0; + if ( Aig_ObjIsPi(pNode) ) + return 0; + // consider the first fanin + pFanin = Aig_ObjFanin0(pNode); + assert( pFanin->nRefs > 0 ); + if ( --pFanin->nRefs == 0 && (!LevelMin || pFanin->Level > LevelMin) ) + Counter += Aig_NodeDeref_rec( pFanin, LevelMin ); + // skip the buffer + if ( Aig_ObjIsBuf(pNode) ) + return Counter; + assert( Aig_ObjIsNode(pNode) ); + // consider the second fanin + pFanin = Aig_ObjFanin1(pNode); + assert( pFanin->nRefs > 0 ); + if ( --pFanin->nRefs == 0 && (!LevelMin || pFanin->Level > LevelMin) ) + Counter += Aig_NodeDeref_rec( pFanin, LevelMin ); + return Counter + 1; +} + +/**Function************************************************************* + + Synopsis [References the node's MFFC.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeRef_rec( Aig_Obj_t * pNode, unsigned LevelMin ) +{ + Aig_Obj_t * pFanin; + int Counter = 0; + if ( Aig_ObjIsPi(pNode) ) + return 0; + // consider the first fanin + pFanin = Aig_ObjFanin0(pNode); + if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) ) + Counter += Aig_NodeRef_rec( pFanin, LevelMin ); + // skip the buffer + if ( Aig_ObjIsBuf(pNode) ) + return Counter; + assert( Aig_ObjIsNode(pNode) ); + // consider the second fanin + pFanin = Aig_ObjFanin1(pNode); + if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) ) + Counter += Aig_NodeRef_rec( pFanin, LevelMin ); + return Counter + 1; +} + +/**Function************************************************************* + + Synopsis [References the node's MFFC.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeRefLabel_rec( Aig_Man_t * p, Aig_Obj_t * pNode, unsigned LevelMin ) +{ + Aig_Obj_t * pFanin; + int Counter = 0; + if ( Aig_ObjIsPi(pNode) ) + return 0; + Aig_ObjSetTravIdCurrent( p, pNode ); + // consider the first fanin + pFanin = Aig_ObjFanin0(pNode); + if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) ) + Counter += Aig_NodeRefLabel_rec( p, pFanin, LevelMin ); + if ( Aig_ObjIsBuf(pNode) ) + return Counter; + assert( Aig_ObjIsNode(pNode) ); + // consider the second fanin + pFanin = Aig_ObjFanin1(pNode); + if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) ) + Counter += Aig_NodeRefLabel_rec( p, pFanin, LevelMin ); + return Counter + 1; +} + +/**Function************************************************************* + + Synopsis [Collects the internal and boundary nodes in the derefed MFFC.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_NodeMffsSupp_rec( Aig_Man_t * p, Aig_Obj_t * pNode, unsigned LevelMin, Vec_Ptr_t * vSupp, int fTopmost, Aig_Obj_t * pObjSkip ) +{ + // skip visited nodes + if ( Aig_ObjIsTravIdCurrent(p, pNode) ) + return; + Aig_ObjSetTravIdCurrent(p, pNode); + // add to the new support nodes + if ( !fTopmost && pNode != pObjSkip && (Aig_ObjIsPi(pNode) || pNode->nRefs > 0 || pNode->Level <= LevelMin) ) + { + if ( vSupp ) Vec_PtrPush( vSupp, pNode ); + return; + } + assert( Aig_ObjIsNode(pNode) ); + // recur on the children + Aig_NodeMffsSupp_rec( p, Aig_ObjFanin0(pNode), LevelMin, vSupp, 0, pObjSkip ); + Aig_NodeMffsSupp_rec( p, Aig_ObjFanin1(pNode), LevelMin, vSupp, 0, pObjSkip ); +} + +/**Function************************************************************* + + Synopsis [Collects the support of depth-limited MFFC.] + + Description [Returns the number of internal nodes in the MFFC.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeMffsSupp( Aig_Man_t * p, Aig_Obj_t * pNode, int LevelMin, Vec_Ptr_t * vSupp ) +{ + int ConeSize1, ConeSize2; + assert( !Aig_IsComplement(pNode) ); + assert( Aig_ObjIsNode(pNode) ); + if ( vSupp ) Vec_PtrClear( vSupp ); + Aig_ManIncrementTravId( p ); + ConeSize1 = Aig_NodeDeref_rec( pNode, LevelMin ); + Aig_NodeMffsSupp_rec( p, pNode, LevelMin, vSupp, 1, NULL ); + ConeSize2 = Aig_NodeRef_rec( pNode, LevelMin ); + assert( ConeSize1 == ConeSize2 ); + assert( ConeSize1 > 0 ); + return ConeSize1; +} + +/**Function************************************************************* + + Synopsis [Labels the nodes in the MFFC.] + + Description [Returns the number of internal nodes in the MFFC.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeMffsLabel( Aig_Man_t * p, Aig_Obj_t * pNode ) +{ + int ConeSize1, ConeSize2; + assert( !Aig_IsComplement(pNode) ); + assert( Aig_ObjIsNode(pNode) ); + Aig_ManIncrementTravId( p ); + ConeSize1 = Aig_NodeDeref_rec( pNode, 0 ); + ConeSize2 = Aig_NodeRefLabel_rec( p, pNode, 0 ); + assert( ConeSize1 == ConeSize2 ); + assert( ConeSize1 > 0 ); + return ConeSize1; +} + +/**Function************************************************************* + + Synopsis [Labels the nodes in the MFFC.] + + Description [Returns the number of internal nodes in the MFFC.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeMffsLabelCut( Aig_Man_t * p, Aig_Obj_t * pNode, Vec_Ptr_t * vLeaves ) +{ + Aig_Obj_t * pObj; + int i, ConeSize1, ConeSize2; + assert( !Aig_IsComplement(pNode) ); + assert( Aig_ObjIsNode(pNode) ); + Aig_ManIncrementTravId( p ); + Vec_PtrForEachEntry( vLeaves, pObj, i ) + pObj->nRefs++; + ConeSize1 = Aig_NodeDeref_rec( pNode, 0 ); + ConeSize2 = Aig_NodeRefLabel_rec( p, pNode, 0 ); + Vec_PtrForEachEntry( vLeaves, pObj, i ) + pObj->nRefs--; + assert( ConeSize1 == ConeSize2 ); + assert( ConeSize1 > 0 ); + return ConeSize1; +} + +/**Function************************************************************* + + Synopsis [Expands the cut by adding the most closely related node.] + + Description [Returns 1 if the cut exists.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeMffsExtendCut( Aig_Man_t * p, Aig_Obj_t * pNode, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vResult ) +{ + Aig_Obj_t * pObj, * pLeafBest; + int i, LevelMax, ConeSize1, ConeSize2, ConeCur1, ConeCur2, ConeBest; + // dereference the current cut + LevelMax = 0; + Vec_PtrForEachEntry( vLeaves, pObj, i ) + LevelMax = AIG_MAX( LevelMax, (int)pObj->Level ); + if ( LevelMax == 0 ) + return 0; + // dereference the cut + ConeSize1 = Aig_NodeDeref_rec( pNode, 0 ); + // try expanding each node in the boundary + ConeBest = AIG_INFINITY; + pLeafBest = NULL; + Vec_PtrForEachEntry( vLeaves, pObj, i ) + { + if ( (int)pObj->Level != LevelMax ) + continue; + ConeCur1 = Aig_NodeDeref_rec( pObj, 0 ); + if ( ConeBest > ConeCur1 ) + { + ConeBest = ConeCur1; + pLeafBest = pObj; + } + ConeCur2 = Aig_NodeRef_rec( pObj, 0 ); + assert( ConeCur1 == ConeCur2 ); + } + assert( pLeafBest != NULL ); + assert( Aig_ObjIsNode(pLeafBest) ); + // deref the best leaf + ConeCur1 = Aig_NodeDeref_rec( pLeafBest, 0 ); + // collect the cut nodes + Vec_PtrClear( vResult ); + Aig_ManIncrementTravId( p ); + Aig_NodeMffsSupp_rec( p, pNode, 0, vResult, 1, pLeafBest ); + // ref the nodes + ConeCur2 = Aig_NodeRef_rec( pLeafBest, 0 ); + assert( ConeCur1 == ConeCur2 ); + // ref the original node + ConeSize2 = Aig_NodeRef_rec( pNode, 0 ); + assert( ConeSize1 == ConeSize2 ); + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigObj.c b/src/aig/aig/aigObj.c new file mode 100644 index 00000000..8323249e --- /dev/null +++ b/src/aig/aig/aigObj.c @@ -0,0 +1,416 @@ +/**CFile**************************************************************** + + FileName [aigObj.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Adding/removing objects.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigObj.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Creates primary input.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ObjCreatePi( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + pObj = Aig_ManFetchMemory( p ); + pObj->Type = AIG_OBJ_PI; + Vec_PtrPush( p->vPis, pObj ); + p->nObjs[AIG_OBJ_PI]++; + return pObj; +} + +/**Function************************************************************* + + Synopsis [Creates primary output with the given driver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ObjCreatePo( Aig_Man_t * p, Aig_Obj_t * pDriver ) +{ + Aig_Obj_t * pObj; + pObj = Aig_ManFetchMemory( p ); + pObj->Type = AIG_OBJ_PO; + Vec_PtrPush( p->vPos, pObj ); + Aig_ObjConnect( p, pObj, pDriver, NULL ); + p->nObjs[AIG_OBJ_PO]++; + return pObj; +} + + +/**Function************************************************************* + + Synopsis [Create the new node assuming it does not exist.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ObjCreate( Aig_Man_t * p, Aig_Obj_t * pGhost ) +{ + Aig_Obj_t * pObj; + assert( !Aig_IsComplement(pGhost) ); + assert( Aig_ObjIsHash(pGhost) ); + assert( pGhost == &p->Ghost ); + // get memory for the new object + pObj = Aig_ManFetchMemory( p ); + pObj->Type = pGhost->Type; + // add connections + Aig_ObjConnect( p, pObj, pGhost->pFanin0, pGhost->pFanin1 ); + // update node counters of the manager + p->nObjs[Aig_ObjType(pObj)]++; + assert( pObj->pData == NULL ); + return pObj; +} + +/**Function************************************************************* + + Synopsis [Connect the object to the fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjConnect( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFan0, Aig_Obj_t * pFan1 ) +{ + assert( !Aig_IsComplement(pObj) ); + assert( !Aig_ObjIsPi(pObj) ); + // add the first fanin + pObj->pFanin0 = pFan0; + pObj->pFanin1 = pFan1; + // increment references of the fanins and add their fanouts + if ( pFan0 != NULL ) + { + assert( Aig_ObjFanin0(pObj)->Type > 0 ); + Aig_ObjRef( Aig_ObjFanin0(pObj) ); + if ( p->pFanData ) + Aig_ObjAddFanout( p, Aig_ObjFanin0(pObj), pObj ); + } + if ( pFan1 != NULL ) + { + assert( Aig_ObjFanin1(pObj)->Type > 0 ); + Aig_ObjRef( Aig_ObjFanin1(pObj) ); + if ( p->pFanData ) + Aig_ObjAddFanout( p, Aig_ObjFanin1(pObj), pObj ); + } + // set level and phase + pObj->Level = Aig_ObjLevelNew( pObj ); + pObj->fPhase = Aig_ObjPhaseReal(pFan0) & Aig_ObjPhaseReal(pFan1); + // add the node to the structural hash table + if ( Aig_ObjIsHash(pObj) ) + Aig_TableInsert( p, pObj ); + // add the node to the dynamically updated topological order +// if ( p->pOrderData && Aig_ObjIsNode(pObj) ) +// Aig_ObjOrderInsert( p, pObj->Id ); +} + +/**Function************************************************************* + + Synopsis [Disconnects the object from the fanins.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjDisconnect( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + // remove connections + if ( pObj->pFanin0 != NULL ) + { + if ( p->pFanData ) + Aig_ObjRemoveFanout( p, Aig_ObjFanin0(pObj), pObj ); + Aig_ObjDeref(Aig_ObjFanin0(pObj)); + } + if ( pObj->pFanin1 != NULL ) + { + if ( p->pFanData ) + Aig_ObjRemoveFanout( p, Aig_ObjFanin1(pObj), pObj ); + Aig_ObjDeref(Aig_ObjFanin1(pObj)); + } + // remove the node from the structural hash table + if ( Aig_ObjIsHash(pObj) ) + Aig_TableDelete( p, pObj ); + // add the first fanin + pObj->pFanin0 = NULL; + pObj->pFanin1 = NULL; + // remove the node from the dynamically updated topological order +// if ( p->pOrderData && Aig_ObjIsNode(pObj) ) +// Aig_ObjOrderRemove( p, pObj->Id ); +} + +/**Function************************************************************* + + Synopsis [Deletes the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjDelete( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + assert( !Aig_ObjIsTerm(pObj) ); + assert( Aig_ObjRefs(pObj) == 0 ); + if ( p->pFanData && Aig_ObjIsBuf(pObj) ) + Vec_PtrRemove( p->vBufs, pObj ); + p->nObjs[pObj->Type]--; + Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL ); + Aig_ManRecycleMemory( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Deletes the MFFC of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjDelete_rec( Aig_Man_t * p, Aig_Obj_t * pObj, int fFreeTop ) +{ + Aig_Obj_t * pFanin0, * pFanin1; + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsConst1(pObj) || Aig_ObjIsPi(pObj) ) + return; + assert( !Aig_ObjIsPo(pObj) ); + pFanin0 = Aig_ObjFanin0(pObj); + pFanin1 = Aig_ObjFanin1(pObj); + Aig_ObjDisconnect( p, pObj ); + if ( fFreeTop ) + Aig_ObjDelete( p, pObj ); + if ( pFanin0 && !Aig_ObjIsNone(pFanin0) && Aig_ObjRefs(pFanin0) == 0 ) + Aig_ObjDelete_rec( p, pFanin0, 1 ); + if ( pFanin1 && !Aig_ObjIsNone(pFanin1) && Aig_ObjRefs(pFanin1) == 0 ) + Aig_ObjDelete_rec( p, pFanin1, 1 ); +} + +/**Function************************************************************* + + Synopsis [Replaces the first fanin of the node by the new fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjPatchFanin0( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFaninNew ) +{ + Aig_Obj_t * pFaninOld; + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsPo(pObj) ); + pFaninOld = Aig_ObjFanin0(pObj); + // decrement ref and remove fanout + if ( p->pFanData ) + Aig_ObjRemoveFanout( p, pFaninOld, pObj ); + Aig_ObjDeref( pFaninOld ); + // update the fanin + pObj->pFanin0 = pFaninNew; + // increment ref and add fanout + if ( p->pFanData ) + Aig_ObjAddFanout( p, Aig_ObjFanin0(pObj), pObj ); + Aig_ObjRef( Aig_ObjFanin0(pObj) ); + // get rid of old fanin + if ( !Aig_ObjIsPi(pFaninOld) && !Aig_ObjIsConst1(pFaninOld) && Aig_ObjRefs(pFaninOld) == 0 ) + Aig_ObjDelete_rec( p, pFaninOld, 1 ); +} + +/**Function************************************************************* + + Synopsis [Replaces node with a buffer fanin by a node without them.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_NodeFixBufferFanins( Aig_Man_t * p, Aig_Obj_t * pObj, int fNodesOnly, int fUpdateLevel ) +{ + Aig_Obj_t * pFanReal0, * pFanReal1, * pResult; + p->nBufFixes++; + if ( Aig_ObjIsPo(pObj) ) + { + assert( Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) ); + pFanReal0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + assert( Aig_ObjPhaseReal(Aig_ObjChild0(pObj)) == Aig_ObjPhaseReal(pFanReal0) ); + Aig_ObjPatchFanin0( p, pObj, pFanReal0 ); + return; + } + assert( Aig_ObjIsNode(pObj) ); + assert( Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) || Aig_ObjIsBuf(Aig_ObjFanin1(pObj)) ); + // get the real fanins + pFanReal0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + pFanReal1 = Aig_ObjReal_rec( Aig_ObjChild1(pObj) ); + // get the new node + if ( Aig_ObjIsNode(pObj) ) + pResult = Aig_Oper( p, pFanReal0, pFanReal1, Aig_ObjType(pObj) ); +// else if ( Aig_ObjIsLatch(pObj) ) +// pResult = Aig_Latch( p, pFanReal0, Aig_ObjInit(pObj) ); + else + assert( 0 ); + // replace the node with buffer by the node without buffer + Aig_ObjReplace( p, pObj, pResult, fNodesOnly, fUpdateLevel ); +} + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManPropagateBuffers( Aig_Man_t * p, int fNodesOnly, int fUpdateLevel ) +{ + Aig_Obj_t * pObj; + int nSteps; + assert( p->pFanData ); + for ( nSteps = 0; Vec_PtrSize(p->vBufs) > 0; nSteps++ ) + { + // get the node with a buffer fanin + for ( pObj = Vec_PtrEntryLast(p->vBufs); Aig_ObjIsBuf(pObj); pObj = Aig_ObjFanout0(p, pObj) ); + // replace this node by a node without buffer + Aig_NodeFixBufferFanins( p, pObj, fNodesOnly, fUpdateLevel ); + // stop if a cycle occured + if ( nSteps > 1000000 ) + { + printf( "Error: A cycle is encountered while propagating buffers.\n" ); + break; + } + } + return nSteps; +} + +/**Function************************************************************* + + Synopsis [Replaces one object by another.] + + Description [The new object (pObjNew) should be used instead of the old + object (pObjOld). If the new object is complemented or used, the buffer + is added and the new object remains in the manager; otherwise, the new + object is deleted.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjReplace( Aig_Man_t * p, Aig_Obj_t * pObjOld, Aig_Obj_t * pObjNew, int fNodesOnly, int fUpdateLevel ) +{ + Aig_Obj_t * pObjNewR = Aig_Regular(pObjNew); + // the object to be replaced cannot be complemented + assert( !Aig_IsComplement(pObjOld) ); + // the object to be replaced cannot be a terminal + assert( !Aig_ObjIsPi(pObjOld) && !Aig_ObjIsPo(pObjOld) ); + // the object to be used cannot be a buffer or a PO + assert( !Aig_ObjIsBuf(pObjNewR) && !Aig_ObjIsPo(pObjNewR) ); + // the object cannot be the same + assert( pObjOld != pObjNewR ); + // make sure object is not pointing to itself + assert( pObjOld != Aig_ObjFanin0(pObjNewR) ); + assert( pObjOld != Aig_ObjFanin1(pObjNewR) ); + // recursively delete the old node - but leave the object there + pObjNewR->nRefs++; + Aig_ObjDelete_rec( p, pObjOld, 0 ); + pObjNewR->nRefs--; + // if the new object is complemented or already used, create a buffer + p->nObjs[pObjOld->Type]--; + if ( Aig_IsComplement(pObjNew) || Aig_ObjRefs(pObjNew) > 0 || (fNodesOnly && !Aig_ObjIsNode(pObjNew)) ) + { + pObjOld->Type = AIG_OBJ_BUF; + Aig_ObjConnect( p, pObjOld, pObjNew, NULL ); + p->nBufReplaces++; + } + else + { + Aig_Obj_t * pFanin0 = pObjNew->pFanin0; + Aig_Obj_t * pFanin1 = pObjNew->pFanin1; + int LevelOld = pObjOld->Level; + pObjOld->Type = pObjNew->Type; + Aig_ObjDisconnect( p, pObjNew ); + Aig_ObjConnect( p, pObjOld, pFanin0, pFanin1 ); + // delete the new object + Aig_ObjDelete( p, pObjNew ); + // update levels + if ( p->pFanData ) + { + pObjOld->Level = LevelOld; + Aig_ManUpdateLevel( p, pObjOld ); + } + if ( fUpdateLevel ) + { + Aig_ObjClearReverseLevel( p, pObjOld ); + Aig_ManUpdateReverseLevel( p, pObjOld ); + } + } + p->nObjs[pObjOld->Type]++; + // store buffers if fanout is allocated + if ( p->pFanData && Aig_ObjIsBuf(pObjOld) ) + { + Vec_PtrPush( p->vBufs, pObjOld ); + p->nBufMax = AIG_MAX( p->nBufMax, Vec_PtrSize(p->vBufs) ); + Aig_ManPropagateBuffers( p, fNodesOnly, fUpdateLevel ); + } +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigOper.c b/src/aig/aig/aigOper.c new file mode 100644 index 00000000..66a6dce1 --- /dev/null +++ b/src/aig/aig/aigOper.c @@ -0,0 +1,532 @@ +/**CFile**************************************************************** + + FileName [aigOper.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [AIG operations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigOper.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// procedure to detect an EXOR gate +static inline int Aig_ObjIsExorType( Aig_Obj_t * p0, Aig_Obj_t * p1, Aig_Obj_t ** ppFan0, Aig_Obj_t ** ppFan1 ) +{ + if ( !Aig_IsComplement(p0) || !Aig_IsComplement(p1) ) + return 0; + p0 = Aig_Regular(p0); + p1 = Aig_Regular(p1); + if ( !Aig_ObjIsAnd(p0) || !Aig_ObjIsAnd(p1) ) + return 0; + if ( Aig_ObjFanin0(p0) != Aig_ObjFanin0(p1) || Aig_ObjFanin1(p0) != Aig_ObjFanin1(p1) ) + return 0; + if ( Aig_ObjFaninC0(p0) == Aig_ObjFaninC0(p1) || Aig_ObjFaninC1(p0) == Aig_ObjFaninC1(p1) ) + return 0; + *ppFan0 = Aig_ObjChild0(p0); + *ppFan1 = Aig_ObjChild1(p0); + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns i-th elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_IthVar( Aig_Man_t * p, int i ) +{ + int v; + for ( v = Aig_ManPiNum(p); v <= i; v++ ) + Aig_ObjCreatePi( p ); + assert( i < Vec_PtrSize(p->vPis) ); + return Aig_ManPi( p, i ); +} + +/**Function************************************************************* + + Synopsis [Perform one operation.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Oper( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1, Aig_Type_t Type ) +{ + if ( Type == AIG_OBJ_AND ) + return Aig_And( p, p0, p1 ); + if ( Type == AIG_OBJ_EXOR ) + return Aig_Exor( p, p0, p1 ); + assert( 0 ); + return NULL; +} + +/**Function************************************************************* + + Synopsis [Creates the canonical form of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_CanonPair_rec( Aig_Man_t * p, Aig_Obj_t * pGhost ) +{ + Aig_Obj_t * pResult, * pLat0, * pLat1; + int fCompl0, fCompl1; + Aig_Type_t Type; + assert( Aig_ObjIsNode(pGhost) ); + // consider the case when the pair is canonical + if ( !Aig_ObjIsLatch(Aig_ObjFanin0(pGhost)) || !Aig_ObjIsLatch(Aig_ObjFanin1(pGhost)) ) + { + if ( (pResult = Aig_TableLookup( p, pGhost )) ) + return pResult; + return Aig_ObjCreate( p, pGhost ); + } + /// remember the latches + pLat0 = Aig_ObjFanin0(pGhost); + pLat1 = Aig_ObjFanin1(pGhost); + // remember type and compls + Type = Aig_ObjType(pGhost); + fCompl0 = Aig_ObjFaninC0(pGhost); + fCompl1 = Aig_ObjFaninC1(pGhost); + // call recursively + pResult = Aig_Oper( p, Aig_NotCond(Aig_ObjChild0(pLat0), fCompl0), Aig_NotCond(Aig_ObjChild0(pLat1), fCompl1), Type ); + // build latch on top of this + return Aig_Latch( p, pResult, (Type == AIG_OBJ_AND)? fCompl0 & fCompl1 : fCompl0 ^ fCompl1 ); +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_And( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1 ) +{ + Aig_Obj_t * pGhost, * pResult; +// Aig_Obj_t * pFan0, * pFan1; + // check trivial cases + if ( p0 == p1 ) + return p0; + if ( p0 == Aig_Not(p1) ) + return Aig_Not(p->pConst1); + if ( Aig_Regular(p0) == p->pConst1 ) + return p0 == p->pConst1 ? p1 : Aig_Not(p->pConst1); + if ( Aig_Regular(p1) == p->pConst1 ) + return p1 == p->pConst1 ? p0 : Aig_Not(p->pConst1); + // check not so trivial cases + if ( p->fAddStrash && (Aig_ObjIsNode(Aig_Regular(p0)) || Aig_ObjIsNode(Aig_Regular(p1))) ) + { // http://fmv.jku.at/papers/BrummayerBiere-MEMICS06.pdf + Aig_Obj_t * pFanA, * pFanB, * pFanC, * pFanD; + pFanA = Aig_ObjChild0(Aig_Regular(p0)); + pFanB = Aig_ObjChild1(Aig_Regular(p0)); + pFanC = Aig_ObjChild0(Aig_Regular(p1)); + pFanD = Aig_ObjChild1(Aig_Regular(p1)); + if ( Aig_IsComplement(p0) ) + { + if ( pFanA == Aig_Not(p1) || pFanB == Aig_Not(p1) ) + return p1; + if ( pFanB == p1 ) + return Aig_And( p, Aig_Not(pFanA), pFanB ); + if ( pFanA == p1 ) + return Aig_And( p, Aig_Not(pFanB), pFanA ); + } + else + { + if ( pFanA == Aig_Not(p1) || pFanB == Aig_Not(p1) ) + return Aig_Not(p->pConst1); + if ( pFanA == p1 || pFanB == p1 ) + return p0; + } + if ( Aig_IsComplement(p1) ) + { + if ( pFanC == Aig_Not(p0) || pFanD == Aig_Not(p0) ) + return p0; + if ( pFanD == p0 ) + return Aig_And( p, Aig_Not(pFanC), pFanD ); + if ( pFanC == p0 ) + return Aig_And( p, Aig_Not(pFanD), pFanC ); + } + else + { + if ( pFanC == Aig_Not(p0) || pFanD == Aig_Not(p0) ) + return Aig_Not(p->pConst1); + if ( pFanC == p0 || pFanD == p0 ) + return p1; + } + if ( !Aig_IsComplement(p0) && !Aig_IsComplement(p1) ) + { + if ( pFanA == Aig_Not(pFanC) || pFanA == Aig_Not(pFanD) || pFanB == Aig_Not(pFanC) || pFanB == Aig_Not(pFanD) ) + return Aig_Not(p->pConst1); + if ( pFanA == pFanC || pFanB == pFanC ) + return Aig_And( p, p0, pFanD ); + if ( pFanB == pFanC || pFanB == pFanD ) + return Aig_And( p, pFanA, p1 ); + if ( pFanA == pFanD || pFanB == pFanD ) + return Aig_And( p, p0, pFanC ); + if ( pFanA == pFanC || pFanA == pFanD ) + return Aig_And( p, pFanB, p1 ); + } + else if ( Aig_IsComplement(p0) && !Aig_IsComplement(p1) ) + { + if ( pFanA == Aig_Not(pFanC) || pFanA == Aig_Not(pFanD) || pFanB == Aig_Not(pFanC) || pFanB == Aig_Not(pFanD) ) + return p1; + if ( pFanB == pFanC || pFanB == pFanD ) + return Aig_And( p, Aig_Not(pFanA), p1 ); + if ( pFanA == pFanC || pFanA == pFanD ) + return Aig_And( p, Aig_Not(pFanB), p1 ); + } + else if ( !Aig_IsComplement(p0) && Aig_IsComplement(p1) ) + { + if ( pFanC == Aig_Not(pFanA) || pFanC == Aig_Not(pFanB) || pFanD == Aig_Not(pFanA) || pFanD == Aig_Not(pFanB) ) + return p0; + if ( pFanD == pFanA || pFanD == pFanB ) + return Aig_And( p, Aig_Not(pFanC), p0 ); + if ( pFanC == pFanA || pFanC == pFanB ) + return Aig_And( p, Aig_Not(pFanD), p0 ); + } + else // if ( Aig_IsComplement(p0) && Aig_IsComplement(p1) ) + { + if ( pFanA == pFanD && pFanB == Aig_Not(pFanC) ) + return Aig_Not(pFanA); + if ( pFanB == pFanC && pFanA == Aig_Not(pFanD) ) + return Aig_Not(pFanB); + if ( pFanA == pFanC && pFanB == Aig_Not(pFanD) ) + return Aig_Not(pFanA); + if ( pFanB == pFanD && pFanA == Aig_Not(pFanC) ) + return Aig_Not(pFanB); + } + } + // check if it can be an EXOR gate +// if ( Aig_ObjIsExorType( p0, p1, &pFan0, &pFan1 ) ) +// return Aig_Exor( p, pFan0, pFan1 ); + pGhost = Aig_ObjCreateGhost( p, p0, p1, AIG_OBJ_AND ); + pResult = Aig_CanonPair_rec( p, pGhost ); + return pResult; +} + +/**Function************************************************************* + + Synopsis [Creates the canonical form of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Latch( Aig_Man_t * p, Aig_Obj_t * pObj, int fInitOne ) +{ + Aig_Obj_t * pGhost, * pResult; + pGhost = Aig_ObjCreateGhost( p, Aig_NotCond(pObj, fInitOne), NULL, AIG_OBJ_LATCH ); + pResult = Aig_TableLookup( p, pGhost ); + if ( pResult == NULL ) + pResult = Aig_ObjCreate( p, pGhost ); + return Aig_NotCond( pResult, fInitOne ); +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Exor( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1 ) +{ +/* + Aig_Obj_t * pGhost, * pResult; + // check trivial cases + if ( p0 == p1 ) + return Aig_Not(p->pConst1); + if ( p0 == Aig_Not(p1) ) + return p->pConst1; + if ( Aig_Regular(p0) == p->pConst1 ) + return Aig_NotCond( p1, p0 == p->pConst1 ); + if ( Aig_Regular(p1) == p->pConst1 ) + return Aig_NotCond( p0, p1 == p->pConst1 ); + // check the table + pGhost = Aig_ObjCreateGhost( p, p0, p1, AIG_OBJ_EXOR ); + if ( pResult = Aig_TableLookup( p, pGhost ) ) + return pResult; + return Aig_ObjCreate( p, pGhost ); +*/ + return Aig_Or( p, Aig_And(p, p0, Aig_Not(p1)), Aig_And(p, Aig_Not(p0), p1) ); +} + +/**Function************************************************************* + + Synopsis [Implements Boolean OR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Or( Aig_Man_t * p, Aig_Obj_t * p0, Aig_Obj_t * p1 ) +{ + return Aig_Not( Aig_And( p, Aig_Not(p0), Aig_Not(p1) ) ); +} + +/**Function************************************************************* + + Synopsis [Implements ITE operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Mux( Aig_Man_t * p, Aig_Obj_t * pC, Aig_Obj_t * p1, Aig_Obj_t * p0 ) +{ +/* + Aig_Obj_t * pTempA1, * pTempA2, * pTempB1, * pTempB2, * pTemp; + int Count0, Count1; + // consider trivial cases + if ( p0 == Aig_Not(p1) ) + return Aig_Exor( p, pC, p0 ); + // other cases can be added + // implement the first MUX (F = C * x1 + C' * x0) + + // check for constants here!!! + + pTempA1 = Aig_TableLookup( p, Aig_ObjCreateGhost(p, pC, p1, AIG_OBJ_AND) ); + pTempA2 = Aig_TableLookup( p, Aig_ObjCreateGhost(p, Aig_Not(pC), p0, AIG_OBJ_AND) ); + if ( pTempA1 && pTempA2 ) + { + pTemp = Aig_TableLookup( p, Aig_ObjCreateGhost(p, Aig_Not(pTempA1), Aig_Not(pTempA2), AIG_OBJ_AND) ); + if ( pTemp ) return Aig_Not(pTemp); + } + Count0 = (pTempA1 != NULL) + (pTempA2 != NULL); + // implement the second MUX (F' = C * x1' + C' * x0') + pTempB1 = Aig_TableLookup( p, Aig_ObjCreateGhost(p, pC, Aig_Not(p1), AIG_OBJ_AND) ); + pTempB2 = Aig_TableLookup( p, Aig_ObjCreateGhost(p, Aig_Not(pC), Aig_Not(p0), AIG_OBJ_AND) ); + if ( pTempB1 && pTempB2 ) + { + pTemp = Aig_TableLookup( p, Aig_ObjCreateGhost(p, Aig_Not(pTempB1), Aig_Not(pTempB2), AIG_OBJ_AND) ); + if ( pTemp ) return pTemp; + } + Count1 = (pTempB1 != NULL) + (pTempB2 != NULL); + // compare and decide which one to implement + if ( Count0 >= Count1 ) + { + pTempA1 = pTempA1? pTempA1 : Aig_And(p, pC, p1); + pTempA2 = pTempA2? pTempA2 : Aig_And(p, Aig_Not(pC), p0); + return Aig_Or( p, pTempA1, pTempA2 ); + } + pTempB1 = pTempB1? pTempB1 : Aig_And(p, pC, Aig_Not(p1)); + pTempB2 = pTempB2? pTempB2 : Aig_And(p, Aig_Not(pC), Aig_Not(p0)); + return Aig_Not( Aig_Or( p, pTempB1, pTempB2 ) ); +*/ + return Aig_Or( p, Aig_And(p, pC, p1), Aig_And(p, Aig_Not(pC), p0) ); +} + +/**Function************************************************************* + + Synopsis [Implements ITE operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Maj( Aig_Man_t * p, Aig_Obj_t * pA, Aig_Obj_t * pB, Aig_Obj_t * pC ) +{ + return Aig_Or( p, Aig_Or(p, Aig_And(p, pA, pB), Aig_And(p, pA, pC)), Aig_And(p, pB, pC) ); +} + +/**Function************************************************************* + + Synopsis [Constructs the well-balanced tree of gates.] + + Description [Disregards levels and possible logic sharing.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Multi_rec( Aig_Man_t * p, Aig_Obj_t ** ppObjs, int nObjs, Aig_Type_t Type ) +{ + Aig_Obj_t * pObj1, * pObj2; + if ( nObjs == 1 ) + return ppObjs[0]; + pObj1 = Aig_Multi_rec( p, ppObjs, nObjs/2, Type ); + pObj2 = Aig_Multi_rec( p, ppObjs + nObjs/2, nObjs - nObjs/2, Type ); + return Aig_Oper( p, pObj1, pObj2, Type ); +} + +/**Function************************************************************* + + Synopsis [Old code.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Multi( Aig_Man_t * p, Aig_Obj_t ** pArgs, int nArgs, Aig_Type_t Type ) +{ + assert( Type == AIG_OBJ_AND || Type == AIG_OBJ_EXOR ); + assert( nArgs > 0 ); + return Aig_Multi_rec( p, pArgs, nArgs, Type ); +} + +/**Function************************************************************* + + Synopsis [Implements the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_Miter( Aig_Man_t * p, Vec_Ptr_t * vPairs ) +{ + int i; + assert( vPairs->nSize > 0 ); + assert( vPairs->nSize % 2 == 0 ); + for ( i = 0; i < vPairs->nSize; i += 2 ) + vPairs->pArray[i/2] = Aig_Not( Aig_Exor( p, vPairs->pArray[i], vPairs->pArray[i+1] ) ); + vPairs->nSize = vPairs->nSize/2; + return Aig_Not( Aig_Multi_rec( p, (Aig_Obj_t **)vPairs->pArray, vPairs->nSize, AIG_OBJ_AND ) ); +} + +/**Function************************************************************* + + Synopsis [Implements the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_MiterTwo( Aig_Man_t * p, Vec_Ptr_t * vNodes1, Vec_Ptr_t * vNodes2 ) +{ + int i; + assert( vNodes1->nSize > 0 && vNodes1->nSize > 0 ); + assert( vNodes1->nSize == vNodes2->nSize ); + for ( i = 0; i < vNodes1->nSize; i++ ) + vNodes1->pArray[i] = Aig_Not( Aig_Exor( p, vNodes1->pArray[i], vNodes2->pArray[i] ) ); + return Aig_Not( Aig_Multi_rec( p, (Aig_Obj_t **)vNodes1->pArray, vNodes1->nSize, AIG_OBJ_AND ) ); +} + +/**Function************************************************************* + + Synopsis [Creates AND function with nVars inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_CreateAnd( Aig_Man_t * p, int nVars ) +{ + Aig_Obj_t * pFunc; + int i; + pFunc = Aig_ManConst1( p ); + for ( i = 0; i < nVars; i++ ) + pFunc = Aig_And( p, pFunc, Aig_IthVar(p, i) ); + return pFunc; +} + +/**Function************************************************************* + + Synopsis [Creates AND function with nVars inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_CreateOr( Aig_Man_t * p, int nVars ) +{ + Aig_Obj_t * pFunc; + int i; + pFunc = Aig_ManConst0( p ); + for ( i = 0; i < nVars; i++ ) + pFunc = Aig_Or( p, pFunc, Aig_IthVar(p, i) ); + return pFunc; +} + +/**Function************************************************************* + + Synopsis [Creates AND function with nVars inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_CreateExor( Aig_Man_t * p, int nVars ) +{ + Aig_Obj_t * pFunc; + int i; + pFunc = Aig_ManConst0( p ); + for ( i = 0; i < nVars; i++ ) + pFunc = Aig_Exor( p, pFunc, Aig_IthVar(p, i) ); + return pFunc; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigOrder.c b/src/aig/aig/aigOrder.c new file mode 100644 index 00000000..62aeca6e --- /dev/null +++ b/src/aig/aig/aigOrder.c @@ -0,0 +1,171 @@ +/**CFile**************************************************************** + + FileName [aigOrder.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Dynamically updated topological order.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigOrder.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Initializes the order datastructure.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManOrderStart( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + assert( Aig_ManBufNum(p) == 0 ); + // allocate order datastructure + assert( p->pOrderData == NULL ); + p->nOrderAlloc = 2 * Aig_ManObjNumMax(p); + if ( p->nOrderAlloc < (1<<12) ) + p->nOrderAlloc = (1<<12); + p->pOrderData = ALLOC( unsigned, 2 * p->nOrderAlloc ); + memset( p->pOrderData, 0xFF, sizeof(unsigned) * 2 * p->nOrderAlloc ); + // add the constant node + p->pOrderData[0] = p->pOrderData[1] = 0; + p->iPrev = p->iNext = 0; + // add the internal nodes + Aig_ManForEachNode( p, pObj, i ) + Aig_ObjOrderInsert( p, pObj->Id ); +} + +/**Function************************************************************* + + Synopsis [Deletes the order datastructure.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManOrderStop( Aig_Man_t * p ) +{ + assert( p->pOrderData ); + FREE( p->pOrderData ); + p->nOrderAlloc = 0; + p->iPrev = p->iNext = 0; +} + +/**Function************************************************************* + + Synopsis [Inserts an entry before iNext.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjOrderInsert( Aig_Man_t * p, int ObjId ) +{ + int iPrev; + assert( ObjId != 0 ); + assert( Aig_ObjIsNode( Aig_ManObj(p, ObjId) ) ); + if ( ObjId >= p->nOrderAlloc ) + { + int nOrderAlloc = 2 * ObjId; + p->pOrderData = REALLOC( unsigned, p->pOrderData, 2 * nOrderAlloc ); + memset( p->pOrderData + 2 * p->nOrderAlloc, 0xFF, sizeof(unsigned) * 2 * (nOrderAlloc - p->nOrderAlloc) ); + p->nOrderAlloc = nOrderAlloc; + } + assert( p->pOrderData[2*ObjId] == 0xFFFFFFFF ); // prev + assert( p->pOrderData[2*ObjId+1] == 0xFFFFFFFF ); // next + iPrev = p->pOrderData[2*p->iNext]; + assert( p->pOrderData[2*iPrev+1] == (unsigned)p->iNext ); + p->pOrderData[2*ObjId] = iPrev; + p->pOrderData[2*iPrev+1] = ObjId; + p->pOrderData[2*p->iNext] = ObjId; + p->pOrderData[2*ObjId+1] = p->iNext; + p->nAndTotal++; +} + +/**Function************************************************************* + + Synopsis [Removes the entry.] + + Description [If iPrev is removed, it slides backward. + If iNext is removed, it slides forward.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjOrderRemove( Aig_Man_t * p, int ObjId ) +{ + int iPrev, iNext; + assert( ObjId != 0 ); + assert( Aig_ObjIsNode( Aig_ManObj(p, ObjId) ) ); + iPrev = p->pOrderData[2*ObjId]; + iNext = p->pOrderData[2*ObjId+1]; + p->pOrderData[2*ObjId] = 0xFFFFFFFF; + p->pOrderData[2*ObjId+1] = 0xFFFFFFFF; + p->pOrderData[2*iNext] = iPrev; + p->pOrderData[2*iPrev+1] = iNext; + if ( p->iPrev == ObjId ) + { + p->nAndPrev--; + p->iPrev = iPrev; + } + if ( p->iNext == ObjId ) + p->iNext = iNext; + p->nAndTotal--; +} + +/**Function************************************************************* + + Synopsis [Advances the order forward.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjOrderAdvance( Aig_Man_t * p ) +{ + assert( p->pOrderData ); + assert( p->pOrderData[2*p->iPrev+1] == (unsigned)p->iNext ); + p->iPrev = p->iNext; + p->nAndPrev++; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigPart.c b/src/aig/aig/aigPart.c new file mode 100644 index 00000000..de13653c --- /dev/null +++ b/src/aig/aig/aigPart.c @@ -0,0 +1,992 @@ +/**CFile**************************************************************** + + FileName [aigPart.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [AIG partitioning package.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigPart.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Part_Man_t_ Part_Man_t; +struct Part_Man_t_ +{ + int nChunkSize; // the size of one chunk of memory (~1 Mb) + int nStepSize; // the step size in saving memory (~64 bytes) + char * pFreeBuf; // the pointer to free memory + int nFreeSize; // the size of remaining free memory + Vec_Ptr_t * vMemory; // the memory allocated + Vec_Ptr_t * vFree; // the vector of free pieces of memory +}; + +typedef struct Part_One_t_ Part_One_t; +struct Part_One_t_ +{ + int nRefs; // the number of references + int nOuts; // the number of outputs + int nOutsAlloc; // the array size + int pOuts[0]; // the array of outputs +}; + +static inline int Part_SizeType( int nSize, int nStepSize ) { return nSize / nStepSize + ((nSize % nStepSize) > 0); } +static inline char * Part_OneNext( char * pPart ) { return *((char **)pPart); } +static inline void Part_OneSetNext( char * pPart, char * pNext ) { *((char **)pPart) = pNext; } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Start the memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Part_Man_t * Part_ManStart( int nChunkSize, int nStepSize ) +{ + Part_Man_t * p; + p = ALLOC( Part_Man_t, 1 ); + memset( p, 0, sizeof(Part_Man_t) ); + p->nChunkSize = nChunkSize; + p->nStepSize = nStepSize; + p->vMemory = Vec_PtrAlloc( 1000 ); + p->vFree = Vec_PtrAlloc( 1000 ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Part_ManStop( Part_Man_t * p ) +{ + void * pMemory; + int i; + Vec_PtrForEachEntry( p->vMemory, pMemory, i ) + free( pMemory ); + Vec_PtrFree( p->vMemory ); + Vec_PtrFree( p->vFree ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Fetches the memory entry of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Part_ManFetch( Part_Man_t * p, int nSize ) +{ + int Type, nSizeReal; + char * pMemory; + assert( nSize > 0 ); + Type = Part_SizeType( nSize, p->nStepSize ); + Vec_PtrFillExtra( p->vFree, Type + 1, NULL ); + if ( (pMemory = Vec_PtrEntry( p->vFree, Type )) ) + { + Vec_PtrWriteEntry( p->vFree, Type, Part_OneNext(pMemory) ); + return pMemory; + } + nSizeReal = p->nStepSize * Type; + if ( p->nFreeSize < nSizeReal ) + { + p->pFreeBuf = ALLOC( char, p->nChunkSize ); + p->nFreeSize = p->nChunkSize; + Vec_PtrPush( p->vMemory, p->pFreeBuf ); + } + assert( p->nFreeSize >= nSizeReal ); + pMemory = p->pFreeBuf; + p->pFreeBuf += nSizeReal; + p->nFreeSize -= nSizeReal; + return pMemory; +} + +/**Function************************************************************* + + Synopsis [Recycles the memory entry of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Part_ManRecycle( Part_Man_t * p, char * pMemory, int nSize ) +{ + int Type; + Type = Part_SizeType( nSize, p->nStepSize ); + Vec_PtrFillExtra( p->vFree, Type + 1, NULL ); + Part_OneSetNext( pMemory, Vec_PtrEntry(p->vFree, Type) ); + Vec_PtrWriteEntry( p->vFree, Type, pMemory ); +} + +/**Function************************************************************* + + Synopsis [Fetches the memory entry of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Part_One_t * Part_ManFetchEntry( Part_Man_t * p, int nWords, int nRefs ) +{ + Part_One_t * pPart; + pPart = (Part_One_t *)Part_ManFetch( p, sizeof(Part_One_t) + sizeof(int) * nWords ); + pPart->nRefs = nRefs; + pPart->nOuts = 0; + pPart->nOutsAlloc = nWords; + return pPart; +} + +/**Function************************************************************* + + Synopsis [Recycles the memory entry of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Part_ManRecycleEntry( Part_Man_t * p, Part_One_t * pEntry ) +{ + assert( pEntry->nOuts <= pEntry->nOutsAlloc ); + assert( pEntry->nOuts >= pEntry->nOutsAlloc/2 ); + Part_ManRecycle( p, (char *)pEntry, sizeof(Part_One_t) + sizeof(int) * pEntry->nOutsAlloc ); +} + +/**Function************************************************************* + + Synopsis [Merges two entries.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Part_One_t * Part_ManMergeEntry( Part_Man_t * pMan, Part_One_t * p1, Part_One_t * p2, int nRefs ) +{ + Part_One_t * p = Part_ManFetchEntry( pMan, p1->nOuts + p2->nOuts, nRefs ); + int * pBeg1 = p1->pOuts; + int * pBeg2 = p2->pOuts; + int * pBeg = p->pOuts; + int * pEnd1 = p1->pOuts + p1->nOuts; + int * pEnd2 = p2->pOuts + p2->nOuts; + while ( pBeg1 < pEnd1 && pBeg2 < pEnd2 ) + { + if ( *pBeg1 == *pBeg2 ) + *pBeg++ = *pBeg1++, pBeg2++; + else if ( *pBeg1 < *pBeg2 ) + *pBeg++ = *pBeg1++; + else + *pBeg++ = *pBeg2++; + } + while ( pBeg1 < pEnd1 ) + *pBeg++ = *pBeg1++; + while ( pBeg2 < pEnd2 ) + *pBeg++ = *pBeg2++; + p->nOuts = pBeg - p->pOuts; + assert( p->nOuts <= p->nOutsAlloc ); + assert( p->nOuts >= p1->nOuts ); + assert( p->nOuts >= p2->nOuts ); + return p; +} + +/**Function************************************************************* + + Synopsis [Tranfers the entry.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Part_ManTransferEntry( Part_One_t * p ) +{ + Vec_Int_t * vSupp; + int i; + vSupp = Vec_IntAlloc( p->nOuts ); + for ( i = 0; i < p->nOuts; i++ ) + Vec_IntPush( vSupp, p->pOuts[i] ); + return vSupp; +} + +/**Function************************************************************* + + Synopsis [Computes supports of the POs in the multi-output AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManSupports( Aig_Man_t * pMan ) +{ + Vec_Ptr_t * vSupports; + Vec_Int_t * vSupp; + Part_Man_t * p; + Part_One_t * pPart0, * pPart1; + Aig_Obj_t * pObj; + int i; + // set the number of PIs/POs + Aig_ManForEachPi( pMan, pObj, i ) + pObj->pNext = (Aig_Obj_t *)(long)i; + Aig_ManForEachPo( pMan, pObj, i ) + pObj->pNext = (Aig_Obj_t *)(long)i; + // start the support computation manager + p = Part_ManStart( 1 << 20, 1 << 6 ); + // consider objects in the topological order + vSupports = Vec_PtrAlloc( Aig_ManPoNum(pMan) ); + Aig_ManCleanData(pMan); + Aig_ManForEachObj( pMan, pObj, i ) + { + if ( Aig_ObjIsNode(pObj) ) + { + pPart0 = Aig_ObjFanin0(pObj)->pData; + pPart1 = Aig_ObjFanin1(pObj)->pData; + pObj->pData = Part_ManMergeEntry( p, pPart0, pPart1, pObj->nRefs ); + assert( pPart0->nRefs > 0 ); + if ( --pPart0->nRefs == 0 ) + Part_ManRecycleEntry( p, pPart0 ); + assert( pPart1->nRefs > 0 ); + if ( --pPart1->nRefs == 0 ) + Part_ManRecycleEntry( p, pPart1 ); + continue; + } + if ( Aig_ObjIsPo(pObj) ) + { + pPart0 = Aig_ObjFanin0(pObj)->pData; + vSupp = Part_ManTransferEntry(pPart0); + Vec_IntPush( vSupp, (int)(long)pObj->pNext ); + Vec_PtrPush( vSupports, vSupp ); + assert( pPart0->nRefs > 0 ); + if ( --pPart0->nRefs == 0 ) + Part_ManRecycleEntry( p, pPart0 ); + continue; + } + if ( Aig_ObjIsPi(pObj) ) + { + if ( pObj->nRefs ) + { + pPart0 = Part_ManFetchEntry( p, 1, pObj->nRefs ); + pPart0->pOuts[ pPart0->nOuts++ ] = (int)(long)pObj->pNext; + pObj->pData = pPart0; + } + continue; + } + if ( Aig_ObjIsConst1(pObj) ) + { + if ( pObj->nRefs ) + pObj->pData = Part_ManFetchEntry( p, 0, pObj->nRefs ); + continue; + } + assert( 0 ); + } +//printf( "Memory usage = %d Mb.\n", Vec_PtrSize(p->vMemory) * p->nChunkSize / (1<<20) ); + Part_ManStop( p ); + // sort supports by size + Vec_VecSort( (Vec_Vec_t *)vSupports, 1 ); + // clear the number of PIs/POs + Aig_ManForEachPi( pMan, pObj, i ) + pObj->pNext = NULL; + Aig_ManForEachPo( pMan, pObj, i ) + pObj->pNext = NULL; +/* + Aig_ManForEachPo( pMan, pObj, i ) + printf( "%d ", Vec_IntSize( (Vec_Int_t *)Vec_VecEntry(vSupports, i) ) ); + printf( "\n" ); +*/ + return vSupports; +} + +/**Function************************************************************* + + Synopsis [Start char-bases support representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Aig_ManSuppCharStart( Vec_Int_t * vOne, int nPis ) +{ + unsigned * pBuffer; + int i, Entry; + int nWords = Aig_BitWordNum(nPis); + pBuffer = ALLOC( unsigned, nWords ); + memset( pBuffer, 0, sizeof(unsigned) * nWords ); + Vec_IntForEachEntry( vOne, Entry, i ) + { + assert( Entry < nPis ); + Aig_InfoSetBit( pBuffer, Entry ); + } + return pBuffer; +} + +/**Function************************************************************* + + Synopsis [Add to char-bases support representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManSuppCharAdd( unsigned * pBuffer, Vec_Int_t * vOne, int nPis ) +{ + int i, Entry; + Vec_IntForEachEntry( vOne, Entry, i ) + { + assert( Entry < nPis ); + Aig_InfoSetBit( pBuffer, Entry ); + } +} + +/**Function************************************************************* + + Synopsis [Find the common variables using char-bases support representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManSuppCharCommon( unsigned * pBuffer, Vec_Int_t * vOne ) +{ + int i, Entry, nCommon = 0; + Vec_IntForEachEntry( vOne, Entry, i ) + nCommon += Aig_InfoHasBit(pBuffer, Entry); + return nCommon; +} + +/**Function************************************************************* + + Synopsis [Find the best partition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManPartitionSmartFindPart( Vec_Ptr_t * vPartSuppsAll, Vec_Ptr_t * vPartsAll, Vec_Ptr_t * vPartSuppsBit, int nSuppSizeLimit, Vec_Int_t * vOne ) +{ + Vec_Int_t * vPartSupp;//, * vPart; + int Attract, Repulse, Value, ValueBest; + int i, nCommon, iBest; + iBest = -1; + ValueBest = 0; + Vec_PtrForEachEntry( vPartSuppsAll, vPartSupp, i ) + { +// vPart = Vec_PtrEntry( vPartsAll, i ); +// if ( nSuppSizeLimit > 0 && Vec_IntSize(vPart) >= nSuppSizeLimit ) +// continue; +// nCommon = Vec_IntTwoCountCommon( vPartSupp, vOne ); + nCommon = Aig_ManSuppCharCommon( Vec_PtrEntry(vPartSuppsBit, i), vOne ); + if ( nCommon == 0 ) + continue; + if ( nCommon == Vec_IntSize(vOne) ) + return i; + // skip partitions whose size exceeds the limit + if ( nSuppSizeLimit > 0 && Vec_IntSize(vPartSupp) >= 2 * nSuppSizeLimit ) + continue; + Attract = 1000 * nCommon / Vec_IntSize(vOne); + if ( Vec_IntSize(vPartSupp) < 100 ) + Repulse = 1; + else + Repulse = 1+Aig_Base2Log(Vec_IntSize(vPartSupp)-100); + Value = Attract/Repulse; + if ( ValueBest < Value ) + { + ValueBest = Value; + iBest = i; + } + } + if ( ValueBest < 75 ) + return -1; + return iBest; +} + +/**Function************************************************************* + + Synopsis [Perform the smart partitioning.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManPartitionPrint( Aig_Man_t * p, Vec_Ptr_t * vPartsAll, Vec_Ptr_t * vPartSuppsAll ) +{ + Vec_Int_t * vOne; + int i, nOutputs, Counter; + + Counter = 0; + Vec_PtrForEachEntry( vPartSuppsAll, vOne, i ) + { + nOutputs = Vec_IntSize(Vec_PtrEntry(vPartsAll, i)); + printf( "%d=(%d,%d) ", i, Vec_IntSize(vOne), nOutputs ); + Counter += nOutputs; + if ( i == Vec_PtrSize(vPartsAll) - 1 ) + break; + } + assert( Counter == Aig_ManPoNum(p) ); +// printf( "\nTotal = %d. Outputs = %d.\n", Counter, Aig_ManPoNum(p) ); +} + +/**Function************************************************************* + + Synopsis [Perform the smart partitioning.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManPartitionCompact( Vec_Ptr_t * vPartsAll, Vec_Ptr_t * vPartSuppsAll, int nSuppSizeLimit ) +{ + Vec_Int_t * vOne, * vPart, * vPartSupp, * vTemp; + int i, iPart; + + if ( nSuppSizeLimit == 0 ) + nSuppSizeLimit = 200; + + // pack smaller partitions into larger blocks + iPart = 0; + vPart = vPartSupp = NULL; + Vec_PtrForEachEntry( vPartSuppsAll, vOne, i ) + { + if ( Vec_IntSize(vOne) < nSuppSizeLimit ) + { + if ( vPartSupp == NULL ) + { + assert( vPart == NULL ); + vPartSupp = Vec_IntDup(vOne); + vPart = Vec_PtrEntry(vPartsAll, i); + } + else + { + vPartSupp = Vec_IntTwoMerge( vTemp = vPartSupp, vOne ); + Vec_IntFree( vTemp ); + vPart = Vec_IntTwoMerge( vTemp = vPart, Vec_PtrEntry(vPartsAll, i) ); + Vec_IntFree( vTemp ); + Vec_IntFree( Vec_PtrEntry(vPartsAll, i) ); + } + if ( Vec_IntSize(vPartSupp) < nSuppSizeLimit ) + continue; + } + else + vPart = Vec_PtrEntry(vPartsAll, i); + // add the partition + Vec_PtrWriteEntry( vPartsAll, iPart, vPart ); + vPart = NULL; + if ( vPartSupp ) + { + Vec_IntFree( Vec_PtrEntry(vPartSuppsAll, iPart) ); + Vec_PtrWriteEntry( vPartSuppsAll, iPart, vPartSupp ); + vPartSupp = NULL; + } + iPart++; + } + // add the last one + if ( vPart ) + { + Vec_PtrWriteEntry( vPartsAll, iPart, vPart ); + vPart = NULL; + + assert( vPartSupp != NULL ); + Vec_IntFree( Vec_PtrEntry(vPartSuppsAll, iPart) ); + Vec_PtrWriteEntry( vPartSuppsAll, iPart, vPartSupp ); + vPartSupp = NULL; + iPart++; + } + Vec_PtrShrink( vPartsAll, iPart ); + Vec_PtrShrink( vPartsAll, iPart ); +} + +/**Function************************************************************* + + Synopsis [Perform the smart partitioning.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManPartitionSmart( Aig_Man_t * p, int nSuppSizeLimit, int fVerbose, Vec_Ptr_t ** pvPartSupps ) +{ + Vec_Ptr_t * vPartSuppsBit; + Vec_Ptr_t * vSupports, * vPartsAll, * vPartsAll2, * vPartSuppsAll;//, * vPartPtr; + Vec_Int_t * vOne, * vPart, * vPartSupp, * vTemp; + int i, iPart, iOut, clk; + + // compute the supports for all outputs +clk = clock(); + vSupports = Aig_ManSupports( p ); +if ( fVerbose ) +{ +PRT( "Supps", clock() - clk ); +} + // start char-based support representation + vPartSuppsBit = Vec_PtrAlloc( 1000 ); + + // create partitions +clk = clock(); + vPartsAll = Vec_PtrAlloc( 256 ); + vPartSuppsAll = Vec_PtrAlloc( 256 ); + Vec_PtrForEachEntry( vSupports, vOne, i ) + { + // get the output number + iOut = Vec_IntPop(vOne); + // find closely matching part + iPart = Aig_ManPartitionSmartFindPart( vPartSuppsAll, vPartsAll, vPartSuppsBit, nSuppSizeLimit, vOne ); + if ( iPart == -1 ) + { + // create new partition + vPart = Vec_IntAlloc( 32 ); + Vec_IntPush( vPart, iOut ); + // create new partition support + vPartSupp = Vec_IntDup( vOne ); + // add this partition and its support + Vec_PtrPush( vPartsAll, vPart ); + Vec_PtrPush( vPartSuppsAll, vPartSupp ); + + Vec_PtrPush( vPartSuppsBit, Aig_ManSuppCharStart(vOne, Aig_ManPiNum(p)) ); + } + else + { + // add output to this partition + vPart = Vec_PtrEntry( vPartsAll, iPart ); + Vec_IntPush( vPart, iOut ); + // merge supports + vPartSupp = Vec_PtrEntry( vPartSuppsAll, iPart ); + vPartSupp = Vec_IntTwoMerge( vTemp = vPartSupp, vOne ); + Vec_IntFree( vTemp ); + // reinsert new support + Vec_PtrWriteEntry( vPartSuppsAll, iPart, vPartSupp ); + + Aig_ManSuppCharAdd( Vec_PtrEntry(vPartSuppsBit, iPart), vOne, Aig_ManPiNum(p) ); + } + } + + // stop char-based support representation + Vec_PtrForEachEntry( vPartSuppsBit, vTemp, i ) + free( vTemp ); + Vec_PtrFree( vPartSuppsBit ); + +//printf( "\n" ); +if ( fVerbose ) +{ +PRT( "Parts", clock() - clk ); +} + +clk = clock(); + // reorder partitions in the decreasing order of support sizes + // remember partition number in each partition support + Vec_PtrForEachEntry( vPartSuppsAll, vOne, i ) + Vec_IntPush( vOne, i ); + // sort the supports in the decreasing order + Vec_VecSort( (Vec_Vec_t *)vPartSuppsAll, 1 ); + // reproduce partitions + vPartsAll2 = Vec_PtrAlloc( 256 ); + Vec_PtrForEachEntry( vPartSuppsAll, vOne, i ) + Vec_PtrPush( vPartsAll2, Vec_PtrEntry(vPartsAll, Vec_IntPop(vOne)) ); + Vec_PtrFree( vPartsAll ); + vPartsAll = vPartsAll2; + + // compact small partitions +// Aig_ManPartitionPrint( p, vPartsAll, vPartSuppsAll ); + Aig_ManPartitionCompact( vPartsAll, vPartSuppsAll, nSuppSizeLimit ); + if ( fVerbose ) +// Aig_ManPartitionPrint( p, vPartsAll, vPartSuppsAll ); + printf( "Created %d partitions.\n", Vec_PtrSize(vPartsAll) ); + +if ( fVerbose ) +{ +//PRT( "Comps", clock() - clk ); +} + + // cleanup + Vec_VecFree( (Vec_Vec_t *)vSupports ); + if ( pvPartSupps == NULL ) + Vec_VecFree( (Vec_Vec_t *)vPartSuppsAll ); + else + *pvPartSupps = vPartSuppsAll; +/* + // converts from intergers to nodes + Vec_PtrForEachEntry( vPartsAll, vPart, iPart ) + { + vPartPtr = Vec_PtrAlloc( Vec_IntSize(vPart) ); + Vec_IntForEachEntry( vPart, iOut, i ) + Vec_PtrPush( vPartPtr, Aig_ManPo(p, iOut) ); + Vec_IntFree( vPart ); + Vec_PtrWriteEntry( vPartsAll, iPart, vPartPtr ); + } +*/ + return vPartsAll; +} + +/**Function************************************************************* + + Synopsis [Perform the naive partitioning.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManPartitionNaive( Aig_Man_t * p, int nPartSize ) +{ + Vec_Ptr_t * vParts; + Aig_Obj_t * pObj; + int nParts, i; + nParts = (Aig_ManPoNum(p) / nPartSize) + ((Aig_ManPoNum(p) % nPartSize) > 0); + vParts = (Vec_Ptr_t *)Vec_VecStart( nParts ); + Aig_ManForEachPo( p, pObj, i ) + Vec_IntPush( Vec_PtrEntry(vParts, i / nPartSize), i ); + return vParts; +} + + + +/**Function************************************************************* + + Synopsis [Adds internal nodes in the topological order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ManDupPart_rec( Aig_Man_t * pNew, Aig_Man_t * pOld, Aig_Obj_t * pObj, Vec_Int_t * vSuppMap ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsTravIdCurrent(pOld, pObj) ) + return pObj->pData; + Aig_ObjSetTravIdCurrent(pOld, pObj); + if ( Aig_ObjIsPi(pObj) ) + { + assert( Vec_IntSize(vSuppMap) == Aig_ManPiNum(pNew) ); + Vec_IntPush( vSuppMap, (int)(long)pObj->pNext ); + return pObj->pData = Aig_ObjCreatePi(pNew); + } + assert( Aig_ObjIsNode(pObj) ); + Aig_ManDupPart_rec( pNew, pOld, Aig_ObjFanin0(pObj), vSuppMap ); + Aig_ManDupPart_rec( pNew, pOld, Aig_ObjFanin1(pObj), vSuppMap ); + return pObj->pData = Aig_And( pNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Adds internal nodes in the topological order.] + + Description [Returns the array of new outputs.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDupPart( Aig_Man_t * pNew, Aig_Man_t * pOld, Vec_Int_t * vPart, Vec_Int_t * vSuppMap, int fInverse ) +{ + Vec_Ptr_t * vOutsTotal; + Aig_Obj_t * pObj; + int Entry, i; + // create the PIs + Aig_ManIncrementTravId( pOld ); + Aig_ManConst1(pOld)->pData = Aig_ManConst1(pNew); + Aig_ObjSetTravIdCurrent( pOld, Aig_ManConst1(pOld) ); + if ( !fInverse ) + { + Vec_IntForEachEntry( vSuppMap, Entry, i ) + { + pObj = Aig_ManPi( pOld, Entry ); + pObj->pData = Aig_ManPi( pNew, i ); + Aig_ObjSetTravIdCurrent( pOld, pObj ); + } + } + else + { + Vec_IntForEachEntry( vSuppMap, Entry, i ) + { + pObj = Aig_ManPi( pOld, i ); + pObj->pData = Aig_ManPi( pNew, Entry ); + Aig_ObjSetTravIdCurrent( pOld, pObj ); + } + vSuppMap = NULL; // should not be useful + } + // create the internal nodes + vOutsTotal = Vec_PtrAlloc( Vec_IntSize(vPart) ); + if ( !fInverse ) + { + Vec_IntForEachEntry( vPart, Entry, i ) + { + pObj = Aig_ManPo( pOld, Entry ); + Aig_ManDupPart_rec( pNew, pOld, Aig_ObjFanin0(pObj), vSuppMap ); + Vec_PtrPush( vOutsTotal, Aig_ObjChild0Copy(pObj) ); + } + } + else + { + Aig_ManForEachObj( pOld, pObj, i ) + { + if ( Aig_ObjIsPo(pObj) ) + { + Aig_ManDupPart_rec( pNew, pOld, Aig_ObjFanin0(pObj), vSuppMap ); + Vec_PtrPush( vOutsTotal, Aig_ObjChild0Copy(pObj) ); + } + else if ( Aig_ObjIsNode(pObj) && pObj->nRefs == 0 ) + Aig_ManDupPart_rec( pNew, pOld, pObj, vSuppMap ); + + } + } + return vOutsTotal; +} + +/**Function************************************************************* + + Synopsis [Create partitioned miter of the two AIGs.] + + Description [Assumes that each output in the second AIG cannot have + more supp vars than the same output in the first AIG.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManMiterPartitioned( Aig_Man_t * p1, Aig_Man_t * p2, int nPartSize ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pMiter; + Vec_Ptr_t * vMiters, * vNodes1, * vNodes2; + Vec_Ptr_t * vParts, * vPartSupps; + Vec_Int_t * vPart, * vPartSupp; + int i, k; + // partition the first manager + vParts = Aig_ManPartitionSmart( p1, nPartSize, 0, &vPartSupps ); + // derive miters + vMiters = Vec_PtrAlloc( Vec_PtrSize(vParts) ); + for ( i = 0; i < Vec_PtrSize(vParts); i++ ) + { + // get partition and its support + vPart = Vec_PtrEntry( vParts, i ); + vPartSupp = Vec_PtrEntry( vPartSupps, i ); + // create the new miter + pNew = Aig_ManStart( 1000 ); +// pNew->pName = Extra_UtilStrsav( p1->pName ); + // create the PIs + for ( k = 0; k < Vec_IntSize(vPartSupp); k++ ) + Aig_ObjCreatePi( pNew ); + // copy the components + vNodes1 = Aig_ManDupPart( pNew, p1, vPart, vPartSupp, 0 ); + vNodes2 = Aig_ManDupPart( pNew, p2, vPart, vPartSupp, 0 ); + // create the miter + pMiter = Aig_MiterTwo( pNew, vNodes1, vNodes2 ); + Vec_PtrFree( vNodes1 ); + Vec_PtrFree( vNodes2 ); + // create the output + Aig_ObjCreatePo( pNew, pMiter ); + // clean up + Aig_ManCleanup( pNew ); + Vec_PtrPush( vMiters, pNew ); + } + Vec_VecFree( (Vec_Vec_t *)vParts ); + Vec_VecFree( (Vec_Vec_t *)vPartSupps ); + return vMiters; +} + +/**Function************************************************************* + + Synopsis [Performs partitioned choice computation.] + + Description [Assumes that each output in the second AIG cannot have + more supp vars than the same output in the first AIG.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManChoicePartitioned( Vec_Ptr_t * vAigs, int nPartSize, int fVerbose ) +{ +// extern int Cmd_CommandExecute( void * pAbc, char * sCommand ); +// extern void * Abc_FrameGetGlobalFrame(); + extern Aig_Man_t * Fra_FraigChoice( Aig_Man_t * pManAig, int nConfMax ); + + Vec_Ptr_t * vOutsTotal, * vOuts; + Aig_Man_t * pAigTotal, * pAigPart, * pAig; + Vec_Int_t * vPart, * vPartSupp; + Vec_Ptr_t * vParts; + Aig_Obj_t * pObj; + void ** ppData; + int i, k, m; + + // partition the first AIG in the array + assert( Vec_PtrSize(vAigs) > 1 ); + pAig = Vec_PtrEntry( vAigs, 0 ); + vParts = Aig_ManPartitionSmart( pAig, nPartSize, 0, NULL ); + + // start the total fraiged AIG + pAigTotal = Aig_ManStartFrom( pAig ); + Aig_ManReprStart( pAigTotal, Vec_PtrSize(vAigs) * Aig_ManObjNumMax(pAig) + 10000 ); + vOutsTotal = Vec_PtrStart( Aig_ManPoNum(pAig) ); + + // set the PI numbers + Vec_PtrForEachEntry( vAigs, pAig, i ) + Aig_ManForEachPi( pAig, pObj, k ) + pObj->pNext = (Aig_Obj_t *)(long)k; + +// Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "unset progressbar" ); + + // create the total fraiged AIG + vPartSupp = Vec_IntAlloc( 100 ); // maps part PI num into total PI num + Vec_PtrForEachEntry( vParts, vPart, i ) + { + // derive the partition AIG + pAigPart = Aig_ManStart( 5000 ); +// pAigPart->pName = Extra_UtilStrsav( pAigPart->pName ); + Vec_IntClear( vPartSupp ); + Vec_PtrForEachEntry( vAigs, pAig, k ) + { + vOuts = Aig_ManDupPart( pAigPart, pAig, vPart, vPartSupp, 0 ); + if ( k == 0 ) + { + Vec_PtrForEachEntry( vOuts, pObj, m ) + Aig_ObjCreatePo( pAigPart, pObj ); + } + Vec_PtrFree( vOuts ); + } + // derive the total AIG from the partitioned AIG + vOuts = Aig_ManDupPart( pAigTotal, pAigPart, vPart, vPartSupp, 1 ); + // add to the outputs + Vec_PtrForEachEntry( vOuts, pObj, k ) + { + assert( Vec_PtrEntry( vOutsTotal, Vec_IntEntry(vPart,k) ) == NULL ); + Vec_PtrWriteEntry( vOutsTotal, Vec_IntEntry(vPart,k), pObj ); + } + Vec_PtrFree( vOuts ); + // store contents of pData pointers + ppData = ALLOC( void *, Aig_ManObjNumMax(pAigPart) ); + Aig_ManForEachObj( pAigPart, pObj, k ) + ppData[k] = pObj->pData; + // report the process + if ( fVerbose ) + printf( "Part %4d (out of %4d) PI = %5d. PO = %5d. And = %6d. Lev = %4d.\r", + i+1, Vec_PtrSize(vParts), Aig_ManPiNum(pAigPart), Aig_ManPoNum(pAigPart), + Aig_ManNodeNum(pAigPart), Aig_ManLevelNum(pAigPart) ); + // compute equivalence classes (to be stored in pNew->pReprs) + pAig = Fra_FraigChoice( pAigPart, 1000 ); + Aig_ManStop( pAig ); + // reset the pData pointers + Aig_ManForEachObj( pAigPart, pObj, k ) + pObj->pData = ppData[k]; + free( ppData ); + // transfer representatives to the total AIG + if ( pAigPart->pReprs ) + Aig_ManTransferRepr( pAigTotal, pAigPart ); + Aig_ManStop( pAigPart ); + } + if ( fVerbose ) + printf( " \r" ); + Vec_VecFree( (Vec_Vec_t *)vParts ); + Vec_IntFree( vPartSupp ); + +// Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "set progressbar" ); + + // clear the PI numbers + Vec_PtrForEachEntry( vAigs, pAig, i ) + Aig_ManForEachPi( pAig, pObj, k ) + pObj->pNext = NULL; +/* + // collect the missing outputs (outputs whose driver is not a node) + pAig = Vec_PtrEntry( vAigs, 0 ); + Aig_ManConst1(pAig)->pData = Aig_ManConst1(pAigTotal); + Aig_ManForEachPi( pAig, pObj, i ) + pAig->pData = Aig_ManPi( pAigTotal, i ); + Aig_ManForEachPo( pAig, pObj, i ) + if ( !Aig_ObjIsNode(Aig_ObjFanin0(pObj)) ) + { + assert( Vec_PtrEntry( vOutsTotal, i ) == NULL ); + Vec_PtrWriteEntry( vOutsTotal, i, Aig_ObjChild0Copy(pObj) ); + } +*/ + // add the outputs in the same order + Vec_PtrForEachEntry( vOutsTotal, pObj, i ) + Aig_ObjCreatePo( pAigTotal, pObj ); + Vec_PtrFree( vOutsTotal ); + + // derive the result of choicing + pAig = Aig_ManRehash( pAigTotal ); + // create the equivalent nodes lists + Aig_ManMarkValidChoices( pAig ); + return pAig; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigRepr.c b/src/aig/aig/aigRepr.c new file mode 100644 index 00000000..5ee6c9af --- /dev/null +++ b/src/aig/aig/aigRepr.c @@ -0,0 +1,457 @@ +/**CFile**************************************************************** + + FileName [aigRepr.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Handing node representatives.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigRepr.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the array of representatives.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManReprStart( Aig_Man_t * p, int nIdMax ) +{ + assert( Aig_ManBufNum(p) == 0 ); + assert( p->pReprs == NULL ); + p->nReprsAlloc = nIdMax; + p->pReprs = ALLOC( Aig_Obj_t *, p->nReprsAlloc ); + memset( p->pReprs, 0, sizeof(Aig_Obj_t *) * p->nReprsAlloc ); +} + +/**Function************************************************************* + + Synopsis [Stop the array of representatives.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManReprStop( Aig_Man_t * p ) +{ + assert( p->pReprs != NULL ); + FREE( p->pReprs ); + p->nReprsAlloc = 0; +} + +/**Function************************************************************* + + Synopsis [Set the representative.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjCreateRepr( Aig_Man_t * p, Aig_Obj_t * pNode1, Aig_Obj_t * pNode2 ) +{ + assert( p->pReprs != NULL ); + assert( !Aig_IsComplement(pNode1) ); + assert( !Aig_IsComplement(pNode2) ); + assert( pNode1->Id < p->nReprsAlloc ); + assert( pNode2->Id < p->nReprsAlloc ); + assert( pNode1->Id < pNode2->Id ); + p->pReprs[pNode2->Id] = pNode1; +} + +/**Function************************************************************* + + Synopsis [Set the representative.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Aig_ObjSetRepr( Aig_Man_t * p, Aig_Obj_t * pNode1, Aig_Obj_t * pNode2 ) +{ + assert( p->pReprs != NULL ); + assert( !Aig_IsComplement(pNode1) ); + assert( !Aig_IsComplement(pNode2) ); + assert( pNode1->Id < p->nReprsAlloc ); + assert( pNode2->Id < p->nReprsAlloc ); + if ( pNode1 == pNode2 ) + return; + if ( pNode1->Id < pNode2->Id ) + p->pReprs[pNode2->Id] = pNode1; + else + p->pReprs[pNode1->Id] = pNode2; +} + +/**Function************************************************************* + + Synopsis [Find representative.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Aig_Obj_t * Aig_ObjFindRepr( Aig_Man_t * p, Aig_Obj_t * pNode ) +{ + assert( p->pReprs != NULL ); + assert( !Aig_IsComplement(pNode) ); + assert( pNode->Id < p->nReprsAlloc ); +// assert( !p->pReprs[pNode->Id] || p->pReprs[pNode->Id]->Id < pNode->Id ); + return p->pReprs[pNode->Id]; +} + +/**Function************************************************************* + + Synopsis [Clears the representative.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Aig_ObjClearRepr( Aig_Man_t * p, Aig_Obj_t * pNode ) +{ + assert( p->pReprs != NULL ); + assert( !Aig_IsComplement(pNode) ); + assert( pNode->Id < p->nReprsAlloc ); + p->pReprs[pNode->Id] = NULL; +} + +/**Function************************************************************* + + Synopsis [Find representative transitively.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Aig_Obj_t * Aig_ObjFindReprTransitive( Aig_Man_t * p, Aig_Obj_t * pNode ) +{ + Aig_Obj_t * pNext, * pRepr; + if ( (pRepr = Aig_ObjFindRepr(p, pNode)) ) + while ( (pNext = Aig_ObjFindRepr(p, pRepr)) ) + pRepr = pNext; + return pRepr; +} + +/**Function************************************************************* + + Synopsis [Returns representatives of fanin in approapriate polarity.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Aig_Obj_t * Aig_ObjRepr( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pRepr; + if ( (pRepr = Aig_ObjFindRepr(p, pObj)) ) + return Aig_NotCond( pRepr->pData, pObj->fPhase ^ pRepr->fPhase ); + return pObj->pData; +} +static inline Aig_Obj_t * Aig_ObjChild0Repr( Aig_Man_t * p, Aig_Obj_t * pObj ) { return Aig_NotCond( Aig_ObjRepr(p, Aig_ObjFanin0(pObj)), Aig_ObjFaninC0(pObj) ); } +static inline Aig_Obj_t * Aig_ObjChild1Repr( Aig_Man_t * p, Aig_Obj_t * pObj ) { return Aig_NotCond( Aig_ObjRepr(p, Aig_ObjFanin1(pObj)), Aig_ObjFaninC1(pObj) ); } + +/**Function************************************************************* + + Synopsis [Duplicates AIG while substituting representatives.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManTransferRepr( Aig_Man_t * pNew, Aig_Man_t * pOld ) +{ + Aig_Obj_t * pObj, * pRepr; + int k; + assert( pNew->pReprs != NULL ); + // extend storage to fix pNew + if ( pNew->nReprsAlloc < Aig_ManObjNumMax(pNew) ) + { + int nReprsAllocNew = 2 * Aig_ManObjNumMax(pNew); + pNew->pReprs = REALLOC( Aig_Obj_t *, pNew->pReprs, nReprsAllocNew ); + memset( pNew->pReprs + pNew->nReprsAlloc, 0, sizeof(Aig_Obj_t *) * (nReprsAllocNew-pNew->nReprsAlloc) ); + pNew->nReprsAlloc = nReprsAllocNew; + } + // go through the nodes which have representatives + Aig_ManForEachObj( pOld, pObj, k ) + if ( (pRepr = Aig_ObjFindRepr(pOld, pObj)) ) + Aig_ObjSetRepr( pNew, Aig_Regular(pRepr->pData), Aig_Regular(pObj->pData) ); +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager recursively.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ManDupRepr_rec( Aig_Man_t * pNew, Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pRepr; + if ( pObj->pData ) + return pObj->pData; + if ( (pRepr = Aig_ObjFindRepr(p, pObj)) ) + { + Aig_ManDupRepr_rec( pNew, p, pRepr ); + return pObj->pData = Aig_NotCond( pRepr->pData, pRepr->fPhase ^ pObj->fPhase ); + } + Aig_ManDupRepr_rec( pNew, p, Aig_ObjFanin0(pObj) ); + Aig_ManDupRepr_rec( pNew, p, Aig_ObjFanin1(pObj) ); + return pObj->pData = Aig_And( pNew, Aig_ObjChild0Repr(p, pObj), Aig_ObjChild1Repr(p, pObj) ); +} + +/**Function************************************************************* + + Synopsis [Duplicates AIG while substituting representatives.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManDupRepr( Aig_Man_t * p, int fOrdered ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj; + int i; + // start the HOP package + pNew = Aig_ManStart( Aig_ManObjNumMax(p) ); + pNew->pName = Aig_UtilStrsav( p->pName ); + pNew->nRegs = p->nRegs; + if ( p->vFlopNums ) + pNew->vFlopNums = Vec_IntDup( p->vFlopNums ); + // map the const and primary inputs + Aig_ManCleanData( p ); + Aig_ManConst1(p)->pData = Aig_ManConst1(pNew); + Aig_ManForEachPi( p, pObj, i ) + pObj->pData = Aig_ObjCreatePi(pNew); + // map the internal nodes + if ( fOrdered ) + { + Aig_ManForEachNode( p, pObj, i ) + pObj->pData = Aig_And( pNew, Aig_ObjChild0Repr(p, pObj), Aig_ObjChild1Repr(p, pObj) ); + } + else + { + Aig_ManForEachPo( p, pObj, i ) + Aig_ManDupRepr_rec( pNew, p, Aig_ObjFanin0(pObj) ); + } + // transfer the POs + Aig_ManForEachPo( p, pObj, i ) + Aig_ObjCreatePo( pNew, Aig_ObjChild0Repr(p, pObj) ); + // check the new manager + if ( !Aig_ManCheck(pNew) ) + printf( "Aig_ManDupRepr: Check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Transfer representatives and return the number of critical fanouts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManRemapRepr( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pRepr; + int i, nFanouts = 0; + Aig_ManForEachNode( p, pObj, i ) + { + pRepr = Aig_ObjFindReprTransitive( p, pObj ); + if ( pRepr == NULL ) + continue; + assert( pRepr->Id < pObj->Id ); + Aig_ObjSetRepr( p, pObj, pRepr ); + nFanouts += (pObj->nRefs > 0); + } + return nFanouts; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pOld is in the TFI of pNew.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjCheckTfi_rec( Aig_Man_t * p, Aig_Obj_t * pNode, Aig_Obj_t * pOld ) +{ + // check the trivial cases + if ( pNode == NULL ) + return 0; +// if ( pNode->Id < pOld->Id ) // cannot use because of choices of pNode +// return 0; + if ( pNode == pOld ) + return 1; + // skip the visited node + if ( Aig_ObjIsTravIdCurrent( p, pNode ) ) + return 0; + Aig_ObjSetTravIdCurrent( p, pNode ); + // check the children + if ( Aig_ObjCheckTfi_rec( p, Aig_ObjFanin0(pNode), pOld ) ) + return 1; + if ( Aig_ObjCheckTfi_rec( p, Aig_ObjFanin1(pNode), pOld ) ) + return 1; + // check equivalent nodes + return Aig_ObjCheckTfi_rec( p, p->pEquivs[pNode->Id], pOld ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pOld is in the TFI of pNew.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjCheckTfi( Aig_Man_t * p, Aig_Obj_t * pNew, Aig_Obj_t * pOld ) +{ + assert( !Aig_IsComplement(pNew) ); + assert( !Aig_IsComplement(pOld) ); + Aig_ManIncrementTravId( p ); + return Aig_ObjCheckTfi_rec( p, pNew, pOld ); +} + +/**Function************************************************************* + + Synopsis [Iteratively rehashes the AIG.] + + Description [The input AIG is assumed to have representatives assigned.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManRehash( Aig_Man_t * p ) +{ + Aig_Man_t * pTemp; + int i, nFanouts; + assert( p->pReprs != NULL ); + for ( i = 0; (nFanouts = Aig_ManRemapRepr( p )); i++ ) + { +// printf( "Iter = %3d. Fanouts = %6d. Nodes = %7d.\n", i+1, nFanouts, Aig_ManNodeNum(p) ); + p = Aig_ManDupRepr( pTemp = p, 1 ); + Aig_ManReprStart( p, Aig_ManObjNumMax(p) ); + Aig_ManTransferRepr( p, pTemp ); + Aig_ManStop( pTemp ); + } + return p; +} + +/**Function************************************************************* + + Synopsis [Marks the nodes that are Creates choices.] + + Description [The input AIG is assumed to have representatives assigned.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManMarkValidChoices( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pRepr; + int i; + assert( p->pReprs != NULL ); + // create equivalent nodes in the manager + assert( p->pEquivs == NULL ); + p->pEquivs = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(p) ); + memset( p->pEquivs, 0, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(p) ); + // make the choice nodes + Aig_ManForEachNode( p, pObj, i ) + { + pRepr = Aig_ObjFindRepr( p, pObj ); + if ( pRepr == NULL ) + continue; + assert( pObj->nRefs == 0 ); + // skip constant and PI classes + if ( !Aig_ObjIsNode(pRepr) ) + { + Aig_ObjClearRepr( p, pObj ); + continue; + } + // skip choices with combinatinal loops + if ( Aig_ObjCheckTfi( p, pObj, pRepr ) ) + { + Aig_ObjClearRepr( p, pObj ); + continue; + } +//printf( "Node %d is represented by node %d.\n", pObj->Id, pRepr->Id ); + // add choice to the choice node + p->pEquivs[pObj->Id] = p->pEquivs[pRepr->Id]; + p->pEquivs[pRepr->Id] = pObj; + } +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigRet.c b/src/aig/aig/aigRet.c new file mode 100644 index 00000000..d1784b1b --- /dev/null +++ b/src/aig/aig/aigRet.c @@ -0,0 +1,969 @@ +/**CFile**************************************************************** + + FileName [aigRet.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Retiming of AIGs.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigRet.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// init values +typedef enum { + RTM_VAL_NONE, // 0: non-existent value + RTM_VAL_ZERO, // 1: initial value 0 + RTM_VAL_ONE, // 2: initial value 1 + RTM_VAL_VOID // 3: unused value +} Rtm_Init_t; + +typedef struct Rtm_Man_t_ Rtm_Man_t; +struct Rtm_Man_t_ +{ + // network representation + Vec_Ptr_t * vObjs; // retiming objects + Vec_Ptr_t * vPis; // PIs only + Vec_Ptr_t * vPos; // POs only + Aig_MmFlex_t * pMem; // the memory manager + // autonomous components after cutting off + // storage for overflow latches + unsigned * pExtra; + int nExtraCur; + int nExtraAlloc; +}; + +typedef struct Rtm_Edg_t_ Rtm_Edg_t; +struct Rtm_Edg_t_ +{ + unsigned long nLats : 12; // the number of latches + unsigned long LData : 20; // the latches themselves +}; + +typedef struct Rtm_Obj_t_ Rtm_Obj_t; +struct Rtm_Obj_t_ +{ + void * pCopy; // the copy of this object + unsigned long Type : 3; // object type + unsigned long fMark : 1; // multipurpose mark + unsigned long fAuto : 1; // this object belongs to an autonomous component + unsigned long fCompl0 : 1; // complemented attribute of the first edge + unsigned long fCompl1 : 1; // complemented attribute of the second edge + unsigned long nFanins : 8; // the number of fanins + unsigned Num : 17; // the retiming number of this node + int Id; // ID of this object + int Temp; // temporary usage + int nFanouts; // the number of fanouts + void * pFanio[0]; // fanins and their edges (followed by fanouts and pointers to their edges) +}; + +static inline Rtm_Obj_t * Rtm_ObjFanin( Rtm_Obj_t * pObj, int i ) { return (Rtm_Obj_t *)pObj->pFanio[2*i]; } +static inline Rtm_Obj_t * Rtm_ObjFanout( Rtm_Obj_t * pObj, int i ) { return (Rtm_Obj_t *)pObj->pFanio[2*(pObj->nFanins+i)]; } +static inline Rtm_Edg_t * Rtm_ObjEdge( Rtm_Obj_t * pObj, int i ) { return (Rtm_Edg_t *)(pObj->pFanio + 2*i + 1); } +static inline Rtm_Edg_t * Rtm_ObjFanoutEdge( Rtm_Obj_t * pObj, int i ) { return (Rtm_Edg_t *)pObj->pFanio[2*(pObj->nFanins+i) + 1]; } + +static inline Rtm_Init_t Rtm_InitNot( Rtm_Init_t Val ) { if ( Val == RTM_VAL_ZERO ) return RTM_VAL_ONE; if ( Val == RTM_VAL_ONE ) return RTM_VAL_ZERO; assert( 0 ); return -1; } +static inline Rtm_Init_t Rtm_InitNotCond( Rtm_Init_t Val, int c ) { return c ? Rtm_InitNot(Val) : Val; } +static inline Rtm_Init_t Rtm_InitAnd(Rtm_Init_t ValA, Rtm_Init_t ValB ) { if ( ValA == RTM_VAL_ONE && ValB == RTM_VAL_ONE ) return RTM_VAL_ONE; if ( ValA == RTM_VAL_ZERO || ValB == RTM_VAL_ZERO ) return RTM_VAL_ZERO; assert( 0 ); return -1; } + +static inline int Rtm_InitWordsNum( int nLats ) { return (nLats >> 4) + ((nLats & 15) > 0); } +static inline int Rtm_InitGetTwo( unsigned * p, int i ) { return (p[i>>4] >> ((i & 15)<<1)) & 3; } +static inline void Rtm_InitSetTwo( unsigned * p, int i, int val ) { p[i>>4] |= (val << ((i & 15)<<1)); } +static inline void Rtm_InitXorTwo( unsigned * p, int i, int val ) { p[i>>4] ^= (val << ((i & 15)<<1)); } + +static inline Rtm_Init_t Rtm_ObjGetFirst1( Rtm_Edg_t * pEdge ) { return pEdge->LData & 3; } +static inline Rtm_Init_t Rtm_ObjGetLast1( Rtm_Edg_t * pEdge ) { return (pEdge->LData >> ((pEdge->nLats-1)<<1)) & 3; } +static inline Rtm_Init_t Rtm_ObjGetOne1( Rtm_Edg_t * pEdge, int i ) { assert( i < (int)pEdge->nLats ); return (pEdge->LData >> (i << 1)) & 3; } +static inline Rtm_Init_t Rtm_ObjRemFirst1( Rtm_Edg_t * pEdge ) { int Val = pEdge->LData & 3; pEdge->LData >>= 2; assert(pEdge->nLats > 0); pEdge->nLats--; return Val; } +static inline Rtm_Init_t Rtm_ObjRemLast1( Rtm_Edg_t * pEdge ) { int Val = (pEdge->LData >> ((pEdge->nLats-1)<<1)) & 3; pEdge->LData ^= Val << ((pEdge->nLats-1)<<1); assert(pEdge->nLats > 0); pEdge->nLats--; return Val; } +static inline void Rtm_ObjAddFirst1( Rtm_Edg_t * pEdge, Rtm_Init_t Val ) { assert( Val > 0 && Val < 4 ); pEdge->LData = (pEdge->LData << 2) | Val; pEdge->nLats++; } +static inline void Rtm_ObjAddLast1( Rtm_Edg_t * pEdge, Rtm_Init_t Val ) { assert( Val > 0 && Val < 4 ); pEdge->LData |= Val << (pEdge->nLats<<1); pEdge->nLats++; } + +static inline Rtm_Init_t Rtm_ObjGetFirst2( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { return Rtm_InitGetTwo( p->pExtra + pEdge->LData, 0 ); } +static inline Rtm_Init_t Rtm_ObjGetLast2( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { return Rtm_InitGetTwo( p->pExtra + pEdge->LData, pEdge->nLats - 1 ); } +static inline Rtm_Init_t Rtm_ObjGetOne2( Rtm_Man_t * p, Rtm_Edg_t * pEdge, int i ) { return Rtm_InitGetTwo( p->pExtra + pEdge->LData, i ); } +static Rtm_Init_t Rtm_ObjRemFirst2( Rtm_Man_t * p, Rtm_Edg_t * pEdge ); +static inline Rtm_Init_t Rtm_ObjRemLast2( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { Rtm_Init_t Val = Rtm_ObjGetLast2( p, pEdge ); Rtm_InitXorTwo( p->pExtra + pEdge->LData, pEdge->nLats - 1, Val ); pEdge->nLats--; return Val; } +static void Rtm_ObjAddFirst2( Rtm_Man_t * p, Rtm_Edg_t * pEdge, Rtm_Init_t Val ); +static inline void Rtm_ObjAddLast2( Rtm_Man_t * p, Rtm_Edg_t * pEdge, Rtm_Init_t Val ) { Rtm_InitSetTwo( p->pExtra + pEdge->LData, pEdge->nLats, Val ); pEdge->nLats++; } + +static void Rtm_ObjTransferToSmall( Rtm_Man_t * p, Rtm_Edg_t * pEdge ); +static void Rtm_ObjTransferToBig( Rtm_Man_t * p, Rtm_Edg_t * pEdge ); +static void Rtm_ObjTransferToBigger( Rtm_Man_t * p, Rtm_Edg_t * pEdge ); + +static inline Rtm_Init_t Rtm_ObjGetFirst( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { return pEdge->nLats > 10? Rtm_ObjGetFirst2(p, pEdge) : Rtm_ObjGetFirst1(pEdge); } +static inline Rtm_Init_t Rtm_ObjGetLast( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { return pEdge->nLats > 10? Rtm_ObjGetLast2(p, pEdge) : Rtm_ObjGetLast1(pEdge); } +static inline Rtm_Init_t Rtm_ObjGetOne( Rtm_Man_t * p, Rtm_Edg_t * pEdge, int i ) { return pEdge->nLats > 10? Rtm_ObjGetOne2(p, pEdge, i) : Rtm_ObjGetOne1(pEdge, i); } +static Rtm_Init_t Rtm_ObjRemFirst( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { Rtm_Init_t Res = pEdge->nLats > 10 ? Rtm_ObjRemFirst2(p, pEdge) : Rtm_ObjRemFirst1(pEdge); if ( pEdge->nLats == 10 ) Rtm_ObjTransferToSmall(p, pEdge); return Res; } +static Rtm_Init_t Rtm_ObjRemLast( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) { Rtm_Init_t Res = pEdge->nLats > 10 ? Rtm_ObjRemLast2(p, pEdge) : Rtm_ObjRemLast1(pEdge); if ( pEdge->nLats == 10 ) Rtm_ObjTransferToSmall(p, pEdge); return Res; } +static void Rtm_ObjAddFirst( Rtm_Man_t * p, Rtm_Edg_t * pEdge, Rtm_Init_t Val ) { if ( pEdge->nLats == 10 ) Rtm_ObjTransferToBig(p, pEdge); else if ( (pEdge->nLats & 15) == 15 ) Rtm_ObjTransferToBigger(p, pEdge); if ( pEdge->nLats >= 10 ) Rtm_ObjAddFirst2(p, pEdge, Val); else Rtm_ObjAddFirst1(pEdge, Val); } +static void Rtm_ObjAddLast( Rtm_Man_t * p, Rtm_Edg_t * pEdge, Rtm_Init_t Val ) { if ( pEdge->nLats == 10 ) Rtm_ObjTransferToBig(p, pEdge); else if ( (pEdge->nLats & 15) == 15 ) Rtm_ObjTransferToBigger(p, pEdge); if ( pEdge->nLats >= 10 ) Rtm_ObjAddLast2(p, pEdge, Val); else Rtm_ObjAddLast1(pEdge, Val); } + + +// iterator over the primary inputs +#define Rtm_ManForEachPi( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPis, pObj, i ) +// iterator over the primary outputs +#define Rtm_ManForEachPo( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPos, pObj, i ) +// iterator over all objects, including those currently not used +#define Rtm_ManForEachObj( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vObjs, pObj, i ) +// iterate through the fanins +#define Rtm_ObjForEachFanin( pObj, pFanin, i ) \ + for ( i = 0; i < (int)(pObj)->nFanins && ((pFanin = Rtm_ObjFanin(pObj, i)), 1); i++ ) +// iterate through the fanouts +#define Rtm_ObjForEachFanout( pObj, pFanout, i ) \ + for ( i = 0; i < (int)(pObj)->nFanouts && ((pFanout = Rtm_ObjFanout(pObj, i)), 1); i++ ) +// iterate through the fanin edges +#define Rtm_ObjForEachFaninEdge( pObj, pEdge, i ) \ + for ( i = 0; i < (int)(pObj)->nFanins && ((pEdge = Rtm_ObjEdge(pObj, i)), 1); i++ ) +// iterate through the fanout edges +#define Rtm_ObjForEachFanoutEdge( pObj, pEdge, i ) \ + for ( i = 0; i < (int)(pObj)->nFanouts && ((pEdge = Rtm_ObjFanoutEdge(pObj, i)), 1); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Transfers from big to small storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjTransferToSmall( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) +{ + assert( pEdge->nLats == 10 ); + pEdge->LData = p->pExtra[pEdge->LData]; +} + +/**Function************************************************************* + + Synopsis [Transfers from small to big storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjTransferToBig( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) +{ + assert( pEdge->nLats == 10 ); + if ( p->nExtraCur + 1 > p->nExtraAlloc ) + { + int nExtraAllocNew = AIG_MAX( 2 * p->nExtraAlloc, 1024 ); + p->pExtra = REALLOC( unsigned, p->pExtra, nExtraAllocNew ); + p->nExtraAlloc = nExtraAllocNew; + } + p->pExtra[p->nExtraCur] = pEdge->LData; + pEdge->LData = p->nExtraCur++; +} + +/**Function************************************************************* + + Synopsis [Transfers to bigger storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjTransferToBigger( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) +{ + int nWords; + assert( (pEdge->nLats & 15) == 15 ); + nWords = (pEdge->nLats + 1) >> 4; + if ( p->nExtraCur + nWords + 1 > p->nExtraAlloc ) + { + int nExtraAllocNew = AIG_MAX( 2 * p->nExtraAlloc, 1024 ); + p->pExtra = REALLOC( unsigned, p->pExtra, nExtraAllocNew ); + p->nExtraAlloc = nExtraAllocNew; + } + memcpy( p->pExtra + p->nExtraCur, p->pExtra + pEdge->LData, sizeof(unsigned) * nWords ); + p->pExtra[p->nExtraCur + nWords] = 0; + pEdge->LData = p->nExtraCur; + p->nExtraCur += nWords + 1; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rtm_Init_t Rtm_ObjRemFirst2( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) +{ + Rtm_Init_t Val = 0, Temp; + unsigned * pB = p->pExtra + pEdge->LData, * pE = pB + Rtm_InitWordsNum( pEdge->nLats-- ) - 1; + while ( pE >= pB ) + { + Temp = *pE & 3; + *pE = (*pE >> 2) | (Val << 30); + Val = Temp; + pE--; + } + assert( Val != 0 ); + return Val; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjAddFirst2( Rtm_Man_t * p, Rtm_Edg_t * pEdge, Rtm_Init_t Val ) +{ + unsigned * pB = p->pExtra + pEdge->LData, * pE = pB + Rtm_InitWordsNum( ++pEdge->nLats ); + Rtm_Init_t Temp; + assert( Val != 0 ); + while ( pB < pE ) + { + Temp = *pB >> 30; + *pB = (*pB << 2) | Val; + Val = Temp; + pB++; + } +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_PrintEdge( Rtm_Man_t * p, Rtm_Edg_t * pEdge ) +{ +// unsigned LData = pEdge->LData; + printf( "%d : ", pEdge->nLats ); +/* + if ( pEdge->nLats > 10 ) + Extra_PrintBinary( stdout, p->pExtra + pEdge->LData, 2*(pEdge->nLats+1) ); + else + Extra_PrintBinary( stdout, &LData, 2*(pEdge->nLats+1) ); +*/ + printf( "\n" ); +} + + +/**Function************************************************************* + + Synopsis [Allocates the retiming manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rtm_Man_t * Rtm_ManAlloc( Aig_Man_t * p ) +{ + Rtm_Man_t * pRtm; + // start the manager + pRtm = ALLOC( Rtm_Man_t, 1 ); + memset( pRtm, 0, sizeof(Rtm_Man_t) ); + // perform initializations + pRtm->vObjs = Vec_PtrAlloc( Aig_ManObjNum(p) ); + pRtm->vPis = Vec_PtrAlloc( Aig_ManPiNum(p) ); + pRtm->vPos = Vec_PtrAlloc( Aig_ManPoNum(p) ); + pRtm->pMem = Aig_MmFlexStart(); + return pRtm; +} + +/**Function************************************************************* + + Synopsis [Allocates the retiming manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ManFree( Rtm_Man_t * p ) +{ + Vec_PtrFree( p->vObjs ); + Vec_PtrFree( p->vPis ); + Vec_PtrFree( p->vPos ); + Aig_MmFlexStop( p->pMem, 0 ); + FREE( p->pExtra ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Counts the maximum number of latches on an edge.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ManLatchMax( Rtm_Man_t * p ) +{ + Rtm_Obj_t * pObj; + Rtm_Edg_t * pEdge; + int nLatchMax = 0, i, k;//, c, Val; + Rtm_ManForEachObj( p, pObj, i ) + Rtm_ObjForEachFaninEdge( pObj, pEdge, k ) + { +/* + for ( c = 0; c < (int)pEdge->nLats; c++ ) + { + Val = Rtm_ObjGetOne( p, pEdge, c ); + assert( Val == 1 || Val == 2 ); + } +*/ + nLatchMax = AIG_MAX( nLatchMax, (int)pEdge->nLats ); + } + return nLatchMax; +} + +/**Function************************************************************* + + Synopsis [Allocates the retiming object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rtm_Obj_t * Rtm_ObjAlloc( Rtm_Man_t * pRtm, int nFanins, int nFanouts ) +{ + Rtm_Obj_t * pObj; + int Size = sizeof(Rtm_Obj_t) + sizeof(Rtm_Obj_t *) * (nFanins + nFanouts) * 2; + pObj = (Rtm_Obj_t *)Aig_MmFlexEntryFetch( pRtm->pMem, Size ); + memset( pObj, 0, sizeof(Rtm_Obj_t) ); + pObj->Type = (int)(nFanins == 1 && nFanouts == 0); // mark PO + pObj->Num = nFanins; // temporary + pObj->Temp = nFanouts; + pObj->Id = Vec_PtrSize(pRtm->vObjs); + Vec_PtrPush( pRtm->vObjs, pObj ); + return pObj; +} + +/**Function************************************************************* + + Synopsis [Allocates the retiming object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjAddFanin( Rtm_Obj_t * pObj, Rtm_Obj_t * pFanin, int fCompl ) +{ + pObj->pFanio[ 2*pObj->nFanins ] = pFanin; + pObj->pFanio[ 2*pObj->nFanins + 1 ] = NULL; + pFanin->pFanio[ 2*(pFanin->Num + pFanin->nFanouts) ] = pObj; + pFanin->pFanio[ 2*(pFanin->Num + pFanin->nFanouts) + 1 ] = pObj->pFanio + 2*pObj->nFanins + 1; + if ( pObj->nFanins == 0 ) + pObj->fCompl0 = fCompl; + else if ( pObj->nFanins == 1 ) + pObj->fCompl1 = fCompl; + else + assert( 0 ); + pObj->nFanins++; + pFanin->nFanouts++; + assert( pObj->nFanins <= pObj->Num ); + assert( pFanin->nFanouts <= pFanin->Temp ); +} + +/**Function************************************************************* + + Synopsis [Check the possibility of forward retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ObjCheckRetimeFwd( Rtm_Obj_t * pObj ) +{ + Rtm_Edg_t * pEdge; + int i; + Rtm_ObjForEachFaninEdge( pObj, pEdge, i ) + if ( pEdge->nLats == 0 ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Check the possibility of forward retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ObjCheckRetimeBwd( Rtm_Obj_t * pObj ) +{ + Rtm_Edg_t * pEdge; + int i; + Rtm_ObjForEachFanoutEdge( pObj, pEdge, i ) + if ( pEdge->nLats == 0 ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Check the possibility of forward retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ObjGetDegreeFwd( Rtm_Obj_t * pObj ) +{ + Rtm_Obj_t * pFanin; + int i, Degree = 0; + Rtm_ObjForEachFanin( pObj, pFanin, i ) + Degree = AIG_MAX( Degree, (int)pFanin->Num ); + return Degree + 1; +} + +/**Function************************************************************* + + Synopsis [Check the possibility of forward retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ObjGetDegreeBwd( Rtm_Obj_t * pObj ) +{ + Rtm_Obj_t * pFanout; + int i, Degree = 0; + Rtm_ObjForEachFanout( pObj, pFanout, i ) + Degree = AIG_MAX( Degree, (int)pFanout->Num ); + return Degree + 1; +} + +/**Function************************************************************* + + Synopsis [Performs forward retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjRetimeFwd( Rtm_Man_t * pRtm, Rtm_Obj_t * pObj ) +{ + Rtm_Init_t ValTotal, ValCur; + Rtm_Edg_t * pEdge; + int i; + assert( Rtm_ObjCheckRetimeFwd(pObj) ); + // extract values and compute the result + ValTotal = RTM_VAL_ONE; + Rtm_ObjForEachFaninEdge( pObj, pEdge, i ) + { + ValCur = Rtm_ObjRemFirst( pRtm, pEdge ); + ValCur = Rtm_InitNotCond( ValCur, i? pObj->fCompl1 : pObj->fCompl0 ); + ValTotal = Rtm_InitAnd( ValTotal, ValCur ); + } + // insert the result in the fanout values + Rtm_ObjForEachFanoutEdge( pObj, pEdge, i ) + Rtm_ObjAddLast( pRtm, pEdge, ValTotal ); +} + +/**Function************************************************************* + + Synopsis [Performs forward retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjRetimeBwd( Rtm_Man_t * pRtm, Rtm_Obj_t * pObj ) +{ + Rtm_Edg_t * pEdge; + int i; + assert( Rtm_ObjCheckRetimeBwd(pObj) ); + // extract values and compute the result + Rtm_ObjForEachFanoutEdge( pObj, pEdge, i ) + Rtm_ObjRemLast( pRtm, pEdge ); + // insert the result in the fanout values + Rtm_ObjForEachFaninEdge( pObj, pEdge, i ) + Rtm_ObjAddFirst( pRtm, pEdge, RTM_VAL_VOID ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjMarkAutoFwd_rec( Rtm_Obj_t * pObj ) +{ + Rtm_Obj_t * pFanout; + int i; + if ( pObj->fAuto ) + return; + pObj->fAuto = 1; + Rtm_ObjForEachFanout( pObj, pFanout, i ) + Rtm_ObjMarkAutoFwd_rec( pFanout ); +} + +/**Function************************************************************* + + Synopsis [Marks the nodes unreachable from the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ManMarkAutoFwd( Rtm_Man_t * pRtm ) +{ + Rtm_Obj_t * pObjRtm; + int i, Counter = 0; + // mark nodes reachable from the PIs + pObjRtm = Vec_PtrEntry( pRtm->vObjs, 0 ); + Rtm_ObjMarkAutoFwd_rec( pObjRtm ); + Rtm_ManForEachPi( pRtm, pObjRtm, i ) + Rtm_ObjMarkAutoFwd_rec( pObjRtm ); + // count the number of autonomous nodes + Rtm_ManForEachObj( pRtm, pObjRtm, i ) + { + pObjRtm->fAuto = !pObjRtm->fAuto; + Counter += pObjRtm->fAuto; + } + // mark the fanins of the autonomous nodes + return Counter; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rtm_ObjMarkAutoBwd_rec( Rtm_Obj_t * pObj ) +{ + Rtm_Obj_t * pFanin; + int i; + if ( pObj->fAuto ) + return; + pObj->fAuto = 1; + Rtm_ObjForEachFanin( pObj, pFanin, i ) + Rtm_ObjMarkAutoBwd_rec( pFanin ); +} + +/**Function************************************************************* + + Synopsis [Marks the nodes unreachable from the POs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rtm_ManMarkAutoBwd( Rtm_Man_t * pRtm ) +{ + Rtm_Obj_t * pObjRtm; + int i, Counter = 0; + // mark nodes reachable from the PIs + pObjRtm = Vec_PtrEntry( pRtm->vObjs, 0 ); + pObjRtm->fAuto = 1; + Rtm_ManForEachPi( pRtm, pObjRtm, i ) + pObjRtm->fAuto = 1; + Rtm_ManForEachPo( pRtm, pObjRtm, i ) + Rtm_ObjMarkAutoBwd_rec( pObjRtm ); + // count the number of autonomous nodes + Rtm_ManForEachObj( pRtm, pObjRtm, i ) + { + pObjRtm->fAuto = !pObjRtm->fAuto; + Counter += pObjRtm->fAuto; + } + // mark the fanins of the autonomous nodes + return Counter; +} + +/**Function************************************************************* + + Synopsis [Derive retiming manager from the given AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rtm_Man_t * Rtm_ManFromAig( Aig_Man_t * p ) +{ + Rtm_Man_t * pRtm; + Aig_Obj_t * pObj, * pObjLi, * pObjLo; + int i; + assert( Aig_ManRegNum(p) > 0 ); + assert( Aig_ManBufNum(p) == 0 ); + // allocate the manager + pRtm = Rtm_ManAlloc( p ); + // allocate objects + pObj = Aig_ManConst1(p); + pObj->pData = Rtm_ObjAlloc( pRtm, 0, pObj->nRefs ); + Aig_ManForEachPiSeq( p, pObj, i ) + { + pObj->pData = Rtm_ObjAlloc( pRtm, 0, pObj->nRefs ); + Vec_PtrPush( pRtm->vPis, pObj->pData ); + } + Aig_ManForEachPoSeq( p, pObj, i ) + { + pObj->pData = Rtm_ObjAlloc( pRtm, 1, 0 ); + Vec_PtrPush( pRtm->vPos, pObj->pData ); + } + Aig_ManForEachLoSeq( p, pObj, i ) + pObj->pData = Rtm_ObjAlloc( pRtm, 1, pObj->nRefs ); + Aig_ManForEachLiSeq( p, pObj, i ) + pObj->pData = Rtm_ObjAlloc( pRtm, 1, 1 ); + Aig_ManForEachNode( p, pObj, i ) + pObj->pData = Rtm_ObjAlloc( pRtm, 2, pObj->nRefs ); + // connect objects + Aig_ManForEachPoSeq( p, pObj, i ) + Rtm_ObjAddFanin( pObj->pData, Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) ); + Aig_ManForEachLiSeq( p, pObj, i ) + Rtm_ObjAddFanin( pObj->pData, Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + Rtm_ObjAddFanin( pObjLo->pData, pObjLi->pData, 0 ); + Aig_ManForEachNode( p, pObj, i ) + { + Rtm_ObjAddFanin( pObj->pData, Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) ); + Rtm_ObjAddFanin( pObj->pData, Aig_ObjFanin1(pObj)->pData, Aig_ObjFaninC1(pObj) ); + } + return pRtm; +} + +/**Function************************************************************* + + Synopsis [Derive AIG manager after retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Rtm_ManToAig_rec( Aig_Man_t * pNew, Rtm_Man_t * pRtm, Rtm_Obj_t * pObjRtm, int * pLatches ) +{ + Rtm_Edg_t * pEdge; + Aig_Obj_t * pRes, * pFanin; + int k, Val; + if ( pObjRtm->pCopy ) + return pObjRtm->pCopy; + // get the inputs + pRes = Aig_ManConst1( pNew ); + Rtm_ObjForEachFaninEdge( pObjRtm, pEdge, k ) + { + if ( pEdge->nLats == 0 ) + pFanin = Rtm_ManToAig_rec( pNew, pRtm, Rtm_ObjFanin(pObjRtm, k), pLatches ); + else + { + Val = Rtm_ObjGetFirst( pRtm, pEdge ); + pFanin = Aig_ManPi( pNew, pLatches[2*pObjRtm->Id + k] + pEdge->nLats - 1 ); + pFanin = Aig_NotCond( pFanin, Val == RTM_VAL_ONE ); + } + pFanin = Aig_NotCond( pFanin, k ? pObjRtm->fCompl1 : pObjRtm->fCompl0 ); + pRes = Aig_And( pNew, pRes, pFanin ); + } + return pObjRtm->pCopy = pRes; +} + +/**Function************************************************************* + + Synopsis [Derive AIG manager after retiming.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Rtm_ManToAig( Rtm_Man_t * pRtm ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObjNew; + Rtm_Obj_t * pObjRtm; + Rtm_Edg_t * pEdge; + int i, k, m, Val, nLatches, * pLatches; + // count latches and mark the first latch on each edge + pLatches = ALLOC( int, 2 * Vec_PtrSize(pRtm->vObjs) ); + nLatches = 0; + Rtm_ManForEachObj( pRtm, pObjRtm, i ) + Rtm_ObjForEachFaninEdge( pObjRtm, pEdge, k ) + { + pLatches[2*pObjRtm->Id + k] = Vec_PtrSize(pRtm->vPis) + nLatches; + nLatches += pEdge->nLats; + } + // create the new manager + pNew = Aig_ManStart( Vec_PtrSize(pRtm->vObjs) + nLatches ); + // create PIs/POs and latches + pObjRtm = Vec_PtrEntry( pRtm->vObjs, 0 ); + pObjRtm->pCopy = Aig_ManConst1(pNew); + Rtm_ManForEachPi( pRtm, pObjRtm, i ) + pObjRtm->pCopy = Aig_ObjCreatePi(pNew); + for ( i = 0; i < nLatches; i++ ) + Aig_ObjCreatePi(pNew); + // create internal nodes + Rtm_ManForEachObj( pRtm, pObjRtm, i ) + Rtm_ManToAig_rec( pNew, pRtm, pObjRtm, pLatches ); + // create POs + Rtm_ManForEachPo( pRtm, pObjRtm, i ) + Aig_ObjCreatePo( pNew, pObjRtm->pCopy ); + // connect latches + Rtm_ManForEachObj( pRtm, pObjRtm, i ) + Rtm_ObjForEachFaninEdge( pObjRtm, pEdge, k ) + { + if ( pEdge->nLats == 0 ) + continue; + pObjNew = Rtm_ObjFanin( pObjRtm, k )->pCopy; + for ( m = 0; m < (int)pEdge->nLats; m++ ) + { + Val = Rtm_ObjGetOne( pRtm, pEdge, pEdge->nLats - 1 - m ); + assert( Val == RTM_VAL_ZERO || Val == RTM_VAL_ONE || Val == RTM_VAL_VOID ); + pObjNew = Aig_NotCond( pObjNew, Val == RTM_VAL_ONE ); + Aig_ObjCreatePo( pNew, pObjNew ); + pObjNew = Aig_ManPi( pNew, pLatches[2*pObjRtm->Id + k] + m ); + pObjNew = Aig_NotCond( pObjNew, Val == RTM_VAL_ONE ); + } +// assert( Aig_Regular(pObjNew)->nRefs > 0 ); + } + free( pLatches ); + pNew->nRegs = nLatches; + // remove useless nodes + Aig_ManCleanup( pNew ); + if ( !Aig_ManCheck( pNew ) ) + printf( "Rtm_ManToAig: The network check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Performs forward retiming with the given limit on depth.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Rtm_ManRetime( Aig_Man_t * p, int fForward, int nStepsMax, int fVerbose ) +{ + Vec_Ptr_t * vQueue; + Aig_Man_t * pNew; + Rtm_Man_t * pRtm; + Rtm_Obj_t * pObj, * pNext; + Aig_Obj_t * pObjAig; + int i, k, nAutos, Degree, DegreeMax = 0; + int clk; + + // create the retiming manager +clk = clock(); + pRtm = Rtm_ManFromAig( p ); + // set registers + Aig_ManForEachLoSeq( p, pObjAig, i ) + Rtm_ObjAddFirst( pRtm, Rtm_ObjEdge(pObjAig->pData, 0), fForward? RTM_VAL_ZERO : RTM_VAL_VOID ); + // detect and mark the autonomous components + if ( fForward ) + nAutos = Rtm_ManMarkAutoFwd( pRtm ); + else + nAutos = Rtm_ManMarkAutoBwd( pRtm ); + if ( fVerbose ) + { + printf( "Detected %d autonomous objects. ", nAutos ); + PRT( "Time", clock() - clk ); + } + + // set the current retiming number + Rtm_ManForEachObj( pRtm, pObj, i ) + { + assert( pObj->nFanins == pObj->Num ); + assert( pObj->nFanouts == pObj->Temp ); + pObj->Num = 0; + } + +clk = clock(); + // put the LOs on the queue + vQueue = Vec_PtrAlloc( 1000 ); + if ( fForward ) + { + Aig_ManForEachLoSeq( p, pObjAig, i ) + { + pObj = pObjAig->pData; + if ( pObj->fAuto ) + continue; + pObj->fMark = 1; + Vec_PtrPush( vQueue, pObj ); + } + } + else + { + Aig_ManForEachLiSeq( p, pObjAig, i ) + { + pObj = pObjAig->pData; + if ( pObj->fAuto ) + continue; + pObj->fMark = 1; + Vec_PtrPush( vQueue, pObj ); + } + } + // perform retiming + DegreeMax = 0; + Vec_PtrForEachEntry( vQueue, pObj, i ) + { + pObj->fMark = 0; + // retime the node + if ( fForward ) + { + Rtm_ObjRetimeFwd( pRtm, pObj ); + // check if its fanouts should be retimed + Rtm_ObjForEachFanout( pObj, pNext, k ) + { + if ( pNext->fMark ) // skip aleady scheduled + continue; + if ( pNext->Type ) // skip POs + continue; + if ( !Rtm_ObjCheckRetimeFwd( pNext ) ) // skip non-retimable + continue; + Degree = Rtm_ObjGetDegreeFwd( pNext ); + DegreeMax = AIG_MAX( DegreeMax, Degree ); + if ( Degree > nStepsMax ) // skip nodes with high degree + continue; + pNext->fMark = 1; + pNext->Num = Degree; + Vec_PtrPush( vQueue, pNext ); + } + } + else + { + Rtm_ObjRetimeBwd( pRtm, pObj ); + // check if its fanouts should be retimed + Rtm_ObjForEachFanin( pObj, pNext, k ) + { + if ( pNext->fMark ) // skip aleady scheduled + continue; + if ( pNext->nFanins == 0 ) // skip PIs + continue; + if ( !Rtm_ObjCheckRetimeBwd( pNext ) ) // skip non-retimable + continue; + Degree = Rtm_ObjGetDegreeBwd( pNext ); + DegreeMax = AIG_MAX( DegreeMax, Degree ); + if ( Degree > nStepsMax ) // skip nodes with high degree + continue; + pNext->fMark = 1; + pNext->Num = Degree; + Vec_PtrPush( vQueue, pNext ); + } + } + } + + if ( fVerbose ) + { + printf( "Performed %d %s latch moves of max depth %d and max latch count %d.\n", + Vec_PtrSize(vQueue), fForward? "fwd":"bwd", DegreeMax, Rtm_ManLatchMax(pRtm) ); + printf( "Memory usage = %d. ", pRtm->nExtraCur ); + PRT( "Time", clock() - clk ); + } + Vec_PtrFree( vQueue ); + + // get the new manager + pNew = Rtm_ManToAig( pRtm ); + pNew->pName = Aig_UtilStrsav( p->pName ); + Rtm_ManFree( pRtm ); + // group the registers +clk = clock(); + pNew = Aig_ManReduceLaches( pNew, fVerbose ); + if ( fVerbose ) + { + PRT( "Register sharing time", clock() - clk ); + } + return pNew; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigScl.c b/src/aig/aig/aigScl.c new file mode 100644 index 00000000..aae088a3 --- /dev/null +++ b/src/aig/aig/aigScl.c @@ -0,0 +1,399 @@ +/**CFile**************************************************************** + + FileName [aigScl.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Sequential cleanup.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigScl.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Remaps the manager.] + + Description [Map in the array specifies for each CI nodes the node that + should be used after remapping.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManRemap( Aig_Man_t * p, Vec_Ptr_t * vMap ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj, * pObjMapped; + int i; + // create the new manager + pNew = Aig_ManStart( Aig_ManObjNumMax(p) ); + pNew->pName = Aig_UtilStrsav( p->pName ); + pNew->nRegs = p->nRegs; + pNew->nAsserts = p->nAsserts; + if ( p->vFlopNums ) + pNew->vFlopNums = Vec_IntDup( p->vFlopNums ); + // create the PIs + Aig_ManCleanData( p ); + Aig_ManConst1(p)->pData = Aig_ManConst1(pNew); + Aig_ManForEachPi( p, pObj, i ) + pObj->pData = Aig_ObjCreatePi(pNew); + // implement the mapping + Aig_ManForEachPi( p, pObj, i ) + { + pObjMapped = Vec_PtrEntry( vMap, i ); + pObj->pData = Aig_NotCond( Aig_Regular(pObjMapped)->pData, Aig_IsComplement(pObjMapped) ); + } + // duplicate internal nodes + Aig_ManForEachObj( p, pObj, i ) + if ( Aig_ObjIsBuf(pObj) ) + pObj->pData = Aig_ObjChild0Copy(pObj); + else if ( Aig_ObjIsNode(pObj) ) + pObj->pData = Aig_And( pNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); + // add the POs + Aig_ManForEachPo( p, pObj, i ) + Aig_ObjCreatePo( pNew, Aig_ObjChild0Copy(pObj) ); + assert( Aig_ManNodeNum(p) >= Aig_ManNodeNum(pNew) ); + // check the resulting network + if ( !Aig_ManCheck(pNew) ) + printf( "Aig_ManDup(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManSeqCleanup_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + return; + Aig_ObjSetTravIdCurrent(p, pObj); + // collect latch input corresponding to unmarked PI (latch output) + if ( Aig_ObjIsPi(pObj) ) + { + Vec_PtrPush( vNodes, pObj->pNext ); + return; + } + if ( Aig_ObjIsPo(pObj) ) + { + Aig_ManSeqCleanup_rec( p, Aig_ObjFanin0(pObj), vNodes ); + return; + } + assert( Aig_ObjIsNode(pObj) ); + Aig_ManSeqCleanup_rec( p, Aig_ObjFanin0(pObj), vNodes ); + Aig_ManSeqCleanup_rec( p, Aig_ObjFanin1(pObj), vNodes ); +} + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManSeqCleanup( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes, * vCis, * vCos; + Aig_Obj_t * pObj, * pObjLi, * pObjLo; + int i, nTruePis, nTruePos; + assert( Aig_ManBufNum(p) == 0 ); + + // mark the PIs + Aig_ManIncrementTravId( p ); + Aig_ObjSetTravIdCurrent( p, Aig_ManConst1(p) ); + Aig_ManForEachPiSeq( p, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + + // prepare to collect nodes reachable from POs + vNodes = Vec_PtrAlloc( 100 ); + Aig_ManForEachPoSeq( p, pObj, i ) + Vec_PtrPush( vNodes, pObj ); + + // remember latch inputs in latch outputs + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + pObjLo->pNext = pObjLi; + // mark the nodes reachable from these nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + Aig_ManSeqCleanup_rec( p, pObj, vNodes ); + assert( Vec_PtrSize(vNodes) <= Aig_ManPoNum(p) ); + // clean latch output pointers + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + pObjLo->pNext = NULL; + + // if some latches are removed, update PIs/POs + if ( Vec_PtrSize(vNodes) < Aig_ManPoNum(p) ) + { + if ( p->vFlopNums ) + { + int nTruePos = Aig_ManPoNum(p)-Aig_ManRegNum(p); + // remember numbers of flops in the flops + Aig_ManForEachLiSeq( p, pObj, i ) + pObj->pNext = (Aig_Obj_t *)(long)Vec_IntEntry( p->vFlopNums, i - nTruePos ); + // reset the flop numbers + Vec_PtrForEachEntryStart( vNodes, pObj, i, nTruePos ) + Vec_IntWriteEntry( p->vFlopNums, i - nTruePos, (int)(long)pObj->pNext ); + Vec_IntShrink( p->vFlopNums, Vec_PtrSize(vNodes) - nTruePos ); + // clean the next pointer + Aig_ManForEachLiSeq( p, pObj, i ) + pObj->pNext = NULL; + } + // collect new CIs/COs + vCis = Vec_PtrAlloc( Aig_ManPiNum(p) ); + Aig_ManForEachPi( p, pObj, i ) + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + Vec_PtrPush( vCis, pObj ); + else + { + Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL ); +// Aig_ManRecycleMemory( p, pObj ); + } + vCos = Vec_PtrAlloc( Aig_ManPoNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + Vec_PtrPush( vCos, pObj ); + else + { + Aig_ObjDisconnect( p, pObj ); + Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL ); +// Aig_ManRecycleMemory( p, pObj ); + } + // remember the number of true PIs/POs + nTruePis = Aig_ManPiNum(p) - Aig_ManRegNum(p); + nTruePos = Aig_ManPoNum(p) - Aig_ManRegNum(p); + // set the new number of registers + p->nRegs -= Aig_ManPoNum(p) - Vec_PtrSize(vNodes); + // create new PIs/POs + assert( Vec_PtrSize(vCis) == nTruePis + p->nRegs ); + assert( Vec_PtrSize(vCos) == nTruePos + p->nRegs ); + Vec_PtrFree( p->vPis ); p->vPis = vCis; + Vec_PtrFree( p->vPos ); p->vPos = vCos; + p->nObjs[AIG_OBJ_PI] = Vec_PtrSize( p->vPis ); + p->nObjs[AIG_OBJ_PO] = Vec_PtrSize( p->vPos ); + + } + Vec_PtrFree( vNodes ); + // remove dangling nodes + return Aig_ManCleanup( p ); +} + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManCountMergeRegs( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pFanin; + int i, Counter = 0, Const0 = 0, Const1 = 0; + Aig_ManIncrementTravId( p ); + Aig_ManForEachLiSeq( p, pObj, i ) + { + pFanin = Aig_ObjFanin0(pObj); + if ( Aig_ObjIsConst1(pFanin) ) + { + if ( Aig_ObjFaninC0(pObj) ) + Const0++; + else + Const1++; + } + if ( Aig_ObjIsTravIdCurrent(p, pFanin) ) + continue; + Aig_ObjSetTravIdCurrent(p, pFanin); + Counter++; + } + printf( "Regs = %d. Fanins = %d. Const0 = %d. Const1 = %d.\n", + Aig_ManRegNum(p), Counter, Const0, Const1 ); + return 0; +} + + +/**Function************************************************************* + + Synopsis [Checks how many latches can be reduced.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManReduceLachesCount( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pFanin; + int i, Counter = 0, Diffs = 0; + assert( Aig_ManRegNum(p) > 0 ); + Aig_ManForEachObj( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); + Aig_ManForEachLiSeq( p, pObj, i ) + { + pFanin = Aig_ObjFanin0(pObj); + if ( Aig_ObjFaninC0(pObj) ) + { + if ( pFanin->fMarkB ) + Counter++; + else + pFanin->fMarkB = 1; + } + else + { + if ( pFanin->fMarkA ) + Counter++; + else + pFanin->fMarkA = 1; + } + } + // count fanins that have both attributes + Aig_ManForEachLiSeq( p, pObj, i ) + { + pFanin = Aig_ObjFanin0(pObj); + Diffs += pFanin->fMarkA && pFanin->fMarkB; + pFanin->fMarkA = pFanin->fMarkB = 0; + } +// printf( "Diffs = %d.\n", Diffs ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Reduces the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManReduceLachesOnce( Aig_Man_t * p ) +{ + Vec_Ptr_t * vMap; + Aig_Obj_t * pObj, * pObjLi, * pObjLo, * pFanin; + int * pMapping, i; + // start mapping by adding the true PIs + vMap = Vec_PtrAlloc( Aig_ManPiNum(p) ); + Aig_ManForEachPiSeq( p, pObj, i ) + Vec_PtrPush( vMap, pObj ); + // create mapping of fanin nodes into the corresponding latch outputs + pMapping = ALLOC( int, 2 * Aig_ManObjNumMax(p) ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + { + pFanin = Aig_ObjFanin0(pObjLi); + if ( Aig_ObjFaninC0(pObjLi) ) + { + if ( pFanin->fMarkB ) + { + Vec_PtrPush( vMap, Aig_ManLo(p, pMapping[2*pFanin->Id + 1]) ); + } + else + { + pFanin->fMarkB = 1; + pMapping[2*pFanin->Id + 1] = i; + Vec_PtrPush( vMap, pObjLo ); + } + } + else + { + if ( pFanin->fMarkA ) + { + Vec_PtrPush( vMap, Aig_ManLo(p, pMapping[2*pFanin->Id]) ); + } + else + { + pFanin->fMarkA = 1; + pMapping[2*pFanin->Id] = i; + Vec_PtrPush( vMap, pObjLo ); + } + } + } + free( pMapping ); + Aig_ManForEachLiSeq( p, pObj, i ) + { + pFanin = Aig_ObjFanin0(pObj); + pFanin->fMarkA = pFanin->fMarkB = 0; + } + return vMap; +} + +/**Function************************************************************* + + Synopsis [Reduces the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManReduceLaches( Aig_Man_t * p, int fVerbose ) +{ + Aig_Man_t * pTemp; + Vec_Ptr_t * vMap; + int nSaved, nCur; + for ( nSaved = 0; (nCur = Aig_ManReduceLachesCount(p)); nSaved += nCur ) + { + if ( fVerbose ) + { + printf( "Saved = %5d. ", nCur ); + printf( "RBeg = %5d. NBeg = %6d. ", Aig_ManRegNum(p), Aig_ManNodeNum(p) ); + } + vMap = Aig_ManReduceLachesOnce( p ); + p = Aig_ManRemap( pTemp = p, vMap ); + Aig_ManStop( pTemp ); + Vec_PtrFree( vMap ); + Aig_ManSeqCleanup( p ); + if ( fVerbose ) + { + printf( "REnd = %5d. NEnd = %6d. ", Aig_ManRegNum(p), Aig_ManNodeNum(p) ); + printf( "\n" ); + } + if ( p->nRegs == 0 ) + break; + } + return p; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigSeq.c b/src/aig/aig/aigSeq.c new file mode 100644 index 00000000..daafeab1 --- /dev/null +++ b/src/aig/aig/aigSeq.c @@ -0,0 +1,502 @@ +/**CFile**************************************************************** + + FileName [aigSeq.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Sequential strashing.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigSeq.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Converts combinational AIG manager into a sequential one.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManSeqStrashConvert( Aig_Man_t * p, int nLatches, int * pInits ) +{ + Aig_Obj_t * pObjLi, * pObjLo, * pLatch; + int i; + assert( Vec_PtrSize( p->vBufs ) == 0 ); + // collect the POs to be converted into latches + for ( i = 0; i < nLatches; i++ ) + { + // get the corresponding PI/PO pair + pObjLi = Aig_ManPo( p, Aig_ManPoNum(p) - nLatches + i ); + pObjLo = Aig_ManPi( p, Aig_ManPiNum(p) - nLatches + i ); + // create latch + pLatch = Aig_Latch( p, Aig_ObjChild0(pObjLi), pInits? pInits[i] : 0 ); + // recycle the old PO object + Aig_ObjDisconnect( p, pObjLi ); + Vec_PtrWriteEntry( p->vObjs, pObjLi->Id, NULL ); + Aig_ManRecycleMemory( p, pObjLi ); + // convert the corresponding PI to be a buffer and connect it to the latch + pObjLo->Type = AIG_OBJ_BUF; + Aig_ObjConnect( p, pObjLo, pLatch, NULL ); + // save the buffer +// Vec_PtrPush( p->vBufs, pObjLo ); + } + // shrink the arrays + Vec_PtrShrink( p->vPis, Aig_ManPiNum(p) - nLatches ); + Vec_PtrShrink( p->vPos, Aig_ManPoNum(p) - nLatches ); + // update the counters of different objects + p->nObjs[AIG_OBJ_PI] -= nLatches; + p->nObjs[AIG_OBJ_PO] -= nLatches; + p->nObjs[AIG_OBJ_BUF] += nLatches; +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDfsSeq_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( pObj == NULL ) + return; + if ( Aig_ObjIsTravIdCurrent( p, pObj ) ) + return; + Aig_ObjSetTravIdCurrent( p, pObj ); + if ( Aig_ObjIsPi(pObj) || Aig_ObjIsConst1(pObj) ) + return; + Aig_ManDfsSeq_rec( p, Aig_ObjFanin0(pObj), vNodes ); + Aig_ManDfsSeq_rec( p, Aig_ObjFanin1(pObj), vNodes ); +// if ( (Aig_ObjFanin0(pObj) == NULL || Aig_ObjIsBuf(Aig_ObjFanin0(pObj))) && +// (Aig_ObjFanin1(pObj) == NULL || Aig_ObjIsBuf(Aig_ObjFanin1(pObj))) ) + Vec_PtrPush( vNodes, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDfsSeq( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + Aig_ManIncrementTravId( p ); + vNodes = Vec_PtrAlloc( Aig_ManNodeNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + Aig_ManDfsSeq_rec( p, Aig_ObjFanin0(pObj), vNodes ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDfsUnreach_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( pObj == NULL ) + return; + if ( Aig_ObjIsTravIdPrevious(p, pObj) || Aig_ObjIsTravIdCurrent(p, pObj) ) + return; + Aig_ObjSetTravIdPrevious( p, pObj ); // assume unknown + Aig_ManDfsUnreach_rec( p, Aig_ObjFanin0(pObj), vNodes ); + Aig_ManDfsUnreach_rec( p, Aig_ObjFanin1(pObj), vNodes ); + if ( Aig_ObjIsTravIdPrevious(p, Aig_ObjFanin0(pObj)) && + (Aig_ObjFanin1(pObj) == NULL || Aig_ObjIsTravIdPrevious(p, Aig_ObjFanin1(pObj))) ) + Vec_PtrPush( vNodes, pObj ); + else + Aig_ObjSetTravIdCurrent( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes unreachable from PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManDfsUnreach( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj, * pFanin; + int i, k;//, RetValue; + // collect unreachable nodes + Aig_ManIncrementTravId( p ); + Aig_ManIncrementTravId( p ); + // mark the constant and PIs + Aig_ObjSetTravIdPrevious( p, Aig_ManConst1(p) ); + Aig_ManForEachPi( p, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + // curr marks visited nodes reachable from PIs + // prev marks visited nodes unreachable or unknown + + // collect the unreachable nodes + vNodes = Vec_PtrAlloc( 32 ); + Aig_ManForEachPo( p, pObj, i ) + Aig_ManDfsUnreach_rec( p, Aig_ObjFanin0(pObj), vNodes ); + + // refine resulting nodes + do + { + k = 0; + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + assert( Aig_ObjIsTravIdPrevious(p, pObj) ); + if ( Aig_ObjIsLatch(pObj) || Aig_ObjIsBuf(pObj) ) + { + pFanin = Aig_ObjFanin0(pObj); + assert( Aig_ObjIsTravIdPrevious(p, pFanin) || Aig_ObjIsTravIdCurrent(p, pFanin) ); + if ( Aig_ObjIsTravIdCurrent(p, pFanin) ) + { + Aig_ObjSetTravIdCurrent( p, pObj ); + continue; + } + } + else // AND gate + { + assert( Aig_ObjIsNode(pObj) ); + pFanin = Aig_ObjFanin0(pObj); + assert( Aig_ObjIsTravIdPrevious(p, pFanin) || Aig_ObjIsTravIdCurrent(p, pFanin) ); + if ( Aig_ObjIsTravIdCurrent(p, pFanin) ) + { + Aig_ObjSetTravIdCurrent( p, pObj ); + continue; + } + pFanin = Aig_ObjFanin1(pObj); + assert( Aig_ObjIsTravIdPrevious(p, pFanin) || Aig_ObjIsTravIdCurrent(p, pFanin) ); + if ( Aig_ObjIsTravIdCurrent(p, pFanin) ) + { + Aig_ObjSetTravIdCurrent( p, pObj ); + continue; + } + } + // write it back + Vec_PtrWriteEntry( vNodes, k++, pObj ); + } + Vec_PtrShrink( vNodes, k ); + } + while ( k < i ); + +// if ( Vec_PtrSize(vNodes) > 0 ) +// printf( "Found %d unreachable.\n", Vec_PtrSize(vNodes) ); + return vNodes; + +/* + // the resulting array contains all unreachable nodes except const 1 + if ( Vec_PtrSize(vNodes) == 0 ) + { + Vec_PtrFree( vNodes ); + return 0; + } + RetValue = Vec_PtrSize(vNodes); + + // mark these nodes + Aig_ManIncrementTravId( p ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + Aig_ObjSetTravIdCurrent( p, pObj ); + Vec_PtrFree( vNodes ); + return RetValue; +*/ +} + + +/**Function************************************************************* + + Synopsis [Removes nodes that do not fanout into POs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManRemoveUnmarked( Aig_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i, RetValue; + // collect unmarked nodes + vNodes = Vec_PtrAlloc( 100 ); + Aig_ManForEachObj( p, pObj, i ) + { + if ( Aig_ObjIsTerm(pObj) ) + continue; + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + continue; +//Aig_ObjPrintVerbose( pObj, 0 ); + Aig_ObjDisconnect( p, pObj ); + Vec_PtrPush( vNodes, pObj ); + } + if ( Vec_PtrSize(vNodes) == 0 ) + { + Vec_PtrFree( vNodes ); + return 0; + } + // remove the dangling objects + RetValue = Vec_PtrSize(vNodes); + Vec_PtrForEachEntry( vNodes, pObj, i ) + Aig_ObjDelete( p, pObj ); +// printf( "Removed %d dangling.\n", Vec_PtrSize(vNodes) ); + Vec_PtrFree( vNodes ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Rehashes the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManSeqRehashOne( Aig_Man_t * p, Vec_Ptr_t * vNodes, Vec_Ptr_t * vUnreach ) +{ + Aig_Obj_t * pObj, * pObjNew, * pFanin0, * pFanin1; + int i, RetValue = 0, Counter = 0;//, Counter2 = 0; + + // mark the unreachable nodes + Aig_ManIncrementTravId( p ); + Vec_PtrForEachEntry( vUnreach, pObj, i ) + Aig_ObjSetTravIdCurrent(p, pObj); +/* + // count the number of unreachable object connections + // that is the number of unreachable objects connected to main objects + Aig_ManForEachObj( p, pObj, i ) + { + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + continue; + + pFanin0 = Aig_ObjFanin0(pObj); + if ( pFanin0 == NULL ) + continue; + if ( Aig_ObjIsTravIdCurrent(p, pFanin0) ) + pFanin0->fMarkA = 1; + + pFanin1 = Aig_ObjFanin1(pObj); + if ( pFanin1 == NULL ) + continue; + if ( Aig_ObjIsTravIdCurrent(p, pFanin1) ) + pFanin1->fMarkA = 1; + } + + // count the objects + Aig_ManForEachObj( p, pObj, i ) + Counter2 += pObj->fMarkA, pObj->fMarkA = 0; + printf( "Connections = %d.\n", Counter2 ); +*/ + + // go through the nodes while skipping unreachable + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + // skip nodes unreachable from the PIs + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + continue; + // process the node + if ( Aig_ObjIsPo(pObj) ) + { + if ( !Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) ) + continue; + pFanin0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + Aig_ObjPatchFanin0( p, pObj, pFanin0 ); + continue; + } + if ( Aig_ObjIsLatch(pObj) ) + { + if ( !Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) ) + continue; + pObjNew = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + pObjNew = Aig_Latch( p, pObjNew, 0 ); + Aig_ObjReplace( p, pObj, pObjNew, 1, 0 ); + RetValue = 1; + Counter++; + continue; + } + if ( Aig_ObjIsNode(pObj) ) + { + if ( !Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) && !Aig_ObjIsBuf(Aig_ObjFanin1(pObj)) ) + continue; + pFanin0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + pFanin1 = Aig_ObjReal_rec( Aig_ObjChild1(pObj) ); + pObjNew = Aig_And( p, pFanin0, pFanin1 ); + Aig_ObjReplace( p, pObj, pObjNew, 1, 0 ); + RetValue = 1; + Counter++; + continue; + } + } +// printf( "Rehashings = %d.\n", Counter++ ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [If AIG contains buffers, this procedure removes them.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManRemoveBuffers( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pObjNew, * pFanin0, * pFanin1; + int i; + if ( Aig_ManBufNum(p) == 0 ) + return; + Aig_ManForEachObj( p, pObj, i ) + { + if ( Aig_ObjIsPo(pObj) ) + { + if ( !Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) ) + continue; + pFanin0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + Aig_ObjPatchFanin0( p, pObj, pFanin0 ); + } + else if ( Aig_ObjIsLatch(pObj) ) + { + if ( !Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) ) + continue; + pFanin0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + pObjNew = Aig_Latch( p, pFanin0, 0 ); + Aig_ObjReplace( p, pObj, pObjNew, 0, 0 ); + } + else if ( Aig_ObjIsAnd(pObj) ) + { + if ( !Aig_ObjIsBuf(Aig_ObjFanin0(pObj)) && !Aig_ObjIsBuf(Aig_ObjFanin1(pObj)) ) + continue; + pFanin0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + pFanin1 = Aig_ObjReal_rec( Aig_ObjChild1(pObj) ); + pObjNew = Aig_And( p, pFanin0, pFanin1 ); + Aig_ObjReplace( p, pObj, pObjNew, 0, 0 ); + } + } + assert( Aig_ManBufNum(p) == 0 ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManSeqStrash( Aig_Man_t * p, int nLatches, int * pInits ) +{ + Vec_Ptr_t * vNodes, * vUnreach; +// Aig_Obj_t * pObj, * pFanin; +// int i; + int Iter, RetValue = 1; + + // create latches out of the additional PI/PO pairs + Aig_ManSeqStrashConvert( p, nLatches, pInits ); + + // iteratively rehash the network + for ( Iter = 0; RetValue; Iter++ ) + { +// Aig_ManPrintStats( p ); +/* + Aig_ManForEachObj( p, pObj, i ) + { + assert( pObj->Type > 0 ); + pFanin = Aig_ObjFanin0(pObj); + assert( pFanin == NULL || pFanin->Type > 0 ); + pFanin = Aig_ObjFanin1(pObj); + assert( pFanin == NULL || pFanin->Type > 0 ); + } +*/ + // mark nodes unreachable from the PIs + vUnreach = Aig_ManDfsUnreach( p ); + if ( Iter == 0 && Vec_PtrSize(vUnreach) > 0 ) + printf( "Unreachable objects = %d.\n", Vec_PtrSize(vUnreach) ); + // collect nodes reachable from the POs + vNodes = Aig_ManDfsSeq( p ); + // remove nodes unreachable from the POs + if ( Iter == 0 ) + Aig_ManRemoveUnmarked( p ); + // continue rehashing as long as there are changes + RetValue = Aig_ManSeqRehashOne( p, vNodes, vUnreach ); + Vec_PtrFree( vNodes ); + Vec_PtrFree( vUnreach ); + } + + // perform the final cleanup + Aig_ManIncrementTravId( p ); + vNodes = Aig_ManDfsSeq( p ); + Aig_ManRemoveUnmarked( p ); + Vec_PtrFree( vNodes ); + // remove buffers if they are left +// Aig_ManRemoveBuffers( p ); + + // clean up + if ( !Aig_ManCheck( p ) ) + { + printf( "Aig_ManSeqStrash: The network check has failed.\n" ); + return 0; + } + return 1; + +} + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigShow.c b/src/aig/aig/aigShow.c new file mode 100644 index 00000000..96b0e37f --- /dev/null +++ b/src/aig/aig/aigShow.c @@ -0,0 +1,356 @@ +/**CFile**************************************************************** + + FileName [ivyShow.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Visualization of HAIG.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyShow.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Writes the graph structure of AIG for DOT.] + + Description [Useful for graph visualization using tools such as GraphViz: + http://www.graphviz.org/] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_WriteDotAig( Aig_Man_t * pMan, char * pFileName, int fHaig, Vec_Ptr_t * vBold ) +{ + FILE * pFile; + Aig_Obj_t * pNode;//, * pTemp, * pPrev; + int LevelMax, Level, i; + + if ( Aig_ManNodeNum(pMan) > 200 ) + { + fprintf( stdout, "Cannot visualize AIG with more than 200 nodes.\n" ); + return; + } + if ( (pFile = fopen( pFileName, "w" )) == NULL ) + { + fprintf( stdout, "Cannot open the intermediate file \"%s\".\n", pFileName ); + return; + } + + // mark the nodes + if ( vBold ) + Vec_PtrForEachEntry( vBold, pNode, i ) + pNode->fMarkB = 1; + + // compute levels +// LevelMax = 1 + Aig_ManSetLevels( pMan, fHaig ); + LevelMax = 1 + Aig_ManLevels( pMan ); + Aig_ManForEachPo( pMan, pNode, i ) + pNode->Level = LevelMax; + + // write the DOT header + fprintf( pFile, "# %s\n", "AIG structure generated by IVY package" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "digraph AIG {\n" ); + fprintf( pFile, "size = \"7.5,10\";\n" ); +// fprintf( pFile, "ranksep = 0.5;\n" ); +// fprintf( pFile, "nodesep = 0.5;\n" ); + fprintf( pFile, "center = true;\n" ); +// fprintf( pFile, "orientation = landscape;\n" ); +// fprintf( pFile, "edge [fontsize = 10];\n" ); +// fprintf( pFile, "edge [dir = none];\n" ); + fprintf( pFile, "edge [dir = back];\n" ); + fprintf( pFile, "\n" ); + + // labels on the left of the picture + fprintf( pFile, "{\n" ); + fprintf( pFile, " node [shape = plaintext];\n" ); + fprintf( pFile, " edge [style = invis];\n" ); + fprintf( pFile, " LevelTitle1 [label=\"\"];\n" ); + fprintf( pFile, " LevelTitle2 [label=\"\"];\n" ); + // generate node names with labels + for ( Level = LevelMax; Level >= 0; Level-- ) + { + // the visible node name + fprintf( pFile, " Level%d", Level ); + fprintf( pFile, " [label = " ); + // label name + fprintf( pFile, "\"" ); + fprintf( pFile, "\"" ); + fprintf( pFile, "];\n" ); + } + + // genetate the sequence of visible/invisible nodes to mark levels + fprintf( pFile, " LevelTitle1 -> LevelTitle2 ->" ); + for ( Level = LevelMax; Level >= 0; Level-- ) + { + // the visible node name + fprintf( pFile, " Level%d", Level ); + // the connector + if ( Level != 0 ) + fprintf( pFile, " ->" ); + else + fprintf( pFile, ";" ); + } + fprintf( pFile, "\n" ); + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate title box on top + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + fprintf( pFile, " LevelTitle1;\n" ); + fprintf( pFile, " title1 [shape=plaintext,\n" ); + fprintf( pFile, " fontsize=20,\n" ); + fprintf( pFile, " fontname = \"Times-Roman\",\n" ); + fprintf( pFile, " label=\"" ); + fprintf( pFile, "%s", "AIG structure visualized by ABC" ); + fprintf( pFile, "\\n" ); + fprintf( pFile, "Benchmark \\\"%s\\\". ", "aig" ); +// fprintf( pFile, "Time was %s. ", Extra_TimeStamp() ); + fprintf( pFile, "\"\n" ); + fprintf( pFile, " ];\n" ); + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate statistics box + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + fprintf( pFile, " LevelTitle2;\n" ); + fprintf( pFile, " title2 [shape=plaintext,\n" ); + fprintf( pFile, " fontsize=18,\n" ); + fprintf( pFile, " fontname = \"Times-Roman\",\n" ); + fprintf( pFile, " label=\"" ); + fprintf( pFile, "The set contains %d logic nodes and spans %d levels.", Aig_ManNodeNum(pMan), LevelMax ); + fprintf( pFile, "\\n" ); + fprintf( pFile, "\"\n" ); + fprintf( pFile, " ];\n" ); + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate the COs + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + // the labeling node of this level + fprintf( pFile, " Level%d;\n", LevelMax ); + // generate the CO nodes + Aig_ManForEachPo( pMan, pNode, i ) + { +/* + if ( fHaig || pNode->pEquiv == NULL ) + fprintf( pFile, " Node%d%s [label = \"%d%s\"", pNode->Id, + (Aig_ObjIsLatch(pNode)? "_in":""), pNode->Id, (Aig_ObjIsLatch(pNode)? "_in":"") ); + else + fprintf( pFile, " Node%d%s [label = \"%d%s(%d%s)\"", pNode->Id, + (Aig_ObjIsLatch(pNode)? "_in":""), pNode->Id, (Aig_ObjIsLatch(pNode)? "_in":""), + Aig_Regular(pNode->pEquiv)->Id, Aig_IsComplement(pNode->pEquiv)? "\'":"" ); +*/ + fprintf( pFile, " Node%d [label = \"%d\"", pNode->Id, pNode->Id ); + + fprintf( pFile, ", shape = %s", (Aig_ObjIsLatch(pNode)? "box":"invtriangle") ); + fprintf( pFile, ", color = coral, fillcolor = coral" ); + fprintf( pFile, "];\n" ); + } + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate nodes of each rank + for ( Level = LevelMax - 1; Level > 0; Level-- ) + { + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + // the labeling node of this level + fprintf( pFile, " Level%d;\n", Level ); + Aig_ManForEachObj( pMan, pNode, i ) + { + if ( (int)pNode->Level != Level ) + continue; +/* + if ( fHaig || pNode->pEquiv == NULL ) + fprintf( pFile, " Node%d [label = \"%d\"", pNode->Id, pNode->Id ); + else + fprintf( pFile, " Node%d [label = \"%d(%d%s)\"", pNode->Id, pNode->Id, + Aig_Regular(pNode->pEquiv)->Id, Aig_IsComplement(pNode->pEquiv)? "\'":"" ); +*/ + fprintf( pFile, " Node%d [label = \"%d\"", pNode->Id, pNode->Id ); + + fprintf( pFile, ", shape = ellipse" ); + if ( vBold && pNode->fMarkB ) + fprintf( pFile, ", style = filled" ); + fprintf( pFile, "];\n" ); + } + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + } + + // generate the CI nodes + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + // the labeling node of this level + fprintf( pFile, " Level%d;\n", 0 ); + // generate constant node + if ( Aig_ObjRefs(Aig_ManConst1(pMan)) > 0 ) + { + pNode = Aig_ManConst1(pMan); + // check if the costant node is present + fprintf( pFile, " Node%d [label = \"Const1\"", pNode->Id ); + fprintf( pFile, ", shape = ellipse" ); + fprintf( pFile, ", color = coral, fillcolor = coral" ); + fprintf( pFile, "];\n" ); + } + // generate the CI nodes + Aig_ManForEachPi( pMan, pNode, i ) + { +/* + if ( fHaig || pNode->pEquiv == NULL ) + fprintf( pFile, " Node%d%s [label = \"%d%s\"", pNode->Id, + (Aig_ObjIsLatch(pNode)? "_out":""), pNode->Id, (Aig_ObjIsLatch(pNode)? "_out":"") ); + else + fprintf( pFile, " Node%d%s [label = \"%d%s(%d%s)\"", pNode->Id, + (Aig_ObjIsLatch(pNode)? "_out":""), pNode->Id, (Aig_ObjIsLatch(pNode)? "_out":""), + Aig_Regular(pNode->pEquiv)->Id, Aig_IsComplement(pNode->pEquiv)? "\'":"" ); +*/ + fprintf( pFile, " Node%d [label = \"%d\"", pNode->Id, pNode->Id ); + + fprintf( pFile, ", shape = %s", (Aig_ObjIsLatch(pNode)? "box":"triangle") ); + fprintf( pFile, ", color = coral, fillcolor = coral" ); + fprintf( pFile, "];\n" ); + } + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate invisible edges from the square down + fprintf( pFile, "title1 -> title2 [style = invis];\n" ); + Aig_ManForEachPo( pMan, pNode, i ) + fprintf( pFile, "title2 -> Node%d%s [style = invis];\n", pNode->Id, (Aig_ObjIsLatch(pNode)? "_in":"") ); + + // generate edges + Aig_ManForEachObj( pMan, pNode, i ) + { + if ( !Aig_ObjIsNode(pNode) && !Aig_ObjIsPo(pNode) && !Aig_ObjIsBuf(pNode) ) + continue; + // generate the edge from this node to the next + fprintf( pFile, "Node%d%s", pNode->Id, (Aig_ObjIsLatch(pNode)? "_in":"") ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d%s", Aig_ObjFaninId0(pNode), (Aig_ObjIsLatch(Aig_ObjFanin0(pNode))? "_out":"") ); + fprintf( pFile, " [" ); + fprintf( pFile, "style = %s", Aig_ObjFaninC0(pNode)? "dotted" : "bold" ); +// if ( Aig_NtkIsSeq(pNode->pMan) && Seq_ObjFaninL0(pNode) > 0 ) +// fprintf( pFile, ", label = \"%s\"", Seq_ObjFaninGetInitPrintable(pNode,0) ); + fprintf( pFile, "]" ); + fprintf( pFile, ";\n" ); + if ( !Aig_ObjIsNode(pNode) ) + continue; + // generate the edge from this node to the next + fprintf( pFile, "Node%d", pNode->Id ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d%s", Aig_ObjFaninId1(pNode), (Aig_ObjIsLatch(Aig_ObjFanin1(pNode))? "_out":"") ); + fprintf( pFile, " [" ); + fprintf( pFile, "style = %s", Aig_ObjFaninC1(pNode)? "dotted" : "bold" ); +// if ( Aig_NtkIsSeq(pNode->pMan) && Seq_ObjFaninL1(pNode) > 0 ) +// fprintf( pFile, ", label = \"%s\"", Seq_ObjFaninGetInitPrintable(pNode,1) ); + fprintf( pFile, "]" ); + fprintf( pFile, ";\n" ); +/* + // generate the edges between the equivalent nodes + if ( fHaig && pNode->pEquiv && Aig_ObjRefs(pNode) > 0 ) + { + pPrev = pNode; + for ( pTemp = pNode->pEquiv; pTemp != pNode; pTemp = Aig_Regular(pTemp->pEquiv) ) + { + fprintf( pFile, "Node%d", pPrev->Id ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d", pTemp->Id ); + fprintf( pFile, " [style = %s]", Aig_IsComplement(pTemp->pEquiv)? "dotted" : "bold" ); + fprintf( pFile, ";\n" ); + pPrev = pTemp; + } + // connect the last node with the first + fprintf( pFile, "Node%d", pPrev->Id ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d", pNode->Id ); + fprintf( pFile, " [style = %s]", Aig_IsComplement(pPrev->pEquiv)? "dotted" : "bold" ); + fprintf( pFile, ";\n" ); + } +*/ + } + + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + fclose( pFile ); + + // unmark nodes + if ( vBold ) + Vec_PtrForEachEntry( vBold, pNode, i ) + pNode->fMarkB = 0; + + Aig_ManForEachPo( pMan, pNode, i ) + pNode->Level = Aig_ObjFanin0(pNode)->Level; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManShow( Aig_Man_t * pMan, int fHaig, Vec_Ptr_t * vBold ) +{ + extern void Abc_ShowFile( char * FileNameDot ); + static Counter = 0; + char FileNameDot[200]; + FILE * pFile; + // create the file name +// Aig_ShowGetFileName( pMan->pName, FileNameDot ); + sprintf( FileNameDot, "temp%02d.dot", Counter++ ); + // check that the file can be opened + if ( (pFile = fopen( FileNameDot, "w" )) == NULL ) + { + fprintf( stdout, "Cannot open the intermediate file \"%s\".\n", FileNameDot ); + return; + } + fclose( pFile ); + // generate the file + Aig_WriteDotAig( pMan, FileNameDot, fHaig, vBold ); + // visualize the file + Abc_ShowFile( FileNameDot ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigTable.c b/src/aig/aig/aigTable.c new file mode 100644 index 00000000..94593d70 --- /dev/null +++ b/src/aig/aig/aigTable.c @@ -0,0 +1,268 @@ +/**CFile**************************************************************** + + FileName [aigTable.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Structural hashing table.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigTable.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// hashing the node +static unsigned long Aig_Hash( Aig_Obj_t * pObj, int TableSize ) +{ + unsigned long Key = Aig_ObjIsExor(pObj) * 1699; + Key ^= Aig_ObjFanin0(pObj)->Id * 7937; + Key ^= Aig_ObjFanin1(pObj)->Id * 2971; + Key ^= Aig_ObjFaninC0(pObj) * 911; + Key ^= Aig_ObjFaninC1(pObj) * 353; + return Key % TableSize; +} + +// returns the place where this node is stored (or should be stored) +static Aig_Obj_t ** Aig_TableFind( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t ** ppEntry; + if ( Aig_ObjIsLatch(pObj) ) + { + assert( Aig_ObjChild0(pObj) && Aig_ObjChild1(pObj) == NULL ); + } + else + { + assert( Aig_ObjChild0(pObj) && Aig_ObjChild1(pObj) ); + assert( Aig_ObjFanin0(pObj)->Id < Aig_ObjFanin1(pObj)->Id ); + } + for ( ppEntry = p->pTable + Aig_Hash(pObj, p->nTableSize); *ppEntry; ppEntry = &(*ppEntry)->pNext ) + if ( *ppEntry == pObj ) + return ppEntry; + assert( *ppEntry == NULL ); + return ppEntry; +} + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Resizes the table.] + + Description [Typically this procedure should not be called.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TableResize( Aig_Man_t * p ) +{ + Aig_Obj_t * pEntry, * pNext; + Aig_Obj_t ** pTableOld, ** ppPlace; + int nTableSizeOld, Counter, i, clk; +clk = clock(); + // save the old table + pTableOld = p->pTable; + nTableSizeOld = p->nTableSize; + // get the new table + p->nTableSize = Aig_PrimeCudd( 2 * Aig_ManNodeNum(p) ); + p->pTable = ALLOC( Aig_Obj_t *, p->nTableSize ); + memset( p->pTable, 0, sizeof(Aig_Obj_t *) * p->nTableSize ); + // rehash the entries from the old table + Counter = 0; + for ( i = 0; i < nTableSizeOld; i++ ) + for ( pEntry = pTableOld[i], pNext = pEntry? pEntry->pNext : NULL; + pEntry; pEntry = pNext, pNext = pEntry? pEntry->pNext : NULL ) + { + // get the place where this entry goes in the table + ppPlace = Aig_TableFind( p, pEntry ); + assert( *ppPlace == NULL ); // should not be there + // add the entry to the list + *ppPlace = pEntry; + pEntry->pNext = NULL; + Counter++; + } + assert( Counter == Aig_ManNodeNum(p) ); +// printf( "Increasing the structural table size from %6d to %6d. ", nTableSizeOld, p->nTableSize ); +// PRT( "Time", clock() - clk ); + // replace the table and the parameters + free( pTableOld ); +} + +/**Function************************************************************* + + Synopsis [Checks if node with the given attributes is in the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_TableLookup( Aig_Man_t * p, Aig_Obj_t * pGhost ) +{ + Aig_Obj_t * pEntry; + assert( !Aig_IsComplement(pGhost) ); + if ( pGhost->Type == AIG_OBJ_LATCH ) + { + assert( Aig_ObjChild0(pGhost) && Aig_ObjChild1(pGhost) == NULL ); + if ( !Aig_ObjRefs(Aig_ObjFanin0(pGhost)) ) + return NULL; + } + else + { + assert( pGhost->Type == AIG_OBJ_AND ); + assert( Aig_ObjChild0(pGhost) && Aig_ObjChild1(pGhost) ); + assert( Aig_ObjFanin0(pGhost)->Id < Aig_ObjFanin1(pGhost)->Id ); + if ( !Aig_ObjRefs(Aig_ObjFanin0(pGhost)) || !Aig_ObjRefs(Aig_ObjFanin1(pGhost)) ) + return NULL; + } + for ( pEntry = p->pTable[Aig_Hash(pGhost, p->nTableSize)]; pEntry; pEntry = pEntry->pNext ) + { + if ( Aig_ObjChild0(pEntry) == Aig_ObjChild0(pGhost) && + Aig_ObjChild1(pEntry) == Aig_ObjChild1(pGhost) && + Aig_ObjType(pEntry) == Aig_ObjType(pGhost) ) + return pEntry; + } + return NULL; +} + +/**Function************************************************************* + + Synopsis [Checks if node with the given attributes is in the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_TableLookupTwo( Aig_Man_t * p, Aig_Obj_t * pFanin0, Aig_Obj_t * pFanin1 ) +{ + Aig_Obj_t * pGhost; + // consider simple cases + if ( pFanin0 == pFanin1 ) + return pFanin0; + if ( pFanin0 == Aig_Not(pFanin1) ) + return Aig_ManConst0(p); + if ( Aig_Regular(pFanin0) == Aig_ManConst1(p) ) + return pFanin0 == Aig_ManConst1(p) ? pFanin1 : Aig_ManConst0(p); + if ( Aig_Regular(pFanin1) == Aig_ManConst1(p) ) + return pFanin1 == Aig_ManConst1(p) ? pFanin0 : Aig_ManConst0(p); + pGhost = Aig_ObjCreateGhost( p, pFanin0, pFanin1, AIG_OBJ_AND ); + return Aig_TableLookup( p, pGhost ); +} + +/**Function************************************************************* + + Synopsis [Adds the new node to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TableInsert( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t ** ppPlace; + assert( !Aig_IsComplement(pObj) ); + assert( Aig_TableLookup(p, pObj) == NULL ); + if ( (pObj->Id & 0xFF) == 0 && 2 * p->nTableSize < Aig_ManNodeNum(p) ) + Aig_TableResize( p ); + ppPlace = Aig_TableFind( p, pObj ); + assert( *ppPlace == NULL ); + *ppPlace = pObj; +} + +/**Function************************************************************* + + Synopsis [Deletes the node from the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TableDelete( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t ** ppPlace; + assert( !Aig_IsComplement(pObj) ); + ppPlace = Aig_TableFind( p, pObj ); + assert( *ppPlace == pObj ); // node should be in the table + // remove the node + *ppPlace = pObj->pNext; + pObj->pNext = NULL; +} + +/**Function************************************************************* + + Synopsis [Count the number of nodes in the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_TableCountEntries( Aig_Man_t * p ) +{ + Aig_Obj_t * pEntry; + int i, Counter = 0; + for ( i = 0; i < p->nTableSize; i++ ) + for ( pEntry = p->pTable[i]; pEntry; pEntry = pEntry->pNext ) + Counter++; + return Counter; +} + +/**Function******************************************************************** + + Synopsis [Profiles the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Aig_TableProfile( Aig_Man_t * p ) +{ + Aig_Obj_t * pEntry; + int i, Counter; + for ( i = 0; i < p->nTableSize; i++ ) + { + Counter = 0; + for ( pEntry = p->pTable[i]; pEntry; pEntry = pEntry->pNext ) + Counter++; + if ( Counter ) + printf( "%d ", Counter ); + } +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigTime.c b/src/aig/aig/aigTime.c new file mode 100644 index 00000000..42f5f575 --- /dev/null +++ b/src/aig/aig/aigTime.c @@ -0,0 +1,299 @@ +/**CFile**************************************************************** + + FileName [aigTime.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Representation of timing information.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigTime.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Aig_TBox_t_ Aig_TBox_t; +typedef struct Aig_TObj_t_ Aig_TObj_t; + +// timing manager +struct Aig_TMan_t_ +{ + Vec_Ptr_t * vBoxes; // the timing boxes + Aig_MmFlex_t * pMemObj; // memory manager for boxes + int nTravIds; // traversal ID of the manager + int nPis; // the number of PIs + int nPos; // the number of POs + Aig_TObj_t * pPis; // timing info for the PIs + Aig_TObj_t * pPos; // timing info for the POs +}; + +// timing box +struct Aig_TBox_t_ +{ + int iBox; // the unique ID of this box + int TravId; // traversal ID of this box + int nInputs; // the number of box inputs + int nOutputs; // the number of box outputs + int Inouts[0]; // the int numbers of PIs and POs +}; + +// timing object +struct Aig_TObj_t_ +{ + int iObj2Box; // mapping of the object into its box + float timeOffset; // the static timing of the node + float timeActual; // the actual timing of the node +}; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the network manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_TMan_t * Aig_TManStart( int nPis, int nPos ) +{ + Aig_TMan_t * p; + int i; + p = ALLOC( Aig_TMan_t, 1 ); + memset( p, 0, sizeof(Aig_TMan_t) ); + p->pMemObj = Aig_MmFlexStart(); + p->vBoxes = Vec_PtrAlloc( 100 ); + Vec_PtrPush( p->vBoxes, NULL ); + p->nPis = nPis; + p->nPos = nPos; + p->pPis = ALLOC( Aig_TObj_t, nPis ); + memset( p->pPis, 0, sizeof(Aig_TObj_t) * nPis ); + p->pPos = ALLOC( Aig_TObj_t, nPos ); + memset( p->pPos, 0, sizeof(Aig_TObj_t) * nPos ); + for ( i = 0; i < nPis; i++ ) + p->pPis[i].iObj2Box = -1; + for ( i = 0; i < nPos; i++ ) + p->pPos[i].iObj2Box = -1; + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the network manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManStop( Aig_TMan_t * p ) +{ + Vec_PtrFree( p->vBoxes ); + Aig_MmFlexStop( p->pMemObj, 0 ); + free( p->pPis ); + free( p->pPos ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Creates the new timing box.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManCreateBox( Aig_TMan_t * p, int * pPis, int nPis, int * pPos, int nPos, float * pPiTimes, float * pPoTimes ) +{ + Aig_TBox_t * pBox; + int i; + pBox = (Aig_TBox_t *)Aig_MmFlexEntryFetch( p->pMemObj, sizeof(Aig_TBox_t) + sizeof(int) * (nPis+nPos) ); + memset( pBox, 0, sizeof(Aig_TBox_t) ); + pBox->iBox = Vec_PtrSize( p->vBoxes ); + Vec_PtrPush( p->vBoxes, pBox ); + pBox->nInputs = nPis; + pBox->nOutputs = nPos; + for ( i = 0; i < nPis; i++ ) + { + assert( pPis[i] < p->nPis ); + pBox->Inouts[i] = pPis[i]; + Aig_TManSetPiArrival( p, pPis[i], pPiTimes[i] ); + p->pPis[pPis[i]].iObj2Box = pBox->iBox; + } + for ( i = 0; i < nPos; i++ ) + { + assert( pPos[i] < p->nPos ); + pBox->Inouts[nPis+i] = pPos[i]; + Aig_TManSetPoRequired( p, pPos[i], pPoTimes[i] ); + p->pPos[pPos[i]].iObj2Box = pBox->iBox; + } +} + +/**Function************************************************************* + + Synopsis [Creates the new timing box.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManSetPiDelay( Aig_TMan_t * p, int iPi, float Delay ) +{ + assert( iPi < p->nPis ); + p->pPis[iPi].timeActual = Delay; +} + +/**Function************************************************************* + + Synopsis [Creates the new timing box.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManSetPoDelay( Aig_TMan_t * p, int iPo, float Delay ) +{ + assert( iPo < p->nPos ); + p->pPos[iPo].timeActual = Delay; +} + +/**Function************************************************************* + + Synopsis [Creates the new timing box.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManSetPiArrival( Aig_TMan_t * p, int iPi, float Delay ) +{ + assert( iPi < p->nPis ); + p->pPis[iPi].timeOffset = Delay; +} + +/**Function************************************************************* + + Synopsis [Creates the new timing box.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManSetPoRequired( Aig_TMan_t * p, int iPo, float Delay ) +{ + assert( iPo < p->nPos ); + p->pPos[iPo].timeOffset = Delay; +} + +/**Function************************************************************* + + Synopsis [Increments the trav ID of the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TManIncrementTravId( Aig_TMan_t * p ) +{ + p->nTravIds++; +} + +/**Function************************************************************* + + Synopsis [Returns PI arrival time.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +float Aig_TManGetPiArrival( Aig_TMan_t * p, int iPi ) +{ + Aig_TBox_t * pBox; + Aig_TObj_t * pObj; + float DelayMax; + int i; + assert( iPi < p->nPis ); + if ( p->pPis[iPi].iObj2Box < 0 ) + return p->pPis[iPi].timeOffset; + pBox = Vec_PtrEntry( p->vBoxes, p->pPis[iPi].iObj2Box ); + // check if box timing is updated + if ( pBox->TravId == p->nTravIds ) + return p->pPis[iPi].timeOffset; + pBox->TravId = p->nTravIds; + // update box timing + DelayMax = -1.0e+20F; + for ( i = 0; i < pBox->nOutputs; i++ ) + { + pObj = p->pPos + pBox->Inouts[pBox->nInputs+i]; + DelayMax = AIG_MAX( DelayMax, pObj->timeActual + pObj->timeOffset ); + } + for ( i = 0; i < pBox->nInputs; i++ ) + { + pObj = p->pPis + pBox->Inouts[i]; + pObj->timeActual = DelayMax + pObj->timeOffset; + } + return p->pPis[iPi].timeActual; +} + +/**Function************************************************************* + + Synopsis [Returns PO required time.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +float Aig_TManGetPoRequired( Aig_TMan_t * p, int iPo ) +{ + return 0.0; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigTiming.c b/src/aig/aig/aigTiming.c new file mode 100644 index 00000000..de8fdc7c --- /dev/null +++ b/src/aig/aig/aigTiming.c @@ -0,0 +1,351 @@ +/**CFile**************************************************************** + + FileName [aigTiming.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Incremental updating of direct/reverse AIG levels.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigTiming.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns the reverse level of the node.] + + Description [The reverse level is the level of the node in reverse + topological order, starting from the COs.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Aig_ObjReverseLevel( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + assert( p->vLevelR ); + Vec_IntFillExtra( p->vLevelR, pObj->Id + 1, 0 ); + return Vec_IntEntry(p->vLevelR, pObj->Id); +} + +/**Function************************************************************* + + Synopsis [Sets the reverse level of the node.] + + Description [The reverse level is the level of the node in reverse + topological order, starting from the COs.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Aig_ObjSetReverseLevel( Aig_Man_t * p, Aig_Obj_t * pObj, int LevelR ) +{ + assert( p->vLevelR ); + Vec_IntFillExtra( p->vLevelR, pObj->Id + 1, 0 ); + Vec_IntWriteEntry( p->vLevelR, pObj->Id, LevelR ); +} + +/**Function************************************************************* + + Synopsis [Resets reverse level of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjClearReverseLevel( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_ObjSetReverseLevel( p, pObj, 0 ); +} + +/**Function************************************************************* + + Synopsis [Returns required level of the node.] + + Description [Converts the reverse levels of the node into its required + level as follows: ReqLevel(Node) = MaxLevels(Ntk) + 1 - LevelR(Node).] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjRequiredLevel( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + assert( p->vLevelR ); + return p->nLevelMax + 1 - Aig_ObjReverseLevel(p, pObj); +} + +/**Function************************************************************* + + Synopsis [Computes the reverse level of the node using its fanout levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjReverseLevelNew( Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pFanout; + int i, iFanout = -1, LevelCur, Level = 0; + Aig_ObjForEachFanout( p, pObj, pFanout, iFanout, i ) + { + LevelCur = Aig_ObjReverseLevel( p, pFanout ); + Level = AIG_MAX( Level, LevelCur ); + } + return Level + 1; +} + +/**Function************************************************************* + + Synopsis [Prepares for the computation of required levels.] + + Description [This procedure should be called before the required times + are used. It starts internal data structures, which records the level + from the COs of the network nodes in reverse topologogical order.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManStartReverseLevels( Aig_Man_t * p, int nMaxLevelIncrease ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + assert( p->pFanData != NULL ); + assert( p->vLevelR == NULL ); + // remember the maximum number of direct levels + p->nLevelMax = Aig_ManLevels(p) + nMaxLevelIncrease; + // start the reverse levels + p->vLevelR = Vec_IntAlloc( 0 ); + Vec_IntFill( p->vLevelR, Aig_ManObjNumMax(p), 0 ); + // compute levels in reverse topological order + vNodes = Aig_ManDfsReverse( p ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + assert( pObj->fMarkA == 0 ); + Aig_ObjSetReverseLevel( p, pObj, Aig_ObjReverseLevelNew(p, pObj) ); + } + Vec_PtrFree( vNodes ); +} + +/**Function************************************************************* + + Synopsis [Cleans the data structures used to compute required levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManStopReverseLevels( Aig_Man_t * p ) +{ + assert( p->vLevelR != NULL ); + Vec_IntFree( p->vLevelR ); + p->vLevelR = NULL; + p->nLevelMax = 0; + +} + +/**Function************************************************************* + + Synopsis [Incrementally updates level of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManUpdateLevel( Aig_Man_t * p, Aig_Obj_t * pObjNew ) +{ + Aig_Obj_t * pFanout, * pTemp; + int iFanout = -1, LevelOld, Lev, k, m; + assert( p->pFanData != NULL ); + assert( Aig_ObjIsNode(pObjNew) ); + // allocate level if needed + if ( p->vLevels == NULL ) + p->vLevels = Vec_VecAlloc( Aig_ManLevels(p) + 8 ); + // check if level has changed + LevelOld = Aig_ObjLevel(pObjNew); + if ( LevelOld == Aig_ObjLevelNew(pObjNew) ) + return; + // start the data structure for level update + // we cannot fail to visit a node when using this structure because the + // nodes are stored by their _old_ levels, which are assumed to be correct + Vec_VecClear( p->vLevels ); + Vec_VecPush( p->vLevels, LevelOld, pObjNew ); + pObjNew->fMarkA = 1; + // recursively update level + Vec_VecForEachEntryStart( p->vLevels, pTemp, Lev, k, LevelOld ) + { + pTemp->fMarkA = 0; + assert( Aig_ObjLevel(pTemp) == Lev ); + pTemp->Level = Aig_ObjLevelNew(pTemp); + // if the level did not change, no need to check the fanout levels + if ( Aig_ObjLevel(pTemp) == Lev ) + continue; + // schedule fanout for level update + Aig_ObjForEachFanout( p, pTemp, pFanout, iFanout, m ) + { + if ( Aig_ObjIsNode(pFanout) && !pFanout->fMarkA ) + { + assert( Aig_ObjLevel(pFanout) >= Lev ); + Vec_VecPush( p->vLevels, Aig_ObjLevel(pFanout), pFanout ); + pFanout->fMarkA = 1; + } + } + } +} + +/**Function************************************************************* + + Synopsis [Incrementally updates level of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManUpdateReverseLevel( Aig_Man_t * p, Aig_Obj_t * pObjNew ) +{ + Aig_Obj_t * pFanin, * pTemp; + int LevelOld, LevFanin, Lev, k; + assert( p->vLevelR != NULL ); + assert( Aig_ObjIsNode(pObjNew) ); + // allocate level if needed + if ( p->vLevels == NULL ) + p->vLevels = Vec_VecAlloc( Aig_ManLevels(p) + 8 ); + // check if level has changed + LevelOld = Aig_ObjReverseLevel(p, pObjNew); + if ( LevelOld == Aig_ObjReverseLevelNew(p, pObjNew) ) + return; + // start the data structure for level update + // we cannot fail to visit a node when using this structure because the + // nodes are stored by their _old_ levels, which are assumed to be correct + Vec_VecClear( p->vLevels ); + Vec_VecPush( p->vLevels, LevelOld, pObjNew ); + pObjNew->fMarkA = 1; + // recursively update level + Vec_VecForEachEntryStart( p->vLevels, pTemp, Lev, k, LevelOld ) + { + pTemp->fMarkA = 0; + LevelOld = Aig_ObjReverseLevel(p, pTemp); + assert( LevelOld == Lev ); + Aig_ObjSetReverseLevel( p, pTemp, Aig_ObjReverseLevelNew(p, pTemp) ); + // if the level did not change, to need to check the fanout levels + if ( Aig_ObjReverseLevel(p, pTemp) == Lev ) + continue; + // schedule fanins for level update + pFanin = Aig_ObjFanin0(pTemp); + if ( Aig_ObjIsNode(pFanin) && !pFanin->fMarkA ) + { + LevFanin = Aig_ObjReverseLevel( p, pFanin ); + assert( LevFanin >= Lev ); + Vec_VecPush( p->vLevels, LevFanin, pFanin ); + pFanin->fMarkA = 1; + } + pFanin = Aig_ObjFanin1(pTemp); + if ( Aig_ObjIsNode(pFanin) && !pFanin->fMarkA ) + { + LevFanin = Aig_ObjReverseLevel( p, pFanin ); + assert( LevFanin >= Lev ); + Vec_VecPush( p->vLevels, LevFanin, pFanin ); + pFanin->fMarkA = 1; + } + } +} + +/**Function************************************************************* + + Synopsis [Verifies direct level of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManVerifyLevel( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i, Counter = 0; + assert( p->pFanData ); + Aig_ManForEachNode( p, pObj, i ) + if ( Aig_ObjLevel(pObj) != Aig_ObjLevelNew(pObj) ) + { + printf( "Level of node %6d should be %4d instead of %4d.\n", + pObj->Id, Aig_ObjLevelNew(pObj), Aig_ObjLevel(pObj) ); + Counter++; + } + if ( Counter ) + printf( "Levels of %d nodes are incorrect.\n", Counter ); +} + +/**Function************************************************************* + + Synopsis [Verifies reverse level of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManVerifyReverseLevel( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i, Counter = 0; + assert( p->vLevelR ); + Aig_ManForEachNode( p, pObj, i ) + if ( Aig_ObjLevel(pObj) != Aig_ObjLevelNew(pObj) ) + { + printf( "Reverse level of node %6d should be %4d instead of %4d.\n", + pObj->Id, Aig_ObjReverseLevelNew(p, pObj), Aig_ObjReverseLevel(p, pObj) ); + Counter++; + } + if ( Counter ) + printf( "Reverse levels of %d nodes are incorrect.\n", Counter ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigTruth.c b/src/aig/aig/aigTruth.c new file mode 100644 index 00000000..a92f9e1d --- /dev/null +++ b/src/aig/aig/aigTruth.c @@ -0,0 +1,98 @@ +/**CFile**************************************************************** + + FileName [aigTruth.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Computes truth table for the cut.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigTruth.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes truth table of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Aig_ManCutTruthOne( Aig_Obj_t * pNode, unsigned * pTruth, int nWords ) +{ + unsigned * pTruth0, * pTruth1; + int i; + pTruth0 = Aig_ObjFanin0(pNode)->pData; + pTruth1 = Aig_ObjFanin1(pNode)->pData; + if ( Aig_ObjIsExor(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = pTruth0[i] ^ pTruth1[i]; + else if ( !Aig_ObjFaninC0(pNode) && !Aig_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = pTruth0[i] & pTruth1[i]; + else if ( !Aig_ObjFaninC0(pNode) && Aig_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = pTruth0[i] & ~pTruth1[i]; + else if ( Aig_ObjFaninC0(pNode) && !Aig_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ~pTruth0[i] & pTruth1[i]; + else // if ( Aig_ObjFaninC0(pNode) && Aig_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ~pTruth0[i] & ~pTruth1[i]; + return pTruth; +} + +/**Function************************************************************* + + Synopsis [Computes truth table of the cut.] + + Description [The returned pointer should be used immediately.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Aig_ManCutTruth( Aig_Obj_t * pRoot, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vNodes, Vec_Ptr_t * vTruthElem, Vec_Ptr_t * vTruthStore ) +{ + Aig_Obj_t * pObj; + int i, nWords; + assert( Vec_PtrSize(vLeaves) <= Vec_PtrSize(vTruthElem) ); + assert( Vec_PtrSize(vNodes) <= Vec_PtrSize(vTruthStore) ); + assert( Vec_PtrSize(vNodes) == 0 || pRoot == Vec_PtrEntryLast(vNodes) ); + // assign elementary truth tables + Vec_PtrForEachEntry( vLeaves, pObj, i ) + pObj->pData = Vec_PtrEntry( vTruthElem, i ); + // compute truths for other nodes + nWords = Aig_TruthWordNum( Vec_PtrSize(vLeaves) ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + pObj->pData = Aig_ManCutTruthOne( pObj, Vec_PtrEntry(vTruthStore, i), nWords ); + return pRoot->pData; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigTsim.c b/src/aig/aig/aigTsim.c new file mode 100644 index 00000000..a8a3dda8 --- /dev/null +++ b/src/aig/aig/aigTsim.c @@ -0,0 +1,436 @@ +/**CFile**************************************************************** + + FileName [aigTsim.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Ternary simulation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigTsim.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +#define TSI_MAX_ROUNDS 1000 + +#define AIG_XVS0 1 +#define AIG_XVS1 2 +#define AIG_XVSX 3 + +static inline void Aig_ObjSetXsim( Aig_Obj_t * pObj, int Value ) { pObj->nCuts = Value; } +static inline int Aig_ObjGetXsim( Aig_Obj_t * pObj ) { return pObj->nCuts; } +static inline int Aig_XsimInv( int Value ) +{ + if ( Value == AIG_XVS0 ) + return AIG_XVS1; + if ( Value == AIG_XVS1 ) + return AIG_XVS0; + assert( Value == AIG_XVSX ); + return AIG_XVSX; +} +static inline int Aig_XsimAnd( int Value0, int Value1 ) +{ + if ( Value0 == AIG_XVS0 || Value1 == AIG_XVS0 ) + return AIG_XVS0; + if ( Value0 == AIG_XVSX || Value1 == AIG_XVSX ) + return AIG_XVSX; + assert( Value0 == AIG_XVS1 && Value1 == AIG_XVS1 ); + return AIG_XVS1; +} +static inline int Aig_XsimRand2() +{ + return (rand() & 1) ? AIG_XVS1 : AIG_XVS0; +} +static inline int Aig_XsimRand3() +{ + int RetValue; + do { + RetValue = rand() & 3; + } while ( RetValue == 0 ); + return RetValue; +} +static inline int Aig_ObjGetXsimFanin0( Aig_Obj_t * pObj ) +{ + int RetValue; + RetValue = Aig_ObjGetXsim(Aig_ObjFanin0(pObj)); + return Aig_ObjFaninC0(pObj)? Aig_XsimInv(RetValue) : RetValue; +} +static inline int Aig_ObjGetXsimFanin1( Aig_Obj_t * pObj ) +{ + int RetValue; + RetValue = Aig_ObjGetXsim(Aig_ObjFanin1(pObj)); + return Aig_ObjFaninC1(pObj)? Aig_XsimInv(RetValue) : RetValue; +} +static inline void Aig_XsimPrint( FILE * pFile, int Value ) +{ + if ( Value == AIG_XVS0 ) + { + fprintf( pFile, "0" ); + return; + } + if ( Value == AIG_XVS1 ) + { + fprintf( pFile, "1" ); + return; + } + assert( Value == AIG_XVSX ); + fprintf( pFile, "x" ); +} + +// simulation manager +typedef struct Aig_Tsi_t_ Aig_Tsi_t; +struct Aig_Tsi_t_ +{ + Aig_Man_t * pAig; // the original AIG manager + // ternary state representation + int nWords; // the number of words in the states + Vec_Ptr_t * vStates; // the collection of ternary states + Aig_MmFixed_t * pMem; // memory for ternary states + // hash table for terminary states + unsigned ** pBins; + int nBins; +}; + +static inline unsigned * Aig_TsiNext( unsigned * pState, int nWords ) { return *((unsigned **)(pState + nWords)); } +static inline void Aig_TsiSetNext( unsigned * pState, int nWords, unsigned * pNext ) { *((unsigned **)(pState + nWords)) = pNext; } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates simulation manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Tsi_t * Aig_TsiStart( Aig_Man_t * pAig ) +{ + Aig_Tsi_t * p; + p = (Aig_Tsi_t *)malloc( sizeof(Aig_Tsi_t) ); + memset( p, 0, sizeof(Aig_Tsi_t) ); + p->pAig = pAig; + p->nWords = Aig_BitWordNum( 2*Aig_ManRegNum(pAig) ); + p->vStates = Vec_PtrAlloc( 1000 ); + p->pMem = Aig_MmFixedStart( sizeof(unsigned) * p->nWords + sizeof(unsigned *), 10000 ); + p->nBins = Aig_PrimeCudd(TSI_MAX_ROUNDS/2); + p->pBins = ALLOC( unsigned *, p->nBins ); + memset( p->pBins, 0, sizeof(unsigned *) * p->nBins ); + return p; +} + +/**Function************************************************************* + + Synopsis [Deallocates simulation manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TsiStop( Aig_Tsi_t * p ) +{ + Aig_MmFixedStop( p->pMem, 0 ); + Vec_PtrFree( p->vStates ); + free( p->pBins ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Computes hash value of the node using its simulation info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_TsiStateHash( unsigned * pState, int nWords, int nTableSize ) +{ + static int s_FPrimes[128] = { + 1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459, + 1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997, + 2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543, + 2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089, + 3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671, + 3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243, + 4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871, + 4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471, + 5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073, + 6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689, + 6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309, + 7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933, + 8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147 + }; + unsigned uHash; + int i; + uHash = 0; + for ( i = 0; i < nWords; i++ ) + uHash ^= pState[i] * s_FPrimes[i & 0x7F]; + return uHash % nTableSize; +} + +/**Function************************************************************* + + Synopsis [Inserts value into the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_TsiStateLookup( Aig_Tsi_t * p, unsigned * pState, int nWords ) +{ + unsigned * pEntry; + int Hash; + Hash = Aig_TsiStateHash( pState, nWords, p->nBins ); + for ( pEntry = p->pBins[Hash]; pEntry; pEntry = Aig_TsiNext(pEntry, nWords) ) + if ( !memcmp( pEntry, pState, sizeof(unsigned) * nWords ) ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Inserts value into the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TsiStateInsert( Aig_Tsi_t * p, unsigned * pState, int nWords ) +{ + int Hash = Aig_TsiStateHash( pState, nWords, p->nBins ); + assert( !Aig_TsiStateLookup( p, pState, nWords ) ); + Aig_TsiSetNext( pState, nWords, p->pBins[Hash] ); + p->pBins[Hash] = pState; +} + +/**Function************************************************************* + + Synopsis [Inserts value into the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Aig_TsiStateNew( Aig_Tsi_t * p ) +{ + unsigned * pState; + pState = (unsigned *)Aig_MmFixedEntryFetch( p->pMem ); + memset( pState, 0, sizeof(unsigned) * p->nWords ); + Vec_PtrPush( p->vStates, pState ); + return pState; +} + +/**Function************************************************************* + + Synopsis [Inserts value into the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_TsiStatePrint( Aig_Tsi_t * p, unsigned * pState ) +{ + int i, Value, nZeros = 0, nOnes = 0, nDcs = 0; + for ( i = 0; i < Aig_ManRegNum(p->pAig); i++ ) + { + Value = (Aig_InfoHasBit( pState, 2 * i + 1 ) << 1) | Aig_InfoHasBit( pState, 2 * i ); + if ( Value == 1 ) + printf( "0" ), nZeros++; + else if ( Value == 2 ) + printf( "1" ), nOnes++; + else if ( Value == 3 ) + printf( "x" ), nDcs++; + else + assert( 0 ); + } + printf( " (0=%5d, 1=%5d, x=%5d)\n", nZeros, nOnes, nDcs ); +} + + +/**Function************************************************************* + + Synopsis [Cycles the circuit to create a new initial state.] + + Description [Simulates the circuit with random input for the given + number of timeframes to get a better initial state.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManTernarySimulate( Aig_Man_t * p, int fVerbose ) +{ + Aig_Tsi_t * pTsi; + Vec_Ptr_t * vMap; + Aig_Obj_t * pObj, * pObjLi, * pObjLo; + unsigned * pState, * pPrev; + int i, k, f, fConstants, Value, nCounter; + // allocate the simulation manager + pTsi = Aig_TsiStart( p ); + // initialize the values + Aig_ObjSetXsim( Aig_ManConst1(p), AIG_XVS1 ); + Aig_ManForEachPiSeq( p, pObj, i ) + Aig_ObjSetXsim( pObj, AIG_XVSX ); + Aig_ManForEachLoSeq( p, pObj, i ) + Aig_ObjSetXsim( pObj, AIG_XVS0 ); + // simulate for the given number of timeframes + for ( f = 0; f < TSI_MAX_ROUNDS; f++ ) + { + // collect this state + pState = Aig_TsiStateNew( pTsi ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + { + Value = Aig_ObjGetXsim(pObjLo); + if ( Value & 1 ) + Aig_InfoSetBit( pState, 2 * i ); + if ( Value & 2 ) + Aig_InfoSetBit( pState, 2 * i + 1 ); + } +// Aig_TsiStatePrint( pTsi, pState ); + // check if this state exists + if ( Aig_TsiStateLookup( pTsi, pState, pTsi->nWords ) ) + break; + // insert this state + Aig_TsiStateInsert( pTsi, pState, pTsi->nWords ); + // simulate internal nodes + Aig_ManForEachNode( p, pObj, i ) + Aig_ObjSetXsim( pObj, Aig_XsimAnd(Aig_ObjGetXsimFanin0(pObj), Aig_ObjGetXsimFanin1(pObj)) ); + // transfer the latch values + Aig_ManForEachLiSeq( p, pObj, i ) + Aig_ObjSetXsim( pObj, Aig_ObjGetXsimFanin0(pObj) ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + Aig_ObjSetXsim( pObjLo, Aig_ObjGetXsim(pObjLi) ); + } + if ( f == TSI_MAX_ROUNDS ) + { + printf( "Aig_ManTernarySimulate(): Did not reach a fixed point after %d iterations (not a bug).\n", TSI_MAX_ROUNDS ); + Aig_TsiStop( pTsi ); + return NULL; + } + // OR all the states + pState = Vec_PtrEntry( pTsi->vStates, 0 ); + Vec_PtrForEachEntry( pTsi->vStates, pPrev, i ) + { + for ( k = 0; k < pTsi->nWords; k++ ) + pState[k] |= pPrev[k]; + } + // check if there are constants + fConstants = 0; + if ( 2*Aig_ManRegNum(p) == 32*pTsi->nWords ) + { + for ( i = 0; i < pTsi->nWords; i++ ) + if ( pState[i] != ~0 ) + fConstants = 1; + } + else + { + for ( i = 0; i < pTsi->nWords - 1; i++ ) + if ( pState[i] != ~0 ) + fConstants = 1; + if ( pState[i] != Aig_InfoMask( 2*Aig_ManRegNum(p) - 32*(pTsi->nWords-1) ) ) + fConstants = 1; + } + if ( fConstants == 0 ) + { + Aig_TsiStop( pTsi ); + return NULL; + } + + // start mapping by adding the true PIs + vMap = Vec_PtrAlloc( Aig_ManPiNum(p) ); + Aig_ManForEachPiSeq( p, pObj, i ) + Vec_PtrPush( vMap, pObj ); + // find constant registers + nCounter = 0; + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + { + Value = (Aig_InfoHasBit( pState, 2 * i + 1 ) << 1) | Aig_InfoHasBit( pState, 2 * i ); + nCounter += (Value == 1 || Value == 2); + if ( Value == 1 ) + Vec_PtrPush( vMap, Aig_ManConst0(p) ); + else if ( Value == 2 ) + Vec_PtrPush( vMap, Aig_ManConst1(p) ); + else if ( Value == 3 ) + Vec_PtrPush( vMap, pObjLo ); + else + assert( 0 ); +// Aig_XsimPrint( stdout, Value ); + } +// printf( "\n" ); + Aig_TsiStop( pTsi ); + if ( fVerbose ) + printf( "Detected %d constants after %d iterations of ternary simulation.\n", nCounter, f ); + return vMap; +} + +/**Function************************************************************* + + Synopsis [Reduces the circuit using ternary simulation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Aig_ManConstReduce( Aig_Man_t * p, int fVerbose ) +{ + Aig_Man_t * pTemp; + Vec_Ptr_t * vMap; + while ( (vMap = Aig_ManTernarySimulate( p, fVerbose )) ) + { + if ( fVerbose ) + printf( "RBeg = %5d. NBeg = %6d. ", Aig_ManRegNum(p), Aig_ManNodeNum(p) ); + p = Aig_ManRemap( pTemp = p, vMap ); + Aig_ManStop( pTemp ); + Vec_PtrFree( vMap ); + Aig_ManSeqCleanup( p ); + if ( fVerbose ) + printf( "REnd = %5d. NEnd = %6d. \n", Aig_ManRegNum(p), Aig_ManNodeNum(p) ); + } + return p; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigUtil.c b/src/aig/aig/aigUtil.c new file mode 100644 index 00000000..b70d11c7 --- /dev/null +++ b/src/aig/aig/aigUtil.c @@ -0,0 +1,851 @@ +/**CFile**************************************************************** + + FileName [aigUtil.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Various procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigUtil.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function******************************************************************** + + Synopsis [Returns the next prime >= p.] + + Description [Copied from CUDD, for stand-aloneness.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +unsigned int Aig_PrimeCudd( unsigned int p ) +{ + int i,pn; + + p--; + do { + p++; + if (p&1) { + pn = 1; + i = 3; + while ((unsigned) (i * i) <= p) { + if (p % i == 0) { + pn = 0; + break; + } + i += 2; + } + } else { + pn = 0; + } + } while (!pn); + return(p); + +} /* end of Cudd_Prime */ + +/**Function************************************************************* + + Synopsis [Increments the current traversal ID of the network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManIncrementTravId( Aig_Man_t * p ) +{ + if ( p->nTravIds >= (1<<30)-1 ) + Aig_ManCleanData( p ); + p->nTravIds++; +} + +/**Function************************************************************* + + Synopsis [Collect the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManLevels( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i, LevelMax = 0; + Aig_ManForEachPo( p, pObj, i ) + LevelMax = AIG_MAX( LevelMax, (int)Aig_ObjFanin0(pObj)->Level ); + return LevelMax; +} + +/**Function************************************************************* + + Synopsis [Reset reference counters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManResetRefs( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p, pObj, i ) + pObj->nRefs = 0; + Aig_ManForEachObj( p, pObj, i ) + { + if ( Aig_ObjFanin0(pObj) ) + Aig_ObjFanin0(pObj)->nRefs++; + if ( Aig_ObjFanin1(pObj) ) + Aig_ObjFanin1(pObj)->nRefs++; + } +} + +/**Function************************************************************* + + Synopsis [Cleans MarkB.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManCleanMarkA( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p, pObj, i ) + pObj->fMarkA = 0; +} + +/**Function************************************************************* + + Synopsis [Cleans MarkB.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManCleanMarkB( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p, pObj, i ) + pObj->fMarkB = 0; +} + +/**Function************************************************************* + + Synopsis [Cleans the data pointers for the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManCleanData( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p, pObj, i ) + pObj->pData = NULL; +} + +/**Function************************************************************* + + Synopsis [Recursively cleans the data pointers in the cone of the node.] + + Description [Applicable to small AIGs only because no caching is performed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjCleanData_rec( Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + assert( !Aig_ObjIsPo(pObj) ); + if ( Aig_ObjIsAnd(pObj) ) + { + Aig_ObjCleanData_rec( Aig_ObjFanin0(pObj) ); + Aig_ObjCleanData_rec( Aig_ObjFanin1(pObj) ); + } + pObj->pData = NULL; +} + + +/**Function************************************************************* + + Synopsis [Detects multi-input gate rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjCollectMulti_rec( Aig_Obj_t * pRoot, Aig_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + if ( pRoot != pObj && (Aig_IsComplement(pObj) || Aig_ObjIsPi(pObj) || Aig_ObjType(pRoot) != Aig_ObjType(pObj)) ) + { + Vec_PtrPushUnique(vSuper, pObj); + return; + } + Aig_ObjCollectMulti_rec( pRoot, Aig_ObjChild0(pObj), vSuper ); + Aig_ObjCollectMulti_rec( pRoot, Aig_ObjChild1(pObj), vSuper ); +} + +/**Function************************************************************* + + Synopsis [Detects multi-input gate rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjCollectMulti( Aig_Obj_t * pRoot, Vec_Ptr_t * vSuper ) +{ + assert( !Aig_IsComplement(pRoot) ); + Vec_PtrClear( vSuper ); + Aig_ObjCollectMulti_rec( pRoot, pRoot, vSuper ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the node is the root of MUX or EXOR/NEXOR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjIsMuxType( Aig_Obj_t * pNode ) +{ + Aig_Obj_t * pNode0, * pNode1; + // check that the node is regular + assert( !Aig_IsComplement(pNode) ); + // if the node is not AND, this is not MUX + if ( !Aig_ObjIsAnd(pNode) ) + return 0; + // if the children are not complemented, this is not MUX + if ( !Aig_ObjFaninC0(pNode) || !Aig_ObjFaninC1(pNode) ) + return 0; + // get children + pNode0 = Aig_ObjFanin0(pNode); + pNode1 = Aig_ObjFanin1(pNode); + // if the children are not ANDs, this is not MUX + if ( !Aig_ObjIsAnd(pNode0) || !Aig_ObjIsAnd(pNode1) ) + return 0; + // otherwise the node is MUX iff it has a pair of equal grandchildren + return (Aig_ObjFanin0(pNode0) == Aig_ObjFanin0(pNode1) && (Aig_ObjFaninC0(pNode0) ^ Aig_ObjFaninC0(pNode1))) || + (Aig_ObjFanin0(pNode0) == Aig_ObjFanin1(pNode1) && (Aig_ObjFaninC0(pNode0) ^ Aig_ObjFaninC1(pNode1))) || + (Aig_ObjFanin1(pNode0) == Aig_ObjFanin0(pNode1) && (Aig_ObjFaninC1(pNode0) ^ Aig_ObjFaninC0(pNode1))) || + (Aig_ObjFanin1(pNode0) == Aig_ObjFanin1(pNode1) && (Aig_ObjFaninC1(pNode0) ^ Aig_ObjFaninC1(pNode1))); +} + + +/**Function************************************************************* + + Synopsis [Recognizes what nodes are inputs of the EXOR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ObjRecognizeExor( Aig_Obj_t * pObj, Aig_Obj_t ** ppFan0, Aig_Obj_t ** ppFan1 ) +{ + Aig_Obj_t * p0, * p1; + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) ) + return 0; + if ( Aig_ObjIsExor(pObj) ) + { + *ppFan0 = Aig_ObjChild0(pObj); + *ppFan1 = Aig_ObjChild1(pObj); + return 1; + } + assert( Aig_ObjIsAnd(pObj) ); + p0 = Aig_ObjChild0(pObj); + p1 = Aig_ObjChild1(pObj); + if ( !Aig_IsComplement(p0) || !Aig_IsComplement(p1) ) + return 0; + p0 = Aig_Regular(p0); + p1 = Aig_Regular(p1); + if ( !Aig_ObjIsAnd(p0) || !Aig_ObjIsAnd(p1) ) + return 0; + if ( Aig_ObjFanin0(p0) != Aig_ObjFanin0(p1) || Aig_ObjFanin1(p0) != Aig_ObjFanin1(p1) ) + return 0; + if ( Aig_ObjFaninC0(p0) == Aig_ObjFaninC0(p1) || Aig_ObjFaninC1(p0) == Aig_ObjFaninC1(p1) ) + return 0; + *ppFan0 = Aig_ObjChild0(p0); + *ppFan1 = Aig_ObjChild1(p0); + return 1; +} + +/**Function************************************************************* + + Synopsis [Recognizes what nodes are control and data inputs of a MUX.] + + Description [If the node is a MUX, returns the control variable C. + Assigns nodes T and E to be the then and else variables of the MUX. + Node C is never complemented. Nodes T and E can be complemented. + This function also recognizes EXOR/NEXOR gates as MUXes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ObjRecognizeMux( Aig_Obj_t * pNode, Aig_Obj_t ** ppNodeT, Aig_Obj_t ** ppNodeE ) +{ + Aig_Obj_t * pNode0, * pNode1; + assert( !Aig_IsComplement(pNode) ); + assert( Aig_ObjIsMuxType(pNode) ); + // get children + pNode0 = Aig_ObjFanin0(pNode); + pNode1 = Aig_ObjFanin1(pNode); + + // find the control variable + if ( Aig_ObjFanin1(pNode0) == Aig_ObjFanin1(pNode1) && (Aig_ObjFaninC1(pNode0) ^ Aig_ObjFaninC1(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p2) ) + if ( Aig_ObjFaninC1(pNode0) ) + { // pNode2->p2 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild0(pNode1));//pNode2->p1); + *ppNodeE = Aig_Not(Aig_ObjChild0(pNode0));//pNode1->p1); + return Aig_ObjChild1(pNode1);//pNode2->p2; + } + else + { // pNode1->p2 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild0(pNode0));//pNode1->p1); + *ppNodeE = Aig_Not(Aig_ObjChild0(pNode1));//pNode2->p1); + return Aig_ObjChild1(pNode0);//pNode1->p2; + } + } + else if ( Aig_ObjFanin0(pNode0) == Aig_ObjFanin0(pNode1) && (Aig_ObjFaninC0(pNode0) ^ Aig_ObjFaninC0(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p1) ) + if ( Aig_ObjFaninC0(pNode0) ) + { // pNode2->p1 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild1(pNode1));//pNode2->p2); + *ppNodeE = Aig_Not(Aig_ObjChild1(pNode0));//pNode1->p2); + return Aig_ObjChild0(pNode1);//pNode2->p1; + } + else + { // pNode1->p1 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild1(pNode0));//pNode1->p2); + *ppNodeE = Aig_Not(Aig_ObjChild1(pNode1));//pNode2->p2); + return Aig_ObjChild0(pNode0);//pNode1->p1; + } + } + else if ( Aig_ObjFanin0(pNode0) == Aig_ObjFanin1(pNode1) && (Aig_ObjFaninC0(pNode0) ^ Aig_ObjFaninC1(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p1) ) + if ( Aig_ObjFaninC0(pNode0) ) + { // pNode2->p2 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild0(pNode1));//pNode2->p1); + *ppNodeE = Aig_Not(Aig_ObjChild1(pNode0));//pNode1->p2); + return Aig_ObjChild1(pNode1);//pNode2->p2; + } + else + { // pNode1->p1 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild1(pNode0));//pNode1->p2); + *ppNodeE = Aig_Not(Aig_ObjChild0(pNode1));//pNode2->p1); + return Aig_ObjChild0(pNode0);//pNode1->p1; + } + } + else if ( Aig_ObjFanin1(pNode0) == Aig_ObjFanin0(pNode1) && (Aig_ObjFaninC1(pNode0) ^ Aig_ObjFaninC0(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p2) ) + if ( Aig_ObjFaninC1(pNode0) ) + { // pNode2->p1 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild1(pNode1));//pNode2->p2); + *ppNodeE = Aig_Not(Aig_ObjChild0(pNode0));//pNode1->p1); + return Aig_ObjChild0(pNode1);//pNode2->p1; + } + else + { // pNode1->p2 is positive phase of C + *ppNodeT = Aig_Not(Aig_ObjChild0(pNode0));//pNode1->p1); + *ppNodeE = Aig_Not(Aig_ObjChild1(pNode1));//pNode2->p2); + return Aig_ObjChild1(pNode0);//pNode1->p2; + } + } + assert( 0 ); // this is not MUX + return NULL; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Aig_ObjReal_rec( Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pObjNew, * pObjR = Aig_Regular(pObj); + if ( !Aig_ObjIsBuf(pObjR) ) + return pObj; + pObjNew = Aig_ObjReal_rec( Aig_ObjChild0(pObjR) ); + return Aig_NotCond( pObjNew, Aig_IsComplement(pObj) ); +} + + +/**Function************************************************************* + + Synopsis [Prints Eqn formula for the AIG rooted at this node.] + + Description [The formula is in terms of PIs, which should have + their names assigned in pObj->pData fields.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjPrintEqn( FILE * pFile, Aig_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ) +{ + Vec_Ptr_t * vSuper; + Aig_Obj_t * pFanin; + int fCompl, i; + // store the complemented attribute + fCompl = Aig_IsComplement(pObj); + pObj = Aig_Regular(pObj); + // constant case + if ( Aig_ObjIsConst1(pObj) ) + { + fprintf( pFile, "%d", !fCompl ); + return; + } + // PI case + if ( Aig_ObjIsPi(pObj) ) + { + fprintf( pFile, "%s%s", fCompl? "!" : "", (char*)pObj->pData ); + return; + } + // AND case + Vec_VecExpand( vLevels, Level ); + vSuper = Vec_VecEntry(vLevels, Level); + Aig_ObjCollectMulti( pObj, vSuper ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + Aig_ObjPrintEqn( pFile, Aig_NotCond(pFanin, fCompl), vLevels, Level+1 ); + if ( i < Vec_PtrSize(vSuper) - 1 ) + fprintf( pFile, " %s ", fCompl? "+" : "*" ); + } + fprintf( pFile, "%s", (Level==0? "" : ")") ); + return; +} + +/**Function************************************************************* + + Synopsis [Prints Verilog formula for the AIG rooted at this node.] + + Description [The formula is in terms of PIs, which should have + their names assigned in pObj->pData fields.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjPrintVerilog( FILE * pFile, Aig_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ) +{ + Vec_Ptr_t * vSuper; + Aig_Obj_t * pFanin, * pFanin0, * pFanin1, * pFaninC; + int fCompl, i; + // store the complemented attribute + fCompl = Aig_IsComplement(pObj); + pObj = Aig_Regular(pObj); + // constant case + if ( Aig_ObjIsConst1(pObj) ) + { + fprintf( pFile, "1\'b%d", !fCompl ); + return; + } + // PI case + if ( Aig_ObjIsPi(pObj) ) + { + fprintf( pFile, "%s%s", fCompl? "~" : "", (char*)pObj->pData ); + return; + } + // EXOR case + if ( Aig_ObjIsExor(pObj) ) + { + Vec_VecExpand( vLevels, Level ); + vSuper = Vec_VecEntry( vLevels, Level ); + Aig_ObjCollectMulti( pObj, vSuper ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + Aig_ObjPrintVerilog( pFile, Aig_NotCond(pFanin, (fCompl && i==0)), vLevels, Level+1 ); + if ( i < Vec_PtrSize(vSuper) - 1 ) + fprintf( pFile, " ^ " ); + } + fprintf( pFile, "%s", (Level==0? "" : ")") ); + return; + } + // MUX case + if ( Aig_ObjIsMuxType(pObj) ) + { + if ( Aig_ObjRecognizeExor( pObj, &pFanin0, &pFanin1 ) ) + { + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Aig_ObjPrintVerilog( pFile, Aig_NotCond(pFanin0, fCompl), vLevels, Level+1 ); + fprintf( pFile, " ^ " ); + Aig_ObjPrintVerilog( pFile, pFanin1, vLevels, Level+1 ); + fprintf( pFile, "%s", (Level==0? "" : ")") ); + } + else + { + pFaninC = Aig_ObjRecognizeMux( pObj, &pFanin1, &pFanin0 ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Aig_ObjPrintVerilog( pFile, pFaninC, vLevels, Level+1 ); + fprintf( pFile, " ? " ); + Aig_ObjPrintVerilog( pFile, Aig_NotCond(pFanin1, fCompl), vLevels, Level+1 ); + fprintf( pFile, " : " ); + Aig_ObjPrintVerilog( pFile, Aig_NotCond(pFanin0, fCompl), vLevels, Level+1 ); + fprintf( pFile, "%s", (Level==0? "" : ")") ); + } + return; + } + // AND case + Vec_VecExpand( vLevels, Level ); + vSuper = Vec_VecEntry(vLevels, Level); + Aig_ObjCollectMulti( pObj, vSuper ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + Aig_ObjPrintVerilog( pFile, Aig_NotCond(pFanin, fCompl), vLevels, Level+1 ); + if ( i < Vec_PtrSize(vSuper) - 1 ) + fprintf( pFile, " %s ", fCompl? "|" : "&" ); + } + fprintf( pFile, "%s", (Level==0? "" : ")") ); + return; +} + + +/**Function************************************************************* + + Synopsis [Prints node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ObjPrintVerbose( Aig_Obj_t * pObj, int fHaig ) +{ + assert( !Aig_IsComplement(pObj) ); + printf( "Node %p : ", pObj ); + if ( Aig_ObjIsConst1(pObj) ) + printf( "constant 1" ); + else if ( Aig_ObjIsPi(pObj) ) + printf( "PI" ); + else + printf( "AND( %p%s, %p%s )", + Aig_ObjFanin0(pObj), (Aig_ObjFaninC0(pObj)? "\'" : " "), + Aig_ObjFanin1(pObj), (Aig_ObjFaninC1(pObj)? "\'" : " ") ); + printf( " (refs = %3d)", Aig_ObjRefs(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Prints node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManPrintVerbose( Aig_Man_t * p, int fHaig ) +{ + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj; + int i; + printf( "PIs: " ); + Aig_ManForEachPi( p, pObj, i ) + printf( " %p", pObj ); + printf( "\n" ); + vNodes = Aig_ManDfs( p ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + Aig_ObjPrintVerbose( pObj, fHaig ), printf( "\n" ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Write speculative miter for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDump( Aig_Man_t * p ) +{ + static int Counter = 0; + char FileName[20]; + // dump the logic into a file + sprintf( FileName, "aigbug\\%03d.blif", ++Counter ); + Aig_ManDumpBlif( p, FileName ); + printf( "Intermediate AIG with %d nodes was written into file \"%s\".\n", Aig_ManNodeNum(p), FileName ); +} + +/**Function************************************************************* + + Synopsis [Writes the AIG into the BLIF file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDumpBlif( Aig_Man_t * p, char * pFileName ) +{ + FILE * pFile; + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj, * pObjLi, * pObjLo, * pConst1 = NULL; + int i, nDigits, Counter = 0; + if ( Aig_ManPoNum(p) == 0 ) + { + printf( "Aig_ManDumpBlif(): AIG manager does not have POs.\n" ); + return; + } + // collect nodes in the DFS order + vNodes = Aig_ManDfs( p ); + // assign IDs to objects + Aig_ManConst1(p)->iData = Counter++; + Aig_ManForEachPi( p, pObj, i ) + pObj->iData = Counter++; + Aig_ManForEachPo( p, pObj, i ) + pObj->iData = Counter++; + Vec_PtrForEachEntry( vNodes, pObj, i ) + pObj->iData = Counter++; + nDigits = Aig_Base10Log( Counter ); + // write the file + pFile = fopen( pFileName, "w" ); + fprintf( pFile, "# BLIF file written by procedure Aig_ManDumpBlif()\n" ); +// fprintf( pFile, "# http://www.eecs.berkeley.edu/~alanmi/abc/\n" ); + fprintf( pFile, ".model test\n" ); + // write PIs + fprintf( pFile, ".inputs" ); + Aig_ManForEachPiSeq( p, pObj, i ) + fprintf( pFile, " n%0*d", nDigits, pObj->iData ); + fprintf( pFile, "\n" ); + // write POs + fprintf( pFile, ".outputs" ); + Aig_ManForEachPoSeq( p, pObj, i ) + fprintf( pFile, " n%0*d", nDigits, pObj->iData ); + fprintf( pFile, "\n" ); + // write latches + if ( Aig_ManRegNum(p) ) + { + fprintf( pFile, "\n" ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + fprintf( pFile, ".latch n%0*d n%0*d 0\n", nDigits, pObjLi->iData, nDigits, pObjLo->iData ); + fprintf( pFile, "\n" ); + } + // write nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + fprintf( pFile, ".names n%0*d n%0*d n%0*d\n", + nDigits, Aig_ObjFanin0(pObj)->iData, + nDigits, Aig_ObjFanin1(pObj)->iData, + nDigits, pObj->iData ); + fprintf( pFile, "%d%d 1\n", !Aig_ObjFaninC0(pObj), !Aig_ObjFaninC1(pObj) ); + } + // write POs + Aig_ManForEachPo( p, pObj, i ) + { + fprintf( pFile, ".names n%0*d n%0*d\n", + nDigits, Aig_ObjFanin0(pObj)->iData, + nDigits, pObj->iData ); + fprintf( pFile, "%d 1\n", !Aig_ObjFaninC0(pObj) ); + if ( Aig_ObjIsConst1(Aig_ObjFanin0(pObj)) ) + pConst1 = Aig_ManConst1(p); + } + if ( pConst1 ) + fprintf( pFile, ".names n%0*d\n 1\n", nDigits, pConst1->iData ); + fprintf( pFile, ".end\n\n" ); + fclose( pFile ); + Vec_PtrFree( vNodes ); +} + +/**Function************************************************************* + + Synopsis [Writes the AIG into the BLIF file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManDumpVerilog( Aig_Man_t * p, char * pFileName ) +{ + FILE * pFile; + Vec_Ptr_t * vNodes; + Aig_Obj_t * pObj, * pObjLi, * pObjLo, * pConst1 = NULL; + int i, nDigits, Counter = 0; + if ( Aig_ManPoNum(p) == 0 ) + { + printf( "Aig_ManDumpBlif(): AIG manager does not have POs.\n" ); + return; + } + // collect nodes in the DFS order + vNodes = Aig_ManDfs( p ); + // assign IDs to objects + Aig_ManConst1(p)->iData = Counter++; + Aig_ManForEachPi( p, pObj, i ) + pObj->iData = Counter++; + Aig_ManForEachPo( p, pObj, i ) + pObj->iData = Counter++; + Vec_PtrForEachEntry( vNodes, pObj, i ) + pObj->iData = Counter++; + nDigits = Aig_Base10Log( Counter ); + // write the file + pFile = fopen( pFileName, "w" ); + fprintf( pFile, "// Verilog file written by procedure Aig_ManDumpVerilog()\n" ); +// fprintf( pFile, "// http://www.eecs.berkeley.edu/~alanmi/abc/\n" ); + if ( Aig_ManRegNum(p) ) + fprintf( pFile, "module %s ( clock", p->pName? p->pName: "test" ); + else + fprintf( pFile, "module %s (", p->pName? p->pName: "test" ); + Aig_ManForEachPiSeq( p, pObj, i ) + fprintf( pFile, "%s n%0*d", ((Aig_ManRegNum(p) || i)? ",":""), nDigits, pObj->iData ); + Aig_ManForEachPoSeq( p, pObj, i ) + fprintf( pFile, ", n%0*d", nDigits, pObj->iData ); + fprintf( pFile, " );\n" ); + + // write PIs + if ( Aig_ManRegNum(p) ) + fprintf( pFile, "input clock;\n" ); + Aig_ManForEachPiSeq( p, pObj, i ) + fprintf( pFile, "input n%0*d;\n", nDigits, pObj->iData ); + // write POs + Aig_ManForEachPoSeq( p, pObj, i ) + fprintf( pFile, "output n%0*d;\n", nDigits, pObj->iData ); + // write latches + if ( Aig_ManRegNum(p) ) + { + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + fprintf( pFile, "reg n%0*d;\n", nDigits, pObjLo->iData ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + fprintf( pFile, "wire n%0*d;\n", nDigits, pObjLi->iData ); + } + // write nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + fprintf( pFile, "wire n%0*d;\n", nDigits, pObj->iData ); + // write nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + fprintf( pFile, "assign n%0*d = %sn%0*d & %sn%0*d;\n", + nDigits, pObj->iData, + !Aig_ObjFaninC0(pObj) ? " " : "~", nDigits, Aig_ObjFanin0(pObj)->iData, + !Aig_ObjFaninC1(pObj) ? " " : "~", nDigits, Aig_ObjFanin1(pObj)->iData + ); + } + // write POs + Aig_ManForEachPoSeq( p, pObj, i ) + { + fprintf( pFile, "assign n%0*d = %sn%0*d;\n", + nDigits, pObj->iData, + !Aig_ObjFaninC0(pObj) ? " " : "~", nDigits, Aig_ObjFanin0(pObj)->iData ); + if ( Aig_ObjIsConst1(Aig_ObjFanin0(pObj)) ) + pConst1 = Aig_ManConst1(p); + } + if ( Aig_ManRegNum(p) ) + { + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + { + fprintf( pFile, "assign n%0*d = %sn%0*d;\n", + nDigits, pObjLi->iData, + !Aig_ObjFaninC0(pObjLi) ? " " : "~", nDigits, Aig_ObjFanin0(pObjLi)->iData ); + if ( Aig_ObjIsConst1(Aig_ObjFanin0(pObjLi)) ) + pConst1 = Aig_ManConst1(p); + } + } + if ( pConst1 ) + fprintf( pFile, "assign n%0*d = 1\'b1;\n", nDigits, pConst1->iData ); + + // write initial state + if ( Aig_ManRegNum(p) ) + { + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + fprintf( pFile, "always @ (posedge clock) begin n%0*d <= n%0*d; end\n", + nDigits, pObjLo->iData, + nDigits, pObjLi->iData ); + Aig_ManForEachLiLoSeq( p, pObjLi, pObjLo, i ) + fprintf( pFile, "initial begin n%0*d <= 1\'b0; end\n", + nDigits, pObjLo->iData ); + } + + fprintf( pFile, "endmodule\n\n" ); + fclose( pFile ); + Vec_PtrFree( vNodes ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aigWin.c b/src/aig/aig/aigWin.c new file mode 100644 index 00000000..0485b243 --- /dev/null +++ b/src/aig/aig/aigWin.c @@ -0,0 +1,184 @@ +/**CFile**************************************************************** + + FileName [aigWin.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [Window computation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aigWin.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Evaluate the cost of removing the node from the set of leaves.] + + Description [Returns the number of new leaves that will be brought in. + Returns large number if the node cannot be removed from the set of leaves.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Aig_NodeGetLeafCostOne( Aig_Obj_t * pNode, int nFanoutLimit ) +{ + int Cost; + // make sure the node is in the construction zone + assert( pNode->fMarkA ); + // cannot expand over the PI node + if ( Aig_ObjIsPi(pNode) ) + return 999; + // get the cost of the cone + Cost = (!Aig_ObjFanin0(pNode)->fMarkA) + (!Aig_ObjFanin1(pNode)->fMarkA); + // always accept if the number of leaves does not increase + if ( Cost < 2 ) + return Cost; + // skip nodes with many fanouts + if ( (int)pNode->nRefs > nFanoutLimit ) + return 999; + // return the number of nodes that will be on the leaves if this node is removed + return Cost; +} + +/**Function************************************************************* + + Synopsis [Builds reconvergence-driven cut by changing one leaf at a time.] + + Description [This procedure looks at the current leaves and tries to change + one leaf at a time in such a way that the cut grows as little as possible. + In evaluating the fanins, this procedure looks only at their immediate + predecessors (this is why it is called a one-level construction procedure).] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManFindCut_int( Vec_Ptr_t * vFront, Vec_Ptr_t * vVisited, int nSizeLimit, int nFanoutLimit ) +{ + Aig_Obj_t * pNode, * pFaninBest, * pNext; + int CostBest, CostCur, i; + // find the best fanin + CostBest = 100; + pFaninBest = NULL; +//printf( "Evaluating fanins of the cut:\n" ); + Vec_PtrForEachEntry( vFront, pNode, i ) + { + CostCur = Aig_NodeGetLeafCostOne( pNode, nFanoutLimit ); +//printf( " Fanin %s has cost %d.\n", Aig_ObjName(pNode), CostCur ); + if ( CostBest > CostCur || + (CostBest == CostCur && pNode->Level > pFaninBest->Level) ) + { + CostBest = CostCur; + pFaninBest = pNode; + } + if ( CostBest == 0 ) + break; + } + if ( pFaninBest == NULL ) + return 0; + assert( CostBest < 3 ); + if ( Vec_PtrSize(vFront) - 1 + CostBest > nSizeLimit ) + return 0; + assert( Aig_ObjIsNode(pFaninBest) ); + // remove the node from the array + Vec_PtrRemove( vFront, pFaninBest ); +//printf( "Removing fanin %s.\n", Aig_ObjName(pFaninBest) ); + + // add the left child to the fanins + pNext = Aig_ObjFanin0(pFaninBest); + if ( !pNext->fMarkA ) + { +//printf( "Adding fanin %s.\n", Aig_ObjName(pNext) ); + pNext->fMarkA = 1; + Vec_PtrPush( vFront, pNext ); + Vec_PtrPush( vVisited, pNext ); + } + // add the right child to the fanins + pNext = Aig_ObjFanin1(pFaninBest); + if ( !pNext->fMarkA ) + { +//printf( "Adding fanin %s.\n", Aig_ObjName(pNext) ); + pNext->fMarkA = 1; + Vec_PtrPush( vFront, pNext ); + Vec_PtrPush( vVisited, pNext ); + } + assert( Vec_PtrSize(vFront) <= nSizeLimit ); + // keep doing this + return 1; +} + +/**Function************************************************************* + + Synopsis [Computes one sequential cut of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_ManFindCut( Aig_Obj_t * pRoot, Vec_Ptr_t * vFront, Vec_Ptr_t * vVisited, int nSizeLimit, int nFanoutLimit ) +{ + Aig_Obj_t * pNode; + int i; + + assert( !Aig_IsComplement(pRoot) ); + assert( Aig_ObjIsNode(pRoot) ); + assert( Aig_ObjChild0(pRoot) ); + assert( Aig_ObjChild1(pRoot) ); + + // start the cut + Vec_PtrClear( vFront ); + Vec_PtrPush( vFront, Aig_ObjFanin0(pRoot) ); + Vec_PtrPush( vFront, Aig_ObjFanin1(pRoot) ); + + // start the visited nodes + Vec_PtrClear( vVisited ); + Vec_PtrPush( vVisited, pRoot ); + Vec_PtrPush( vVisited, Aig_ObjFanin0(pRoot) ); + Vec_PtrPush( vVisited, Aig_ObjFanin1(pRoot) ); + + // mark these nodes + assert( !pRoot->fMarkA ); + assert( !Aig_ObjFanin0(pRoot)->fMarkA ); + assert( !Aig_ObjFanin1(pRoot)->fMarkA ); + pRoot->fMarkA = 1; + Aig_ObjFanin0(pRoot)->fMarkA = 1; + Aig_ObjFanin1(pRoot)->fMarkA = 1; + + // compute the cut + while ( Aig_ManFindCut_int( vFront, vVisited, nSizeLimit, nFanoutLimit ) ); + assert( Vec_PtrSize(vFront) <= nSizeLimit ); + + // clean the visit markings + Vec_PtrForEachEntry( vVisited, pNode, i ) + pNode->fMarkA = 0; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/aig_.c b/src/aig/aig/aig_.c new file mode 100644 index 00000000..b2313d35 --- /dev/null +++ b/src/aig/aig/aig_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [aig_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: aig_.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/aig/module.make b/src/aig/aig/module.make new file mode 100644 index 00000000..c35e7121 --- /dev/null +++ b/src/aig/aig/module.make @@ -0,0 +1,21 @@ +SRC += src/aig/aig/aigCheck.c \ + src/aig/aig/aigDfs.c \ + src/aig/aig/aigFanout.c \ + src/aig/aig/aigMan.c \ + src/aig/aig/aigMem.c \ + src/aig/aig/aigMffc.c \ + src/aig/aig/aigObj.c \ + src/aig/aig/aigOper.c \ + src/aig/aig/aigOrder.c \ + src/aig/aig/aigPart.c \ + src/aig/aig/aigRepr.c \ + src/aig/aig/aigRet.c \ + src/aig/aig/aigScl.c \ + src/aig/aig/aigSeq.c \ + src/aig/aig/aigTable.c \ + src/aig/aig/aigTime.c \ + src/aig/aig/aigTiming.c \ + src/aig/aig/aigTruth.c \ + src/aig/aig/aigTsim.c \ + src/aig/aig/aigUtil.c \ + src/aig/aig/aigWin.c
\ No newline at end of file diff --git a/src/aig/bar/bar.c b/src/aig/bar/bar.c new file mode 100644 index 00000000..8c215b48 --- /dev/null +++ b/src/aig/bar/bar.c @@ -0,0 +1,177 @@ +/**CFile**************************************************************** + + FileName [bar.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [extra] + + Synopsis [Progress bar.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: bar.c,v 1.0 2003/02/01 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "bar.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +struct Bar_Progress_t_ +{ + int nItemsNext; // the number of items for the next update of the progress bar + int nItemsTotal; // the total number of items + int posTotal; // the total number of positions + int posCur; // the current position + FILE * pFile; // the output stream +}; + +static void Bar_ProgressShow( Bar_Progress_t * p, char * pString ); +static void Bar_ProgressClean( Bar_Progress_t * p ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the progress bar.] + + Description [The first parameter is the output stream (pFile), where + the progress is printed. The current printing position should be the + first one on the given line. The second parameters is the total + number of items that correspond to 100% position of the progress bar.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Bar_Progress_t * Bar_ProgressStart( FILE * pFile, int nItemsTotal ) +{ + Bar_Progress_t * p; +// extern int Abc_FrameShowProgress( void * p ); +// extern void * Abc_FrameGetGlobalFrame(); +// if ( !Abc_FrameShowProgress(Abc_FrameGetGlobalFrame()) ) return NULL; + p = (Bar_Progress_t *) malloc(sizeof(Bar_Progress_t)); + memset( p, 0, sizeof(Bar_Progress_t) ); + p->pFile = pFile; + p->nItemsTotal = nItemsTotal; + p->posTotal = 78; + p->posCur = 1; + p->nItemsNext = (int)((7.0+p->posCur)*p->nItemsTotal/p->posTotal); + Bar_ProgressShow( p, NULL ); + return p; +} + +/**Function************************************************************* + + Synopsis [Updates the progress bar.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bar_ProgressUpdate_int( Bar_Progress_t * p, int nItemsCur, char * pString ) +{ + if ( p == NULL ) return; + if ( nItemsCur < p->nItemsNext ) + return; + if ( nItemsCur >= p->nItemsTotal ) + { + p->posCur = 78; + p->nItemsNext = 0x7FFFFFFF; + } + else + { + p->posCur += 7; + p->nItemsNext = (int)((7.0+p->posCur)*p->nItemsTotal/p->posTotal); + } + Bar_ProgressShow( p, pString ); +} + + +/**Function************************************************************* + + Synopsis [Stops the progress bar.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bar_ProgressStop( Bar_Progress_t * p ) +{ + if ( p == NULL ) return; + Bar_ProgressClean( p ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Prints the progress bar of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bar_ProgressShow( Bar_Progress_t * p, char * pString ) +{ + int i; + if ( p == NULL ) return; + if ( pString ) + fprintf( p->pFile, "%s ", pString ); + for ( i = (pString? strlen(pString) + 1 : 0); i < p->posCur; i++ ) + fprintf( p->pFile, "-" ); + if ( i == p->posCur ) + fprintf( p->pFile, ">" ); + for ( i++ ; i <= p->posTotal; i++ ) + fprintf( p->pFile, " " ); + fprintf( p->pFile, "\r" ); + fflush( stdout ); +} + +/**Function************************************************************* + + Synopsis [Cleans the progress bar before quitting.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bar_ProgressClean( Bar_Progress_t * p ) +{ + int i; + if ( p == NULL ) return; + for ( i = 0; i <= p->posTotal; i++ ) + fprintf( p->pFile, " " ); + fprintf( p->pFile, "\r" ); + fflush( stdout ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/bar/bar.h b/src/aig/bar/bar.h new file mode 100644 index 00000000..814fbe6f --- /dev/null +++ b/src/aig/bar/bar.h @@ -0,0 +1,74 @@ +/**CFile**************************************************************** + + FileName [bar.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Progress bar.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: bar.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __BAR_H__ +#define __BAR_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef _WIN32 +#define inline __inline // compatible with MS VS 6.0 +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +#define BAR_PROGRESS_USE 1 + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Bar_Progress_t_ Bar_Progress_t; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== bar.c ==========================================================*/ +extern Bar_Progress_t * Bar_ProgressStart( FILE * pFile, int nItemsTotal ); +extern void Bar_ProgressStop( Bar_Progress_t * p ); +extern void Bar_ProgressUpdate_int( Bar_Progress_t * p, int nItemsCur, char * pString ); + +static inline void Bar_ProgressUpdate( Bar_Progress_t * p, int nItemsCur, char * pString ) { + if ( BAR_PROGRESS_USE && p && (nItemsCur < *((int*)p)) ) return; Bar_ProgressUpdate_int(p, nItemsCur, pString); } + + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/bar/module.make b/src/aig/bar/module.make new file mode 100644 index 00000000..26161ba1 --- /dev/null +++ b/src/aig/bar/module.make @@ -0,0 +1 @@ +SRC += src/aig/bar/bar.c diff --git a/src/aig/bdc/bdc.h b/src/aig/bdc/bdc.h new file mode 100644 index 00000000..71875edb --- /dev/null +++ b/src/aig/bdc/bdc.h @@ -0,0 +1,73 @@ +/**CFile**************************************************************** + + FileName [bdc.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Truth-table-based bi-decomposition engine.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - January 30, 2007.] + + Revision [$Id: bdc.h,v 1.00 2007/01/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __BDC_H__ +#define __BDC_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Bdc_Man_t_ Bdc_Man_t; +typedef struct Bdc_Par_t_ Bdc_Par_t; +struct Bdc_Par_t_ +{ + // general parameters + int nVarsMax; // the maximum support + int fVerbose; // enable basic stats + int fVeryVerbose; // enable detailed stats +}; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== bdcCore.c ==========================================================*/ +extern Bdc_Man_t * Bdc_ManAlloc( Bdc_Par_t * pPars ); +extern void Bdc_ManFree( Bdc_Man_t * p ); +extern int Bdc_ManDecompose( Bdc_Man_t * p, unsigned * puFunc, unsigned * puCare, int nVars, Vec_Ptr_t * vDivs, int nNodesLimit ); + + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/bdc/bdcCore.c b/src/aig/bdc/bdcCore.c new file mode 100644 index 00000000..157927b1 --- /dev/null +++ b/src/aig/bdc/bdcCore.c @@ -0,0 +1,189 @@ +/**CFile**************************************************************** + + FileName [bdcCore.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Truth-table-based bi-decomposition engine.] + + Synopsis [The gateway to bi-decomposition.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - January 30, 2007.] + + Revision [$Id: bdcCore.c,v 1.00 2007/01/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "bdcInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocate resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Bdc_Man_t * Bdc_ManAlloc( Bdc_Par_t * pPars ) +{ + Bdc_Man_t * p; + unsigned * pData; + int i, k, nBits; + p = ALLOC( Bdc_Man_t, 1 ); + memset( p, 0, sizeof(Bdc_Man_t) ); + assert( pPars->nVarsMax > 3 && pPars->nVarsMax < 16 ); + p->pPars = pPars; + p->nWords = Kit_TruthWordNum( pPars->nVarsMax ); + p->nDivsLimit = 200; + p->nNodesLimit = 0; // will be set later + // memory + p->vMemory = Vec_IntStart( 1 << 16 ); + // internal nodes + p->nNodesAlloc = 512; + p->pNodes = ALLOC( Bdc_Fun_t, p->nNodesAlloc ); + // set up hash table + p->nTableSize = (1 << p->pPars->nVarsMax); + p->pTable = ALLOC( Bdc_Fun_t *, p->nTableSize ); + memset( p->pTable, 0, sizeof(Bdc_Fun_t *) * p->nTableSize ); + p->vSpots = Vec_IntAlloc( 256 ); + // truth tables + p->vTruths = Vec_PtrAllocSimInfo( pPars->nVarsMax + 5, p->nWords ); + // set elementary truth tables + nBits = (1 << pPars->nVarsMax); + Kit_TruthFill( Vec_PtrEntry(p->vTruths, 0), p->nVars ); + for ( k = 0; k < pPars->nVarsMax; k++ ) + { + pData = Vec_PtrEntry( p->vTruths, k+1 ); + Kit_TruthClear( pData, p->nVars ); + for ( i = 0; i < nBits; i++ ) + if ( i & (1 << k) ) + pData[i>>5] |= (1 << (i&31)); + } + p->puTemp1 = Vec_PtrEntry( p->vTruths, pPars->nVarsMax + 1 ); + p->puTemp2 = Vec_PtrEntry( p->vTruths, pPars->nVarsMax + 2 ); + p->puTemp3 = Vec_PtrEntry( p->vTruths, pPars->nVarsMax + 3 ); + p->puTemp4 = Vec_PtrEntry( p->vTruths, pPars->nVarsMax + 4 ); + // start the internal ISFs + p->pIsfOL = &p->IsfOL; Bdc_IsfStart( p, p->pIsfOL ); + p->pIsfOR = &p->IsfOR; Bdc_IsfStart( p, p->pIsfOR ); + p->pIsfAL = &p->IsfAL; Bdc_IsfStart( p, p->pIsfAL ); + p->pIsfAR = &p->IsfAR; Bdc_IsfStart( p, p->pIsfAR ); + return p; +} + +/**Function************************************************************* + + Synopsis [Deallocate resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bdc_ManFree( Bdc_Man_t * p ) +{ + Vec_IntFree( p->vMemory ); + Vec_IntFree( p->vSpots ); + Vec_PtrFree( p->vTruths ); + free( p->pNodes ); + free( p->pTable ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Clears the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bdc_ManPrepare( Bdc_Man_t * p, Vec_Ptr_t * vDivs ) +{ + unsigned * puTruth; + Bdc_Fun_t * pNode; + int i; + Bdc_TableClear( p ); + Vec_IntClear( p->vMemory ); + // add constant 1 and elementary vars + p->nNodes = p->nNodesNew = 0; + for ( i = 0; i <= p->pPars->nVarsMax; i++ ) + { + pNode = Bdc_FunNew( p ); + pNode->Type = BDC_TYPE_PI; + pNode->puFunc = Vec_PtrEntry( p->vTruths, i ); + pNode->uSupp = i? (1 << (i-1)) : 0; + Bdc_TableAdd( p, pNode ); + } + // add the divisors + Vec_PtrForEachEntry( vDivs, puTruth, i ) + { + pNode = Bdc_FunNew( p ); + pNode->Type = BDC_TYPE_PI; + pNode->puFunc = puTruth; + pNode->uSupp = Kit_TruthSupport( puTruth, p->nVars ); + Bdc_TableAdd( p, pNode ); + if ( i == p->nDivsLimit ) + break; + } +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of one function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Bdc_ManDecompose( Bdc_Man_t * p, unsigned * puFunc, unsigned * puCare, int nVars, Vec_Ptr_t * vDivs, int nNodesMax ) +{ + Bdc_Isf_t Isf, * pIsf = &Isf; + // set current manager parameters + p->nVars = nVars; + p->nWords = Kit_TruthWordNum( nVars ); + Bdc_ManPrepare( p, vDivs ); + p->nNodesLimit = (p->nNodes + nNodesMax < p->nNodesAlloc)? p->nNodes + nNodesMax : p->nNodesAlloc; + // copy the function + Bdc_IsfStart( p, pIsf ); + Bdc_IsfClean( pIsf ); + pIsf->uSupp = Kit_TruthSupport( puFunc, p->nVars ) | Kit_TruthSupport( puCare, p->nVars ); + Kit_TruthAnd( pIsf->puOn, puCare, puFunc, p->nVars ); + Kit_TruthSharp( pIsf->puOff, puCare, puFunc, p->nVars ); + // call decomposition + Bdc_SuppMinimize( p, pIsf ); + p->pRoot = Bdc_ManDecompose_rec( p, pIsf ); + if ( p->pRoot == NULL ) + return -1; + return p->nNodesNew; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/bdc/bdcDec.c b/src/aig/bdc/bdcDec.c new file mode 100644 index 00000000..747fcb14 --- /dev/null +++ b/src/aig/bdc/bdcDec.c @@ -0,0 +1,461 @@ +/**CFile**************************************************************** + + FileName [bdcDec.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Truth-table-based bi-decomposition engine.] + + Synopsis [Decomposition procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - January 30, 2007.] + + Revision [$Id: bdcDec.c,v 1.00 2007/01/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "bdcInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Bdc_Type_t Bdc_DecomposeStep( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR ); +static int Bdc_DecomposeUpdateRight( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR, unsigned * puTruth, Bdc_Type_t Type ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs one step of bi-decomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Bdc_Fun_t * Bdc_ManDecompose_rec( Bdc_Man_t * p, Bdc_Isf_t * pIsf ) +{ + Bdc_Fun_t * pFunc; + Bdc_Isf_t IsfL, * pIsfL = &IsfL; + Bdc_Isf_t IsfB, * pIsfR = &IsfB; + // check computed results + if ( pFunc = Bdc_TableLookup( p, pIsf ) ) + return pFunc; + // decide on the decomposition type + pFunc = Bdc_FunNew( p ); + if ( pFunc == NULL ) + return NULL; + pFunc->Type = Bdc_DecomposeStep( p, pIsf, pIsfL, pIsfR ); + // decompose the left branch + pFunc->pFan0 = Bdc_ManDecompose_rec( p, pIsfL ); + if ( pFunc->pFan0 == NULL ) + return NULL; + // decompose the right branch + if ( Bdc_DecomposeUpdateRight( p, pIsf, pIsfL, pIsfR, pFunc->pFan0->puFunc, pFunc->Type ) ) + { + p->nNodes--; + return pFunc->pFan0; + } + pFunc->pFan1 = Bdc_ManDecompose_rec( p, pIsfL ); + if ( pFunc->pFan1 == NULL ) + return NULL; + // compute the function of node + pFunc->puFunc = (unsigned *)Vec_IntFetch(p->vMemory, p->nWords); + if ( pFunc->Type == BDC_TYPE_AND ) + Kit_TruthAnd( pFunc->puFunc, pFunc->pFan0->puFunc, pFunc->pFan1->puFunc, p->nVars ); + else if ( pFunc->Type == BDC_TYPE_OR ) + Kit_TruthOr( pFunc->puFunc, pFunc->pFan0->puFunc, pFunc->pFan1->puFunc, p->nVars ); + else + assert( 0 ); + // verify correctness + assert( Bdc_TableCheckContainment(p, pIsf, pFunc->puFunc) ); + // convert from OR to AND + if ( pFunc->Type == BDC_TYPE_OR ) + { + pFunc->Type = BDC_TYPE_AND; + pFunc->pFan0 = Bdc_Not(pFunc->pFan0); + pFunc->pFan1 = Bdc_Not(pFunc->pFan1); + Kit_TruthNot( pFunc->puFunc, pFunc->puFunc, p->nVars ); + pFunc = Bdc_Not(pFunc); + } + Bdc_TableAdd( p, Bdc_Regular(pFunc) ); + return pFunc; +} + +/**Function************************************************************* + + Synopsis [Updates the ISF of the right after the left was decompoosed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Bdc_DecomposeUpdateRight( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR, unsigned * puTruth, Bdc_Type_t Type ) +{ + if ( Type == BDC_TYPE_OR ) + { +// Right.Q = bdd_appex( Q, CompSpecLeftF, bddop_diff, setRightRes ); +// Right.R = bdd_exist( R, setRightRes ); + +// if ( pR->Q ) Cudd_RecursiveDeref( dd, pR->Q ); +// if ( pR->R ) Cudd_RecursiveDeref( dd, pR->R ); +// pR->Q = Cudd_bddAndAbstract( dd, pF->Q, Cudd_Not(CompSpecF), pL->V ); Cudd_Ref( pR->Q ); +// pR->R = Cudd_bddExistAbstract( dd, pF->R, pL->V ); Cudd_Ref( pR->R ); + +// assert( pR->R != b0 ); +// return (int)( pR->Q == b0 ); + + Kit_TruthSharp( pIsfR->puOn, pIsf->puOn, puTruth, p->nVars ); + Kit_TruthExistSet( pIsfR->puOn, pIsfR->puOn, p->nVars, pIsfL->uSupp ); + Kit_TruthExistSet( pIsfR->puOff, pIsf->puOff, p->nVars, pIsfL->uSupp ); + assert( !Kit_TruthIsConst0(pIsfR->puOff, p->nVars) ); + return Kit_TruthIsConst0(pIsfR->puOn, p->nVars); + } + else if ( Type == BDC_TYPE_AND ) + { +// Right.R = bdd_appex( R, CompSpecLeftF, bddop_and, setRightRes ); +// Right.Q = bdd_exist( Q, setRightRes ); + +// if ( pR->Q ) Cudd_RecursiveDeref( dd, pR->Q ); +// if ( pR->R ) Cudd_RecursiveDeref( dd, pR->R ); +// pR->R = Cudd_bddAndAbstract( dd, pF->R, CompSpecF, pL->V ); Cudd_Ref( pR->R ); +// pR->Q = Cudd_bddExistAbstract( dd, pF->Q, pL->V ); Cudd_Ref( pR->Q ); + +// assert( pR->Q != b0 ); +// return (int)( pR->R == b0 ); + + Kit_TruthSharp( pIsfR->puOn, pIsf->puOn, puTruth, p->nVars ); + Kit_TruthExistSet( pIsfR->puOn, pIsfR->puOn, p->nVars, pIsfL->uSupp ); + Kit_TruthExistSet( pIsfR->puOff, pIsf->puOff, p->nVars, pIsfL->uSupp ); + assert( !Kit_TruthIsConst0(pIsfR->puOff, p->nVars) ); + return Kit_TruthIsConst0(pIsfR->puOn, p->nVars); + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Checks existence of OR-bidecomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Bdc_DecomposeGetCost( Bdc_Man_t * p, int nLeftVars, int nRightVars ) +{ + assert( nLeftVars > 0 ); + assert( nRightVars > 0 ); + // compute the decomposition coefficient + if ( nLeftVars >= nRightVars ) + return BDC_SCALE * (p->nVars * nRightVars + nLeftVars); + else // if ( nLeftVars < nRightVars ) + return BDC_SCALE * (p->nVars * nLeftVars + nRightVars); +} + +/**Function************************************************************* + + Synopsis [Checks existence of weak OR-bidecomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Bdc_DecomposeFindInitialVarSet( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR ) +{ + char pVars[16]; + int v, nVars, Beg, End; + + assert( pIsfL->uSupp == 0 ); + assert( pIsfR->uSupp == 0 ); + + // fill in the variables + nVars = 0; + for ( v = 0; v < p->nVars; v++ ) + if ( pIsf->uSupp & (1 << v) ) + pVars[nVars++] = v; + + // try variable pairs + for ( Beg = 0; Beg < nVars; Beg++ ) + { + Kit_TruthExistNew( p->puTemp1, pIsf->puOff, p->nVars, pVars[Beg] ); + for ( End = nVars - 1; End > Beg; End-- ) + { + Kit_TruthExistNew( p->puTemp2, pIsf->puOff, p->nVars, pVars[End] ); + if ( Kit_TruthIsDisjoint3(pIsf->puOn, p->puTemp1, p->puTemp2, p->nVars) ) + { + pIsfL->uSupp = (1 << Beg); + pIsfR->uSupp = (1 << End); + pIsfL->Var = Beg; + pIsfR->Var = End; + return 1; + } + } + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Checks existence of weak OR-bidecomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Bdc_DecomposeWeakOr( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR ) +{ + int v, VarCost, VarBest, Cost, VarCostBest = 0; + + for ( v = 0; v < p->nVars; v++ ) + { + Kit_TruthExistNew( p->puTemp1, pIsf->puOff, p->nVars, v ); +// if ( (Q & !bdd_exist( R, VarSetXa )) != bddfalse ) +// Exist = Cudd_bddExistAbstract( dd, pF->R, Var ); Cudd_Ref( Exist ); +// if ( Cudd_bddIteConstant( dd, pF->Q, Cudd_Not(Exist), b0 ) != b0 ) + if ( !Kit_TruthIsImply( pIsf->puOn, p->puTemp1, p->nVars ) ) + { + // measure the cost of this variable +// VarCost = bdd_satcountset( bdd_forall( Q, VarSetXa ), VarCube ); + +// Univ = Cudd_bddUnivAbstract( dd, pF->Q, Var ); Cudd_Ref( Univ ); +// VarCost = Kit_TruthCountOnes( Univ, p->nVars ); +// Cudd_RecursiveDeref( dd, Univ ); + + Kit_TruthForallNew( p->puTemp2, pIsf->puOn, p->nVars, v ); + VarCost = Kit_TruthCountOnes( p->puTemp2, p->nVars ); + if ( VarCost == 0 ) + VarCost = 1; + if ( VarCostBest < VarCost ) + { + VarCostBest = VarCost; + VarBest = v; + } + } + } + + // derive the components for weak-bi-decomposition if the variable is found + if ( VarCostBest ) + { +// funQLeftRes = Q & bdd_exist( R, setRightORweak ); + +// Temp = Cudd_bddExistAbstract( dd, pF->R, VarBest ); Cudd_Ref( Temp ); +// pL->Q = Cudd_bddAnd( dd, pF->Q, Temp ); Cudd_Ref( pL->Q ); +// Cudd_RecursiveDeref( dd, Temp ); + + Kit_TruthExistNew( p->puTemp1, pIsf->puOff, p->nVars, VarBest ); + Kit_TruthAnd( pIsfL->puOn, pIsf->puOn, p->puTemp1, p->nVars ); + +// pL->R = pF->R; Cudd_Ref( pL->R ); +// pL->V = VarBest; Cudd_Ref( pL->V ); + Kit_TruthCopy( pIsfL->puOff, pIsf->puOff, p->nVars ); + pIsfL->Var = VarBest; + +// assert( pL->Q != b0 ); +// assert( pL->R != b0 ); +// assert( Cudd_bddIteConstant( dd, pL->Q, pL->R, b0 ) == b0 ); + + // express cost in percents of the covered boolean space + Cost = VarCostBest * BDC_SCALE / (1<<p->nVars); + if ( Cost == 0 ) + Cost = 1; + return Cost; + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Checks existence of OR-bidecomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Bdc_DecomposeOr( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR ) +{ + unsigned uSuppRem; + int v, nLeftVars = 1, nRightVars = 1; + // clean the var sets + Bdc_IsfClean( pIsfL ); + Bdc_IsfClean( pIsfR ); + // find initial variable sets + if ( !Bdc_DecomposeFindInitialVarSet( p, pIsf, pIsfL, pIsfR ) ) + return Bdc_DecomposeWeakOr( p, pIsf, pIsfL, pIsfR ); + // prequantify the variables in the offset + Kit_TruthExistNew( p->puTemp1, pIsf->puOff, p->nVars, pIsfL->Var ); + Kit_TruthExistNew( p->puTemp2, pIsf->puOff, p->nVars, pIsfR->Var ); + // go through the remaining variables + uSuppRem = pIsf->uSupp & ~pIsfL->uSupp & ~pIsfR->uSupp; + assert( Kit_WordCountOnes(uSuppRem) > 0 ); + for ( v = 0; v < p->nVars; v++ ) + { + if ( (uSuppRem & (1 << v)) == 0 ) + continue; + // prequantify this variable + Kit_TruthExistNew( p->puTemp3, p->puTemp1, p->nVars, v ); + Kit_TruthExistNew( p->puTemp4, p->puTemp2, p->nVars, v ); + if ( nLeftVars < nRightVars ) + { +// if ( (Q & bdd_exist( pF->R, pL->V & VarNew ) & bdd_exist( pF->R, pR->V )) == bddfalse ) +// if ( VerifyORCondition( dd, pF->Q, pF->R, pL->V, pR->V, VarNew ) ) + if ( Kit_TruthIsDisjoint3(pIsf->puOn, p->puTemp3, p->puTemp2, p->nVars) ) + { +// pL->V &= VarNew; + pIsfL->uSupp |= (1 << v); + nLeftVars++; + } +// else if ( (Q & bdd_exist( pF->R, pR->V & VarNew ) & bdd_exist( pF->R, pL->V )) == bddfalse ) + else if ( Kit_TruthIsDisjoint3(pIsf->puOn, p->puTemp4, p->puTemp1, p->nVars) ) + { +// pR->V &= VarNew; + pIsfR->uSupp |= (1 << v); + nRightVars++; + } + } + else + { +// if ( (Q & bdd_exist( pF->R, pR->V & VarNew ) & bdd_exist( pF->R, pL->V )) == bddfalse ) + if ( Kit_TruthIsDisjoint3(pIsf->puOn, p->puTemp4, p->puTemp1, p->nVars) ) + { +// pR->V &= VarNew; + pIsfR->uSupp |= (1 << v); + nRightVars++; + } +// else if ( (Q & bdd_exist( pF->R, pL->V & VarNew ) & bdd_exist( pF->R, pR->V )) == bddfalse ) + else if ( Kit_TruthIsDisjoint3(pIsf->puOn, p->puTemp3, p->puTemp2, p->nVars) ) + { +// pL->V &= VarNew; + pIsfL->uSupp |= (1 << v); + nLeftVars++; + } + } + } + + // derive the functions Q and R for the left branch +// pL->Q = bdd_appex( pF->Q, bdd_exist( pF->R, pL->V ), bddop_and, pR->V ); +// pL->R = bdd_exist( pF->R, pR->V ); + +// Temp = Cudd_bddExistAbstract( dd, pF->R, pL->V ); Cudd_Ref( Temp ); +// pL->Q = Cudd_bddAndAbstract( dd, pF->Q, Temp, pR->V ); Cudd_Ref( pL->Q ); +// Cudd_RecursiveDeref( dd, Temp ); +// pL->R = Cudd_bddExistAbstract( dd, pF->R, pR->V ); Cudd_Ref( pL->R ); + + Kit_TruthAnd( pIsfL->puOn, pIsf->puOn, p->puTemp1, p->nVars ); + Kit_TruthExistSet( pIsfL->puOn, pIsfL->puOn, p->nVars, pIsfR->uSupp ); + Kit_TruthCopy( pIsfL->puOff, p->puTemp2, p->nVars ); + + // derive the functions Q and R for the right branch +// Temp = Cudd_bddExistAbstract( dd, pF->R, pR->V ); Cudd_Ref( Temp ); +// pR->Q = Cudd_bddAndAbstract( dd, pF->Q, Temp, pL->V ); Cudd_Ref( pR->Q ); +// Cudd_RecursiveDeref( dd, Temp ); +// pR->R = Cudd_bddExistAbstract( dd, pF->R, pL->V ); Cudd_Ref( pR->R ); + +/* + Kit_TruthAnd( pIsfR->puOn, pIsf->puOn, p->puTemp2, p->nVars ); + Kit_TruthExistSet( pIsfR->puOn, pIsfR->puOn, p->nVars, pIsfL->uSupp ); + Kit_TruthCopy( pIsfR->puOff, p->puTemp1, p->nVars ); +*/ + +// assert( pL->Q != b0 ); +// assert( pL->R != b0 ); +// assert( Cudd_bddIteConstant( dd, pL->Q, pL->R, b0 ) == b0 ); + assert( !Kit_TruthIsConst0(pIsfL->puOn, p->nVars) ); + assert( !Kit_TruthIsConst0(pIsfL->puOff, p->nVars) ); + assert( Kit_TruthIsDisjoint(pIsfL->puOn, pIsfL->puOff, p->nVars) ); + + return Bdc_DecomposeGetCost( p, nLeftVars, nRightVars ); +} + +/**Function************************************************************* + + Synopsis [Performs one step of bi-decomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Bdc_Type_t Bdc_DecomposeStep( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR ) +{ + int CostOr, CostAnd, CostOrL, CostOrR, CostAndL, CostAndR; + + Bdc_IsfClean( p->pIsfOL ); + Bdc_IsfClean( p->pIsfOR ); + Bdc_IsfClean( p->pIsfAL ); + Bdc_IsfClean( p->pIsfAR ); + + // perform OR decomposition + CostOr = Bdc_DecomposeOr( p, pIsf, p->pIsfOL, p->pIsfOR ); + + // perform AND decomposition + Bdc_IsfNot( pIsf ); + CostAnd = Bdc_DecomposeOr( p, pIsf, p->pIsfAL, p->pIsfAR ); + Bdc_IsfNot( pIsf ); + Bdc_IsfNot( p->pIsfAL ); + Bdc_IsfNot( p->pIsfAR ); + + // check the hash table + Bdc_SuppMinimize( p, p->pIsfOL ); + CostOrL = (Bdc_TableLookup(p, p->pIsfOL) != NULL); + Bdc_SuppMinimize( p, p->pIsfOR ); + CostOrR = (Bdc_TableLookup(p, p->pIsfOR) != NULL); + Bdc_SuppMinimize( p, p->pIsfAL ); + CostAndL = (Bdc_TableLookup(p, p->pIsfAL) != NULL); + Bdc_SuppMinimize( p, p->pIsfAR ); + CostAndR = (Bdc_TableLookup(p, p->pIsfAR) != NULL); + + // check if there is any reuse for the components + if ( CostOrL + CostOrR < CostAndL + CostAndR ) + { + Bdc_IsfCopy( pIsfL, p->pIsfOL ); + Bdc_IsfCopy( pIsfR, p->pIsfOR ); + return BDC_TYPE_OR; + } + if ( CostOrL + CostOrR > CostAndL + CostAndR ) + { + Bdc_IsfCopy( pIsfL, p->pIsfAL ); + Bdc_IsfCopy( pIsfR, p->pIsfAR ); + return BDC_TYPE_AND; + } + + // compare the two-component costs + if ( CostOr < CostAnd ) + { + Bdc_IsfCopy( pIsfL, p->pIsfOL ); + Bdc_IsfCopy( pIsfR, p->pIsfOR ); + return BDC_TYPE_OR; + } + return BDC_TYPE_AND; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/bdc/bdcInt.h b/src/aig/bdc/bdcInt.h new file mode 100644 index 00000000..9649f870 --- /dev/null +++ b/src/aig/bdc/bdcInt.h @@ -0,0 +1,150 @@ +/**CFile**************************************************************** + + FileName [bdcInt.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Truth-table-based bi-decomposition engine.] + + Synopsis [Internal declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - January 15, 2007.] + + Revision [$Id: resInt.h,v 1.00 2007/01/15 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __BDC_INT_H__ +#define __BDC_INT_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include "kit.h" +#include "bdc.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +#define BDC_SCALE 100 // value used to compute the cost + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +// network types +typedef enum { + BDC_TYPE_NONE = 0, // 0: unknown + BDC_TYPE_CONST1, // 1: constant 1 + BDC_TYPE_PI, // 2: primary input + BDC_TYPE_AND, // 4: AND-gate + BDC_TYPE_OR, // 5: OR-gate (temporary) + BDC_TYPE_XOR, // 6: XOR-gate + BDC_TYPE_MUX, // 7: MUX-gate + BDC_TYPE_OTHER // 8: unused +} Bdc_Type_t; + +typedef struct Bdc_Fun_t_ Bdc_Fun_t; +struct Bdc_Fun_t_ +{ + int Type; // Const1, PI, AND, XOR, MUX + Bdc_Fun_t * pFan0; // fanin of the given node + Bdc_Fun_t * pFan1; // fanin of the given node + Bdc_Fun_t * pFan2; // fanin of the given node + unsigned uSupp; // bit mask of current support + unsigned * puFunc; // the function of the node + Bdc_Fun_t * pNext; // next function with same support + void * pCopy; // the copy field +}; + +typedef struct Bdc_Isf_t_ Bdc_Isf_t; +struct Bdc_Isf_t_ +{ + int Var; // the first variable assigned + unsigned uSupp; // the current support + unsigned * puOn; // on-set + unsigned * puOff; // off-set +}; + +struct Bdc_Man_t_ +{ + // external parameters + Bdc_Par_t * pPars; // parameter set + int nVars; // the number of variables + int nWords; // the number of words + int nNodesLimit; // the limit on the number of new nodes + int nDivsLimit; // the limit on the number of divisors + // internal nodes + Bdc_Fun_t * pNodes; // storage for decomposition nodes + int nNodes; // the number of nodes used + int nNodesNew; // the number of nodes used + int nNodesAlloc; // the number of nodes allocated + Bdc_Fun_t * pRoot; // the root node + // resub candidates + Bdc_Fun_t ** pTable; // hash table of candidates + int nTableSize; // hash table size (1 << nVarsMax) + Vec_Int_t * vSpots; // the occupied spots in the table + // elementary truth tables + Vec_Ptr_t * vTruths; // for const 1 and elementary variables + unsigned * puTemp1; // temporary truth table + unsigned * puTemp2; // temporary truth table + unsigned * puTemp3; // temporary truth table + unsigned * puTemp4; // temporary truth table + // temporary ISFs + Bdc_Isf_t * pIsfOL, IsfOL; + Bdc_Isf_t * pIsfOR, IsfOR; + Bdc_Isf_t * pIsfAL, IsfAL; + Bdc_Isf_t * pIsfAR, IsfAR; + // internal memory manager + Vec_Int_t * vMemory; // memory for internal truth tables +}; + +// working with complemented attributes of objects +static inline int Bdc_IsComplement( Bdc_Fun_t * p ) { return (int)((unsigned long)p & (unsigned long)01); } +static inline Bdc_Fun_t * Bdc_Regular( Bdc_Fun_t * p ) { return (Bdc_Fun_t *)((unsigned long)p & ~(unsigned long)01); } +static inline Bdc_Fun_t * Bdc_Not( Bdc_Fun_t * p ) { return (Bdc_Fun_t *)((unsigned long)p ^ (unsigned long)01); } +static inline Bdc_Fun_t * Bdc_NotCond( Bdc_Fun_t * p, int c ) { return (Bdc_Fun_t *)((unsigned long)p ^ (unsigned long)(c!=0)); } + +static inline Bdc_Fun_t * Bdc_FunNew( Bdc_Man_t * p ) { Bdc_Fun_t * pRes; if ( p->nNodes == p->nNodesLimit ) return NULL; pRes = p->pNodes + p->nNodes++; memset( pRes, 0, sizeof(Bdc_Fun_t) ); p->nNodesNew++; return pRes; } +static inline void Bdc_IsfStart( Bdc_Man_t * p, Bdc_Isf_t * pF ) { pF->puOn = Vec_IntFetch( p->vMemory, p->nWords ); pF->puOff = Vec_IntFetch( p->vMemory, p->nWords ); } +static inline void Bdc_IsfClean( Bdc_Isf_t * p ) { p->uSupp = 0; p->Var = 0; } +static inline void Bdc_IsfCopy( Bdc_Isf_t * p, Bdc_Isf_t * q ) { Bdc_Isf_t T = *p; *p = *q; *q = T; } +static inline void Bdc_IsfNot( Bdc_Isf_t * p ) { unsigned * puT = p->puOn; p->puOn = p->puOff; p->puOff = puT; } + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== bdcDec.c ==========================================================*/ +extern Bdc_Fun_t * Bdc_ManDecompose_rec( Bdc_Man_t * p, Bdc_Isf_t * pIsf ); +/*=== bdcTable.c ==========================================================*/ +extern Bdc_Fun_t * Bdc_TableLookup( Bdc_Man_t * p, Bdc_Isf_t * pIsf ); +extern void Bdc_TableAdd( Bdc_Man_t * p, Bdc_Fun_t * pFunc ); +extern void Bdc_TableClear( Bdc_Man_t * p ); +extern void Bdc_SuppMinimize( Bdc_Man_t * p, Bdc_Isf_t * pIsf ); +extern int Bdc_TableCheckContainment( Bdc_Man_t * p, Bdc_Isf_t * pIsf, unsigned * puTruth ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/bdc/bdcTable.c b/src/aig/bdc/bdcTable.c new file mode 100644 index 00000000..d86a938d --- /dev/null +++ b/src/aig/bdc/bdcTable.c @@ -0,0 +1,140 @@ +/**CFile**************************************************************** + + FileName [bdcTable.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Truth-table-based bi-decomposition engine.] + + Synopsis [Hash table for intermediate nodes.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - January 30, 2007.] + + Revision [$Id: bdcTable.c,v 1.00 2007/01/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "bdcInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Minimizes the support of the ISF.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bdc_SuppMinimize( Bdc_Man_t * p, Bdc_Isf_t * pIsf ) +{ + int v; + // go through the support variables + for ( v = 0; v < p->nVars; v++ ) + { + if ( (pIsf->uSupp & (1 << v)) == 0 ) + continue; + Kit_TruthExistNew( p->puTemp1, pIsf->puOn, p->nVars, v ); + Kit_TruthExistNew( p->puTemp2, pIsf->puOff, p->nVars, v ); + if ( !Kit_TruthIsDisjoint( p->puTemp1, p->puTemp2, p->nVars ) ) + continue; + // remove the variable + Kit_TruthCopy( pIsf->puOn, p->puTemp1, p->nVars ); + Kit_TruthCopy( pIsf->puOff, p->puTemp2, p->nVars ); + pIsf->uSupp &= ~(1 << v); + } +} + +/**Function************************************************************* + + Synopsis [Checks containment of the function in the ISF.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Bdc_TableCheckContainment( Bdc_Man_t * p, Bdc_Isf_t * pIsf, unsigned * puTruth ) +{ + return Kit_TruthIsImply( pIsf->puOn, puTruth, p->nVars ) && + Kit_TruthIsDisjoint( pIsf->puOff, puTruth, p->nVars ); +} + +/**Function************************************************************* + + Synopsis [Adds the new entry to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Bdc_Fun_t * Bdc_TableLookup( Bdc_Man_t * p, Bdc_Isf_t * pIsf ) +{ + Bdc_Fun_t * pFunc; + for ( pFunc = p->pTable[pIsf->uSupp]; pFunc; pFunc = pFunc->pNext ) + if ( Bdc_TableCheckContainment( p, pIsf, pFunc->puFunc ) ) + return pFunc; + return NULL; +} + +/**Function************************************************************* + + Synopsis [Adds the new entry to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bdc_TableAdd( Bdc_Man_t * p, Bdc_Fun_t * pFunc ) +{ + if ( p->pTable[pFunc->uSupp] == NULL ) + Vec_IntPush( p->vSpots, pFunc->uSupp ); + pFunc->pNext = p->pTable[pFunc->uSupp]; + p->pTable[pFunc->uSupp] = pFunc; +} + +/**Function************************************************************* + + Synopsis [Adds the new entry to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Bdc_TableClear( Bdc_Man_t * p ) +{ + int Spot, i; + Vec_IntForEachEntry( p->vSpots, Spot, i ) + p->pTable[Spot] = NULL; + Vec_IntClear( p->vSpots ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/bdc/bdc_.c b/src/aig/bdc/bdc_.c new file mode 100644 index 00000000..9d0a9462 --- /dev/null +++ b/src/aig/bdc/bdc_.c @@ -0,0 +1,49 @@ +/**CFile**************************************************************** + + FileName [bdc_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Truth-table-based bi-decomposition engine.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - January 30, 2007.] + + Revision [$Id: bdc_.c,v 1.00 2007/01/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "bdcInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/bdc/module.make b/src/aig/bdc/module.make new file mode 100644 index 00000000..8697c998 --- /dev/null +++ b/src/aig/bdc/module.make @@ -0,0 +1,4 @@ +SRC += src/aig/bdc/bdcCore.c \ + src/aig/bdc/bdcDec.c \ + src/aig/bdc/bdcTable.c + diff --git a/src/aig/cnf/cnf.h b/src/aig/cnf/cnf.h new file mode 100644 index 00000000..5c7a594e --- /dev/null +++ b/src/aig/cnf/cnf.h @@ -0,0 +1,162 @@ +/**CFile**************************************************************** + + FileName [cnf.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnf.h,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __CNF_H__ +#define __CNF_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +#include "vec.h" +#include "aig.h" +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Cnf_Man_t_ Cnf_Man_t; +typedef struct Cnf_Dat_t_ Cnf_Dat_t; +typedef struct Cnf_Cut_t_ Cnf_Cut_t; + +// the CNF asserting outputs of AIG to be 1 +struct Cnf_Dat_t_ +{ + Aig_Man_t * pMan; // the AIG manager, for which CNF is computed + int nVars; // the number of variables + int nLiterals; // the number of CNF literals + int nClauses; // the number of CNF clauses + int ** pClauses; // the CNF clauses + int * pVarNums; // the number of CNF variable for each node ID (-1 if unused) +}; + +// the cut used to represent node in the AIG +struct Cnf_Cut_t_ +{ + char nFanins; // the number of leaves + char Cost; // the cost of this cut + short nWords; // the number of words in truth table + Vec_Int_t * vIsop[2]; // neg/pos ISOPs + int pFanins[0]; // the fanins (followed by the truth table) +}; + +// the CNF computation manager +struct Cnf_Man_t_ +{ + Aig_Man_t * pManAig; // the underlying AIG manager + char * pSopSizes; // sizes of SOPs for 4-variable functions + char ** pSops; // the SOPs for 4-variable functions + int aArea; // the area of the mapping + Aig_MmFlex_t * pMemCuts; // memory manager for cuts + int nMergeLimit; // the limit on the size of merged cut + unsigned * pTruths[4]; // temporary truth tables + Vec_Int_t * vMemory; // memory for intermediate ISOP representation + int timeCuts; + int timeMap; + int timeSave; +}; + + +static inline Dar_Cut_t * Dar_ObjBestCut( Aig_Obj_t * pObj ) { Dar_Cut_t * pCut; int i; Dar_ObjForEachCut( pObj, pCut, i ) if ( pCut->fBest ) return pCut; return NULL; } + +static inline int Cnf_CutSopCost( Cnf_Man_t * p, Dar_Cut_t * pCut ) { return p->pSopSizes[pCut->uTruth] + p->pSopSizes[0xFFFF & ~pCut->uTruth]; } + +static inline int Cnf_CutLeaveNum( Cnf_Cut_t * pCut ) { return pCut->nFanins; } +static inline int * Cnf_CutLeaves( Cnf_Cut_t * pCut ) { return pCut->pFanins; } +static inline unsigned * Cnf_CutTruth( Cnf_Cut_t * pCut ) { return (unsigned *)(pCut->pFanins + pCut->nFanins); } + +static inline Cnf_Cut_t * Cnf_ObjBestCut( Aig_Obj_t * pObj ) { return pObj->pData; } +static inline void Cnf_ObjSetBestCut( Aig_Obj_t * pObj, Cnf_Cut_t * pCut ) { pObj->pData = pCut; } + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over leaves of the cut +#define Cnf_CutForEachLeaf( p, pCut, pLeaf, i ) \ + for ( i = 0; (i < (int)(pCut)->nFanins) && ((pLeaf) = Aig_ManObj(p, (pCut)->pFanins[i])); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== cnfCore.c ========================================================*/ +extern Cnf_Dat_t * Cnf_Derive( Aig_Man_t * pAig, int nOutputs ); +extern Cnf_Man_t * Cnf_ManRead(); +extern void Cnf_ClearMemory(); +/*=== cnfCut.c ========================================================*/ +extern Cnf_Cut_t * Cnf_CutCreate( Cnf_Man_t * p, Aig_Obj_t * pObj ); +extern void Cnf_CutPrint( Cnf_Cut_t * pCut ); +extern void Cnf_CutFree( Cnf_Cut_t * pCut ); +extern void Cnf_CutUpdateRefs( Cnf_Man_t * p, Cnf_Cut_t * pCut, Cnf_Cut_t * pCutFan, Cnf_Cut_t * pCutRes ); +extern Cnf_Cut_t * Cnf_CutCompose( Cnf_Man_t * p, Cnf_Cut_t * pCut, Cnf_Cut_t * pCutFan, int iFan ); +/*=== cnfData.c ========================================================*/ +extern void Cnf_ReadMsops( char ** ppSopSizes, char *** ppSops ); +/*=== cnfMan.c ========================================================*/ +extern Cnf_Man_t * Cnf_ManStart(); +extern void Cnf_ManStop( Cnf_Man_t * p ); +extern Vec_Int_t * Cnf_DataCollectPiSatNums( Cnf_Dat_t * pCnf, Aig_Man_t * p ); +extern void Cnf_DataFree( Cnf_Dat_t * p ); +extern void Cnf_DataWriteIntoFile( Cnf_Dat_t * p, char * pFileName, int fReadable ); +void * Cnf_DataWriteIntoSolver( Cnf_Dat_t * p ); +/*=== cnfMap.c ========================================================*/ +extern void Cnf_DeriveMapping( Cnf_Man_t * p ); +extern int Cnf_ManMapForCnf( Cnf_Man_t * p ); +/*=== cnfPost.c ========================================================*/ +extern void Cnf_ManTransferCuts( Cnf_Man_t * p ); +extern void Cnf_ManFreeCuts( Cnf_Man_t * p ); +extern void Cnf_ManPostprocess( Cnf_Man_t * p ); +/*=== cnfUtil.c ========================================================*/ +extern Vec_Ptr_t * Aig_ManScanMapping( Cnf_Man_t * p, int fCollect ); +extern Vec_Ptr_t * Cnf_ManScanMapping( Cnf_Man_t * p, int fCollect, int fPreorder ); +/*=== cnfWrite.c ========================================================*/ +extern void Cnf_SopConvertToVector( char * pSop, int nCubes, Vec_Int_t * vCover ); +extern Cnf_Dat_t * Cnf_ManWriteCnf( Cnf_Man_t * p, Vec_Ptr_t * vMapped, int nOutputs ); +extern Cnf_Dat_t * Cnf_DeriveSimple( Aig_Man_t * p, int nOutputs ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/cnf/cnfCore.c b/src/aig/cnf/cnfCore.c new file mode 100644 index 00000000..06731451 --- /dev/null +++ b/src/aig/cnf/cnfCore.c @@ -0,0 +1,185 @@ +/**CFile**************************************************************** + + FileName [cnfCore.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfCore.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Cnf_Man_t * s_pManCnf = NULL; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Converts AIG into the SAT solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Dat_t * Cnf_Derive( Aig_Man_t * pAig, int nOutputs ) +{ + Cnf_Man_t * p; + Cnf_Dat_t * pCnf; + Vec_Ptr_t * vMapped; + Aig_MmFixed_t * pMemCuts; + int clk; + // allocate the CNF manager + if ( s_pManCnf == NULL ) + s_pManCnf = Cnf_ManStart(); + // connect the managers + p = s_pManCnf; + p->pManAig = pAig; + + // generate cuts for all nodes, assign cost, and find best cuts +clk = clock(); + pMemCuts = Dar_ManComputeCuts( pAig, 10 ); +p->timeCuts = clock() - clk; + + // find the mapping +clk = clock(); + Cnf_DeriveMapping( p ); +p->timeMap = clock() - clk; +// Aig_ManScanMapping( p, 1 ); + + // convert it into CNF +clk = clock(); + Cnf_ManTransferCuts( p ); + vMapped = Cnf_ManScanMapping( p, 1, 1 ); + pCnf = Cnf_ManWriteCnf( p, vMapped, nOutputs ); + Vec_PtrFree( vMapped ); + Aig_MmFixedStop( pMemCuts, 0 ); +p->timeSave = clock() - clk; + + // reset reference counters + Aig_ManResetRefs( pAig ); +//PRT( "Cuts ", p->timeCuts ); +//PRT( "Map ", p->timeMap ); +//PRT( "Saving ", p->timeSave ); + return pCnf; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Man_t * Cnf_ManRead() +{ + return s_pManCnf; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ClearMemory() +{ + if ( s_pManCnf == NULL ) + return; + Cnf_ManStop( s_pManCnf ); + s_pManCnf = NULL; +} + + +#if 0 + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Dat_t * Cnf_Derive_old( Aig_Man_t * pAig ) +{ +/* + // iteratively improve area flow + for ( i = 0; i < nIters; i++ ) + { +clk = clock(); + Cnf_ManScanMapping( p, 0 ); + Cnf_ManMapForCnf( p ); +PRT( "iter ", clock() - clk ); + } +*/ + // write the file + vMapped = Aig_ManScanMapping( p, 1 ); + Vec_PtrFree( vMapped ); + +clk = clock(); + Cnf_ManTransferCuts( p ); + + Cnf_ManPostprocess( p ); + Cnf_ManScanMapping( p, 0 ); +/* + Cnf_ManPostprocess( p ); + Cnf_ManScanMapping( p, 0 ); + Cnf_ManPostprocess( p ); + Cnf_ManScanMapping( p, 0 ); +*/ +PRT( "Ext ", clock() - clk ); + +/* + vMapped = Cnf_ManScanMapping( p, 1 ); + pCnf = Cnf_ManWriteCnf( p, vMapped ); + Vec_PtrFree( vMapped ); + + // clean up + Cnf_ManFreeCuts( p ); + Dar_ManCutsFree( pAig ); + return pCnf; +*/ + Aig_MmFixedStop( pMemCuts, 0 ); + return NULL; +} + +#endif + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfCut.c b/src/aig/cnf/cnfCut.c new file mode 100644 index 00000000..17ab0c78 --- /dev/null +++ b/src/aig/cnf/cnfCut.c @@ -0,0 +1,371 @@ +/**CFile**************************************************************** + + FileName [cnfCut.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfCut.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates cut of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Cut_t * Cnf_CutAlloc( Cnf_Man_t * p, int nLeaves ) +{ + Cnf_Cut_t * pCut; + int nSize = sizeof(Cnf_Cut_t) + sizeof(int) * nLeaves + sizeof(unsigned) * Aig_TruthWordNum(nLeaves); + pCut = (Cnf_Cut_t *)Aig_MmFlexEntryFetch( p->pMemCuts, nSize ); + pCut->nFanins = nLeaves; + pCut->nWords = Aig_TruthWordNum(nLeaves); + pCut->vIsop[0] = pCut->vIsop[1] = NULL; + return pCut; +} + +/**Function************************************************************* + + Synopsis [Deallocates cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutFree( Cnf_Cut_t * pCut ) +{ + if ( pCut->vIsop[0] ) + Vec_IntFree( pCut->vIsop[0] ); + if ( pCut->vIsop[1] ) + Vec_IntFree( pCut->vIsop[1] ); +} + +/**Function************************************************************* + + Synopsis [Creates cut for the given node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Cut_t * Cnf_CutCreate( Cnf_Man_t * p, Aig_Obj_t * pObj ) +{ + Dar_Cut_t * pCutBest; + Cnf_Cut_t * pCut; + unsigned * pTruth; + assert( Aig_ObjIsNode(pObj) ); + pCutBest = Dar_ObjBestCut( pObj ); + assert( pCutBest != NULL ); + assert( pCutBest->nLeaves <= 4 ); + pCut = Cnf_CutAlloc( p, pCutBest->nLeaves ); + memcpy( pCut->pFanins, pCutBest->pLeaves, sizeof(int) * pCutBest->nLeaves ); + pTruth = Cnf_CutTruth(pCut); + *pTruth = (pCutBest->uTruth << 16) | pCutBest->uTruth; + pCut->Cost = Cnf_CutSopCost( p, pCutBest ); + return pCut; +} + +/**Function************************************************************* + + Synopsis [Deallocates cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutPrint( Cnf_Cut_t * pCut ) +{ + int i; + printf( "{" ); + for ( i = 0; i < pCut->nFanins; i++ ) + printf( "%d ", pCut->pFanins[i] ); + printf( " } " ); +} + +/**Function************************************************************* + + Synopsis [Allocates cut of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutDeref( Cnf_Man_t * p, Cnf_Cut_t * pCut ) +{ + Aig_Obj_t * pObj; + int i; + Cnf_CutForEachLeaf( p->pManAig, pCut, pObj, i ) + { + assert( pObj->nRefs > 0 ); + pObj->nRefs--; + } +} + +/**Function************************************************************* + + Synopsis [Allocates cut of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutRef( Cnf_Man_t * p, Cnf_Cut_t * pCut ) +{ + Aig_Obj_t * pObj; + int i; + Cnf_CutForEachLeaf( p->pManAig, pCut, pObj, i ) + { + pObj->nRefs++; + } +} + +/**Function************************************************************* + + Synopsis [Allocates cut of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutUpdateRefs( Cnf_Man_t * p, Cnf_Cut_t * pCut, Cnf_Cut_t * pCutFan, Cnf_Cut_t * pCutRes ) +{ + Cnf_CutDeref( p, pCut ); + Cnf_CutDeref( p, pCutFan ); + Cnf_CutRef( p, pCutRes ); +} + +/**Function************************************************************* + + Synopsis [Merges two arrays of integers.] + + Description [Returns the number of items.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cnf_CutMergeLeaves( Cnf_Cut_t * pCut, Cnf_Cut_t * pCutFan, int * pFanins ) +{ + int i, k, nFanins = 0; + for ( i = k = 0; i < pCut->nFanins && k < pCutFan->nFanins; ) + { + if ( pCut->pFanins[i] == pCutFan->pFanins[k] ) + pFanins[nFanins++] = pCut->pFanins[i], i++, k++; + else if ( pCut->pFanins[i] < pCutFan->pFanins[k] ) + pFanins[nFanins++] = pCut->pFanins[i], i++; + else + pFanins[nFanins++] = pCutFan->pFanins[k], k++; + } + for ( ; i < pCut->nFanins; i++ ) + pFanins[nFanins++] = pCut->pFanins[i]; + for ( ; k < pCutFan->nFanins; k++ ) + pFanins[nFanins++] = pCutFan->pFanins[k]; + return nFanins; +} + +/**Function************************************************************* + + Synopsis [Computes the stretching phase of the cut w.r.t. the merged cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Cnf_TruthPhase( Cnf_Cut_t * pCut, Cnf_Cut_t * pCut1 ) +{ + unsigned uPhase = 0; + int i, k; + for ( i = k = 0; i < pCut->nFanins; i++ ) + { + if ( k == pCut1->nFanins ) + break; + if ( pCut->pFanins[i] < pCut1->pFanins[k] ) + continue; + assert( pCut->pFanins[i] == pCut1->pFanins[k] ); + uPhase |= (1 << i); + k++; + } + return uPhase; +} + +/**Function************************************************************* + + Synopsis [Removes the fanin variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutRemoveIthVar( Cnf_Cut_t * pCut, int iVar, int iFan ) +{ + int i; + assert( pCut->pFanins[iVar] == iFan ); + pCut->nFanins--; + for ( i = iVar; i < pCut->nFanins; i++ ) + pCut->pFanins[i] = pCut->pFanins[i+1]; +} + +/**Function************************************************************* + + Synopsis [Inserts the fanin variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutInsertIthVar( Cnf_Cut_t * pCut, int iVar, int iFan ) +{ + int i; + for ( i = pCut->nFanins; i > iVar; i-- ) + pCut->pFanins[i] = pCut->pFanins[i-1]; + pCut->pFanins[iVar] = iFan; + pCut->nFanins++; +} + +/**Function************************************************************* + + Synopsis [Merges two cuts.] + + Description [Returns NULL of the cuts cannot be merged.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Cut_t * Cnf_CutCompose( Cnf_Man_t * p, Cnf_Cut_t * pCut, Cnf_Cut_t * pCutFan, int iFan ) +{ + Cnf_Cut_t * pCutRes; + static int pFanins[32]; + unsigned * pTruth, * pTruthFan, * pTruthRes; + unsigned * pTop = p->pTruths[0], * pFan = p->pTruths[2], * pTemp = p->pTruths[3]; + unsigned uPhase, uPhaseFan; + int i, iVar, nFanins, RetValue; + + // make sure the second cut is the fanin of the first + for ( iVar = 0; iVar < pCut->nFanins; iVar++ ) + if ( pCut->pFanins[iVar] == iFan ) + break; + assert( iVar < pCut->nFanins ); + // remove this variable + Cnf_CutRemoveIthVar( pCut, iVar, iFan ); + // merge leaves of the cuts + nFanins = Cnf_CutMergeLeaves( pCut, pCutFan, pFanins ); + if ( nFanins+1 > p->nMergeLimit ) + { + Cnf_CutInsertIthVar( pCut, iVar, iFan ); + return NULL; + } + // create new cut + pCutRes = Cnf_CutAlloc( p, nFanins ); + memcpy( pCutRes->pFanins, pFanins, sizeof(int) * nFanins ); + assert( pCutRes->nFanins <= pCut->nFanins + pCutFan->nFanins ); + + // derive its truth table + // get the truth tables in the composition space + pTruth = Cnf_CutTruth(pCut); + pTruthFan = Cnf_CutTruth(pCutFan); + pTruthRes = Cnf_CutTruth(pCutRes); + for ( i = 0; i < 2*pCutRes->nWords; i++ ) + pTop[i] = pTruth[i % pCut->nWords]; + for ( i = 0; i < pCutRes->nWords; i++ ) + pFan[i] = pTruthFan[i % pCutFan->nWords]; + // move the variable to the end + uPhase = Kit_BitMask( pCutRes->nFanins+1 ) & ~(1 << iVar); + Kit_TruthShrink( pTemp, pTop, pCutRes->nFanins, pCutRes->nFanins+1, uPhase, 1 ); + // compute the phases + uPhase = Cnf_TruthPhase( pCutRes, pCut ) | (1 << pCutRes->nFanins); + uPhaseFan = Cnf_TruthPhase( pCutRes, pCutFan ); + // permute truth-tables to the common support + Kit_TruthStretch( pTemp, pTop, pCut->nFanins+1, pCutRes->nFanins+1, uPhase, 1 ); + Kit_TruthStretch( pTemp, pFan, pCutFan->nFanins, pCutRes->nFanins, uPhaseFan, 1 ); + // perform Boolean operation + Kit_TruthMux( pTruthRes, pTop, pTop+pCutRes->nWords, pFan, pCutRes->nFanins ); + // return the cut to its original condition + Cnf_CutInsertIthVar( pCut, iVar, iFan ); + // consider the simple case + if ( pCutRes->nFanins < 5 ) + { + pCutRes->Cost = p->pSopSizes[0xFFFF & *pTruthRes] + p->pSopSizes[0xFFFF & ~*pTruthRes]; + return pCutRes; + } + + // derive ISOP for positive phase + RetValue = Kit_TruthIsop( pTruthRes, pCutRes->nFanins, p->vMemory, 0 ); + pCutRes->vIsop[1] = (RetValue == -1)? NULL : Vec_IntDup( p->vMemory ); + // derive ISOP for negative phase + Kit_TruthNot( pTruthRes, pTruthRes, pCutRes->nFanins ); + RetValue = Kit_TruthIsop( pTruthRes, pCutRes->nFanins, p->vMemory, 0 ); + pCutRes->vIsop[0] = (RetValue == -1)? NULL : Vec_IntDup( p->vMemory ); + Kit_TruthNot( pTruthRes, pTruthRes, pCutRes->nFanins ); + + // compute the cut cost + if ( pCutRes->vIsop[0] == NULL || pCutRes->vIsop[1] == NULL ) + pCutRes->Cost = 127; + else if ( Vec_IntSize(pCutRes->vIsop[0]) + Vec_IntSize(pCutRes->vIsop[1]) > 127 ) + pCutRes->Cost = 127; + else + pCutRes->Cost = Vec_IntSize(pCutRes->vIsop[0]) + Vec_IntSize(pCutRes->vIsop[1]); + return pCutRes; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfData.c b/src/aig/cnf/cnfData.c new file mode 100644 index 00000000..01f6ff8a --- /dev/null +++ b/src/aig/cnf/cnfData.c @@ -0,0 +1,4784 @@ +/**CFile**************************************************************** + + FileName [cnfData.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfData.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static char s_Data3[81] = "!#&()*+,-.0123456789:;<=>?ABCDEFGHIJKLMNOPQRSTUVWXYZ[]abcdefghijklmnopqrstuvwxyz|"; + +static char * s_Data4[] = { +"! B a . 8 .B 8a K !K T Ta j 8j Tj s ( + (B +a (. +8 .B( +8a (K +K T( +T j( ", +"+j Tj( s+ E !E H Ha E. 8E H. H8 EK EK! HT HTa jE 8jE Hj sH d +d Hd g d. 8d ", +"Hd. g8 dK +dK Td gT dj +jd Hjd gs 2 !2 2B a2 5 58 5B 5a 2K 2K! T2 Ta2 5j 58", +"j 5T s5 ; +; ;B a; 5; > 5;B >a ;K +;K T; +T; ;j >j 5T; s> E2 !E2 H2 Ha2 5E ", +"58E H5 H58 EK2 !E2K HT2 TaH2 5jE 8j5E H5T sH5 d; +d; H; g; 5d >d H5d g> dK;", +" dK+; H;T gT; 5dj >jd H;j gs> N !N NB aN N. 8N .BN 8aN Q Q! 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T<M a<M <Mj 8<M T", +"M<j s<M <*L +<L <L*B +La< *L<. +L8< *B<L. a*L8< <M* +<M <MT* T<+M M*<j 8<+M", +" <M*Tj +<sM <EL !E<L H<L HLa< EL<. <E8L <LH. HL8< <ME <!ME H<M a<HM Mj<E 8E", +"<M <MHj H<sM <dL +L<d HL<d g<L dL<. 8L<d <dLH. 8<gL <dM <d+M <dHM g<M dM<j ", +"<d8M <dMHj s<gM 4<L <L4! <L4B 4La< 5<L 4L8< <L5B 5La< 4M< 4!<M T<4M a<4M 5<", +"M 8<4M T<5M 4Ms< =L =+L =BL =aL =5L >=L 5B=L >L=a =M =M+ =TM =aM =M5 >M= 5T", +"=M s=M <E4L 4<E!L 4LH< 4Ha<L <E5L 48<EL HL5< 4H8<L 4E<M <ME4! H<4M 4HMa< 5E", +"<M 48M<E 5<HM s<H4M =dL +d=L =HL g=L 5d=L =d>L H5=L >Lg= =Md +M=d =HM g=M 5", +"d=M =d>M H5=M >Mg= <LN !L<N NB<L <LaN N.<L <N8L <LN.B 8<aLN Q<M Q!<M QT<M a", +"MQ< QM<j 8MQ< <MjQT Q<sM *L<N <L+N *B<LN a*L<N <*LN. +<8LN <LN*B. 8<La*N <M", +"Q* Q<+M <M*QT aM*Q< <M*Qj +Q<8M Q<TM*j s<+QM W<L <LW! HLW< WLa< <LW. WL8< H", +"<WL. 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U<D Ua< U<. U8< U.D< D8U< U<M U!<", +"M V< V<a U<j 8<Uj V<j s<V U<* U+< D<U* +DU< <*U. +<U8 U<D*. U+<D8 <MU* +MU<", +" V<* V+< <jU* +<Uj <jV* V+s< U<E <EU! UH< H<Ua <EU. UE8< U.H< H8U< UE<M <ME", +"U! V<H H<Va UE<j U8<ME H<Vj sHV< U<d +<Ud H<Ud gU< U.<d 8<Ud UH<d. U8g< <MU", +"d <dMU+ V<d gV< <dUj <dMU8 <dVj s<gV 4U< 4!U< U<4D U<4a U5< U<48 5DU< 5aU< ", +"U<4M <M!4U V4< 4aV< U<4j 4U8<M V5< V4s< =U =U+ =UD =Ua =U5 =U> U5=D >U=D =U", +"M U+=M V= V=+ =Uj =U>M V=5 s=V 4EU< 4U<!E U<4H 4UHa< UE5< 4U8<E H5U< 4UH8< ", +"<ME4U 4UE<M! 4HV< V4Ha< 4Uj<E <ME4U8 H5V< s<V4H =Ud U+=d =UH g=U U5=d =d>U ", +"UH=5 g>=U Ud=M =U+dM V=H V=g Ud=j >M=Ud V5=H gVs= U<N <NU! UND< UNa< <NU. U", +"N8< U<DN. U8<DN UQ< Q!U< V<Q QaV< Q<Uj Q8U< Q<Vj sQV< <*UN UN+< U<D*N U+<DN", +" U<*N. U+<8N D<NU*. a*NU8< Q<U* +QU< Q<V* +QV< UQ<*j U+Q8< V<Q*j s<V+Q UW< ", +"U!W< H<UW WaU< U.W< W8U< UH<W. UH8W< W<UQ UW<Q! Z<V ZaV< W<Uj UW8Q< ZjV< VZ", +"s< W<Ud +WU< UH<W* UWg< UW<d. U+W8< UHW<d. gU<W8 Q<Ud U+WQ< V<Z* Z<gV <djUW", +" U+W<j Z<Vdj gV<sZ U<m U!<m D<Um a<Um 5<Um 8<Um U5<Dm U5a<m U<4Q <MmU! V<m ", +"a<Vm pU< U8p< Vp< s<Vp =Um U+=m Um=D Ua=m U5=m >m=U =U5Dm =U>Dm =UQ U+=Q V=", +"Q V+=Q p=U p>=U V=p Vps= U<4W 4UW<! H<Um 4UWa< 5WU< 4UW8< UH5W< UH8<m <MmUW", +" <M!4UW V4Z< Z4Va< UWp< pU<W8 Z<Vp Vp<sZ =Uv =+vU vU=H gv=U =5vU v>=U =UvH5", +" g=Uv> vU=Q =Uv+Q Z=V gVZ= pv=U p=Uv> VpZ= yV= ,U< U<& U<,D c<U ,.U< U8b< ,", +"UD<. U8c< b<M <MU& V<b c<V U<,j 8<bM ,jV< Vsc< U<b* -U< ,UD<* -Uc< ,U<*. U8", +"-< U<Db*. c-U8< <Mb* b<-M b<V* V-< ,Uj<* U<-j V<b*j s<V- ,EU< UE<& UHb< UHc", +"< ,U<E. ,U8<E ,UH<. c<UH8 bE<M <M&bE ,HV< cHV< ,Uj<E <&jUE V<bHj s<VcH U<,d", +" U<-d ,UH<d c<gU ,Ud<. -U8<d <d.,UH gc<U8 <dbM -U<dM ,dV< g<V- <dMbj -Uj<d ", +"V<d,j V-gs< ,4U 4&,U 4U,D ,4cU 4U,5 4U,8 ,4U5D U5c< 4b,M <M&4b V4, V4c< 4U,", +"j <M&b5 ,4V5 V4s, =bU =U- ,U=D c=U ,U=5 ->=U =bU5D =Uc> =bM -U=M V=b c=V ,U", +"=j =b>M V5=b V-s= ,E4U ,4U&E 4U,H c4U,H ,4U5E ,4U8E ,4UH5 c5<UH ,4UME <ME4U", +"& ,4VH c4V,H ,4UjE <ME4b8 V4,H5 s,V4H ,U=d =d-U ,U=H gc=U =bU5d =b>Ud =bHU5", +" c=g>U bd=M =bM-d Vd=b gVc= =bM5d >M=bd V=bH5 c=Vgs ,NU< UN<& ,UD<N U<cN ,U", +"<N. ,U8<N U<N,D. c<U8N UQb< Q<U& ,QV< V<cQ ,UQ<j <&jUQ V<bQj s<VcQ ,U<*N U<", +"-N U<Db*N c-U<N U<Nb*. -U8<N ,NU<D*. -U8c<N ,UQ<* UQ-< V<bQ* V<-Q UQ<b*j -U", +"Q8< bQ<V*j V-sQ< UWb< W<U& ,UHW< UWc< ,UW<. ,UW8< ,U.WD< cW<U8 W<bM <M&bW V", +"<Zb VZc< ,UW<j <&jUW Zb<Vj Zc<Vs ,UW<d UW-< UH<bW* c-WU< <d.,UW -UW8< ,.UHW", +"<d cW8gU< <dMbW -UWQ< Zb<Vd Z<V- ,UW<dj -UW<j ZbjV<d Z-Vs< 4U,m <mU& ,4UDm ", +"U<cm ,4U5m <m&U5 U5<,Dm c5<Um 4U,Q <MmU& ,4Vm V<cm ,4pU U<p& pbV< c<Vp ,U=m", +" -m=U =bUDm cm=U =bU5m =b>Um ,U5=Dm c=>Um ,U=Q -U=Q Vm=b =QV- pb=U =U-p =bV", +"p V=cp 4U,W <m&UW ,4UHm c4W,U ,4U5W ,4UW8 4UH,5W c5WU< <MmbW 4bW<M& V4Z, Zc", +"4V< pb<UW pU<W& Vp<Zb cp<VZ vb=U =U-v =bvUH =Ucv =bvU5 -vU>= =U5vD, cv=>U v", +"b=M -vU=Q =bVv V-Z= p=bvU -pUv= Vv,p= c=yV <k <k! <kB a<k 1<k 8<k 1B<k a<8k", +" 6M< 6!<M T<k a<6M l< l<8 l<T ls< 6*k +<k *B<k a<+k <k1* +k1< <kB1* ak*68 6", +"M* +<6M Tk6* T<+k l<* l+< 6Tl* s6l* <kE <!kE H<k a<Hk 1E<k 8E<k Hk1< 8<Hk 6", +"E<M <kEM! 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Z4e 4aZe pG< G8p< pGZ< Z4se fv= =+fv fv=H fvg= v=f5 v>f= =H", +"fv5 g=fv> =Qf =+fQ Z=f Zfg= fp= p=f> fpZ= yf= ,<e <&e <e,B <&ae <e,. <&8e ,", +"<e.B <&e8a <e,K <Ke& ,<Te <&Te ,<ej e&<j <je,T <&se <e,* -<e *B<,e a<-e ,<e", +"*. 8<-e ,<e*B. -8a<e ,<e*K <e-K ,T<e* T<-e <je,* <j-e ,T<ej* -<se ,G< G<& G", +"<,H G<,a ,.G< G<,8 ,GH<. ,G8H< ,KG< GK<& G<,T T<G& G<,j <&Gj ,GT<j ,Gs< f<,", +" f-< ,Hf< f-g< ,<f. -8f< fH<,. f-8g< ,<fK fK-< ,Tf< f<-T ,jf< f<-j fT<,j f-", +"s< ,4e 4e& 4B,e 4e,a 4e,5 4e,8 ,45eB ,48ae ,K4e 4Ke& 4e,T Te4& 4e,j e&4j ,4", +"T5e ,4se =e, -=e ,e=B -a=e ,5=e -=>e =B5,e >e-=a ,e=K -e=K ,T=e =e-T ,j=e =", +"e-j =T5,e -=se ,4G 4&,G 4G,H 4G,a 4G,5 4G,8 ,4GH5 ,4GH8 ,K4G ,4G&K 4G,T ,4G", +"T& 4G,j <&j4G ,4GHj ,4sG f=, f-= fH=, f-g= =,f5 ->f= =Hf,5 g=f-> f,=K =Kf- ", +"=,fT f-=T =,fj f-=j =Hjf, f-s= <e,N <Ne& ,<eNB aeN<& ,<eN. <&e8N <eN,.B ,8<", +"aeN ,<Qe <&Qe ,QT<e ,Qa<e <je,Q <&jQe ,QT<je s<Qe& ,<e*N <e-N ,<e*BN -a<eN ", +"<e*,N. -8<eN ,<*BeN. aeN-8< ,Q<e* Q<-e Q<e,T* -QT<e ,Q<ej* -Q8<e QT,j<e* s-", +"Q<e G<,W W<G& ,GHW< ,GaW< ,GW<. ,G8W< G<H,W. 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De4T 4DeTa I<4j I<j48 De4j 4Dse =I =I+ =DI =aI =I5 =I> 5D=I =D>e =IK +I=K", +" =TI +T=I =Ij >I=j 5T=I s=I G<4I I<!4G J4< 4aJ< 5IG< 4G8I< J5< 48J< I<K4G 4", +"GKI<! 4TJ< J4Ta< I<j4G 4G8I<j 4eJj J4s< =If f+=I J= J=g f5=I =If> J=5 J>= f", +"I=K =If+K J=T =TgJ fj=I f>=Ij J=j s=J I<N <!IN DNI< aNI< <NI. IN8< I<ND. D8", +"<IN QI< Q!I< D<QI aIQ< IjQ< 8IQ< I<jQD QIs< <*IN +NI< I<*DN +D<IN I<*N. +I<", +"8N D<NI*. a*N8I< I<Q* QI+< QD<I* +QDI< I<jQ* I<j+Q QD<I*j sI<+Q WI< W!I< J<", +"W WaJ< W.I< 8IW< W<J. W8J< QIG< GQ<I! ZJ< ZaJ< I<Wj I<jW8 JjZ< ZJs< WIf< WI", +"+< fWJ< gWJ< fWI<. f8WI< JfW<. Jf8W< QIf< fQ+I< JfZ< ZJg< fQI<j fQ8I< ZJ<fj", +" sJ<Zf I<m <!Im Dm4e I<am Im5< I<8m I<m5D I<m5a QI4e I<mQ! QD4e I<mQa pI< 8", +"Ip< 4Dpe pIs< =Im +I=m De=m aI=m 5I=m >m=I =D5Im >eD=m =QI +Q=I QD=I Qa=I p", +"=I p>=I pD=I sp=I WI4e I<mW! J<m a<Jm WI5< I<mG8 5WJ< 8<Jm I<mGQ I<!4GQ J4Z", +"< ZJ4a< G<pI pG<8I Jp< s<Jp =Iv =+vI J=v Jvg= =5vI v>=I v=J5 v>J= fQ=I =Qf+", +"I Z=J gZJ= =Ifp fp>=I Jp= yJ= h< h<& hD< hc< h<. h8< D<h. c<h8 h<K <&hK hT<", +" c<hT hj< 8<hj D<hj hs< h<* h-< D<h* c<h- <*h. -8h< hD<*. c-8h< <*hK -<hK T", +"<h* h<-T <jh* h<-j hT<*j s<h- hG< G<h& hJ< cJ< G<h. G8h< h.J< J8c< G<hK hG<", +"&K J<hT cTJ< G<hj h8G<j J<hj s<hJ hf< h<f- J<hf i< f<h. h<f8 Jf<h. i8< f<hK", +" f-<hK h<fT iT< h<fj f-jh< Jfjh< is< h4 h4& h4D hc4 h45 h48 4Dh5 c4h5 h4K 4", +"&hK h4T c4hT h4j 48hj 4Dhj hs4 h= h=- h=D c=h h=5 h>= h5=D c=h> h=K =Kh- h=", +"T hc=T h=j =jh> h5=T hs= h4G 4Gh& hJ4 cJh4 4Gh5 4Gh8 J4h5 J4h8 4GhK h4G&K J", +"4hT cJ4hT 4Ghj h48Gj J4hj h4sJ h=f f-h= J=h i= f=h5 f>h= h5J= i>= =Khf h=f-", +"K hJ=T i=T hf=j h=jf> hJ=j is= h<N <&hN D<hN hNc< <Nh. 8<hN hD<N. c<8hN hQ<", +" Q<h& QDh< c<hQ Q<hj Q8h< hQD<j s<hQ <*hN -<hN hD<*N c-<hN h<*N. h-8<N D<*h", +"N. h-8c<N Q<h* h<-Q hQD<* c-Qh< hQ<*j h-Q8< QD<hj* hs-Q< hW< W<h& J<hW c<hW", +" W<h. W8h< J<Wh. cJ<W8 GQh< hWQ<& hZ< Z<hc W<hj hW8Q< Z<hj s<hZ fWh< h<-W J", +"fWh< iW< hfW<. hf8W< hfWJ<. W8i< h<fQ f-Qh< Z<hf iZ< hfQ<j fQ8h< hZf<j sZi<", +" h4m 4&hm 4Dhm c4hm 5<hm 48hm h45Dm c5<hm h4Q 4Qh& 4QhT c4hQ hp4 p<h8 pDh4 ", +"h4cp h=m -=hm hm=D hmc= =5hm >=hm h=5Dm c=h>m h=Q h-=Q hQ=D hc=Q hp= h=-p =", +"Dhp s=hp h4W 4Wh& J4hW c4hW 4Wh5 4Wh8 J5<hW cJ5W< 4GhQ h4WQ& hZ4 h4Zc pGh4 ", +"hp4G8 h4Jp sZh4 hv= -vh= J=hv iv= v=h5 v>h= J=hv5 v>i= =Qhv h=Q-v hZ= iZ= h", +"=fp fp-h= Z=hp yi= 6e 6e! 6eB 6ae 6e1 68e 6B1e 1a6e 6eK eK6! 6Te Te6a 6ej 8", +"e6j 1T6e s6e 6e* 6+e *B6e +e6a 1e6* 1+6e 6e1*B 6+e1a e*6K 6K+e Te6* +T6e ej", +"6* +e6j 6Te1* 6+se 6G< 6!G< 6He Ga6e 1G< G86e 1H6e Ga1< 6KG< 6G<!K GT6e 6GT", +"a< G<6j 6G8<j GT1< 6Gs< f6 f6+ f6H gf6 f61 f68 6Hf1 f6g1 f6K 6+fK f6T fTg6 ", +"f6j 6+fj 6Hfj sf6 4e6 6!4e 4B6e 6a4e 7e 7e8 7eB 7ae 4K6e 4e6!K 6T4e 4Te6a 7", +"ej 8e7j 7Te 7se =6e 6+=e 6e=B 6a=e 7=e >e7 =B7e 7a>e 6e=K =6+eK 6T=e =T6+e ", +"7e=j >j7e 7e=T >e7s 6G4e 4G6<! 6H4e 4Ga6e 7G< G87e 7He Ga7e 4G6<K 6GK4e! 4G", +"T6e 6GT4ae G<7j 7G8<j GT7e 7Gs< f=6 =+f6 f6=H f=g6 7f 7f> 7fH g7f =Kf6 f=6+", +"K f6=T g=f6T 7fj fj7> 7fT sf7 6eN eN6! eN6B 6Nae 6N1e 6N8e 6e1NB 68eaN 6Qe ", +"Q!6e Qe6T Qa6e 1Q6e Q86e 6Qe1T 6Qse e*6N 6N+e 6e*NB 6+eaN 6e1*N 6+e1N 1eN6*", +"B aeN68* Qe6* +Q6e 6QeT* 6+QTe 6Qe1* 6+Q1e 1Qe6T* s6e+Q 6We 6!We He6W Wa6e ", +"1W6e W86e 6He1W 6H8We GQ6e 6GQ<! 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He6m aem6G 7We W87e He7W Wa7e 4GQ6e <m!6GQ 4eZ6 Z4e6a ", +"pG7e 7pG8< 7Ze se7Z fv6 f+v6 fHv6 fvg6 7fv f>7v fv7H gf7v f6=Q =Qf6+ fvZ6 Z", +"f6g= 7fp 7pf> 7Zf y7f ?e ?e& ?Be ?ae ?1e ?:e 1e?B :e?a ?eK e&?K ?Te Te?a ?j", +"e :e?j 1T?e s?e ?e* ?-e *B?e -a?e 1e?* :e?- ?B1e* ?:-ae e*?K -e?K Te?* ?e-T", +" ej?* ?e-j ?T1e* ?-se ?G ?G& ?GH ?Ga ?G1 ?:G 1G?H :G?H ?GK G&?K ?GT GT?a ?G", +"j :G?j 1G?T s?G ?f ?f- ?fH g?f ?f1 :f? f1?H :fg? ?fK ?Kf- ?fT ?Tgf ?fj ?j:f", +" f1?T s?f ?4e 4e?& 4e?B 4a?e 7?e 7:e ?B7e 7e?a 4e?K ?4e&K 4T?e ?T4ae 7e?j 7", +"j:e 7e?T 7?se ?=e =e?- ?B=e =e?a 7e?= Ae ?=7eB Aae ?e=K ?-=eK =e?T ?-T=e =e", +"?j Aje ?T7=e Ase ?G4 4G?& 4G?H 4G?a ?G7 7:?G 7G?H 7G?a 4G?K ?G4&K 4G?T ?GT4", +"a 7G?j ?:G7j 7G?T ?G7s ?f= f-?= =H?f ?fg= 7f? Af ?H7f Agf =K?f ?f-=K =T?f ?", +"fTg= =j?f Afj ?T7f Asf ?eN e&?N eN?B ae?N 1e?N ?N:e ?B1eN ?:aeN ?Qe Qe?& Qe", +"?T Qa?e 1Q?e :e?Q ?Q1Te ?Qse e*?N -e?N ?Be*N ?-aeN ?1e*N ?:-eN 1e*?BN :-e?a", +"N Qe?* ?e-Q ?QTe* ?-QTe ?Q1e* ?:Q-e 1Qe?T* s?-Qe ?GW G&?W He?W Ga?W 1G?W :G", +"?W ?G1HW ?:GWa ?GQ GQ?& ?ZG Ze?a 1G?Q :G?Q Z1?G sG?Z ?fW f-?W fH?W ?Wgf f1?", +"W ?W:f ?f1HW g?:fW ?fQ f-?Q ?Zf ?fZ- f1?Q ?Q:f ?jZf ?Zsf ?me em?& em?B ae?m", +" 7e?m :e?m ?m7eB ?:mae 4Q?e ?Q4e& Te?m ?Qa4e ?pe 7e:p pe?T se?p =e?m ?e-m ?", +"=emB ?-mae ?=7em Aem 7=e?mB aeAm =e?Q ?-Q=e ?Tm=e ?-Tem pe?= Ape ?p=Te spAe", +" ?Gm Gm?& Gm?H Ga?m 7G?W :G?m ?G7Hm ?:GHm 4G?Q ?GQ4& Z4?G ?Z4Ga ?pG ?G:p ?G", +"7Z sG?p ?vf -v?f fv?H gf?v 7f?v Afv ?v7fH gfAv =Q?f ?fQ-v ?fZ= g?Zfv ?pf Ap", +"f 7f?Z yAf 6I< 6!I< 6De De6a 1I< 8I6e 1D6e D86e 6KI< I<K6! De6T 6DeTa I<6j ", +"I<j68 De6j 6Dse 6I* +I6e De6* +D6e 1I6* +I1< 6De1* 6+D1e 6KI* 6+I<K TI6* 6+", +"DTe I*6j I<j6+ I*j6D 6Is* G<6I I<!6G J6< 6aJ< G<1I 6G8I< J1< 68J< I<K6G 6GK", +"I<! 6TJ< J6Ta< I<j6G 6G8I<j 6eJj J6s< f6I 6+fI Jf6 Jfg6 6If1 68fI f6J1 J1g<", +" 6IfK f6+IK fTJ6 Jf6gT 6Ifj f68Ij f6Jj Jfs6 6I4e I<!46 6D4e 4De6a 7I< 8I7e ", +"7De D87e I<K46 6IK4e! 4De6T 6TI4ae I<7j 7I8<j De7T 7Dse =I6 6+=I 6D=I 6a=I ", +"=I7 7>=I 7D=I 7D>e 6I=K =I6+K 6T=I =TI6+ 7I=j 7>I=j 7T=I =I7s 4G6I< 4G6I<! ", +"4eJ6 J46a< G<7I 7G8I< 7J< J87e 4G6I<K 6!4GI<K J46T< 4TeJ6a 7GI<j I<j7G8 J<7", +"T s<7J f6=I =If6+ J=6 g6J= 7fI 7If> 7Jf J>7f =If6K f6+=IK J6=T J=g6T fj7I 7", +"f>Ij =T7J 7Jsf 6NI< I<N6! 6NDe 6DeaN 1NI< 68I<N 6De1N 6D8eN QI6e 6QI<! QD6e", +" 6QDae QI1< 6Q8I< 6QD1e sI<6Q 6NI* 6+I<N 6De*N 6+DeN 6I*1N 68I*N I<N1D* a*N", +"68I QI6* 6+QI< 6QDI* 6+QDe I*j6Q 6Q8I* 6QDI*j sI*6Q WI6e 6WI<! 6WJ< J6Wa< W", +"I1< 6W8I< 1WJ< J68W< 6GQI< I<!6GQ J6Z< ZJ6a< I<j6W 6W8I<j J1Z< sJ6Z< 6WfI f", +"6+WI JWf6 Jf6gW f61WI f68WI Jf61W Jf6W8 6QfI f6Q+I JfZ6 Zf6gJ f6Q1I f6Q8I Z", +"f6J1 sf6ZJ I<6m I<m6! De6m aem6D I<7m 7I8<m De7m 7De8m I<m6Q Im!6Qe I<m6T 6", +"QDaem pI7e 7pI8< pD7e 7sIp< 6I=m =I6+m =D6Im =aI6m =m7I 7>I=m 7De=m 7>Dem 6", +"Q=I =QI6+ =QD6I =Qa6I 7p=I p=I7> p=D7I s=I7p I<m6G I<!6Gm 6eJm J6ma< WI7e 7", +"WI8< J<7W 7JW8< 6GQI<m I<6mGQ! 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GLH< GLa< <LG. GL8< G<HL. G8<HL G<M G!<M ", +"H<GM a<GM <MGj 8<GM GT<Mj G<sM f<L +<fL H<fL f<gL <Lf. 8<fL fH<L. f8<gL fM<", +" +<fM H<fM fMg< <Mfj 8<fM fT<Mj fMs< 4eL eL4! eL4B 4Lae 4L5e 4L8e 4e5LB 48e", +"aL 4Me 4!Me Te4M aM4e 5M4e 8M4e 4Te5M 4Mse =eL +e=L eL=B ae=L 5e=L =e>L =B5", +"eL >e=aL =Me +M=e Te=M aM=e 5M=e =M>e =T5Me se=M 4LG< 4G<!L 4LHe 4Ga<L GL5<", +" 4G8<L 4He5L 4H8eL G<4M 4GM<! HM4e aMe4G 5<GM 4G8<M 4HM5e s4G<M f=L f+=L fH", +"=L =Lgf =Lf5 >Lf= =Hf5L g=f>L =Mf =+fM fT=M gf=M f5=M =Mf> =HMf5 =Msf eL<N ", +"<eL!N <eLNB aeL<N <eLN. 8<eLN eLN<.B 8<LaeN <MQe <MeQ! <MeQT aMeQ< <MeQj Q8", +"<Me Q<TMej s<QMe <e*LN +<eLN <eL*BN +<LaeN e*L<N. 8<L+eN NB*L<e. a<+e8LN <M", +"eQ* +Q<Me Q<TMe* +Q<aMe Q<Mej* Q8<+Me QMejT<* +Q<seM GLW< G<W!L G<HWL Ga<WL", +" G<WL. G8<WL W<LHe. aeLW8< W<GM GQ<M! G<ZM Z<GaM GQ<Mj GQ8<M Z<GMj sZ<GM W<", +"fL f+W<L fHW<L gfW<L fW<L. f8W<L H<WfL. g<Wf8L W<fM fQ+<M fMZ< Zfg<M fQ<Mj ", +"fQ8<M Zf<Mj sfZ<M 4Lem <mLe! <mLeB aem4L <mL5e 48emL 5<LemB aeL8<m Qe4M <Mm", +"e! <MmTe aMe4Q 4Mpe p<8Me p<TMe sp<Me em=L =+emL =BemL =aemL =5emL >e=mL em", +"L=B5 =am>eL Qe=M =Q+Me =QTMe =QaMe pe=M p=>Me p=TMe s=pMe 4LWe 4We!L 4HeWL ", +"4WaeL 4We5L 4W8eL <mLH5e aeL4W8 WM4e <MmG! 4MZe Z4eaM G<pM pG<8M Zp<GM Z4es", +"M =Lfv fv=+L =HfvL g=fvL fv=5L f>v=L fv5=HL f>vg=L fv=M =Qf+M =MZf g=MZf =M", +"fp fp>=M fpZ=M =Myf <e,L <Le& ,<eLB aeL<& ,<eL. <&e8L <eL,.B ,8<aeL ,<Me Me", +"<& <Me,T aMe<& <Me,j <M&8e ,T<Mej s<Me& ,<e*L <e-L ,<e*BL -a<eL <e*,L. -8<e", +"L ,<*BeL. aeL-8< <Me,* <M-e ,T<Me* -T<Me ,M<ej* -M8<e <M,jTe* s-<Me ,LG< GL", +"<& ,GH<L ,Ga<L ,G<L. ,G8<L G<L,H. <&LH8e G<,M <MG& ,GT<M <M> ,GM<j <M&G8 ", +"G<M,Hj sG<,M ,<fL -<fL fH<,L f-<gL f<,L. f-8<L ,H<fL. g-<f8L ,Mf< f<-M fT<,", +"M f-T<M fM<,j f-M8< ,HMfj< sf-<M ,L4e 4Le& ,4eLB ,4aeL ,45eL ,48eL 4eL,5B a", +"eL,48 4e,M Me4& ,4TMe aMe,4 ,4M5e <M&5e 4Te,5M s4e,M ,e=L -e=L =Be,L =a-eL ", +"=5e,L >e-=L ,5e=BL =a->eL ,M=e =e-M =TM,e =T-Me =M5,e >M-=e ,5T=Me s=-Me ,L", +"4G ,4G&L ,4GHL ,4GaL ,4G5L ,4G8L ,4LH5e <&LG5a 4G,M <M&4G ,4GHM Me&4H ,4G5M", +" <M&G5 4GT,5M s4G,M f,=L =Lf- =Hf,L g=f-L f=5,L f>-=L f5,=HL f>-g=L =,fM f-", +"=M =HMf, g=Mf- =Mf,5 f>M-= =H,f5M sf=-M ,<eLN <&eLN <eL,NB <&LaeN <eL,N. 8<", +"Le&N .B,L<eN a<8e,LN <Me,Q <M&Qe ,QT<Me Qa<Me& ,Q<Mej Q8<Me& QMej,T< <M&seQ", +" <e*,LN -<eLN NB*L,<e aeL-<N N.*L,<e 8<e-LN <e,.NB*L ae-L8<N ,Q<Me* -Q<Me Q", +"TM*,<e aMe-Q< QMej,<* Q8<-Me T*,M<jQe -Q<seM ,GW<L G<&WL G<H,WL aeLW<& G<L,", +"W. <&LW8e WL,.G<H WLa<,G8 ,GQ<M <M&GQ Z<G,M Z<&GM G<M,Wj GQ8<M& ,GMZ<j s<MZ", +"e& fW<,L f-W<L ,HWf<L gf<-WL ,W<fL. -W<f8L ,<fLHW. gWf8-<L fQ<,M f-Q<M Zf<,", +"M Z-f<M ,WMfj< f8<-WM fM<Z,j Z-<sfM <mL,e <m&eL ,4LemB aeL<m& ,45emL <mL5e&", +" 5L<m,eB a<8me&L <Mm,e <Mme& ,4TMem <M&aem p<M,e p<&Me ,4TpeM s<Mpe& =em,L ", +"-=emL emL=B, -me=aL emL=5, -=m>eL 5m=L,eB >m=a-eL =QM,e =Q-Me Mem=T, =Te-Mm", +" p=M,e -p=Me peT=M, s=M-pe ,4GWL <m&GL emL,4H aeL,4W <mL,G5 <mL,G8 ,L4GH5W ", +"4G,8amL <Mm,G <MmG& Z4e,M Z4eM& pG<,M pG<M& Z4MpG, s<MpG& fv=,L -vf=L fv,=H", +"L -vfg=L v=,f5L -v=f>L =,f5vHL >Lg=-vf =Qf,M -vMf= Z=f,M Z-=fM fp=,M fp-=M ", +"Z=Mfp, yf-=M U<I U!I< D<Ue aIU< U.I< 8IU< I<.UD U8<De I<M <!IM V<I aIV< I<U", +"j I<8M I<Vj V<sI I<U* +IU< I<*UD U+<De I<*U. 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J8WgU< UQf< fUQ+< Z<Vf VfZg< fUQ<j f", +"UQ8< VfZ<j sfVZ< Um4e I<mU! I<mUD aem4U I<mU5 I<mU8 5D<Uem 4U8aem UQ4e I<Mm", +"! 4QVe V4eQa 4Upe pU<8I pIV< Vp<sI Ue=m =U+Im =UDIm =UaIm =U5Im >eU=m U5e=D", +"m >Im=Ua UQ=I =UQ+I Ve=Q V=+QI pU=I p=U>e =IVp V>ep= UW4e 4UWe! U<Jm J<mUa ", +"4UW5e 4UW8e J5<UW J8<Um I<M4W I<!4WM V4Ze Z4Vae UGp< pUG8< J<Vp Jp<Vs fv=U ", +"=Ufv+ =UJv J=gvU =Ufv5 f>Uv= J=vU5 J>=vU fU=Q =Uf+Q VfZ= J=VgZ =Ufp fpU>= V", +"=Jp J=yV hU< U<h& U<hD hUc< U<h. U8h< hUD<. c<Uh8 hM< <Mh& Vh< c<Vh U<hj 8<", +"hM V<hj s<Vh U<h* h<-U hUD<* c-Uh< hU<*. -U8h< U<Dh*. hc8-U< <Mh* h<-M h<V*", +" V<h- hM<*j -Ujh< Vh<*j V-hs< UGh< G<U& hUJ< cUJ< hUG<. h8UG< J<Uh. cJ<U8 G", +"<hM hMG<& J<Vh VJc< hMG<j h8MG< VhJ<j sJ<Vh h<fU f<-U JfUh< iU< fU<h. f-U8<", +" hJ<fU. U8i< h<fM f-U<M V<hf iV< fUjh< f-U<j Vfh<j s<iV h4U 4Uh& 4UhD hUc4 ", +"4Uh5 4Uh8 h4U5D c5<hU h4M 4Mh& Vh4 c4Vh 4Uhj 48hM V4h5 s4Vh h=U h-=U hU=D h", +"c=U h5=U =Uh> h=U5D c=h>U h=M h-=M V=h h=V- h5=M >Mh= =jVh V=hs 4UhG h4UG& ", +"hUJ4 cJ4hU h4UG5 h48UG J5<hU cJ5U< 4GhM h4MG& J4Vh Vh4cJ h4MG5 h48GM Vh4J5 ", +"hs4VJ hf=U f-=U hJ=U i=U h=fU5 f>Uh= J=hU5 =Ui> hf=M h=Mf- h=Vf iV= h=Mf5 h", +">Mf= J=Vh5 s=iV U<hN hU<&N hUD<N c<UhN hU<N. h8U<N U<DhN. h8Uc<N UQh< hQU<&", +" V<hQ VhcQ< hQU<j hQ8U< VhQ<j hsVQ< hU<*N -U<hN U<Dh*N hc<-UN U<*hN. h8<-UN", +" UDhN<*. hUc<-8N hQU<* -UQh< VhQ<* V-hQ< UQ<hj* -U<hQ8 hQ<V*j hsQV-< UWh< h", +"WU<& J<UhW cJ<UW hWU<. hW8U< hWUJ<. cWUJ8< W<hM hWM<& Z<Vh Zc<Vh hWM<j hW8<", +"M hZV<j hZsV< fUWh< f-UW< hJWfU< UWi< hW<fU. fU<hW8 hUJ<fW. iUW8< fUQh< f-U", +"Q< VfZh< Z<iV fU<hWj fU<-Wj hZ<Vfj iZVs< 4Uhm h4Um& h4UDm c<mhU h4U5m h48Um", +" U5<hmD c4Uh8m 4UhQ h4QU& V4hQ Vh4cQ pUh4 hp4U8 h4Vp cp<Vh hm=U h=-Um h=UDm", +" c=hUm h=U5m h>=Um h5U=Dm h>Uc=m hQ=U h=Q-U =QVh c=VhQ =Uhp -pUh= V=hp cp=V", +"h 4UhW h4WU& J<mhU cJ<Um h4WU5 h4WU8 J4Uh5W c4Uh5W 4WhM h4WM& Z4Vh hZ4Vc hp", +"4UG pUG<& Jp<Vh cpJV< =Uhv -vUh= J=hvU =Uiv hv=U5 hv>=U hvUJ=5 iv>=U =Mhv h", +"vM-= V=hZ Z=iV fpUh= fp-=U Jp=Vh yVi= 6ek 6!ke 6Bke ak6e <k1e 8k6e <kB1e ak", +"e68 6Me 6!Me Tk6e aM6e l<e 68le 6Tle s6le ke6* +k6e <kBe* ake6+ ke*1< 6+e8k", +" 6e1k*B 68eak* Me6* +M6e 6Tek* aMe6+ 6el* 6+le l<Te* ls<+e G<k G!<k H<Gk a<", +"Gk Gk1< 8<Gk 6He1k 6H8ke G<6M 6GM<! 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RHk HkRa R1E RE8k R1H 1HR8 kMRE RkM!E HkRT RHTak lR", +"E R8lE lHR sRlH Rdk +kRd HkRd gRk R1d 1+Rd 1HRd gR1 RkdM dkMR+ TkRd RTgk ld", +"R R+ld RHld glR Rk2 k2R! k2RB R2ak R15 5kR8 RB5k 1aR5 kMR2 RkM!2 R2Tk ak2RT", +" lR5 R5l8 R5lT l5sR R;k +kR; RBk; akR; R1; >kR RB1; R1>a RkM; k;MR+ TkR; ak", +";RT l;R l>R RTl; sRl> kER2 RkE!2 R2Hk ak2RH RE5k R158E 1HR5 R1H5a RkME2 kME", +"R2! RHTk2 RHTak2 R5lE lR58E RHl5 lsRH5 dkR; dk;R+ HkR; R;gk 1dR5 R1>d 1HR; ", +"gR>k dkMR; R+dk;M RH;Tk gRTk; R5ld >Rld RHl; gRl> kP kP! kPB akP R1P 8kP RB", +"1P 1PRa Sk S!k STk Sak Sl Sl8 SlT Ssl kP( +kP P(kB ak+P R(1P 1PR+ kP(1B akP", +"1+ Sk( S+k TkS( +TSk Sl( l+S STl( l+Ss RWk R!Wk HkP WkRa R1W 1WR8 1HRW 1WRa", +" SWk WkS! SZk ZkSa lWS S8lW lZS lZSs dkP +kRW dkHP gkP 1WRd 1+RW dkP1H R1gP", +" Sdk +WSk ZkSd gSk ldS S+lW SZld glS Rmk R!km RBkm akRm R1m 1mR8 RB1m 1aRm ", +"Skm kmS! TkSm akSm Slp lpS8 lTSp Slsp k;P +kRm kB;P k;aP 1mR; >kP k;P1B ak>", +"P S;k +kS; TkS; akS; l;S S>l lTS; Ssl> WkRm km!RW HkRm akmRH 1WR5 R1W8m 1HR", +"m akPH5 WkSm S!Wkm SmZk SZakm SplW SlpW8 SplZ SZpls vRk R+vk RHvk vRgk vR1 ", +"vR>k R1vH gk>P Svk vkS+ ZkSv gkSv lvS S>lv lZSv ylS R9 R9& R9B R9a R91 :R 9", +"1RB :Ra R9M 9MR& R9T 9TRa lR9 l:R R9lT s:R R9( R9+ 9(RB 9+Ra 91R( :R+ R91(B", +" R+:a R(9M 9MR+ R(9T 9+RT R9l( :Rl+ lR9T( s+:R R9E REk& R9H 9HRa 91RE :RE 9", +"HR1 :RH RE9M k&ERM 9HRT R9HT& R9lE lE:R R9lH :RlH R9d 9+Rd 9HRd gR9 9dR1 :R", +"d R9H1d g:R 9MRd dk&RM 9TRd R9gM R9ld :Rld lHR9d gRl: R92 R2k& 92RB R29a R9", +"5 :R5 RB95 R5:a R29M k&2RM R29T R9T&2 R9l5 l5:R 95RT s5:R R9; 9+R; RB9; 9aR", +"; 95R; :>R R95;B :a>R 9MR; k;&RM 9TR; aM;R9 R9l; :Rl> l;R9T :>sR 9ER2 k&ER2", +" R29H R9H&2 RE95 R5:E 9HR5 RH:5 R9ME2 R9EM&2 R9HT2 aM2R9H lR95E :R5lE lHR95", +" :RHl5 9dR; dk&R; 9HR; R9g; 95Rd >R:d R9H1; :>gR R9dM; R9dM;& R9HT; gR9T; l", +"dR95 l>:Rd lH;R9 g:Rl> R9P kP& RB9P 9PRa 9PR1 :RP kPB91 Ra:P S9 S9& S9T S9a", +" Sl9 S: lTS9 S:s R(9P 9PR+ kP(9B akP9+ kP(91 R+:P 9P(R1B :R+aP S9( S9+ 9TS(", +" 9+Sa l(S9 S:+ Sl9T( S+s: R9W 9WR& 9HRW 9WRa 9WR1 :RW R9H1W RH:W S9W 9WS& S", +"Z9 Z9Sa S9lW S:W S9lZ S:Z 9WRd 9+RW dkP9H R9gP dkP91 R+:W 9HPR1d :RgP S9d 9", +"+Sd Z9Sd gS9 S9ld S:d SZ9ld gS: R9m 9mR& RB9m 9aRm 95Rm :Rm R95mB Ra:m S9m ", +"9mS& 9TSm 9aSm Sp9 S:p STp9 :pSs 9mR; 9+Rm k;P9B ak;9P k;P95 :R>P k;B95P :>", +"Ram S9; 9+S; 9TS; 9aS; S9l; S:> Sp9T; s:S> 9WRm km&RW 9HRm km&RH 95RW R5:W ", +"R9H1m RH:m 9WSm S9Wm& SmZ9 SZ9am SWp9 :WSp ZpS9 SZ:p vR9 R9v& R9vH vRg9 R9v", +"1 :vR vR91H gR:v Sv9 v9S+ ZvS9 g9Sv S9lv S:v Sv9lZ y:S RUk U!Rk RDk DkRa R1", +"U 1UR8 R1D 1URa UkRM RUkM! VRk RaVk lRU R8lU VlR VlsR UkR( RU+k R(Dk +kRD R", +"(1U 1UR+ R(1D 1+RD RUkM( R+UkM RkV( R+Vk RUl( R+lU VRl( lRV+ UkRE RUk!E HkR", +"D RHUak RE1U R1U8E 1URH R1HU8 RUkME U!kRME RHVk VRHak RUlE lRU8E VRlH lsVRH", +" RUdk R+Udk DkRd RDgk 1URd R1+Ud 1DRd R1gU dkMRU R+UdkM RdVk VRgk RdlU l+RU", +"d lRVd VlgR UkR2 RUk!2 R2Dk ak2RD 1UR5 R1U58 1DR5 R1D5a RUkM2 U!kRM2 RkV2 V", +"2Rak R5lU lRU58 lRV5 lsVR5 RUk; R+Uk; DkR; ak;RD 1UR; R1>U 1DR; R1>D k;MRU ", +"R+Uk;M R;Vk V+Rk; R;lU lR>U lRV; >RVl RUkE2 U!kRE2 RHUk2 RHUak2 R1U5E 1U5R8", +"E R1HU5 1UHR5a UkMRE2 !ER2UkM V2RHk ak2VRH lRU5E R5Ul8E VlRH5 Vs5lHR dk;RU ", +"R+Udk; RH;Dk gRUk; R1dU5 >kRUd R1HU; >kgRD RdUk;M dkR;U+M VdRk; gVRk; ldRU5", +" l>RUd lH;VR V>lgR UPk U!kP DkP akUP 1UP U81P 1PRD Ua1P SUk U!Sk SVk VaSk S", +"lU lUS8 SlV SVls U(kP +kUP D(kP Dk+P 1(UP U+1P R1DP( R1+DP UkS( U+Sk VkS( S", +"kV+ SUl( lUS+ l(SV SVl+ WkUP kP!UW HkUP akPUH 1URW R1WU8 1WRD R1WUa UWSk S!", +"UWk ZkSV SZVak SUlW SlUW8 SVlZ SlVsZ dkUP dkPU+ dkDP UPgk Ud1P dkPU8 dkP1D ", +"1UgP UdSk S+UWk SkVd SVgk lUSd S8dlU SVld SlgV kmUP km!UP DkRm akmRD 1URm R", +"1mU8 1DRm akPU5 UmSk S!Ukm SkVm SVakm pUSl SlpU8 SlVp SlVsp k;UP k;PU+ k;DP", +" ak;UP U;1P 1U>P k;P1D Dk>P U;Sk S+Ukm SkV; SV+km lUS; >USl SVl; SlV> RWUkm", +" RWUkm! RHmDk RWDakm R1WU5 1UWR8m R1HUm 1UHR8m SUWkm km!SUW SZVkm ZkVSam Sl", +"pUW lWpS8U SlVZp VplSsZ UPvk vRU+k RDvk gvRDk R1vU >kvUP R1vD >kgUP SUvk Sv", +"U+k vkSV VvgSk vUSl lv>SU SlVv SlyV tR tR& tRD tcR tR1 t:R R1tD :cR tRM R&t", +"M VtR VtcR ltR :Rlt lRVt uR tR( t+R RDt( cRt+ R1t( :Rt+ tR1D( :+cR RMt( R+t", +"M VRt( tRV+ tRl( lRt+ ltVR( uR+ tRE R&tE tHR cRtH R1tE tE:R R1tH :RtH RMtE ", +"tRM&E VRtH tcVRH tRlE t:RlE lRtH uRH tdR R+td RHtd gtR R1td :Rtd tHR1d t:gR", +" RdtM t+RdM tRVd VtgR lRtd t:dlR tdVlR ugR tR2 R&t2 RDt2 c2tR t5R :Rt5 R5tD", +" cRt5 RMt2 tRM&2 tRV2 tcVR2 lRt5 t:Rl5 tRV5 uR5 t;R R+t; RDt; cRt; R1t; t>R", +" t5RD; :Rc> R;tM t+RM; tRV; tc;VR lRt; >Rlt t5VR; u>R REt2 tR&E2 RHt2 tcRH2", +" R5tE t:R5E RHt5 t:HR5 tRME2 M&EtR2 tHVR2 cRVtH2 t5RlE lt5:RE tH5lR RHu5 Rd", +"t; t+Rd; RHt; t;gR R5td >Rtd tH5Rd gRt> tdRM; dM&t;R tH;VR gtVR; t5dlR t>lR", +"d tH;lR g>uR tP tP& tPD tcP tP1 t:P 1DtP :ctP St St& StV Sct Stl S:t SVlt u", +"S tP( t+P DPt( cPt+ 1Pt( :Pt+ tP1D( t:Pc+ St( St+ S(Vt tcS+ l(St l+St SlVt(", +" uS+ tWR RWt& tHP cRtW R1tW :RtW 1HtP :HtP StW tWS& tZS tZSc lWSt tWS: lZSt", +" uZS tdP R+tW HPtd gtP 1dtP :dtP tHP1d t:gP Std t+Sd SdtZ gtS ldSt t:Sd Std", +"lZ ugS tmR Rmt& RDtm cRtm t5P :Rtm 5DtP cR:m Stm tmS& tmSV tmSc tpS tpS: Vp", +"St upS t;P R+tm D;tP c;tP 1;tP t>P t5PD; tc>P St; t+S; t;SV S;tc l;St S>t S", +"t;Vp u>S RWtm tWRm& RHtm tcWRm R5tW t:WR5 H5tP t:HRm SWtm StWm& tmSZ ScZtm ", +"tWSp S:ptW SZtp SZup tvR vRt+ vRtH gRtv vRt5 >Ptv tvR1H >Pgt tvS S+tv StVv ", +"tvgS Stlv tvS: lvVSt yuS )O !)O )BO a)O )O. 8)O )O.B a)8O )OK )O!K T)O a)TO", +" jO) 8)jO T)jO s)O *O +*O *BO a*O *O. 8*O .B*O 8Oa* *OK *O+K T*O +OT* *jO j", +"O8* jOT* s*O E)O E)!O H)O a)HO )OE. E)8O )OH. 8)HO )OEK !E)OK T)HO HTa)O E)", +"jO jO8E) H)jO H)sO d*O d*+O H*O g*O *Od. d*8O *OH. 8*gO *OdK +d*OK HOT* T*g", +"O d*jO dj*+O jOH* gOs* )O2 )O!2 )O2B )Oa2 5)O 8)5O )B5O a)5O )O2K !)2OK )OT", +"2 Ta)O2 5)jO jO58) T)5O 5)sO ;*O ;*+O ;O*B ;*aO 5*O >*O 5O*B a*>O *O;K +;*O", +"K ;*TO a;*TO jO5* *j>O 5OT* >Os* )OE2 !)2EO )OH2 Ha)O2 E)5O 58E)O 5)HO H58)", +"O EK)O2 !)OEK2 HT)O2 Ta)HO2 jO5E) 58EjO) H5T)O sH5)O ;*dO +d;*O ;*HO ;*gO d", +"*5O d*>O HO5* g*>O dK;*O dK;+*O H;T*O gT;*O dj*5O >*djO H5*jO s*Og> P) P)! ", +"P)B aP) P). 8P) .BP) 8)aP QP) P)Q! TP) Q)aP Pj) Q)8P T)Pj sP) P* +P* P*B aP", +"* P*. 8P* P.*B aP8* Q*P Q*+P TP* T*+P P*j 8PQ* PjT* sP* WP) P)W! HP) H)aP P", +")W. W)8P P)H. H)8P QPW) Q!WP) ZP) aPZ) W)Pj Pj)W8 PjZ) ZPs) W*P W*+P HP* gP", +"* W.P* 8PW* H.P* 8Pg* dPQ* +WQP* Z*P Z*gP P*Wj dPj8* P*Zj s*gP mP) P!m) P)m", +"B mPa) 5P) 5)8P P)5B 5)aP mPQ) Q!mP) mPT) amPQ) pP) 8Pp) TPp) pPs) m*P m*+P", +" *B;P m*aP 5P* >P* *B5P aP>* ;PQ* m*P+Q m*TP am*TP p*P p*>P TPp* s*>P mPW) ", +"W!mP) mPH) amPH) WP5) 5W8P) H)5P H5P8) WQmP) WmPQ!) mPZ) ZamP) WPp) pW8P) p", +"PZ) sP)Zp vP* +Pv* HPv* vPg* 5Pv* vP>* 5PH* >*gP Q*vP v+QP* vPZ* ZvPg* vPp*", +" >Ppv* ZPp* y*P ,O ,&O ,OB ,aO ,O. ,8O .B,O 8a,O ,OK &O,K ,TO ,OT& ,jO ,O&j", +" jO,T s,O ,*O -O ,O*B -aO *O,. -8O *B,O. 8a-O *O,K -OK ,OT* -TO ,O*j -jO *j", +"O,T s-O ,EO &E,O ,HO ,OH& EO,. 8E,O HO,. ,OH8 EK,O ,&EOK HT,O ,HTaO jO,E &j", +"E,O ,OHj ,HsO ,dO -dO ,OH* g-O dO,. 8d-O ,HdO. -8gO dK,O dK-O ,OTd gO-T ,Od", +"j dj-O ,HjdO gOs- ,O2 &O,2 2B,O aO,2 ,5O ,O5& 5B,O ,O5a 2K,O ,&O2K TO,2 ,Ta", +"O2 jO,5 &jO,5 ,O5T ,5sO ,;O -;O ;O,B a;-O ,O5* ->O ,5;OB -a>O ;O,K ;O-K ,OT", +"; T;-O ,O;j >O-j ,5T;O >Os- EO,2 ,&EO2 HO,2 ,HaO2 5E,O ,58EO ,OH5 ,H58O ,EO", +"2K &EO,2K ,HTO2 H&O,T2 ,5jEO ,5E&jO ,H5jO s,H5O d;,O d;-O ,OH; -;gO ,O5d -d", +">O ,H5dO >Og- ,d;OK -d;OK ,H;TO -T;gO ,5djO ->djO ,H;jO s-g>O ,P ,P& ,PB ,a", +"P ,P. ,8P P.,B 8P,a ,QP Q&,P ,TP Qa,P ,Pj Q8,P TP,j sP, ,P* -P *B,P -Pa ,.P", +"* -P8 P*.,B 8P-a Q*,P -QP T*,P -TP P*,j -Pj P*j,T s-P ,WP W&,P ,HP HP,a WP,", +". 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T<n a<Tn <jn <j8n <jTn s<n n* +<n n*B an* n*. 8n* n.*B an8* n*K +Kn* Tn* ", +"T<+n n*j <j+n njT* sn* <nE <En! H<n a<Hn nE<. <n8E <nH. 8<Hn nE<K n!<EK T<H", +"n H<Tan <Enj <jn8E <jHn H<sn <dn <d+n Hn* g<n <.dn <d8n H.n* 8<gn dKn* <dn+", +"K TnH* T<gn dn<j <dj+n n*Hj s<gn 4<n n!4< <n4B 4<an 5<n 8<5n <n5B a<5n <n4K", +" 4<n!K 4<Tn 4Ta<n <j5n <jn48 T<5n 5<sn =n =+n =Bn =an =5n >n= 5n=B =a>n =nK", +" +n=K =Tn +T=n =jn =j>n 5T=n s=n <n4E 4<n!E 4<Hn 4Ha<n <n5E 48<nE 5<Hn 4H8<", +"n 4<nEK n!<4EK 4HT<n H<T4an <jn4E 48<njE 4Hj<n s<H5n =dn +n=d =Hn g=n 5d=n ", +"=d>n H5=n >ng= dn=K =+dnK Hn=T gn=T dn=j >n=dj Hn=j gns= <P <P! <PB a<P <P.", +" 8<P P.<B a<8P Q<P Q!<P T<P a<Qn <Pj 8<Qn <jTP s<P <P* +<P *B<P a<+P <.P* 8", +"<+P <P*.B aP*8< Qn* Q<+P TnQ* T<+P P*<j 8nQ* <PjT* +<sP W<P W!<P H<P a<HP W", +".<P 8<Wn H.<P 8<HP Q<Wn <P!WQ Z<P a<Zn <PWj <PjW8 <PZj Z<sP Wn* W<+P WnH* g", +"<P W.n* 8nW* H<Pd. 8<gP QnW* +W<Qn Zn* Z<gP dP<j <dj+P n*Zj s<gP o< o!< o<B", +" oa< o5< o8< 5<oB 5ao< oQ< Q<o! oT< Qao< op< p<o8 p<oT os< o= o=+ o=B =ao o", +"=5 o>= o5=B =ao> =Qo o+=Q =To o+=T p=o p=o> op=T s=o oW< W<o! oH< H<oa 5Wo<", +" W8o< H5o< H8o< W<oQ o!WQ< oZ< oaZ< oWp< opW8< opZ< s<oZ ov= v=o+ =Ho go= =", +"5ov v>o= =5oH o>g= ov=Q ov=+Q Z=o Z=go ovp= o>pv= p=oZ yo= ,n ,n& ,nB ,an ,", +"n. ,8n n.,B 8n,a ,nK ,K&n ,Tn T&,n ,nj 8n,j Tn,j sn, ,n* -n *B,n -na ,.n* -", +"n8 n*.,B 8n-a ,Kn* -nK T*,n -Tn n*,j -nj n*j,T s-n ,nE ,E&n ,Hn H&,n nE,. ,", +"E8n ,.Hn H8,n nE,K <&EnK Hn,T ,HnT& ,Enj <&jnE Hn,j ,Hsn ,dn -nd Hn,d g-n ,", +".dn 8d-n ,Hnd. g8-n ,Kdn dn-K Td,n -Tgn dn,j dn-j dnj,H gns- ,4n 4&,n 4B,n ", +"4a,n ,5n 48,n ,B5n 5a,n 4n,K <&K4n 4T,n ,4Tan 4j,n <&j5n 5T,n ,4sn =n, -=n ", +",n=B -n=a ,5=n >n- =B5,n -a>n ,n=K =K-n ,T=n -n=T ,n=j -n=j =T5,n >ns- 4n,E", +" <&E4n 4H,n ,4Han ,E5n ,48nE H5,n ,4H8n ,4nEK ,4E&nK ,4HTn 4H&,Tn ,4jnE <jE", +"5&n ,4Hnj sn,4H ,d=n =d-n ,H=n -=gn 5d,n -d>n =H5,n g->n =dn,K -=dnK =HT,n ", +"g=-Tn =jd,n >n-dj =Hj,n s-ng= ,P< <P& ,B<P a<,P ,.<P 8<,P <P.,B <P&8a ,Qn Q", +"&,n Qn,T Qa,n Qn,j Q8,n <Pj,T ,Qsn P*,n -P< <P*,B a<-P <P*,. 8<-P ,P.n*B -P", +"8a< Q*,n -Qn ,QnT* Qa-n <Pj,* Q8-n ,TPn*j -Qsn ,Wn W&,n H<,P Wa,n ,.Wn W8,n", +" ,HP<. <P&H8 Wn,Q <P&WQ Zn, ,aZn Wn,j <P&Wj ,nZj Zns, Wn,d -Wn ,HP<d -Wgn ,", +"Wnd. W8-n <d.,HP -Wng8 Qd,n Wn-Q ,dZn Z-n <dj,P Wn-j Zn*,j snZ- o, o&< o,B ", +"oa, o,5 o8, ,5oB ,5oa o,Q ,Qo& oT, ,Qoa op, p<o& p,oT os, o=, o- =Bo, o-a =", +"5o, o-> o=5,B ->oa o,=Q o-Q o,=T o-T o,p= o-p p=o,T os- o,W ,Wo& oH, ,Hoa ,", +"5oW ,Wo8 ,Ho5 ,Ho8 ,WoQ o&W,Q oZ, oaZ, oWp, op&,W opZ, s,oZ ov, o-v o,=H go", +"- o5v, -vo> ov,H5 g-o> oQv, -Qov ovZ, Z-o pvo, op-v oZ,p= yo- <nC <Cn! D<n ", +"a<Dn nC<. <n8C <nD. 8<Dn nC<K n!<CK T<Dn D<aTn <Cnj <jn8C <jDn D<sn n*C +Cn", +"* Dn* D<+n *Cn. 8Cn* D.n* 8nD* *CnK n*C+K TnD* an*DT nC*j n*j+C n*Dj Dns* n", +"C<E n!<CE D<Hn H<Dan <nCE. 8<nCE H<Dn. H8<Dn <nCEK <CEn!K H<DTn D<aHnT <jnC", +"E 8<CnjE H<jDn s<HDn <Cdn <dn+C DnH* D<gn <dnC. 8<dnC Hn*D. g<D8n <dnCK +<C", +"dnK Hn*DT g<TDn <djnC <dC+nj <djDn sn*gD <n4C 4<n!C 4<Dn 4Da<n <n5C 48<nC D", +"<5n 4D8<n 4<nCK n!<4CK 4DT<n D<a4Tn <jn4C 48<njC 4Dj<n s<D5n =nC +n=C =Dn +", +"D=n 5n=C =n>C 5D=n =D>n nC=K =+nCK Dn=T =D+Tn nj=C >n=jC Dn=j sn=D 4<nCE n!", +"<4CE 4HD<n H<D4an 5<nCE 8<C5nE H5<Dn 5D<H8n <nC4EK EK<!4nC H<D4Tn a<Hn4DT 5", +"<CnjE <j5n8CE 5D<Hnj H5<snD dn=C =+dnC Hn=D gn=D =5dnC >n=dC =H5Dn g=>Dn =d", +"nCK dnC=+K =HDTn g=DTn =jdnC =jd>nC =HjDn s=gDn <PC <!PC D<P a<DP PC<. 8C<P", +" D.<P 8<DP QC<P <PCQ! D<Qn QD<aP <CPj <Pj8C <PDj D<sP <CP* +C<P <PD* D<+P <", +"P*C. +<P8C D<P*. +D<8P QCn* +Q<PC DnQ* an*QD <Pj*C <Pj+C <PjD* s<P+D WC<P <", +"PCW! D<HP H<PDa <PCW. W8<PC H<PD. H8<DP <PCWQ Q<CWn! D<Zn Z<DaP <PjWC <jCW8", +"n Z<DPj s<PZD WCn* +W<PC DnW* D<gP Wn*C. W8n*C WDn*. g<PD8 Wn*QC <dC+Qn DnZ", +"* Zn*gD <djPC <dC+Pj Zn*Dj s<PgD o<C <Co! oD< D<oa 5<oC 8<oC 5Do< D8o< Q<oC", +" o!Q<C QDo< oDQa< oCp< op8<C p<oD oDs< o=C =Co+ =Do o+=D o5=C >Co= =5oD =Do", +"> oQ=C o=+QC oD=Q o+D=Q =Cop o>p=C op=D =Dos W<oC o!W<C H<oD oHDa< o5W<C o8", +"W<C oH5D< oH8D< oWQ<C W<Qo!C oDZ< oZDa< opW<C p<Wo8C Zp<oD osZD< =Cov ov=+C", +" ov=D =Dgo ov=5C o>v=C ovD=5 go>=D ov=QC =Qvo+C =DoZ goZ=D p=ovC p=vo>C p=D", +"oZ =Dyo ,nb <&bn ,Dn c<n ,.bn b8,n ,.Dn ,8cn ,Kbn <&Kbn bT,n ,Tcn bn,j <&jb", +"n Dn,j c<sn bn* -nb Dnb* c-n b.n* b8-n ,Dn*. c8-n bKn* bn-K Tnb* -Tcn n*bj ", +"bn-j n*j,D c-sn ,Ebn <&Ebn bH,n ,Hcn ,nbE. ,8nbE ,Hnb. c<H8n ,nbEK b<E&nK ,", +"HnbT c<HTn ,njbE <&Ebnj ,Hnbj sn,cH bd,n bd-n Hnb* c-gn ,dnb. -nb8d ,Ddn. c", +"-ng8 ,dnbK -nbdK ,DdTn c-ngT <djbn -njbd dnj,D s-ngc 4b,n ,4b&n 4D,n ,4cn b", +"5,n ,48bn 5D,n ,5cn ,4bnK ,4b&nK ,4DTn c4T,n ,4jbn 4b8,nj ,4Dnj sn,c4 =bn -", +"n=b ,D=n c=n b5=n =b>n =b5Dn >nc= bn=K =b-nK bT=n cn=T bn=j >n-bj =bT5n snc", +"= ,4bnE ,4b&nE ,4Hbn c4H,n ,5nbE <&Eb5n ,H5bn c5<Hn 4bE,nK <&bn4EK 4bH,Tn ,", +"4HcnT <jEb5n &n4jb<E 4bH,nj s<Hc5n bd=n =b-dn bH=n gnc= =b5dn >n-bd =bH5n c", +"=g>n =bdnK -nd=bK =bHTn c=gTn =bjdn >nd=bj =bHnj s=cgn b<P <&bP D<,P c<P b.", +"<P 8<bP ,DP<. 8<cP bQ,n <P&bQ QD,n ,Qcn <Pbj <P&bj <Pj,D c<sP <Pb* b<-P ,DP", +"n* -Pc< b<P*. -Pb8< P*.,Dn c-P8< Qnb* bQ-n ,QDn* -Qcn <Pjb* -Qnb8 ,QDn*j s-", +"Pc< bW,n <P&bW H<bP ,Wcn ,Wnb. ,W8bn ,WDn. cW<8P ,WnbQ W<&bQn ,DZn c<Zn <Pj", +"bW bW8<Pj Zb<Pj Zc<sP Wnb* bW-n ,WDdn c<gP bWn*. -Wnb8 <d.,DP c-W8n ,Qdbn -", +"WnbQ bnZ* c-Zn <djbP -Wnbj Zbn*j Z-nsc ob< b<o& oD, oc< ,5ob ,8ob ,5oD o8c<", +" ,Qob obQ<& ,QoD oTc< pbo, opb,8 pDo, s<oc =bo o-b ob=D oc- =5ob =bo> =bo5D", +" c>o- ob=Q -Qob ob=T =Qoc op=b ob-p p=boD ocs= ,Wob obW<& ,Hob oHc< ob5,W o", +"b8,W obH,5 ocH,5 obW,Q bW<o&Q obZ< Z<oc opb,W obWp<& oZbp< oscZ< ov=b ob-v ", +"ob=H c=go ovb=5 o-v>b ovD,5 cv=o> ovb=Q o-vbQ =boZ ocZ- p=bov o-pvb Z=bop o", +"cy- 6<n n!6< <n6B 6<an 1<n 8<1n <n1B a<1n <n6K 6!<nK 6<Tn 6Ta<n <j1n <jn68 ", +"T<1n 1<sn 6*n +n6* 6n*B an6* 1n* +<1n *B1n an1* 6Kn* n*K6+ Tn6* an*6T n*6j ", +"n*j6+ Tn1* 6*sn <n6E 6!<nE 6<Hn 6Ha<n <n1E 68<nE H<1n 6H8<n 6<nEK n!<6EK 6H", +"T<n H<T6an <jn6E 68<njE 6Hj<n s<H1n dn6* <dn6+ Hn6* 6*gn <d1n 68dn* Hn1* 1<", +"gn <dn6K 6+<dnK 6H*Tn g6Tn* <dj1n 68dn*j n*j6H sn*g6 6<4n 6!4<n 46<nB 4a6<n", +" 7<n 8<7n <n7B a<7n 46<nK 4<n6!K 4T6<n 6T<4an <j7n 78<nj T<7n 7<sn =6n 6+=n", +" 6n=B 6a=n 7=n 7=>n =n7B =n7a 6n=K =6+nK 6T=n =T6+n 7n=j 7>=nj =n7T 7=sn 46", +"<nE 4<n6!E 4H6<n 6H<4an <n7E 78<nE H<7n 7H8<n 6<n4EK 4<6!nEK 6H<4Tn a<Hn4T6", +" 7<njE <jn78E 7HT<n 7sH<n 6d=n =6+dn 6H=n =6gn =n7d 7>=dn =n7H 7=gn =6dnK d", +"nK=6+ =H6Tn g=6Tn 7=dnj >n=7dj 7Td=n g7s=n 6P< 6!<P 6B<P a<6P 1<P 8<6P 1B<P", +" a<1P Q<6P <P!6Q T<6P 6Qa<P Q<1P <Pj68 T<1P 6Ps< 6P* +<6P *B6P aP6* 1P6* +<", +"1P 6P*1B aP*68 Qn6* 6+Q<P TP6* aP*6Q Qn1* <Pj6+ P*j6T 6Ps* W<6P <P!6W H<6P ", +"6HPa< W<1P 6W8<P H<1P 6H8<P 6WQ<P 6WQ<P! 6PZ< Z6a<P <Pj6W 6W8<Pj 1<Zn s<PZ6", +" Wn6* 6+W<P HP6* 6Pg< Wn1* 6W8P* 6HP1* 1<gP 6W*Qn +Wn6Q* 6PZ* Z6*gP <dj6P 6", +"+W<Pj 1nZ* s<Pg6 o6< 6!o< 6<oB 6ao< 7o< 7<o8 o<7B 7<oa 6Qo< o!6Q< 6To< oT6a", +"< p<7o 7op8< 7<oT 7os< o=6 =6o+ o6=B =6oa 7o= 7=o> =B7o 7o=a o6=Q o=6+Q =6o", +"T o+T=6 7op= 7o=p> 7o=T 7os= 6Wo< o!6W< 6Ho< oH6a< oW7< 7oW8< 7<oH 7oH8< o6", +"WQ< 6WQo!< o6Z< oZ6a< 7opW< op87W< Z<7o osZ7< v6o= ov=6+ =6oH o=g6 ov7= 7o=", +"v> 7o=H 7og= ov=6Q =Qvo+6 o=Z6 goZ=6 7o=pv o>p7v= 7oZ= 7oy= ?n ?&n ?Bn ?an ", +"?1n ?:n 1n?B :n?a ?nK &n?K ?Tn T&?n ?jn :n?j 1T?n s?n ?n* ?-n n*?B -n?a 1n?", +"* :-n ?B1n* :a-n n*?K ?K-n Tn?* -n?T n*?j -n?j ?T1n* ?-sn ?nE &n?E ?Hn H&?n", +" 1n?E ?E:n 1H?n :n?H nE?K ?&nEK Hn?T ?HTan nj?E ?:njE Hn?j ?Hsn ?dn -n?d Hn", +"?d g?n 1d?n :n?d ?H1dn ?:gn dn?K ?-dnK Td?n ?Tgn dn?j ?:dnj ?Hjdn gns? ?4n ", +"4&?n 4n?B 4a?n 7?n :n7? ?n7B ?n7a 4n?K ?4&nK 4T?n ?T4an 7n?j ?:7nj ?n7T 7?s", +"n ?=n -n?= ?B=n =n?a =n7? An ?=7nB Aan ?n=K ?-=nK =n?T ?-T=n =n?j Ajn ?T7=n", +" Asn 4n?E ?4&nE 4H?n ?H4an 7n?E ?:7nE ?n7H ?:H7n ?4nEK &nE?4K ?H4Tn 4H&?Tn ", +"?j7nE 7:n?jE ?H7Tn s?7Hn =n?d ?-=dn =n?H ?=gn ?n7d Adn ?H7=n Agn ?=dnK -=n?", +"dK ?Td=n g?=Tn ?d7nj dnAj ?Hj=n gsAn ?P ?P& ?PB ?aP ?P1 ?:P 1P?B :P?a ?QP Q", +"&?P ?TP Qa?P ?Pj :Q?P 1T?P s?P ?P* ?-P P*?B -P?a 1P?* :-?P ?P1*B ?:P-a Qn?*", +" -Q?P TP?* -T?P P*?j -Q:n ?TP1* ?-sP ?WP W&?P ?HP HP?a 1W?P :W?P 1H?P :H?P ", +"Wn?Q ?WQP& ?ZP Z&?P Wn?j ?:WQn Z1?P sP?Z ?dP -W?P HP?d g?P 1d?P :d?P ?HP1d ", +"?:gP Qd?P ?-WQn Zn?d gP?Z dP?j ?:QdP ?Z1dP gPs? o? o?& o?B o?a o?7 o:? 7Bo?", +" ?ao: o?Q o&?Q o?T oT?a ?po o:?p 7o?T s?o o?= o-? =Bo? =ao? 7o?= Ao 7o=?B A", +"oa =Qo? ?Qo- =To? ?To- p=o? Aop o?Tp= Aos o?W o&?W o?H oH?a 7o?W ?Wo: 7o?H ", +"?Ho: oW?Q o?WQ& ?Zo ?aoZ op?W o:?pW o?7Z os?Z ?vo o-?v =Ho? go? o?7v Aov o?", +"H7v Aog ov?Q o-?vQ o?Z= ?Zgo op?v opAv ?Zo7v yAo <n6C 6!<nC 6<Dn 6Da<n <n1C", +" 68<nC D<1n 6D8<n 6<nCK n!<6CK 6DT<n D<a6Tn <jn6C 68<njC 6Dj<n s<D1n 6Cn* n", +"*C6+ Dn6* an*6D 1Cn* 68*nC Dn1* an*1D n*C6K 6+Cn*K 6D*Tn +Dn6T* n*j6C <jC1+", +"n n*j6D sn*6D 6<nCE n!<6CE 6HD<n H<D6an 1<nCE 8<C1nE 1H<Dn H8<1Dn <nC6EK EK", +"<!6nC H<D6Tn a<Hn6DT 1<CnjE <j1n8CE H<j1Dn 1H<snD <dn6C 6+<dnC 6H*Dn g6Dn* ", +"1<dnC <dC1+n 1HnD* g1<Dn 6dCn*K <d+n6CK Ddn6T* 6D*gnT <jC1dn <d6j+nC 6Ddn*j", +" s<Dg1n 46<nC 4<n6!C 4D6<n 6D<4an <n7C 78<nC D<7n 7D8<n 6<n4CK 4<6!nCK 6D<4", +"Tn a<Dn4T6 7<njC <jn78C 7DT<n 7sD<n 6n=C =6+nC 6D=n =D6+n 7n=C 7>=nC =n7D 7", +">D=n =6nCK 6+n=CK =D6Tn 6+D=Tn 7=njC >nj7=C =D7Tn s=7Dn 6<n4CE 4<6!nCE 6H<4", +"Dn a<Hn4D6 7<nCE 8<n7CE 7HD<n H8<7Dn 6<4nEKC 6n4CEK<! T<Hn4D6 46T<HDan <jn7", +"CE <j7n8CE H<j7Dn 7HDs<n =6dnC dnC=6+ =H6Dn g=6Dn 7=dnC >n=7dC 7Dd=n g7=Dn ", +"dnC=6K dn=C6+K 6Dd=Tn g6D=Tn =jn7dC >j7d=nC 7Hn=Dj s=Dg7n 6C<P <PC6! D<6P 6", +"DPa< 1C<P 68P<C D<1P 6D8<P <PC6Q 6QC<P! 6QD<P QD<6aP <Pj6C <PC6Q8 <Pj6D s<P", +"6D 6CP* 6+P<C DP6* aP*6D 6P*1C 68P*C 6DP1* 6D8P* 6Q*PC <PC6+Q 6QDP* 6QDaP* ", +"P*j6C <PC6+j P*j6D sP*6D <PC6W 6WC<P! 6HPD< WD<6aP 1W<PC <PC6W8 1H<DP H8<6D", +"P 6WQ<PC QC<P6W! Z6D<P 6DPZ<a <PC6Wj <PWj68C Z1<DP s<DZ1n 6W*PC <dC6+P 6HPD", +"* g6PD< 1Wn*C <dC68P 1WDn* g1<DP <PC6Qd 6C+WQn* Z6*DP Z6Dg<P <dC6Pj dP<j6+C", +" Z1nD* s<Dg6P 6<oC o!6<C 6Do< oD6a< o<7C 7o8<C 7<oD 7oD8< o6Q<C 6Q<o!C oD6Q", +"< 6QDoa< 7op<C o8<7pC 7oDp< os7D< o6=C o=6+C =6oD o+D=6 =C7o 7o=>C 7o=D o>D", +"7= o=6QC =Q6o+C =QDo6 o+6=QD 7o=pC p=7o>C p=D7o s=o7D o6W<C 6W<o!C oH6D< 6W", +"Doa< 7oW<C o8<7WC 7oHD< 7H<oD8 6WQo<C Q!oW6<C oZ6D< oD6Z<a op<7WC 78p<oWC 7", +"ZoD< 7ZDos< ov=6C v=6o+C ovD=6 go=6D 7o=vC o>=7vC 7vDo= go7=D =Q6ovC =6o+vQ", +"C Z=o6D Z=6goD p=o7vC >C7vp=o 7Z=oD yo7=D ?bn bn?& ?Dn ?cn b1?n ?b:n 1D?n :", +"n?c bn?K ?b&nK bT?n cn?T bn?j ?:bnj Dn?j sn?c bn?* ?b-n Dn?* cn?- 1nb* :b-n", +" ?D1n* c-:n ?bn*K ?-bnK ?DTn* ?-Tcn ?jbn* ?-jbn ?Djn* s-n?c bn?E ?b&nE bH?n", +" cn?H ?b1nE ?:bnE ?Hb1n ?:Hcn ?bnEK &nE?bK ?HbTn ?cHTn ?jbnE :nb?jE ?Hjbn s", +"?cHn bd?n ?-bdn Dd?n gn?c ?d1bn ?:dbn ?Dd1n g:n?c ?dbnK -nb?dK ?DdTn g?cTn ", +"?djbn ?db-nj ?Ddnj g?scn 4b?n ?4b&n 4D?n ?4cn ?n7b ?:7bn ?n7D cn7? ?4bnK &n", +"K?4b ?D4Tn ?c4Tn ?j7bn 7:b?jn ?D7Tn s?7cn ?b=n ?-=bn =n?D cn?= =n7b Abn ?D7", +"=n Acn ?=nbK =bn?-K =bT?n c=?Tn =b7nj bnAj ?Dj=n scAn ?4bnE &nE?4b ?H4bn ?c", +"4Hn 7?bnE 7bn?:E ?H7bn 7c?Hn 4bn?EK &n?E4bK 4bH?Tn c4H?Tn 7bn?jE 7j?E:nb ?H", +"n7bT 7cHs?n ?=dbn =b-?dn ?Dd=n c=?gn ?d7bn bdAn ?D7dn gcAn =bn?dK =d-n?bK ?", +"Hn=bT g?Tc=n ?dn=bj Adnbj ?Hn=bj Agnsc ?Pb bP?& ?DP ?cP b1?P ?b:P 1D?P :c?P", +" bQ?P ?QbP& bT?P cQ?P bP?j ?:QbP DP?j sP?c bP?* ?b-P DP?* c-?P ?Pb1* ?:P-b ", +"?DP1* ?cP:- ?QbP* ?-QbP ?QDP* ?cQ-P ?Pjb* ?-Pbj ?DP*j s?Pc- bW?P ?WbP& bH?P", +" cW?P ?Wb1P ?:WbP ?HPb1 ?cW:P ?WbQn bWn?Q& Zb?P ?PZc ?WjbP ?Wb:Qn ?Zb1P s?Z", +"cP bd?P ?-WbP Dd?P gP?c ?dPb1 ?:dbP ?Dd1P g?P:c ?QdbP ?Wb-Qn ?ZbdP g?ZcP ?d", +"Pbj ?Wb-Pj ?DdPj g?scP o?b ?bo& o?D oc? 7bo? ob?: 7o?D ?co: ob?Q o?bQ& ob?T", +" ?Qoc ob?p o:?pb op?D ocs? =bo? ob?- =Do? ?co- 7o=b Aob o?D7= Aoc o?=bQ o-?", +"bQ o?D=Q oc?=Q p=bo? opAb ?pDo= osAc ob?W o?bW& ob?H ?Hoc ?W7ob o:?bW o?H7b", +" o:H?c o?bWQ obW?Q& ?DoZ oc?Z ?pobW ?pbo:W ?Zo7b s?oZc ob?v o-?vb ov?D ocg?", +" 7vbo? ovAb ?vD7o goAc ?vobQ ?vbo-Q ?Zo=b go?Zc ?pvob Aopvb ?pvoD yoAc R< R", +"<! R<B Ra< R<. R8< <.RB 8<Ra R<M R!<M RT< T<Ra R<j 8<Rj T<Rj sR< R<* R+< *B", +"R< +<Ra R.n* +<R8 n*.RB an*R8 Mn* +MR< T<R* +TR< <jR* +<Rj Mn*Tj R+s< R<E <", +"ER! RH< H<Ra <ER. RE8< R.H< H8R< RE<M <MER! H<RT aMnH< RE<j R8<ME H<Rj RHs<", +" R<d +<Rd H<Rd gR< R.<d 8<Rd RH<d. R8g< <MRd <dMR+ T<Rd RTg< <dRj <dMR8 <dj", +"RH sRg< R4< 4!R< 4<RB 4aR< R5< 48R< RB5< 5aR< 4MR< <M!R4 4TR< aMn4< 4jR< R4", +"8<M 5TR< R4s< =R =R+ =RB =Ra =R5 =R> R5=B >R=a =RM R+=M =RT R+=T =Rj =R>M R", +"5=T s=R 4<RE R4<!E 4HR< R4Ha< RE5< R48<E H5R< R4H8< <MER4 R4E<M! R4HT< 4HMR", +"a< R4j<E <MER48 R4H<j sR4H< =Rd R+=d =RH g=R R5=d =d>R RH=5 g>=R Rd=M =R+dM", +" RH=T gR=T Rd=j >M=Rd RH=j gs=R R<P R!<P RB<P aPR< R.<P 8PR< <P.RB R8<aP S<", +" S<! S<T Sa< S<j S8< T<Sj Ss< <PR* +PR< <P*RB aP*R< <P*R. R+<8P R<.P*B R8<a", +"P* S<* S+< T<S* +TS< <jS* +<S8 S<T*j S+s< RW< R!W< H<RW WaR< R.W< W8R< RH<W", +". RH8W< S<W W<S! SZ< Z<Sa W<Sj W8S< SjZ< s<SZ W<Rd +WR< RH<W* RWg< RW<d. R+", +"W8< <P.RH* gR<W8 S<d +WS< Z<Sd gS< <dSj 8<Sd SZ<dj g<Ss oR< R<o! R<oB Rao< ", +"R5o< R8o< oR5<B o8Ra< So< o!S< oTS< oaS< Sp< o8S< STp< s<So =Ro o+=R oR=B o", +"a=R oR=5 =Ro> o=5RB o>=Ra S= S=+ S=T S=a S=p S>= Sp=T s=S RWo< o!RW< RHo< o", +"HRa< 5WR< o8RW< oHR5< oH8R< oWS< S<Wo! S<oZ SZ<oa SWp< Sp<W8 ZpS< osZS< =Rv", +" =+vR oH=R =Rgo =5vR v>=R =RvH5 g=Ro> S=v v=S+ S=Z gS= p=Sv v>S= SZp= y=S ,", +"R< R<& RB,n Ra,n ,.R< R8,n ,R<.B ,R8a< ,Mn <MR& RT,n T<R& R<,j 8M,n ,RT<j ,", +"Rs< R*,n -R< n*B,R Ra-n n*.,R R8-n ,R.n*B -R8a< M*,n -Mn Mn*,T RT-n Mn*,j R", +"<-j ,RTn*j -Rs< ,ER< RE<& RH,n H<R& ,R<E. ,R8<E ,RH<. ,RH8< ,EMn <M&RE HM,n", +" aMn,H ,Rj<E <&jRE ,RH<j sn,RH R<,d R<-d ,RH<d -Rg< ,Rd<. -R8<d <d.,RH g-R8", +"< dM,n dM-n dMn,H -Mgn <dj,R -Rj<d ,RH<dj s-Rg< ,R4 R&,4 RB,4 R4,a R4,5 R4,", +"8 ,R45B ,R45a R4,M <M&R4 R4,T aMn,4 R4,j <M&R5 ,R45T ,Rs4 =R, =R- ,R=B -R=a", +" ,R=5 ->=R =R5,B >n-Ra ,R=M -R=M ,R=T -R=T ,R=j -R=j =RT,5 =Rs- ,ER4 ,R4&E ", +"R4,H ,R4H& ,R45E ,R48E ,R4H5 ,R4H8 ,R4ME <MER4& ,R4HM ,4HaMn ,R4jE <MER5& ,", +"R4Hj sR4,H ,R=d =d-R ,R=H g-=R =R5,d >n-Rd =RH,5 g=R-> =Rd,M =R-dM =RH,T g=", +"R-T =Rj,d >M-dn =RH,j s=Rg- R<,P <PR& <PB,R <P&Ra <P.,R <P&R8 ,R.<PB R8<,aP", +" S<, S<& ,TS< ,aS< ,nSj ,8S< S<T,j S<s, <P*,R R<-P ,R<P*B -Ra<P ,R<P*. -R8<", +"P <PR*,.B R8<-Pa ,nS* S-< S<T,* -TS< S<*,j -nS8 n*jS,T s<S- RW,n W<R& ,RHW<", +" <P&RH ,RW<. ,RW8< <P.,RH RH8<P& ,WS< W<S& Z<S, Z<S& S<W,j S8<,W SZ<,j Ss<Z", +"& ,RW<d RW-n RH<,dP -RWg< <d.,RW -RW8< ,.RHWn* -R8g<P ,dS< -WS< SZ<,d g<S- ", +"S<d,j S-W8< SdjZn, gS-s< o,R ,Ro& ,RoB ,Roa ,Ro5 ,Ro8 o,R5B o8,Ra So, o&S< ", +"oTS, oaS, opS, o8S, Sp<,T s,So o,=R o-R o=,RB -Roa o=5,R -Ro> o,5=RB o->Ra ", +"S=, S-o S,=T =TS- S,p= o-S> S=p,T S-s= ,RoW o&R,W ,RoH oH&,R o,R5W o8,RW oH", +",R5 oH8,R SWo, S<&oW S,oZ oZ&S< Sp<,W Sp<W& oZ,Sp os,SZ vRo, =R-v ov,RH gRo", +"- ov,R5 o-v>R =R5oH, go->R ovS, Svo- S,Z= S-go Sv,p= o-pSv S=Zp, S-yo R<U R", +"!U< RD< UaR< R.U< U8R< R.D< D8R< <MUn <M!Un V<R RaV< U<Rj R8<Uj R<Vj V<sR U", +"n* U+R< D<R* +DR< U.n* 8nU* RD<*. an*U8 MnU* Mn*U+ Vn* R+V< n*Uj Mn*U8 n*Vj", +" Vns* REU< R<U!E UHR< RH<Ua R<UE. R8<UE RH<U. RH8U< <MEUn U<EMn! RHV< V<RHa", +" R<jUE <MEU8n V<RHj s<VRH U<Rd R+<Ud HnU* RDg< R<dU. R8<Ud RD<d. gR<U8 <dMU", +"n U+<dMn R<Vd V<gR <djUn U+<dnj V<dRj gV<sR 4UR< R4U<! 4DR< R4Da< U5R< R48U", +"< 5DR< R4D8< R4U<M R4U<M! R4V< V4Ra< R4jU< 4U8R<j R5V< s<VR4 =RU R+=U =RD R", +"+=D R5=U =U>n R5=D >R=D Un=M =RU+M V=R V+=R Rj=U >M=Un V5=R >nV= R4U<E 4UER", +"<! R4HU< 4UHRa< R5<UE R4EU8< RH5U< 4UHR8< R4U<ME <MUn4E! V4RH< R4HV<a <MEU5", +"n RE48U<j V5<RH s<HV5n Rd=U =RU+d RH=U gR=U =RU5d >nU=d =RHU5 g=R>U =RUdM d", +"Mn=U+ Vd=R =RgV =RjUd >nd=Uj V=RH5 V>ng= U<P U!<P D<UP a<UP U.<P 8<UP RD<P.", +" RD8<P S<U U<S! SV< V<Sa U<Sj U8S< SjV< SVs< <PU* +<UP RD<P* aP*U< U<P*. U+", +"<8P <P.RD* U8<aP* U<S* U+S< V<S* V+S< S<U*j S+<U8 SV<*j Ss<V+ UWR< RW<U! H<", +"UP RWDa< RW<U. RW8U< RWD<. RWD8< UWS< S<UW! Z<SV SZ<Va S<UWj S8<UW SZ<Vj Ss", +"<VZ WnU* R+WU< RWD<d U<gP UWn*. UW8n* <d.RWD gU<8P U<Sd S+<UW V<Sd SVg< S<d", +"Uj S8<Ud SV<dj gS<Vs oU< U<o! RDo< Uao< U5o< U8o< oU5D< oU8D< oUS< S<Uo! oV", +"< V<oa pUS< Sp<U8 S<Vp s<oV =Uo o+=U oU=D oU=a =5oU =Uo> =RDo5 o>U=D S=U S+", +"=U S=V =aoV Sp=U =US> VpS= oVs= UWo< oUW<! UHo< oUHa< oU5W< oU8W< oUH5< oUH", +"8< S<UoW oUWS<! Z<oV oVZa< Sp<UW S8WpU< oVZp< oVsZ< ov=U ovU=+ oU=H =Ugo ov", +"U=5 o>Uv= =Rv5D goU>= =USv S=vU+ oVZ= V=go p=USv S>=vU oVvp= S=yV ,Un b<R& ", +"RD,n cR< ,.Un b8R< ,RD<. R8c< bM,n <M&Rb Vn, V<cR b<Rj <&jRb ,nVj cRs< b<R*", +" -Un ,RDn* -Rc< ,Un*. U8-n n*.,RD c-R8< Mnb* bM-n ,nV* V-n Mn*bj Un-j Vn*,j", +" snV- ,EUn ,Un&E bHR< RHc< ,UnE. ,U8nE ,UHn. cR<H8 ,UnME <MEU&n ,HVn cR<VH ", +",UnjE <MERb8 Vn,Hj snV,H b<Rd Ud-n ,RD<d cRg< ,Udn. -Un8d <d.,RD cR<g8 <dMR", +"b -UndM ,dVn gnV- <djRb -Undj Vdn,j V-ngs R4,U ,R4U& R4,D ,Rc4 b5R< ,R4b8 ,", +"R45D R5c< ,R4bM ,4UM&n ,RV4 cR4V< ,R4bj ,4U&nj ,5Vn snV,4 =Rb -R=b ,R=D c=R", +" Rb=5 -U>n =Rb5D =Rc> Rb=M =R-bM Vn=b =RV- Rb=j >M-bn V=R,5 >nV- ,R4bE <&ER", +"4b ,R4bH cR4,H ,U5nE <&ERb5 ,UH5n cR5H< <MER4b <MR&4bE V4,RH cRHV4, <MERb5 ", +"R4,jb8E V5n,H s<HcR4 Rb=d =R-bd Rb=H gc=R =Rb5d >n-Ud =RbH5 c=Rg> =RbdM =bd", +"-Mn V=R,H c=VgR =Rbdj >Md=Rb =RbHj c=Rgs bPR< <PU& ,RD<P R<cP ,UP<. <P&U8 <", +"P.,RD cR<8P Sb< b<S& V<Sb Sc< b<Sj b8S< SV<,j s<Sc ,UPn* U<-P b<PRD* c-R<P ", +"<P.Rb* -UP8< <Pb*RD. c<8-UP b<S* -US< SV<b* S<V- Sb<*j S-b8< SbjVn* V-nSs b", +"WR< <P&UW ,RWD< RWc< ,UWn. ,UW8n <P.,UH cRW8< bWS< Sb<W& ZbS< S<Zc Sb<Wj Sb", +"8W< SZb<j Sc<sZ ,UWdn UW-n RWD,dn c-RW< <d.,UP -UW8n RW,D<d. cR8-Wn b<Sd S-", +"bW< SZb<d g<Sc Sb<dj Sb8<d SbjZn* V-nsZ oU, ,Uo& ,RoD oUc< ,Uo5 ,Uo8 oU,5D ", +"ocR,5 obS< Sb<o& oV, S<oc pbS< Spb8< o,Vp s,oV ob=R o-U =RboD =Roc =Rbo5 ->", +"oU ob5=RD oc->R S=b =bS- =boV Sc= Sp=b =bS> oV,p= Scs= ,UoW oU&,W ,UoH ocR,", +"H oU,5W oU8,W oUH,5 cR5W< Sb<oW S<WoU& Z,oV oV,Zc SpbW< SbWo8, oV,Zp oVsZ, ", +"vR=b oU-v ovU,H =Rcv ovU,5 o-Uv> ob5=RH cv=>R =bSv o-USv SZ=b Z=Sc S=bpv o-", +"pvU oVvp, Scy= q< q!< q<B qa< q1< q8< 1<qB 1aq< q<M <Mq! qT< T<qa l<q q8l< ", +"qTl< sq< q* q+< q*B qa* q*1 q8* 1*qB 1aq* q*M +<qM qT* +Tq* l*q q+l< qTl* s", +"q* q<E <Eq! qH< H<qa 1<qE 8<qE 1Hq< H8q< <MqE q!<ME H<qT qHTa< q<lE l<q8E q", +"Hl< qHs< qd< +<qd qH* gq< 1<qd 8<qd 1Hq* q8g< <dqM q+<dM HMq* qTg< qdl< l+q", +"<d qHl* l<gq q4< 4<q! 4<qB 4aq< 7q< 7<q8 q<7B 7<qa 4Mq< q!4<M 4Tq< qT4a< 7q", +"l< 7lq8< 7<qT 7qs< q= q=+ q=B q=a q=7 q>= =B7q =aq> q=M q+=M q=T q+=T l=q q", +">l= 7q=T sq= 4<qE q!4<E 4Hq< qH4a< q<7E 7q8<E 7<qH 7qH8< q4<ME <MEq!4 qH4T<", +" 4HMqa< 7lq<E l<87qE 7qHl< sq7H< q=d =+qd q=H gq= 7dq= >=qd 7q=H g=q> qd=M ", +"q=+dM qH=T =Tgq ldq= q>l=d lHq= l=gq q<P <Pq! <PqB a<qP 1<qP 8<qP q1<PB q8a", +"<P Sq< q!S< qTS< qaS< l<S S8l< lTS< l<Ss q*P +<qP P*qB aPq* 1Pq* 8Pq* q*1PB", +" q8*aP Sq* q+S< qTS* qaS* Sql* S+l< Sq*lT s*Sq qW< W<q! H<qW Waq< 1Wq< W8q<", +" qH1W< qH8W< qWS< SqW<! Zq< qaZ< S<lW Sq8W< l<Zq s<Zq qW* +Wq* HPq* qWg< 1W", +"q* W8q* qH*1W gq1W< qWS* Sq+W< Zq* g<Zq S<ld Sq8W* l*Zq l<gS oq< o<q! q<oB ", +"o<qa 7<oq o<q8 7oq<B 7oaq< oqS< Sq<o! o<qT Sqao< r< r8< rT< rs< q=o o+q= =B", +"oq oq=a 7oq= q=o> 7o=qB q>o=a S=q S+q= Sq=T Sq=a r= r>= r=T rs= o<qW oqW<! 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+ +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Prepares the data for MSOPs of 4-variable functions.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ReadMsops( char ** ppSopSizes, char *** ppSops ) +{ + unsigned uMasks[4][2] = { + { 0x5555, 0xAAAA }, + { 0x3333, 0xCCCC }, + { 0x0F0F, 0xF0F0 }, + { 0x00FF, 0xFF00 } + }; + char Map[256], * pPrev, * pMemory; + char * pSopSizes, ** pSops; + int i, k, b, Size; + + // map chars into their numbers + for ( i = 0; i < 256; i++ ) + Map[i] = -1; + for ( i = 0; i < 81; i++ ) + Map[(int)s_Data3[i]] = i; + + // count the number of strings + for ( Size = 0; s_Data4[Size] && Size < 100000; Size++ ); + assert( Size < 100000 ); + + // allocate memory + pMemory = ALLOC( char, Size * 75 ); + // copy the array into memory + for ( i = 0; i < Size; i++ ) + for ( k = 0; k < 75; k++ ) + if ( s_Data4[i][k] == ' ' ) + pMemory[i*75+k] = -1; + else + pMemory[i*75+k] = Map[(int)s_Data4[i][k]]; + + // set pointers and compute SOP sizes + pSopSizes = ALLOC( char, 65536 ); + pSops = ALLOC( char *, 65536 ); + pSopSizes[0] = 0; + pSops[0] = NULL; + pPrev = pMemory; + for ( k = 0, i = 1; i < 65536; k++ ) + if ( pMemory[k] == -1 ) + { + pSopSizes[i] = pMemory + k - pPrev; + pSops[i++] = pPrev; + pPrev = pMemory + k + 1; + } + *ppSopSizes = pSopSizes; + *ppSops = pSops; + + // verify the results - derive truth table from SOP + for ( i = 1; i < 65536; i++ ) + { + int uTruth = 0, uCube, Lit; + for ( k = 0; k < pSopSizes[i]; k++ ) + { + uCube = 0xFFFF; + Lit = pSops[i][k]; + for ( b = 3; b >= 0; b-- ) + { + if ( Lit % 3 == 0 ) + uCube &= uMasks[b][0]; + else if ( Lit % 3 == 1 ) + uCube &= uMasks[b][1]; + Lit = Lit / 3; + } + uTruth |= uCube; + } + assert( uTruth == i ); + } +} + +#if 0 + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManDeriveCnfTest() +{ + int i, k, Lit; + printf( "\n" ); + for ( i = 80; i >= 0; i-- ) + { + Lit = i; + for ( k = 0; k < 4; k++ ) + { + if ( Lit % 3 == 0 ) + printf( "%c", 'A' + k ); + else if ( Lit % 3 == 1 ) + printf( "%c", 'a' + k ); + Lit = Lit / 3; + } + printf( "\n" ); + } +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManDeriveCnfTest2() +{ + char s_Data3[81] = "!#&()*+,-.0123456789:;<=>?ABCDEFGHIJKLMNOPQRSTUVWXYZ[]abcdefghijklmnopqrstuvwxyz|"; + + unsigned uMasks[4][2] = { + { 0x5555, 0xAAAA }, + { 0x3333, 0xCCCC }, + { 0x0F0F, 0xF0F0 }, + { 0x00FF, 0xFF00 } + }; + char Buffer[100], * pCur; + FILE * pFile; + int CountCur, Counter = 0, nLines = 0; + int pLines[1<<16] = {0}; + int pNums[1<<16] = {0}; + unsigned uTruth, uTruth2, uCube, cCube; + char * pSops[1<<16] = {0}; + char Sop[10]; + char Cube[4]; + int i, k; + + pFile = fopen( "cands2.txt", "r" ); + while ( fgets( Buffer, 100, pFile ) ) + { + if ( Buffer[0] == '0' ) + Extra_ReadHexadecimal( &uTruth2, Buffer+2, 4 ); + else + uTruth2 = 0xFFFFFF; + + // skip all chars till a-d or A-D + if ( Buffer[0] == '0' ) + for ( pCur = Buffer; *pCur != '\n'; pCur++ ) + { +// if ( *pCur >= 'a' && *pCur <= 'd' || *pCur >= 'A' && *pCur <= 'D' ) + if ( *pCur == ':' ) + { + pCur++; + break; + } + } + else + pCur = Buffer; + + + uTruth = 0; + CountCur = 0; + uCube = 0xFFFF; + for ( i = 0; i < 4; i++ ) + Cube[i] = 2; + + for ( ; *pCur; pCur++ ) + { + if ( *pCur == '+' || *pCur == '\n' ) + { + uTruth |= uCube; + uCube = 0xFFFF; + + // get the cube + cCube = 0; + for ( i = 0; i < 4; i++ ) + cCube = 3 * cCube + Cube[i]; + for ( i = 0; i < 4; i++ ) + Cube[i] = 2; + + assert( cCube >= 0 && cCube < 81 ); + Sop[CountCur] = cCube; + CountCur++; + if ( *pCur == '\n' ) + { + Sop[CountCur] = 0; + break; + } + } + else if ( *pCur >= 'a' && *pCur <= 'd' ) + { + uCube &= uMasks[*pCur-'a'][1]; + Cube[*pCur-'a'] = 1; + } + else if ( *pCur >= 'A' && *pCur <= 'D' ) + { + uCube &= uMasks[*pCur-'A'][0]; + Cube[*pCur-'A'] = 0; + } + } + assert( *pCur == '\n' ); + assert( uTruth2 == 0xFFFFFF || uTruth2 == uTruth ); + + Counter += CountCur; + pNums[uTruth] = CountCur; + pSops[uTruth] = ALLOC( char, CountCur ); + memcpy( pSops[uTruth], Sop, CountCur ); + pLines[nLines++] = Counter; + } + fclose( pFile ); + + printf( "Lines = %d. Counter = %d.\n", nLines, Counter ); + +/* + // write the number of cubes + for ( i = 0; i < 65536; i++ ) + printf( "%d,%d ", pNums[i], pNums[i] + pNums[0xffff & ~i] ); + printf( "\n" ); +*/ + + // write the number of cubes + Counter = 0; + for ( i = 1; i < 65536; i++ ) + { + CountCur = pNums[i]; + assert( CountCur > 0 ); + for ( k = 0; k <= CountCur; k++ ) + { + if ( k < CountCur ) + { + assert( pSops[i][k] >= 0 && pSops[i][k] < 81 ); + printf( "%c", s_Data3[pSops[i][k]] ); + } + else + printf( " " ); + if ( ++Counter == 75 ) + { + printf( "\",\n\"" ); + Counter = 0; + } + } + } + printf( "\n" ); + + return 1; +} + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfMan.c b/src/aig/cnf/cnfMan.c new file mode 100644 index 00000000..1edc012a --- /dev/null +++ b/src/aig/cnf/cnfMan.c @@ -0,0 +1,202 @@ +/**CFile**************************************************************** + + FileName [cnfMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfMan.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" +#include "satSolver.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static inline int Cnf_Lit2Var( int Lit ) { return (Lit & 1)? -(Lit >> 1)-1 : (Lit >> 1)+1; } +static inline int Cnf_Lit2Var2( int Lit ) { return (Lit & 1)? -(Lit >> 1) : (Lit >> 1); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Man_t * Cnf_ManStart() +{ + Cnf_Man_t * p; + int i; + // allocate the manager + p = ALLOC( Cnf_Man_t, 1 ); + memset( p, 0, sizeof(Cnf_Man_t) ); + // derive internal data structures + Cnf_ReadMsops( &p->pSopSizes, &p->pSops ); + // allocate memory manager for cuts + p->pMemCuts = Aig_MmFlexStart(); + p->nMergeLimit = 10; + // allocate temporary truth tables + p->pTruths[0] = ALLOC( unsigned, 4 * Aig_TruthWordNum(p->nMergeLimit) ); + for ( i = 1; i < 4; i++ ) + p->pTruths[i] = p->pTruths[i-1] + Aig_TruthWordNum(p->nMergeLimit); + p->vMemory = Vec_IntAlloc( 1 << 18 ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ManStop( Cnf_Man_t * p ) +{ + Vec_IntFree( p->vMemory ); + free( p->pTruths[0] ); + Aig_MmFlexStop( p->pMemCuts, 0 ); + free( p->pSopSizes ); + free( p->pSops[1] ); + free( p->pSops ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Returns the array of CI IDs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Cnf_DataCollectPiSatNums( Cnf_Dat_t * pCnf, Aig_Man_t * p ) +{ + Vec_Int_t * vCiIds; + Aig_Obj_t * pObj; + int i; + vCiIds = Vec_IntAlloc( Aig_ManPiNum(p) ); + Aig_ManForEachPi( p, pObj, i ) + Vec_IntPush( vCiIds, pCnf->pVarNums[pObj->Id] ); + return vCiIds; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_DataFree( Cnf_Dat_t * p ) +{ + if ( p == NULL ) + return; + free( p->pClauses[0] ); + free( p->pClauses ); + free( p->pVarNums ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Writes CNF into a file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_DataWriteIntoFile( Cnf_Dat_t * p, char * pFileName, int fReadable ) +{ + FILE * pFile; + int * pLit, * pStop, i; + pFile = fopen( pFileName, "w" ); + if ( pFile == NULL ) + { + printf( "Cnf_WriteIntoFile(): Output file cannot be opened.\n" ); + return; + } + fprintf( pFile, "c Result of efficient AIG-to-CNF conversion using package CNF\n" ); + fprintf( pFile, "p %d %d\n", p->nVars, p->nClauses ); + for ( i = 0; i < p->nClauses; i++ ) + { + for ( pLit = p->pClauses[i], pStop = p->pClauses[i+1]; pLit < pStop; pLit++ ) + fprintf( pFile, "%d ", fReadable? Cnf_Lit2Var2(*pLit) : Cnf_Lit2Var(*pLit) ); + fprintf( pFile, "0\n" ); + } + fprintf( pFile, "\n" ); + fclose( pFile ); +} + +/**Function************************************************************* + + Synopsis [Writes CNF into a file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void * Cnf_DataWriteIntoSolver( Cnf_Dat_t * p ) +{ + sat_solver * pSat; + int i, status; + pSat = sat_solver_new(); + sat_solver_setnvars( pSat, p->nVars ); + for ( i = 0; i < p->nClauses; i++ ) + { + if ( !sat_solver_addclause( pSat, p->pClauses[i], p->pClauses[i+1] ) ) + { + sat_solver_delete( pSat ); + return NULL; + } + } + status = sat_solver_simplify(pSat); + if ( status == 0 ) + { + sat_solver_delete( pSat ); + return NULL; + } + return pSat; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfMap.c b/src/aig/cnf/cnfMap.c new file mode 100644 index 00000000..d966df15 --- /dev/null +++ b/src/aig/cnf/cnfMap.c @@ -0,0 +1,356 @@ +/**CFile**************************************************************** + + FileName [cnfMap.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfMap.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes area flow of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutAssignAreaFlow( Cnf_Man_t * p, Dar_Cut_t * pCut, int * pAreaFlows ) +{ + Aig_Obj_t * pLeaf; + int i; + pCut->Value = 0; + pCut->uSign = 100 * Cnf_CutSopCost( p, pCut ); + Dar_CutForEachLeaf( p->pManAig, pCut, pLeaf, i ) + { + pCut->Value += pLeaf->nRefs; + if ( !Aig_ObjIsNode(pLeaf) ) + continue; + assert( pLeaf->nRefs > 0 ); + pCut->uSign += pAreaFlows[pLeaf->Id] / (pLeaf->nRefs? pLeaf->nRefs : 1); + } +} + +/**Function************************************************************* + + Synopsis [Computes area flow of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_CutSuperAreaFlow( Vec_Ptr_t * vSuper, int * pAreaFlows ) +{ + Aig_Obj_t * pLeaf; + int i, nAreaFlow; + nAreaFlow = 100 * (Vec_PtrSize(vSuper) + 1); + Vec_PtrForEachEntry( vSuper, pLeaf, i ) + { + pLeaf = Aig_Regular(pLeaf); + if ( !Aig_ObjIsNode(pLeaf) ) + continue; + assert( pLeaf->nRefs > 0 ); + nAreaFlow += pAreaFlows[pLeaf->Id] / (pLeaf->nRefs? pLeaf->nRefs : 1); + } + return nAreaFlow; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_DeriveMapping( Cnf_Man_t * p ) +{ + Vec_Ptr_t * vSuper; + Aig_Obj_t * pObj; + Dar_Cut_t * pCut, * pCutBest; + int i, k, AreaFlow, * pAreaFlows; + // allocate area flows + pAreaFlows = ALLOC( int, Aig_ManObjNumMax(p->pManAig) ); + memset( pAreaFlows, 0, sizeof(int) * Aig_ManObjNumMax(p->pManAig) ); + // visit the nodes in the topological order and update their best cuts + vSuper = Vec_PtrAlloc( 100 ); + Aig_ManForEachNode( p->pManAig, pObj, i ) + { + // go through the cuts + pCutBest = NULL; + Dar_ObjForEachCut( pObj, pCut, k ) + { + pCut->fBest = 0; + if ( k == 0 ) + continue; + Cnf_CutAssignAreaFlow( p, pCut, pAreaFlows ); + if ( pCutBest == NULL || pCutBest->uSign > pCut->uSign || + (pCutBest->uSign == pCut->uSign && pCutBest->Value < pCut->Value) ) + pCutBest = pCut; + } + // check the big cut +// Aig_ObjCollectSuper( pObj, vSuper ); + // get the area flow of this cut +// AreaFlow = Cnf_CutSuperAreaFlow( vSuper, pAreaFlows ); + AreaFlow = AIG_INFINITY; + if ( AreaFlow >= (int)pCutBest->uSign ) + { + pAreaFlows[pObj->Id] = pCutBest->uSign; + pCutBest->fBest = 1; + } + else + { + pAreaFlows[pObj->Id] = AreaFlow; + pObj->fMarkB = 1; // mark the special node + } + } + Vec_PtrFree( vSuper ); + free( pAreaFlows ); + +/* + // compute the area of mapping + AreaFlow = 0; + Aig_ManForEachPo( p->pManAig, pObj, i ) + AreaFlow += Dar_ObjBestCut(Aig_ObjFanin0(pObj))->uSign / 100 / Aig_ObjFanin0(pObj)->nRefs; + printf( "Area of the network = %d.\n", AreaFlow ); +*/ +} + + + +#if 0 + +/**Function************************************************************* + + Synopsis [Computes area of the first level.] + + Description [The cut need to be derefed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_CutDeref( Aig_Man_t * p, Dar_Cut_t * pCut ) +{ + Aig_Obj_t * pLeaf; + int i; + Dar_CutForEachLeaf( p, pCut, pLeaf, i ) + { + assert( pLeaf->nRefs > 0 ); + if ( --pLeaf->nRefs > 0 || !Aig_ObjIsAnd(pLeaf) ) + continue; + Aig_CutDeref( p, Aig_ObjBestCut(pLeaf) ); + } +} + +/**Function************************************************************* + + Synopsis [Computes area of the first level.] + + Description [The cut need to be derefed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_CutRef( Aig_Man_t * p, Dar_Cut_t * pCut ) +{ + Aig_Obj_t * pLeaf; + int i, Area = pCut->Value; + Dar_CutForEachLeaf( p, pCut, pLeaf, i ) + { + assert( pLeaf->nRefs >= 0 ); + if ( pLeaf->nRefs++ > 0 || !Aig_ObjIsAnd(pLeaf) ) + continue; + Area += Aig_CutRef( p, Aig_ObjBestCut(pLeaf) ); + } + return Area; +} + +/**Function************************************************************* + + Synopsis [Computes exact area of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_CutArea( Aig_Man_t * p, Dar_Cut_t * pCut ) +{ + int Area; + Area = Aig_CutRef( p, pCut ); + Aig_CutDeref( p, pCut ); + return Area; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the second cut is better.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cnf_CutCompare( Dar_Cut_t * pC0, Dar_Cut_t * pC1 ) +{ + if ( pC0->Area < pC1->Area - 0.0001 ) + return -1; + if ( pC0->Area > pC1->Area + 0.0001 ) // smaller area flow is better + return 1; +// if ( pC0->NoRefs < pC1->NoRefs ) +// return -1; +// if ( pC0->NoRefs > pC1->NoRefs ) // fewer non-referenced fanins is better +// return 1; +// if ( pC0->FanRefs / pC0->nLeaves > pC1->FanRefs / pC1->nLeaves ) +// return -1; +// if ( pC0->FanRefs / pC0->nLeaves < pC1->FanRefs / pC1->nLeaves ) +// return 1; // larger average fanin ref-counter is better +// return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns the cut with the smallest area flow.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Cut_t * Cnf_ObjFindBestCut( Aig_Obj_t * pObj ) +{ + Dar_Cut_t * pCut, * pCutBest; + int i; + pCutBest = NULL; + Dar_ObjForEachCut( pObj, pCut, i ) + if ( pCutBest == NULL || Cnf_CutCompare(pCutBest, pCut) == 1 ) + pCutBest = pCut; + return pCutBest; +} + +/**Function************************************************************* + + Synopsis [Computes area flow of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutAssignArea( Cnf_Man_t * p, Dar_Cut_t * pCut ) +{ + Aig_Obj_t * pLeaf; + int i; + pCut->Area = (float)pCut->Cost; + pCut->NoRefs = 0; + pCut->FanRefs = 0; + Dar_CutForEachLeaf( p->pManAig, pCut, pLeaf, i ) + { + if ( !Aig_ObjIsNode(pLeaf) ) + continue; + if ( pLeaf->nRefs == 0 ) + { + pCut->Area += Aig_ObjBestCut(pLeaf)->Cost; + pCut->NoRefs++; + } + else + { + if ( pCut->FanRefs + pLeaf->nRefs > 15 ) + pCut->FanRefs = 15; + else + pCut->FanRefs += pLeaf->nRefs; + } + } +} + +/**Function************************************************************* + + Synopsis [Performs one round of "area recovery" using exact local area.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_ManMapForCnf( Cnf_Man_t * p ) +{ + Aig_Obj_t * pObj; + Dar_Cut_t * pCut, * pCutBest; + int i, k; + // visit the nodes in the topological order and update their best cuts + Aig_ManForEachNode( p->pManAig, pObj, i ) + { + // find the old best cut + pCutBest = Aig_ObjBestCut(pObj); + Dar_ObjClearBestCut(pCutBest); + // if the node is used, dereference its cut + if ( pObj->nRefs ) + Aig_CutDeref( p->pManAig, pCutBest ); + + // evaluate the cuts of this node + Dar_ObjForEachCut( pObj, pCut, k ) +// Cnf_CutAssignAreaFlow( p, pCut ); + pCut->Area = (float)Cnf_CutArea( p->pManAig, pCut ); + + // find the new best cut + pCutBest = Cnf_ObjFindBestCut(pObj); + Dar_ObjSetBestCut( pCutBest ); + // if the node is used, reference its cut + if ( pObj->nRefs ) + Aig_CutRef( p->pManAig, pCutBest ); + } + return 1; +} + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfPost.c b/src/aig/cnf/cnfPost.c new file mode 100644 index 00000000..988275b2 --- /dev/null +++ b/src/aig/cnf/cnfPost.c @@ -0,0 +1,233 @@ +/**CFile**************************************************************** + + FileName [cnfPost.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfPost.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ManPostprocess_old( Cnf_Man_t * p ) +{ +// extern int Aig_ManLargeCutEval( Aig_Man_t * p, Aig_Obj_t * pRoot, Dar_Cut_t * pCutR, Dar_Cut_t * pCutL, int Leaf ); + int nNew, Gain, nGain = 0, nVars = 0; + + Aig_Obj_t * pObj, * pFan; + Dar_Cut_t * pCutBest, * pCut; + int i, k;//, a, b, Counter; + Aig_ManForEachObj( p->pManAig, pObj, i ) + { + if ( !Aig_ObjIsNode(pObj) ) + continue; + if ( pObj->nRefs == 0 ) + continue; +// pCutBest = Aig_ObjBestCut(pObj); + pCutBest = NULL; + + Dar_CutForEachLeaf( p->pManAig, pCutBest, pFan, k ) + { + if ( !Aig_ObjIsNode(pFan) ) + continue; + assert( pFan->nRefs != 0 ); + if ( pFan->nRefs != 1 ) + continue; +// pCut = Aig_ObjBestCut(pFan); + pCut = NULL; +/* + // find how many common variable they have + Counter = 0; + for ( a = 0; a < (int)pCut->nLeaves; a++ ) + { + for ( b = 0; b < (int)pCutBest->nLeaves; b++ ) + if ( pCut->pLeaves[a] == pCutBest->pLeaves[b] ) + break; + if ( b == (int)pCutBest->nLeaves ) + continue; + Counter++; + } + printf( "%d ", Counter ); +*/ + // find the new truth table after collapsing these two cuts + + +// nNew = Aig_ManLargeCutEval( p->pManAig, pObj, pCutBest, pCut, pFan->Id ); + nNew = 0; + + +// printf( "%d+%d=%d:%d(%d) ", pCutBest->Cost, pCut->Cost, +// pCutBest->Cost+pCut->Cost, nNew, pCutBest->Cost+pCut->Cost-nNew ); + + Gain = pCutBest->Value + pCut->Value - nNew; + if ( Gain > 0 ) + { + nGain += Gain; + nVars++; + } + } + } + printf( "Total gain = %d. Vars = %d.\n", nGain, nVars ); +} + +/**Function************************************************************* + + Synopsis [Transfers cuts of the mapped nodes into internal representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ManTransferCuts( Cnf_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_MmFlexRestart( p->pMemCuts ); + Aig_ManForEachObj( p->pManAig, pObj, i ) + { + if ( Aig_ObjIsNode(pObj) && pObj->nRefs > 0 ) + pObj->pData = Cnf_CutCreate( p, pObj ); + else + pObj->pData = NULL; + } +} + +/**Function************************************************************* + + Synopsis [Transfers cuts of the mapped nodes into internal representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ManFreeCuts( Cnf_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachObj( p->pManAig, pObj, i ) + if ( pObj->pData ) + { + Cnf_CutFree( pObj->pData ); + pObj->pData = NULL; + } +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_ManPostprocess( Cnf_Man_t * p ) +{ + Cnf_Cut_t * pCut, * pCutFan, * pCutRes; + Aig_Obj_t * pObj, * pFan; + int Order[16], Costs[16]; + int i, k, fChanges; + Aig_ManForEachNode( p->pManAig, pObj, i ) + { + if ( pObj->nRefs == 0 ) + continue; + pCut = Cnf_ObjBestCut(pObj); + + // sort fanins according to their size + Cnf_CutForEachLeaf( p->pManAig, pCut, pFan, k ) + { + Order[k] = k; + Costs[k] = Aig_ObjIsNode(pFan)? Cnf_ObjBestCut(pFan)->Cost : 0; + } + // sort the cuts by Weight + do { + int Temp; + fChanges = 0; + for ( k = 0; k < pCut->nFanins - 1; k++ ) + { + if ( Costs[Order[k]] <= Costs[Order[k+1]] ) + continue; + Temp = Order[k]; + Order[k] = Order[k+1]; + Order[k+1] = Temp; + fChanges = 1; + } + } while ( fChanges ); + + +// Cnf_CutForEachLeaf( p->pManAig, pCut, pFan, k ) + for ( k = 0; (k < (int)(pCut)->nFanins) && ((pFan) = Aig_ManObj(p->pManAig, (pCut)->pFanins[Order[k]])); k++ ) + { + if ( !Aig_ObjIsNode(pFan) ) + continue; + assert( pFan->nRefs != 0 ); + if ( pFan->nRefs != 1 ) + continue; + pCutFan = Cnf_ObjBestCut(pFan); + // try composing these two cuts +// Cnf_CutPrint( pCut ); + pCutRes = Cnf_CutCompose( p, pCut, pCutFan, pFan->Id ); +// Cnf_CutPrint( pCut ); +// printf( "\n" ); + // check if the cost if reduced + if ( pCutRes == NULL || pCutRes->Cost == 127 || pCutRes->Cost > pCut->Cost + pCutFan->Cost ) + { + if ( pCutRes ) + Cnf_CutFree( pCutRes ); + continue; + } + // update the cut + Cnf_ObjSetBestCut( pObj, pCutRes ); + Cnf_ObjSetBestCut( pFan, NULL ); + Cnf_CutUpdateRefs( p, pCut, pCutFan, pCutRes ); + assert( pFan->nRefs == 0 ); + Cnf_CutFree( pCut ); + Cnf_CutFree( pCutFan ); + break; + } + } +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfUtil.c b/src/aig/cnf/cnfUtil.c new file mode 100644 index 00000000..cd47cb58 --- /dev/null +++ b/src/aig/cnf/cnfUtil.c @@ -0,0 +1,188 @@ +/**CFile**************************************************************** + + FileName [cnfUtil.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfUtil.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes area, references, and nodes used in the mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_ManScanMapping_rec( Cnf_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vMapped ) +{ + Aig_Obj_t * pLeaf; + Dar_Cut_t * pCutBest; + int aArea, i; + if ( pObj->nRefs++ || Aig_ObjIsPi(pObj) || Aig_ObjIsConst1(pObj) ) + return 0; + assert( Aig_ObjIsAnd(pObj) ); + // collect the node first to derive pre-order + if ( vMapped ) + Vec_PtrPush( vMapped, pObj ); + // visit the transitive fanin of the selected cut + if ( pObj->fMarkB ) + { + Vec_Ptr_t * vSuper = Vec_PtrAlloc( 100 ); + Aig_ObjCollectSuper( pObj, vSuper ); + aArea = Vec_PtrSize(vSuper) + 1; + Vec_PtrForEachEntry( vSuper, pLeaf, i ) + aArea += Aig_ManScanMapping_rec( p, Aig_Regular(pLeaf), vMapped ); + Vec_PtrFree( vSuper ); + //////////////////////////// + pObj->fMarkB = 1; + } + else + { + pCutBest = Dar_ObjBestCut( pObj ); + aArea = Cnf_CutSopCost( p, pCutBest ); + Dar_CutForEachLeaf( p->pManAig, pCutBest, pLeaf, i ) + aArea += Aig_ManScanMapping_rec( p, pLeaf, vMapped ); + } + return aArea; +} + +/**Function************************************************************* + + Synopsis [Computes area, references, and nodes used in the mapping.] + + Description [Collects the nodes in reverse topological order.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Aig_ManScanMapping( Cnf_Man_t * p, int fCollect ) +{ + Vec_Ptr_t * vMapped = NULL; + Aig_Obj_t * pObj; + int i; + // clean all references + Aig_ManForEachObj( p->pManAig, pObj, i ) + pObj->nRefs = 0; + // allocate the array + if ( fCollect ) + vMapped = Vec_PtrAlloc( 1000 ); + // collect nodes reachable from POs in the DFS order through the best cuts + p->aArea = 0; + Aig_ManForEachPo( p->pManAig, pObj, i ) + p->aArea += Aig_ManScanMapping_rec( p, Aig_ObjFanin0(pObj), vMapped ); +// printf( "Variables = %6d. Clauses = %8d.\n", vMapped? Vec_PtrSize(vMapped) + Aig_ManPiNum(p->pManAig) + 1 : 0, p->aArea + 2 ); + return vMapped; +} + +/**Function************************************************************* + + Synopsis [Computes area, references, and nodes used in the mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_ManScanMapping_rec( Cnf_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vMapped, int fPreorder ) +{ + Aig_Obj_t * pLeaf; + Cnf_Cut_t * pCutBest; + int aArea, i; + if ( pObj->nRefs++ || Aig_ObjIsPi(pObj) || Aig_ObjIsConst1(pObj) ) + return 0; + assert( Aig_ObjIsAnd(pObj) ); + assert( pObj->pData != NULL ); + // add the node to the mapping + if ( vMapped && fPreorder ) + Vec_PtrPush( vMapped, pObj ); + // visit the transitive fanin of the selected cut + if ( pObj->fMarkB ) + { + Vec_Ptr_t * vSuper = Vec_PtrAlloc( 100 ); + Aig_ObjCollectSuper( pObj, vSuper ); + aArea = Vec_PtrSize(vSuper) + 1; + Vec_PtrForEachEntry( vSuper, pLeaf, i ) + aArea += Cnf_ManScanMapping_rec( p, Aig_Regular(pLeaf), vMapped, fPreorder ); + Vec_PtrFree( vSuper ); + //////////////////////////// + pObj->fMarkB = 1; + } + else + { + pCutBest = pObj->pData; + assert( pCutBest->Cost < 127 ); + aArea = pCutBest->Cost; + Cnf_CutForEachLeaf( p->pManAig, pCutBest, pLeaf, i ) + aArea += Cnf_ManScanMapping_rec( p, pLeaf, vMapped, fPreorder ); + } + // add the node to the mapping + if ( vMapped && !fPreorder ) + Vec_PtrPush( vMapped, pObj ); + return aArea; +} + +/**Function************************************************************* + + Synopsis [Computes area, references, and nodes used in the mapping.] + + Description [Collects the nodes in reverse topological order.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Cnf_ManScanMapping( Cnf_Man_t * p, int fCollect, int fPreorder ) +{ + Vec_Ptr_t * vMapped = NULL; + Aig_Obj_t * pObj; + int i; + // clean all references + Aig_ManForEachObj( p->pManAig, pObj, i ) + pObj->nRefs = 0; + // allocate the array + if ( fCollect ) + vMapped = Vec_PtrAlloc( 1000 ); + // collect nodes reachable from POs in the DFS order through the best cuts + p->aArea = 0; + Aig_ManForEachPo( p->pManAig, pObj, i ) + p->aArea += Cnf_ManScanMapping_rec( p, Aig_ObjFanin0(pObj), vMapped, fPreorder ); +// printf( "Variables = %6d. Clauses = %8d.\n", vMapped? Vec_PtrSize(vMapped) + Aig_ManPiNum(p->pManAig) + 1 : 0, p->aArea + 2 ); + return vMapped; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfWrite.c b/src/aig/cnf/cnfWrite.c new file mode 100644 index 00000000..45a3efad --- /dev/null +++ b/src/aig/cnf/cnfWrite.c @@ -0,0 +1,443 @@ +/**CFile**************************************************************** + + FileName [cnfWrite.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnfWrite.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Writes the cover into the array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_SopConvertToVector( char * pSop, int nCubes, Vec_Int_t * vCover ) +{ + int Lits[4], Cube, iCube, i, b; + Vec_IntClear( vCover ); + for ( i = 0; i < nCubes; i++ ) + { + Cube = pSop[i]; + for ( b = 0; b < 4; b++ ) + { + if ( Cube % 3 == 0 ) + Lits[b] = 1; + else if ( Cube % 3 == 1 ) + Lits[b] = 2; + else + Lits[b] = 0; + Cube = Cube / 3; + } + iCube = 0; + for ( b = 0; b < 4; b++ ) + iCube = (iCube << 2) | Lits[b]; + Vec_IntPush( vCover, iCube ); + } +} + +/**Function************************************************************* + + Synopsis [Returns the number of literals in the SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_SopCountLiterals( char * pSop, int nCubes ) +{ + int nLits = 0, Cube, i, b; + for ( i = 0; i < nCubes; i++ ) + { + Cube = pSop[i]; + for ( b = 0; b < 4; b++ ) + { + if ( Cube % 3 != 2 ) + nLits++; + Cube = Cube / 3; + } + } + return nLits; +} + +/**Function************************************************************* + + Synopsis [Returns the number of literals in the SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_IsopCountLiterals( Vec_Int_t * vIsop, int nVars ) +{ + int nLits = 0, Cube, i, b; + Vec_IntForEachEntry( vIsop, Cube, i ) + { + for ( b = 0; b < nVars; b++ ) + { + if ( (Cube & 3) == 1 || (Cube & 3) == 2 ) + nLits++; + Cube >>= 2; + } + } + return nLits; +} + +/**Function************************************************************* + + Synopsis [Writes the cube and returns the number of literals in it.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_IsopWriteCube( int Cube, int nVars, int * pVars, int * pLiterals ) +{ + int nLits = nVars, b; + for ( b = 0; b < nVars; b++ ) + { + if ( (Cube & 3) == 1 ) // value 0 --> write positive literal + *pLiterals++ = 2 * pVars[b]; + else if ( (Cube & 3) == 2 ) // value 1 --> write negative literal + *pLiterals++ = 2 * pVars[b] + 1; + else + nLits--; + Cube >>= 2; + } + return nLits; +} + +/**Function************************************************************* + + Synopsis [Derives CNF for the mapping.] + + Description [The last argument shows the number of last outputs + of the manager, which will not be converted into clauses but the + new variables for which will be introduced.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Dat_t * Cnf_ManWriteCnf( Cnf_Man_t * p, Vec_Ptr_t * vMapped, int nOutputs ) +{ + Aig_Obj_t * pObj; + Cnf_Dat_t * pCnf; + Cnf_Cut_t * pCut; + Vec_Int_t * vCover, * vSopTemp; + int OutVar, PoVar, pVars[32], * pLits, ** pClas; + unsigned uTruth; + int i, k, nLiterals, nClauses, Cube, Number; + + // count the number of literals and clauses + nLiterals = 1 + Aig_ManPoNum( p->pManAig ) + 3 * nOutputs; + nClauses = 1 + Aig_ManPoNum( p->pManAig ) + nOutputs; + Vec_PtrForEachEntry( vMapped, pObj, i ) + { + assert( Aig_ObjIsNode(pObj) ); + pCut = Cnf_ObjBestCut( pObj ); + + // positive polarity of the cut + if ( pCut->nFanins < 5 ) + { + uTruth = 0xFFFF & *Cnf_CutTruth(pCut); + nLiterals += Cnf_SopCountLiterals( p->pSops[uTruth], p->pSopSizes[uTruth] ) + p->pSopSizes[uTruth]; + assert( p->pSopSizes[uTruth] >= 0 ); + nClauses += p->pSopSizes[uTruth]; + } + else + { + nLiterals += Cnf_IsopCountLiterals( pCut->vIsop[1], pCut->nFanins ) + Vec_IntSize(pCut->vIsop[1]); + nClauses += Vec_IntSize(pCut->vIsop[1]); + } + // negative polarity of the cut + if ( pCut->nFanins < 5 ) + { + uTruth = 0xFFFF & ~*Cnf_CutTruth(pCut); + nLiterals += Cnf_SopCountLiterals( p->pSops[uTruth], p->pSopSizes[uTruth] ) + p->pSopSizes[uTruth]; + assert( p->pSopSizes[uTruth] >= 0 ); + nClauses += p->pSopSizes[uTruth]; + } + else + { + nLiterals += Cnf_IsopCountLiterals( pCut->vIsop[0], pCut->nFanins ) + Vec_IntSize(pCut->vIsop[0]); + nClauses += Vec_IntSize(pCut->vIsop[0]); + } +//printf( "%d ", nClauses-(1 + Aig_ManPoNum( p->pManAig )) ); + } +//printf( "\n" ); + + // allocate CNF + pCnf = ALLOC( Cnf_Dat_t, 1 ); + memset( pCnf, 0, sizeof(Cnf_Dat_t) ); + pCnf->nLiterals = nLiterals; + pCnf->nClauses = nClauses; + pCnf->pClauses = ALLOC( int *, nClauses + 1 ); + pCnf->pClauses[0] = ALLOC( int, nLiterals ); + pCnf->pClauses[nClauses] = pCnf->pClauses[0] + nLiterals; + + // create room for variable numbers + pCnf->pVarNums = ALLOC( int, Aig_ManObjNumMax(p->pManAig) ); + memset( pCnf->pVarNums, 0xff, sizeof(int) * Aig_ManObjNumMax(p->pManAig) ); + // assign variables to the last (nOutputs) POs + Number = 1; + if ( nOutputs ) + { + assert( nOutputs == Aig_ManRegNum(p->pManAig) ); + Aig_ManForEachLiSeq( p->pManAig, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + } + // assign variables to the internal nodes + Vec_PtrForEachEntry( vMapped, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + // assign variables to the PIs and constant node + Aig_ManForEachPi( p->pManAig, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + pCnf->pVarNums[Aig_ManConst1(p->pManAig)->Id] = Number++; + pCnf->nVars = Number; + + // assign the clauses + vSopTemp = Vec_IntAlloc( 1 << 16 ); + pLits = pCnf->pClauses[0]; + pClas = pCnf->pClauses; + Vec_PtrForEachEntry( vMapped, pObj, i ) + { + pCut = Cnf_ObjBestCut( pObj ); + + // save variables of this cut + OutVar = pCnf->pVarNums[ pObj->Id ]; + for ( k = 0; k < (int)pCut->nFanins; k++ ) + { + pVars[k] = pCnf->pVarNums[ pCut->pFanins[k] ]; + assert( pVars[k] <= Aig_ManObjNumMax(p->pManAig) ); + } + + // positive polarity of the cut + if ( pCut->nFanins < 5 ) + { + uTruth = 0xFFFF & *Cnf_CutTruth(pCut); + Cnf_SopConvertToVector( p->pSops[uTruth], p->pSopSizes[uTruth], vSopTemp ); + vCover = vSopTemp; + } + else + vCover = pCut->vIsop[1]; + Vec_IntForEachEntry( vCover, Cube, k ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + pLits += Cnf_IsopWriteCube( Cube, pCut->nFanins, pVars, pLits ); + } + + // negative polarity of the cut + if ( pCut->nFanins < 5 ) + { + uTruth = 0xFFFF & ~*Cnf_CutTruth(pCut); + Cnf_SopConvertToVector( p->pSops[uTruth], p->pSopSizes[uTruth], vSopTemp ); + vCover = vSopTemp; + } + else + vCover = pCut->vIsop[0]; + Vec_IntForEachEntry( vCover, Cube, k ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar + 1; + pLits += Cnf_IsopWriteCube( Cube, pCut->nFanins, pVars, pLits ); + } + } + Vec_IntFree( vSopTemp ); + + // write the constant literal + OutVar = pCnf->pVarNums[ Aig_ManConst1(p->pManAig)->Id ]; + assert( OutVar <= Aig_ManObjNumMax(p->pManAig) ); + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + + // write the output literals + Aig_ManForEachPo( p->pManAig, pObj, i ) + { + OutVar = pCnf->pVarNums[ Aig_ObjFanin0(pObj)->Id ]; + if ( i < Aig_ManPoNum(p->pManAig) - nOutputs ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); + } + else + { + PoVar = pCnf->pVarNums[ pObj->Id ]; + // first clause + *pClas++ = pLits; + *pLits++ = 2 * PoVar; + *pLits++ = 2 * OutVar + !Aig_ObjFaninC0(pObj); + // second clause + *pClas++ = pLits; + *pLits++ = 2 * PoVar + 1; + *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); + } + } + + // verify that the correct number of literals and clauses was written + assert( pLits - pCnf->pClauses[0] == nLiterals ); + assert( pClas - pCnf->pClauses == nClauses ); + return pCnf; +} + + +/**Function************************************************************* + + Synopsis [Derives a simple CNF for the AIG.] + + Description [The last argument shows the number of last outputs + of the manager, which will not be converted into clauses but the + new variables for which will be introduced.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Dat_t * Cnf_DeriveSimple( Aig_Man_t * p, int nOutputs ) +{ + Aig_Obj_t * pObj; + Cnf_Dat_t * pCnf; + int OutVar, PoVar, pVars[32], * pLits, ** pClas; + int i, nLiterals, nClauses, Number; + + // count the number of literals and clauses + nLiterals = 1 + 7 * Aig_ManNodeNum(p) + Aig_ManPoNum( p ) + 3 * nOutputs; + nClauses = 1 + 3 * Aig_ManNodeNum(p) + Aig_ManPoNum( p ) + nOutputs; + + // allocate CNF + pCnf = ALLOC( Cnf_Dat_t, 1 ); + memset( pCnf, 0, sizeof(Cnf_Dat_t) ); + pCnf->nLiterals = nLiterals; + pCnf->nClauses = nClauses; + pCnf->pClauses = ALLOC( int *, nClauses + 1 ); + pCnf->pClauses[0] = ALLOC( int, nLiterals ); + pCnf->pClauses[nClauses] = pCnf->pClauses[0] + nLiterals; + + // create room for variable numbers + pCnf->pVarNums = ALLOC( int, Aig_ManObjNumMax(p) ); + memset( pCnf->pVarNums, 0xff, sizeof(int) * Aig_ManObjNumMax(p) ); + // assign variables to the last (nOutputs) POs + Number = 1; + if ( nOutputs ) + { + assert( nOutputs == Aig_ManRegNum(p) ); + Aig_ManForEachLiSeq( p, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + } + // assign variables to the internal nodes + Aig_ManForEachNode( p, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + // assign variables to the PIs and constant node + Aig_ManForEachPi( p, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + pCnf->pVarNums[Aig_ManConst1(p)->Id] = Number++; + pCnf->nVars = Number; +/* + // print CNF numbers + printf( "SAT numbers of each node:\n" ); + Aig_ManForEachObj( p, pObj, i ) + printf( "%d=%d ", pObj->Id, pCnf->pVarNums[pObj->Id] ); + printf( "\n" ); +*/ + // assign the clauses + pLits = pCnf->pClauses[0]; + pClas = pCnf->pClauses; + Aig_ManForEachNode( p, pObj, i ) + { + OutVar = pCnf->pVarNums[ pObj->Id ]; + pVars[0] = pCnf->pVarNums[ Aig_ObjFanin0(pObj)->Id ]; + pVars[1] = pCnf->pVarNums[ Aig_ObjFanin1(pObj)->Id ]; + + // positive phase + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + *pLits++ = 2 * pVars[0] + !Aig_ObjFaninC0(pObj); + *pLits++ = 2 * pVars[1] + !Aig_ObjFaninC1(pObj); + // negative phase + *pClas++ = pLits; + *pLits++ = 2 * OutVar + 1; + *pLits++ = 2 * pVars[0] + Aig_ObjFaninC0(pObj); + *pClas++ = pLits; + *pLits++ = 2 * OutVar + 1; + *pLits++ = 2 * pVars[1] + Aig_ObjFaninC1(pObj); + } + + // write the constant literal + OutVar = pCnf->pVarNums[ Aig_ManConst1(p)->Id ]; + assert( OutVar <= Aig_ManObjNumMax(p) ); + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + + // write the output literals + Aig_ManForEachPo( p, pObj, i ) + { + OutVar = pCnf->pVarNums[ Aig_ObjFanin0(pObj)->Id ]; + if ( i < Aig_ManPoNum(p) - nOutputs ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); + } + else + { + PoVar = pCnf->pVarNums[ pObj->Id ]; + // first clause + *pClas++ = pLits; + *pLits++ = 2 * PoVar; + *pLits++ = 2 * OutVar + !Aig_ObjFaninC0(pObj); + // second clause + *pClas++ = pLits; + *pLits++ = 2 * PoVar + 1; + *pLits++ = 2 * OutVar + Aig_ObjFaninC0(pObj); + } + } + + // verify that the correct number of literals and clauses was written + assert( pLits - pCnf->pClauses[0] == nLiterals ); + assert( pClas - pCnf->pClauses == nClauses ); + return pCnf; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnf_.c b/src/aig/cnf/cnf_.c new file mode 100644 index 00000000..7c9ca499 --- /dev/null +++ b/src/aig/cnf/cnf_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [cnf_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: cnf_.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/module.make b/src/aig/cnf/module.make new file mode 100644 index 00000000..dbcaeba4 --- /dev/null +++ b/src/aig/cnf/module.make @@ -0,0 +1,8 @@ +SRC += src/aig/cnf/cnfCore.c \ + src/aig/cnf/cnfCut.c \ + src/aig/cnf/cnfData.c \ + src/aig/cnf/cnfMan.c \ + src/aig/cnf/cnfMap.c \ + src/aig/cnf/cnfPost.c \ + src/aig/cnf/cnfUtil.c \ + src/aig/cnf/cnfWrite.c diff --git a/src/aig/csw/csw.h b/src/aig/csw/csw.h new file mode 100644 index 00000000..1443f4d9 --- /dev/null +++ b/src/aig/csw/csw.h @@ -0,0 +1,65 @@ +/**CFile**************************************************************** + + FileName [csw.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: csw.h,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __CSW_H__ +#define __CSW_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== cnfCore.c ========================================================*/ +extern Aig_Man_t * Csw_Sweep( Aig_Man_t * pAig, int nCutsMax, int nLeafMax, int fVerbose ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/csw/cswCore.c b/src/aig/csw/cswCore.c new file mode 100644 index 00000000..20893058 --- /dev/null +++ b/src/aig/csw/cswCore.c @@ -0,0 +1,94 @@ +/**CFile**************************************************************** + + FileName [cswCore.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: cswCore.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cswInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Csw_Sweep( Aig_Man_t * pAig, int nCutsMax, int nLeafMax, int fVerbose ) +{ + Csw_Man_t * p; + Aig_Man_t * pRes; + Aig_Obj_t * pObj, * pObjNew, * pObjRes; + int i, clk; +clk = clock(); + // start the manager + p = Csw_ManStart( pAig, nCutsMax, nLeafMax, fVerbose ); + // set elementary cuts at the PIs + Aig_ManForEachPi( p->pManRes, pObj, i ) + { + Csw_ObjPrepareCuts( p, pObj, 1 ); + Csw_ObjAddRefs( p, pObj, Aig_ManPi(p->pManAig,i)->nRefs ); + } + // process the nodes + Aig_ManForEachNode( pAig, pObj, i ) + { + // create the new node + pObjNew = Aig_And( p->pManRes, Csw_ObjChild0Equiv(p, pObj), Csw_ObjChild1Equiv(p, pObj) ); + // check if this node can be represented using another node +// pObjRes = Csw_ObjSweep( p, Aig_Regular(pObjNew), pObj->nRefs > 1 ); +// pObjRes = Aig_NotCond( pObjRes, Aig_IsComplement(pObjNew) ); + // try recursively if resubsitution is used + do { + pObjRes = Csw_ObjSweep( p, Aig_Regular(pObjNew), pObj->nRefs > 1 ); + pObjRes = Aig_NotCond( pObjRes, Aig_IsComplement(pObjNew) ); + pObjNew = pObjRes; + } while ( Csw_ObjCuts(p, Aig_Regular(pObjNew)) == NULL && !Aig_ObjIsConst1(Aig_Regular(pObjNew)) ); + // save the resulting node + Csw_ObjSetEquiv( p, pObj, pObjRes ); + // add to the reference counter + Csw_ObjAddRefs( p, Aig_Regular(pObjRes), pObj->nRefs ); + } + // add the POs + Aig_ManForEachPo( pAig, pObj, i ) + Aig_ObjCreatePo( p->pManRes, Csw_ObjChild0Equiv(p, pObj) ); + // remove dangling nodes + Aig_ManCleanup( p->pManRes ); + // return the resulting manager +p->timeTotal = clock() - clk; +p->timeOther = p->timeTotal - p->timeCuts - p->timeHash; + pRes = p->pManRes; + Csw_ManStop( p ); + return pRes; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/csw/cswCut.c b/src/aig/csw/cswCut.c new file mode 100644 index 00000000..b3b7152b --- /dev/null +++ b/src/aig/csw/cswCut.c @@ -0,0 +1,602 @@ +/**CFile**************************************************************** + + FileName [cswCut.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: cswCut.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cswInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Compute the cost of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Csw_CutFindCost( Csw_Man_t * p, Csw_Cut_t * pCut ) +{ + Aig_Obj_t * pLeaf; + int i, Cost = 0; + assert( pCut->nFanins > 0 ); + Csw_CutForEachLeaf( p->pManRes, pCut, pLeaf, i ) + { +// Cost += pLeaf->nRefs; + Cost += Csw_ObjRefs( p, pLeaf ); +// printf( "%d ", pLeaf->nRefs ); + } +//printf( "\n" ); + return Cost * 100 / pCut->nFanins; +} + +/**Function************************************************************* + + Synopsis [Compute the cost of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline float Csw_CutFindCost2( Csw_Man_t * p, Csw_Cut_t * pCut ) +{ + Aig_Obj_t * pLeaf; + float Cost = 0.0; + int i; + assert( pCut->nFanins > 0 ); + Csw_CutForEachLeaf( p->pManRes, pCut, pLeaf, i ) + Cost += (float)1.0/pLeaf->nRefs; + return 1/Cost; +} + +/**Function************************************************************* + + Synopsis [Returns the next free cut to use.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Csw_Cut_t * Csw_CutFindFree( Csw_Man_t * p, Aig_Obj_t * pObj ) +{ + Csw_Cut_t * pCut, * pCutMax; + int i; + pCutMax = NULL; + Csw_ObjForEachCut( p, pObj, pCut, i ) + { + if ( pCut->nFanins == 0 ) + return pCut; + if ( pCutMax == NULL || pCutMax->Cost < pCut->Cost ) + pCutMax = pCut; + } + assert( pCutMax != NULL ); + pCutMax->nFanins = 0; + return pCutMax; +} + +/**Function************************************************************* + + Synopsis [Computes the stretching phase of the cut w.r.t. the merged cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Cut_TruthPhase( Csw_Cut_t * pCut, Csw_Cut_t * pCut1 ) +{ + unsigned uPhase = 0; + int i, k; + for ( i = k = 0; i < pCut->nFanins; i++ ) + { + if ( k == pCut1->nFanins ) + break; + if ( pCut->pFanins[i] < pCut1->pFanins[k] ) + continue; + assert( pCut->pFanins[i] == pCut1->pFanins[k] ); + uPhase |= (1 << i); + k++; + } + return uPhase; +} + +/**Function************************************************************* + + Synopsis [Performs truth table computation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Csw_CutComputeTruth( Csw_Man_t * p, Csw_Cut_t * pCut, Csw_Cut_t * pCut0, Csw_Cut_t * pCut1, int fCompl0, int fCompl1 ) +{ + // permute the first table + if ( fCompl0 ) + Kit_TruthNot( p->puTemp[0], Csw_CutTruth(pCut0), p->nLeafMax ); + else + Kit_TruthCopy( p->puTemp[0], Csw_CutTruth(pCut0), p->nLeafMax ); + Kit_TruthStretch( p->puTemp[2], p->puTemp[0], pCut0->nFanins, p->nLeafMax, Cut_TruthPhase(pCut, pCut0), 0 ); + // permute the second table + if ( fCompl1 ) + Kit_TruthNot( p->puTemp[1], Csw_CutTruth(pCut1), p->nLeafMax ); + else + Kit_TruthCopy( p->puTemp[1], Csw_CutTruth(pCut1), p->nLeafMax ); + Kit_TruthStretch( p->puTemp[3], p->puTemp[1], pCut1->nFanins, p->nLeafMax, Cut_TruthPhase(pCut, pCut1), 0 ); + // produce the resulting table + Kit_TruthAnd( Csw_CutTruth(pCut), p->puTemp[2], p->puTemp[3], p->nLeafMax ); +// assert( pCut->nFanins >= Kit_TruthSupportSize( Csw_CutTruth(pCut), p->nLeafMax ) ); + return Csw_CutTruth(pCut); +} + +/**Function************************************************************* + + Synopsis [Performs support minimization for the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Csw_CutSupportMinimize( Csw_Man_t * p, Csw_Cut_t * pCut ) +{ + unsigned * pTruth; + int uSupp, nFansNew, i, k; + // get truth table + pTruth = Csw_CutTruth( pCut ); + // get support + uSupp = Kit_TruthSupport( pTruth, p->nLeafMax ); + // get the new support size + nFansNew = Kit_WordCountOnes( uSupp ); + // check if there are redundant variables + if ( nFansNew == pCut->nFanins ) + return nFansNew; + assert( nFansNew < pCut->nFanins ); + // minimize support + Kit_TruthShrink( p->puTemp[0], pTruth, nFansNew, p->nLeafMax, uSupp, 1 ); + for ( i = k = 0; i < pCut->nFanins; i++ ) + if ( uSupp & (1 << i) ) + pCut->pFanins[k++] = pCut->pFanins[i]; + assert( k == nFansNew ); + pCut->nFanins = nFansNew; +// assert( nFansNew == Kit_TruthSupportSize( pTruth, p->nLeafMax ) ); +//Extra_PrintBinary( stdout, pTruth, (1<<p->nLeafMax) ); printf( "\n" ); + return nFansNew; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pDom is contained in pCut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Csw_CutCheckDominance( Csw_Cut_t * pDom, Csw_Cut_t * pCut ) +{ + int i, k; + for ( i = 0; i < (int)pDom->nFanins; i++ ) + { + for ( k = 0; k < (int)pCut->nFanins; k++ ) + if ( pDom->pFanins[i] == pCut->pFanins[k] ) + break; + if ( k == (int)pCut->nFanins ) // node i in pDom is not contained in pCut + return 0; + } + // every node in pDom is contained in pCut + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the cut is contained.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Csw_CutFilter( Csw_Man_t * p, Aig_Obj_t * pObj, Csw_Cut_t * pCut ) +{ + Csw_Cut_t * pTemp; + int i; + // go through the cuts of the node + Csw_ObjForEachCut( p, pObj, pTemp, i ) + { + if ( pTemp->nFanins < 2 ) + continue; + if ( pTemp == pCut ) + continue; + if ( pTemp->nFanins > pCut->nFanins ) + { + // skip the non-contained cuts + if ( (pTemp->uSign & pCut->uSign) != pCut->uSign ) + continue; + // check containment seriously + if ( Csw_CutCheckDominance( pCut, pTemp ) ) + { + // remove contained cut + pTemp->nFanins = 0; + } + } + else + { + // skip the non-contained cuts + if ( (pTemp->uSign & pCut->uSign) != pTemp->uSign ) + continue; + // check containment seriously + if ( Csw_CutCheckDominance( pTemp, pCut ) ) + { + // remove the given + pCut->nFanins = 0; + return 1; + } + } + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Merges two cuts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Csw_CutMergeOrdered( Csw_Man_t * p, Csw_Cut_t * pC0, Csw_Cut_t * pC1, Csw_Cut_t * pC ) +{ + int i, k, c; + assert( pC0->nFanins >= pC1->nFanins ); + // the case of the largest cut sizes + if ( pC0->nFanins == p->nLeafMax && pC1->nFanins == p->nLeafMax ) + { + for ( i = 0; i < pC0->nFanins; i++ ) + if ( pC0->pFanins[i] != pC1->pFanins[i] ) + return 0; + for ( i = 0; i < pC0->nFanins; i++ ) + pC->pFanins[i] = pC0->pFanins[i]; + pC->nFanins = pC0->nFanins; + return 1; + } + // the case when one of the cuts is the largest + if ( pC0->nFanins == p->nLeafMax ) + { + for ( i = 0; i < pC1->nFanins; i++ ) + { + for ( k = pC0->nFanins - 1; k >= 0; k-- ) + if ( pC0->pFanins[k] == pC1->pFanins[i] ) + break; + if ( k == -1 ) // did not find + return 0; + } + for ( i = 0; i < pC0->nFanins; i++ ) + pC->pFanins[i] = pC0->pFanins[i]; + pC->nFanins = pC0->nFanins; + return 1; + } + + // compare two cuts with different numbers + i = k = 0; + for ( c = 0; c < p->nLeafMax; c++ ) + { + if ( k == pC1->nFanins ) + { + if ( i == pC0->nFanins ) + { + pC->nFanins = c; + return 1; + } + pC->pFanins[c] = pC0->pFanins[i++]; + continue; + } + if ( i == pC0->nFanins ) + { + if ( k == pC1->nFanins ) + { + pC->nFanins = c; + return 1; + } + pC->pFanins[c] = pC1->pFanins[k++]; + continue; + } + if ( pC0->pFanins[i] < pC1->pFanins[k] ) + { + pC->pFanins[c] = pC0->pFanins[i++]; + continue; + } + if ( pC0->pFanins[i] > pC1->pFanins[k] ) + { + pC->pFanins[c] = pC1->pFanins[k++]; + continue; + } + pC->pFanins[c] = pC0->pFanins[i++]; + k++; + } + if ( i < pC0->nFanins || k < pC1->nFanins ) + return 0; + pC->nFanins = c; + return 1; +} + +/**Function************************************************************* + + Synopsis [Prepares the object for FPGA mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Csw_CutMerge( Csw_Man_t * p, Csw_Cut_t * pCut0, Csw_Cut_t * pCut1, Csw_Cut_t * pCut ) +{ + assert( p->nLeafMax > 0 ); + // merge the nodes + if ( pCut0->nFanins < pCut1->nFanins ) + { + if ( !Csw_CutMergeOrdered( p, pCut1, pCut0, pCut ) ) + return 0; + } + else + { + if ( !Csw_CutMergeOrdered( p, pCut0, pCut1, pCut ) ) + return 0; + } + pCut->uSign = pCut0->uSign | pCut1->uSign; + return 1; +} + +/**Function************************************************************* + + Synopsis [Consider cut with more than 2 fanins having 2 true variables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Csw_ObjTwoVarCut( Csw_Man_t * p, Csw_Cut_t * pCut ) +{ + Aig_Obj_t * pRes, * pIn0, * pIn1; + int nVars, uTruth, fCompl = 0; + assert( pCut->nFanins > 2 ); + // minimize support of this cut + nVars = Csw_CutSupportMinimize( p, pCut ); + assert( nVars == 2 ); + // get the fanins + pIn0 = Aig_ManObj( p->pManRes, pCut->pFanins[0] ); + pIn1 = Aig_ManObj( p->pManRes, pCut->pFanins[1] ); + // derive the truth table + uTruth = 0xF & *Csw_CutTruth(pCut); + if ( uTruth == 14 || uTruth == 13 || uTruth == 11 || uTruth == 7 ) + { + uTruth = 0xF & ~uTruth; + fCompl = 1; + } + // compute the result + pRes = NULL; + if ( uTruth == 1 ) // 0001 // 1110 14 + pRes = Aig_And( p->pManRes, Aig_Not(pIn0), Aig_Not(pIn1) ); + if ( uTruth == 2 ) // 0010 // 1101 13 + pRes = Aig_And( p->pManRes, pIn0 , Aig_Not(pIn1) ); + if ( uTruth == 4 ) // 0100 // 1011 11 + pRes = Aig_And( p->pManRes, Aig_Not(pIn0), pIn1 ); + if ( uTruth == 8 ) // 1000 // 0111 7 + pRes = Aig_And( p->pManRes, pIn0 , pIn1 ); + if ( pRes ) + pRes = Aig_NotCond( pRes, fCompl ); + return pRes; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Csw_Cut_t * Csw_ObjPrepareCuts( Csw_Man_t * p, Aig_Obj_t * pObj, int fTriv ) +{ + Csw_Cut_t * pCutSet, * pCut; + int i; + // create the cutset of the node + pCutSet = (Csw_Cut_t *)Aig_MmFixedEntryFetch( p->pMemCuts ); + Csw_ObjSetCuts( p, pObj, pCutSet ); + Csw_ObjForEachCut( p, pObj, pCut, i ) + { + pCut->nFanins = 0; + pCut->iNode = pObj->Id; + pCut->nCutSize = p->nCutSize; + pCut->nLeafMax = p->nLeafMax; + } + // add unit cut if needed + if ( fTriv ) + { + pCut = pCutSet; + pCut->Cost = 0; + pCut->iNode = pObj->Id; + pCut->nFanins = 1; + pCut->pFanins[0] = pObj->Id; + pCut->uSign = Aig_ObjCutSign( pObj->Id ); + memset( Csw_CutTruth(pCut), 0xAA, sizeof(unsigned) * p->nTruthWords ); + } + return pCutSet; +} + +/**Function************************************************************* + + Synopsis [Derives cuts for one node and sweeps this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Csw_ObjSweep( Csw_Man_t * p, Aig_Obj_t * pObj, int fTriv ) +{ + int fUseResub = 1; + Csw_Cut_t * pCut0, * pCut1, * pCut, * pCutSet; + Aig_Obj_t * pFanin0 = Aig_ObjFanin0(pObj); + Aig_Obj_t * pFanin1 = Aig_ObjFanin1(pObj); + Aig_Obj_t * pObjNew; + unsigned * pTruth; + int i, k, nVars, nFanins, iVar, clk; + + assert( !Aig_IsComplement(pObj) ); + if ( !Aig_ObjIsNode(pObj) ) + return pObj; + if ( Csw_ObjCuts(p, pObj) ) + return pObj; + // the node is not processed yet + assert( Csw_ObjCuts(p, pObj) == NULL ); + assert( Aig_ObjIsNode(pObj) ); + + // set up the first cut + pCutSet = Csw_ObjPrepareCuts( p, pObj, fTriv ); + + // compute pair-wise cut combinations while checking table + Csw_ObjForEachCut( p, pFanin0, pCut0, i ) + if ( pCut0->nFanins > 0 ) + Csw_ObjForEachCut( p, pFanin1, pCut1, k ) + if ( pCut1->nFanins > 0 ) + { + // make sure K-feasible cut exists + if ( Kit_WordCountOnes(pCut0->uSign | pCut1->uSign) > p->nLeafMax ) + continue; + // get the next cut of this node + pCut = Csw_CutFindFree( p, pObj ); +clk = clock(); + // assemble the new cut + if ( !Csw_CutMerge( p, pCut0, pCut1, pCut ) ) + { + assert( pCut->nFanins == 0 ); + continue; + } + // check containment + if ( Csw_CutFilter( p, pObj, pCut ) ) + { + assert( pCut->nFanins == 0 ); + continue; + } + // create its truth table + pTruth = Csw_CutComputeTruth( p, pCut, pCut0, pCut1, Aig_ObjFaninC0(pObj), Aig_ObjFaninC1(pObj) ); + // support minimize the truth table + nFanins = pCut->nFanins; +// nVars = Csw_CutSupportMinimize( p, pCut ); // leads to quality degradation + nVars = Kit_TruthSupportSize( pTruth, p->nLeafMax ); +p->timeCuts += clock() - clk; + + // check for trivial truth tables + if ( nVars == 0 ) + { + p->nNodesTriv0++; + return Aig_NotCond( Aig_ManConst1(p->pManRes), !(pTruth[0] & 1) ); + } + if ( nVars == 1 ) + { + p->nNodesTriv1++; + iVar = Kit_WordFindFirstBit( Kit_TruthSupport(pTruth, p->nLeafMax) ); + assert( iVar < pCut->nFanins ); + return Aig_NotCond( Aig_ManObj(p->pManRes, pCut->pFanins[iVar]), (pTruth[0] & 1) ); + } + if ( nVars == 2 && nFanins > 2 && fUseResub ) + { + if ( pObjNew = Csw_ObjTwoVarCut( p, pCut ) ) + { + p->nNodesTriv2++; + return pObjNew; + } + } + + // check if an equivalent node with the same cut exists +clk = clock(); + pObjNew = pCut->nFanins > 2 ? Csw_TableCutLookup( p, pCut ) : NULL; +p->timeHash += clock() - clk; + if ( pObjNew ) + { + p->nNodesCuts++; + return pObjNew; + } + + // assign the cost + pCut->Cost = Csw_CutFindCost( p, pCut ); + assert( pCut->nFanins > 0 ); + assert( pCut->Cost > 0 ); + } + p->nNodesTried++; + + // load the resulting cuts into the table +clk = clock(); + Csw_ObjForEachCut( p, pObj, pCut, i ) + { + if ( pCut->nFanins > 2 ) + { + assert( pCut->Cost > 0 ); + Csw_TableCutInsert( p, pCut ); + } + } +p->timeHash += clock() - clk; + + // return the node if could not replace it + return pObj; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/csw/cswInt.h b/src/aig/csw/cswInt.h new file mode 100644 index 00000000..37efe9b4 --- /dev/null +++ b/src/aig/csw/cswInt.h @@ -0,0 +1,157 @@ +/**CFile**************************************************************** + + FileName [cswInt.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: cswInt.h,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __CSW_INT_H__ +#define __CSW_INT_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +#include "aig.h" +#include "dar.h" +#include "kit.h" +#include "csw.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Csw_Man_t_ Csw_Man_t; +typedef struct Csw_Cut_t_ Csw_Cut_t; + +// the cut used to represent node in the AIG +struct Csw_Cut_t_ +{ + Csw_Cut_t * pNext; // the next cut in the table + int Cost; // the cost of the cut +// float Cost; // the cost of the cut + unsigned uSign; // cut signature + int iNode; // the node, for which it is the cut + short nCutSize; // the number of bytes in the cut + char nLeafMax; // the maximum number of fanins + char nFanins; // the current number of fanins + int pFanins[0]; // the fanins (followed by the truth table) +}; + +// the CNF computation manager +struct Csw_Man_t_ +{ + // AIG manager + Aig_Man_t * pManAig; // the input AIG manager + Aig_Man_t * pManRes; // the output AIG manager + Aig_Obj_t ** pEquiv; // the equivalent nodes in the resulting manager + Csw_Cut_t ** pCuts; // the cuts for each node in the output manager + int * pnRefs; // the number of references of each new node + // hash table for cuts + Csw_Cut_t ** pTable; // the table composed of cuts + int nTableSize; // the size of hash table + // parameters + int nCutsMax; // the max number of cuts at the node + int nLeafMax; // the max number of leaves of a cut + int fVerbose; // enables verbose output + // internal variables + int nCutSize; // the number of bytes needed to store one cut + int nTruthWords; // the number of truth table words + Aig_MmFixed_t * pMemCuts; // memory manager for cuts + unsigned * puTemp[4]; // used for the truth table computation + // statistics + int nNodesTriv0; // the number of trivial nodes + int nNodesTriv1; // the number of trivial nodes + int nNodesTriv2; // the number of trivial nodes + int nNodesCuts; // the number of rewritten nodes + int nNodesTried; // the number of nodes tried + int timeCuts; // time to compute the cut and its truth table + int timeHash; // time for hashing cuts + int timeOther; // other time + int timeTotal; // total time +}; + +static inline int Csw_CutLeaveNum( Csw_Cut_t * pCut ) { return pCut->nFanins; } +static inline int * Csw_CutLeaves( Csw_Cut_t * pCut ) { return pCut->pFanins; } +static inline unsigned * Csw_CutTruth( Csw_Cut_t * pCut ) { return (unsigned *)(pCut->pFanins + pCut->nLeafMax); } +static inline Csw_Cut_t * Csw_CutNext( Csw_Cut_t * pCut ) { return (Csw_Cut_t *)(((char *)pCut) + pCut->nCutSize); } + +static inline int Csw_ObjRefs( Csw_Man_t * p, Aig_Obj_t * pObj ) { return p->pnRefs[pObj->Id]; } +static inline void Csw_ObjAddRefs( Csw_Man_t * p, Aig_Obj_t * pObj, int nRefs ) { p->pnRefs[pObj->Id] += nRefs; } + +static inline Csw_Cut_t * Csw_ObjCuts( Csw_Man_t * p, Aig_Obj_t * pObj ) { return p->pCuts[pObj->Id]; } +static inline void Csw_ObjSetCuts( Csw_Man_t * p, Aig_Obj_t * pObj, Csw_Cut_t * pCuts ) { p->pCuts[pObj->Id] = pCuts; } + +static inline Aig_Obj_t * Csw_ObjEquiv( Csw_Man_t * p, Aig_Obj_t * pObj ) { return p->pEquiv[pObj->Id]; } +static inline void Csw_ObjSetEquiv( Csw_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pEquiv ) { p->pEquiv[pObj->Id] = pEquiv; } + +static inline Aig_Obj_t * Csw_ObjChild0Equiv( Csw_Man_t * p, Aig_Obj_t * pObj ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin0(pObj)? Aig_NotCond(Csw_ObjEquiv(p, Aig_ObjFanin0(pObj)), Aig_ObjFaninC0(pObj)) : NULL; } +static inline Aig_Obj_t * Csw_ObjChild1Equiv( Csw_Man_t * p, Aig_Obj_t * pObj ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin1(pObj)? Aig_NotCond(Csw_ObjEquiv(p, Aig_ObjFanin1(pObj)), Aig_ObjFaninC1(pObj)) : NULL; } + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over cuts of the node +#define Csw_ObjForEachCut( p, pObj, pCut, i ) \ + for ( i = 0, pCut = Csw_ObjCuts(p, pObj); i < p->nCutsMax; i++, pCut = Csw_CutNext(pCut) ) +// iterator over leaves of the cut +#define Csw_CutForEachLeaf( p, pCut, pLeaf, i ) \ + for ( i = 0; (i < (int)(pCut)->nFanins) && ((pLeaf) = Aig_ManObj(p, (pCut)->pFanins[i])); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== cnfCut.c ========================================================*/ +extern Csw_Cut_t * Csw_ObjPrepareCuts( Csw_Man_t * p, Aig_Obj_t * pObj, int fTriv ); +extern Aig_Obj_t * Csw_ObjSweep( Csw_Man_t * p, Aig_Obj_t * pObj, int fTriv ); +/*=== cnfMan.c ========================================================*/ +extern Csw_Man_t * Csw_ManStart( Aig_Man_t * pMan, int nCutsMax, int nLeafMax, int fVerbose ); +extern void Csw_ManStop( Csw_Man_t * p ); +/*=== cnfTable.c ========================================================*/ +extern int Csw_TableCountCuts( Csw_Man_t * p ); +extern void Csw_TableCutInsert( Csw_Man_t * p, Csw_Cut_t * pCut ); +extern Aig_Obj_t * Csw_TableCutLookup( Csw_Man_t * p, Csw_Cut_t * pCut ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/csw/cswMan.c b/src/aig/csw/cswMan.c new file mode 100644 index 00000000..c3061dee --- /dev/null +++ b/src/aig/csw/cswMan.c @@ -0,0 +1,125 @@ +/**CFile**************************************************************** + + FileName [cswMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: cswMan.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cswInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the cut sweeping manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Csw_Man_t * Csw_ManStart( Aig_Man_t * pMan, int nCutsMax, int nLeafMax, int fVerbose ) +{ + Csw_Man_t * p; + Aig_Obj_t * pObj; + int i; + assert( nCutsMax >= 2 ); + assert( nLeafMax <= 16 ); + // allocate the fraiging manager + p = ALLOC( Csw_Man_t, 1 ); + memset( p, 0, sizeof(Csw_Man_t) ); + p->nCutsMax = nCutsMax; + p->nLeafMax = nLeafMax; + p->fVerbose = fVerbose; + p->pManAig = pMan; + // create the new manager + p->pManRes = Aig_ManStartFrom( pMan ); + assert( Aig_ManPiNum(p->pManAig) == Aig_ManPiNum(p->pManRes) ); + // allocate room for cuts and equivalent nodes + p->pnRefs = ALLOC( int, Aig_ManObjNumMax(pMan) ); + p->pEquiv = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(pMan) ); + p->pCuts = ALLOC( Csw_Cut_t *, Aig_ManObjNumMax(pMan) ); + memset( p->pCuts, 0, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(pMan) ); + memset( p->pnRefs, 0, sizeof(int) * Aig_ManObjNumMax(pMan) ); + // allocate memory manager + p->nTruthWords = Aig_TruthWordNum(nLeafMax); + p->nCutSize = sizeof(Csw_Cut_t) + sizeof(int) * nLeafMax + sizeof(unsigned) * p->nTruthWords; + p->pMemCuts = Aig_MmFixedStart( p->nCutSize * p->nCutsMax, 512 ); + // allocate hash table for cuts + p->nTableSize = Aig_PrimeCudd( Aig_ManNodeNum(pMan) * p->nCutsMax / 2 ); + p->pTable = ALLOC( Csw_Cut_t *, p->nTableSize ); + memset( p->pTable, 0, sizeof(Aig_Obj_t *) * p->nTableSize ); + // set the pointers to the available fraig nodes + Csw_ObjSetEquiv( p, Aig_ManConst1(p->pManAig), Aig_ManConst1(p->pManRes) ); + Aig_ManForEachPi( p->pManAig, pObj, i ) + Csw_ObjSetEquiv( p, pObj, Aig_ManPi(p->pManRes, i) ); + // room for temporary truth tables + p->puTemp[0] = ALLOC( unsigned, 4 * p->nTruthWords ); + p->puTemp[1] = p->puTemp[0] + p->nTruthWords; + p->puTemp[2] = p->puTemp[1] + p->nTruthWords; + p->puTemp[3] = p->puTemp[2] + p->nTruthWords; + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Csw_ManStop( Csw_Man_t * p ) +{ + if ( p->fVerbose ) + { + int nNodesBeg = Aig_ManNodeNum(p->pManAig); + int nNodesEnd = Aig_ManNodeNum(p->pManRes); + printf( "Beg = %7d. End = %7d. (%6.2f %%) Try = %7d. Cuts = %8d.\n", + nNodesBeg, nNodesEnd, 100.0*(nNodesBeg-nNodesEnd)/nNodesBeg, + p->nNodesTried, Csw_TableCountCuts( p ) ); + printf( "Triv0 = %6d. Triv1 = %6d. Triv2 = %6d. Cut-replace = %6d.\n", + p->nNodesTriv0, p->nNodesTriv1, p->nNodesTriv2, p->nNodesCuts ); + PRTP( "Cuts ", p->timeCuts, p->timeTotal ); + PRTP( "Hashing ", p->timeHash, p->timeTotal ); + PRTP( "Other ", p->timeOther, p->timeTotal ); + PRTP( "TOTAL ", p->timeTotal, p->timeTotal ); + } + free( p->puTemp[0] ); + Aig_MmFixedStop( p->pMemCuts, 0 ); + free( p->pnRefs ); + free( p->pEquiv ); + free( p->pCuts ); + free( p->pTable ); + free( p ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/csw/cswTable.c b/src/aig/csw/cswTable.c new file mode 100644 index 00000000..87e36ae1 --- /dev/null +++ b/src/aig/csw/cswTable.c @@ -0,0 +1,161 @@ +/**CFile**************************************************************** + + FileName [cswTable.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: cswTable.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cswInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes hash value of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Csw_CutHash( Csw_Cut_t * pCut ) +{ + static int s_FPrimes[128] = { + 1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459, + 1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997, + 2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543, + 2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089, + 3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671, + 3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243, + 4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871, + 4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471, + 5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073, + 6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689, + 6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309, + 7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933, + 8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147 + }; + unsigned uHash; + int i; + assert( pCut->nFanins <= 16 ); + uHash = 0; + for ( i = 0; i < pCut->nFanins; i++ ) + uHash ^= pCut->pFanins[i] * s_FPrimes[i]; + return uHash; +} + +/**Function************************************************************* + + Synopsis [Returns the total number of cuts in the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Csw_TableCountCuts( Csw_Man_t * p ) +{ + Csw_Cut_t * pEnt; + int i, Counter = 0; + for ( i = 0; i < p->nTableSize; i++ ) + for ( pEnt = p->pTable[i]; pEnt; pEnt = pEnt->pNext ) + Counter++; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Adds the cut to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Csw_TableCutInsert( Csw_Man_t * p, Csw_Cut_t * pCut ) +{ + int iEntry = Csw_CutHash(pCut) % p->nTableSize; + pCut->pNext = p->pTable[iEntry]; + p->pTable[iEntry] = pCut; +} + +/**Function************************************************************* + + Synopsis [Returns an equivalent node if it exists.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Csw_TableCutLookup( Csw_Man_t * p, Csw_Cut_t * pCut ) +{ + Aig_Obj_t * pRes = NULL; + Csw_Cut_t * pEnt; + unsigned * pTruthNew, * pTruthOld; + int iEntry = Csw_CutHash(pCut) % p->nTableSize; + for ( pEnt = p->pTable[iEntry]; pEnt; pEnt = pEnt->pNext ) + { + if ( pEnt->nFanins != pCut->nFanins ) + continue; + if ( pEnt->uSign != pCut->uSign ) + continue; + if ( memcmp( pEnt->pFanins, pCut->pFanins, sizeof(int) * pCut->nFanins ) ) + continue; + pTruthOld = Csw_CutTruth(pEnt); + pTruthNew = Csw_CutTruth(pCut); + if ( (pTruthOld[0] & 1) == (pTruthNew[0] & 1) ) + { + if ( Kit_TruthIsEqual( pTruthOld, pTruthNew, pCut->nFanins ) ) + { + pRes = Aig_ManObj( p->pManRes, pEnt->iNode ); + assert( pRes->fPhase == Aig_ManObj( p->pManRes, pCut->iNode )->fPhase ); + break; + } + } + else + { + if ( Kit_TruthIsOpposite( pTruthOld, pTruthNew, pCut->nFanins ) ) + { + pRes = Aig_Not( Aig_ManObj( p->pManRes, pEnt->iNode ) ); + assert( Aig_Regular(pRes)->fPhase != Aig_ManObj( p->pManRes, pCut->iNode )->fPhase ); + break; + } + } + } + return pRes; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/csw/csw_.c b/src/aig/csw/csw_.c new file mode 100644 index 00000000..1c59f152 --- /dev/null +++ b/src/aig/csw/csw_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [csw_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cut sweeping.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - July 11, 2007.] + + Revision [$Id: csw_.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cswInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/csw/module.make b/src/aig/csw/module.make new file mode 100644 index 00000000..8fdb7bef --- /dev/null +++ b/src/aig/csw/module.make @@ -0,0 +1,4 @@ +SRC += src/aig/csw/cswCore.c \ + src/aig/csw/cswCut.c \ + src/aig/csw/cswMan.c \ + src/aig/csw/cswTable.c diff --git a/src/aig/dar/dar.h b/src/aig/dar/dar.h new file mode 100644 index 00000000..2a4fcaf3 --- /dev/null +++ b/src/aig/dar/dar.h @@ -0,0 +1,106 @@ +/**CFile**************************************************************** + + FileName [dar.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: dar.h,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __DAR_H__ +#define __DAR_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Dar_RwrPar_t_ Dar_RwrPar_t; +typedef struct Dar_RefPar_t_ Dar_RefPar_t; + +struct Dar_RwrPar_t_ +{ + int nCutsMax; // the maximum number of cuts to try + int nSubgMax; // the maximum number of subgraphs to try + int fFanout; // support fanout representation + int fUpdateLevel; // update level + int fUseZeros; // performs zero-cost replacement + int fVerbose; // enables verbose output + int fVeryVerbose; // enables very verbose output +}; + +struct Dar_RefPar_t_ +{ + int nMffcMin; // the min MFFC size for which refactoring is used + int nLeafMax; // the max number of leaves of a cut + int nCutsMax; // the max number of cuts to consider + int fExtend; // extends the cut below MFFC + int fUpdateLevel; // updates the level after each move + int fUseZeros; // perform zero-cost replacements + int fVerbose; // verbosity level + int fVeryVerbose; // enables very verbose output +}; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== darLib.c ========================================================*/ +extern void Dar_LibStart(); +extern void Dar_LibStop(); +/*=== darBalance.c ========================================================*/ +extern Aig_Man_t * Dar_ManBalance( Aig_Man_t * p, int fUpdateLevel ); +/*=== darCore.c ========================================================*/ +extern void Dar_ManDefaultRwrParams( Dar_RwrPar_t * pPars ); +extern int Dar_ManRewrite( Aig_Man_t * pAig, Dar_RwrPar_t * pPars ); +extern Aig_MmFixed_t * Dar_ManComputeCuts( Aig_Man_t * pAig, int nCutsMax ); +/*=== darRefact.c ========================================================*/ +extern void Dar_ManDefaultRefParams( Dar_RefPar_t * pPars ); +extern int Dar_ManRefactor( Aig_Man_t * pAig, Dar_RefPar_t * pPars ); +/*=== darScript.c ========================================================*/ +extern Aig_Man_t * Dar_ManRewriteDefault( Aig_Man_t * pAig ); +extern Aig_Man_t * Dar_ManRwsat( Aig_Man_t * pAig, int fBalance, int fVerbose ); +extern Aig_Man_t * Dar_ManCompress( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ); +extern Aig_Man_t * Dar_ManCompress2( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ); +extern Aig_Man_t * Dar_ManChoice( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/dar/darBalance.c b/src/aig/dar/darBalance.c new file mode 100644 index 00000000..b3c5d645 --- /dev/null +++ b/src/aig/dar/darBalance.c @@ -0,0 +1,400 @@ +/**CFile**************************************************************** + + FileName [darBalance.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Algebraic AIG balancing.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darBalance.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Aig_Obj_t * Dar_Balance_rec( Aig_Man_t * pNew, Aig_Obj_t * pObj, Vec_Vec_t * vStore, int Level, int fUpdateLevel ); +static Vec_Ptr_t * Dar_BalanceCone( Aig_Obj_t * pObj, Vec_Vec_t * vStore, int Level ); +static int Dar_BalanceFindLeft( Vec_Ptr_t * vSuper ); +static void Dar_BalancePermute( Aig_Man_t * p, Vec_Ptr_t * vSuper, int LeftBound, int fExor ); +static void Dar_BalancePushUniqueOrderByLevel( Vec_Ptr_t * vStore, Aig_Obj_t * pObj ); +static Aig_Obj_t * Dar_BalanceBuildSuper( Aig_Man_t * p, Vec_Ptr_t * vSuper, Aig_Type_t Type, int fUpdateLevel ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs algebraic balancing of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Dar_ManBalance( Aig_Man_t * p, int fUpdateLevel ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj, * pDriver, * pObjNew; + Vec_Vec_t * vStore; + int i; + // create the new manager + pNew = Aig_ManStart( Aig_ManObjNumMax(p) ); + pNew->pName = Aig_UtilStrsav( p->pName ); + pNew->nRegs = p->nRegs; + pNew->nAsserts = p->nAsserts; + if ( p->vFlopNums ) + pNew->vFlopNums = Vec_IntDup( p->vFlopNums ); + // map the PI nodes + Aig_ManCleanData( p ); + Aig_ManConst1(p)->pData = Aig_ManConst1(pNew); + Aig_ManForEachPi( p, pObj, i ) + pObj->pData = Aig_ObjCreatePi(pNew); + // balance the AIG + vStore = Vec_VecAlloc( 50 ); + Aig_ManForEachPo( p, pObj, i ) + { + pDriver = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + pObjNew = Dar_Balance_rec( pNew, Aig_Regular(pDriver), vStore, 0, fUpdateLevel ); + pObjNew = Aig_NotCond( pObjNew, Aig_IsComplement(pDriver) ); + Aig_ObjCreatePo( pNew, pObjNew ); + } + Vec_VecFree( vStore ); + // remove dangling nodes + if ( (i = Aig_ManCleanup( pNew )) ) + { +// printf( "Cleanup after balancing removed %d dangling nodes.\n", i ); + } + // check the resulting AIG + if ( !Aig_ManCheck(pNew) ) + printf( "Dar_ManBalance(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Returns the new node constructed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Dar_Balance_rec( Aig_Man_t * pNew, Aig_Obj_t * pObjOld, Vec_Vec_t * vStore, int Level, int fUpdateLevel ) +{ + Aig_Obj_t * pObjNew; + Vec_Ptr_t * vSuper; + int i; + assert( !Aig_IsComplement(pObjOld) ); + assert( !Aig_ObjIsBuf(pObjOld) ); + // return if the result is known + if ( pObjOld->pData ) + return pObjOld->pData; + assert( Aig_ObjIsNode(pObjOld) ); + // get the implication supergate + vSuper = Dar_BalanceCone( pObjOld, vStore, Level ); + // check if supergate contains two nodes in the opposite polarity + if ( vSuper->nSize == 0 ) + return pObjOld->pData = Aig_ManConst0(pNew); + if ( Vec_PtrSize(vSuper) < 2 ) + printf( "BUG!\n" ); + // for each old node, derive the new well-balanced node + for ( i = 0; i < Vec_PtrSize(vSuper); i++ ) + { + pObjNew = Dar_Balance_rec( pNew, Aig_Regular(vSuper->pArray[i]), vStore, Level + 1, fUpdateLevel ); + vSuper->pArray[i] = Aig_NotCond( pObjNew, Aig_IsComplement(vSuper->pArray[i]) ); + } + // build the supergate + pObjNew = Dar_BalanceBuildSuper( pNew, vSuper, Aig_ObjType(pObjOld), fUpdateLevel ); + // make sure the balanced node is not assigned +// assert( pObjOld->Level >= Aig_Regular(pObjNew)->Level ); + assert( pObjOld->pData == NULL ); + return pObjOld->pData = pObjNew; +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_BalanceCone_rec( Aig_Obj_t * pRoot, Aig_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + int RetValue1, RetValue2, i; + // check if the node is visited + if ( Aig_Regular(pObj)->fMarkB ) + { + // check if the node occurs in the same polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == pObj ) + return 1; + // check if the node is present in the opposite polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == Aig_Not(pObj) ) + return -1; + assert( 0 ); + return 0; + } + // if the new node is complemented or a PI, another gate begins + if ( pObj != pRoot && (Aig_IsComplement(pObj) || Aig_ObjType(pObj) != Aig_ObjType(pRoot) || Aig_ObjRefs(pObj) > 1) ) + { + Vec_PtrPush( vSuper, pObj ); + Aig_Regular(pObj)->fMarkB = 1; + return 0; + } + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsNode(pObj) ); + // go through the branches + RetValue1 = Dar_BalanceCone_rec( pRoot, Aig_ObjReal_rec( Aig_ObjChild0(pObj) ), vSuper ); + RetValue2 = Dar_BalanceCone_rec( pRoot, Aig_ObjReal_rec( Aig_ObjChild1(pObj) ), vSuper ); + if ( RetValue1 == -1 || RetValue2 == -1 ) + return -1; + // return 1 if at least one branch has a duplicate + return RetValue1 || RetValue2; +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Dar_BalanceCone( Aig_Obj_t * pObj, Vec_Vec_t * vStore, int Level ) +{ + Vec_Ptr_t * vNodes; + int RetValue, i; + assert( !Aig_IsComplement(pObj) ); + // extend the storage + if ( Vec_VecSize( vStore ) <= Level ) + Vec_VecPush( vStore, Level, 0 ); + // get the temporary array of nodes + vNodes = Vec_VecEntry( vStore, Level ); + Vec_PtrClear( vNodes ); + // collect the nodes in the implication supergate + RetValue = Dar_BalanceCone_rec( pObj, pObj, vNodes ); + assert( vNodes->nSize > 1 ); + // unmark the visited nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + Aig_Regular(pObj)->fMarkB = 0; + // if we found the node and its complement in the same implication supergate, + // return empty set of nodes (meaning that we should use constant-0 node) + if ( RetValue == -1 ) + vNodes->nSize = 0; + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Procedure used for sorting the nodes in decreasing order of levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Aig_NodeCompareLevelsDecrease( Aig_Obj_t ** pp1, Aig_Obj_t ** pp2 ) +{ + int Diff = Aig_ObjLevel(Aig_Regular(*pp1)) - Aig_ObjLevel(Aig_Regular(*pp2)); + if ( Diff > 0 ) + return -1; + if ( Diff < 0 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Builds implication supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Dar_BalanceBuildSuper( Aig_Man_t * p, Vec_Ptr_t * vSuper, Aig_Type_t Type, int fUpdateLevel ) +{ + Aig_Obj_t * pObj1, * pObj2; + int LeftBound; + assert( vSuper->nSize > 1 ); + // sort the new nodes by level in the decreasing order + Vec_PtrSort( vSuper, Aig_NodeCompareLevelsDecrease ); + // balance the nodes + while ( vSuper->nSize > 1 ) + { + // find the left bound on the node to be paired + LeftBound = (!fUpdateLevel)? 0 : Dar_BalanceFindLeft( vSuper ); + // find the node that can be shared (if no such node, randomize choice) + Dar_BalancePermute( p, vSuper, LeftBound, Type == AIG_OBJ_EXOR ); + // pull out the last two nodes + pObj1 = Vec_PtrPop(vSuper); + pObj2 = Vec_PtrPop(vSuper); + Dar_BalancePushUniqueOrderByLevel( vSuper, Aig_Oper(p, pObj1, pObj2, Type) ); + } + return Vec_PtrEntry(vSuper, 0); +} + +/**Function************************************************************* + + Synopsis [Finds the left bound on the next candidate to be paired.] + + Description [The nodes in the array are in the decreasing order of levels. + The last node in the array has the smallest level. By default it would be paired + with the next node on the left. However, it may be possible to pair it with some + other node on the left, in such a way that the new node is shared. This procedure + finds the index of the left-most node, which can be paired with the last node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_BalanceFindLeft( Vec_Ptr_t * vSuper ) +{ + Aig_Obj_t * pObjRight, * pObjLeft; + int Current; + // if two or less nodes, pair with the first + if ( Vec_PtrSize(vSuper) < 3 ) + return 0; + // set the pointer to the one before the last + Current = Vec_PtrSize(vSuper) - 2; + pObjRight = Vec_PtrEntry( vSuper, Current ); + // go through the nodes to the left of this one + for ( Current--; Current >= 0; Current-- ) + { + // get the next node on the left + pObjLeft = Vec_PtrEntry( vSuper, Current ); + // if the level of this node is different, quit the loop + if ( Aig_ObjLevel(Aig_Regular(pObjLeft)) != Aig_ObjLevel(Aig_Regular(pObjRight)) ) + break; + } + Current++; + // get the node, for which the equality holds + pObjLeft = Vec_PtrEntry( vSuper, Current ); + assert( Aig_ObjLevel(Aig_Regular(pObjLeft)) == Aig_ObjLevel(Aig_Regular(pObjRight)) ); + return Current; +} + +/**Function************************************************************* + + Synopsis [Moves closer to the end the node that is best for sharing.] + + Description [If there is no node with sharing, randomly chooses one of + the legal nodes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_BalancePermute( Aig_Man_t * p, Vec_Ptr_t * vSuper, int LeftBound, int fExor ) +{ + Aig_Obj_t * pObj1, * pObj2, * pObj3, * pGhost; + int RightBound, i; + // get the right bound + RightBound = Vec_PtrSize(vSuper) - 2; + assert( LeftBound <= RightBound ); + if ( LeftBound == RightBound ) + return; + // get the two last nodes + pObj1 = Vec_PtrEntry( vSuper, RightBound + 1 ); + pObj2 = Vec_PtrEntry( vSuper, RightBound ); + if ( Aig_Regular(pObj1) == p->pConst1 || Aig_Regular(pObj2) == p->pConst1 ) + return; + // find the first node that can be shared + for ( i = RightBound; i >= LeftBound; i-- ) + { + pObj3 = Vec_PtrEntry( vSuper, i ); + if ( Aig_Regular(pObj3) == p->pConst1 ) + { + Vec_PtrWriteEntry( vSuper, i, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + return; + } + pGhost = Aig_ObjCreateGhost( p, pObj1, pObj3, fExor? AIG_OBJ_EXOR : AIG_OBJ_AND ); + if ( Aig_TableLookup( p, pGhost ) ) + { + if ( pObj3 == pObj2 ) + return; + Vec_PtrWriteEntry( vSuper, i, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + return; + } + } +/* + // we did not find the node to share, randomize choice + { + int Choice = rand() % (RightBound - LeftBound + 1); + pObj3 = Vec_PtrEntry( vSuper, LeftBound + Choice ); + if ( pObj3 == pObj2 ) + return; + Vec_PtrWriteEntry( vSuper, LeftBound + Choice, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + } +*/ +} + +/**Function************************************************************* + + Synopsis [Inserts a new node in the order by levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_BalancePushUniqueOrderByLevel( Vec_Ptr_t * vStore, Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pObj1, * pObj2; + int i; + if ( Vec_PtrPushUnique(vStore, pObj) ) + return; + // find the p of the node + for ( i = vStore->nSize-1; i > 0; i-- ) + { + pObj1 = vStore->pArray[i ]; + pObj2 = vStore->pArray[i-1]; + if ( Aig_ObjLevel(Aig_Regular(pObj1)) <= Aig_ObjLevel(Aig_Regular(pObj2)) ) + break; + vStore->pArray[i ] = pObj2; + vStore->pArray[i-1] = pObj1; + } +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darCore.c b/src/aig/dar/darCore.c new file mode 100644 index 00000000..f4041dd1 --- /dev/null +++ b/src/aig/dar/darCore.c @@ -0,0 +1,244 @@ +/**CFile**************************************************************** + + FileName [darCore.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Core of the rewriting package.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darCore.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns the structure with default assignment of parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManDefaultRwrParams( Dar_RwrPar_t * pPars ) +{ + memset( pPars, 0, sizeof(Dar_RwrPar_t) ); + pPars->nCutsMax = 8; // 8 + pPars->nSubgMax = 5; // 5 is a "magic number" + pPars->fFanout = 1; + pPars->fUpdateLevel = 0; + pPars->fUseZeros = 0; + pPars->fVerbose = 0; + pPars->fVeryVerbose = 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_ManRewrite( Aig_Man_t * pAig, Dar_RwrPar_t * pPars ) +{ + Dar_Man_t * p; +// Bar_Progress_t * pProgress; + Dar_Cut_t * pCut; + Aig_Obj_t * pObj, * pObjNew; + int i, k, nNodesOld, nNodeBefore, nNodeAfter, Required; + int clk = 0, clkStart; + // prepare the library + Dar_LibPrepare( pPars->nSubgMax ); + // create rewriting manager + p = Dar_ManStart( pAig, pPars ); + // remove dangling nodes + Aig_ManCleanup( pAig ); + // if updating levels is requested, start fanout and timing + if ( p->pPars->fFanout ) + Aig_ManFanoutStart( pAig ); + if ( p->pPars->fUpdateLevel ) + Aig_ManStartReverseLevels( pAig, 0 ); + // set elementary cuts for the PIs + Dar_ManCutsStart( p ); + // resynthesize each node once + clkStart = clock(); + p->nNodesInit = Aig_ManNodeNum(pAig); + nNodesOld = Vec_PtrSize( pAig->vObjs ); + +// pProgress = Bar_ProgressStart( stdout, nNodesOld ); + Aig_ManForEachObj( pAig, pObj, i ) +// pProgress = Bar_ProgressStart( stdout, 100 ); +// Aig_ManOrderStart( pAig ); +// Aig_ManForEachNodeInOrder( pAig, pObj ) + { +// Bar_ProgressUpdate( pProgress, 100*pAig->nAndPrev/pAig->nAndTotal, NULL ); + +// Bar_ProgressUpdate( pProgress, i, NULL ); + if ( !Aig_ObjIsNode(pObj) ) + continue; + if ( i > nNodesOld ) + break; + + // consider freeing the cuts +// if ( (i & 0xFFF) == 0 && Aig_MmFixedReadMemUsage(p->pMemCuts)/(1<<20) > 100 ) +// Dar_ManCutsStart( p ); + + // compute cuts for the node + p->nNodesTried++; +clk = clock(); + Dar_ObjComputeCuts_rec( p, pObj ); +p->timeCuts += clock() - clk; + + // check if there is a trivial cut + Dar_ObjForEachCut( pObj, pCut, k ) + if ( pCut->nLeaves == 0 || (pCut->nLeaves == 1 && pCut->pLeaves[0] != pObj->Id && Aig_ManObj(p->pAig, pCut->pLeaves[0])) ) + break; + if ( k < (int)pObj->nCuts ) + { + assert( pCut->nLeaves < 2 ); + if ( pCut->nLeaves == 0 ) // replace by constant + { + assert( pCut->uTruth == 0 || pCut->uTruth == 0xFFFF ); + pObjNew = Aig_NotCond( Aig_ManConst1(p->pAig), pCut->uTruth==0 ); + } + else + { + assert( pCut->uTruth == 0xAAAA || pCut->uTruth == 0x5555 ); + pObjNew = Aig_NotCond( Aig_ManObj(p->pAig, pCut->pLeaves[0]), pCut->uTruth==0x5555 ); + } + // remove the old cuts + Dar_ObjSetCuts( pObj, NULL ); + // replace the node + Aig_ObjReplace( pAig, pObj, pObjNew, 1, p->pPars->fUpdateLevel ); + continue; + } + + // evaluate the cuts + p->GainBest = -1; + Required = pAig->vLevelR? Aig_ObjRequiredLevel(pAig, pObj) : AIG_INFINITY; + Dar_ObjForEachCut( pObj, pCut, k ) + Dar_LibEval( p, pObj, pCut, Required ); + // check the best gain + if ( !(p->GainBest > 0 || (p->GainBest == 0 && p->pPars->fUseZeros)) ) + { +// Aig_ObjOrderAdvance( pAig ); + continue; + } + // remove the old cuts + Dar_ObjSetCuts( pObj, NULL ); + // if we end up here, a rewriting step is accepted + nNodeBefore = Aig_ManNodeNum( pAig ); + pObjNew = Dar_LibBuildBest( p ); // pObjNew can be complemented! + pObjNew = Aig_NotCond( pObjNew, Aig_ObjPhaseReal(pObjNew) ^ pObj->fPhase ); + assert( (int)Aig_Regular(pObjNew)->Level <= Required ); + // replace the node + Aig_ObjReplace( pAig, pObj, pObjNew, 1, p->pPars->fUpdateLevel ); + // compare the gains + nNodeAfter = Aig_ManNodeNum( pAig ); + assert( p->GainBest <= nNodeBefore - nNodeAfter ); + // count gains of this class + p->ClassGains[p->ClassBest] += nNodeBefore - nNodeAfter; + } +// Aig_ManOrderStop( pAig ); + +p->timeTotal = clock() - clkStart; +p->timeOther = p->timeTotal - p->timeCuts - p->timeEval; + +// Bar_ProgressStop( pProgress ); + p->nCutMemUsed = Aig_MmFixedReadMemUsage(p->pMemCuts)/(1<<20); + Dar_ManCutsFree( p ); + // put the nodes into the DFS order and reassign their IDs +// Aig_NtkReassignIds( p ); + // fix the levels +// Aig_ManVerifyLevel( pAig ); + if ( p->pPars->fFanout ) + Aig_ManFanoutStop( pAig ); + if ( p->pPars->fUpdateLevel ) + { +// Aig_ManVerifyReverseLevel( pAig ); + Aig_ManStopReverseLevels( pAig ); + } + // stop the rewriting manager + Dar_ManStop( p ); + Aig_ManCheckPhase( pAig ); + // check + if ( !Aig_ManCheck( pAig ) ) + { + printf( "Aig_ManRewrite: The network check has failed.\n" ); + return 0; + } + return 1; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_MmFixed_t * Dar_ManComputeCuts( Aig_Man_t * pAig, int nCutsMax ) +{ + Dar_Man_t * p; + Dar_RwrPar_t Pars, * pPars = &Pars; + Aig_Obj_t * pObj; + Aig_MmFixed_t * pMemCuts; + int i, nNodes; + // remove dangling nodes + if ( (nNodes = Aig_ManCleanup( pAig )) ) + { +// printf( "Removing %d nodes.\n", nNodes ); + } + // create default parameters + Dar_ManDefaultRwrParams( pPars ); + pPars->nCutsMax = nCutsMax; + // create rewriting manager + p = Dar_ManStart( pAig, pPars ); + // set elementary cuts for the PIs + Dar_ManCutsStart( p ); + // compute cuts for each nodes in the topological order + Aig_ManForEachNode( pAig, pObj, i ) + Dar_ObjComputeCuts( p, pObj ); + // free the cuts + pMemCuts = p->pMemCuts; + p->pMemCuts = NULL; +// Dar_ManCutsFree( p ); + // stop the rewriting manager + Dar_ManStop( p ); + return pMemCuts; +} + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darCut.c b/src/aig/dar/darCut.c new file mode 100644 index 00000000..08bd77a9 --- /dev/null +++ b/src/aig/dar/darCut.c @@ -0,0 +1,698 @@ +/**CFile**************************************************************** + + FileName [darCut.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Computation of 4-input cuts.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darCut.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns the number of 1s in the machine word.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_WordCountOnes( unsigned uWord ) +{ + uWord = (uWord & 0x55555555) + ((uWord>>1) & 0x55555555); + uWord = (uWord & 0x33333333) + ((uWord>>2) & 0x33333333); + uWord = (uWord & 0x0F0F0F0F) + ((uWord>>4) & 0x0F0F0F0F); + uWord = (uWord & 0x00FF00FF) + ((uWord>>8) & 0x00FF00FF); + return (uWord & 0x0000FFFF) + (uWord>>16); +} + +/**Function************************************************************* + + Synopsis [Compute the cost of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_CutFindValue( Dar_Man_t * p, Dar_Cut_t * pCut ) +{ + Aig_Obj_t * pLeaf; + int i, Value, nOnes; + assert( pCut->fUsed ); + Value = 0; + nOnes = 0; + Dar_CutForEachLeaf( p->pAig, pCut, pLeaf, i ) + { + if ( pLeaf == NULL ) + return 0; + assert( pLeaf != NULL ); + Value += pLeaf->nRefs; + nOnes += (pLeaf->nRefs == 1); + } + if ( pCut->nLeaves < 2 ) + return 1001; +// Value = Value * 100 / pCut->nLeaves; + if ( Value > 1000 ) + Value = 1000; + if ( nOnes > 3 ) + Value = 5 - nOnes; + return Value; +} + +/**Function************************************************************* + + Synopsis [Returns the next free cut to use.] + + Description [Uses the cut with the smallest value.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dar_Cut_t * Dar_CutFindFree( Dar_Man_t * p, Aig_Obj_t * pObj ) +{ + Dar_Cut_t * pCut, * pCutMax; + int i; + pCutMax = NULL; + Dar_ObjForEachCutAll( pObj, pCut, i ) + { + if ( pCut->fUsed == 0 ) + return pCut; + if ( pCut->nLeaves < 3 ) + continue; + if ( pCutMax == NULL || pCutMax->Value > pCut->Value ) + pCutMax = pCut; + } + if ( pCutMax == NULL ) + { + Dar_ObjForEachCutAll( pObj, pCut, i ) + { + if ( pCut->nLeaves < 2 ) + continue; + if ( pCutMax == NULL || pCutMax->Value > pCut->Value ) + pCutMax = pCut; + } + } + if ( pCutMax == NULL ) + { + Dar_ObjForEachCutAll( pObj, pCut, i ) + { + if ( pCutMax == NULL || pCutMax->Value > pCut->Value ) + pCutMax = pCut; + } + } + assert( pCutMax != NULL ); + pCutMax->fUsed = 0; + return pCutMax; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pDom is contained in pCut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_CutCheckDominance( Dar_Cut_t * pDom, Dar_Cut_t * pCut ) +{ + int i, k; + assert( pDom->fUsed && pCut->fUsed ); + for ( i = 0; i < (int)pDom->nLeaves; i++ ) + { + for ( k = 0; k < (int)pCut->nLeaves; k++ ) + if ( pDom->pLeaves[i] == pCut->pLeaves[k] ) + break; + if ( k == (int)pCut->nLeaves ) // node i in pDom is not contained in pCut + return 0; + } + // every node in pDom is contained in pCut + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the cut is contained.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_CutFilter( Aig_Obj_t * pObj, Dar_Cut_t * pCut ) +{ + Dar_Cut_t * pTemp; + int i; + assert( pCut->fUsed ); + // go through the cuts of the node + Dar_ObjForEachCut( pObj, pTemp, i ) + { + if ( pTemp == pCut ) + continue; + if ( pTemp->nLeaves > pCut->nLeaves ) + { + // skip the non-contained cuts + if ( (pTemp->uSign & pCut->uSign) != pCut->uSign ) + continue; + // check containment seriously + if ( Dar_CutCheckDominance( pCut, pTemp ) ) + { + // remove contained cut + pTemp->fUsed = 0; + } + } + else + { + // skip the non-contained cuts + if ( (pTemp->uSign & pCut->uSign) != pTemp->uSign ) + continue; + // check containment seriously + if ( Dar_CutCheckDominance( pTemp, pCut ) ) + { + // remove the given cut + pCut->fUsed = 0; + return 1; + } + } + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Merges two cuts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_CutMergeOrdered( Dar_Cut_t * pC, Dar_Cut_t * pC0, Dar_Cut_t * pC1 ) +{ + int i, k, c; + assert( pC0->nLeaves >= pC1->nLeaves ); + + // the case of the largest cut sizes + if ( pC0->nLeaves == 4 && pC1->nLeaves == 4 ) + { + if ( pC0->uSign != pC1->uSign ) + return 0; + for ( i = 0; i < (int)pC0->nLeaves; i++ ) + if ( pC0->pLeaves[i] != pC1->pLeaves[i] ) + return 0; + for ( i = 0; i < (int)pC0->nLeaves; i++ ) + pC->pLeaves[i] = pC0->pLeaves[i]; + pC->nLeaves = pC0->nLeaves; + return 1; + } + + // the case when one of the cuts is the largest + if ( pC0->nLeaves == 4 ) + { + if ( (pC0->uSign & pC1->uSign) != pC1->uSign ) + return 0; + for ( i = 0; i < (int)pC1->nLeaves; i++ ) + { + for ( k = (int)pC0->nLeaves - 1; k >= 0; k-- ) + if ( pC0->pLeaves[k] == pC1->pLeaves[i] ) + break; + if ( k == -1 ) // did not find + return 0; + } + for ( i = 0; i < (int)pC0->nLeaves; i++ ) + pC->pLeaves[i] = pC0->pLeaves[i]; + pC->nLeaves = pC0->nLeaves; + return 1; + } + + // compare two cuts with different numbers + i = k = 0; + for ( c = 0; c < 4; c++ ) + { + if ( k == (int)pC1->nLeaves ) + { + if ( i == (int)pC0->nLeaves ) + { + pC->nLeaves = c; + return 1; + } + pC->pLeaves[c] = pC0->pLeaves[i++]; + continue; + } + if ( i == (int)pC0->nLeaves ) + { + if ( k == (int)pC1->nLeaves ) + { + pC->nLeaves = c; + return 1; + } + pC->pLeaves[c] = pC1->pLeaves[k++]; + continue; + } + if ( pC0->pLeaves[i] < pC1->pLeaves[k] ) + { + pC->pLeaves[c] = pC0->pLeaves[i++]; + continue; + } + if ( pC0->pLeaves[i] > pC1->pLeaves[k] ) + { + pC->pLeaves[c] = pC1->pLeaves[k++]; + continue; + } + pC->pLeaves[c] = pC0->pLeaves[i++]; + k++; + } + if ( i < (int)pC0->nLeaves || k < (int)pC1->nLeaves ) + return 0; + pC->nLeaves = c; + return 1; +} + +/**Function************************************************************* + + Synopsis [Prepares the object for FPGA mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_CutMerge( Dar_Cut_t * pCut, Dar_Cut_t * pCut0, Dar_Cut_t * pCut1 ) +{ + assert( !pCut->fUsed ); + // merge the nodes + if ( pCut0->nLeaves <= pCut1->nLeaves ) + { + if ( !Dar_CutMergeOrdered( pCut, pCut1, pCut0 ) ) + return 0; + } + else + { + if ( !Dar_CutMergeOrdered( pCut, pCut0, pCut1 ) ) + return 0; + } + pCut->uSign = pCut0->uSign | pCut1->uSign; + pCut->fUsed = 1; + return 1; +} + + +/**Function************************************************************* + + Synopsis [Computes the stretching phase of the cut w.r.t. the merged cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dar_CutTruthPhase( Dar_Cut_t * pCut, Dar_Cut_t * pCut1 ) +{ + unsigned uPhase = 0; + int i, k; + for ( i = k = 0; i < (int)pCut->nLeaves; i++ ) + { + if ( k == (int)pCut1->nLeaves ) + break; + if ( pCut->pLeaves[i] < pCut1->pLeaves[k] ) + continue; + assert( pCut->pLeaves[i] == pCut1->pLeaves[k] ); + uPhase |= (1 << i); + k++; + } + return uPhase; +} + +/**Function************************************************************* + + Synopsis [Swaps two advancent variables of the truth table.] + + Description [Swaps variable iVar and iVar+1.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dar_CutTruthSwapAdjacentVars( unsigned uTruth, int iVar ) +{ + assert( iVar >= 0 && iVar <= 2 ); + if ( iVar == 0 ) + return (uTruth & 0x99999999) | ((uTruth & 0x22222222) << 1) | ((uTruth & 0x44444444) >> 1); + if ( iVar == 1 ) + return (uTruth & 0xC3C3C3C3) | ((uTruth & 0x0C0C0C0C) << 2) | ((uTruth & 0x30303030) >> 2); + if ( iVar == 2 ) + return (uTruth & 0xF00FF00F) | ((uTruth & 0x00F000F0) << 4) | ((uTruth & 0x0F000F00) >> 4); + assert( 0 ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Expands the truth table according to the phase.] + + Description [The input and output truth tables are in pIn/pOut. The current number + of variables is nVars. The total number of variables in nVarsAll. The last argument + (Phase) contains shows where the variables should go.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dar_CutTruthStretch( unsigned uTruth, int nVars, unsigned Phase ) +{ + int i, k, Var = nVars - 1; + for ( i = 3; i >= 0; i-- ) + if ( Phase & (1 << i) ) + { + for ( k = Var; k < i; k++ ) + uTruth = Dar_CutTruthSwapAdjacentVars( uTruth, k ); + Var--; + } + assert( Var == -1 ); + return uTruth; +} + +/**Function************************************************************* + + Synopsis [Shrinks the truth table according to the phase.] + + Description [The input and output truth tables are in pIn/pOut. The current number + of variables is nVars. The total number of variables in nVarsAll. The last argument + (Phase) contains shows what variables should remain.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dar_CutTruthShrink( unsigned uTruth, int nVars, unsigned Phase ) +{ + int i, k, Var = 0; + for ( i = 0; i < 4; i++ ) + if ( Phase & (1 << i) ) + { + for ( k = i-1; k >= Var; k-- ) + uTruth = Dar_CutTruthSwapAdjacentVars( uTruth, k ); + Var++; + } + return uTruth; +} + +/**Function************************************************************* + + Synopsis [Performs truth table computation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dar_CutTruth( Dar_Cut_t * pCut, Dar_Cut_t * pCut0, Dar_Cut_t * pCut1, int fCompl0, int fCompl1 ) +{ + unsigned uTruth0 = fCompl0 ? ~pCut0->uTruth : pCut0->uTruth; + unsigned uTruth1 = fCompl1 ? ~pCut1->uTruth : pCut1->uTruth; + uTruth0 = Dar_CutTruthStretch( uTruth0, pCut0->nLeaves, Dar_CutTruthPhase(pCut, pCut0) ); + uTruth1 = Dar_CutTruthStretch( uTruth1, pCut1->nLeaves, Dar_CutTruthPhase(pCut, pCut1) ); + return uTruth0 & uTruth1; +} + +/**Function************************************************************* + + Synopsis [Minimize support of the cut.] + + Description [Returns 1 if the node's support has changed] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dar_CutSuppMinimize( Dar_Cut_t * pCut ) +{ + unsigned uMasks[4][2] = { + { 0x5555, 0xAAAA }, + { 0x3333, 0xCCCC }, + { 0x0F0F, 0xF0F0 }, + { 0x00FF, 0xFF00 } + }; + unsigned uPhase = 0, uTruth = 0xFFFF & pCut->uTruth; + int i, k, nLeaves; + assert( pCut->fUsed ); + // compute the truth support of the cut's function + nLeaves = pCut->nLeaves; + for ( i = 0; i < (int)pCut->nLeaves; i++ ) + if ( (uTruth & uMasks[i][0]) == ((uTruth & uMasks[i][1]) >> (1 << i)) ) + nLeaves--; + else + uPhase |= (1 << i); + if ( nLeaves == (int)pCut->nLeaves ) + return 0; + // shrink the truth table + uTruth = Dar_CutTruthShrink( uTruth, pCut->nLeaves, uPhase ); + pCut->uTruth = 0xFFFF & uTruth; + // update leaves and signature + pCut->uSign = 0; + for ( i = k = 0; i < (int)pCut->nLeaves; i++ ) + { + if ( !(uPhase & (1 << i)) ) + continue; + pCut->pLeaves[k++] = pCut->pLeaves[i]; + pCut->uSign |= Aig_ObjCutSign( pCut->pLeaves[i] ); + } + assert( k == nLeaves ); + pCut->nLeaves = nLeaves; + return 1; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManCutsFree( Dar_Man_t * p ) +{ + if ( p->pMemCuts == NULL ) + return; + Aig_MmFixedStop( p->pMemCuts, 0 ); + p->pMemCuts = NULL; +// Aig_ManCleanData( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Cut_t * Dar_ObjPrepareCuts( Dar_Man_t * p, Aig_Obj_t * pObj ) +{ + Dar_Cut_t * pCutSet, * pCut; + int i; + assert( Dar_ObjCuts(pObj) == NULL ); + pObj->nCuts = p->pPars->nCutsMax; + // create the cutset of the node + pCutSet = (Dar_Cut_t *)Aig_MmFixedEntryFetch( p->pMemCuts ); + Dar_ObjSetCuts( pObj, pCutSet ); + Dar_ObjForEachCut( pObj, pCut, i ) + pCut->fUsed = 0; + // add unit cut if needed + pCut = pCutSet; + pCut->fUsed = 1; + if ( Aig_ObjIsConst1(pObj) ) + { + pCut->nLeaves = 0; + pCut->uSign = 0; + pCut->uTruth = 0xFFFF; + } + else + { + pCut->nLeaves = 1; + pCut->pLeaves[0] = pObj->Id; + pCut->uSign = Aig_ObjCutSign( pObj->Id ); + pCut->uTruth = 0xAAAA; + } + pCut->Value = Dar_CutFindValue( p, pCut ); + return pCutSet; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManCutsStart( Dar_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManCleanData( p->pAig ); + Aig_MmFixedRestart( p->pMemCuts ); + Dar_ObjPrepareCuts( p, Aig_ManConst1(p->pAig) ); + Aig_ManForEachPi( p->pAig, pObj, i ) + Dar_ObjPrepareCuts( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Cut_t * Dar_ObjComputeCuts( Dar_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pFanin0 = Aig_ObjReal_rec( Aig_ObjChild0(pObj) ); + Aig_Obj_t * pFanin1 = Aig_ObjReal_rec( Aig_ObjChild1(pObj) ); + Aig_Obj_t * pFaninR0 = Aig_Regular(pFanin0); + Aig_Obj_t * pFaninR1 = Aig_Regular(pFanin1); + Dar_Cut_t * pCutSet, * pCut0, * pCut1, * pCut; + int i, k, RetValue; + + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsNode(pObj) ); + assert( Dar_ObjCuts(pObj) == NULL ); + assert( Dar_ObjCuts(pFaninR0) != NULL ); + assert( Dar_ObjCuts(pFaninR1) != NULL ); + + // set up the first cut + pCutSet = Dar_ObjPrepareCuts( p, pObj ); + // make sure fanins cuts are computed + Dar_ObjForEachCut( pFaninR0, pCut0, i ) + Dar_ObjForEachCut( pFaninR1, pCut1, k ) + { + p->nCutsAll++; + // make sure K-feasible cut exists + if ( Dar_WordCountOnes(pCut0->uSign | pCut1->uSign) > 4 ) + continue; + // get the next cut of this node + pCut = Dar_CutFindFree( p, pObj ); + // create the new cut + if ( !Dar_CutMerge( pCut, pCut0, pCut1 ) ) + { + assert( !pCut->fUsed ); + continue; + } + p->nCutsTried++; + // check dominance + if ( Dar_CutFilter( pObj, pCut ) ) + { + assert( !pCut->fUsed ); + continue; + } + // compute truth table + pCut->uTruth = 0xFFFF & Dar_CutTruth( pCut, pCut0, pCut1, Aig_IsComplement(pFanin0), Aig_IsComplement(pFanin1) ); + + // minimize support of the cut + if ( Dar_CutSuppMinimize( pCut ) ) + { + RetValue = Dar_CutFilter( pObj, pCut ); + assert( !RetValue ); + } + + // assign the value of the cut + pCut->Value = Dar_CutFindValue( p, pCut ); + // if the cut contains removed node, do not use it + if ( pCut->Value == 0 ) + { + p->nCutsSkipped++; + pCut->fUsed = 0; + } + else if ( pCut->nLeaves < 2 ) + return pCutSet; + } + // count the number of nontrivial cuts cuts + Dar_ObjForEachCut( pObj, pCut, i ) + p->nCutsUsed += pCut->fUsed; + // discount trivial cut + p->nCutsUsed--; + return pCutSet; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Cut_t * Dar_ObjComputeCuts_rec( Dar_Man_t * p, Aig_Obj_t * pObj ) +{ + if ( Dar_ObjCuts(pObj) ) + return Dar_ObjCuts(pObj); + if ( Aig_ObjIsBuf(pObj) ) + return Dar_ObjComputeCuts_rec( p, Aig_ObjFanin0(pObj) ); + Dar_ObjComputeCuts_rec( p, Aig_ObjFanin0(pObj) ); + Dar_ObjComputeCuts_rec( p, Aig_ObjFanin1(pObj) ); + return Dar_ObjComputeCuts( p, pObj ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darData.c b/src/aig/dar/darData.c new file mode 100644 index 00000000..cb403b8a --- /dev/null +++ b/src/aig/dar/darData.c @@ -0,0 +1,11287 @@ +/**CFile**************************************************************** + + FileName [dar_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Storage for AIG subgraph data.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: dar_.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +const int s_nDataSize1 = 2*43906; +unsigned int s_Data1[2*43906] = { + 4, 6, 5, 7, 9, 11, 5, 6, 4, 7, 15, 17, + 2, 8, 4, 21, 3, 10, 5, 25, 7, 25, 9, 25, + 2, 10, 7, 33, 9, 33, 2, 14, 5, 39, 6, 39, + 17, 39, 3, 16, 7, 47, 33, 47, 2, 16, 4, 53, + 7, 53, 3, 14, 5, 59, 17, 59, 53, 59, 3, 11, + 7, 67, 4, 68, 5, 66, 6, 73, 33, 67, 7, 76, + 5, 77, 9, 77, 9, 66, 33, 85, 3, 9, 4, 88, + 7, 91, 88, 93, 6, 88, 21, 89, 11, 89, 21, 100, + 25, 101, 11, 88, 7, 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483, 257, 483, 9, 540, 155, 483, 17, 545, + 235, 483, 181, 483, 161, 483, 4, 482, 2, 555, 5, 482, + 2, 559, 6, 559, 17, 559, 5, 483, 2, 567, 6, 566, + 241, 567, 483, 573, 9, 573, 9, 567, 4, 483, 6, 581, + 3, 582, 3, 7, 289, 587, 510, 587, 11, 591, 11, 590, + 516, 587, 413, 587, 483, 598, 498, 587, 500, 587, 19, 587, + 483, 606, 502, 587, 12, 587, 483, 612, 534, 587, 524, 587, + 9, 618, 288, 587, 305, 623, 25, 623, 11, 587, 265, 629, + 331, 631, 510, 628, 9, 628, 483, 636, 483, 628, 9, 640, + 265, 628, 305, 645, 25, 645, 375, 628, 265, 587, 11, 653, + 33, 655, 11, 652, 25, 659, 305, 659, 295, 587, 241, 587, + 9, 587, 4, 668, 2, 671, 3, 668, 5, 675, 524, 668, + 483, 668, 11, 681, 11, 680, 11, 668, 483, 686, 392, 587, + 165, 587, 375, 587, 17, 695, 11, 695, 11, 694, 113, 587, + 567, 587, 305, 705, 25, 705, 555, 704, 5, 586, 3, 713, + 7, 713, 623, 713, 645, 713, 659, 713, 128, 713, 394, 713, + 101, 713, 299, 713, 705, 713, 510, 713, 483, 713, 9, 736, + 9, 713, 113, 740, 483, 740, 241, 713, 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5,85844, 9,85863,77751,85664, + 375,85867,79986,80533, 375,85871, 2,80533,80080,85875,80079,85877, +80298,85875,80319,85881,80293,85875, 4,85884,80319,85887, 4,85885, +80301,85891,11727,85875,11047,85875,17787,85875,18737,85875,78670,85875, +77859,85903,10874,85875,77952,85875,77857,85909, 7,85874,83903,85913, +85167,85875,85355,85875,85213,85875, 1216,85875,77751,85923,77877,85925, +77751,85922,77857,85929,62310,85875,64483,85875,68896,85875,62464,85875, +61780,85875,61688,85875,85159,85875,10831,85875, 9,85946, 413,85875, +77751,85951,77837,85953,77751,85950,77859,85957,74571,85875,17178,85875, +50959,85875,43400,85875,11177,85875,84077,85875,85913,85971,40675,85875, +55546,85875,54440,85875,69196,85875,17125,85875, 9,85982,15029,85875, +65869,85986,52169,85875,49155,85875,40453,85875,43305,85875,40005,85875, +84767,85875,77751,86001, 9,86003,73994,85875,42613,85874,42795,86009, +10291,85874,36131,86013,70135,85875,53919,85875,10195,85875,79842,85875, +79757,85875, 903,86024,63493,85875, 8861,85875,80058,85875,80079,86033, +54422,85875,11529,85875,54447,85875,52601,85875, 145,85875,35187,86044, +36096,85875,79601,85875,79549,85874,80501,86053,79719,86053,64396,85875, +85111,86059, 1011,85875,43215,86062, 241,85875,54295,86066,65869,85875, +60857,86070,15029,86070, 9,85875,10831,86076,60857,86076,17125,86076, +84076,85875, 483,86085, 803,85875,60857,86088, 903,85875,53813,86093, +60857,86092,10107,86093,69877,86093,79757,86092,71229,86092, 265,85875, +55211,86106,10371,85875,42787,85875,55211,85875,60857,86114, 265,86114, +38305,85874,46169,86121,80531,86121,72818,85875, 11,85875,43215,86128, +43316,85875,35187,85875,54295,86134, 145,86134,71229,85875, 903,86140, + 155,86140,43215,85875, 10,86147, 10,86146,85111,86147, 1011,86146, +84767,86147, 11,86147,86151,86159, 11,86146,86149,86163, 155,85875, +71229,86166, 5,85874,55211,86171,64345,86171,84132,86171,36256,86171, +83903,86171, 9,86180, 9,86171,83903,86184,35187,86184,35187,86171, + 9,86190, 4,85875,80070,86195,80077,86197,80293,86195,80315,86201, +80293,86194,80319,86205, 483,86195,83903,86209,80533,86194, 3,86213, + 7,86195,86215,86217, 2,86217,86213,86221,79987,86194,80079,86225, +83903,86194, 483,86229,77751,86195,79545,86233, 3,86235, 2,86234, +86237,86239, 2,86235, 3,86234,86243,86245,77751,86194,79549,86249, + 3,86251, 2,86250,86253,86255, 2,86251, 3,86250,86259,86261, + 5,85875,85914,86265,85913,86265,83903,86268,49713,86265,49712,86264, +86273,86275,49712,86265,49713,86264,86279,86281,53813,86265,64317,86265, +64815,86265,62077,86265,10107,86265,69877,86265, 17,86265,83903,86297, +35187,86297,60857,86264,85111,86303,65869,86265, 9,86307, 587,86265, +60857,86311,83903,86265,85913,86314,79757,85874,79987,86319, 4,86321, + 5,86320,86323,86325, 5,86321, 4,86320,86329,86331,80336,85875, +79549,86335, 3,86337, 2,86336,86339,86341, 2,86337, 3,86336, +86345,86347,83903,85875, 16,86351, 7,86351,86265,86355, 4,86354, + 4,86355, 17,86351, 4,86351, 7,86364, 5,86351,86361,86369, + 4,86350,86363,86373, 483,86373, 5,86350,86359,86379,86367,86379, +86355,86379,86353,86379,54295,85875, 241,86388,35187,86388,60857,85875, + 7,86395, 4,86396, 4,86397,86265,86397, 16,86395, 17,86395, + 803,86394,55211,86394, 903,86394,65869,86394, 9,86394, 4,86394, +86407,86419, 5,86394,86399,86423,86405,86423,85111,86423, 4,86395, + 7,86430,86423,86433, 5,86395,86401,86437,77751,85875, 413,86440, +77859,86443, 413,86441,77949,86447, 1216,86440,77857,86451, 1216,86441, +78669,86455, 4,86441,79757,86459, 3,86461, 2,86460,86463,86465, + 2,86461, 3,86460,86469,86471, 4,86440,79549,86475, 3,86477, + 2,86476,86479,86481, 2,86477, 3,86476,86485,86487,79987,85875, +80244,86491,80245,86491,80151,86491, 5,86496, 5,86497, 4,86491, +80083,86503,80029,86503,80063,86503,86501,86503, 5,86491,80151,86512, + 4,86490,80079,86517,86513,86517,86493,86517,86515,86517,86499,86517, + 5,86490,86495,86529,86503,86529,77751,85874,86529,86535,86503,86536, +86532,86535,86521,86535,86512,86535,86517,86545,86503,86535,86529,86548, +86491,86535, 5,86552,86517,86555, 5,86553,86503,86559,85663,86535, +85100,86535, 9,86535,84767,86566,84767,86535, 9,86570, 5,86535, +86491,86574,86517,86577,86491,86575,86529,86581,80150,80533,80315,86585, +80301,86586,80298,86585,80319,86591,80301,86585,80315,86594,80316,86585, +80325,86585,80293,86585, 4,86602,80319,86605, 4,86603,80301,86609, +85663,86585,85100,86585, 9,86585,84767,86616,84767,86585, 9,86620, + 4,86585,80293,86625,80315,86627,80293,86624,80319,86631, 4,80533, +79968,86635,79967,86637,80498,86635,80519,86641,80497,86635, 2,86644, +80519,86647, 2,86645,80501,86651,78670,86635,77859,86655,77952,86635, +77857,86659, 0,86635,21605,86663, 587,86665, 7,86635, 483,86669, +18967,86671, 0,86634,19917,86675,58930,86675,86673,86675,56555,86675, + 587,86682, 587,86675,56555,86686, 7,86634,58931,86691,86675,86693, +86677,86691,86679,86691,19916,86691,86675,86701,86265,86691,86667,86691, +86689,86691,86685,86691, 1275,86691,18967,86712,86675,86715,18967,86691, + 1275,86718,86675,86721,29023,86635,25513,86635,24619,86635,84363,86635, +84723,86635,84471,86635, 1216,86635,77751,86737,77877,86739,77751,86736, +77857,86743,63610,86635,63291,86635,84321,86635,86028,86635,86030,86635, +85960,86635,86437,86635,76631,86635,76601,86635,74682,86635, 8974,86635, + 413,86635,77751,86769,77837,86771,77751,86768,77859,86775,63493,86635, + 483,86778,85875,86778,29598,86635,25545,86635,59206,86635,15029,86635, +56555,86790,62942,86635,80030,86635,79987,86635, 1011,86798,74571,86635, +85875,86802, 483,86802, 8861,86635,85875,86808, 483,86808,79926,86635, +79967,86815,85875,86635, 8861,86818,63493,86818,74571,86818,79263,86635, +76816,86635,77387,86829,76500,86635,84185,86833, 11,86833, 903,86635, +28715,86838,56555,86635,15029,86842, 483,86635,63493,86846,74571,86846, + 8861,86846, 1011,86635,79987,86854,60857,86854,10073,86635,27855,86635, +62278,86635, 587,86635,28715,86866,29026,86635,60857,86635, 1011,86872, + 1347,86872,28715,86635, 11,86879,84185,86879, 903,86878, 587,86878, + 1347,86635,60857,86888, 2,86634, 4,86893, 7,86895, 3,86634, +85125,86899,37663,86899, 2,86635,79962,86905,79965,86907,80497,86905, +80515,86911,80497,86904,80519,86915,79757,86904,79967,86919,71229,86904, +77387,86923,77751,86905,79065,86927, 5,86929, 4,86928,86931,86933, + 4,86929, 5,86928,86937,86939,77751,86904,79139,86943, 5,86945, + 4,86944,86947,86949, 4,86945, 5,86944,86953,86955, 3,86635, +85217,86959,85121,86959,86897,86959,86217,86959,85133,86959, 6,86959, + 6,86958, 7,86958,86971,86975, 7,86959,86973,86979,60755,86959, +35927,86959,38155,86959,37611,86959,71229,86958,84185,86991, 11,86991, +79987,86634,79757,86997, 2,86999, 3,86998,87001,87003, 3,86999, + 2,86998,87007,87009,80150,86635,79139,87013, 5,87015, 4,87014, +87017,87019, 4,87015, 5,87014,87023,87025,84767,86635, 1368,87029, + 7,87029, 2,87032, 2,87033, 1369,87029, 2,87029, 7,87040, + 3,87029,87037,87045, 2,87028,87039,87049, 3,87028,87035,87053, +87043,87053,87031,87053,71229,86635, 7,87061, 2,87062, 2,87063, + 1368,87061, 1369,87061, 2,87060,77387,87073,87071,87073, 3,87060, +87065,87079,87069,87079,84185,87079, 11,87079, 2,87061,77373,87089, +76635,87089, 7,87088,87079,87095,72519,87089, 3,87061,87067,87101, +85875,87101,77751,86635, 413,87106,77859,87109, 413,87107,77949,87113, + 1216,87106,77857,87117, 1216,87107,78669,87121, 2,87107,79987,87125, + 5,87127, 4,87126,87129,87131, 4,87127, 5,87126,87135,87137, + 2,87106,79139,87141, 5,87143, 4,87142,87145,87147, 4,87143, + 5,87142,87151,87153,79757,86635,80450,87157,80451,87157,80337,87157, + 3,87162, 3,87163, 2,87157,79971,87169,79841,87169,79961,87169, +87167,87169, 3,87157,80337,87178, 2,87156,79967,87183,87179,87183, +87159,87183,87181,87183,87165,87183, 3,87156,87161,87195,87169,87195, +77751,86634,87195,87201,87169,87202,87198,87201,87187,87201,87178,87201, +87183,87211,87169,87201,87195,87214,87157,87201, 3,87218,87183,87221, + 3,87219,87169,87225, 3,87201,87157,87228,87183,87231,87157,87229, +87195,87235,80336,80533,80515,87239,80501,87240,80498,87239,80519,87245, +80501,87239,80515,87248,80516,87239,80525,87239,80497,87239, 2,87256, +80519,87259, 2,87257,80501,87263, 2,87239,80497,87267,80515,87269, +80497,87266,80519,87273,77751,80533,79962,87277, 2,87279,79971,87281, + 2,87278,79967,87285,80070,87277, 4,87289,80083,87291, 4,87288, +80079,87295,79968,87277,79967,87299,80080,87277,80079,87303,80498,87277, +80519,87307,80298,87277,80319,87311,80497,87277, 2,87314,80519,87317, + 2,87315,80501,87321,80293,87277, 4,87324,80319,87327, 4,87325, +80301,87331,81857,87277,78453,87277,80233,87277,80445,87277, 8453,87277, + 273,87277,84484,87277,85230,87277,84531,87277,85277,87277,21522,87277, + 1516,87277,38266,87277, 948,87277,20239,87277, 1477,87277,37095,87277, + 281,87277,84473,87277, 1011,87370,85215,87277, 903,87374,80242,87277, +80448,87277,80447,87277, 903,87382,80241,87277, 1011,87386,38057,87277, + 903,87390, 165,87277, 903,87394,21315,87277, 1011,87398, 1505,87277, + 1011,87402, 1216,87276, 412,87276, 413,87277,87409,87411, 1217,87277, +87407,87415, 413,87276, 1216,87277, 1217,87276,87421,87423, 412,87277, +87419,87427,12377,87277, 375,87277,57522,87277,67028,87277,67800,87277, + 510,87277, 240,87277, 265,87443,77750,87445,77751,87444,87447,87449, +77751,87445,77750,87444,87453,87455, 264,87277,84517,87459,85263,87459, +81749,87459, 341,87459, 264,87276, 375,87469, 241,87277,81464,87472, +81465,87473,87475,87477,81464,87473,81465,87472,87481,87483, 1011,87277, +84473,87486,80241,87486, 1505,87486,21315,87486, 903,87277,85215,87496, +80447,87496, 165,87496,38057,87496, 483,87277,65869,87506, 9,87506, + 9,87277,56555,87512, 483,87512,56555,87277, 9,87518,65869,87518, +65869,87277, 483,87524,56555,87524, 5,87277,84185,87531, 1011,87533, + 2,87531,80532,87536, 3,87531,85215,87541, 3,87530,87539,87545, +85263,87545,84517,87545,81749,87545, 2,87530,87533,87555, 4,87276, +87531,87559, 2,87561, 3,87561, 2,87560,87565,87567, 3,87560, +87563,87571, 3,87277,85111,87575, 903,87577,87559,87575, 0,87581, + 1,87580,87583,87585, 1,87581, 0,87580,87589,87591, 4,87575, +80532,87594, 5,87575,84473,87599, 5,87574,87597,87603,84517,87603, +85263,87603,81749,87603, 4,87574,87577,87613, 2,87276,85663,87617, +85100,87617, 9,87617,84767,87622,84767,87617, 9,87626,87575,87617, + 4,87631, 5,87631, 4,87630,87635,87637, 5,87630,87633,87641, + 2,87277,79962,87645,79965,87647,80497,87645,80515,87651,80497,87644, +80519,87655,79962,87644,79967,87659,87559,87645, 7,87663, 6,87662, +87665,87667, 6,87663, 7,87662,87671,87673, 4,87645, 1011,87677, +77751,87679,77750,87678,87681,87683,77750,87679,77751,87678,87687,87689, + 4,87644, 265,87693,77750,87695,77751,87694,87697,87699,77751,87695, +77750,87694,87703,87705, 3,87276, 375,87709,87645,87709, 4,87713, + 5,87713, 4,87712,87717,87719, 5,87712,87715,87723, 4,87277, +80070,87727,80077,87729,80293,87727,80315,87733,80293,87726,80319,87737, +80070,87726,80079,87741, 2,87727, 903,87745,77751,87747,77750,87746, +87749,87751,77750,87747,77751,87746,87755,87757, 2,87726, 265,87761, +77750,87763,77751,87762,87765,87767,77751,87763,77750,87762,87771,87773, + 5,87276,87575,87777, 7,87779, 6,87778,87781,87783, 6,87779, + 7,87778,87787,87789,87645,87777, 0,87793, 1,87792,87795,87797, + 1,87793, 0,87792,87801,87803,87727,87777, 2,87807, 3,87807, + 2,87806,87811,87813, 3,87806,87809,87817 +}; + +const int s_nDataSize2 = 24772; +unsigned int s_Data2[24772] = { + 3, 9, 5, 6, 119, 796, 636, 113, 449, 235, 239, 105, + 789, 96, 439, 624, 630, 230, 111, 110, 787, 786, 628, 627, + 116, 115, 436, 435, 227, 226, 93, 92, 792, 791, 100, 99, + 443, 442, 633, 632, 128, 183, 234, 178, 233, 85, 762, 203, + 32, 742, 356, 169, 152, 12, 672, 741, 127, 168, 671, 740, + 50, 352, 149, 64, 414, 197, 276, 751, 722, 396, 275, 434, + 721, 785, 274, 795, 720, 448, 273, 719, 474, 758, 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2249,13954,21398, 2213,13948,21396, 2229,13112,20711, 6735, +13940,15265,21943,15066,21776,15085,21795,30243,35306,15560,22130, 4548, +29765,34712,29750,34697, 2378, 5130, 5127,43480,18832, 2377,35094,29986, + 2376,35090,29982,15558,22128,35091,29983, 2403,15077,21787,30235,35299, +30246,35309, 8342,13111,20710, 6777,13110,20709, 7804, 4550,13208,20827, + 4380,18680,42605, 4379,13646,18934,42986, 8312, 1778,42238,42611,13167, +20780, 4359, 7035, 5307,42741, 1710, 1626, 8327, 8326, 2375, 8340, 8325, + 7615, 7612,19074,19071,10696,10693, 4562,13166, 8224, 8659,19004,43178, +15330,21997, 8664, 8226, 2922, 2374, 8223, 8658, 5467, 955, 6059, 953, + 5464, 959, 6056, 957, 8661, 8663, 8218, 8221,14243,14242,16236,16235, +32298,32297, 8076, 6069,42820,42819, 8383,10641,19007,10640, 6755,19006, + 6754,15343,22008, 7135, 5491,42828, 2373, 8387, 8386, 7793, 7792,19130, +19129,10758,10757,19123,42907,43185,43523,42818,42906, 8672, 8675, 1503, + 6071, 5483, 1507,32302, 7134, 5490, 8080, 6089,19017,43192,43191,43528, +43190,43527,42827,42913, 8385, 7791, 7790,19128,19127,10756,10755,10651, +19016,10648, 6766,19013, 6763, 8233, 8236,42911,42825, 5497, 1549, 6093, + 1539, 5496, 1548, 6092, 1538,15069,21779,15332,21999,15083,21793,15090, +21800,15088,21798,15674,22221,15557,22127,15556,22126,15559,22129,15555, +22125,15078,21788,15080,21790,15076,21786,15554,22124,15562,22132,15553, +22123,15552,22122,15074,21784,15073,21783,15184,21867,15949,22485,15948, +22484,15988,15219,22525,21900,27872,27463,15985,15216,27869,22522,21897, +27460,27857,27448,27849,27440,25615,27633,27608,21778,15068,27834,27425, +27765,27606,15970,15201,22507,21882,27833,27424,15969,15200,27899,27898, +22541,22540,22506,21881,27490,27489,16004,16003,27832,27423,21916,21915, +15235,15234,27897,27488 +}; + + +const int s_nDataSize3 = 24772; +unsigned int s_Data3[24772] = { +//Output priorities (total = 24772): +10, 9, 12, 6, 11, 14, 4, 1, 7, 5, 2, 3, 13, 8, 0, +0, 1, 2, 219, 218, 76, 217, 216, 77, 1, 0, 74, 78, 79, 75, +70, 71, 72, 68, 73, 69, 310, 299, 296, 331, 297, 332, 114, 26, 298, +340, 330, 336, 338, 339, 62, 112, 328, 334, 329, 335, 113, 337, 327, 333, +115, 60, 27, 61, 63, 273, 215, 36, 213, 31, 35, 39, 319, 312, 320, +323, 324, 343, 157, 345, 28, 178, 32, 59, 269, 58, 309, 305, 275, 271, +308, 304, 34, 117, 181, 129, 154, 211, 30, 38, 177, 193, 55, 130, 268, +33, 303, 174, 29, 37, 119, 212, 143, 188, 66, 270, 141, 183, 194, 179, +126, 261, 190, 267, 344, 346, 272, 189, 173, 274, 51, 322, 321, 342, 315, +214, 311, 14, 57, 223, 348, 125, 176, 192, 317, 280, 314, 165, 160, 175, +326, 127, 17, 247, 172, 262, 5, 231, 99, 138, 124, 54, 301, 325, 167, +15, 43, 205, 47, 122, 147, 292, 295, 83, 106, 86, 87, 220, 131, 347, +293, 150, 209, 233, 67, 116, 148, 156, 171, 180, 191, 256, 195, 341, 128, +277, 291, 281, 289, 294, 313, 102, 46, 103, 207, 229, 236, 240, 224, 227, +249, 170, 49, 251, 258, 318, 133, 197, 278, 2, 56, 252, 265, 254, 20, +142, 151, 316, 164, 121, 162, 41, 107, 139, 203, 288, 302, 48, 52, 110, +53, 64, 4, 16, 284, 135, 307, 3, 40, 155, 202, 23, 93, 22, 92, +290, 65, 210, 50, 98, 208, 94, 123, 137, 187, 225, 7, 10, 120, 109, +263, 287, 186, 108, 152, 264, 90, 253, 96, 97, 136, 200, 118, 140, 300, +306, 185, 6, 11, 89, 259, 85, 101, 132, 196, 24, 45, 260, 244, 91, +18, 104, 232, 19, 44, 105, 184, 21, 84, 226, 250, 283, 279, 286, 158, +248, 257, 255, 80, 169, 13, 100, 81, 168, 199, 238, 9, 12, 82, 182, +201, 266, 146, 204, 230, 239, 241, 159, 221, 285, 134, 88, 242, 246, 8, +144, 222, 149, 161, 228, 237, 276, 95, 206, 282, 163, 198, 243, 235, 245, +42, 166, 25, 111, 145, 153, 234, 13, 0, 1, 8, 3, 11, 7, 9, +2, 12, 4, 6, 5, 10, 0, 61, 62, 0, 2, 3, 5, 6, 8, +15, 17, 1, 4, 7, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, +21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, +36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, +51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 63, 64, 65, 66, 67, +68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 4, 5, +2, 0, 1, 3, 7, 10, 8, 11, 6, 9, 97, 100, 22, 123, 124, +125, 98, 101, 40, 39, 66, 72, 75, 69, 68, 74, 21, 41, 67, 73, +77, 30, 71, 23, 106, 36, 54, 55, 63, 96, 32, 99, 58, 59, 65, +38, 107, 27, 17, 56, 57, 64, 70, 76, 29, 15, 31, 122, 102, 25, +48, 49, 50, 51, 52, 53, 26, 28, 103, 37, 127, 104, 120, 121, 24, +33, 46, 47, 62, 112, 113, 116, 105, 20, 13, 126, 128, 35, 34, 19, +42, 43, 44, 45, 60, 61, 18, 79, 84, 91, 16, 14, 82, 89, 94, +85, 119, 83, 88, 95, 118, 78, 90, 81, 86, 93, 12, 80, 87, 92, +108, 109, 110, 111, 114, 115, 117, 148, 542, 149, 147, 303, 531, 555, 573, +574, 532, 556, 150, 153, 155, 578, 304, 560, 536, 151, 154, 157, 534, 558, +576, 533, 538, 557, 575, 547, 551, 570, 305, 568, 306, 540, 541, 544, 546, +550, 553, 562, 564, 565, 571, 552, 554, 572, 535, 559, 577, 537, 561, 569, +539, 543, 545, 548, 549, 563, 566, 567, 308, 307, 152, 156, 158, 382, 144, +128, 145, 438, 446, 450, 458, 462, 470, 474, 482, 492, 500, 504, 510, 516, +522, 530, 204, 394, 528, 381, 397, 480, 498, 396, 400, 436, 444, 448, 456, +460, 468, 472, 490, 502, 508, 514, 520, 286, 388, 393, 294, 403, 273, 384, +385, 387, 391, 399, 408, 313, 317, 347, 354, 414, 419, 426, 25, 88, 127, +130, 198, 275, 336, 483, 126, 281, 283, 341, 432, 299, 325, 390, 402, 415, +416, 417, 418, 427, 428, 116, 124, 134, 142, 221, 229, 298, 479, 486, 497, +527, 24, 87, 227, 311, 315, 329, 353, 506, 512, 518, 30, 34, 41, 196, +300, 484, 48, 104, 186, 191, 264, 335, 343, 363, 234, 276, 441, 443, 453, +455, 465, 467, 477, 495, 525, 222, 269, 476, 494, 524, 395, 89, 140, 413, +420, 425, 481, 499, 505, 511, 517, 529, 200, 257, 327, 398, 401, 440, 445, +452, 457, 464, 469, 32, 36, 42, 47, 345, 365, 435, 442, 447, 454, 459, +466, 471, 478, 489, 496, 501, 507, 513, 519, 526, 202, 323, 146, 170, 177, +179, 248, 255, 368, 380, 206, 122, 132, 258, 279, 288, 296, 349, 375, 434, +46, 114, 165, 180, 201, 219, 243, 250, 297, 405, 429, 33, 38, 43, 172, +203, 208, 346, 392, 404, 410, 485, 488, 183, 216, 261, 348, 386, 430, 20, +26, 65, 100, 131, 162, 167, 174, 182, 188, 189, 194, 210, 218, 240, 252, +260, 266, 272, 284, 360, 372, 383, 423, 12, 17, 57, 92, 99, 129, 213, +215, 230, 231, 278, 291, 293, 339, 389, 406, 411, 422, 15, 60, 62, 97, +117, 119, 135, 199, 224, 225, 236, 245, 267, 302, 321, 326, 377, 407, 102, +137, 175, 274, 431, 412, 421, 424, 173, 238, 246, 251, 253, 262, 270, 282, +366, 370, 378, 437, 439, 449, 451, 461, 463, 473, 475, 491, 493, 503, 509, +515, 521, 523, 0, 1, 81, 82, 106, 160, 168, 184, 185, 192, 193, 263, +271, 277, 322, 358, 22, 28, 31, 40, 67, 98, 103, 105, 138, 254, 316, +319, 355, 328, 10, 14, 49, 52, 59, 70, 73, 90, 112, 133, 220, 228, +232, 233, 301, 309, 314, 331, 333, 337, 344, 351, 35, 37, 44, 163, 342, +409, 433, 487, 259, 27, 29, 39, 50, 161, 164, 176, 178, 181, 187, 190, +197, 205, 239, 241, 242, 324, 332, 359, 361, 362, 371, 373, 374, 6, 7, +45, 55, 56, 75, 77, 79, 80, 108, 109, 159, 166, 169, 171, 195, 217, +237, 247, 249, 256, 265, 268, 280, 334, 340, 350, 357, 367, 369, 379, 2, +3, 9, 18, 19, 21, 23, 53, 63, 64, 66, 68, 72, 76, 83, 84, +93, 95, 96, 101, 107, 111, 120, 121, 123, 125, 139, 141, 143, 212, 244, +290, 295, 310, 312, 318, 320, 330, 338, 352, 356, 4, 5, 8, 11, 13, +51, 54, 58, 61, 69, 71, 74, 78, 85, 86, 94, 110, 113, 115, 136, +207, 209, 211, 214, 223, 226, 235, 285, 287, 289, 292, 364, 376, 16, 91, +118, 0, 3, 19, 149, 96, 20, 150, 5, 1, 6, 4, 2, 147, 93, +91, 145, 148, 95, 146, 85, 55, 66, 76, 59, 73, 81, 51, 61, 64, +54, 58, 92, 94, 63, 173, 62, 86, 65, 75, 60, 74, 82, 56, 52, +53, 57, 171, 167, 160, 159, 170, 72, 141, 162, 172, 28, 68, 29, 140, +168, 27, 70, 126, 139, 69, 163, 89, 137, 166, 71, 169, 129, 142, 164, +116, 135, 143, 90, 67, 113, 121, 165, 161, 131, 123, 125, 133, 30, 7, +138, 10, 117, 119, 11, 120, 127, 134, 130, 132, 115, 124, 114, 136, 9, +118, 33, 77, 157, 158, 8, 12, 88, 155, 156, 34, 78, 99, 97, 128, +36, 44, 87, 35, 43, 15, 13, 17, 122, 21, 23, 25, 144, 37, 45, +47, 103, 32, 42, 80, 39, 49, 83, 108, 40, 50, 84, 38, 46, 48, +31, 41, 79, 18, 98, 22, 24, 26, 14, 16, 105, 107, 100, 152, 111, +109, 104, 101, 110, 112, 106, 153, 102, 151, 154, 0, 1, 3, 4, 2, +12, 13, 10, 11, 14, 9, 6, 5, 7, 8, 21, 24, 23, 22, 20, +19, 15, 16, 17, 18, 0, 1, 3, 2, 108, 109, 139, 153, 122, 96, +178, 97, 126, 95, 101, 100, 94, 174, 140, 172, 175, 173, 5, 36, 154, +88, 83, 80, 35, 161, 151, 19, 11, 6, 147, 143, 34, 176, 123, 37, +169, 170, 171, 163, 164, 165, 166, 167, 168, 155, 156, 157, 158, 159, 160, +82, 162, 177, 152, 81, 111, 7, 12, 20, 128, 4, 93, 21, 64, 13, +148, 60, 62, 118, 10, 18, 33, 144, 30, 48, 135, 149, 86, 114, 99, +124, 129, 130, 131, 61, 63, 65, 8, 14, 16, 22, 24, 26, 28, 73, +75, 77, 90, 56, 72, 74, 76, 78, 51, 53, 55, 57, 59, 67, 69, +71, 79, 89, 91, 50, 52, 54, 58, 66, 68, 70, 92, 107, 39, 41, +43, 45, 47, 110, 103, 105, 120, 145, 127, 38, 40, 42, 44, 46, 137, +102, 104, 106, 31, 32, 49, 9, 15, 17, 23, 29, 87, 25, 27, 150, +141, 142, 84, 85, 146, 98, 116, 119, 133, 115, 121, 136, 132, 125, 117, +112, 113, 138, 134, 2, 0, 1, 3, 8, 6, 7, 4, 5, 9, 10, +0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, +15, 16, 2, 1, 4, 8, 7, 9, 6, 0, 5, 3, 10, 109, 107, +108, 97, 105, 28, 30, 21, 81, 26, 32, 106, 20, 24, 35, 22, 34, +96, 104, 62, 27, 111, 11, 18, 23, 36, 83, 37, 12, 95, 17, 46, +56, 25, 40, 42, 87, 89, 14, 16, 13, 29, 103, 82, 110, 15, 19, +31, 33, 102, 38, 66, 67, 68, 69, 70, 71, 72, 85, 41, 115, 117, +91, 93, 94, 99, 101, 43, 73, 86, 88, 114, 116, 50, 52, 74, 76, +77, 78, 79, 39, 113, 44, 45, 47, 48, 49, 51, 53, 54, 55, 57, +58, 59, 60, 61, 63, 64, 65, 75, 80, 84, 90, 92, 98, 100, 112, +0, 1, 20, 17, 18, 12, 19, 16, 21, 15, 23, 14, 22, 13, 0, +6, 5, 11, 3, 9, 2, 8, 1, 7, 4, 10, 3, 4, 11, 14, +17, 32, 0, 1, 2, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16, +18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, +34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 2, 3, 0, 1, +15, 13, 17, 21, 77, 76, 33, 30, 34, 110, 105, 114, 118, 31, 32, +35, 101, 100, 16, 131, 12, 14, 130, 135, 132, 112, 120, 116, 111, 115, +119, 79, 117, 113, 121, 20, 133, 80, 134, 78, 81, 44, 109, 49, 47, +124, 46, 28, 48, 126, 26, 87, 89, 90, 88, 6, 5, 7, 9, 11, +19, 36, 38, 40, 42, 86, 91, 18, 4, 10, 39, 8, 37, 41, 43, +45, 60, 127, 27, 61, 106, 129, 59, 108, 128, 53, 54, 57, 58, 62, +50, 29, 56, 63, 52, 55, 107, 122, 123, 125, 51, 64, 65, 66, 67, +68, 69, 70, 71, 72, 73, 74, 75, 82, 83, 84, 85, 92, 93, 94, +95, 96, 97, 98, 99, 102, 103, 104, 23, 25, 24, 22, 175, 174, 176, +162, 158, 165, 124, 166, 15, 155, 126, 160, 120, 121, 122, 123, 125, 127, +128, 129, 153, 157, 171, 152, 163, 170, 96, 97, 108, 0, 3, 6, 9, +12, 66, 69, 72, 75, 78, 81, 130, 131, 150, 151, 156, 159, 161, 168, +169, 173, 177, 154, 164, 167, 172, 1, 2, 4, 5, 7, 8, 10, 11, +13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, +29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, +44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, +59, 60, 61, 62, 63, 64, 65, 67, 68, 70, 71, 73, 74, 76, 77, +79, 80, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, +95, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 109, 110, 111, 112, +113, 114, 115, 116, 117, 118, 119, 132, 133, 134, 135, 136, 137, 138, 139, +140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 178, 179, 0, 1, 2, +8, 6, 7, 3, 5, 4, 0, 1305, 1308, 540, 545, 558, 563, 564, 569, +570, 575, 576, 581, 582, 587, 588, 593, 594, 599, 600, 605, 606, 611, 612, +617, 618, 623, 624, 629, 630, 635, 636, 641, 642, 647, 648, 653, 654, 657, +662, 663, 668, 669, 672, 677, 678, 681, 684, 687, 690, 0, 1, 2, 3, +4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, +19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, +34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, +49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, +64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, +79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, +94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, +109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, +124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, +139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, +154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, +169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, +184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, +199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, +214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, +229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, +244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, +259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, +274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, +289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, +304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, +319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, +334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, +349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, +364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, +379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389, 390, 391, 392, 393, +394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404, 405, 406, 407, 408, +409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419, 420, 421, 422, 423, +424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, +439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449, 450, 451, 452, 453, +454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, +469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, +484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494, 495, 496, 497, 498, +499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511, 512, 513, +514, 515, 516, 517, 518, 519, 520, 521, 522, 523, 524, 525, 526, 527, 528, +529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539, 541, 542, 543, 544, +546, 547, 548, 549, 550, 551, 552, 553, 554, 555, 556, 557, 559, 560, 561, +562, 565, 566, 567, 568, 571, 572, 573, 574, 577, 578, 579, 580, 583, 584, +585, 586, 589, 590, 591, 592, 595, 596, 597, 598, 601, 602, 603, 604, 607, +608, 609, 610, 613, 614, 615, 616, 619, 620, 621, 622, 625, 626, 627, 628, +631, 632, 633, 634, 637, 638, 639, 640, 643, 644, 645, 646, 649, 650, 651, +652, 655, 656, 658, 659, 660, 661, 664, 665, 666, 667, 670, 671, 673, 674, +675, 676, 679, 680, 682, 683, 685, 686, 688, 689, 691, 692, 693, 694, 695, +696, 697, 698, 699, 700, 701, 702, 703, 704, 705, 706, 707, 708, 709, 710, +711, 712, 713, 714, 715, 716, 717, 718, 719, 720, 721, 722, 723, 724, 725, +726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736, 737, 738, 739, 740, +741, 742, 743, 744, 745, 746, 747, 748, 749, 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55, 2, 14, 65, 8, 20, 64, 92, +42, 106, 11, 23, 46, 66, 34, 101, 107, 56, 35, 47, 57, 67, 76, +118, 75, 83, 82, 94, 37, 77, 29, 51, 1, 13, 27, 49, 58, 112, +39, 59, 28, 70, 44, 73, 80, 81, 32, 72, 31, 43, 33, 40, 41, +45, 60, 61, 78, 79, 90, 91 +}; + + +/**Function************************************************************* + + Synopsis [Reads library from array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Dar_LibReadNodes() +{ + Vec_Int_t * vResult; + int i; + vResult = Vec_IntAlloc( s_nDataSize1 ); + for ( i = 0; i < s_nDataSize1; i++ ) + Vec_IntPush( vResult, s_Data1[i] ); + return vResult; +} + +/**Function************************************************************* + + Synopsis [Reads library from array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Dar_LibReadOuts() +{ + Vec_Int_t * vResult; + int i; + vResult = Vec_IntAlloc( s_nDataSize2 ); + for ( i = 0; i < s_nDataSize2; i++ ) + Vec_IntPush( vResult, s_Data2[i] ); + return vResult; +} + +/**Function************************************************************* + + Synopsis [Reads library from array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Dar_LibReadPrios() +{ + Vec_Int_t * vResult; + int i; + vResult = Vec_IntAlloc( s_nDataSize3 ); + for ( i = 0; i < s_nDataSize3; i++ ) + Vec_IntPush( vResult, s_Data3[i] ); + return vResult; +} + +#if 0 + +#include "abc.h" + +/**Function************************************************************* + + Synopsis [Generate arrays.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Aig_NtkGenerateArrays( Abc_Ntk_t * pNtk ) +{ + extern int Io_WriteAigerEncode( char * pBuffer, int Pos, unsigned x ); + + Abc_Obj_t * pObj; + int i, Count = 0; + assert( Abc_NtkPiNum(pNtk) == 4 ); + assert( Abc_NtkIsStrash(pNtk) ); + assert( Abc_ObjFanoutNum(Abc_AigConst1(pNtk)) == 0 ); +/* + { + unsigned char * pBuffer; + int Pos, uLit, uLit0, uLit1, Size, Digit; + + Abc_NtkForEachPi( pNtk, pObj, i ) + pObj->pCopy = (void *)Count++; + + Pos = 0; + pBuffer = ALLOC( char, 200000 ); + Abc_AigForEachAnd( pNtk, pObj, i ) + { + pObj->pCopy = (void *)Count++; + uLit = ((int)pObj->pCopy << 1); + uLit0 = (((int)Abc_ObjFanin0(pObj)->pCopy) << 1) | Abc_ObjFaninC0(pObj); + uLit1 = (((int)Abc_ObjFanin1(pObj)->pCopy) << 1) | Abc_ObjFaninC1(pObj); + assert( uLit0 < uLit1 ); + Pos = Io_WriteAigerEncode( pBuffer, Pos, uLit - uLit1 ); + Pos = Io_WriteAigerEncode( pBuffer, Pos, uLit1 - uLit0 ); + } + // write the buffer + Size = 0; + for ( i = 0; i < Pos; i++ ) + { + if ( i % 36 == 0 ) + printf( "\n" ); + + Digit = pBuffer[i] & 0xF; + if ( Digit < 10 ) + printf( "%d", Digit ); + else + printf( "%c", Digit - 10 + 'A' ); + + + Digit = pBuffer[i]; + Digit >>= 4; + if ( Digit < 10 ) + printf( "%d", Digit ); + else + printf( "%c", Digit - 10 + 'A' ); + + } + printf( "\n" ); + printf( "Size = %d.\n", Pos ); + } +*/ + + + Abc_NtkForEachPi( pNtk, pObj, i ) + pObj->pCopy = (void *)Count++; + Abc_AigForEachAnd( pNtk, pObj, i ) + { +// if ( (Count - 4) % 6 == 0 ) +// printf( "\n" ); +// printf( "%5d,", (((int)Abc_ObjFanin0(pObj)->pCopy) << 1) | Abc_ObjFaninC0(pObj) ); +// printf( "%5d,", (((int)Abc_ObjFanin1(pObj)->pCopy) << 1) | Abc_ObjFaninC1(pObj) ); + pObj->pCopy = (void *)Count++; + } +// printf( "\n" ); +// printf( "Nodes = %d.\n", Count-4 ); + + + + Abc_NtkForEachPo( pNtk, pObj, i ) + { + if ( i % 12 == 0 ) + printf( "\n" ); + printf( "%5d,", (int)Abc_ObjFanin0(pObj)->pCopy ); + } + printf( "\n" ); + printf( "Outputs = %d.\n", Abc_NtkPoNum(pNtk) ); + + +/* + { + unsigned char * pBuffer; + Vec_Int_t * vOuts; + int Pos, Prev, Out; + + vOuts = Vec_IntAlloc( 25000 ); + Abc_NtkForEachPo( pNtk, pObj, i ) + Vec_IntPush( vOuts, Abc_ObjFaninId0(pObj) ); + Vec_IntSort( vOuts, 0 ); + + Pos = 0; + pBuffer = ALLOC( char, 50000 ); + Prev = 0; + Vec_IntForEachEntry( vOuts, Out, i ) + { + assert( Prev < Out ); + Pos = Io_WriteAigerEncode( pBuffer, Pos, Out - Prev ); + Prev = Out; + } + Vec_IntFree( vOuts ); + + // write the buffer + for ( i = 0; i < Pos; i++ ) + { + if ( i % 32 == 0 ) + printf( "\n" ); + printf( "%d,", pBuffer[i] ); + } + printf( "\n" ); + printf( "Size = %d.\n", Pos ); + } +*/ + +} + +#endif + + + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darInt.h b/src/aig/dar/darInt.h new file mode 100644 index 00000000..4da793f5 --- /dev/null +++ b/src/aig/dar/darInt.h @@ -0,0 +1,165 @@ +/**CFile**************************************************************** + + FileName [darInt.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Internal declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darInt.h,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __DAR_INT_H__ +#define __DAR_INT_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +//#include "bar.h" +#include "vec.h" +#include "aig.h" +#include "dar.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Dar_Man_t_ Dar_Man_t; +typedef struct Dar_Cut_t_ Dar_Cut_t; + +// the AIG 4-cut +struct Dar_Cut_t_ // 6 words +{ + unsigned uSign; // cut signature + unsigned uTruth : 16; // the truth table of the cut function + unsigned Value : 11; // the value of the cut + unsigned fBest : 1; // marks the best cut + unsigned fUsed : 1; // marks the cut currently in use + unsigned nLeaves : 3; // the number of leaves + int pLeaves[4]; // the array of leaves +}; + +// the AIG manager +struct Dar_Man_t_ +{ + // input data + Dar_RwrPar_t * pPars; // rewriting parameters + Aig_Man_t * pAig; // AIG manager + // various data members + Aig_MmFixed_t * pMemCuts; // memory manager for cuts + void * pManCnf; // CNF managers + // current rewriting step + Vec_Ptr_t * vLeavesBest; // the best set of leaves + int OutBest; // the best output (in the library) + int OutNumBest; // the best number of the output + int GainBest; // the best gain + int LevelBest; // the level of node with the best gain + int ClassBest; // the equivalence class of the best replacement + // function statistics + int nTotalSubgs; // the total number of subgraphs tried + int ClassTimes[222];// the runtimes for each class + int ClassGains[222];// the gains for each class + int ClassSubgs[222];// the graphs for each class + int nCutMemUsed; // memory used for cuts + // rewriting statistics + int nNodesInit; // the original number of nodes + int nNodesTried; // the number of nodes attempted + int nCutsAll; // all cut pairs + int nCutsTried; // computed cuts + int nCutsUsed; // used cuts + int nCutsBad; // bad cuts due to absent fanin + int nCutsGood; // good cuts + int nCutsSkipped; // skipped bad cuts + // timing statistics + int timeCuts; + int timeEval; + int timeOther; + int timeTotal; + int time1; + int time2; +}; + +static inline Dar_Cut_t * Dar_ObjCuts( Aig_Obj_t * pObj ) { return pObj->pData; } +static inline void Dar_ObjSetCuts( Aig_Obj_t * pObj, Dar_Cut_t * pCuts ) { assert( !Aig_ObjIsNone(pObj) ); pObj->pData = pCuts; } + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over all cuts of the node +#define Dar_ObjForEachCutAll( pObj, pCut, i ) \ + for ( (pCut) = Dar_ObjCuts(pObj), i = 0; i < (int)(pObj)->nCuts; i++, pCut++ ) +#define Dar_ObjForEachCut( pObj, pCut, i ) \ + for ( (pCut) = Dar_ObjCuts(pObj), i = 0; i < (int)(pObj)->nCuts; i++, pCut++ ) if ( (pCut)->fUsed==0 ) {} else +// iterator over leaves of the cut +#define Dar_CutForEachLeaf( p, pCut, pLeaf, i ) \ + for ( i = 0; (i < (int)(pCut)->nLeaves) && (((pLeaf) = Aig_ManObj(p, (pCut)->pLeaves[i])), 1); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== darBalance.c ========================================================*/ +/*=== darCore.c ===========================================================*/ +/*=== darCut.c ============================================================*/ +extern void Dar_ManCutsStart( Dar_Man_t * p ); +extern void Dar_ManCutsFree( Dar_Man_t * p ); +extern Dar_Cut_t * Dar_ObjComputeCuts_rec( Dar_Man_t * p, Aig_Obj_t * pObj ); +extern Dar_Cut_t * Dar_ObjComputeCuts( Dar_Man_t * p, Aig_Obj_t * pObj ); +/*=== darData.c ===========================================================*/ +extern Vec_Int_t * Dar_LibReadNodes(); +extern Vec_Int_t * Dar_LibReadOuts(); +extern Vec_Int_t * Dar_LibReadPrios(); +/*=== darLib.c ============================================================*/ +extern void Dar_LibStart(); +extern void Dar_LibStop(); +extern void Dar_LibPrepare( int nSubgraphs ); +extern void Dar_LibReturnCanonicals( unsigned * pCanons ); +extern void Dar_LibEval( Dar_Man_t * p, Aig_Obj_t * pRoot, Dar_Cut_t * pCut, int Required ); +extern Aig_Obj_t * Dar_LibBuildBest( Dar_Man_t * p ); +/*=== darMan.c ============================================================*/ +extern Dar_Man_t * Dar_ManStart( Aig_Man_t * pAig, Dar_RwrPar_t * pPars ); +extern void Dar_ManStop( Dar_Man_t * p ); +extern void Dar_ManPrintStats( Dar_Man_t * p ); +/*=== darPrec.c ============================================================*/ +extern char ** Dar_Permutations( int n ); +extern void Dar_Truth4VarNPN( unsigned short ** puCanons, char ** puPhases, char ** puPerms, unsigned char ** puMap ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/dar/darLib.c b/src/aig/dar/darLib.c new file mode 100644 index 00000000..e0e97055 --- /dev/null +++ b/src/aig/dar/darLib.c @@ -0,0 +1,980 @@ +/**CFile**************************************************************** + + FileName [darLib.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Library of AIG subgraphs used for rewriting.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darLib.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Dar_Lib_t_ Dar_Lib_t; +typedef struct Dar_LibObj_t_ Dar_LibObj_t; +typedef struct Dar_LibDat_t_ Dar_LibDat_t; + +struct Dar_LibObj_t_ // library object (2 words) +{ + unsigned Fan0 : 16; // the first fanin + unsigned Fan1 : 16; // the second fanin + unsigned fCompl0 : 1; // the first compl attribute + unsigned fCompl1 : 1; // the second compl attribute + unsigned fPhase : 1; // the phase of the node + unsigned fTerm : 1; // indicates a PI + unsigned Num : 28; // internal use +}; + +struct Dar_LibDat_t_ // library object data +{ + Aig_Obj_t * pFunc; // the corresponding AIG node if it exists + int Level; // level of this node after it is constructured + int TravId; // traversal ID of the library object data + unsigned char fMffc; // set to one if node is part of MFFC + unsigned char nLats[3]; // the number of latches on the input/output stem +}; + +struct Dar_Lib_t_ // library +{ + // objects + Dar_LibObj_t * pObjs; // the set of library objects + int nObjs; // the number of objects used + int iObj; // the current object + // structures by class + int nSubgr[222]; // the number of subgraphs by class + int * pSubgr[222]; // the subgraphs for each class + int * pSubgrMem; // memory for subgraph pointers + int nSubgrTotal; // the total number of subgraph + // structure priorities + int * pPriosMem; // memory for priority of structures + int * pPrios[222]; // pointers to the priority numbers + // structure places in the priorities + int * pPlaceMem; // memory for places of structures in the priority lists + int * pPlace[222]; // pointers to the places numbers + // structure scores + int * pScoreMem; // memory for scores of structures + int * pScore[222]; // pointers to the scores numbers + // nodes by class + int nNodes[222]; // the number of nodes by class + int * pNodes[222]; // the nodes for each class + int * pNodesMem; // memory for nodes pointers + int nNodesTotal; // the total number of nodes + // prepared library + int nSubgraphs; + int nNodes0Max; + // nodes by class + int nNodes0[222]; // the number of nodes by class + int * pNodes0[222]; // the nodes for each class + int * pNodes0Mem; // memory for nodes pointers + int nNodes0Total; // the total number of nodes + // structures by class + int nSubgr0[222]; // the number of subgraphs by class + int * pSubgr0[222]; // the subgraphs for each class + int * pSubgr0Mem; // memory for subgraph pointers + int nSubgr0Total; // the total number of subgraph + // object data + Dar_LibDat_t * pDatas; + int nDatas; + // information about NPN classes + char ** pPerms4; + unsigned short * puCanons; + char * pPhases; + char * pPerms; + unsigned char * pMap; +}; + +static Dar_Lib_t * s_DarLib = NULL; + +static inline Dar_LibObj_t * Dar_LibObj( Dar_Lib_t * p, int Id ) { return p->pObjs + Id; } +static inline int Dar_LibObjTruth( Dar_LibObj_t * pObj ) { return pObj->Num < (0xFFFF & ~pObj->Num) ? pObj->Num : (0xFFFF & ~pObj->Num); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Lib_t * Dar_LibAlloc( int nObjs ) +{ + unsigned uTruths[4] = { 0xAAAA, 0xCCCC, 0xF0F0, 0xFF00 }; + Dar_Lib_t * p; + int i;//, clk = clock(); + p = ALLOC( Dar_Lib_t, 1 ); + memset( p, 0, sizeof(Dar_Lib_t) ); + // allocate objects + p->nObjs = nObjs; + p->pObjs = ALLOC( Dar_LibObj_t, nObjs ); + memset( p->pObjs, 0, sizeof(Dar_LibObj_t) * nObjs ); + // allocate canonical data + p->pPerms4 = Dar_Permutations( 4 ); + Dar_Truth4VarNPN( &p->puCanons, &p->pPhases, &p->pPerms, &p->pMap ); + // start the elementary objects + p->iObj = 4; + for ( i = 0; i < 4; i++ ) + { + p->pObjs[i].fTerm = 1; + p->pObjs[i].Num = uTruths[i]; + } +// PRT( "Library start", clock() - clk ); + return p; +} + +/**Function************************************************************* + + Synopsis [Frees the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibFree( Dar_Lib_t * p ) +{ + free( p->pObjs ); + free( p->pDatas ); + free( p->pNodesMem ); + free( p->pNodes0Mem ); + free( p->pSubgrMem ); + free( p->pSubgr0Mem ); + free( p->pPriosMem ); + FREE( p->pPlaceMem ); + FREE( p->pScoreMem ); + free( p->pPerms4 ); + free( p->puCanons ); + free( p->pPhases ); + free( p->pPerms ); + free( p->pMap ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Returns canonical truth tables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibReturnCanonicals( unsigned * pCanons ) +{ + int Visits[222] = {0}; + int i, k; + // find canonical truth tables + for ( i = k = 0; i < (1<<16); i++ ) + if ( !Visits[s_DarLib->pMap[i]] ) + { + Visits[s_DarLib->pMap[i]] = 1; + pCanons[k++] = ((i<<16) | i); + } + assert( k == 222 ); +} + +/**Function************************************************************* + + Synopsis [Adds one AND to the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibAddNode( Dar_Lib_t * p, int Id0, int Id1, int fCompl0, int fCompl1 ) +{ + Dar_LibObj_t * pFan0 = Dar_LibObj( p, Id0 ); + Dar_LibObj_t * pFan1 = Dar_LibObj( p, Id1 ); + Dar_LibObj_t * pObj = p->pObjs + p->iObj++; + pObj->Fan0 = Id0; + pObj->Fan1 = Id1; + pObj->fCompl0 = fCompl0; + pObj->fCompl1 = fCompl1; + pObj->fPhase = (fCompl0 ^ pFan0->fPhase) & (fCompl1 ^ pFan1->fPhase); + pObj->Num = 0xFFFF & (fCompl0? ~pFan0->Num : pFan0->Num) & (fCompl1? ~pFan1->Num : pFan1->Num); +} + +/**Function************************************************************* + + Synopsis [Adds one AND to the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibSetup_rec( Dar_Lib_t * p, Dar_LibObj_t * pObj, int Class, int fCollect ) +{ + if ( pObj->fTerm || (int)pObj->Num == Class ) + return; + pObj->Num = Class; + Dar_LibSetup_rec( p, Dar_LibObj(p, pObj->Fan0), Class, fCollect ); + Dar_LibSetup_rec( p, Dar_LibObj(p, pObj->Fan1), Class, fCollect ); + if ( fCollect ) + p->pNodes[Class][ p->nNodes[Class]++ ] = pObj-p->pObjs; + else + p->nNodes[Class]++; +} + +/**Function************************************************************* + + Synopsis [Adds one AND to the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibSetup( Dar_Lib_t * p, Vec_Int_t * vOuts, Vec_Int_t * vPrios ) +{ + int fTraining = 0; + Dar_LibObj_t * pObj; + int nNodesTotal, uTruth, Class, Out, i, k; + assert( p->iObj == p->nObjs ); + + // count the number of representatives of each class + for ( i = 0; i < 222; i++ ) + p->nSubgr[i] = p->nNodes[i] = 0; + Vec_IntForEachEntry( vOuts, Out, i ) + { + pObj = Dar_LibObj( p, Out ); + uTruth = Dar_LibObjTruth( pObj ); + Class = p->pMap[uTruth]; + p->nSubgr[Class]++; + } + // allocate memory for the roots of each class + p->pSubgrMem = ALLOC( int, Vec_IntSize(vOuts) ); + p->pSubgr0Mem = ALLOC( int, Vec_IntSize(vOuts) ); + p->nSubgrTotal = 0; + for ( i = 0; i < 222; i++ ) + { + p->pSubgr[i] = p->pSubgrMem + p->nSubgrTotal; + p->pSubgr0[i] = p->pSubgr0Mem + p->nSubgrTotal; + p->nSubgrTotal += p->nSubgr[i]; + p->nSubgr[i] = 0; + } + assert( p->nSubgrTotal == Vec_IntSize(vOuts) ); + // add the outputs to storage + Vec_IntForEachEntry( vOuts, Out, i ) + { + pObj = Dar_LibObj( p, Out ); + uTruth = Dar_LibObjTruth( pObj ); + Class = p->pMap[uTruth]; + p->pSubgr[Class][ p->nSubgr[Class]++ ] = Out; + } + + if ( fTraining ) + { + // allocate memory for the priority of roots of each class + p->pPriosMem = ALLOC( int, Vec_IntSize(vOuts) ); + p->nSubgrTotal = 0; + for ( i = 0; i < 222; i++ ) + { + p->pPrios[i] = p->pPriosMem + p->nSubgrTotal; + p->nSubgrTotal += p->nSubgr[i]; + for ( k = 0; k < p->nSubgr[i]; k++ ) + p->pPrios[i][k] = k; + + } + assert( p->nSubgrTotal == Vec_IntSize(vOuts) ); + + // allocate memory for the priority of roots of each class + p->pPlaceMem = ALLOC( int, Vec_IntSize(vOuts) ); + p->nSubgrTotal = 0; + for ( i = 0; i < 222; i++ ) + { + p->pPlace[i] = p->pPlaceMem + p->nSubgrTotal; + p->nSubgrTotal += p->nSubgr[i]; + for ( k = 0; k < p->nSubgr[i]; k++ ) + p->pPlace[i][k] = k; + + } + assert( p->nSubgrTotal == Vec_IntSize(vOuts) ); + + // allocate memory for the priority of roots of each class + p->pScoreMem = ALLOC( int, Vec_IntSize(vOuts) ); + p->nSubgrTotal = 0; + for ( i = 0; i < 222; i++ ) + { + p->pScore[i] = p->pScoreMem + p->nSubgrTotal; + p->nSubgrTotal += p->nSubgr[i]; + for ( k = 0; k < p->nSubgr[i]; k++ ) + p->pScore[i][k] = 0; + + } + assert( p->nSubgrTotal == Vec_IntSize(vOuts) ); + } + else + { + int Counter = 0; + // allocate memory for the priority of roots of each class + p->pPriosMem = ALLOC( int, Vec_IntSize(vOuts) ); + p->nSubgrTotal = 0; + for ( i = 0; i < 222; i++ ) + { + p->pPrios[i] = p->pPriosMem + p->nSubgrTotal; + p->nSubgrTotal += p->nSubgr[i]; + for ( k = 0; k < p->nSubgr[i]; k++ ) + p->pPrios[i][k] = Vec_IntEntry(vPrios, Counter++); + + } + assert( p->nSubgrTotal == Vec_IntSize(vOuts) ); + assert( Counter == Vec_IntSize(vPrios) ); + } + + // create traversal IDs + for ( i = 0; i < p->iObj; i++ ) + Dar_LibObj(p, i)->Num = 0xff; + // count nodes in each class + for ( i = 0; i < 222; i++ ) + for ( k = 0; k < p->nSubgr[i]; k++ ) + Dar_LibSetup_rec( p, Dar_LibObj(p, p->pSubgr[i][k]), i, 0 ); + // count the total number of nodes + p->nNodesTotal = 0; + for ( i = 0; i < 222; i++ ) + p->nNodesTotal += p->nNodes[i]; + // allocate memory for the nodes of each class + p->pNodesMem = ALLOC( int, p->nNodesTotal ); + p->pNodes0Mem = ALLOC( int, p->nNodesTotal ); + p->nNodesTotal = 0; + for ( i = 0; i < 222; i++ ) + { + p->pNodes[i] = p->pNodesMem + p->nNodesTotal; + p->pNodes0[i] = p->pNodes0Mem + p->nNodesTotal; + p->nNodesTotal += p->nNodes[i]; + p->nNodes[i] = 0; + } + // create traversal IDs + for ( i = 0; i < p->iObj; i++ ) + Dar_LibObj(p, i)->Num = 0xff; + // add the nodes to storage + nNodesTotal = 0; + for ( i = 0; i < 222; i++ ) + { + for ( k = 0; k < p->nSubgr[i]; k++ ) + Dar_LibSetup_rec( p, Dar_LibObj(p, p->pSubgr[i][k]), i, 1 ); + nNodesTotal += p->nNodes[i]; +//printf( "Class %3d : Subgraphs = %4d. Nodes = %5d.\n", i, p->nSubgr[i], p->nNodes[i] ); + } + assert( nNodesTotal == p->nNodesTotal ); + // prepare the number of the PI nodes + for ( i = 0; i < 4; i++ ) + Dar_LibObj(p, i)->Num = i; +} + +/**Function************************************************************* + + Synopsis [Starts the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibCreateData( Dar_Lib_t * p, int nDatas ) +{ + if ( p->nDatas == nDatas ) + return; + FREE( p->pDatas ); + // allocate datas + p->nDatas = nDatas; + p->pDatas = ALLOC( Dar_LibDat_t, nDatas ); + memset( p->pDatas, 0, sizeof(Dar_LibDat_t) * nDatas ); +} + +/**Function************************************************************* + + Synopsis [Adds one AND to the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibSetup0_rec( Dar_Lib_t * p, Dar_LibObj_t * pObj, int Class, int fCollect ) +{ + if ( pObj->fTerm || (int)pObj->Num == Class ) + return; + pObj->Num = Class; + Dar_LibSetup0_rec( p, Dar_LibObj(p, pObj->Fan0), Class, fCollect ); + Dar_LibSetup0_rec( p, Dar_LibObj(p, pObj->Fan1), Class, fCollect ); + if ( fCollect ) + p->pNodes0[Class][ p->nNodes0[Class]++ ] = pObj-p->pObjs; + else + p->nNodes0[Class]++; +} + +/**Function************************************************************* + + Synopsis [Starts the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibPrepare( int nSubgraphs ) +{ + Dar_Lib_t * p = s_DarLib; + int i, k, nNodes0Total; + if ( p->nSubgraphs == nSubgraphs ) + return; + + // favor special classes: + // 1 : F = (!d*!c*!b*!a) + // 4 : F = (!d*!c*!(b*a)) + // 12 : F = (!d*!(c*!(!b*!a))) + // 20 : F = (!d*!(c*b*a)) + + // set the subgraph counters + p->nSubgr0Total = 0; + for ( i = 0; i < 222; i++ ) + { +// if ( i == 1 || i == 4 || i == 12 || i == 20 ) // special classes + if ( i == 1 ) // special classes + p->nSubgr0[i] = p->nSubgr[i]; + else + p->nSubgr0[i] = AIG_MIN( p->nSubgr[i], nSubgraphs ); + p->nSubgr0Total += p->nSubgr0[i]; + for ( k = 0; k < p->nSubgr0[i]; k++ ) + p->pSubgr0[i][k] = p->pSubgr[i][ p->pPrios[i][k] ]; + } + + // count the number of nodes + // clean node counters + for ( i = 0; i < 222; i++ ) + p->nNodes0[i] = 0; + // create traversal IDs + for ( i = 0; i < p->iObj; i++ ) + Dar_LibObj(p, i)->Num = 0xff; + // count nodes in each class + // count the total number of nodes and the largest class + p->nNodes0Total = 0; + p->nNodes0Max = 0; + for ( i = 0; i < 222; i++ ) + { + for ( k = 0; k < p->nSubgr0[i]; k++ ) + Dar_LibSetup0_rec( p, Dar_LibObj(p, p->pSubgr0[i][k]), i, 0 ); + p->nNodes0Total += p->nNodes0[i]; + p->nNodes0Max = AIG_MAX( p->nNodes0Max, p->nNodes0[i] ); + } + + // clean node counters + for ( i = 0; i < 222; i++ ) + p->nNodes0[i] = 0; + // create traversal IDs + for ( i = 0; i < p->iObj; i++ ) + Dar_LibObj(p, i)->Num = 0xff; + // add the nodes to storage + nNodes0Total = 0; + for ( i = 0; i < 222; i++ ) + { + for ( k = 0; k < p->nSubgr0[i]; k++ ) + Dar_LibSetup0_rec( p, Dar_LibObj(p, p->pSubgr0[i][k]), i, 1 ); + nNodes0Total += p->nNodes0[i]; + } + assert( nNodes0Total == p->nNodes0Total ); + // prepare the number of the PI nodes + for ( i = 0; i < 4; i++ ) + Dar_LibObj(p, i)->Num = i; + + // realloc the datas + Dar_LibCreateData( p, p->nNodes0Max + 32 ); + // allocated more because Dar_LibBuildBest() sometimes requires more entries +} + +/**Function************************************************************* + + Synopsis [Reads library from array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Lib_t * Dar_LibRead() +{ + Vec_Int_t * vObjs, * vOuts, * vPrios; + Dar_Lib_t * p; + int i; + // read nodes and outputs + vObjs = Dar_LibReadNodes(); + vOuts = Dar_LibReadOuts(); + vPrios = Dar_LibReadPrios(); + // create library + p = Dar_LibAlloc( Vec_IntSize(vObjs)/2 + 4 ); + // create nodes + for ( i = 0; i < vObjs->nSize; i += 2 ) + Dar_LibAddNode( p, vObjs->pArray[i] >> 1, vObjs->pArray[i+1] >> 1, + vObjs->pArray[i] & 1, vObjs->pArray[i+1] & 1 ); + // create outputs + Dar_LibSetup( p, vOuts, vPrios ); + Vec_IntFree( vObjs ); + Vec_IntFree( vOuts ); + Vec_IntFree( vPrios ); + return p; +} + +/**Function************************************************************* + + Synopsis [Starts the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibStart() +{ +// int clk = clock(); + assert( s_DarLib == NULL ); + s_DarLib = Dar_LibRead(); +// printf( "The 4-input library started with %d nodes and %d subgraphs. ", s_DarLib->nObjs - 4, s_DarLib->nSubgrTotal ); +// PRT( "Time", clock() - clk ); +} + +/**Function************************************************************* + + Synopsis [Stops the library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibStop() +{ + assert( s_DarLib != NULL ); + Dar_LibFree( s_DarLib ); + s_DarLib = NULL; +} + +/**Function************************************************************* + + Synopsis [Updates the score of the class and adjusts the priority of this class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibIncrementScore( int Class, int Out, int Gain ) +{ + int * pPrios = s_DarLib->pPrios[Class]; // pPrios[i] = Out + int * pPlace = s_DarLib->pPlace[Class]; // pPlace[Out] = i + int * pScore = s_DarLib->pScore[Class]; // score of Out + int Out2; + assert( Class >= 0 && Class < 222 ); + assert( Out >= 0 && Out < s_DarLib->nSubgr[Class] ); + assert( pPlace[pPrios[Out]] == Out ); + // increment the score + pScore[Out] += Gain; + // move the out in the order + while ( pPlace[Out] > 0 && pScore[Out] > pScore[ pPrios[pPlace[Out]-1] ] ) + { + // get the previous output in the priority list + Out2 = pPrios[pPlace[Out]-1]; + // swap Out and Out2 + pPlace[Out]--; + pPlace[Out2]++; + pPrios[pPlace[Out]] = Out; + pPrios[pPlace[Out2]] = Out2; + } +} + +/**Function************************************************************* + + Synopsis [Prints out the priorities into the file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibDumpPriorities() +{ + int i, k, Out, Out2, Counter = 0, Printed = 0; + printf( "\nOutput priorities (total = %d):\n", s_DarLib->nSubgrTotal ); + for ( i = 0; i < 222; i++ ) + { +// printf( "Class%d: ", i ); + for ( k = 0; k < s_DarLib->nSubgr[i]; k++ ) + { + Out = s_DarLib->pPrios[i][k]; + Out2 = k == 0 ? Out : s_DarLib->pPrios[i][k-1]; + assert( s_DarLib->pScore[i][Out2] >= s_DarLib->pScore[i][Out] ); +// printf( "%d(%d), ", Out, s_DarLib->pScore[i][Out] ); + printf( "%d, ", Out ); + Printed++; + if ( ++Counter == 15 ) + { + printf( "\n" ); + Counter = 0; + } + } + } + printf( "\n" ); + assert( Printed == s_DarLib->nSubgrTotal ); +} + + +/**Function************************************************************* + + Synopsis [Matches the cut with its canonical form.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_LibCutMatch( Dar_Man_t * p, Dar_Cut_t * pCut ) +{ + Aig_Obj_t * pFanin; + unsigned uPhase; + char * pPerm; + int i; + assert( pCut->nLeaves == 4 ); + // get the fanin permutation + uPhase = s_DarLib->pPhases[pCut->uTruth]; + pPerm = s_DarLib->pPerms4[ (int)s_DarLib->pPerms[pCut->uTruth] ]; + // collect fanins with the corresponding permutation/phase + for ( i = 0; i < (int)pCut->nLeaves; i++ ) + { + pFanin = Aig_ManObj( p->pAig, pCut->pLeaves[ (int)pPerm[i] ] ); + if ( pFanin == NULL ) + { + p->nCutsBad++; + return 0; + } + pFanin = Aig_NotCond(pFanin, ((uPhase >> i) & 1) ); + s_DarLib->pDatas[i].pFunc = pFanin; + s_DarLib->pDatas[i].Level = Aig_Regular(pFanin)->Level; + } + p->nCutsGood++; + return 1; +} + + + +/**Function************************************************************* + + Synopsis [Marks the MFFC of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_LibCutMarkMffc( Aig_Man_t * p, Aig_Obj_t * pRoot, int nLeaves ) +{ + int i, nNodes; + // mark the cut leaves + for ( i = 0; i < nLeaves; i++ ) + Aig_Regular(s_DarLib->pDatas[i].pFunc)->nRefs++; + // label MFFC with current ID + nNodes = Aig_NodeMffsLabel( p, pRoot ); + // unmark the cut leaves + for ( i = 0; i < nLeaves; i++ ) + Aig_Regular(s_DarLib->pDatas[i].pFunc)->nRefs--; + return nNodes; +} + +/**Function************************************************************* + + Synopsis [Evaluates one cut.] + + Description [Returns the best gain.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibObjPrint_rec( Dar_LibObj_t * pObj ) +{ + if ( pObj->fTerm ) + { + printf( "%c", 'a' + (int)(pObj - s_DarLib->pObjs) ); + return; + } + printf( "(" ); + Dar_LibObjPrint_rec( Dar_LibObj(s_DarLib, pObj->Fan0) ); + if ( pObj->fCompl0 ) + printf( "\'" ); + Dar_LibObjPrint_rec( Dar_LibObj(s_DarLib, pObj->Fan1) ); + if ( pObj->fCompl0 ) + printf( "\'" ); + printf( ")" ); +} + + +/**Function************************************************************* + + Synopsis [Assigns numbers to the nodes of one class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibEvalAssignNums( Dar_Man_t * p, int Class ) +{ + Dar_LibObj_t * pObj; + Dar_LibDat_t * pData, * pData0, * pData1; + Aig_Obj_t * pFanin0, * pFanin1; + int i; + for ( i = 0; i < s_DarLib->nNodes0[Class]; i++ ) + { + // get one class node, assign its temporary number and set its data + pObj = Dar_LibObj(s_DarLib, s_DarLib->pNodes0[Class][i]); + pObj->Num = 4 + i; + assert( (int)pObj->Num < s_DarLib->nNodes0Max + 4 ); + pData = s_DarLib->pDatas + pObj->Num; + pData->fMffc = 0; + pData->pFunc = NULL; + pData->TravId = 0xFFFF; + + // explore the fanins + assert( (int)Dar_LibObj(s_DarLib, pObj->Fan0)->Num < s_DarLib->nNodes0Max + 4 ); + assert( (int)Dar_LibObj(s_DarLib, pObj->Fan1)->Num < s_DarLib->nNodes0Max + 4 ); + pData0 = s_DarLib->pDatas + Dar_LibObj(s_DarLib, pObj->Fan0)->Num; + pData1 = s_DarLib->pDatas + Dar_LibObj(s_DarLib, pObj->Fan1)->Num; + pData->Level = 1 + AIG_MAX(pData0->Level, pData1->Level); + if ( pData0->pFunc == NULL || pData1->pFunc == NULL ) + continue; + pFanin0 = Aig_NotCond( pData0->pFunc, pObj->fCompl0 ); + pFanin1 = Aig_NotCond( pData1->pFunc, pObj->fCompl1 ); + pData->pFunc = Aig_TableLookupTwo( p->pAig, pFanin0, pFanin1 ); + if ( pData->pFunc ) + { + // update the level to be more accurate + pData->Level = Aig_Regular(pData->pFunc)->Level; + // mark the node if it is part of MFFC + pData->fMffc = Aig_ObjIsTravIdCurrent(p->pAig, pData->pFunc); + } + } +} + +/**Function************************************************************* + + Synopsis [Evaluates one cut.] + + Description [Returns the best gain.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_LibEval_rec( Dar_LibObj_t * pObj, int Out, int nNodesSaved, int Required ) +{ + Dar_LibDat_t * pData; + int Area; + if ( pObj->fTerm ) + return 0; + assert( pObj->Num > 3 ); + pData = s_DarLib->pDatas + pObj->Num; + if ( pData->Level > Required ) + return 0xff; + if ( pData->pFunc && !pData->fMffc ) + return 0; + if ( pData->TravId == Out ) + return 0; + pData->TravId = Out; + // this is a new node - get a bound on the area of its branches + nNodesSaved--; + Area = Dar_LibEval_rec( Dar_LibObj(s_DarLib, pObj->Fan0), Out, nNodesSaved, Required+1 ); + if ( Area > nNodesSaved ) + return 0xff; + Area += Dar_LibEval_rec( Dar_LibObj(s_DarLib, pObj->Fan1), Out, nNodesSaved, Required+1 ); + if ( Area > nNodesSaved ) + return 0xff; + return Area + 1; +} + +/**Function************************************************************* + + Synopsis [Evaluates one cut.] + + Description [Returns the best gain.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibEval( Dar_Man_t * p, Aig_Obj_t * pRoot, Dar_Cut_t * pCut, int Required ) +{ + int fTraining = 0; + Dar_LibObj_t * pObj; + int Out, k, Class, nNodesSaved, nNodesAdded, nNodesGained, clk; + clk = clock(); + if ( pCut->nLeaves != 4 ) + return; + // check if the cut exits and assigns leaves and their levels + if ( !Dar_LibCutMatch(p, pCut) ) + return; + // mark MFFC of the node + nNodesSaved = Dar_LibCutMarkMffc( p->pAig, pRoot, pCut->nLeaves ); + // evaluate the cut + Class = s_DarLib->pMap[pCut->uTruth]; + Dar_LibEvalAssignNums( p, Class ); + // profile outputs by their savings + p->nTotalSubgs += s_DarLib->nSubgr0[Class]; + p->ClassSubgs[Class] += s_DarLib->nSubgr0[Class]; + for ( Out = 0; Out < s_DarLib->nSubgr0[Class]; Out++ ) + { + pObj = Dar_LibObj(s_DarLib, s_DarLib->pSubgr0[Class][Out]); + if ( Aig_Regular(s_DarLib->pDatas[pObj->Num].pFunc) == pRoot ) + continue; + nNodesAdded = Dar_LibEval_rec( pObj, Out, nNodesSaved - !p->pPars->fUseZeros, Required ); + nNodesGained = nNodesSaved - nNodesAdded; + if ( fTraining && nNodesGained >= 0 ) + Dar_LibIncrementScore( Class, Out, nNodesGained + 1 ); + if ( nNodesGained < 0 || (nNodesGained == 0 && !p->pPars->fUseZeros) ) + continue; + if ( nNodesGained < p->GainBest || + (nNodesGained == p->GainBest && s_DarLib->pDatas[pObj->Num].Level >= p->LevelBest) ) + continue; + // remember this possibility + Vec_PtrClear( p->vLeavesBest ); + for ( k = 0; k < (int)pCut->nLeaves; k++ ) + Vec_PtrPush( p->vLeavesBest, s_DarLib->pDatas[k].pFunc ); + p->OutBest = s_DarLib->pSubgr0[Class][Out]; + p->OutNumBest = Out; + p->LevelBest = s_DarLib->pDatas[pObj->Num].Level; + p->GainBest = nNodesGained; + p->ClassBest = Class; + assert( p->LevelBest <= Required ); + } +clk = clock() - clk; +p->ClassTimes[Class] += clk; +p->timeEval += clk; +} + +/**Function************************************************************* + + Synopsis [Clears the fields of the nodes used in this cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_LibBuildClear_rec( Dar_LibObj_t * pObj, int * pCounter ) +{ + if ( pObj->fTerm ) + return; + pObj->Num = (*pCounter)++; + s_DarLib->pDatas[ pObj->Num ].pFunc = NULL; + Dar_LibBuildClear_rec( Dar_LibObj(s_DarLib, pObj->Fan0), pCounter ); + Dar_LibBuildClear_rec( Dar_LibObj(s_DarLib, pObj->Fan1), pCounter ); +} + +/**Function************************************************************* + + Synopsis [Reconstructs the best cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Dar_LibBuildBest_rec( Dar_Man_t * p, Dar_LibObj_t * pObj ) +{ + Aig_Obj_t * pFanin0, * pFanin1; + Dar_LibDat_t * pData = s_DarLib->pDatas + pObj->Num; + if ( pData->pFunc ) + return pData->pFunc; + pFanin0 = Dar_LibBuildBest_rec( p, Dar_LibObj(s_DarLib, pObj->Fan0) ); + pFanin1 = Dar_LibBuildBest_rec( p, Dar_LibObj(s_DarLib, pObj->Fan1) ); + pFanin0 = Aig_NotCond( pFanin0, pObj->fCompl0 ); + pFanin1 = Aig_NotCond( pFanin1, pObj->fCompl1 ); + pData->pFunc = Aig_And( p->pAig, pFanin0, pFanin1 ); +// assert( pData->Level == (int)Aig_Regular(pData->pFunc)->Level ); + return pData->pFunc; +} + +/**Function************************************************************* + + Synopsis [Reconstructs the best cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Dar_LibBuildBest( Dar_Man_t * p ) +{ + int i, Counter = 4; + for ( i = 0; i < Vec_PtrSize(p->vLeavesBest); i++ ) + s_DarLib->pDatas[i].pFunc = Vec_PtrEntry( p->vLeavesBest, i ); + Dar_LibBuildClear_rec( Dar_LibObj(s_DarLib, p->OutBest), &Counter ); + return Dar_LibBuildBest_rec( p, Dar_LibObj(s_DarLib, p->OutBest) ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darMan.c b/src/aig/dar/darMan.c new file mode 100644 index 00000000..0a5a36b1 --- /dev/null +++ b/src/aig/dar/darMan.c @@ -0,0 +1,133 @@ +/**CFile**************************************************************** + + FileName [darMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [AIG manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darMan.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Man_t * Dar_ManStart( Aig_Man_t * pAig, Dar_RwrPar_t * pPars ) +{ + Dar_Man_t * p; + // start the manager + p = ALLOC( Dar_Man_t, 1 ); + memset( p, 0, sizeof(Dar_Man_t) ); + p->pPars = pPars; + p->pAig = pAig; + // prepare the internal memory manager + p->pMemCuts = Aig_MmFixedStart( p->pPars->nCutsMax * sizeof(Dar_Cut_t), 1024 ); + // other data + p->vLeavesBest = Vec_PtrAlloc( 4 ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManStop( Dar_Man_t * p ) +{ + if ( p->pPars->fVerbose ) + Dar_ManPrintStats( p ); + if ( p->pMemCuts ) + Aig_MmFixedStop( p->pMemCuts, 0 ); + if ( p->vLeavesBest ) + Vec_PtrFree( p->vLeavesBest ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManPrintStats( Dar_Man_t * p ) +{ + unsigned pCanons[222]; + int Gain, i; + extern void Kit_DsdPrintFromTruth( unsigned * pTruth, int nVars ); + + Gain = p->nNodesInit - Aig_ManNodeNum(p->pAig); + printf( "Tried = %8d. Beg = %8d. End = %8d. Gain = %6d. (%6.2f %%). Cut mem = %d Mb\n", + p->nNodesTried, p->nNodesInit, Aig_ManNodeNum(p->pAig), Gain, 100.0*Gain/p->nNodesInit, p->nCutMemUsed ); + printf( "Cuts = %8d. Tried = %8d. Used = %8d. Bad = %5d. Skipped = %5d. Ave = %.2f.\n", + p->nCutsAll, p->nCutsTried, p->nCutsUsed, p->nCutsBad, p->nCutsSkipped, + (float)p->nCutsUsed/Aig_ManNodeNum(p->pAig) ); + + printf( "Bufs = %5d. BufMax = %5d. BufReplace = %6d. BufFix = %6d. Levels = %4d.\n", + Aig_ManBufNum(p->pAig), p->pAig->nBufMax, p->pAig->nBufReplaces, p->pAig->nBufFixes, Aig_ManLevels(p->pAig) ); + PRT( "Cuts ", p->timeCuts ); + PRT( "Eval ", p->timeEval ); + PRT( "Other ", p->timeOther ); + PRT( "TOTAL ", p->timeTotal ); + + if ( !p->pPars->fVeryVerbose ) + return; + Dar_LibReturnCanonicals( pCanons ); + for ( i = 0; i < 222; i++ ) + { + if ( p->ClassGains[i] == 0 && p->ClassTimes[i] == 0 ) + continue; + printf( "%3d : ", i ); + printf( "G = %6d (%5.2f %%) ", p->ClassGains[i], Gain? 100.0*p->ClassGains[i]/Gain : 0.0 ); + printf( "S = %8d (%5.2f %%) ", p->ClassSubgs[i], p->nTotalSubgs? 100.0*p->ClassSubgs[i]/p->nTotalSubgs : 0.0 ); + printf( "R = %7d ", p->ClassGains[i]? p->ClassSubgs[i]/p->ClassGains[i] : 9999999 ); +// Kit_DsdPrintFromTruth( pCanons + i, 4 ); +// PRTP( "T", p->ClassTimes[i], p->timeEval ); + printf( "\n" ); + } +} + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darPrec.c b/src/aig/dar/darPrec.c new file mode 100644 index 00000000..8c3a4ce3 --- /dev/null +++ b/src/aig/dar/darPrec.c @@ -0,0 +1,387 @@ +/**CFile**************************************************************** + + FileName [darPrec.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Truth table precomputation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darPrec.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocated one-memory-chunk array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char ** Dar_ArrayAlloc( int nCols, int nRows, int Size ) +{ + char ** pRes; + char * pBuffer; + int i; + assert( nCols > 0 && nRows > 0 && Size > 0 ); + pBuffer = ALLOC( char, nCols * (sizeof(void *) + nRows * Size) ); + pRes = (char **)pBuffer; + pRes[0] = pBuffer + nCols * sizeof(void *); + for ( i = 1; i < nCols; i++ ) + pRes[i] = pRes[0] + i * nRows * Size; + return pRes; +} + +/**Function******************************************************************** + + Synopsis [Computes the factorial.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +int Dar_Factorial( int n ) +{ + int i, Res = 1; + for ( i = 1; i <= n; i++ ) + Res *= i; + return Res; +} + +/**Function******************************************************************** + + Synopsis [Fills in the array of permutations.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Dar_Permutations_rec( char ** pRes, int nFact, int n, char Array[] ) +{ + char ** pNext; + int nFactNext; + int iTemp, iCur, iLast, k; + + if ( n == 1 ) + { + pRes[0][0] = Array[0]; + return; + } + + // get the next factorial + nFactNext = nFact / n; + // get the last entry + iLast = n - 1; + + for ( iCur = 0; iCur < n; iCur++ ) + { + // swap Cur and Last + iTemp = Array[iCur]; + Array[iCur] = Array[iLast]; + Array[iLast] = iTemp; + + // get the pointer to the current section + pNext = pRes + (n - 1 - iCur) * nFactNext; + + // set the last entry + for ( k = 0; k < nFactNext; k++ ) + pNext[k][iLast] = Array[iLast]; + + // call recursively for this part + Dar_Permutations_rec( pNext, nFactNext, n - 1, Array ); + + // swap them back + iTemp = Array[iCur]; + Array[iCur] = Array[iLast]; + Array[iLast] = iTemp; + } +} + +/**Function******************************************************************** + + Synopsis [Computes the set of all permutations.] + + Description [The number of permutations in the array is n!. The number of + entries in each permutation is n. Therefore, the resulting array is a + two-dimentional array of the size: n! x n. To free the resulting array, + call free() on the pointer returned by this procedure.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +char ** Dar_Permutations( int n ) +{ + char Array[50]; + char ** pRes; + int nFact, i; + // allocate memory + nFact = Dar_Factorial( n ); + pRes = Dar_ArrayAlloc( nFact, n, sizeof(char) ); + // fill in the permutations + for ( i = 0; i < n; i++ ) + Array[i] = i; + Dar_Permutations_rec( pRes, nFact, n, Array ); + // print the permutations +/* + { + int i, k; + for ( i = 0; i < nFact; i++ ) + { + printf( "{" ); + for ( k = 0; k < n; k++ ) + printf( " %d", pRes[i][k] ); + printf( " }\n" ); + } + } +*/ + return pRes; +} + +/**Function************************************************************* + + Synopsis [Permutes the given vector of minterms.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_TruthPermute_int( int * pMints, int nMints, char * pPerm, int nVars, int * pMintsP ) +{ + int m, v; + // clean the storage for minterms + memset( pMintsP, 0, sizeof(int) * nMints ); + // go through minterms and add the variables + for ( m = 0; m < nMints; m++ ) + for ( v = 0; v < nVars; v++ ) + if ( pMints[m] & (1 << v) ) + pMintsP[m] |= (1 << pPerm[v]); +} + +/**Function************************************************************* + + Synopsis [Permutes the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Dar_TruthPermute( unsigned Truth, char * pPerms, int nVars, int fReverse ) +{ + unsigned Result; + int * pMints; + int * pMintsP; + int nMints; + int i, m; + + assert( nVars < 6 ); + nMints = (1 << nVars); + pMints = ALLOC( int, nMints ); + pMintsP = ALLOC( int, nMints ); + for ( i = 0; i < nMints; i++ ) + pMints[i] = i; + + Dar_TruthPermute_int( pMints, nMints, pPerms, nVars, pMintsP ); + + Result = 0; + if ( fReverse ) + { + for ( m = 0; m < nMints; m++ ) + if ( Truth & (1 << pMintsP[m]) ) + Result |= (1 << m); + } + else + { + for ( m = 0; m < nMints; m++ ) + if ( Truth & (1 << m) ) + Result |= (1 << pMintsP[m]); + } + + free( pMints ); + free( pMintsP ); + + return Result; +} + +/**Function************************************************************* + + Synopsis [Changes the phase of the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Dar_TruthPolarize( unsigned uTruth, int Polarity, int nVars ) +{ + // elementary truth tables + static unsigned Signs[5] = { + 0xAAAAAAAA, // 1010 1010 1010 1010 1010 1010 1010 1010 + 0xCCCCCCCC, // 1010 1010 1010 1010 1010 1010 1010 1010 + 0xF0F0F0F0, // 1111 0000 1111 0000 1111 0000 1111 0000 + 0xFF00FF00, // 1111 1111 0000 0000 1111 1111 0000 0000 + 0xFFFF0000 // 1111 1111 1111 1111 0000 0000 0000 0000 + }; + unsigned uTruthRes, uCof0, uCof1; + int nMints, Shift, v; + assert( nVars < 6 ); + nMints = (1 << nVars); + uTruthRes = uTruth; + for ( v = 0; v < nVars; v++ ) + if ( Polarity & (1 << v) ) + { + uCof0 = uTruth & ~Signs[v]; + uCof1 = uTruth & Signs[v]; + Shift = (1 << v); + uCof0 <<= Shift; + uCof1 >>= Shift; + uTruth = uCof0 | uCof1; + } + return uTruth; +} + +/**Function************************************************************* + + Synopsis [Computes NPN canonical forms for 4-variable functions.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_Truth4VarNPN( unsigned short ** puCanons, char ** puPhases, char ** puPerms, unsigned char ** puMap ) +{ + unsigned short * uCanons; + unsigned char * uMap; + unsigned uTruth, uPhase, uPerm; + char ** pPerms4, * uPhases, * uPerms; + int nFuncs, nClasses; + int i, k; + + nFuncs = (1 << 16); + uCanons = ALLOC( unsigned short, nFuncs ); + uPhases = ALLOC( char, nFuncs ); + uPerms = ALLOC( char, nFuncs ); + uMap = ALLOC( unsigned char, nFuncs ); + memset( uCanons, 0, sizeof(unsigned short) * nFuncs ); + memset( uPhases, 0, sizeof(char) * nFuncs ); + memset( uPerms, 0, sizeof(char) * nFuncs ); + memset( uMap, 0, sizeof(unsigned char) * nFuncs ); + pPerms4 = Dar_Permutations( 4 ); + + nClasses = 1; + nFuncs = (1 << 15); + for ( uTruth = 1; uTruth < (unsigned)nFuncs; uTruth++ ) + { + // skip already assigned + if ( uCanons[uTruth] ) + { + assert( uTruth > uCanons[uTruth] ); + uMap[~uTruth & 0xFFFF] = uMap[uTruth] = uMap[uCanons[uTruth]]; + continue; + } + uMap[uTruth] = nClasses++; + for ( i = 0; i < 16; i++ ) + { + uPhase = Dar_TruthPolarize( uTruth, i, 4 ); + for ( k = 0; k < 24; k++ ) + { + uPerm = Dar_TruthPermute( uPhase, pPerms4[k], 4, 0 ); + if ( uCanons[uPerm] == 0 ) + { + uCanons[uPerm] = uTruth; + uPhases[uPerm] = i; + uPerms[uPerm] = k; + + uPerm = ~uPerm & 0xFFFF; + uCanons[uPerm] = uTruth; + uPhases[uPerm] = i | 16; + uPerms[uPerm] = k; + } + else + assert( uCanons[uPerm] == uTruth ); + } + uPhase = Dar_TruthPolarize( ~uTruth & 0xFFFF, i, 4 ); + for ( k = 0; k < 24; k++ ) + { + uPerm = Dar_TruthPermute( uPhase, pPerms4[k], 4, 0 ); + if ( uCanons[uPerm] == 0 ) + { + uCanons[uPerm] = uTruth; + uPhases[uPerm] = i; + uPerms[uPerm] = k; + + uPerm = ~uPerm & 0xFFFF; + uCanons[uPerm] = uTruth; + uPhases[uPerm] = i | 16; + uPerms[uPerm] = k; + } + else + assert( uCanons[uPerm] == uTruth ); + } + } + } + uPhases[(1<<16)-1] = 16; + assert( nClasses == 222 ); + free( pPerms4 ); + if ( puCanons ) + *puCanons = uCanons; + else + free( uCanons ); + if ( puPhases ) + *puPhases = uPhases; + else + free( uPhases ); + if ( puPerms ) + *puPerms = uPerms; + else + free( uPerms ); + if ( puMap ) + *puMap = uMap; + else + free( uMap ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darRefact.c b/src/aig/dar/darRefact.c new file mode 100644 index 00000000..a765ec30 --- /dev/null +++ b/src/aig/dar/darRefact.c @@ -0,0 +1,591 @@ +/**CFile**************************************************************** + + FileName [darRefact.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Refactoring.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darRefact.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// the refactoring manager +typedef struct Ref_Man_t_ Ref_Man_t; +struct Ref_Man_t_ +{ + // input data + Dar_RefPar_t * pPars; // rewriting parameters + Aig_Man_t * pAig; // AIG manager + // computed cuts + Vec_Vec_t * vCuts; // the storage for cuts + // truth table and ISOP + Vec_Ptr_t * vTruthElem; // elementary truth tables + Vec_Ptr_t * vTruthStore; // storage for truth tables + Vec_Int_t * vMemory; // storage for ISOP + Vec_Ptr_t * vCutNodes; // storage for internal nodes of the cut + // various data members + Vec_Ptr_t * vLeavesBest; // the best set of leaves + Kit_Graph_t * pGraphBest; // the best factored form + int GainBest; // the best gain + int LevelBest; // the level of node with the best gain + // node statistics + int nNodesInit; // the initial number of nodes + int nNodesTried; // the number of nodes tried + int nNodesBelow; // the number of nodes below the level limit + int nNodesExten; // the number of nodes with extended cut + int nCutsUsed; // the number of rewriting steps + int nCutsTried; // the number of cuts tries + // timing statistics + int timeCuts; + int timeEval; + int timeOther; + int timeTotal; +}; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns the structure with default assignment of parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManDefaultRefParams( Dar_RefPar_t * pPars ) +{ + memset( pPars, 0, sizeof(Dar_RefPar_t) ); + pPars->nMffcMin = 2; // the min MFFC size for which refactoring is used + pPars->nLeafMax = 12; // the max number of leaves of a cut + pPars->nCutsMax = 5; // the max number of cuts to consider + pPars->fUpdateLevel = 0; + pPars->fUseZeros = 0; + pPars->fVerbose = 0; + pPars->fVeryVerbose = 0; +} + +/**Function************************************************************* + + Synopsis [Starts the rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ref_Man_t * Dar_ManRefStart( Aig_Man_t * pAig, Dar_RefPar_t * pPars ) +{ + Ref_Man_t * p; + // start the manager + p = ALLOC( Ref_Man_t, 1 ); + memset( p, 0, sizeof(Ref_Man_t) ); + p->pAig = pAig; + p->pPars = pPars; + // other data + p->vCuts = Vec_VecStart( pPars->nCutsMax ); + p->vTruthElem = Vec_PtrAllocTruthTables( pPars->nLeafMax ); + p->vTruthStore = Vec_PtrAllocSimInfo( 256, Kit_TruthWordNum(pPars->nLeafMax) ); + p->vMemory = Vec_IntAlloc( 1 << 16 ); + p->vCutNodes = Vec_PtrAlloc( 256 ); + p->vLeavesBest = Vec_PtrAlloc( pPars->nLeafMax ); + return p; +} + +/**Function************************************************************* + + Synopsis [Prints out the statistics of the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManRefPrintStats( Ref_Man_t * p ) +{ + int Gain = p->nNodesInit - Aig_ManNodeNum(p->pAig); + printf( "NodesBeg = %8d. NodesEnd = %8d. Gain = %6d. (%6.2f %%).\n", + p->nNodesInit, Aig_ManNodeNum(p->pAig), Gain, 100.0*Gain/p->nNodesInit ); + printf( "Tried = %6d. Below = %5d. Extended = %5d. Used = %5d. Levels = %4d.\n", + p->nNodesTried, p->nNodesBelow, p->nNodesExten, p->nCutsUsed, Aig_ManLevels(p->pAig) ); + PRT( "Cuts ", p->timeCuts ); + PRT( "Eval ", p->timeEval ); + PRT( "Other ", p->timeOther ); + PRT( "TOTAL ", p->timeTotal ); +} + +/**Function************************************************************* + + Synopsis [Stops the rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_ManRefStop( Ref_Man_t * p ) +{ + if ( p->pPars->fVerbose ) + Dar_ManRefPrintStats( p ); + Vec_VecFree( p->vCuts ); + Vec_PtrFree( p->vTruthElem ); + Vec_PtrFree( p->vTruthStore ); + Vec_PtrFree( p->vLeavesBest ); + Vec_IntFree( p->vMemory ); + Vec_PtrFree( p->vCutNodes ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ref_ObjComputeCuts( Aig_Man_t * pAig, Aig_Obj_t * pRoot, Vec_Vec_t * vCuts ) +{ +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ref_ObjPrint( Aig_Obj_t * pObj ) +{ + printf( "%d", pObj? Aig_Regular(pObj)->Id : -1 ); + if ( pObj ) + printf( "(%d) ", Aig_IsComplement(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Counts the number of new nodes added when using this graph.] + + Description [AIG nodes for the fanins should be assigned to pNode->pFunc + of the leaves of the graph before calling this procedure. + Returns -1 if the number of nodes and levels exceeded the given limit or + the number of levels exceeded the maximum allowed level.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_RefactTryGraph( Aig_Man_t * pAig, Aig_Obj_t * pRoot, Vec_Ptr_t * vCut, Kit_Graph_t * pGraph, int NodeMax, int LevelMax ) +{ + Kit_Node_t * pNode, * pNode0, * pNode1; + Aig_Obj_t * pAnd, * pAnd0, * pAnd1; + int i, Counter, LevelNew, LevelOld; + // check for constant function or a literal + if ( Kit_GraphIsConst(pGraph) || Kit_GraphIsVar(pGraph) ) + return 0; + // set the levels of the leaves + Kit_GraphForEachLeaf( pGraph, pNode, i ) + { + pNode->pFunc = Vec_PtrEntry(vCut, i); + pNode->Level = Aig_Regular(pNode->pFunc)->Level; + assert( Aig_Regular(pNode->pFunc)->Level < (1<<14)-1 ); + } +//printf( "Trying:\n" ); + // compute the AIG size after adding the internal nodes + Counter = 0; + Kit_GraphForEachNode( pGraph, pNode, i ) + { + // get the children of this node + pNode0 = Kit_GraphNode( pGraph, pNode->eEdge0.Node ); + pNode1 = Kit_GraphNode( pGraph, pNode->eEdge1.Node ); + // get the AIG nodes corresponding to the children + pAnd0 = pNode0->pFunc; + pAnd1 = pNode1->pFunc; + if ( pAnd0 && pAnd1 ) + { + // if they are both present, find the resulting node + pAnd0 = Aig_NotCond( pAnd0, pNode->eEdge0.fCompl ); + pAnd1 = Aig_NotCond( pAnd1, pNode->eEdge1.fCompl ); + pAnd = Aig_TableLookupTwo( pAig, pAnd0, pAnd1 ); + // return -1 if the node is the same as the original root + if ( Aig_Regular(pAnd) == pRoot ) + return -1; + } + else + pAnd = NULL; + // count the number of added nodes + if ( pAnd == NULL || Aig_ObjIsTravIdCurrent(pAig, Aig_Regular(pAnd)) ) + { + if ( ++Counter > NodeMax ) + return -1; + } + // count the number of new levels + LevelNew = 1 + AIG_MAX( pNode0->Level, pNode1->Level ); + if ( pAnd ) + { + if ( Aig_Regular(pAnd) == Aig_ManConst1(pAig) ) + LevelNew = 0; + else if ( Aig_Regular(pAnd) == Aig_Regular(pAnd0) ) + LevelNew = (int)Aig_Regular(pAnd0)->Level; + else if ( Aig_Regular(pAnd) == Aig_Regular(pAnd1) ) + LevelNew = (int)Aig_Regular(pAnd1)->Level; + LevelOld = (int)Aig_Regular(pAnd)->Level; +// assert( LevelNew == LevelOld ); + } + if ( LevelNew > LevelMax ) + return -1; + pNode->pFunc = pAnd; + pNode->Level = LevelNew; +/* +printf( "Checking " ); +Ref_ObjPrint( pAnd0 ); +printf( " and " ); +Ref_ObjPrint( pAnd1 ); +printf( " Result " ); +Ref_ObjPrint( pNode->pFunc ); +printf( "\n" ); +*/ + } + return Counter; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Dar_RefactBuildGraph( Aig_Man_t * pAig, Vec_Ptr_t * vCut, Kit_Graph_t * pGraph ) +{ + Aig_Obj_t * pAnd0, * pAnd1; + Kit_Node_t * pNode = NULL; + int i; + // check for constant function + if ( Kit_GraphIsConst(pGraph) ) + return Aig_NotCond( Aig_ManConst1(pAig), Kit_GraphIsComplement(pGraph) ); + // set the leaves + Kit_GraphForEachLeaf( pGraph, pNode, i ) + pNode->pFunc = Vec_PtrEntry(vCut, i); + // check for a literal + if ( Kit_GraphIsVar(pGraph) ) + return Aig_NotCond( Kit_GraphVar(pGraph)->pFunc, Kit_GraphIsComplement(pGraph) ); + // build the AIG nodes corresponding to the AND gates of the graph +//printf( "Building (current number %d):\n", Aig_ManObjNumMax(pAig) ); + Kit_GraphForEachNode( pGraph, pNode, i ) + { + pAnd0 = Aig_NotCond( Kit_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl ); + pAnd1 = Aig_NotCond( Kit_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl ); + pNode->pFunc = Aig_And( pAig, pAnd0, pAnd1 ); +/* +printf( "Checking " ); +Ref_ObjPrint( pAnd0 ); +printf( " and " ); +Ref_ObjPrint( pAnd1 ); +printf( " Result " ); +Ref_ObjPrint( pNode->pFunc ); +printf( "\n" ); +*/ + } + // complement the result if necessary + return Aig_NotCond( pNode->pFunc, Kit_GraphIsComplement(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_ManRefactorTryCuts( Ref_Man_t * p, Aig_Obj_t * pObj, int nNodesSaved, int Required ) +{ + Vec_Ptr_t * vCut; + Kit_Graph_t * pGraphCur; + int k, RetValue, GainCur, nNodesAdded; + unsigned * pTruth; + + p->GainBest = -1; + p->pGraphBest = NULL; + Vec_VecForEachLevel( p->vCuts, vCut, k ) + { + if ( Vec_PtrSize(vCut) == 0 ) + continue; +// if ( Vec_PtrSize(vCut) != 0 && Vec_PtrSize(Vec_VecEntry(p->vCuts, k+1)) != 0 ) +// continue; + + p->nCutsTried++; + // get the cut nodes + Aig_ObjCollectCut( pObj, vCut, p->vCutNodes ); + // get the truth table + pTruth = Aig_ManCutTruth( pObj, vCut, p->vCutNodes, p->vTruthElem, p->vTruthStore ); + if ( Kit_TruthIsConst0(pTruth, Vec_PtrSize(vCut)) ) + { + p->GainBest = Vec_PtrSize(p->vCutNodes); + p->pGraphBest = Kit_GraphCreateConst0(); + Vec_PtrCopy( p->vLeavesBest, vCut ); + return p->GainBest; + } + if ( Kit_TruthIsConst1(pTruth, Vec_PtrSize(vCut)) ) + { + p->GainBest = Vec_PtrSize(p->vCutNodes); + p->pGraphBest = Kit_GraphCreateConst1(); + Vec_PtrCopy( p->vLeavesBest, vCut ); + return p->GainBest; + } + + // try the positive phase + RetValue = Kit_TruthIsop( pTruth, Vec_PtrSize(vCut), p->vMemory, 0 ); + if ( RetValue > -1 ) + { + pGraphCur = Kit_SopFactor( p->vMemory, 0, Vec_PtrSize(vCut), p->vMemory ); + nNodesAdded = Dar_RefactTryGraph( p->pAig, pObj, vCut, pGraphCur, nNodesSaved - !p->pPars->fUseZeros, Required ); + if ( nNodesAdded > -1 ) + { + GainCur = nNodesSaved - nNodesAdded; + if ( p->GainBest < GainCur || (p->GainBest == GainCur && + (Kit_GraphIsConst(pGraphCur) || Kit_GraphRootLevel(pGraphCur) < Kit_GraphRootLevel(p->pGraphBest))) ) + { + p->GainBest = GainCur; + if ( p->pGraphBest ) + Kit_GraphFree( p->pGraphBest ); + p->pGraphBest = pGraphCur; + Vec_PtrCopy( p->vLeavesBest, vCut ); + } + else + Kit_GraphFree( pGraphCur ); + } + else + Kit_GraphFree( pGraphCur ); + } + // try negative phase + Kit_TruthNot( pTruth, pTruth, Vec_PtrSize(vCut) ); + RetValue = Kit_TruthIsop( pTruth, Vec_PtrSize(vCut), p->vMemory, 0 ); + if ( RetValue > -1 ) + { + pGraphCur = Kit_SopFactor( p->vMemory, 1, Vec_PtrSize(vCut), p->vMemory ); + nNodesAdded = Dar_RefactTryGraph( p->pAig, pObj, vCut, pGraphCur, nNodesSaved - !p->pPars->fUseZeros, Required ); + if ( nNodesAdded > -1 ) + { + GainCur = nNodesSaved - nNodesAdded; + if ( p->GainBest < GainCur || (p->GainBest == GainCur && + (Kit_GraphIsConst(pGraphCur) || Kit_GraphRootLevel(pGraphCur) < Kit_GraphRootLevel(p->pGraphBest))) ) + { + p->GainBest = GainCur; + if ( p->pGraphBest ) + Kit_GraphFree( p->pGraphBest ); + p->pGraphBest = pGraphCur; + Vec_PtrCopy( p->vLeavesBest, vCut ); + } + else + Kit_GraphFree( pGraphCur ); + } + else + Kit_GraphFree( pGraphCur ); + } + } + return p->GainBest; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if a non-PI node has nLevelMin or below.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_ObjCutLevelAchieved( Vec_Ptr_t * vCut, int nLevelMin ) +{ + Aig_Obj_t * pObj; + int i; + Vec_PtrForEachEntry( vCut, pObj, i ) + if ( !Aig_ObjIsPi(pObj) && (int)pObj->Level <= nLevelMin ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_ManRefactor( Aig_Man_t * pAig, Dar_RefPar_t * pPars ) +{ +// Bar_Progress_t * pProgress; + Ref_Man_t * p; + Vec_Ptr_t * vCut, * vCut2; + Aig_Obj_t * pObj, * pObjNew; + int nNodesOld, nNodeBefore, nNodeAfter, nNodesSaved, nNodesSaved2; + int i, Required, nLevelMin, clkStart, clk; + + // start the manager + p = Dar_ManRefStart( pAig, pPars ); + // remove dangling nodes + Aig_ManCleanup( pAig ); + // if updating levels is requested, start fanout and timing + Aig_ManFanoutStart( pAig ); + if ( p->pPars->fUpdateLevel ) + Aig_ManStartReverseLevels( pAig, 0 ); + + // resynthesize each node once + clkStart = clock(); + vCut = Vec_VecEntry( p->vCuts, 0 ); + vCut2 = Vec_VecEntry( p->vCuts, 1 ); + p->nNodesInit = Aig_ManNodeNum(pAig); + nNodesOld = Vec_PtrSize( pAig->vObjs ); +// pProgress = Bar_ProgressStart( stdout, nNodesOld ); + Aig_ManForEachObj( pAig, pObj, i ) + { +// Bar_ProgressUpdate( pProgress, i, NULL ); + if ( !Aig_ObjIsNode(pObj) ) + continue; + if ( i > nNodesOld ) + break; + Vec_VecClear( p->vCuts ); + +//printf( "\nConsidering node %d.\n", pObj->Id ); + // get the bounded MFFC size +clk = clock(); + nLevelMin = AIG_MAX( 0, Aig_ObjLevel(pObj) - 10 ); + nNodesSaved = Aig_NodeMffsSupp( pAig, pObj, nLevelMin, vCut ); + if ( nNodesSaved < p->pPars->nMffcMin ) // too small to consider + { +p->timeCuts += clock() - clk; + continue; + } + p->nNodesTried++; + if ( Vec_PtrSize(vCut) > p->pPars->nLeafMax ) // get one reconv-driven cut + { + Aig_ManFindCut( pObj, vCut, p->vCutNodes, p->pPars->nLeafMax, 50 ); + nNodesSaved = Aig_NodeMffsLabelCut( p->pAig, pObj, vCut ); + } + else if ( Vec_PtrSize(vCut) < p->pPars->nLeafMax - 2 && p->pPars->fExtend ) + { + if ( !Dar_ObjCutLevelAchieved(vCut, nLevelMin) ) + { + if ( Aig_NodeMffsExtendCut( pAig, pObj, vCut, vCut2 ) ) + { + nNodesSaved2 = Aig_NodeMffsLabelCut( p->pAig, pObj, vCut ); + assert( nNodesSaved2 == nNodesSaved ); + } + if ( Vec_PtrSize(vCut2) > p->pPars->nLeafMax ) + Vec_PtrClear(vCut2); + if ( Vec_PtrSize(vCut2) > 0 ) + { + p->nNodesExten++; +// printf( "%d(%d) ", Vec_PtrSize(vCut), Vec_PtrSize(vCut2) ); + } + } + else + p->nNodesBelow++; + } +p->timeCuts += clock() - clk; + + // try the cuts +clk = clock(); + Required = pAig->vLevelR? Aig_ObjRequiredLevel(pAig, pObj) : AIG_INFINITY; + Dar_ManRefactorTryCuts( p, pObj, nNodesSaved, Required ); +p->timeEval += clock() - clk; + + // check the best gain + if ( !(p->GainBest > 0 || (p->GainBest == 0 && p->pPars->fUseZeros)) ) + { + if ( p->pGraphBest ) + Kit_GraphFree( p->pGraphBest ); + continue; + } +//printf( "\n" ); + + // if we end up here, a rewriting step is accepted + nNodeBefore = Aig_ManNodeNum( pAig ); + pObjNew = Dar_RefactBuildGraph( pAig, p->vLeavesBest, p->pGraphBest ); + assert( (int)Aig_Regular(pObjNew)->Level <= Required ); + // replace the node + Aig_ObjReplace( pAig, pObj, pObjNew, 1, p->pPars->fUpdateLevel ); + // compare the gains + nNodeAfter = Aig_ManNodeNum( pAig ); + assert( p->GainBest <= nNodeBefore - nNodeAfter ); + Kit_GraphFree( p->pGraphBest ); + p->nCutsUsed++; +// break; + } +p->timeTotal = clock() - clkStart; +p->timeOther = p->timeTotal - p->timeCuts - p->timeEval; + +// Bar_ProgressStop( pProgress ); + // put the nodes into the DFS order and reassign their IDs +// Aig_NtkReassignIds( p ); + // fix the levels + Aig_ManFanoutStop( pAig ); + if ( p->pPars->fUpdateLevel ) + Aig_ManStopReverseLevels( pAig ); + + // stop the rewriting manager + Dar_ManRefStop( p ); + Aig_ManCheckPhase( pAig ); + if ( !Aig_ManCheck( pAig ) ) + { + printf( "Dar_ManRefactor: The network check has failed.\n" ); + return 0; + } + return 1; + +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darResub.c b/src/aig/dar/darResub.c new file mode 100644 index 00000000..f819934e --- /dev/null +++ b/src/aig/dar/darResub.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [darResub.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darResub.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/darScript.c b/src/aig/dar/darScript.c new file mode 100644 index 00000000..530e913e --- /dev/null +++ b/src/aig/dar/darScript.c @@ -0,0 +1,393 @@ +/**CFile**************************************************************** + + FileName [darScript.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [Rewriting scripts.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: darScript.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" +//#include "ioa.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs one iteration of AIG rewriting.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Dar_ManRewriteDefault( Aig_Man_t * pAig ) +{ + Aig_Man_t * pTemp; + Dar_RwrPar_t Pars, * pPars = &Pars; + Dar_ManDefaultRwrParams( pPars ); + pAig = Aig_ManDup( pAig, 0 ); + Dar_ManRewrite( pAig, pPars ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + return pAig; +} + +/**Function************************************************************* + + Synopsis [Reproduces script "compress2".] + + Description [] + + SideEffects [This procedure does not tighten level during restructuring.] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Dar_ManRwsat( Aig_Man_t * pAig, int fBalance, int fVerbose ) +//alias rwsat "st; rw -l; b -l; rw -l; rf -l" +{ + Aig_Man_t * pTemp; + + Dar_RwrPar_t ParsRwr, * pParsRwr = &ParsRwr; + Dar_RefPar_t ParsRef, * pParsRef = &ParsRef; + + Dar_ManDefaultRwrParams( pParsRwr ); + Dar_ManDefaultRefParams( pParsRef ); + + pParsRwr->fUpdateLevel = 0; + pParsRef->fUpdateLevel = 0; + + pParsRwr->fVerbose = fVerbose; + pParsRef->fVerbose = fVerbose; + + pAig = Aig_ManDup( pAig, 0 ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // refactor + Dar_ManRefactor( pAig, pParsRef ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance + if ( fBalance ) + { + pAig = Dar_ManBalance( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + return pAig; +} + + +/**Function************************************************************* + + Synopsis [Reproduces script "compress".] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Dar_ManCompress( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ) +//alias compress2 "b -l; rw -l; rwz -l; b -l; rwz -l; b -l" +{ + Aig_Man_t * pTemp; + + Dar_RwrPar_t ParsRwr, * pParsRwr = &ParsRwr; + Dar_RefPar_t ParsRef, * pParsRef = &ParsRef; + + Dar_ManDefaultRwrParams( pParsRwr ); + Dar_ManDefaultRefParams( pParsRef ); + + pParsRwr->fUpdateLevel = fUpdateLevel; + pParsRef->fUpdateLevel = fUpdateLevel; + + pParsRwr->fVerbose = 0;//fVerbose; + pParsRef->fVerbose = 0;//fVerbose; + + pAig = Aig_ManDup( pAig, 0 ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance + if ( fBalance ) + { +// pAig = Dar_ManBalance( pTemp = pAig, fUpdateLevel ); +// Aig_ManStop( pTemp ); +// if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // refactor + Dar_ManRefactor( pAig, pParsRef ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance + if ( fBalance ) + { + pAig = Dar_ManBalance( pTemp = pAig, fUpdateLevel ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + + pParsRwr->fUseZeros = 1; + pParsRef->fUseZeros = 1; + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + return pAig; +} + +/**Function************************************************************* + + Synopsis [Reproduces script "compress2".] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Dar_ManCompress2( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ) +//alias compress2 "b -l; rw -l; rf -l; b -l; rw -l; rwz -l; b -l; rfz -l; rwz -l; b -l" +{ + Aig_Man_t * pTemp; + + Dar_RwrPar_t ParsRwr, * pParsRwr = &ParsRwr; + Dar_RefPar_t ParsRef, * pParsRef = &ParsRef; + + Dar_ManDefaultRwrParams( pParsRwr ); + Dar_ManDefaultRefParams( pParsRef ); + + pParsRwr->fUpdateLevel = fUpdateLevel; + pParsRef->fUpdateLevel = fUpdateLevel; + + pParsRwr->fVerbose = 0;//fVerbose; + pParsRef->fVerbose = 0;//fVerbose; + + pAig = Aig_ManDup( pAig, 0 ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance + if ( fBalance ) + { +// pAig = Dar_ManBalance( pTemp = pAig, fUpdateLevel ); +// Aig_ManStop( pTemp ); +// if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // refactor + Dar_ManRefactor( pAig, pParsRef ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance +// if ( fBalance ) + { + pAig = Dar_ManBalance( pTemp = pAig, fUpdateLevel ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + pParsRwr->fUseZeros = 1; + pParsRef->fUseZeros = 1; + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance + if ( fBalance ) + { + pAig = Dar_ManBalance( pTemp = pAig, fUpdateLevel ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + + // refactor + Dar_ManRefactor( pAig, pParsRef ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // rewrite + Dar_ManRewrite( pAig, pParsRwr ); + pAig = Aig_ManDup( pTemp = pAig, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + + // balance + if ( fBalance ) + { + pAig = Dar_ManBalance( pTemp = pAig, fUpdateLevel ); + Aig_ManStop( pTemp ); + if ( fVerbose ) Aig_ManPrintStats( pAig ); + } + return pAig; +} + +/**Function************************************************************* + + Synopsis [Reproduces script "compress2".] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Dar_ManChoiceSynthesis( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ) +//alias resyn "b; rw; rwz; b; rwz; b" +//alias resyn2 "b; rw; rf; b; rw; rwz; b; rfz; rwz; b" +{ + Vec_Ptr_t * vAigs; + vAigs = Vec_PtrAlloc( 3 ); + pAig = Aig_ManDup(pAig, 0); + Vec_PtrPush( vAigs, pAig ); + pAig = Dar_ManCompress (pAig, 0, fUpdateLevel, fVerbose); + Vec_PtrPush( vAigs, pAig ); + pAig = Dar_ManCompress2(pAig, fBalance, fUpdateLevel, fVerbose); + Vec_PtrPush( vAigs, pAig ); + return vAigs; +} + +/**Function************************************************************* + + Synopsis [Gives the current ABC network to AIG manager for processing.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +/* +Vec_Ptr_t * Dar_ManChoiceSynthesisExt() +{ + Vec_Ptr_t * vAigs; + Aig_Man_t * pMan; + vAigs = Vec_PtrAlloc( 3 ); + pMan = Ioa_ReadAiger( "i10_1.aig", 1 ); + Vec_PtrPush( vAigs, pMan ); + pMan = Ioa_ReadAiger( "i10_2.aig", 1 ); + Vec_PtrPush( vAigs, pMan ); + pMan = Ioa_ReadAiger( "i10_3.aig", 1 ); + Vec_PtrPush( vAigs, pMan ); + return vAigs; +} +*/ + +/**Function************************************************************* + + Synopsis [Reproduces script "compress2".] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Dar_ManChoice( Aig_Man_t * pAig, int fBalance, int fUpdateLevel, int fVerbose ) +{ + Aig_Man_t * pMan, * pTemp; + Vec_Ptr_t * vAigs; + int i, clk; + +clk = clock(); +// vAigs = Dar_ManChoiceSynthesisExt(); + vAigs = Dar_ManChoiceSynthesis( pAig, fBalance, fUpdateLevel, fVerbose ); + + // swap the first and last network + // this should lead to the primary choice being "better" because of synthesis + pMan = Vec_PtrPop( vAigs ); + Vec_PtrPush( vAigs, Vec_PtrEntry(vAigs,0) ); + Vec_PtrWriteEntry( vAigs, 0, pMan ); + +if ( fVerbose ) +{ +PRT( "Synthesis time", clock() - clk ); +} +clk = clock(); + pMan = Aig_ManChoicePartitioned( vAigs, 300, fVerbose ); + Vec_PtrForEachEntry( vAigs, pTemp, i ) + Aig_ManStop( pTemp ); + Vec_PtrFree( vAigs ); +if ( fVerbose ) +{ +PRT( "Choicing time ", clock() - clk ); +} + return pMan; +// return NULL; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/dar_.c b/src/aig/dar/dar_.c new file mode 100644 index 00000000..12fd7d17 --- /dev/null +++ b/src/aig/dar/dar_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [dar_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: dar_.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "darInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/dar/module.make b/src/aig/dar/module.make new file mode 100644 index 00000000..b1b0332c --- /dev/null +++ b/src/aig/dar/module.make @@ -0,0 +1,10 @@ +SRC += src/aig/dar/darBalance.c \ + src/aig/dar/darCore.c \ + src/aig/dar/darCut.c \ + src/aig/dar/darData.c \ + src/aig/dar/darLib.c \ + src/aig/dar/darMan.c \ + src/aig/dar/darPrec.c \ + src/aig/dar/darRefact.c \ + src/aig/dar/darResub.c \ + src/aig/dar/darScript.c diff --git a/src/aig/deco/deco.h b/src/aig/deco/deco.h new file mode 100644 index 00000000..67126902 --- /dev/null +++ b/src/aig/deco/deco.h @@ -0,0 +1,703 @@ +/**CFile**************************************************************** + + FileName [deco.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [A simple decomposition tree/node data structure and its APIs.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: deco.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __DEC_H__ +#define __DEC_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Dec_Edge_t_ Dec_Edge_t; +struct Dec_Edge_t_ +{ + unsigned fCompl : 1; // the complemented bit + unsigned Node : 30; // the decomposition node pointed by the edge +}; + +typedef struct Dec_Node_t_ Dec_Node_t; +struct Dec_Node_t_ +{ + Dec_Edge_t eEdge0; // the left child of the node + Dec_Edge_t eEdge1; // the right child of the node + // other info + void * pFunc; // the function of the node (BDD or AIG) + unsigned Level : 14; // the level of this node in the global AIG + // printing info + unsigned fNodeOr : 1; // marks the original OR node + unsigned fCompl0 : 1; // marks the original complemented edge + unsigned fCompl1 : 1; // marks the original complemented edge + // latch info + unsigned nLat0 : 5; // the number of latches on the first edge + unsigned nLat1 : 5; // the number of latches on the second edge + unsigned nLat2 : 5; // the number of latches on the output edge +}; + +typedef struct Dec_Graph_t_ Dec_Graph_t; +struct Dec_Graph_t_ +{ + int fConst; // marks the constant 1 graph + int nLeaves; // the number of leaves + int nSize; // the number of nodes (including the leaves) + int nCap; // the number of allocated nodes + Dec_Node_t * pNodes; // the array of leaves and internal nodes + Dec_Edge_t eRoot; // the pointer to the topmost node +}; + +typedef struct Dec_Man_t_ Dec_Man_t; +struct Dec_Man_t_ +{ + void * pMvcMem; // memory manager for MVC cover (used for factoring) + Vec_Int_t * vCubes; // storage for cubes + Vec_Int_t * vLits; // storage for literals + // precomputation information about 4-variable functions + unsigned short * puCanons; // canonical forms + char * pPhases; // canonical phases + char * pPerms; // canonical permutations + unsigned char * pMap; // mapping of functions into class numbers +}; + + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// interator throught the leaves +#define Dec_GraphForEachLeaf( pGraph, pLeaf, i ) \ + for ( i = 0; (i < (pGraph)->nLeaves) && (((pLeaf) = Dec_GraphNode(pGraph, i)), 1); i++ ) +// interator throught the internal nodes +#define Dec_GraphForEachNode( pGraph, pAnd, i ) \ + for ( i = (pGraph)->nLeaves; (i < (pGraph)->nSize) && (((pAnd) = Dec_GraphNode(pGraph, i)), 1); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Creates an edge pointing to the node in the given polarity.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_EdgeCreate( int Node, int fCompl ) +{ + Dec_Edge_t eEdge = { fCompl, Node }; + return eEdge; +} + +/**Function************************************************************* + + Synopsis [Converts the edge into unsigned integer.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dec_EdgeToInt( Dec_Edge_t eEdge ) +{ + return (eEdge.Node << 1) | eEdge.fCompl; +} + +/**Function************************************************************* + + Synopsis [Converts unsigned integer into the edge.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_IntToEdge( unsigned Edge ) +{ + return Dec_EdgeCreate( Edge >> 1, Edge & 1 ); +} + +/**Function************************************************************* + + Synopsis [Converts the edge into unsigned integer.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Dec_EdgeToInt_( Dec_Edge_t eEdge ) +{ + return *(unsigned *)&eEdge; +} + +/**Function************************************************************* + + Synopsis [Converts unsigned integer into the edge.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_IntToEdge_( unsigned Edge ) +{ + return *(Dec_Edge_t *)&Edge; +} + +/**Function************************************************************* + + Synopsis [Creates a graph with the given number of leaves.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Graph_t * Dec_GraphCreate( int nLeaves ) +{ + Dec_Graph_t * pGraph; + pGraph = ALLOC( Dec_Graph_t, 1 ); + memset( pGraph, 0, sizeof(Dec_Graph_t) ); + pGraph->nLeaves = nLeaves; + pGraph->nSize = nLeaves; + pGraph->nCap = 2 * nLeaves + 50; + pGraph->pNodes = ALLOC( Dec_Node_t, pGraph->nCap ); + memset( pGraph->pNodes, 0, sizeof(Dec_Node_t) * pGraph->nSize ); + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates constant 0 graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Graph_t * Dec_GraphCreateConst0() +{ + Dec_Graph_t * pGraph; + pGraph = ALLOC( Dec_Graph_t, 1 ); + memset( pGraph, 0, sizeof(Dec_Graph_t) ); + pGraph->fConst = 1; + pGraph->eRoot.fCompl = 1; + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates constant 1 graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Graph_t * Dec_GraphCreateConst1() +{ + Dec_Graph_t * pGraph; + pGraph = ALLOC( Dec_Graph_t, 1 ); + memset( pGraph, 0, sizeof(Dec_Graph_t) ); + pGraph->fConst = 1; + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates the literal graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Graph_t * Dec_GraphCreateLeaf( int iLeaf, int nLeaves, int fCompl ) +{ + Dec_Graph_t * pGraph; + assert( 0 <= iLeaf && iLeaf < nLeaves ); + pGraph = Dec_GraphCreate( nLeaves ); + pGraph->eRoot.Node = iLeaf; + pGraph->eRoot.fCompl = fCompl; + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates a graph with the given number of leaves.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Dec_GraphFree( Dec_Graph_t * pGraph ) +{ + FREE( pGraph->pNodes ); + free( pGraph ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the graph is a constant.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphIsConst( Dec_Graph_t * pGraph ) +{ + return pGraph->fConst; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the graph is constant 0.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphIsConst0( Dec_Graph_t * pGraph ) +{ + return pGraph->fConst && pGraph->eRoot.fCompl; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the graph is constant 1.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphIsConst1( Dec_Graph_t * pGraph ) +{ + return pGraph->fConst && !pGraph->eRoot.fCompl; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the graph is complemented.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphIsComplement( Dec_Graph_t * pGraph ) +{ + return pGraph->eRoot.fCompl; +} + +/**Function************************************************************* + + Synopsis [Checks if the graph is complemented.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Dec_GraphComplement( Dec_Graph_t * pGraph ) +{ + pGraph->eRoot.fCompl ^= 1; +} + + +/**Function************************************************************* + + Synopsis [Returns the number of leaves.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphLeaveNum( Dec_Graph_t * pGraph ) +{ + return pGraph->nLeaves; +} + +/**Function************************************************************* + + Synopsis [Returns the number of internal nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphNodeNum( Dec_Graph_t * pGraph ) +{ + return pGraph->nSize - pGraph->nLeaves; +} + +/**Function************************************************************* + + Synopsis [Returns the pointer to the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Node_t * Dec_GraphNode( Dec_Graph_t * pGraph, int i ) +{ + return pGraph->pNodes + i; +} + +/**Function************************************************************* + + Synopsis [Returns the pointer to the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Node_t * Dec_GraphNodeLast( Dec_Graph_t * pGraph ) +{ + return pGraph->pNodes + pGraph->nSize - 1; +} + +/**Function************************************************************* + + Synopsis [Returns the number of the given node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphNodeInt( Dec_Graph_t * pGraph, Dec_Node_t * pNode ) +{ + return pNode - pGraph->pNodes; +} + +/**Function************************************************************* + + Synopsis [Check if the graph represents elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphIsVar( Dec_Graph_t * pGraph ) +{ + return pGraph->eRoot.Node < (unsigned)pGraph->nLeaves; +} + +/**Function************************************************************* + + Synopsis [Check if the graph represents elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphNodeIsVar( Dec_Graph_t * pGraph, Dec_Node_t * pNode ) +{ + return Dec_GraphNodeInt(pGraph,pNode) < pGraph->nLeaves; +} + +/**Function************************************************************* + + Synopsis [Returns the elementary variable elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Node_t * Dec_GraphVar( Dec_Graph_t * pGraph ) +{ + assert( Dec_GraphIsVar( pGraph ) ); + return Dec_GraphNode( pGraph, pGraph->eRoot.Node ); +} + +/**Function************************************************************* + + Synopsis [Returns the number of the elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Dec_GraphVarInt( Dec_Graph_t * pGraph ) +{ + assert( Dec_GraphIsVar( pGraph ) ); + return Dec_GraphNodeInt( pGraph, Dec_GraphVar(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [Sets the root of the graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Dec_GraphSetRoot( Dec_Graph_t * pGraph, Dec_Edge_t eRoot ) +{ + pGraph->eRoot = eRoot; +} + +/**Function************************************************************* + + Synopsis [Appends a new node to the graph.] + + Description [This procedure is meant for internal use.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Node_t * Dec_GraphAppendNode( Dec_Graph_t * pGraph ) +{ + Dec_Node_t * pNode; + if ( pGraph->nSize == pGraph->nCap ) + { + pGraph->pNodes = REALLOC( Dec_Node_t, pGraph->pNodes, 2 * pGraph->nCap ); + pGraph->nCap = 2 * pGraph->nCap; + } + pNode = pGraph->pNodes + pGraph->nSize++; + memset( pNode, 0, sizeof(Dec_Node_t) ); + return pNode; +} + +/**Function************************************************************* + + Synopsis [Creates an AND node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_GraphAddNodeAnd( Dec_Graph_t * pGraph, Dec_Edge_t eEdge0, Dec_Edge_t eEdge1 ) +{ + Dec_Node_t * pNode; + // get the new node + pNode = Dec_GraphAppendNode( pGraph ); + // set the inputs and other info + pNode->eEdge0 = eEdge0; + pNode->eEdge1 = eEdge1; + pNode->fCompl0 = eEdge0.fCompl; + pNode->fCompl1 = eEdge1.fCompl; + return Dec_EdgeCreate( pGraph->nSize - 1, 0 ); +} + +/**Function************************************************************* + + Synopsis [Creates an OR node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_GraphAddNodeOr( Dec_Graph_t * pGraph, Dec_Edge_t eEdge0, Dec_Edge_t eEdge1 ) +{ + Dec_Node_t * pNode; + // get the new node + pNode = Dec_GraphAppendNode( pGraph ); + // set the inputs and other info + pNode->eEdge0 = eEdge0; + pNode->eEdge1 = eEdge1; + pNode->fCompl0 = eEdge0.fCompl; + pNode->fCompl1 = eEdge1.fCompl; + // make adjustments for the OR gate + pNode->fNodeOr = 1; + pNode->eEdge0.fCompl = !pNode->eEdge0.fCompl; + pNode->eEdge1.fCompl = !pNode->eEdge1.fCompl; + return Dec_EdgeCreate( pGraph->nSize - 1, 1 ); +} + +/**Function************************************************************* + + Synopsis [Creates an XOR node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_GraphAddNodeXor( Dec_Graph_t * pGraph, Dec_Edge_t eEdge0, Dec_Edge_t eEdge1, int Type ) +{ + Dec_Edge_t eNode0, eNode1, eNode; + if ( Type == 0 ) + { + // derive the first AND + eEdge0.fCompl ^= 1; + eNode0 = Dec_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + eEdge0.fCompl ^= 1; + // derive the second AND + eEdge1.fCompl ^= 1; + eNode1 = Dec_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + // derive the final OR + eNode = Dec_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + } + else + { + // derive the first AND + eNode0 = Dec_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + // derive the second AND + eEdge0.fCompl ^= 1; + eEdge1.fCompl ^= 1; + eNode1 = Dec_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + // derive the final OR + eNode = Dec_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + eNode.fCompl ^= 1; + } + return eNode; +} + +/**Function************************************************************* + + Synopsis [Creates an XOR node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Dec_Edge_t Dec_GraphAddNodeMux( Dec_Graph_t * pGraph, Dec_Edge_t eEdgeC, Dec_Edge_t eEdgeT, Dec_Edge_t eEdgeE, int Type ) +{ + Dec_Edge_t eNode0, eNode1, eNode; + if ( Type == 0 ) + { + // derive the first AND + eNode0 = Dec_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeT ); + // derive the second AND + eEdgeC.fCompl ^= 1; + eNode1 = Dec_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeE ); + // derive the final OR + eNode = Dec_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + } + else + { + // complement the arguments + eEdgeT.fCompl ^= 1; + eEdgeE.fCompl ^= 1; + // derive the first AND + eNode0 = Dec_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeT ); + // derive the second AND + eEdgeC.fCompl ^= 1; + eNode1 = Dec_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeE ); + // derive the final OR + eNode = Dec_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + eNode.fCompl ^= 1; + } + return eNode; +} + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/deco/module.make b/src/aig/deco/module.make new file mode 100644 index 00000000..d6d908e7 --- /dev/null +++ b/src/aig/deco/module.make @@ -0,0 +1 @@ +SRC += diff --git a/src/aig/fra/fra.h b/src/aig/fra/fra.h new file mode 100644 index 00000000..0de803ed --- /dev/null +++ b/src/aig/fra/fra.h @@ -0,0 +1,305 @@ +/**CFile**************************************************************** + + FileName [fra.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [[New FRAIG package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fra.h,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __FRA_H__ +#define __FRA_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +#include "vec.h" +#include "aig.h" +#include "dar.h" +#include "satSolver.h" +//#include "bar.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Fra_Par_t_ Fra_Par_t; +typedef struct Fra_Man_t_ Fra_Man_t; +typedef struct Fra_Cla_t_ Fra_Cla_t; +typedef struct Fra_Sml_t_ Fra_Sml_t; +typedef struct Fra_Bmc_t_ Fra_Bmc_t; + +// FRAIG parameters +struct Fra_Par_t_ +{ + int nSimWords; // the number of words in the simulation info + double dSimSatur; // the ratio of refined classes when saturation is reached + int fPatScores; // enables simulation pattern scoring + int MaxScore; // max score after which resimulation is used + double dActConeRatio; // the ratio of cone to be bumped + double dActConeBumpMax; // the largest bump in activity + int fChoicing; // enables choicing + int fSpeculate; // use speculative reduction + int fProve; // prove the miter outputs + int fVerbose; // verbose output + int fDoSparse; // skip sparse functions + int fConeBias; // bias variables in the cone (good for unsat runs) + int nBTLimitNode; // conflict limit at a node + int nBTLimitMiter; // conflict limit at an output + int nFramesP; // the number of timeframes to in the prefix + int nFramesK; // the number of timeframes to unroll + int nMaxImps; // the maximum number of implications to consider + int fRewrite; // use rewriting for constraint reduction + int fLatchCorr; // computes latch correspondence only + int fUseImps; // use implications + int fWriteImps; // record implications + int fDontShowBar; // does not show progressbar during fraiging +}; + +// FRAIG equivalence classes +struct Fra_Cla_t_ +{ + Aig_Man_t * pAig; // the original AIG manager + Aig_Obj_t ** pMemRepr; // pointers to representatives of each node + Vec_Ptr_t * vClasses; // equivalence classes + Vec_Ptr_t * vClasses1; // equivalence class of Const1 node + Vec_Ptr_t * vClassesTemp; // temporary storage for new classes + Aig_Obj_t ** pMemClasses; // memory allocated for equivalence classes + Aig_Obj_t ** pMemClassesFree; // memory allocated for equivalence classes to be used + Vec_Ptr_t * vClassOld; // old equivalence class after splitting + Vec_Ptr_t * vClassNew; // new equivalence class(es) after splitting + int nPairs; // the number of pairs of nodes + int fRefinement; // set to 1 when refinement has happened + Vec_Int_t * vImps; // implications + // procedures used for class refinement + int (*pFuncNodeHash) (Aig_Obj_t *, int); // returns has key of the node + int (*pFuncNodeIsConst) (Aig_Obj_t *); // returns 1 if the node is a constant + int (*pFuncNodesAreEqual)(Aig_Obj_t *, Aig_Obj_t *); // returns 1 if nodes are equal up to a complement +}; + +// simulation manager +struct Fra_Sml_t_ +{ + Aig_Man_t * pAig; // the original AIG manager + int nPref; // the number of times frames in the prefix + int nFrames; // the number of times frames + int nWordsFrame; // the number of words in each time frame + int nWordsTotal; // the total number of words at a node + int nWordsPref; // the number of word in the prefix + int fNonConstOut; // have seen a non-const-0 output during simulation + int nSimRounds; // statistics + int timeSim; // statistics + unsigned pData[0]; // simulation data for the nodes +}; + +// FRAIG manager +struct Fra_Man_t_ +{ + // high-level data + Fra_Par_t * pPars; // parameters governing fraiging + // AIG managers + Aig_Man_t * pManAig; // the starting AIG manager + Aig_Man_t * pManFraig; // the final AIG manager + // mapping AIG into FRAIG + int nFramesAll; // the number of timeframes used + Aig_Obj_t ** pMemFraig; // memory allocated for points to the fraig nodes + int nSizeAlloc; // allocated size of the arrays for timeframe nodes + // equivalence classes + Fra_Cla_t * pCla; // representation of (candidate) equivalent nodes + // simulation info + Fra_Sml_t * pSml; // simulation manager + // bounded model checking manager + Fra_Bmc_t * pBmc; + // counter example storage + int nPatWords; // the number of words in the counter example + unsigned * pPatWords; // the counter example + Vec_Int_t * vCex; + // satisfiability solving + sat_solver * pSat; // SAT solver + int nSatVars; // the number of variables currently used + Vec_Ptr_t * vPiVars; // the PIs of the cone used + sint64 nBTLimitGlobal; // resource limit + sint64 nInsLimitGlobal; // resource limit + Vec_Ptr_t ** pMemFanins; // the arrays of fanins for some FRAIG nodes + int * pMemSatNums; // the array of SAT numbers for some FRAIG nodes + int nMemAlloc; // allocated size of the arrays for FRAIG varnums and fanins + Vec_Ptr_t * vTimeouts; // the nodes, for which equivalence checking timed out + // statistics + int nSimRounds; + int nNodesMiter; + int nLitsBeg; + int nLitsEnd; + int nNodesBeg; + int nNodesEnd; + int nRegsBeg; + int nRegsEnd; + int nSatCalls; + int nSatCallsSat; + int nSatCallsUnsat; + int nSatProof; + int nSatFails; + int nSatFailsReal; + int nSpeculs; + int nChoices; + int nChoicesFake; + int nSatCallsRecent; + int nSatCallsSkipped; + // runtime + int timeSim; + int timeTrav; + int timeRwr; + int timeSat; + int timeSatUnsat; + int timeSatSat; + int timeSatFail; + int timeRef; + int timeTotal; + int time1; + int time2; +}; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +static inline unsigned * Fra_ObjSim( Fra_Sml_t * p, int Id ) { return p->pData + p->nWordsTotal * Id; } +static inline unsigned Fra_ObjRandomSim() { return (rand() << 24) ^ (rand() << 12) ^ rand(); } + +static inline Aig_Obj_t * Fra_ObjFraig( Aig_Obj_t * pObj, int i ) { return ((Fra_Man_t *)pObj->pData)->pMemFraig[((Fra_Man_t *)pObj->pData)->nFramesAll*pObj->Id + i]; } +static inline void Fra_ObjSetFraig( Aig_Obj_t * pObj, int i, Aig_Obj_t * pNode ) { ((Fra_Man_t *)pObj->pData)->pMemFraig[((Fra_Man_t *)pObj->pData)->nFramesAll*pObj->Id + i] = pNode; } + +static inline Vec_Ptr_t * Fra_ObjFaninVec( Aig_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pMemFanins[pObj->Id]; } +static inline void Fra_ObjSetFaninVec( Aig_Obj_t * pObj, Vec_Ptr_t * vFanins ) { ((Fra_Man_t *)pObj->pData)->pMemFanins[pObj->Id] = vFanins; } + +static inline int Fra_ObjSatNum( Aig_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pMemSatNums[pObj->Id]; } +static inline void Fra_ObjSetSatNum( Aig_Obj_t * pObj, int Num ) { ((Fra_Man_t *)pObj->pData)->pMemSatNums[pObj->Id] = Num; } + +static inline Aig_Obj_t * Fra_ClassObjRepr( Aig_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pCla->pMemRepr[pObj->Id]; } +static inline void Fra_ClassObjSetRepr( Aig_Obj_t * pObj, Aig_Obj_t * pNode ) { ((Fra_Man_t *)pObj->pData)->pCla->pMemRepr[pObj->Id] = pNode; } + +static inline Aig_Obj_t * Fra_ObjChild0Fra( Aig_Obj_t * pObj, int i ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin0(pObj)? Aig_NotCond(Fra_ObjFraig(Aig_ObjFanin0(pObj),i), Aig_ObjFaninC0(pObj)) : NULL; } +static inline Aig_Obj_t * Fra_ObjChild1Fra( Aig_Obj_t * pObj, int i ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin1(pObj)? Aig_NotCond(Fra_ObjFraig(Aig_ObjFanin1(pObj),i), Aig_ObjFaninC1(pObj)) : NULL; } + +static inline int Fra_ImpLeft( int Imp ) { return Imp & 0xFFFF; } +static inline int Fra_ImpRight( int Imp ) { return Imp >> 16; } +static inline int Fra_ImpCreate( int Left, int Right ) { return (Right << 16) | Left; } + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== fraCec.c ========================================================*/ +extern int Fra_FraigSat( Aig_Man_t * pMan, sint64 nConfLimit, sint64 nInsLimit, int fVerbose ); +extern int Fra_FraigCec( Aig_Man_t ** ppAig, int fVerbose ); +extern int Fra_FraigCecPartitioned( Aig_Man_t * pMan1, Aig_Man_t * pMan2, int fVerbose ); +/*=== fraClass.c ========================================================*/ +extern int Fra_BmcNodeIsConst( Aig_Obj_t * pObj ); +extern int Fra_BmcNodesAreEqual( Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 ); +extern void Fra_BmcStop( Fra_Bmc_t * p ); +extern void Fra_BmcPerform( Fra_Man_t * p, int nPref, int nDepth ); +/*=== fraClass.c ========================================================*/ +extern Fra_Cla_t * Fra_ClassesStart( Aig_Man_t * pAig ); +extern void Fra_ClassesStop( Fra_Cla_t * p ); +extern void Fra_ClassesCopyReprs( Fra_Cla_t * p, Vec_Ptr_t * vFailed ); +extern void Fra_ClassesPrint( Fra_Cla_t * p, int fVeryVerbose ); +extern void Fra_ClassesPrepare( Fra_Cla_t * p, int fLatchCorr ); +extern int Fra_ClassesRefine( Fra_Cla_t * p ); +extern int Fra_ClassesRefine1( Fra_Cla_t * p, int fRefineNewClass, int * pSkipped ); +extern int Fra_ClassesCountLits( Fra_Cla_t * p ); +extern int Fra_ClassesCountPairs( Fra_Cla_t * p ); +extern void Fra_ClassesTest( Fra_Cla_t * p, int Id1, int Id2 ); +extern void Fra_ClassesLatchCorr( Fra_Man_t * p ); +extern void Fra_ClassesPostprocess( Fra_Cla_t * p ); +extern void Fra_ClassesSelectRepr( Fra_Cla_t * p ); +extern Aig_Man_t * Fra_ClassesDeriveAig( Fra_Cla_t * p, int nFramesK ); +/*=== fraCnf.c ========================================================*/ +extern void Fra_CnfNodeAddToSolver( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew ); +/*=== fraCore.c ========================================================*/ +extern void Fra_FraigSweep( Fra_Man_t * pManAig ); +extern int Fra_FraigMiterStatus( Aig_Man_t * p ); +extern Aig_Man_t * Fra_FraigPerform( Aig_Man_t * pManAig, Fra_Par_t * pPars ); +extern Aig_Man_t * Fra_FraigChoice( Aig_Man_t * pManAig, int nConfMax ); +extern Aig_Man_t * Fra_FraigEquivence( Aig_Man_t * pManAig, int nConfMax ); +/*=== fraImp.c ========================================================*/ +extern Vec_Int_t * Fra_ImpDerive( Fra_Man_t * p, int nImpMaxLimit, int nImpUseLimit, int fLatchCorr ); +extern void Fra_ImpAddToSolver( Fra_Man_t * p, Vec_Int_t * vImps, int * pSatVarNums ); +extern int Fra_ImpCheckForNode( Fra_Man_t * p, Vec_Int_t * vImps, Aig_Obj_t * pNode, int Pos ); +extern int Fra_ImpRefineUsingCex( Fra_Man_t * p, Vec_Int_t * vImps ); +extern void Fra_ImpCompactArray( Vec_Int_t * vImps ); +extern double Fra_ImpComputeStateSpaceRatio( Fra_Man_t * p ); +extern int Fra_ImpVerifyUsingSimulation( Fra_Man_t * p ); +extern void Fra_ImpRecordInManager( Fra_Man_t * p, Aig_Man_t * pNew ); +/*=== fraInd.c ========================================================*/ +extern Aig_Man_t * Fra_FraigInduction( Aig_Man_t * p, int nFramesP, int nFramesK, int nMaxImps, int fRewrite, int fUseImps, int fLatchCorr, int fWriteImps, int fVerbose, int * pnIter ); +/*=== fraLcr.c ========================================================*/ +extern Aig_Man_t * Fra_FraigLatchCorrespondence( Aig_Man_t * pAig, int nFramesP, int nConfMax, int fProve, int fVerbose, int * pnIter ); +/*=== fraMan.c ========================================================*/ +extern void Fra_ParamsDefault( Fra_Par_t * pParams ); +extern void Fra_ParamsDefaultSeq( Fra_Par_t * pParams ); +extern Fra_Man_t * Fra_ManStart( Aig_Man_t * pManAig, Fra_Par_t * pParams ); +extern void Fra_ManClean( Fra_Man_t * p, int nNodesMax ); +extern Aig_Man_t * Fra_ManPrepareComb( Fra_Man_t * p ); +extern void Fra_ManFinalizeComb( Fra_Man_t * p ); +extern void Fra_ManStop( Fra_Man_t * p ); +extern void Fra_ManPrint( Fra_Man_t * p ); +/*=== fraSat.c ========================================================*/ +extern int Fra_NodesAreEquiv( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew ); +extern int Fra_NodesAreImp( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew, int fComplL, int fComplR ); +extern int Fra_NodeIsConst( Fra_Man_t * p, Aig_Obj_t * pNew ); +/*=== fraSec.c ========================================================*/ +extern int Fra_FraigSec( Aig_Man_t * p, int nFrames, int fRetimeFirst, int fVerbose, int fVeryVerbose ); +/*=== fraSim.c ========================================================*/ +extern int Fra_SmlNodeHash( Aig_Obj_t * pObj, int nTableSize ); +extern int Fra_SmlNodeIsConst( Aig_Obj_t * pObj ); +extern int Fra_SmlNodesAreEqual( Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 ); +extern int Fra_SmlNodeNotEquWeight( Fra_Sml_t * p, int Left, int Right ); +extern int Fra_SmlCheckOutput( Fra_Man_t * p ); +extern void Fra_SmlSavePattern( Fra_Man_t * p ); +extern void Fra_SmlSimulate( Fra_Man_t * p, int fInit ); +extern void Fra_SmlResimulate( Fra_Man_t * p ); +extern Fra_Sml_t * Fra_SmlStart( Aig_Man_t * pAig, int nPref, int nFrames, int nWordsFrame ); +extern void Fra_SmlStop( Fra_Sml_t * p ); +extern Fra_Sml_t * Fra_SmlSimulateSeq( Aig_Man_t * pAig, int nPref, int nFrames, int nWords ); +extern Fra_Sml_t * Fra_SmlSimulateComb( Aig_Man_t * pAig, int nWords ); + + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/fra/fraBmc.c b/src/aig/fra/fraBmc.c new file mode 100644 index 00000000..eebafaf6 --- /dev/null +++ b/src/aig/fra/fraBmc.c @@ -0,0 +1,362 @@ +/**CFile**************************************************************** + + FileName [fraBmc.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Bounded model checking.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraBmc.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// simulation manager +struct Fra_Bmc_t_ +{ + // parameters + int nPref; // the size of the prefix + int nDepth; // the depth of the frames + int nFramesAll; // the total number of timeframes + // implications to be filtered + Vec_Int_t * vImps; + // AIG managers + Aig_Man_t * pAig; // the original AIG manager + Aig_Man_t * pAigFrames; // initialized timeframes + Aig_Man_t * pAigFraig; // the fraiged initialized timeframes + // mapping of nodes + Aig_Obj_t ** pObjToFrames; // mapping of the original node into frames + Aig_Obj_t ** pObjToFraig; // mapping of the frames node into fraig +}; + +static inline Aig_Obj_t * Bmc_ObjFrames( Aig_Obj_t * pObj, int i ) { return ((Fra_Man_t *)pObj->pData)->pBmc->pObjToFrames[((Fra_Man_t *)pObj->pData)->pBmc->nFramesAll*pObj->Id + i]; } +static inline void Bmc_ObjSetFrames( Aig_Obj_t * pObj, int i, Aig_Obj_t * pNode ) { ((Fra_Man_t *)pObj->pData)->pBmc->pObjToFrames[((Fra_Man_t *)pObj->pData)->pBmc->nFramesAll*pObj->Id + i] = pNode; } + +static inline Aig_Obj_t * Bmc_ObjFraig( Aig_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pBmc->pObjToFraig[pObj->Id]; } +static inline void Bmc_ObjSetFraig( Aig_Obj_t * pObj, Aig_Obj_t * pNode ) { ((Fra_Man_t *)pObj->pData)->pBmc->pObjToFraig[pObj->Id] = pNode; } + +static inline Aig_Obj_t * Bmc_ObjChild0Frames( Aig_Obj_t * pObj, int i ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin0(pObj)? Aig_NotCond(Bmc_ObjFrames(Aig_ObjFanin0(pObj),i), Aig_ObjFaninC0(pObj)) : NULL; } +static inline Aig_Obj_t * Bmc_ObjChild1Frames( Aig_Obj_t * pObj, int i ) { assert( !Aig_IsComplement(pObj) ); return Aig_ObjFanin1(pObj)? Aig_NotCond(Bmc_ObjFrames(Aig_ObjFanin1(pObj),i), Aig_ObjFaninC1(pObj)) : NULL; } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns 1 if the nodes are equivalent.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_BmcNodesAreEqual( Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 ) +{ + Fra_Man_t * p = pObj0->pData; + Aig_Obj_t * pObjFrames0, * pObjFrames1; + Aig_Obj_t * pObjFraig0, * pObjFraig1; + int i; + for ( i = p->pBmc->nPref; i < p->pBmc->nFramesAll; i++ ) + { + pObjFrames0 = Aig_Regular( Bmc_ObjFrames(pObj0, i) ); + pObjFrames1 = Aig_Regular( Bmc_ObjFrames(pObj1, i) ); + if ( pObjFrames0 == pObjFrames1 ) + continue; + pObjFraig0 = Aig_Regular( Bmc_ObjFraig(pObjFrames0) ); + pObjFraig1 = Aig_Regular( Bmc_ObjFraig(pObjFrames1) ); + if ( pObjFraig0 != pObjFraig1 ) + return 0; + } + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the node is costant.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_BmcNodeIsConst( Aig_Obj_t * pObj ) +{ + Fra_Man_t * p = pObj->pData; + return Fra_BmcNodesAreEqual( pObj, Aig_ManConst1(p->pManAig) ); +} + +/**Function************************************************************* + + Synopsis [Refines implications using BMC.] + + Description [The input is the combinational FRAIG manager, + which is used to FRAIG the timeframes. ] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_BmcFilterImplications( Fra_Man_t * p, Fra_Bmc_t * pBmc ) +{ + Aig_Obj_t * pLeft, * pRight; + Aig_Obj_t * pLeftT, * pRightT; + Aig_Obj_t * pLeftF, * pRightF; + int i, f, Imp, Left, Right; + int fComplL, fComplR; + assert( p->nFramesAll == 1 ); + assert( p->pManAig == pBmc->pAigFrames ); + Vec_IntForEachEntry( pBmc->vImps, Imp, i ) + { + if ( Imp == 0 ) + continue; + Left = Fra_ImpLeft(Imp); + Right = Fra_ImpRight(Imp); + // get the corresponding nodes + pLeft = Aig_ManObj( pBmc->pAig, Left ); + pRight = Aig_ManObj( pBmc->pAig, Right ); + // iterate through the timeframes + for ( f = pBmc->nPref; f < pBmc->nFramesAll; f++ ) + { + // get timeframe nodes + pLeftT = Bmc_ObjFrames( pLeft, f ); + pRightT = Bmc_ObjFrames( pRight, f ); + // get the corresponding FRAIG nodes + pLeftF = Fra_ObjFraig( Aig_Regular(pLeftT), 0 ); + pRightF = Fra_ObjFraig( Aig_Regular(pRightT), 0 ); + // get the complemented attributes + fComplL = pLeft->fPhase ^ Aig_IsComplement(pLeftF) ^ Aig_IsComplement(pLeftT); + fComplR = pRight->fPhase ^ Aig_IsComplement(pRightF) ^ Aig_IsComplement(pRightT); + // check equality + if ( Aig_Regular(pLeftF) == Aig_Regular(pRightF) ) + { + if ( fComplL == fComplR ) // x => x - always true + continue; + assert( fComplL != fComplR ); + // consider 4 possibilities: + // NOT(1) => 1 or 0 => 1 - always true + // 1 => NOT(1) or 1 => 0 - never true + // NOT(x) => x or x - not always true + // x => NOT(x) or NOT(x) - not always true + if ( Aig_ObjIsConst1(Aig_Regular(pLeftF)) && fComplL ) // proved implication + continue; + // disproved implication + Vec_IntWriteEntry( pBmc->vImps, i, 0 ); + break; + } + // check the implication + if ( Fra_NodesAreImp( p, Aig_Regular(pLeftF), Aig_Regular(pRightF), fComplL, fComplR ) != 1 ) + { + Vec_IntWriteEntry( pBmc->vImps, i, 0 ); + break; + } + } + } + Fra_ImpCompactArray( pBmc->vImps ); +} + + +/**Function************************************************************* + + Synopsis [Starts the BMC manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Bmc_t * Fra_BmcStart( Aig_Man_t * pAig, int nPref, int nDepth ) +{ + Fra_Bmc_t * p; + p = ALLOC( Fra_Bmc_t, 1 ); + memset( p, 0, sizeof(Fra_Bmc_t) ); + p->pAig = pAig; + p->nPref = nPref; + p->nDepth = nDepth; + p->nFramesAll = nPref + nDepth; + p->pObjToFrames = ALLOC( Aig_Obj_t *, p->nFramesAll * Aig_ManObjNumMax(pAig) ); + memset( p->pObjToFrames, 0, sizeof(Aig_Obj_t *) * p->nFramesAll * Aig_ManObjNumMax(pAig) ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the BMC manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_BmcStop( Fra_Bmc_t * p ) +{ + Aig_ManStop( p->pAigFrames ); + Aig_ManStop( p->pAigFraig ); + free( p->pObjToFrames ); + free( p->pObjToFraig ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Constructs initialized timeframes of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_BmcFrames( Fra_Bmc_t * p ) +{ + Aig_Man_t * pAigFrames; + Aig_Obj_t * pObj, * pObjNew; + Aig_Obj_t ** pLatches; + int i, k, f; + + // start the fraig package + pAigFrames = Aig_ManStart( Aig_ManObjNumMax(p->pAig) * p->nFramesAll ); + pAigFrames->pName = Aig_UtilStrsav( p->pAig->pName ); + // create PI nodes for the frames + for ( f = 0; f < p->nFramesAll; f++ ) + Bmc_ObjSetFrames( Aig_ManConst1(p->pAig), f, Aig_ManConst1(pAigFrames) ); + for ( f = 0; f < p->nFramesAll; f++ ) + Aig_ManForEachPiSeq( p->pAig, pObj, i ) + Bmc_ObjSetFrames( pObj, f, Aig_ObjCreatePi(pAigFrames) ); + // set initial state for the latches + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Bmc_ObjSetFrames( pObj, 0, Aig_ManConst0(pAigFrames) ); + + // add timeframes + pLatches = ALLOC( Aig_Obj_t *, Aig_ManRegNum(p->pAig) ); + for ( f = 0; f < p->nFramesAll; f++ ) + { + // add internal nodes of this frame + Aig_ManForEachNode( p->pAig, pObj, i ) + { + pObjNew = Aig_And( pAigFrames, Bmc_ObjChild0Frames(pObj,f), Bmc_ObjChild1Frames(pObj,f) ); + Bmc_ObjSetFrames( pObj, f, pObjNew ); + } + if ( f == p->nFramesAll - 1 ) + break; + // save the latch input values + k = 0; + Aig_ManForEachLiSeq( p->pAig, pObj, i ) + pLatches[k++] = Bmc_ObjChild0Frames(pObj,f); + assert( k == Aig_ManRegNum(p->pAig) ); + // insert them to the latch output values + k = 0; + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Bmc_ObjSetFrames( pObj, f+1, pLatches[k++] ); + assert( k == Aig_ManRegNum(p->pAig) ); + } + free( pLatches ); + // add POs to all the dangling nodes + Aig_ManForEachObj( pAigFrames, pObjNew, i ) + if ( Aig_ObjIsNode(pObjNew) && pObjNew->nRefs == 0 ) + Aig_ObjCreatePo( pAigFrames, pObjNew ); + + // return the new manager + return pAigFrames; +} + +/**Function************************************************************* + + Synopsis [Performs BMC for the given AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_BmcPerform( Fra_Man_t * p, int nPref, int nDepth ) +{ + Aig_Obj_t * pObj; + int i, nImpsOld = 0, clk = clock(); + assert( p->pBmc == NULL ); + // derive and fraig the frames + p->pBmc = Fra_BmcStart( p->pManAig, nPref, nDepth ); + p->pBmc->pAigFrames = Fra_BmcFrames( p->pBmc ); + // if implications are present, configure the AIG manager to check them + if ( p->pCla->vImps ) + { + p->pBmc->pAigFrames->pImpFunc = (void (*) (void*, void*))Fra_BmcFilterImplications; + p->pBmc->pAigFrames->pImpData = p->pBmc; + p->pBmc->vImps = p->pCla->vImps; + nImpsOld = Vec_IntSize(p->pCla->vImps); + } + p->pBmc->pAigFraig = Fra_FraigEquivence( p->pBmc->pAigFrames, 1000000 ); + p->pBmc->pObjToFraig = p->pBmc->pAigFrames->pObjCopies; + p->pBmc->pAigFrames->pObjCopies = NULL; + // annotate frames nodes with pointers to the manager + Aig_ManForEachObj( p->pBmc->pAigFrames, pObj, i ) + pObj->pData = p; + // report the results + if ( p->pPars->fVerbose ) + { + printf( "Original AIG = %d. Init %d frames = %d. Fraig = %d. ", + Aig_ManNodeNum(p->pBmc->pAig), p->pBmc->nFramesAll, + Aig_ManNodeNum(p->pBmc->pAigFrames), Aig_ManNodeNum(p->pBmc->pAigFraig) ); + PRT( "Time", clock() - clk ); + printf( "Before BMC: " ); +// Fra_ClassesPrint( p->pCla, 0 ); + printf( "Const = %5d. Class = %5d. Lit = %5d. ", + Vec_PtrSize(p->pCla->vClasses1), Vec_PtrSize(p->pCla->vClasses), Fra_ClassesCountLits(p->pCla) ); + if ( p->pCla->vImps ) + printf( "Imp = %5d. ", nImpsOld ); + printf( "\n" ); + } + // refine the classes + p->pCla->pFuncNodeIsConst = Fra_BmcNodeIsConst; + p->pCla->pFuncNodesAreEqual = Fra_BmcNodesAreEqual; + Fra_ClassesRefine( p->pCla ); + Fra_ClassesRefine1( p->pCla, 1, NULL ); + p->pCla->pFuncNodeIsConst = Fra_SmlNodeIsConst; + p->pCla->pFuncNodesAreEqual = Fra_SmlNodesAreEqual; + // report the results + if ( p->pPars->fVerbose ) + { + printf( "After BMC: " ); +// Fra_ClassesPrint( p->pCla, 0 ); + printf( "Const = %5d. Class = %5d. Lit = %5d. ", + Vec_PtrSize(p->pCla->vClasses1), Vec_PtrSize(p->pCla->vClasses), Fra_ClassesCountLits(p->pCla) ); + if ( p->pCla->vImps ) + printf( "Imp = %5d. ", Vec_IntSize(p->pCla->vImps) ); + printf( "\n" ); + } + // free the BMC manager + Fra_BmcStop( p->pBmc ); + p->pBmc = NULL; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraCec.c b/src/aig/fra/fraCec.c new file mode 100644 index 00000000..3e69e02f --- /dev/null +++ b/src/aig/fra/fraCec.c @@ -0,0 +1,303 @@ +/**CFile**************************************************************** + + FileName [fraCec.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [CEC engined based on fraiging.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraCec.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" +#include "cnf.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_FraigSat( Aig_Man_t * pMan, sint64 nConfLimit, sint64 nInsLimit, int fVerbose ) +{ + sat_solver * pSat; + Cnf_Dat_t * pCnf; + int status, RetValue, clk = clock(); + Vec_Int_t * vCiIds; + + assert( Aig_ManPoNum(pMan) == 1 ); + pMan->pData = NULL; + + // derive CNF + pCnf = Cnf_Derive( pMan, 0 ); +// pCnf = Cnf_DeriveSimple( pMan, 0 ); + // convert into the SAT solver + pSat = Cnf_DataWriteIntoSolver( pCnf ); + vCiIds = Cnf_DataCollectPiSatNums( pCnf, pMan ); + Cnf_DataFree( pCnf ); + // solve SAT + if ( pSat == NULL ) + { + Vec_IntFree( vCiIds ); +// printf( "Trivially unsat\n" ); + return 1; + } + + +// printf( "Created SAT problem with %d variable and %d clauses. ", sat_solver_nvars(pSat), sat_solver_nclauses(pSat) ); +// PRT( "Time", clock() - clk ); + + // simplify the problem + clk = clock(); + status = sat_solver_simplify(pSat); +// printf( "Simplified the problem to %d variables and %d clauses. ", sat_solver_nvars(pSat), sat_solver_nclauses(pSat) ); +// PRT( "Time", clock() - clk ); + if ( status == 0 ) + { + Vec_IntFree( vCiIds ); + sat_solver_delete( pSat ); +// printf( "The problem is UNSATISFIABLE after simplification.\n" ); + return 1; + } + + // solve the miter + clk = clock(); + if ( fVerbose ) + pSat->verbosity = 1; + status = sat_solver_solve( pSat, NULL, NULL, (sint64)nConfLimit, (sint64)nInsLimit, (sint64)0, (sint64)0 ); + if ( status == l_Undef ) + { +// printf( "The problem timed out.\n" ); + RetValue = -1; + } + else if ( status == l_True ) + { +// printf( "The problem is SATISFIABLE.\n" ); + RetValue = 0; + } + else if ( status == l_False ) + { +// printf( "The problem is UNSATISFIABLE.\n" ); + RetValue = 1; + } + else + assert( 0 ); +// PRT( "SAT sat_solver time", clock() - clk ); +// printf( "The number of conflicts = %d.\n", (int)pSat->sat_solver_stats.conflicts ); + + // if the problem is SAT, get the counterexample + if ( status == l_True ) + { + pMan->pData = Sat_SolverGetModel( pSat, vCiIds->pArray, vCiIds->nSize ); + } + // free the sat_solver + if ( fVerbose ) + Sat_SolverPrintStats( stdout, pSat ); +//sat_solver_store_write( pSat, "trace.cnf" ); +//sat_solver_store_free( pSat ); + sat_solver_delete( pSat ); + Vec_IntFree( vCiIds ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_FraigCec( Aig_Man_t ** ppAig, int fVerbose ) +{ + int nBTLimitStart = 300; // starting SAT run + int nBTLimitFirst = 2; // first fraiging iteration + int nBTLimitLast = 1000000; // the last-gasp SAT run + + Fra_Par_t Params, * pParams = &Params; + Aig_Man_t * pAig = *ppAig, * pTemp; + int i, RetValue, clk; + + // report the original miter + if ( fVerbose ) + { + printf( "Original miter: Nodes = %6d.\n", Aig_ManNodeNum(pAig) ); + } + RetValue = Fra_FraigMiterStatus( pAig ); +// assert( RetValue == -1 ); + if ( RetValue >= 0 ) + return RetValue; + + // if SAT only, solve without iteration +clk = clock(); + RetValue = Fra_FraigSat( pAig, (sint64)2*nBTLimitStart, (sint64)0, 0 ); + if ( fVerbose ) + { + printf( "Initial SAT: Nodes = %6d. ", Aig_ManNodeNum(pAig) ); +PRT( "Time", clock() - clk ); + } + if ( RetValue >= 0 ) + return RetValue; + + // duplicate the AIG +clk = clock(); +// pAig = Aig_ManDup( pTemp = pAig ); + pAig = Dar_ManRwsat( pTemp = pAig, 0, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Rewriting: Nodes = %6d. ", Aig_ManNodeNum(pAig) ); +PRT( "Time", clock() - clk ); + } + + // perform the loop + Fra_ParamsDefault( pParams ); + pParams->nBTLimitNode = nBTLimitFirst; + pParams->nBTLimitMiter = nBTLimitStart; + pParams->fDontShowBar = 1; + pParams->fProve = 1; + for ( i = 0; i < 6; i++ ) + { +//printf( "Running fraiging with %d BTnode and %d BTmiter.\n", pParams->nBTLimitNode, pParams->nBTLimitMiter ); + // run fraiging +clk = clock(); + pAig = Fra_FraigPerform( pTemp = pAig, pParams ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Fraiging (i=%d): Nodes = %6d. ", i+1, Aig_ManNodeNum(pAig) ); +PRT( "Time", clock() - clk ); + } + + // check the miter status + RetValue = Fra_FraigMiterStatus( pAig ); + if ( RetValue >= 0 ) + break; + + // perform rewriting +clk = clock(); + pAig = Dar_ManRewriteDefault( pTemp = pAig ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Rewriting: Nodes = %6d. ", Aig_ManNodeNum(pAig) ); +PRT( "Time", clock() - clk ); + } + + // check the miter status + RetValue = Fra_FraigMiterStatus( pAig ); + if ( RetValue >= 0 ) + break; + // try simulation + + // set the parameters for the next run + pParams->nBTLimitNode = 8 * pParams->nBTLimitNode; + pParams->nBTLimitMiter = 2 * pParams->nBTLimitMiter; + } + + // if still unsolved try last gasp + if ( RetValue == -1 ) + { +clk = clock(); + RetValue = Fra_FraigSat( pAig, (sint64)nBTLimitLast, (sint64)0, 0 ); + if ( fVerbose ) + { + printf( "Final SAT: Nodes = %6d. ", Aig_ManNodeNum(pAig) ); +PRT( "Time", clock() - clk ); + } + } + + *ppAig = pAig; + return RetValue; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_FraigCecPartitioned( Aig_Man_t * pMan1, Aig_Man_t * pMan2, int fVerbose ) +{ + Aig_Man_t * pAig; + Vec_Ptr_t * vParts; + int i, RetValue = 1, nOutputs; + // create partitions + vParts = Aig_ManMiterPartitioned( pMan1, pMan2, 100 ); + // solve the partitions + nOutputs = -1; + Vec_PtrForEachEntry( vParts, pAig, i ) + { + nOutputs++; + if ( fVerbose ) + printf( "Verifying part %4d (out of %4d) PI = %5d. PO = %5d. And = %6d. Lev = %4d.\r", + i+1, Vec_PtrSize(vParts), Aig_ManPiNum(pAig), Aig_ManPoNum(pAig), + Aig_ManNodeNum(pAig), Aig_ManLevelNum(pAig) ); + RetValue = Fra_FraigMiterStatus( pAig ); + if ( RetValue == 1 ) + continue; + if ( RetValue == 0 ) + break; + RetValue = Fra_FraigCec( &pAig, 0 ); + Vec_PtrWriteEntry( vParts, i, pAig ); + if ( RetValue == 1 ) + continue; + if ( RetValue == 0 ) + break; + break; + } + // clear the result + if ( fVerbose ) + { + printf( " \r" ); + fflush( stdout ); + } + // report the timeout + if ( RetValue == -1 ) + { + printf( "Timed out after verifying %d partitions (out of %d).\n", nOutputs, Vec_PtrSize(vParts) ); + fflush( stdout ); + } + // free intermediate results + Vec_PtrForEachEntry( vParts, pAig, i ) + Aig_ManStop( pAig ); + Vec_PtrFree( vParts ); + return RetValue; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraClass.c b/src/aig/fra/fraClass.c new file mode 100644 index 00000000..962e7f7b --- /dev/null +++ b/src/aig/fra/fraClass.c @@ -0,0 +1,855 @@ +/**CFile**************************************************************** + + FileName [fraClass.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraClass.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +/* + The candidate equivalence classes are stored as a vector of pointers + to the array of pointers to the nodes in each class. + The first node of the class is its representative node. + The representative has the smallest topological order among the class nodes. + The nodes inside each class are ordered according to their topological order. + The classes are ordered according to the topological order of their representatives. + The array of pointers to the class nodes is terminated with a NULL pointer. + To enable dynamic addition of new classes (during class refinement), + each array has at least as many NULLs in the end, as there are nodes in the class. +*/ + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static inline Aig_Obj_t * Fra_ObjNext( Aig_Obj_t ** ppNexts, Aig_Obj_t * pObj ) { return ppNexts[pObj->Id]; } +static inline void Fra_ObjSetNext( Aig_Obj_t ** ppNexts, Aig_Obj_t * pObj, Aig_Obj_t * pNext ) { ppNexts[pObj->Id] = pNext; } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts representation of equivalence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Cla_t * Fra_ClassesStart( Aig_Man_t * pAig ) +{ + Fra_Cla_t * p; + p = ALLOC( Fra_Cla_t, 1 ); + memset( p, 0, sizeof(Fra_Cla_t) ); + p->pAig = pAig; + p->pMemRepr = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(pAig) ); + memset( p->pMemRepr, 0, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(pAig) ); + p->vClasses = Vec_PtrAlloc( 100 ); + p->vClasses1 = Vec_PtrAlloc( 100 ); + p->vClassesTemp = Vec_PtrAlloc( 100 ); + p->vClassOld = Vec_PtrAlloc( 100 ); + p->vClassNew = Vec_PtrAlloc( 100 ); + p->pFuncNodeHash = Fra_SmlNodeHash; + p->pFuncNodeIsConst = Fra_SmlNodeIsConst; + p->pFuncNodesAreEqual = Fra_SmlNodesAreEqual; + return p; +} + +/**Function************************************************************* + + Synopsis [Stop representation of equivalence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesStop( Fra_Cla_t * p ) +{ + FREE( p->pMemClasses ); + FREE( p->pMemRepr ); + if ( p->vClassesTemp ) Vec_PtrFree( p->vClassesTemp ); + if ( p->vClassNew ) Vec_PtrFree( p->vClassNew ); + if ( p->vClassOld ) Vec_PtrFree( p->vClassOld ); + if ( p->vClasses1 ) Vec_PtrFree( p->vClasses1 ); + if ( p->vClasses ) Vec_PtrFree( p->vClasses ); + if ( p->vImps ) Vec_IntFree( p->vImps ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Starts representation of equivalence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesCopyReprs( Fra_Cla_t * p, Vec_Ptr_t * vFailed ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManReprStart( p->pAig, Aig_ManObjNumMax(p->pAig) ); + memmove( p->pAig->pReprs, p->pMemRepr, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(p->pAig) ); + if ( Vec_PtrSize(p->vClasses1) == 0 && Vec_PtrSize(p->vClasses) == 0 ) + { + Aig_ManForEachObj( p->pAig, pObj, i ) + { + if ( p->pAig->pReprs[i] != NULL ) + printf( "Classes are not cleared!\n" ); + assert( p->pAig->pReprs[i] == NULL ); + } + } + if ( vFailed ) + Vec_PtrForEachEntry( vFailed, pObj, i ) + p->pAig->pReprs[pObj->Id] = NULL; +} + +/**Function************************************************************* + + Synopsis [Prints simulation classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ClassCount( Aig_Obj_t ** pClass ) +{ + Aig_Obj_t * pTemp; + int i; + for ( i = 0; (pTemp = pClass[i]); i++ ); + return i; +} + +/**Function************************************************************* + + Synopsis [Count the number of literals.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ClassesCountLits( Fra_Cla_t * p ) +{ + Aig_Obj_t ** pClass; + int i, nNodes, nLits = 0; + nLits = Vec_PtrSize( p->vClasses1 ); + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + nNodes = Fra_ClassCount( pClass ); + assert( nNodes > 1 ); + nLits += nNodes - 1; + } + return nLits; +} + +/**Function************************************************************* + + Synopsis [Count the number of pairs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ClassesCountPairs( Fra_Cla_t * p ) +{ + Aig_Obj_t ** pClass; + int i, nNodes, nPairs = 0; + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + nNodes = Fra_ClassCount( pClass ); + assert( nNodes > 1 ); + nPairs += nNodes * (nNodes - 1) / 2; + } + return nPairs; +} + +/**Function************************************************************* + + Synopsis [Prints simulation classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_PrintClass( Aig_Obj_t ** pClass ) +{ + Aig_Obj_t * pTemp; + int i; + for ( i = 1; (pTemp = pClass[i]); i++ ) + assert( Fra_ClassObjRepr(pTemp) == pClass[0] ); + printf( "{ " ); + for ( i = 0; (pTemp = pClass[i]); i++ ) + printf( "%d(%d) ", pTemp->Id, pTemp->Level ); + printf( "}\n" ); +} + +/**Function************************************************************* + + Synopsis [Prints simulation classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesPrint( Fra_Cla_t * p, int fVeryVerbose ) +{ + Aig_Obj_t ** pClass; + Aig_Obj_t * pObj; + int i; + + printf( "Const = %5d. Class = %5d. Lit = %5d. ", + Vec_PtrSize(p->vClasses1), Vec_PtrSize(p->vClasses), Fra_ClassesCountLits(p) ); + if ( p->vImps && Vec_IntSize(p->vImps) > 0 ) + printf( "Imp = %5d. ", Vec_IntSize(p->vImps) ); + printf( "\n" ); + + if ( fVeryVerbose ) + { + Vec_PtrForEachEntry( p->vClasses1, pObj, i ) + assert( Fra_ClassObjRepr(pObj) == Aig_ManConst1(p->pAig) ); + printf( "Constants { " ); + Vec_PtrForEachEntry( p->vClasses1, pObj, i ) + printf( "%d ", pObj->Id ); + printf( "}\n" ); + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + printf( "%3d (%3d) : ", i, Fra_ClassCount(pClass) ); + Fra_PrintClass( pClass ); + } + printf( "\n" ); + } +} + +/**Function************************************************************* + + Synopsis [Creates initial simulation classes.] + + Description [Assumes that simulation info is assigned.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesPrepare( Fra_Cla_t * p, int fLatchCorr ) +{ + Aig_Obj_t ** ppTable, ** ppNexts; + Aig_Obj_t * pObj, * pTemp; + int i, k, nTableSize, nEntries, nNodes, iEntry; + + // allocate the hash table hashing simulation info into nodes + nTableSize = Aig_PrimeCudd( Aig_ManObjNumMax(p->pAig) ); + ppTable = ALLOC( Aig_Obj_t *, nTableSize ); + ppNexts = ALLOC( Aig_Obj_t *, nTableSize ); + memset( ppTable, 0, sizeof(Aig_Obj_t *) * nTableSize ); + + // add all the nodes to the hash table + Vec_PtrClear( p->vClasses1 ); + Aig_ManForEachObj( p->pAig, pObj, i ) + { + if ( fLatchCorr ) + { + if ( !Aig_ObjIsPi(pObj) ) + continue; + } + else + { + if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) ) + continue; + // skip the node with more that the given number of levels +// if ( pObj->Level > 3 ) +// continue; + } + // hash the node by its simulation info + iEntry = p->pFuncNodeHash( pObj, nTableSize ); + // check if the node belongs to the class of constant 1 + if ( p->pFuncNodeIsConst( pObj ) ) + { + Vec_PtrPush( p->vClasses1, pObj ); + Fra_ClassObjSetRepr( pObj, Aig_ManConst1(p->pAig) ); + continue; + } + // add the node to the class + if ( ppTable[iEntry] == NULL ) + { + ppTable[iEntry] = pObj; + Fra_ObjSetNext( ppNexts, pObj, pObj ); + } + else + { + Fra_ObjSetNext( ppNexts, pObj, Fra_ObjNext(ppNexts,ppTable[iEntry]) ); + Fra_ObjSetNext( ppNexts, ppTable[iEntry], pObj ); + } + } + + // count the total number of nodes in the non-trivial classes + // mark the representative nodes of each equivalence class + nEntries = 0; + for ( i = 0; i < nTableSize; i++ ) + if ( ppTable[i] && ppTable[i] != Fra_ObjNext(ppNexts, ppTable[i]) ) + { + for ( pTemp = Fra_ObjNext(ppNexts, ppTable[i]), k = 1; + pTemp != ppTable[i]; + pTemp = Fra_ObjNext(ppNexts, pTemp), k++ ); + assert( k > 1 ); + nEntries += k; + // mark the node + assert( ppTable[i]->fMarkA == 0 ); + ppTable[i]->fMarkA = 1; + } + + // allocate room for classes + p->pMemClasses = ALLOC( Aig_Obj_t *, 2*(nEntries + Vec_PtrSize(p->vClasses1)) ); + p->pMemClassesFree = p->pMemClasses + 2*nEntries; + + // copy the entries into storage in the topological order + Vec_PtrClear( p->vClasses ); + nEntries = 0; + Aig_ManForEachObj( p->pAig, pObj, i ) + { + if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) ) + continue; + // skip the nodes that are not representatives of non-trivial classes + if ( pObj->fMarkA == 0 ) + continue; + pObj->fMarkA = 0; + // add the class of nodes + Vec_PtrPush( p->vClasses, p->pMemClasses + 2*nEntries ); + // count the number of entries in this class + for ( pTemp = Fra_ObjNext(ppNexts, pObj), k = 1; + pTemp != pObj; + pTemp = Fra_ObjNext(ppNexts, pTemp), k++ ); + nNodes = k; + assert( nNodes > 1 ); + // add the nodes to the class in the topological order + p->pMemClasses[2*nEntries] = pObj; + for ( pTemp = Fra_ObjNext(ppNexts, pObj), k = 1; + pTemp != pObj; + pTemp = Fra_ObjNext(ppNexts, pTemp), k++ ) + { + p->pMemClasses[2*nEntries+nNodes-k] = pTemp; + Fra_ClassObjSetRepr( pTemp, pObj ); + } + // add as many empty entries + p->pMemClasses[2*nEntries + nNodes] = NULL; + // increment the number of entries + nEntries += k; + } + free( ppTable ); + free( ppNexts ); + // now it is time to refine the classes + Fra_ClassesRefine( p ); +} + +/**Function************************************************************* + + Synopsis [Refines one class using simulation info.] + + Description [Returns the new class if refinement happened.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t ** Fra_RefineClassOne( Fra_Cla_t * p, Aig_Obj_t ** ppClass ) +{ + Aig_Obj_t * pObj, ** ppThis; + int i; + assert( ppClass[0] != NULL && ppClass[1] != NULL ); + + // check if the class is going to be refined + for ( ppThis = ppClass + 1; (pObj = *ppThis); ppThis++ ) + if ( !p->pFuncNodesAreEqual(ppClass[0], pObj) ) + break; + if ( pObj == NULL ) + return NULL; + // split the class + Vec_PtrClear( p->vClassOld ); + Vec_PtrClear( p->vClassNew ); + Vec_PtrPush( p->vClassOld, ppClass[0] ); + for ( ppThis = ppClass + 1; (pObj = *ppThis); ppThis++ ) + if ( p->pFuncNodesAreEqual(ppClass[0], pObj) ) + Vec_PtrPush( p->vClassOld, pObj ); + else + Vec_PtrPush( p->vClassNew, pObj ); +/* + printf( "Refining class (" ); + Vec_PtrForEachEntry( p->vClassOld, pObj, i ) + printf( "%d,", pObj->Id ); + printf( ") + (" ); + Vec_PtrForEachEntry( p->vClassNew, pObj, i ) + printf( "%d,", pObj->Id ); + printf( ")\n" ); +*/ + // put the nodes back into the class memory + Vec_PtrForEachEntry( p->vClassOld, pObj, i ) + { + ppClass[i] = pObj; + ppClass[Vec_PtrSize(p->vClassOld)+i] = NULL; + Fra_ClassObjSetRepr( pObj, i? ppClass[0] : NULL ); + } + ppClass += 2*Vec_PtrSize(p->vClassOld); + // put the new nodes into the class memory + Vec_PtrForEachEntry( p->vClassNew, pObj, i ) + { + ppClass[i] = pObj; + ppClass[Vec_PtrSize(p->vClassNew)+i] = NULL; + Fra_ClassObjSetRepr( pObj, i? ppClass[0] : NULL ); + } + return ppClass; +} + +/**Function************************************************************* + + Synopsis [Iteratively refines the classes after simulation.] + + Description [Returns the number of refinements performed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_RefineClassLastIter( Fra_Cla_t * p, Vec_Ptr_t * vClasses ) +{ + Aig_Obj_t ** pClass, ** pClass2; + int nRefis; + pClass = Vec_PtrEntryLast( vClasses ); + for ( nRefis = 0; (pClass2 = Fra_RefineClassOne( p, pClass )); nRefis++ ) + { + // if the original class is trivial, remove it + if ( pClass[1] == NULL ) + Vec_PtrPop( vClasses ); + // if the new class is trivial, stop + if ( pClass2[1] == NULL ) + { + nRefis++; + break; + } + // othewise, add the class and continue + assert( pClass2[0] != NULL ); + Vec_PtrPush( vClasses, pClass2 ); + pClass = pClass2; + } + return nRefis; +} + +/**Function************************************************************* + + Synopsis [Refines the classes after simulation.] + + Description [Assumes that simulation info is assigned. Returns the + number of classes refined.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ClassesRefine( Fra_Cla_t * p ) +{ + Vec_Ptr_t * vTemp; + Aig_Obj_t ** pClass; + int i, nRefis; + // refine the classes + nRefis = 0; + Vec_PtrClear( p->vClassesTemp ); + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + // add the class to the new array + assert( pClass[0] != NULL ); + Vec_PtrPush( p->vClassesTemp, pClass ); + // refine the class iteratively + nRefis += Fra_RefineClassLastIter( p, p->vClassesTemp ); + } + // exchange the class representation + vTemp = p->vClassesTemp; + p->vClassesTemp = p->vClasses; + p->vClasses = vTemp; + return nRefis; +} + +/**Function************************************************************* + + Synopsis [Refines constant 1 equivalence class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ClassesRefine1( Fra_Cla_t * p, int fRefineNewClass, int * pSkipped ) +{ + Aig_Obj_t * pObj, ** ppClass; + int i, k, nRefis = 1; + // check if there is anything to refine + if ( Vec_PtrSize(p->vClasses1) == 0 ) + return 0; + // make sure constant 1 class contains only non-constant nodes + assert( Vec_PtrEntry(p->vClasses1,0) != Aig_ManConst1(p->pAig) ); + // collect all the nodes to be refined + k = 0; + Vec_PtrClear( p->vClassNew ); + Vec_PtrForEachEntry( p->vClasses1, pObj, i ) + { + if ( p->pFuncNodeIsConst( pObj ) ) + Vec_PtrWriteEntry( p->vClasses1, k++, pObj ); + else + Vec_PtrPush( p->vClassNew, pObj ); + } + Vec_PtrShrink( p->vClasses1, k ); + if ( Vec_PtrSize(p->vClassNew) == 0 ) + return 0; +/* + printf( "Refined const-1 class: {" ); + Vec_PtrForEachEntry( p->vClassNew, pObj, i ) + printf( " %d", pObj->Id ); + printf( " }\n" ); +*/ + if ( Vec_PtrSize(p->vClassNew) == 1 ) + { + Fra_ClassObjSetRepr( Vec_PtrEntry(p->vClassNew,0), NULL ); + return 1; + } + // create a new class composed of these nodes + ppClass = p->pMemClassesFree; + p->pMemClassesFree += 2 * Vec_PtrSize(p->vClassNew); + Vec_PtrForEachEntry( p->vClassNew, pObj, i ) + { + ppClass[i] = pObj; + ppClass[Vec_PtrSize(p->vClassNew)+i] = NULL; + Fra_ClassObjSetRepr( pObj, i? ppClass[0] : NULL ); + } + assert( ppClass[0] != NULL ); + Vec_PtrPush( p->vClasses, ppClass ); + // iteratively refine this class + if ( fRefineNewClass ) + nRefis += Fra_RefineClassLastIter( p, p->vClasses ); + else if ( pSkipped ) + (*pSkipped)++; + return nRefis; +} + +/**Function************************************************************* + + Synopsis [Starts representation of equivalence classes with one class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesTest( Fra_Cla_t * p, int Id1, int Id2 ) +{ + Aig_Obj_t ** pClass; + p->pMemClasses = ALLOC( Aig_Obj_t *, 4 ); + pClass = p->pMemClasses; + assert( Id1 < Id2 ); + pClass[0] = Aig_ManObj( p->pAig, Id1 ); + pClass[1] = Aig_ManObj( p->pAig, Id2 ); + pClass[2] = NULL; + pClass[3] = NULL; + Fra_ClassObjSetRepr( pClass[1], pClass[0] ); + Vec_PtrPush( p->vClasses, pClass ); +} + +/**Function************************************************************* + + Synopsis [Creates latch correspondence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesLatchCorr( Fra_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i, nEntries = 0; + Vec_PtrClear( p->pCla->vClasses1 ); + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + { + Vec_PtrPush( p->pCla->vClasses1, pObj ); + Fra_ClassObjSetRepr( pObj, Aig_ManConst1(p->pManAig) ); + } + // allocate room for classes + p->pCla->pMemClasses = ALLOC( Aig_Obj_t *, 2*(nEntries + Vec_PtrSize(p->pCla->vClasses1)) ); + p->pCla->pMemClassesFree = p->pCla->pMemClasses + 2*nEntries; +} + +/**Function************************************************************* + + Synopsis [Postprocesses the classes by removing half of the less useful.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesPostprocess( Fra_Cla_t * p ) +{ + int Ratio = 2; + Fra_Sml_t * pComb; + Aig_Obj_t * pObj, * pRepr, ** ppClass; + int * pWeights, WeightMax = 0, i, k, c; + // perform combinational simulation + pComb = Fra_SmlSimulateComb( p->pAig, 32 ); + // compute the weight of each node in the classes + pWeights = ALLOC( int, Aig_ManObjNumMax(p->pAig) ); + memset( pWeights, 0, sizeof(int) * Aig_ManObjNumMax(p->pAig) ); + Aig_ManForEachObj( p->pAig, pObj, i ) + { + pRepr = Fra_ClassObjRepr( pObj ); + if ( pRepr == NULL ) + continue; + pWeights[i] = Fra_SmlNodeNotEquWeight( pComb, pRepr->Id, pObj->Id ); + WeightMax = AIG_MAX( WeightMax, pWeights[i] ); + } + Fra_SmlStop( pComb ); + printf( "Before: Const = %6d. Class = %6d. ", Vec_PtrSize(p->vClasses1), Vec_PtrSize(p->vClasses) ); + // remove nodes from classes whose weight is less than WeightMax/Ratio + k = 0; + Vec_PtrForEachEntry( p->vClasses1, pObj, i ) + { + if ( pWeights[pObj->Id] >= WeightMax/Ratio ) + Vec_PtrWriteEntry( p->vClasses1, k++, pObj ); + else + Fra_ClassObjSetRepr( pObj, NULL ); + } + Vec_PtrShrink( p->vClasses1, k ); + // in each class, compact the nodes + Vec_PtrForEachEntry( p->vClasses, ppClass, i ) + { + k = 1; + for ( c = 1; ppClass[c]; c++ ) + { + if ( pWeights[ppClass[c]->Id] >= WeightMax/Ratio ) + ppClass[k++] = ppClass[c]; + else + Fra_ClassObjSetRepr( ppClass[c], NULL ); + } + ppClass[k] = NULL; + } + // remove classes with only repr + k = 0; + Vec_PtrForEachEntry( p->vClasses, ppClass, i ) + if ( ppClass[1] != NULL ) + Vec_PtrWriteEntry( p->vClasses, k++, ppClass ); + Vec_PtrShrink( p->vClasses, k ); + printf( "After: Const = %6d. Class = %6d. \n", Vec_PtrSize(p->vClasses1), Vec_PtrSize(p->vClasses) ); + free( pWeights ); +} + +/**Function************************************************************* + + Synopsis [Postprocesses the classes by selecting representative lowest in top order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassesSelectRepr( Fra_Cla_t * p ) +{ + Aig_Obj_t ** pClass, * pNodeMin; + int i, c, cMinSupp, nSuppSizeMin, nSuppSizeCur; + // reassign representatives in each class + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + // collect support sizes and find the min-support node + cMinSupp = -1; + pNodeMin = NULL; + nSuppSizeMin = AIG_INFINITY; + for ( c = 0; pClass[c]; c++ ) + { + nSuppSizeCur = Aig_SupportSize( p->pAig, pClass[c] ); +// nSuppSizeCur = 1; + if ( nSuppSizeMin > nSuppSizeCur || + (nSuppSizeMin == nSuppSizeCur && pNodeMin->Level > pClass[c]->Level) ) + { + nSuppSizeMin = nSuppSizeCur; + pNodeMin = pClass[c]; + cMinSupp = c; + } + } + // skip the case when the repr did not change + if ( cMinSupp == 0 ) + continue; + // make the new node the representative of the class + pClass[cMinSupp] = pClass[0]; + pClass[0] = pNodeMin; + // set the representative + for ( c = 0; pClass[c]; c++ ) + Fra_ClassObjSetRepr( pClass[c], c? pClass[0] : NULL ); + } +} + + + +static inline Aig_Obj_t * Fra_ObjEqu( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj ) { return ppEquivs[pObj->Id]; } +static inline void Fra_ObjSetEqu( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj, Aig_Obj_t * pNode ) { ppEquivs[pObj->Id] = pNode; } + +static inline Aig_Obj_t * Fra_ObjChild0Equ( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj ) { return Aig_NotCond(Fra_ObjEqu(ppEquivs,Aig_ObjFanin0(pObj)), Aig_ObjFaninC0(pObj)); } +static inline Aig_Obj_t * Fra_ObjChild1Equ( Aig_Obj_t ** ppEquivs, Aig_Obj_t * pObj ) { return Aig_NotCond(Fra_ObjEqu(ppEquivs,Aig_ObjFanin1(pObj)), Aig_ObjFaninC1(pObj)); } + +/**Function************************************************************* + + Synopsis [Add the node and its constraints to the new AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Fra_ClassesDeriveNode( Aig_Man_t * pManFraig, Aig_Obj_t * pObj, Aig_Obj_t ** ppEquivs ) +{ + Aig_Obj_t * pObjNew, * pObjRepr, * pObjReprNew, * pMiter;//, * pObjNew2; + // skip nodes without representative + if ( (pObjRepr = Fra_ClassObjRepr(pObj)) == NULL ) + return; + assert( pObjRepr->Id < pObj->Id ); + // get the new node + pObjNew = Fra_ObjEqu( ppEquivs, pObj ); + // get the new node of the representative + pObjReprNew = Fra_ObjEqu( ppEquivs, pObjRepr ); + // if this is the same node, no need to add constraints + if ( Aig_Regular(pObjNew) == Aig_Regular(pObjReprNew) ) + return; + // these are different nodes - perform speculative reduction +// pObjNew2 = Aig_NotCond( pObjReprNew, pObj->fPhase ^ pObjRepr->fPhase ); + // set the new node +// Fra_ObjSetEqu( ppEquivs, pObj, pObjNew2 ); + // add the constraint + pMiter = Aig_Exor( pManFraig, Aig_Regular(pObjNew), Aig_Regular(pObjReprNew) ); + pMiter = Aig_NotCond( pMiter, Aig_Regular(pMiter)->fPhase ^ Aig_IsComplement(pMiter) ); + pMiter = Aig_Not( pMiter ); + Aig_ObjCreatePo( pManFraig, pMiter ); +} + +/**Function************************************************************* + + Synopsis [Derives AIG for the partitioned problem.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_ClassesDeriveAig( Fra_Cla_t * p, int nFramesK ) +{ + Aig_Man_t * pManFraig; + Aig_Obj_t * pObj, * pObjNew; + Aig_Obj_t ** pLatches, ** ppEquivs; + int i, k, f, nFramesAll = nFramesK + 1; + assert( Aig_ManRegNum(p->pAig) > 0 ); + assert( Aig_ManRegNum(p->pAig) < Aig_ManPiNum(p->pAig) ); + assert( nFramesK > 0 ); + // start the fraig package + pManFraig = Aig_ManStart( Aig_ManObjNumMax(p->pAig) * nFramesAll ); + pManFraig->pName = Aig_UtilStrsav( p->pAig->pName ); + // allocate place for the node mapping + ppEquivs = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(p->pAig) ); + Fra_ObjSetEqu( ppEquivs, Aig_ManConst1(p->pAig), Aig_ManConst1(pManFraig) ); + // create latches for the first frame + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Fra_ObjSetEqu( ppEquivs, pObj, Aig_ObjCreatePi(pManFraig) ); + // add timeframes + pLatches = ALLOC( Aig_Obj_t *, Aig_ManRegNum(p->pAig) ); + for ( f = 0; f < nFramesAll; f++ ) + { + // create PIs for this frame + Aig_ManForEachPiSeq( p->pAig, pObj, i ) + Fra_ObjSetEqu( ppEquivs, pObj, Aig_ObjCreatePi(pManFraig) ); + // set the constraints on the latch outputs + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Fra_ClassesDeriveNode( pManFraig, pObj, ppEquivs ); + // add internal nodes of this frame + Aig_ManForEachNode( p->pAig, pObj, i ) + { + pObjNew = Aig_And( pManFraig, Fra_ObjChild0Equ(ppEquivs, pObj), Fra_ObjChild1Equ(ppEquivs, pObj) ); + Fra_ObjSetEqu( ppEquivs, pObj, pObjNew ); + Fra_ClassesDeriveNode( pManFraig, pObj, ppEquivs ); + } + if ( f == nFramesAll - 1 ) + break; + if ( f == nFramesAll - 2 ) + pManFraig->nAsserts = Aig_ManPoNum(pManFraig); + // save the latch input values + k = 0; + Aig_ManForEachLiSeq( p->pAig, pObj, i ) + pLatches[k++] = Fra_ObjChild0Equ( ppEquivs, pObj ); + // insert them to the latch output values + k = 0; + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Fra_ObjSetEqu( ppEquivs, pObj, pLatches[k++] ); + } + free( pLatches ); + free( ppEquivs ); + // mark the asserts + assert( Aig_ManPoNum(pManFraig) % nFramesAll == 0 ); +printf( "Assert miters = %6d. Output miters = %6d.\n", + pManFraig->nAsserts, Aig_ManPoNum(pManFraig) - pManFraig->nAsserts ); + // remove dangling nodes + Aig_ManCleanup( pManFraig ); + return pManFraig; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraCnf.c b/src/aig/fra/fraCnf.c new file mode 100644 index 00000000..d96fe8a1 --- /dev/null +++ b/src/aig/fra/fraCnf.c @@ -0,0 +1,284 @@ +/**CFile**************************************************************** + + FileName [fraCnf.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraCnf.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + + +/**Function************************************************************* + + Synopsis [Addes clauses to the solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_AddClausesMux( Fra_Man_t * p, Aig_Obj_t * pNode ) +{ + Aig_Obj_t * pNodeI, * pNodeT, * pNodeE; + int pLits[4], RetValue, VarF, VarI, VarT, VarE, fCompT, fCompE; + + assert( !Aig_IsComplement( pNode ) ); + assert( Aig_ObjIsMuxType( pNode ) ); + // get nodes (I = if, T = then, E = else) + pNodeI = Aig_ObjRecognizeMux( pNode, &pNodeT, &pNodeE ); + // get the variable numbers + VarF = Fra_ObjSatNum(pNode); + VarI = Fra_ObjSatNum(pNodeI); + VarT = Fra_ObjSatNum(Aig_Regular(pNodeT)); + VarE = Fra_ObjSatNum(Aig_Regular(pNodeE)); + // get the complementation flags + fCompT = Aig_IsComplement(pNodeT); + fCompE = Aig_IsComplement(pNodeE); + + // f = ITE(i, t, e) + + // i' + t' + f + // i' + t + f' + // i + e' + f + // i + e + f' + + // create four clauses + pLits[0] = toLitCond(VarI, 1); + pLits[1] = toLitCond(VarT, 1^fCompT); + pLits[2] = toLitCond(VarF, 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarI, 1); + pLits[1] = toLitCond(VarT, 0^fCompT); + pLits[2] = toLitCond(VarF, 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarI, 0); + pLits[1] = toLitCond(VarE, 1^fCompE); + pLits[2] = toLitCond(VarF, 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarI, 0); + pLits[1] = toLitCond(VarE, 0^fCompE); + pLits[2] = toLitCond(VarF, 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + + // two additional clauses + // t' & e' -> f' + // t & e -> f + + // t + e + f' + // t' + e' + f + + if ( VarT == VarE ) + { +// assert( fCompT == !fCompE ); + return; + } + + pLits[0] = toLitCond(VarT, 0^fCompT); + pLits[1] = toLitCond(VarE, 0^fCompE); + pLits[2] = toLitCond(VarF, 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarT, 1^fCompT); + pLits[1] = toLitCond(VarE, 1^fCompE); + pLits[2] = toLitCond(VarF, 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); +} + +/**Function************************************************************* + + Synopsis [Addes clauses to the solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_AddClausesSuper( Fra_Man_t * p, Aig_Obj_t * pNode, Vec_Ptr_t * vSuper ) +{ + Aig_Obj_t * pFanin; + int * pLits, nLits, RetValue, i; + assert( !Aig_IsComplement(pNode) ); + assert( Aig_ObjIsNode( pNode ) ); + // create storage for literals + nLits = Vec_PtrSize(vSuper) + 1; + pLits = ALLOC( int, nLits ); + // suppose AND-gate is A & B = C + // add !A => !C or A + !C + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + pLits[0] = toLitCond(Fra_ObjSatNum(Aig_Regular(pFanin)), Aig_IsComplement(pFanin)); + pLits[1] = toLitCond(Fra_ObjSatNum(pNode), 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + } + // add A & B => C or !A + !B + C + Vec_PtrForEachEntry( vSuper, pFanin, i ) + pLits[i] = toLitCond(Fra_ObjSatNum(Aig_Regular(pFanin)), !Aig_IsComplement(pFanin)); + pLits[nLits-1] = toLitCond(Fra_ObjSatNum(pNode), 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + nLits ); + assert( RetValue ); + free( pLits ); +} + +/**Function************************************************************* + + Synopsis [Collects the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_CollectSuper_rec( Aig_Obj_t * pObj, Vec_Ptr_t * vSuper, int fFirst, int fUseMuxes ) +{ + // if the new node is complemented or a PI, another gate begins + if ( Aig_IsComplement(pObj) || Aig_ObjIsPi(pObj) || (!fFirst && Aig_ObjRefs(pObj) > 1) || + (fUseMuxes && Aig_ObjIsMuxType(pObj)) ) + { + Vec_PtrPushUnique( vSuper, pObj ); + return; + } + // go through the branches + Fra_CollectSuper_rec( Aig_ObjChild0(pObj), vSuper, 0, fUseMuxes ); + Fra_CollectSuper_rec( Aig_ObjChild1(pObj), vSuper, 0, fUseMuxes ); +} + +/**Function************************************************************* + + Synopsis [Collects the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Fra_CollectSuper( Aig_Obj_t * pObj, int fUseMuxes ) +{ + Vec_Ptr_t * vSuper; + assert( !Aig_IsComplement(pObj) ); + assert( !Aig_ObjIsPi(pObj) ); + vSuper = Vec_PtrAlloc( 4 ); + Fra_CollectSuper_rec( pObj, vSuper, 1, fUseMuxes ); + return vSuper; +} + +/**Function************************************************************* + + Synopsis [Updates the solver clause database.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ObjAddToFrontier( Fra_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vFrontier ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( Fra_ObjSatNum(pObj) ) + return; + assert( Fra_ObjSatNum(pObj) == 0 ); + assert( Fra_ObjFaninVec(pObj) == NULL ); + if ( Aig_ObjIsConst1(pObj) ) + return; + Fra_ObjSetSatNum( pObj, p->nSatVars++ ); + if ( Aig_ObjIsNode(pObj) ) + Vec_PtrPush( vFrontier, pObj ); +} + +/**Function************************************************************* + + Synopsis [Updates the solver clause database.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_CnfNodeAddToSolver( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew ) +{ + Vec_Ptr_t * vFrontier, * vFanins; + Aig_Obj_t * pNode, * pFanin; + int i, k, fUseMuxes = 1; + assert( pOld || pNew ); + // quit if CNF is ready + if ( (!pOld || Fra_ObjFaninVec(pOld)) && (!pNew || Fra_ObjFaninVec(pNew)) ) + return; + // start the frontier + vFrontier = Vec_PtrAlloc( 100 ); + if ( pOld ) Fra_ObjAddToFrontier( p, pOld, vFrontier ); + if ( pNew ) Fra_ObjAddToFrontier( p, pNew, vFrontier ); + // explore nodes in the frontier + Vec_PtrForEachEntry( vFrontier, pNode, i ) + { + // create the supergate + assert( Fra_ObjSatNum(pNode) ); + assert( Fra_ObjFaninVec(pNode) == NULL ); + if ( fUseMuxes && Aig_ObjIsMuxType(pNode) ) + { + vFanins = Vec_PtrAlloc( 4 ); + Vec_PtrPushUnique( vFanins, Aig_ObjFanin0( Aig_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( vFanins, Aig_ObjFanin0( Aig_ObjFanin1(pNode) ) ); + Vec_PtrPushUnique( vFanins, Aig_ObjFanin1( Aig_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( vFanins, Aig_ObjFanin1( Aig_ObjFanin1(pNode) ) ); + Vec_PtrForEachEntry( vFanins, pFanin, k ) + Fra_ObjAddToFrontier( p, Aig_Regular(pFanin), vFrontier ); + Fra_AddClausesMux( p, pNode ); + } + else + { + vFanins = Fra_CollectSuper( pNode, fUseMuxes ); + Vec_PtrForEachEntry( vFanins, pFanin, k ) + Fra_ObjAddToFrontier( p, Aig_Regular(pFanin), vFrontier ); + Fra_AddClausesSuper( p, pNode, vFanins ); + } + assert( Vec_PtrSize(vFanins) > 1 ); + Fra_ObjSetFaninVec( pNode, vFanins ); + } + Vec_PtrFree( vFrontier ); +} + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraCore.c b/src/aig/fra/fraCore.c new file mode 100644 index 00000000..ad73501f --- /dev/null +++ b/src/aig/fra/fraCore.c @@ -0,0 +1,433 @@ +/**CFile**************************************************************** + + FileName [fraCore.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraCore.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/* + Speculating reduction in the sequential case leads to an interesting + situation when a counter-ex may not refine any classes. This happens + for non-constant equivalence classes. In such cases the representative + of the class (proved by simulation to be non-constant) may be reduced + to a constant during the speculative reduction. The fraig-representative + of this representative node is a constant node, even though this is a + non-constant class. Experiments have shown that this situation happens + very often at the beginning of the refinement iteration when there are + many spurious candidate equivalence classes (especially if heavy-duty + simulatation of BMC was node used at the beginning). As a result, the + SAT solver run may return a counter-ex that distinguishes the given + representative node from the constant-1 node but this counter-ex + does not distinguish the nodes in the non-costant class... This is why + there is no check of refinment after a counter-ex in the sequential case. +*/ + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Reports the status of the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_FraigMiterStatus( Aig_Man_t * p ) +{ + Aig_Obj_t * pObj, * pObjNew; + int i, CountConst0 = 0, CountNonConst0 = 0, CountUndecided = 0; + if ( p->pData ) + return 0; + Aig_ManForEachPoSeq( p, pObj, i ) + { + pObjNew = Aig_ObjChild0(pObj); + // check if the output is constant 0 + if ( pObjNew == Aig_ManConst0(p) ) + { + CountConst0++; + continue; + } + // check if the output is constant 1 + if ( pObjNew == Aig_ManConst1(p) ) + { + CountNonConst0++; + continue; + } + // check if the output can be not constant 0 + if ( Aig_Regular(pObjNew)->fPhase != (unsigned)Aig_IsComplement(pObjNew) ) + { + CountNonConst0++; + continue; + } + CountUndecided++; + } +/* + if ( p->pParams->fVerbose ) + { + printf( "Miter has %d outputs. ", Aig_ManPoNum(p->pManAig) ); + printf( "Const0 = %d. ", CountConst0 ); + printf( "NonConst0 = %d. ", CountNonConst0 ); + printf( "Undecided = %d. ", CountUndecided ); + printf( "\n" ); + } +*/ + if ( CountNonConst0 ) + return 0; + if ( CountUndecided ) + return -1; + return 1; +} + +/**Function************************************************************* + + Synopsis [Write speculative miter for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Fra_FraigNodeSpeculate( Fra_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pObjFraig, Aig_Obj_t * pObjReprFraig ) +{ + static int Counter = 0; + char FileName[20]; + Aig_Man_t * pTemp; + Aig_Obj_t * pNode; + int i; + // create manager with the logic for these two nodes + pTemp = Aig_ManExtractMiter( p->pManFraig, pObjFraig, pObjReprFraig ); + // dump the logic into a file + sprintf( FileName, "aig\\%03d.blif", ++Counter ); + Aig_ManDumpBlif( pTemp, FileName ); + printf( "Speculation cone with %d nodes was written into file \"%s\".\n", Aig_ManNodeNum(pTemp), FileName ); + // clean up + Aig_ManStop( pTemp ); + Aig_ManForEachObj( p->pManFraig, pNode, i ) + pNode->pData = p; +} + +/**Function************************************************************* + + Synopsis [Verifies the generated counter-ex.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_FraigVerifyCounterEx( Fra_Man_t * p, Vec_Int_t * vCex ) +{ + Aig_Obj_t * pObj, ** ppClass; + int i, c; + assert( Aig_ManPiNum(p->pManAig) == Vec_IntSize(vCex) ); + // make sure the input pattern is not used + Aig_ManForEachObj( p->pManAig, pObj, i ) + assert( !pObj->fMarkB ); + // simulate the cex through the AIG + Aig_ManConst1(p->pManAig)->fMarkB = 1; + Aig_ManForEachPi( p->pManAig, pObj, i ) + pObj->fMarkB = Vec_IntEntry(vCex, i); + Aig_ManForEachNode( p->pManAig, pObj, i ) + pObj->fMarkB = (Aig_ObjFanin0(pObj)->fMarkB ^ Aig_ObjFaninC0(pObj)) & + (Aig_ObjFanin1(pObj)->fMarkB ^ Aig_ObjFaninC1(pObj)); + Aig_ManForEachPo( p->pManAig, pObj, i ) + pObj->fMarkB = Aig_ObjFanin0(pObj)->fMarkB ^ Aig_ObjFaninC0(pObj); + // check if the classes hold + Vec_PtrForEachEntry( p->pCla->vClasses1, pObj, i ) + { + if ( pObj->fPhase != pObj->fMarkB ) + printf( "The node %d is not constant under cex!\n", pObj->Id ); + } + Vec_PtrForEachEntry( p->pCla->vClasses, ppClass, i ) + { + for ( c = 1; ppClass[c]; c++ ) + if ( (ppClass[0]->fPhase ^ ppClass[c]->fPhase) != (ppClass[0]->fMarkB ^ ppClass[c]->fMarkB) ) + printf( "The nodes %d and %d are not equal under cex!\n", ppClass[0]->Id, ppClass[c]->Id ); +// for ( c = 0; ppClass[c]; c++ ) +// if ( Fra_ObjFraig(ppClass[c],p->pPars->nFramesK) == Aig_ManConst1(p->pManFraig) ) +// printf( "A member of non-constant class has a constant repr!\n" ); + } + // clean the simulation pattern + Aig_ManForEachObj( p->pManAig, pObj, i ) + pObj->fMarkB = 0; +} + +/**Function************************************************************* + + Synopsis [Performs fraiging for one node.] + + Description [Returns the fraiged node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Fra_FraigNode( Fra_Man_t * p, Aig_Obj_t * pObj ) +{ + Aig_Obj_t * pObjRepr, * pObjFraig, * pObjFraig2, * pObjReprFraig; + int RetValue; + assert( !Aig_IsComplement(pObj) ); + // get representative of this class + pObjRepr = Fra_ClassObjRepr( pObj ); + if ( pObjRepr == NULL || // this is a unique node + (!p->pPars->fDoSparse && pObjRepr == Aig_ManConst1(p->pManAig)) ) // this is a sparse node + return; + // get the fraiged node + pObjFraig = Fra_ObjFraig( pObj, p->pPars->nFramesK ); + // get the fraiged representative + pObjReprFraig = Fra_ObjFraig( pObjRepr, p->pPars->nFramesK ); + // if the fraiged nodes are the same, return + if ( Aig_Regular(pObjFraig) == Aig_Regular(pObjReprFraig) ) + { + p->nSatCallsSkipped++; + return; + } + assert( p->pPars->nFramesK || Aig_Regular(pObjFraig) != Aig_ManConst1(p->pManFraig) ); + // if they are proved different, the c-ex will be in p->pPatWords + RetValue = Fra_NodesAreEquiv( p, Aig_Regular(pObjReprFraig), Aig_Regular(pObjFraig) ); + if ( RetValue == 1 ) // proved equivalent + { +// if ( p->pPars->fChoicing ) +// Aig_ObjCreateRepr( p->pManFraig, Aig_Regular(pObjReprFraig), Aig_Regular(pObjFraig) ); + // the nodes proved equal + pObjFraig2 = Aig_NotCond( pObjReprFraig, pObj->fPhase ^ pObjRepr->fPhase ); + Fra_ObjSetFraig( pObj, p->pPars->nFramesK, pObjFraig2 ); + return; + } + if ( RetValue == -1 ) // failed + { + if ( p->vTimeouts == NULL ) + p->vTimeouts = Vec_PtrAlloc( 100 ); + Vec_PtrPush( p->vTimeouts, pObj ); + if ( !p->pPars->fSpeculate ) + return; + assert( 0 ); + // speculate + p->nSpeculs++; + pObjFraig2 = Aig_NotCond( pObjReprFraig, pObj->fPhase ^ pObjRepr->fPhase ); + Fra_ObjSetFraig( pObj, p->pPars->nFramesK, pObjFraig2 ); + Fra_FraigNodeSpeculate( p, pObj, Aig_Regular(pObjFraig), Aig_Regular(pObjReprFraig) ); + return; + } + // disprove the nodes + p->pCla->fRefinement = 1; + // if we do not include the node into those disproved, we may end up + // merging this node with another representative, for which proof has timed out + if ( p->vTimeouts ) + Vec_PtrPush( p->vTimeouts, pObj ); + // verify that the counter-example satisfies all the constraints +// if ( p->vCex ) +// Fra_FraigVerifyCounterEx( p, p->vCex ); + // simulate the counter-example and return the Fraig node + Fra_SmlResimulate( p ); + if ( !p->pPars->nFramesK && Fra_ClassObjRepr(pObj) == pObjRepr ) + printf( "Fra_FraigNode(): Error in class refinement!\n" ); + assert( p->pPars->nFramesK || Fra_ClassObjRepr(pObj) != pObjRepr ); +} + +/**Function************************************************************* + + Synopsis [Performs fraiging for the internal nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_FraigSweep( Fra_Man_t * p ) +{ +// Bar_Progress_t * pProgress = NULL; + Aig_Obj_t * pObj, * pObjNew; + int i, Pos = 0; + // fraig latch outputs + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + { + Fra_FraigNode( p, pObj ); + if ( p->pPars->fUseImps ) + Pos = Fra_ImpCheckForNode( p, p->pCla->vImps, pObj, Pos ); + } + if ( p->pPars->fLatchCorr ) + return; + // fraig internal nodes +// if ( !p->pPars->fDontShowBar ) +// pProgress = Bar_ProgressStart( stdout, Aig_ManObjNumMax(p->pManAig) ); + Aig_ManForEachNode( p->pManAig, pObj, i ) + { +// if ( pProgress ) +// Bar_ProgressUpdate( pProgress, i, NULL ); + // derive and remember the new fraig node + pObjNew = Aig_And( p->pManFraig, Fra_ObjChild0Fra(pObj,p->pPars->nFramesK), Fra_ObjChild1Fra(pObj,p->pPars->nFramesK) ); + Fra_ObjSetFraig( pObj, p->pPars->nFramesK, pObjNew ); + Aig_Regular(pObjNew)->pData = p; + // quit if simulation detected a counter-example for a PO + if ( p->pManFraig->pData ) + continue; + // perform fraiging + Fra_FraigNode( p, pObj ); + if ( p->pPars->fUseImps ) + Pos = Fra_ImpCheckForNode( p, p->pCla->vImps, pObj, Pos ); + } +// if ( pProgress ) +// Bar_ProgressStop( pProgress ); + // try to prove the outputs of the miter + p->nNodesMiter = Aig_ManNodeNum(p->pManFraig); +// Fra_MiterStatus( p->pManFraig ); +// if ( p->pPars->fProve && p->pManFraig->pData == NULL ) +// Fra_MiterProve( p ); + // compress implications after processing all of them + if ( p->pPars->fUseImps ) + Fra_ImpCompactArray( p->pCla->vImps ); +} + +/**Function************************************************************* + + Synopsis [Performs fraiging of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_FraigPerform( Aig_Man_t * pManAig, Fra_Par_t * pPars ) +{ + Fra_Man_t * p; + Aig_Man_t * pManAigNew; + int clk; + if ( Aig_ManNodeNum(pManAig) == 0 ) + return Aig_ManDup(pManAig, 1); +clk = clock(); + assert( Aig_ManLatchNum(pManAig) == 0 ); + p = Fra_ManStart( pManAig, pPars ); + p->pManFraig = Fra_ManPrepareComb( p ); + p->pSml = Fra_SmlStart( pManAig, 0, 1, pPars->nSimWords ); + Fra_SmlSimulate( p, 0 ); +// if ( p->pPars->fChoicing ) +// Aig_ManReprStart( p->pManFraig, Aig_ManObjNumMax(p->pManAig) ); + // collect initial states + p->nLitsBeg = Fra_ClassesCountLits( p->pCla ); + p->nNodesBeg = Aig_ManNodeNum(pManAig); + p->nRegsBeg = Aig_ManRegNum(pManAig); + // perform fraig sweep + Fra_FraigSweep( p ); + // call back the procedure to check implications + if ( pManAig->pImpFunc ) + pManAig->pImpFunc( p, pManAig->pImpData ); + // finalize the fraiged manager + Fra_ManFinalizeComb( p ); + if ( p->pPars->fChoicing ) + { +int clk2 = clock(); + Fra_ClassesCopyReprs( p->pCla, p->vTimeouts ); + pManAigNew = Aig_ManDupRepr( p->pManAig, 1 ); + Aig_ManReprStart( pManAigNew, Aig_ManObjNumMax(pManAigNew) ); + Aig_ManTransferRepr( pManAigNew, p->pManAig ); + Aig_ManMarkValidChoices( pManAigNew ); + Aig_ManStop( p->pManFraig ); + p->pManFraig = NULL; +p->timeTrav += clock() - clk2; + } + else + { + Aig_ManCleanup( p->pManFraig ); + pManAigNew = p->pManFraig; + p->pManFraig = NULL; + } +p->timeTotal = clock() - clk; + // collect final stats + p->nLitsEnd = Fra_ClassesCountLits( p->pCla ); + p->nNodesEnd = Aig_ManNodeNum(pManAigNew); + p->nRegsEnd = Aig_ManRegNum(pManAigNew); + Fra_ManStop( p ); + return pManAigNew; +} + +/**Function************************************************************* + + Synopsis [Performs choicing of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_FraigChoice( Aig_Man_t * pManAig, int nConfMax ) +{ + Fra_Par_t Pars, * pPars = &Pars; + Fra_ParamsDefault( pPars ); + pPars->nBTLimitNode = nConfMax; + pPars->fChoicing = 1; + pPars->fDoSparse = 1; + pPars->fSpeculate = 0; + pPars->fProve = 0; + pPars->fVerbose = 0; + pPars->fDontShowBar = 1; + return Fra_FraigPerform( pManAig, pPars ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_FraigEquivence( Aig_Man_t * pManAig, int nConfMax ) +{ + Aig_Man_t * pFraig; + Fra_Par_t Pars, * pPars = &Pars; + Fra_ParamsDefault( pPars ); + pPars->nBTLimitNode = nConfMax; + pPars->fChoicing = 0; + pPars->fDoSparse = 1; + pPars->fSpeculate = 0; + pPars->fProve = 0; + pPars->fVerbose = 0; + pPars->fDontShowBar = 1; + pFraig = Fra_FraigPerform( pManAig, pPars ); + return pFraig; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraImp.c b/src/aig/fra/fraImp.c new file mode 100644 index 00000000..a5fc7d58 --- /dev/null +++ b/src/aig/fra/fraImp.c @@ -0,0 +1,721 @@ +/**CFile**************************************************************** + + FileName [fraImp.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Detecting and proving implications.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraImp.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Counts the number of 1s in each siminfo of each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Fra_SmlCountOnesOne( Fra_Sml_t * p, int Node ) +{ + unsigned * pSim; + int k, Counter = 0; + pSim = Fra_ObjSim( p, Node ); + for ( k = p->nWordsPref; k < p->nWordsTotal; k++ ) + Counter += Aig_WordCountOnes( pSim[k] ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Counts the number of 1s in each siminfo of each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int * Fra_SmlCountOnes( Fra_Sml_t * p ) +{ + Aig_Obj_t * pObj; + int i, * pnBits; + pnBits = ALLOC( int, Aig_ManObjNumMax(p->pAig) ); + memset( pnBits, 0, sizeof(int) * Aig_ManObjNumMax(p->pAig) ); + Aig_ManForEachObj( p->pAig, pObj, i ) + pnBits[i] = Fra_SmlCountOnesOne( p, i ); + return pnBits; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if implications holds.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Sml_NodeCheckImp( Fra_Sml_t * p, int Left, int Right ) +{ + unsigned * pSimL, * pSimR; + int k; + pSimL = Fra_ObjSim( p, Left ); + pSimR = Fra_ObjSim( p, Right ); + for ( k = p->nWordsPref; k < p->nWordsTotal; k++ ) + if ( pSimL[k] & ~pSimR[k] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Counts the number of 1s in the complement of the implication.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Sml_NodeNotImpWeight( Fra_Sml_t * p, int Left, int Right ) +{ + unsigned * pSimL, * pSimR; + int k, Counter = 0; + pSimL = Fra_ObjSim( p, Left ); + pSimR = Fra_ObjSim( p, Right ); + for ( k = p->nWordsPref; k < p->nWordsTotal; k++ ) + Counter += Aig_WordCountOnes( pSimL[k] & ~pSimR[k] ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Computes the complement of the implication.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Sml_NodeSaveNotImpPatterns( Fra_Sml_t * p, int Left, int Right, unsigned * pResult ) +{ + unsigned * pSimL, * pSimR; + int k; + pSimL = Fra_ObjSim( p, Left ); + pSimR = Fra_ObjSim( p, Right ); + for ( k = p->nWordsPref; k < p->nWordsTotal; k++ ) + pResult[k] |= pSimL[k] & ~pSimR[k]; +} + +/**Function************************************************************* + + Synopsis [Returns the array of nodes sorted by the number of 1s.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Fra_SmlSortUsingOnes( Fra_Sml_t * p, int fLatchCorr ) +{ + Aig_Obj_t * pObj; + Vec_Ptr_t * vNodes; + int i, nNodes, nTotal, nBits, * pnNodes, * pnBits, * pMemory; + assert( p->nWordsTotal > 0 ); + // count 1s in each node's siminfo + pnBits = Fra_SmlCountOnes( p ); + // count number of nodes having that many 1s + nNodes = 0; + nBits = p->nWordsTotal * 32; + pnNodes = ALLOC( int, nBits + 1 ); + memset( pnNodes, 0, sizeof(int) * (nBits + 1) ); + Aig_ManForEachObj( p->pAig, pObj, i ) + { + if ( i == 0 ) continue; + // skip non-PI and non-internal nodes + if ( fLatchCorr ) + { + if ( !Aig_ObjIsPi(pObj) ) + continue; + } + else + { + if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) ) + continue; + } + // skip nodes participating in the classes +// if ( Fra_ClassObjRepr(pObj) ) +// continue; + assert( pnBits[i] <= nBits ); // "<" because of normalized info + pnNodes[pnBits[i]]++; + nNodes++; + } + // allocate memory for all the nodes + pMemory = ALLOC( int, nNodes + nBits + 1 ); + // markup the memory for each node + vNodes = Vec_PtrAlloc( nBits + 1 ); + Vec_PtrPush( vNodes, pMemory ); + for ( i = 1; i <= nBits; i++ ) + { + pMemory += pnNodes[i-1] + 1; + Vec_PtrPush( vNodes, pMemory ); + } + // add the nodes + memset( pnNodes, 0, sizeof(int) * (nBits + 1) ); + Aig_ManForEachObj( p->pAig, pObj, i ) + { + if ( i == 0 ) continue; + // skip non-PI and non-internal nodes + if ( fLatchCorr ) + { + if ( !Aig_ObjIsPi(pObj) ) + continue; + } + else + { + if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) ) + continue; + } + // skip nodes participating in the classes +// if ( Fra_ClassObjRepr(pObj) ) +// continue; + pMemory = Vec_PtrEntry( vNodes, pnBits[i] ); + pMemory[ pnNodes[pnBits[i]]++ ] = i; + } + // add 0s in the end + nTotal = 0; + Vec_PtrForEachEntry( vNodes, pMemory, i ) + { + pMemory[ pnNodes[i]++ ] = 0; + nTotal += pnNodes[i]; + } + assert( nTotal == nNodes + nBits + 1 ); + free( pnNodes ); + free( pnBits ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Returns the array of implications with the highest cost.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Fra_SmlSelectMaxCost( Vec_Int_t * vImps, int * pCosts, int nCostMax, int nImpLimit, int * pCostRange ) +{ + Vec_Int_t * vImpsNew; + int * pCostCount, nImpCount, Imp, i, c; + assert( Vec_IntSize(vImps) >= nImpLimit ); + // count how many implications have each cost + pCostCount = ALLOC( int, nCostMax + 1 ); + memset( pCostCount, 0, sizeof(int) * (nCostMax + 1) ); + for ( i = 0; i < Vec_IntSize(vImps); i++ ) + { + assert( pCosts[i] <= nCostMax ); + pCostCount[ pCosts[i] ]++; + } + assert( pCostCount[0] == 0 ); + // select the bound on the cost (above this bound, implication will be included) + nImpCount = 0; + for ( c = nCostMax; c > 0; c-- ) + { + nImpCount += pCostCount[c]; + if ( nImpCount >= nImpLimit ) + break; + } +// printf( "Cost range >= %d.\n", c ); + // collect implications with the given costs + vImpsNew = Vec_IntAlloc( nImpLimit ); + Vec_IntForEachEntry( vImps, Imp, i ) + { + if ( pCosts[i] < c ) + continue; + Vec_IntPush( vImpsNew, Imp ); + if ( Vec_IntSize( vImpsNew ) == nImpLimit ) + break; + } + free( pCostCount ); + if ( pCostRange ) + *pCostRange = c; + return vImpsNew; +} + +/**Function************************************************************* + + Synopsis [Compares two implications using their largest ID.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Sml_CompareMaxId( unsigned short * pImp1, unsigned short * pImp2 ) +{ + int Max1 = AIG_MAX( pImp1[0], pImp1[1] ); + int Max2 = AIG_MAX( pImp2[0], pImp2[1] ); + if ( Max1 < Max2 ) + return -1; + if ( Max1 > Max2 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Derives implication candidates.] + + Description [Implication candidates have the property that + (1) they hold using sequential simulation information + (2) they do not hold using combinational simulation information + (3) they have as high expressive power as possible (heuristically) + that is, they are easy to disprove combinationally + meaning they cover relatively larger sequential subspace.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Fra_ImpDerive( Fra_Man_t * p, int nImpMaxLimit, int nImpUseLimit, int fLatchCorr ) +{ + int nSimWords = 64; + Fra_Sml_t * pSeq, * pComb; + Vec_Int_t * vImps, * vTemp; + Vec_Ptr_t * vNodes; + int * pImpCosts, * pNodesI, * pNodesK; + int nImpsTotal = 0, nImpsTried = 0, nImpsNonSeq = 0, nImpsComb = 0, nImpsCollected = 0; + int CostMin = AIG_INFINITY, CostMax = 0; + int i, k, Imp, CostRange, clk = clock(); + assert( Aig_ManObjNumMax(p->pManAig) < (1 << 15) ); + assert( nImpMaxLimit > 0 && nImpUseLimit > 0 && nImpUseLimit <= nImpMaxLimit ); + // normalize both managers + pComb = Fra_SmlSimulateComb( p->pManAig, nSimWords ); + pSeq = Fra_SmlSimulateSeq( p->pManAig, p->pPars->nFramesP, nSimWords, 1 ); + // get the nodes sorted by the number of 1s + vNodes = Fra_SmlSortUsingOnes( pSeq, fLatchCorr ); + // count the total number of implications + for ( k = nSimWords * 32; k > 0; k-- ) + for ( i = k - 1; i > 0; i-- ) + for ( pNodesI = Vec_PtrEntry( vNodes, i ); *pNodesI; pNodesI++ ) + for ( pNodesK = Vec_PtrEntry( vNodes, k ); *pNodesK; pNodesK++ ) + nImpsTotal++; + + // compute implications and their costs + pImpCosts = ALLOC( int, nImpMaxLimit ); + vImps = Vec_IntAlloc( nImpMaxLimit ); + for ( k = pSeq->nWordsTotal * 32; k > 0; k-- ) + for ( i = k - 1; i > 0; i-- ) + { + for ( pNodesI = Vec_PtrEntry( vNodes, i ); *pNodesI; pNodesI++ ) + for ( pNodesK = Vec_PtrEntry( vNodes, k ); *pNodesK; pNodesK++ ) + { + nImpsTried++; + if ( !Sml_NodeCheckImp(pSeq, *pNodesI, *pNodesK) ) + { + nImpsNonSeq++; + continue; + } + if ( Sml_NodeCheckImp(pComb, *pNodesI, *pNodesK) ) + { + nImpsComb++; + continue; + } + nImpsCollected++; + Imp = Fra_ImpCreate( *pNodesI, *pNodesK ); + pImpCosts[ Vec_IntSize(vImps) ] = Sml_NodeNotImpWeight(pComb, *pNodesI, *pNodesK); + CostMin = AIG_MIN( CostMin, pImpCosts[ Vec_IntSize(vImps) ] ); + CostMax = AIG_MAX( CostMax, pImpCosts[ Vec_IntSize(vImps) ] ); + Vec_IntPush( vImps, Imp ); + if ( Vec_IntSize(vImps) == nImpMaxLimit ) + goto finish; + } + } +finish: + Fra_SmlStop( pComb ); + Fra_SmlStop( pSeq ); + + // select implications with the highest cost + CostRange = CostMin; + if ( Vec_IntSize(vImps) > nImpUseLimit ) + { + vImps = Fra_SmlSelectMaxCost( vTemp = vImps, pImpCosts, nSimWords * 32, nImpUseLimit, &CostRange ); + Vec_IntFree( vTemp ); + } + + // dealloc + free( pImpCosts ); + free( Vec_PtrEntry(vNodes, 0) ); + Vec_PtrFree( vNodes ); + // reorder implications topologically + qsort( (void *)Vec_IntArray(vImps), Vec_IntSize(vImps), sizeof(int), + (int (*)(const void *, const void *)) Sml_CompareMaxId ); +if ( p->pPars->fVerbose ) +{ +printf( "Implications: All = %d. Try = %d. NonSeq = %d. Comb = %d. Res = %d.\n", + nImpsTotal, nImpsTried, nImpsNonSeq, nImpsComb, nImpsCollected ); +printf( "Implication weight: Min = %d. Pivot = %d. Max = %d. ", + CostMin, CostRange, CostMax ); +PRT( "Time", clock() - clk ); +} + return vImps; +} + + +// the following three procedures are called to +// - add implications to the SAT solver +// - check implications using the SAT solver +// - refine implications using after a cex is generated + +/**Function************************************************************* + + Synopsis [Add implication clauses to the SAT solver.] + + Description [Note that implications should be checked in the first frame!] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ImpAddToSolver( Fra_Man_t * p, Vec_Int_t * vImps, int * pSatVarNums ) +{ + sat_solver * pSat = p->pSat; + Aig_Obj_t * pLeft, * pRight; + Aig_Obj_t * pLeftF, * pRightF; + int pLits[2], Imp, Left, Right, i, f, status; + int fComplL, fComplR; + Vec_IntForEachEntry( vImps, Imp, i ) + { + // get the corresponding nodes + pLeft = Aig_ManObj( p->pManAig, Fra_ImpLeft(Imp) ); + pRight = Aig_ManObj( p->pManAig, Fra_ImpRight(Imp) ); + // check if all the nodes are present + for ( f = 0; f < p->pPars->nFramesK; f++ ) + { + // map these info fraig + pLeftF = Fra_ObjFraig( pLeft, f ); + pRightF = Fra_ObjFraig( pRight, f ); + if ( Aig_ObjIsNone(Aig_Regular(pLeftF)) || Aig_ObjIsNone(Aig_Regular(pRightF)) ) + { + Vec_IntWriteEntry( vImps, i, 0 ); + break; + } + } + if ( f < p->pPars->nFramesK ) + continue; + // add constraints in each timeframe + for ( f = 0; f < p->pPars->nFramesK; f++ ) + { + // map these info fraig + pLeftF = Fra_ObjFraig( pLeft, f ); + pRightF = Fra_ObjFraig( pRight, f ); + // get the corresponding SAT numbers + Left = pSatVarNums[ Aig_Regular(pLeftF)->Id ]; + Right = pSatVarNums[ Aig_Regular(pRightF)->Id ]; + assert( Left > 0 && Left < p->nSatVars ); + assert( Right > 0 && Right < p->nSatVars ); + // get the complemented attributes + fComplL = pLeft->fPhase ^ Aig_IsComplement(pLeftF); + fComplR = pRight->fPhase ^ Aig_IsComplement(pRightF); + // get the constraint + // L => R L' v R (complement = L & R') + pLits[0] = 2 * Left + !fComplL; + pLits[1] = 2 * Right + fComplR; + // add contraint to solver + if ( !sat_solver_addclause( pSat, pLits, pLits + 2 ) ) + { + sat_solver_delete( pSat ); + p->pSat = NULL; + return; + } + } + } + status = sat_solver_simplify(pSat); + if ( status == 0 ) + { + sat_solver_delete( pSat ); + p->pSat = NULL; + } +// printf( "Total imps = %d. ", Vec_IntSize(vImps) ); + Fra_ImpCompactArray( vImps ); +// printf( "Valid imps = %d. \n", Vec_IntSize(vImps) ); +} + +/**Function************************************************************* + + Synopsis [Check implications for the node (if they are present).] + + Description [Returns the new position in the array.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ImpCheckForNode( Fra_Man_t * p, Vec_Int_t * vImps, Aig_Obj_t * pNode, int Pos ) +{ + Aig_Obj_t * pLeft, * pRight; + Aig_Obj_t * pLeftF, * pRightF; + int i, Imp, Left, Right, Max, RetValue; + int fComplL, fComplR; + Vec_IntForEachEntryStart( vImps, Imp, i, Pos ) + { + if ( Imp == 0 ) + continue; + Left = Fra_ImpLeft(Imp); + Right = Fra_ImpRight(Imp); + Max = AIG_MAX( Left, Right ); + assert( Max >= pNode->Id ); + if ( Max > pNode->Id ) + return i; + // get the corresponding nodes + pLeft = Aig_ManObj( p->pManAig, Left ); + pRight = Aig_ManObj( p->pManAig, Right ); + // get the corresponding FRAIG nodes + pLeftF = Fra_ObjFraig( pLeft, p->pPars->nFramesK ); + pRightF = Fra_ObjFraig( pRight, p->pPars->nFramesK ); + // get the complemented attributes + fComplL = pLeft->fPhase ^ Aig_IsComplement(pLeftF); + fComplR = pRight->fPhase ^ Aig_IsComplement(pRightF); + // check equality + if ( Aig_Regular(pLeftF) == Aig_Regular(pRightF) ) + { + if ( fComplL == fComplR ) // x => x - always true + continue; + assert( fComplL != fComplR ); + // consider 4 possibilities: + // NOT(1) => 1 or 0 => 1 - always true + // 1 => NOT(1) or 1 => 0 - never true + // NOT(x) => x or x - not always true + // x => NOT(x) or NOT(x) - not always true + if ( Aig_ObjIsConst1(Aig_Regular(pLeftF)) && fComplL ) // proved implication + continue; + // disproved implication + p->pCla->fRefinement = 1; + Vec_IntWriteEntry( vImps, i, 0 ); + continue; + } + // check the implication + // - if true, a clause is added + // - if false, a cex is simulated + // make sure the implication is refined + RetValue = Fra_NodesAreImp( p, Aig_Regular(pLeftF), Aig_Regular(pRightF), fComplL, fComplR ); + if ( RetValue != 1 ) + { + p->pCla->fRefinement = 1; + if ( RetValue == 0 ) + Fra_SmlResimulate( p ); + if ( Vec_IntEntry(vImps, i) != 0 ) + printf( "Fra_ImpCheckForNode(): Implication is not refined!\n" ); + assert( Vec_IntEntry(vImps, i) == 0 ); + } + } + return i; +} + +/**Function************************************************************* + + Synopsis [Removes those implications that no longer hold.] + + Description [Returns 1 if refinement has happened.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ImpRefineUsingCex( Fra_Man_t * p, Vec_Int_t * vImps ) +{ + Aig_Obj_t * pLeft, * pRight; + int Imp, i, RetValue = 0; + Vec_IntForEachEntry( vImps, Imp, i ) + { + if ( Imp == 0 ) + continue; + // get the corresponding nodes + pLeft = Aig_ManObj( p->pManAig, Fra_ImpLeft(Imp) ); + pRight = Aig_ManObj( p->pManAig, Fra_ImpRight(Imp) ); + // check if implication holds using this simulation info + if ( !Sml_NodeCheckImp(p->pSml, pLeft->Id, pRight->Id) ) + { + Vec_IntWriteEntry( vImps, i, 0 ); + RetValue = 1; + } + } + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Removes empty implications.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ImpCompactArray( Vec_Int_t * vImps ) +{ + int i, k, Imp; + k = 0; + Vec_IntForEachEntry( vImps, Imp, i ) + if ( Imp ) + Vec_IntWriteEntry( vImps, k++, Imp ); + Vec_IntShrink( vImps, k ); +} + +/**Function************************************************************* + + Synopsis [Determines the ratio of the state space by computed implications.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +double Fra_ImpComputeStateSpaceRatio( Fra_Man_t * p ) +{ + int nSimWords = 64; + Fra_Sml_t * pComb; + unsigned * pResult; + double Ratio = 0.0; + int Left, Right, Imp, i; + if ( p->pCla->vImps == NULL || Vec_IntSize(p->pCla->vImps) == 0 ) + return Ratio; + // simulate the AIG manager with combinational patterns + pComb = Fra_SmlSimulateComb( p->pManAig, nSimWords ); + // go through the implications and collect where they do not hold + pResult = Fra_ObjSim( pComb, 0 ); + assert( pResult[0] == 0 ); + Vec_IntForEachEntry( p->pCla->vImps, Imp, i ) + { + Left = Fra_ImpLeft(Imp); + Right = Fra_ImpRight(Imp); + Sml_NodeSaveNotImpPatterns( pComb, Left, Right, pResult ); + } + // count the number of ones in this area + Ratio = 100.0 * Fra_SmlCountOnesOne( pComb, 0 ) / (32*(pComb->nWordsTotal-pComb->nWordsPref)); + Fra_SmlStop( pComb ); + return Ratio; +} + +/**Function************************************************************* + + Synopsis [Returns the number of failed implications.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_ImpVerifyUsingSimulation( Fra_Man_t * p ) +{ + int nFrames = 2000; + int nSimWords = 8; + Fra_Sml_t * pSeq; + char * pfFails; + int Left, Right, Imp, i, Counter; + if ( p->pCla->vImps == NULL || Vec_IntSize(p->pCla->vImps) == 0 ) + return 0; + // simulate the AIG manager with combinational patterns + pSeq = Fra_SmlSimulateSeq( p->pManAig, p->pPars->nFramesP, nFrames, nSimWords ); + // go through the implications and check how many of them do not hold + pfFails = ALLOC( char, Vec_IntSize(p->pCla->vImps) ); + memset( pfFails, 0, sizeof(char) * Vec_IntSize(p->pCla->vImps) ); + Vec_IntForEachEntry( p->pCla->vImps, Imp, i ) + { + Left = Fra_ImpLeft(Imp); + Right = Fra_ImpRight(Imp); + pfFails[i] = !Sml_NodeCheckImp( pSeq, Left, Right ); + } + // count how many has failed + Counter = 0; + for ( i = 0; i < Vec_IntSize(p->pCla->vImps); i++ ) + Counter += pfFails[i]; + free( pfFails ); + Fra_SmlStop( pSeq ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Record proven implications in the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ImpRecordInManager( Fra_Man_t * p, Aig_Man_t * pNew ) +{ + Aig_Obj_t * pLeft, * pRight, * pMiter; + int nPosOld, Imp, i; + if ( p->pCla->vImps == NULL || Vec_IntSize(p->pCla->vImps) == 0 ) + return; + // go through the implication + nPosOld = Aig_ManPoNum(pNew); + Vec_IntForEachEntry( p->pCla->vImps, Imp, i ) + { + pLeft = Aig_ManObj( p->pManAig, Fra_ImpLeft(Imp) ); + pRight = Aig_ManObj( p->pManAig, Fra_ImpRight(Imp) ); + // record the implication: L' + R + pMiter = Aig_Or( pNew, + Aig_NotCond(pLeft->pData, !pLeft->fPhase), + Aig_NotCond(pRight->pData, pRight->fPhase) ); + Aig_ObjCreatePo( pNew, pMiter ); + } + pNew->nAsserts = Aig_ManPoNum(pNew) - nPosOld; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraInd.c b/src/aig/fra/fraInd.c new file mode 100644 index 00000000..b41b7a29 --- /dev/null +++ b/src/aig/fra/fraInd.c @@ -0,0 +1,478 @@ +/**CFile**************************************************************** + + FileName [fraInd.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Inductive prover.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraInd.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" +#include "cnf.h" +#include "dar.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs AIG rewriting on the constaint manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_FraigInductionRewrite( Fra_Man_t * p ) +{ + Aig_Man_t * pTemp; + Aig_Obj_t * pObj, * pObjPo; + int nTruePis, k, i, clk = clock(); + // perform AIG rewriting on the speculated frames +// pTemp = Dar_ManRwsat( pTemp, 1, 0 ); + pTemp = Dar_ManRewriteDefault( p->pManFraig ); +// printf( "Before = %6d. After = %6d.\n", Aig_ManNodeNum(p->pManFraig), Aig_ManNodeNum(pTemp) ); +//Aig_ManDumpBlif( p->pManFraig, "1.blif" ); +//Aig_ManDumpBlif( pTemp, "2.blif" ); +// Fra_FramesWriteCone( pTemp ); +// Aig_ManStop( pTemp ); + // transfer PI/register pointers + assert( p->pManFraig->nRegs == pTemp->nRegs ); + assert( p->pManFraig->nAsserts == pTemp->nAsserts ); + nTruePis = Aig_ManPiNum(p->pManAig) - Aig_ManRegNum(p->pManAig); + memset( p->pMemFraig, 0, sizeof(Aig_Obj_t *) * p->nSizeAlloc * p->nFramesAll ); + Fra_ObjSetFraig( Aig_ManConst1(p->pManAig), p->pPars->nFramesK, Aig_ManConst1(pTemp) ); + Aig_ManForEachPiSeq( p->pManAig, pObj, i ) + Fra_ObjSetFraig( pObj, p->pPars->nFramesK, Aig_ManPi(pTemp,nTruePis*p->pPars->nFramesK+i) ); + k = 0; + assert( Aig_ManRegNum(p->pManAig) == Aig_ManPoNum(pTemp) - pTemp->nAsserts ); + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + { + pObjPo = Aig_ManPo(pTemp, pTemp->nAsserts + k++); + Fra_ObjSetFraig( pObj, p->pPars->nFramesK, Aig_ObjChild0(pObjPo) ); + } + // exchange + Aig_ManStop( p->pManFraig ); + p->pManFraig = pTemp; +p->timeRwr += clock() - clk; +} + +/**Function************************************************************* + + Synopsis [Performs speculative reduction for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Fra_FramesConstrainNode( Aig_Man_t * pManFraig, Aig_Obj_t * pObj, int iFrame ) +{ + Aig_Obj_t * pObjNew, * pObjNew2, * pObjRepr, * pObjReprNew, * pMiter; + // skip nodes without representative + if ( (pObjRepr = Fra_ClassObjRepr(pObj)) == NULL ) + return; + assert( pObjRepr->Id < pObj->Id ); + // get the new node + pObjNew = Fra_ObjFraig( pObj, iFrame ); + // get the new node of the representative + pObjReprNew = Fra_ObjFraig( pObjRepr, iFrame ); + // if this is the same node, no need to add constraints + if ( Aig_Regular(pObjNew) == Aig_Regular(pObjReprNew) ) + return; + // these are different nodes - perform speculative reduction + pObjNew2 = Aig_NotCond( pObjReprNew, pObj->fPhase ^ pObjRepr->fPhase ); + // set the new node + Fra_ObjSetFraig( pObj, iFrame, pObjNew2 ); + // add the constraint + pMiter = Aig_Exor( pManFraig, Aig_Regular(pObjNew), Aig_Regular(pObjReprNew) ); + pMiter = Aig_NotCond( pMiter, Aig_Regular(pMiter)->fPhase ^ Aig_IsComplement(pMiter) ); + pMiter = Aig_Not( pMiter ); + Aig_ObjCreatePo( pManFraig, pMiter ); +} + +/**Function************************************************************* + + Synopsis [Prepares the inductive case with speculative reduction.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_FramesWithClasses( Fra_Man_t * p ) +{ + Aig_Man_t * pManFraig; + Aig_Obj_t * pObj, * pObjLi, * pObjLo, * pObjNew; + int i, k, f; + assert( p->pManFraig == NULL ); + assert( Aig_ManRegNum(p->pManAig) > 0 ); + assert( Aig_ManRegNum(p->pManAig) < Aig_ManPiNum(p->pManAig) ); + + // start the fraig package + pManFraig = Aig_ManStart( Aig_ManObjNumMax(p->pManAig) * p->nFramesAll ); + pManFraig->pName = Aig_UtilStrsav( p->pManAig->pName ); + pManFraig->nRegs = p->pManAig->nRegs; + // create PI nodes for the frames + for ( f = 0; f < p->nFramesAll; f++ ) + Fra_ObjSetFraig( Aig_ManConst1(p->pManAig), f, Aig_ManConst1(pManFraig) ); + for ( f = 0; f < p->nFramesAll; f++ ) + Aig_ManForEachPiSeq( p->pManAig, pObj, i ) + Fra_ObjSetFraig( pObj, f, Aig_ObjCreatePi(pManFraig) ); + // create latches for the first frame + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + Fra_ObjSetFraig( pObj, 0, Aig_ObjCreatePi(pManFraig) ); + + // add timeframes +// pManFraig->fAddStrash = 1; + for ( f = 0; f < p->nFramesAll - 1; f++ ) + { + // set the constraints on the latch outputs + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + Fra_FramesConstrainNode( pManFraig, pObj, f ); + // add internal nodes of this frame + Aig_ManForEachNode( p->pManAig, pObj, i ) + { + pObjNew = Aig_And( pManFraig, Fra_ObjChild0Fra(pObj,f), Fra_ObjChild1Fra(pObj,f) ); + Fra_ObjSetFraig( pObj, f, pObjNew ); + Fra_FramesConstrainNode( pManFraig, pObj, f ); + } + // transfer latch input to the latch outputs + Aig_ManForEachLiLoSeq( p->pManAig, pObjLi, pObjLo, k ) + Fra_ObjSetFraig( pObjLo, f+1, Fra_ObjChild0Fra(pObjLi,f) ); + } +// pManFraig->fAddStrash = 0; + // mark the asserts + pManFraig->nAsserts = Aig_ManPoNum(pManFraig); + // add the POs for the latch outputs of the last frame + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + Aig_ObjCreatePo( pManFraig, Fra_ObjFraig(pObj,p->nFramesAll-1) ); + + // remove dangling nodes + Aig_ManCleanup( pManFraig ); + // make sure the satisfying assignment is node assigned + assert( pManFraig->pData == NULL ); + return pManFraig; +} + +/**Function************************************************************* + + Synopsis [Prepares the inductive case with speculative reduction.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_FramesAddMore( Aig_Man_t * p, int nFrames ) +{ + Aig_Obj_t * pObj, ** pLatches; + int i, k, f, nNodesOld; + // set copy pointer of each object to point to itself + Aig_ManForEachObj( p, pObj, i ) + pObj->pData = pObj; + // iterate and add objects + nNodesOld = Aig_ManObjNumMax(p); + pLatches = ALLOC( Aig_Obj_t *, Aig_ManRegNum(p) ); + for ( f = 0; f < nFrames; f++ ) + { + // clean latch inputs and outputs + Aig_ManForEachLiSeq( p, pObj, i ) + pObj->pData = NULL; + Aig_ManForEachLoSeq( p, pObj, i ) + pObj->pData = NULL; + // save the latch input values + k = 0; + Aig_ManForEachLiSeq( p, pObj, i ) + { + if ( Aig_ObjFanin0(pObj)->pData ) + pLatches[k++] = Aig_ObjChild0Copy(pObj); + else + pLatches[k++] = NULL; + } + // insert them as the latch output values + k = 0; + Aig_ManForEachLoSeq( p, pObj, i ) + pObj->pData = pLatches[k++]; + // create the next time frame of nodes + Aig_ManForEachNode( p, pObj, i ) + { + if ( i > nNodesOld ) + break; + if ( Aig_ObjFanin0(pObj)->pData && Aig_ObjFanin1(pObj)->pData ) + pObj->pData = Aig_And( p, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); + else + pObj->pData = NULL; + } + } + free( pLatches ); +} + +/**Function************************************************************* + + Synopsis [Performs choicing of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_FraigInduction( Aig_Man_t * pManAig, int nFramesP, int nFramesK, int nMaxImps, int fRewrite, int fUseImps, int fLatchCorr, int fWriteImps, int fVerbose, int * pnIter ) +{ + int fUseSimpleCnf = 0; + int fUseOldSimulation = 0; + // other paramaters affecting performance + // - presence of FRAIGing in Abc_NtkDarSeqSweep() + // - using distance-1 patterns in Fra_SmlAssignDist1() + // - the number of simulation patterns + // - the number of BMC frames + + Fra_Man_t * p; + Fra_Par_t Pars, * pPars = &Pars; + Aig_Obj_t * pObj; + Cnf_Dat_t * pCnf; + Aig_Man_t * pManAigNew; + int nNodesBeg, nRegsBeg; + int nIter, i, clk = clock(), clk2; + + if ( Aig_ManNodeNum(pManAig) == 0 ) + { + if ( pnIter ) *pnIter = 0; + return Aig_ManDup(pManAig, 1); + } + assert( Aig_ManLatchNum(pManAig) == 0 ); + assert( Aig_ManRegNum(pManAig) > 0 ); + assert( nFramesK > 0 ); +//Aig_ManShow( pManAig, 0, NULL ); + + nNodesBeg = Aig_ManNodeNum(pManAig); + nRegsBeg = Aig_ManRegNum(pManAig); + + // enhance the AIG by adding timeframes +// Fra_FramesAddMore( pManAig, 3 ); + + // get parameters + Fra_ParamsDefaultSeq( pPars ); + pPars->nFramesP = nFramesP; + pPars->nFramesK = nFramesK; + pPars->nMaxImps = nMaxImps; + pPars->fVerbose = fVerbose; + pPars->fRewrite = fRewrite; + pPars->fLatchCorr = fLatchCorr; + pPars->fUseImps = fUseImps; + pPars->fWriteImps = fWriteImps; + + // start the fraig manager for this run + p = Fra_ManStart( pManAig, pPars ); + // derive and refine e-classes using K initialized frames + if ( fUseOldSimulation ) + { + if ( pPars->nFramesP > 0 ) + { + pPars->nFramesP = 0; + printf( "Fra_FraigInduction(): Prefix cannot be used.\n" ); + } + p->pSml = Fra_SmlStart( pManAig, 0, pPars->nFramesK + 1, pPars->nSimWords ); + Fra_SmlSimulate( p, 1 ); + } + else + { + // bug: r iscas/blif/s5378.blif ; st; ssw -v + // bug: r iscas/blif/s1238.blif ; st; ssw -v + // refine the classes with more simulation rounds +if ( fVerbose ) +printf( "Simulating %d AIG nodes for %d cycles ... ", Aig_ManNodeNum(pManAig), pPars->nFramesP + 32 ); + p->pSml = Fra_SmlSimulateSeq( pManAig, pPars->nFramesP, 32, 1 ); //pPars->nFramesK + 1, 1 ); +if ( fVerbose ) +{ +PRT( "Time", clock() - clk ); +} + Fra_ClassesPrepare( p->pCla, p->pPars->fLatchCorr ); +// Fra_ClassesPostprocess( p->pCla ); + // allocate new simulation manager for simulating counter-examples + Fra_SmlStop( p->pSml ); + p->pSml = Fra_SmlStart( pManAig, 0, pPars->nFramesK + 1, pPars->nSimWords ); + } + + // select the most expressive implications + if ( pPars->fUseImps ) + p->pCla->vImps = Fra_ImpDerive( p, 5000000, pPars->nMaxImps, pPars->fLatchCorr ); + + // perform BMC (for the min number of frames) + Fra_BmcPerform( p, pPars->nFramesP, pPars->nFramesK+1 ); // +1 is needed to prevent non-refinement +//Fra_ClassesPrint( p->pCla, 1 ); +// if ( p->vCex == NULL ) +// p->vCex = Vec_IntAlloc( 1000 ); + + p->nLitsBeg = Fra_ClassesCountLits( p->pCla ); + p->nNodesBeg = nNodesBeg; // Aig_ManNodeNum(pManAig); + p->nRegsBeg = nRegsBeg; // Aig_ManRegNum(pManAig); + + // dump AIG of the timeframes +// pManAigNew = Fra_ClassesDeriveAig( p->pCla, pPars->nFramesK ); +// Aig_ManDumpBlif( pManAigNew, "frame_aig.blif" ); +// Fra_ManPartitionTest2( pManAigNew ); +// Aig_ManStop( pManAigNew ); + + // iterate the inductive case + p->pCla->fRefinement = 1; + for ( nIter = 0; p->pCla->fRefinement; nIter++ ) + { + int nLitsOld = Fra_ClassesCountLits(p->pCla); + int nImpsOld = p->pCla->vImps? Vec_IntSize(p->pCla->vImps) : 0; + // mark the classes as non-refined + p->pCla->fRefinement = 0; + // derive non-init K-timeframes while implementing e-classes +clk2 = clock(); + p->pManFraig = Fra_FramesWithClasses( p ); +p->timeTrav += clock() - clk2; +//Aig_ManDumpBlif( p->pManFraig, "testaig.blif" ); + + // perform AIG rewriting + if ( p->pPars->fRewrite ) + Fra_FraigInductionRewrite( p ); + + // convert the manager to SAT solver (the last nLatches outputs are inputs) + if ( fUseSimpleCnf || pPars->fUseImps ) + pCnf = Cnf_DeriveSimple( p->pManFraig, Aig_ManRegNum(p->pManFraig) ); + else + pCnf = Cnf_Derive( p->pManFraig, Aig_ManRegNum(p->pManFraig) ); +//Cnf_DataWriteIntoFile( pCnf, "temp.cnf", 1 ); + + p->pSat = Cnf_DataWriteIntoSolver( pCnf ); + p->nSatVars = pCnf->nVars; + assert( p->pSat != NULL ); + if ( p->pSat == NULL ) + printf( "Fra_FraigInduction(): Computed CNF is not valid.\n" ); + if ( pPars->fUseImps ) + { + Fra_ImpAddToSolver( p, p->pCla->vImps, pCnf->pVarNums ); + if ( p->pSat == NULL ) + printf( "Fra_FraigInduction(): Adding implicationsn to CNF led to a conflict.\n" ); + } + + // set the pointers to the manager + Aig_ManForEachObj( p->pManFraig, pObj, i ) + pObj->pData = p; + + // prepare solver for fraiging the last timeframe + Fra_ManClean( p, Aig_ManObjNumMax(p->pManFraig) + Aig_ManNodeNum(p->pManAig) ); + + // transfer PI/LO variable numbers + Aig_ManForEachObj( p->pManFraig, pObj, i ) + { + if ( pCnf->pVarNums[pObj->Id] == -1 ) + continue; + Fra_ObjSetSatNum( pObj, pCnf->pVarNums[pObj->Id] ); + Fra_ObjSetFaninVec( pObj, (void *)1 ); + } + Cnf_DataFree( pCnf ); + + // report the intermediate results + if ( fVerbose ) + { + printf( "%3d : Const = %6d. Class = %6d. L = %6d. LR = %6d. ", + nIter, Vec_PtrSize(p->pCla->vClasses1), Vec_PtrSize(p->pCla->vClasses), + Fra_ClassesCountLits(p->pCla), p->pManFraig->nAsserts ); + if ( p->pCla->vImps ) + printf( "I = %6d. ", Vec_IntSize(p->pCla->vImps) ); + printf( "NR = %6d.\n", Aig_ManNodeNum(p->pManFraig) ); + } + + // perform sweeping + p->nSatCallsRecent = 0; + p->nSatCallsSkipped = 0; + Fra_FraigSweep( p ); + +// Sat_SolverPrintStats( stdout, p->pSat ); + + // remove FRAIG and SAT solver + Aig_ManStop( p->pManFraig ); p->pManFraig = NULL; + sat_solver_delete( p->pSat ); p->pSat = NULL; + memset( p->pMemFraig, 0, sizeof(Aig_Obj_t *) * p->nSizeAlloc * p->nFramesAll ); +// printf( "Recent SAT called = %d. Skipped = %d.\n", p->nSatCallsRecent, p->nSatCallsSkipped ); + assert( p->vTimeouts == NULL ); + if ( p->vTimeouts ) + printf( "Fra_FraigInduction(): SAT solver timed out!\n" ); + // check if refinement has happened +// p->pCla->fRefinement = (int)(nLitsOld != Fra_ClassesCountLits(p->pCla)); + if ( p->pCla->fRefinement && + nLitsOld == Fra_ClassesCountLits(p->pCla) && + nImpsOld == (p->pCla->vImps? Vec_IntSize(p->pCla->vImps) : 0) ) + { + printf( "Fra_FraigInduction(): Internal error. The result may not verify.\n" ); + break; + } + } +/* + // verify implications using simulation + if ( p->pCla->vImps && Vec_IntSize(p->pCla->vImps) ) + { + int Temp, clk = clock(); + if ( Temp = Fra_ImpVerifyUsingSimulation( p ) ) + printf( "Implications failing the simulation test = %d (out of %d). ", Temp, Vec_IntSize(p->pCla->vImps) ); + else + printf( "All %d implications have passed the simulation test. ", Vec_IntSize(p->pCla->vImps) ); + PRT( "Time", clock() - clk ); + } +*/ + + // move the classes into representatives and reduce AIG +clk2 = clock(); +// Fra_ClassesPrint( p->pCla, 1 ); + Fra_ClassesSelectRepr( p->pCla ); + Fra_ClassesCopyReprs( p->pCla, p->vTimeouts ); + pManAigNew = Aig_ManDupRepr( pManAig, 0 ); + // add implications to the manager + if ( fWriteImps && p->pCla->vImps && Vec_IntSize(p->pCla->vImps) ) + Fra_ImpRecordInManager( p, pManAigNew ); + // cleanup the new manager + Aig_ManSeqCleanup( pManAigNew ); +// Aig_ManCountMergeRegs( pManAigNew ); +p->timeTrav += clock() - clk2; +p->timeTotal = clock() - clk; + // get the final stats + p->nLitsEnd = Fra_ClassesCountLits( p->pCla ); + p->nNodesEnd = Aig_ManNodeNum(pManAigNew); + p->nRegsEnd = Aig_ManRegNum(pManAigNew); + // free the manager + Fra_ManStop( p ); + // check the output +// if ( Aig_ManPoNum(pManAigNew) - Aig_ManRegNum(pManAigNew) == 1 ) +// if ( Aig_ObjChild0( Aig_ManPo(pManAigNew,0) ) == Aig_ManConst0(pManAigNew) ) +// printf( "Proved output constant 0.\n" ); + if ( pnIter ) *pnIter = nIter; + return pManAigNew; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraLcr.c b/src/aig/fra/fraLcr.c new file mode 100644 index 00000000..597dda71 --- /dev/null +++ b/src/aig/fra/fraLcr.c @@ -0,0 +1,654 @@ +/**CFile**************************************************************** + + FileName [fraLcorr.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Latch correspondence computation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraLcorr.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Fra_Lcr_t_ Fra_Lcr_t; +struct Fra_Lcr_t_ +{ + // original AIG + Aig_Man_t * pAig; + // equivalence class representation + Fra_Cla_t * pCla; + // partitioning information + Vec_Ptr_t * vParts; // output partitions + int * pInToOutPart; // mapping of PI num into PO partition num + int * pInToOutNum; // mapping of PI num into the num of this PO in the partition + // AIGs for the partitions + Vec_Ptr_t * vFraigs; + // other variables + int fRefining; + // parameters + int nFramesP; + int fVerbose; + // statistics + int nIters; + int nLitsBeg; + int nLitsEnd; + int nNodesBeg; + int nNodesEnd; + int nRegsBeg; + int nRegsEnd; + // runtime + int timeSim; + int timePart; + int timeTrav; + int timeFraig; + int timeUpdate; + int timeTotal; +}; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates the retiming manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Lcr_t * Lcr_ManAlloc( Aig_Man_t * pAig ) +{ + Fra_Lcr_t * p; + p = ALLOC( Fra_Lcr_t, 1 ); + memset( p, 0, sizeof(Fra_Lcr_t) ); + p->pAig = pAig; + p->pInToOutPart = ALLOC( int, Aig_ManPiNum(pAig) ); + memset( p->pInToOutPart, 0, sizeof(int) * Aig_ManPiNum(pAig) ); + p->pInToOutNum = ALLOC( int, Aig_ManPiNum(pAig) ); + memset( p->pInToOutNum, 0, sizeof(int) * Aig_ManPiNum(pAig) ); + p->vFraigs = Vec_PtrAlloc( 1000 ); + return p; +} + +/**Function************************************************************* + + Synopsis [Prints stats for the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Lcr_ManPrint( Fra_Lcr_t * p ) +{ + printf( "Iterations = %d. LitBeg = %d. LitEnd = %d. (%6.2f %%).\n", + p->nIters, p->nLitsBeg, p->nLitsEnd, 100.0*p->nLitsEnd/p->nLitsBeg ); + printf( "NBeg = %d. NEnd = %d. (Gain = %6.2f %%). RBeg = %d. REnd = %d. (Gain = %6.2f %%).\n", + p->nNodesBeg, p->nNodesEnd, 100.0*(p->nNodesBeg-p->nNodesEnd)/p->nNodesBeg, + p->nRegsBeg, p->nRegsEnd, 100.0*(p->nRegsBeg-p->nRegsEnd)/p->nRegsBeg ); + PRT( "AIG simulation ", p->timeSim ); + PRT( "AIG partitioning", p->timePart ); + PRT( "AIG rebuiding ", p->timeTrav ); + PRT( "FRAIGing ", p->timeFraig ); + PRT( "AIG updating ", p->timeUpdate ); + PRT( "TOTAL RUNTIME ", p->timeTotal ); +} + +/**Function************************************************************* + + Synopsis [Deallocates the retiming manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Lcr_ManFree( Fra_Lcr_t * p ) +{ + Aig_Obj_t * pObj; + int i; + if ( p->fVerbose ) + Lcr_ManPrint( p ); + Aig_ManForEachPi( p->pAig, pObj, i ) + pObj->pNext = NULL; + Vec_PtrFree( p->vFraigs ); + if ( p->pCla ) Fra_ClassesStop( p->pCla ); + if ( p->vParts ) Vec_VecFree( (Vec_Vec_t *)p->vParts ); + free( p->pInToOutPart ); + free( p->pInToOutNum ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Prepare the AIG for class computation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Man_t * Fra_LcrAigPrepare( Aig_Man_t * pAig ) +{ + Fra_Man_t * p; + Aig_Obj_t * pObj; + int i; + p = ALLOC( Fra_Man_t, 1 ); + memset( p, 0, sizeof(Fra_Man_t) ); + Aig_ManForEachPi( pAig, pObj, i ) + pObj->pData = p; + return p; +} + +/**Function************************************************************* + + Synopsis [Prepare the AIG for class computation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_LcrAigPrepareTwo( Aig_Man_t * pAig, Fra_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachPi( pAig, pObj, i ) + pObj->pData = p; +} + +/**Function************************************************************* + + Synopsis [Compares two nodes for equivalence after partitioned fraiging.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_LcrNodesAreEqual( Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 ) +{ + Fra_Man_t * pTemp = pObj0->pData; + Fra_Lcr_t * pLcr = (Fra_Lcr_t *)pTemp->pBmc; + Aig_Man_t * pFraig; + Aig_Obj_t * pOut0, * pOut1; + int nPart0, nPart1; + assert( Aig_ObjIsPi(pObj0) ); + assert( Aig_ObjIsPi(pObj1) ); + // find the partition to which these nodes belong + nPart0 = pLcr->pInToOutPart[(long)pObj0->pNext]; + nPart1 = pLcr->pInToOutPart[(long)pObj1->pNext]; + // if this is the result of refinement of the class created const-1 nodes + // the nodes may end up in different partions - we assume them equivalent + if ( nPart0 != nPart1 ) + { + assert( 0 ); + return 1; + } + assert( nPart0 == nPart1 ); + pFraig = Vec_PtrEntry( pLcr->vFraigs, nPart0 ); + // get the fraig outputs + pOut0 = Aig_ManPo( pFraig, pLcr->pInToOutNum[(long)pObj0->pNext] ); + pOut1 = Aig_ManPo( pFraig, pLcr->pInToOutNum[(long)pObj1->pNext] ); + return Aig_ObjFanin0(pOut0) == Aig_ObjFanin0(pOut1); +} + +/**Function************************************************************* + + Synopsis [Compares the node with a constant after partioned fraiging.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_LcrNodeIsConst( Aig_Obj_t * pObj ) +{ + Fra_Man_t * pTemp = pObj->pData; + Fra_Lcr_t * pLcr = (Fra_Lcr_t *)pTemp->pBmc; + Aig_Man_t * pFraig; + Aig_Obj_t * pOut; + int nPart; + assert( Aig_ObjIsPi(pObj) ); + // find the partition to which these nodes belong + nPart = pLcr->pInToOutPart[(long)pObj->pNext]; + pFraig = Vec_PtrEntry( pLcr->vFraigs, nPart ); + // get the fraig outputs + pOut = Aig_ManPo( pFraig, pLcr->pInToOutNum[(long)pObj->pNext] ); + return Aig_ObjFanin0(pOut) == Aig_ManConst1(pFraig); +} + +/**Function************************************************************* + + Synopsis [Give the AIG and classes, reduces AIG for partitioning.] + + Description [Ignores registers that are not in the classes. + Places candidate equivalent classes of registers into single outputs + (for ease of partitioning). The resulting combinational AIG contains + outputs in the same order as equivalence classes of registers, + followed by constant-1 registers. Preserves the set of all inputs. + Complemented attributes of the outputs do not matter because we need + then only for collecting the structural info.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_LcrDeriveAigForPartitioning( Fra_Lcr_t * pLcr ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj, * pObjPo, * pObjNew, ** ppClass, * pMiter; + int i, c, Offset; + // remember the numbers of the inputs of the original AIG + Aig_ManForEachPi( pLcr->pAig, pObj, i ) + { + pObj->pData = pLcr; + pObj->pNext = (Aig_Obj_t *)(long)i; + } + // compute the LO/LI offset + Offset = Aig_ManPoNum(pLcr->pAig) - Aig_ManPiNum(pLcr->pAig); + // create the PIs + Aig_ManCleanData( pLcr->pAig ); + pNew = Aig_ManStartFrom( pLcr->pAig ); + // go over the equivalence classes + Vec_PtrForEachEntry( pLcr->pCla->vClasses, ppClass, i ) + { + pMiter = Aig_ManConst0(pNew); + for ( c = 0; ppClass[c]; c++ ) + { + assert( Aig_ObjIsPi(ppClass[c]) ); + pObjPo = Aig_ManPo( pLcr->pAig, Offset+(long)ppClass[c]->pNext ); + pObjNew = Aig_ManDup_rec( pNew, pLcr->pAig, Aig_ObjFanin0(pObjPo) ); + pMiter = Aig_Exor( pNew, pMiter, pObjNew ); + } + Aig_ObjCreatePo( pNew, pMiter ); + } + // go over the constant candidates + Vec_PtrForEachEntry( pLcr->pCla->vClasses1, pObj, i ) + { + assert( Aig_ObjIsPi(pObj) ); + pObjPo = Aig_ManPo( pLcr->pAig, Offset+(long)pObj->pNext ); + pMiter = Aig_ManDup_rec( pNew, pLcr->pAig, Aig_ObjFanin0(pObjPo) ); + Aig_ObjCreatePo( pNew, pMiter ); + } + return pNew; +} + +/**Function************************************************************* + + Synopsis [Remaps partitions into the inputs of original AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_LcrRemapPartitions( Vec_Ptr_t * vParts, Fra_Cla_t * pCla, int * pInToOutPart, int * pInToOutNum ) +{ + Vec_Int_t * vOne, * vOneNew; + Aig_Obj_t ** ppClass, * pObjPi; + int Out, Offset, i, k, c; + // compute the LO/LI offset + Offset = Aig_ManPoNum(pCla->pAig) - Aig_ManPiNum(pCla->pAig); + Vec_PtrForEachEntry( vParts, vOne, i ) + { + vOneNew = Vec_IntAlloc( Vec_IntSize(vOne) ); + Vec_IntForEachEntry( vOne, Out, k ) + { + if ( Out < Vec_PtrSize(pCla->vClasses) ) + { + ppClass = Vec_PtrEntry( pCla->vClasses, Out ); + for ( c = 0; ppClass[c]; c++ ) + { + pInToOutPart[(long)ppClass[c]->pNext] = i; + pInToOutNum[(long)ppClass[c]->pNext] = Vec_IntSize(vOneNew); + Vec_IntPush( vOneNew, Offset+(long)ppClass[c]->pNext ); + } + } + else + { + pObjPi = Vec_PtrEntry( pCla->vClasses1, Out - Vec_PtrSize(pCla->vClasses) ); + pInToOutPart[(long)pObjPi->pNext] = i; + pInToOutNum[(long)pObjPi->pNext] = Vec_IntSize(vOneNew); + Vec_IntPush( vOneNew, Offset+(long)pObjPi->pNext ); + } + } + // replace the class + Vec_PtrWriteEntry( vParts, i, vOneNew ); + Vec_IntFree( vOne ); + } +} + +/**Function************************************************************* + + Synopsis [Creates AIG of one partition with speculative reduction.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Fra_LcrCreatePart_rec( Fra_Cla_t * pCla, Aig_Man_t * pNew, Aig_Man_t * p, Aig_Obj_t * pObj ) +{ + assert( !Aig_IsComplement(pObj) ); + if ( Aig_ObjIsTravIdCurrent(p, pObj) ) + return pObj->pData; + Aig_ObjSetTravIdCurrent(p, pObj); + if ( Aig_ObjIsPi(pObj) ) + { +// Aig_Obj_t * pRepr = Fra_ClassObjRepr(pObj); + Aig_Obj_t * pRepr = pCla->pMemRepr[pObj->Id]; + if ( pRepr == NULL ) + pObj->pData = Aig_ObjCreatePi( pNew ); + else + { + pObj->pData = Fra_LcrCreatePart_rec( pCla, pNew, p, pRepr ); + pObj->pData = Aig_NotCond( pObj->pData, pRepr->fPhase ^ pObj->fPhase ); + } + return pObj->pData; + } + Fra_LcrCreatePart_rec( pCla, pNew, p, Aig_ObjFanin0(pObj) ); + Fra_LcrCreatePart_rec( pCla, pNew, p, Aig_ObjFanin1(pObj) ); + return pObj->pData = Aig_And( pNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Creates AIG of one partition with speculative reduction.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_LcrCreatePart( Fra_Lcr_t * p, Vec_Int_t * vPart ) +{ + Aig_Man_t * pNew; + Aig_Obj_t * pObj, * pObjNew; + int Out, i; + // create new AIG for this partition + pNew = Aig_ManStartFrom( p->pAig ); + Aig_ManIncrementTravId( p->pAig ); + Aig_ObjSetTravIdCurrent( p->pAig, Aig_ManConst1(p->pAig) ); + Aig_ManConst1(p->pAig)->pData = Aig_ManConst1(pNew); + Vec_IntForEachEntry( vPart, Out, i ) + { + pObj = Aig_ManPo( p->pAig, Out ); + if ( pObj->fMarkA ) + { + pObjNew = Fra_LcrCreatePart_rec( p->pCla, pNew, p->pAig, Aig_ObjFanin0(pObj) ); + pObjNew = Aig_NotCond( pObjNew, Aig_ObjFaninC0(pObj) ); + } + else + pObjNew = Aig_ManConst1( pNew ); + Aig_ObjCreatePo( pNew, pObjNew ); + } + return pNew; +} + +/**Function************************************************************* + + Synopsis [Marks the nodes belonging to the equivalence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassNodesMark( Fra_Lcr_t * p ) +{ + Aig_Obj_t * pObj, ** ppClass; + int i, c, Offset; + // compute the LO/LI offset + Offset = Aig_ManPoNum(p->pCla->pAig) - Aig_ManPiNum(p->pCla->pAig); + // mark the nodes remaining in the classes + Vec_PtrForEachEntry( p->pCla->vClasses1, pObj, i ) + { + pObj = Aig_ManPo( p->pCla->pAig, Offset+(long)pObj->pNext ); + pObj->fMarkA = 1; + } + Vec_PtrForEachEntry( p->pCla->vClasses, ppClass, i ) + { + for ( c = 0; ppClass[c]; c++ ) + { + pObj = Aig_ManPo( p->pCla->pAig, Offset+(long)ppClass[c]->pNext ); + pObj->fMarkA = 1; + } + } +} + +/**Function************************************************************* + + Synopsis [Unmarks the nodes belonging to the equivalence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ClassNodesUnmark( Fra_Lcr_t * p ) +{ + Aig_Obj_t * pObj, ** ppClass; + int i, c, Offset; + // compute the LO/LI offset + Offset = Aig_ManPoNum(p->pCla->pAig) - Aig_ManPiNum(p->pCla->pAig); + // mark the nodes remaining in the classes + Vec_PtrForEachEntry( p->pCla->vClasses1, pObj, i ) + { + pObj = Aig_ManPo( p->pCla->pAig, Offset+(long)pObj->pNext ); + pObj->fMarkA = 0; + } + Vec_PtrForEachEntry( p->pCla->vClasses, ppClass, i ) + { + for ( c = 0; ppClass[c]; c++ ) + { + pObj = Aig_ManPo( p->pCla->pAig, Offset+(long)ppClass[c]->pNext ); + pObj->fMarkA = 0; + } + } +} + +/**Function************************************************************* + + Synopsis [Performs choicing of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_FraigLatchCorrespondence( Aig_Man_t * pAig, int nFramesP, int nConfMax, int fProve, int fVerbose, int * pnIter ) +{ + int nPartSize = 200; + int fReprSelect = 0; + Fra_Lcr_t * p; + Fra_Sml_t * pSml; + Fra_Man_t * pTemp; + Aig_Man_t * pAigPart, * pAigNew = NULL; + Vec_Int_t * vPart; + int i, nIter, timeSim, clk = clock(), clk2, clk3; + if ( Aig_ManNodeNum(pAig) == 0 ) + { + if ( pnIter ) *pnIter = 0; + return Aig_ManDup(pAig, 1); + } + assert( Aig_ManLatchNum(pAig) == 0 ); + assert( Aig_ManRegNum(pAig) > 0 ); + + // simulate the AIG +clk2 = clock(); +if ( fVerbose ) +printf( "Simulating AIG with %d nodes for %d cycles ... ", Aig_ManNodeNum(pAig), nFramesP + 32 ); + pSml = Fra_SmlSimulateSeq( pAig, nFramesP, 32, 1 ); +if ( fVerbose ) +{ +PRT( "Time", clock() - clk2 ); +} +timeSim = clock() - clk2; + + // check if simulation discovered non-constant-0 POs + if ( fProve && pSml->fNonConstOut ) + { + Fra_SmlStop( pSml ); + return NULL; + } + + // start the manager + p = Lcr_ManAlloc( pAig ); + p->nFramesP = nFramesP; + p->fVerbose = fVerbose; + p->timeSim += timeSim; + + pTemp = Fra_LcrAigPrepare( pAig ); + pTemp->pBmc = (Fra_Bmc_t *)p; + pTemp->pSml = pSml; + + // get preliminary info about equivalence classes + pTemp->pCla = p->pCla = Fra_ClassesStart( p->pAig ); + Fra_ClassesPrepare( p->pCla, 1 ); + p->pCla->pFuncNodeIsConst = Fra_LcrNodeIsConst; + p->pCla->pFuncNodesAreEqual = Fra_LcrNodesAreEqual; + Fra_SmlStop( pTemp->pSml ); + + // partition the AIG for latch correspondence computation +clk2 = clock(); +if ( fVerbose ) +printf( "Partitioning AIG ... " ); + pAigPart = Fra_LcrDeriveAigForPartitioning( p ); + p->vParts = (Vec_Ptr_t *)Aig_ManPartitionSmart( pAigPart, nPartSize, 0, NULL ); + Fra_LcrRemapPartitions( p->vParts, p->pCla, p->pInToOutPart, p->pInToOutNum ); + Aig_ManStop( pAigPart ); +if ( fVerbose ) +{ +PRT( "Time", clock() - clk2 ); +p->timePart += clock() - clk2; +} + + // get the initial stats + p->nLitsBeg = Fra_ClassesCountLits( p->pCla ); + p->nNodesBeg = Aig_ManNodeNum(p->pAig); + p->nRegsBeg = Aig_ManRegNum(p->pAig); + + // perforn interative reduction of the partitions + p->fRefining = 1; + for ( nIter = 0; p->fRefining; nIter++ ) + { + p->fRefining = 0; + clk3 = clock(); + // derive AIGs for each partition + Fra_ClassNodesMark( p ); + Vec_PtrClear( p->vFraigs ); + Vec_PtrForEachEntry( p->vParts, vPart, i ) + { +clk2 = clock(); + pAigPart = Fra_LcrCreatePart( p, vPart ); +p->timeTrav += clock() - clk2; +clk2 = clock(); + pAigNew = Fra_FraigEquivence( pAigPart, nConfMax ); +p->timeFraig += clock() - clk2; + Vec_PtrPush( p->vFraigs, pAigNew ); + Aig_ManStop( pAigPart ); + } + Fra_ClassNodesUnmark( p ); + // report the intermediate results + if ( fVerbose ) + { + printf( "%3d : Const = %6d. Class = %6d. L = %6d. Part = %3d. ", + nIter, Vec_PtrSize(p->pCla->vClasses1), Vec_PtrSize(p->pCla->vClasses), + Fra_ClassesCountLits(p->pCla), Vec_PtrSize(p->vParts) ); + PRT( "T", clock() - clk3 ); + } + // refine the classes + Fra_LcrAigPrepareTwo( p->pAig, pTemp ); + if ( Fra_ClassesRefine( p->pCla ) ) + p->fRefining = 1; + if ( Fra_ClassesRefine1( p->pCla, 0, NULL ) ) + p->fRefining = 1; + // clean the fraigs + Vec_PtrForEachEntry( p->vFraigs, pAigPart, i ) + Aig_ManStop( pAigPart ); + + // repartition if needed + if ( 1 ) + { +clk2 = clock(); + Vec_VecFree( (Vec_Vec_t *)p->vParts ); + pAigPart = Fra_LcrDeriveAigForPartitioning( p ); + p->vParts = (Vec_Ptr_t *)Aig_ManPartitionSmart( pAigPart, nPartSize, 0, NULL ); + Fra_LcrRemapPartitions( p->vParts, p->pCla, p->pInToOutPart, p->pInToOutNum ); + Aig_ManStop( pAigPart ); +p->timePart += clock() - clk2; + } + } + free( pTemp ); + p->nIters = nIter; + + // move the classes into representatives and reduce AIG +clk2 = clock(); +// Fra_ClassesPrint( p->pCla, 1 ); + if ( fReprSelect ) + Fra_ClassesSelectRepr( p->pCla ); + Fra_ClassesCopyReprs( p->pCla, NULL ); + pAigNew = Aig_ManDupRepr( p->pAig, 0 ); + Aig_ManSeqCleanup( pAigNew ); +// Aig_ManCountMergeRegs( pAigNew ); +p->timeUpdate += clock() - clk2; +p->timeTotal = clock() - clk; + // get the final stats + p->nLitsEnd = Fra_ClassesCountLits( p->pCla ); + p->nNodesEnd = Aig_ManNodeNum(pAigNew); + p->nRegsEnd = Aig_ManRegNum(pAigNew); + Lcr_ManFree( p ); + if ( pnIter ) *pnIter = nIter; + return pAigNew; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraMan.c b/src/aig/fra/fraMan.c new file mode 100644 index 00000000..f505b0c2 --- /dev/null +++ b/src/aig/fra/fraMan.c @@ -0,0 +1,304 @@ +/**CFile**************************************************************** + + FileName [fraMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Starts the FRAIG manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraMan.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Sets the default solving parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ParamsDefault( Fra_Par_t * pPars ) +{ + memset( pPars, 0, sizeof(Fra_Par_t) ); + pPars->nSimWords = 32; // the number of words in the simulation info + pPars->dSimSatur = 0.005; // the ratio of refined classes when saturation is reached + pPars->fPatScores = 0; // enables simulation pattern scoring + pPars->MaxScore = 25; // max score after which resimulation is used + pPars->fDoSparse = 1; // skips sparse functions +// pPars->dActConeRatio = 0.05; // the ratio of cone to be bumped +// pPars->dActConeBumpMax = 5.0; // the largest bump of activity + pPars->dActConeRatio = 0.3; // the ratio of cone to be bumped + pPars->dActConeBumpMax = 10.0; // the largest bump of activity + pPars->nBTLimitNode = 100; // conflict limit at a node + pPars->nBTLimitMiter = 500000; // conflict limit at an output + pPars->nFramesK = 0; // the number of timeframes to unroll + pPars->fConeBias = 1; + pPars->fRewrite = 0; +} + +/**Function************************************************************* + + Synopsis [Sets the default solving parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ParamsDefaultSeq( Fra_Par_t * pPars ) +{ + memset( pPars, 0, sizeof(Fra_Par_t) ); + pPars->nSimWords = 1; // the number of words in the simulation info + pPars->dSimSatur = 0.005; // the ratio of refined classes when saturation is reached + pPars->fPatScores = 0; // enables simulation pattern scoring + pPars->MaxScore = 25; // max score after which resimulation is used + pPars->fDoSparse = 1; // skips sparse functions + pPars->dActConeRatio = 0.3; // the ratio of cone to be bumped + pPars->dActConeBumpMax = 10.0; // the largest bump of activity + pPars->nBTLimitNode = 10000000; // conflict limit at a node + pPars->nBTLimitMiter = 500000; // conflict limit at an output + pPars->nFramesK = 1; // the number of timeframes to unroll + pPars->fConeBias = 0; + pPars->fRewrite = 0; + pPars->fLatchCorr = 0; +} + +/**Function************************************************************* + + Synopsis [Starts the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Man_t * Fra_ManStart( Aig_Man_t * pManAig, Fra_Par_t * pPars ) +{ + Fra_Man_t * p; + Aig_Obj_t * pObj; + int i; + // allocate the fraiging manager + p = ALLOC( Fra_Man_t, 1 ); + memset( p, 0, sizeof(Fra_Man_t) ); + p->pPars = pPars; + p->pManAig = pManAig; + p->nSizeAlloc = Aig_ManObjNumMax( pManAig ); + p->nFramesAll = pPars->nFramesK + 1; + // allocate storage for sim pattern + p->nPatWords = Aig_BitWordNum( (Aig_ManPiNum(pManAig) - Aig_ManRegNum(pManAig)) * p->nFramesAll + Aig_ManRegNum(pManAig) ); + p->pPatWords = ALLOC( unsigned, p->nPatWords ); + p->vPiVars = Vec_PtrAlloc( 100 ); + // equivalence classes + p->pCla = Fra_ClassesStart( pManAig ); + // allocate other members + p->pMemFraig = ALLOC( Aig_Obj_t *, p->nSizeAlloc * p->nFramesAll ); + memset( p->pMemFraig, 0, sizeof(Aig_Obj_t *) * p->nSizeAlloc * p->nFramesAll ); + // set random number generator + srand( 0xABCABC ); + // set the pointer to the manager + Aig_ManForEachObj( p->pManAig, pObj, i ) + pObj->pData = p; + return p; +} + +/**Function************************************************************* + + Synopsis [Starts the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManClean( Fra_Man_t * p, int nNodesMax ) +{ + int i; + // remove old arrays + for ( i = 0; i < p->nMemAlloc; i++ ) + if ( p->pMemFanins[i] && p->pMemFanins[i] != (void *)1 ) + Vec_PtrFree( p->pMemFanins[i] ); + // realloc for the new size + if ( p->nMemAlloc < nNodesMax ) + { + int nMemAllocNew = nNodesMax + 5000; + p->pMemFanins = REALLOC( Vec_Ptr_t *, p->pMemFanins, nMemAllocNew ); + p->pMemSatNums = REALLOC( int, p->pMemSatNums, nMemAllocNew ); + p->nMemAlloc = nMemAllocNew; + } + // prepare for the new run + memset( p->pMemFanins, 0, sizeof(Vec_Ptr_t *) * p->nMemAlloc ); + memset( p->pMemSatNums, 0, sizeof(int) * p->nMemAlloc ); +} + +/**Function************************************************************* + + Synopsis [Prepares the new manager to begin fraiging.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Fra_ManPrepareComb( Fra_Man_t * p ) +{ + Aig_Man_t * pManFraig; + Aig_Obj_t * pObj; + int i; + assert( p->pManFraig == NULL ); + // start the fraig package + pManFraig = Aig_ManStart( Aig_ManObjNumMax(p->pManAig) ); + pManFraig->pName = Aig_UtilStrsav( p->pManAig->pName ); + pManFraig->nRegs = p->pManAig->nRegs; + pManFraig->nAsserts = p->pManAig->nAsserts; + // set the pointers to the available fraig nodes + Fra_ObjSetFraig( Aig_ManConst1(p->pManAig), 0, Aig_ManConst1(pManFraig) ); + Aig_ManForEachPi( p->pManAig, pObj, i ) + Fra_ObjSetFraig( pObj, 0, Aig_ObjCreatePi(pManFraig) ); + // set the pointers to the manager + Aig_ManForEachObj( pManFraig, pObj, i ) + pObj->pData = p; + // allocate memory for mapping FRAIG nodes into SAT numbers and fanins + p->nMemAlloc = p->nSizeAlloc; + p->pMemFanins = ALLOC( Vec_Ptr_t *, p->nMemAlloc ); + memset( p->pMemFanins, 0, sizeof(Vec_Ptr_t *) * p->nMemAlloc ); + p->pMemSatNums = ALLOC( int, p->nMemAlloc ); + memset( p->pMemSatNums, 0, sizeof(int) * p->nMemAlloc ); + // make sure the satisfying assignment is node assigned + assert( pManFraig->pData == NULL ); + return pManFraig; +} + +/**Function************************************************************* + + Synopsis [Finalizes the combinational miter after fraiging.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManFinalizeComb( Fra_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + // add the POs + Aig_ManForEachPo( p->pManAig, pObj, i ) + Aig_ObjCreatePo( p->pManFraig, Fra_ObjChild0Fra(pObj,0) ); + // postprocess + Aig_ManCleanMarkB( p->pManFraig ); +} + + +/**Function************************************************************* + + Synopsis [Stops the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManStop( Fra_Man_t * p ) +{ + if ( p->pPars->fVerbose ) + Fra_ManPrint( p ); + // save mapping from original nodes into FRAIG nodes + if ( p->pManAig ) + { + if ( p->pManAig->pObjCopies ) + free( p->pManAig->pObjCopies ); + p->pManAig->pObjCopies = p->pMemFraig; + p->pMemFraig = NULL; + } + Fra_ManClean( p, 0 ); + if ( p->vTimeouts ) Vec_PtrFree( p->vTimeouts ); + if ( p->vPiVars ) Vec_PtrFree( p->vPiVars ); + if ( p->pSat ) sat_solver_delete( p->pSat ); + if ( p->pCla ) Fra_ClassesStop( p->pCla ); + if ( p->pSml ) Fra_SmlStop( p->pSml ); + if ( p->vCex ) Vec_IntFree( p->vCex ); + FREE( p->pMemFraig ); + FREE( p->pMemFanins ); + FREE( p->pMemSatNums ); + FREE( p->pPatWords ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Prints stats for the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManPrint( Fra_Man_t * p ) +{ + double nMemory = 1.0*Aig_ManObjNumMax(p->pManAig)*(p->pSml->nWordsTotal*sizeof(unsigned)+6*sizeof(void*))/(1<<20); + printf( "SimWord = %d. Round = %d. Mem = %0.2f Mb. LitBeg = %d. LitEnd = %d. (%6.2f %%).\n", + p->pPars->nSimWords, p->pSml->nSimRounds, nMemory, p->nLitsBeg, p->nLitsEnd, 100.0*p->nLitsEnd/(p->nLitsBeg?p->nLitsBeg:1) ); + printf( "Proof = %d. Cex = %d. Fail = %d. FailReal = %d. C-lim = %d. ImpRatio = %6.2f %%\n", + p->nSatProof, p->nSatCallsSat, p->nSatFails, p->nSatFailsReal, p->pPars->nBTLimitNode, Fra_ImpComputeStateSpaceRatio(p) ); + printf( "NBeg = %d. NEnd = %d. (Gain = %6.2f %%). RBeg = %d. REnd = %d. (Gain = %6.2f %%).\n", + p->nNodesBeg, p->nNodesEnd, 100.0*(p->nNodesBeg-p->nNodesEnd)/(p->nNodesBeg?p->nNodesBeg:1), + p->nRegsBeg, p->nRegsEnd, 100.0*(p->nRegsBeg-p->nRegsEnd)/(p->nRegsBeg?p->nRegsBeg:1) ); + if ( p->pSat ) Sat_SolverPrintStats( stdout, p->pSat ); + PRT( "AIG simulation ", p->pSml->timeSim ); + PRT( "AIG traversal ", p->timeTrav ); + if ( p->timeRwr ) + { + PRT( "AIG rewriting ", p->timeRwr ); + } + PRT( "SAT solving ", p->timeSat ); + PRT( " Unsat ", p->timeSatUnsat ); + PRT( " Sat ", p->timeSatSat ); + PRT( " Fail ", p->timeSatFail ); + PRT( "Class refining ", p->timeRef ); + PRT( "TOTAL RUNTIME ", p->timeTotal ); + if ( p->time1 ) { PRT( "time1 ", p->time1 ); } + if ( p->nSpeculs ) + printf( "Speculations = %d.\n", p->nSpeculs ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraPart.c b/src/aig/fra/fraPart.c new file mode 100644 index 00000000..f4964746 --- /dev/null +++ b/src/aig/fra/fraPart.c @@ -0,0 +1,263 @@ +/**CFile**************************************************************** + + FileName [fraPart.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Partitioning for induction.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraPart.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManPartitionTest( Aig_Man_t * p, int nComLim ) +{ +// Bar_Progress_t * pProgress; + Vec_Vec_t * vSupps, * vSuppsIn; + Vec_Ptr_t * vSuppsNew; + Vec_Int_t * vSupNew, * vSup, * vSup2, * vTemp;//, * vSupIn; + Vec_Int_t * vOverNew, * vQuantNew; + Aig_Obj_t * pObj; + int i, k, nCommon, CountOver, CountQuant; + int nTotalSupp, nTotalSupp2, Entry, Largest;//, iVar; + double Ratio, R; + int clk; + + nTotalSupp = 0; + nTotalSupp2 = 0; + Ratio = 0.0; + + // compute supports +clk = clock(); + vSupps = (Vec_Vec_t *)Aig_ManSupports( p ); +PRT( "Supports", clock() - clk ); + // remove last entry + Aig_ManForEachPo( p, pObj, i ) + { + vSup = Vec_VecEntry( vSupps, i ); + Vec_IntPop( vSup ); + // remember support +// pObj->pNext = (Aig_Obj_t *)vSup; + } + + // create reverse supports +clk = clock(); + vSuppsIn = Vec_VecStart( Aig_ManPiNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + { + vSup = Vec_VecEntry( vSupps, i ); + Vec_IntForEachEntry( vSup, Entry, k ) + Vec_VecPush( vSuppsIn, Entry, (void *)i ); + } +PRT( "Inverse ", clock() - clk ); + +clk = clock(); + // compute extended supports + Largest = 0; + vSuppsNew = Vec_PtrAlloc( Aig_ManPoNum(p) ); + vOverNew = Vec_IntAlloc( Aig_ManPoNum(p) ); + vQuantNew = Vec_IntAlloc( Aig_ManPoNum(p) ); +// pProgress = Bar_ProgressStart( stdout, Aig_ManPoNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + { +// Bar_ProgressUpdate( pProgress, i, NULL ); + // get old supports + vSup = Vec_VecEntry( vSupps, i ); + if ( Vec_IntSize(vSup) < 2 ) + continue; + // compute new supports + CountOver = CountQuant = 0; + vSupNew = Vec_IntDup( vSup ); + // go through the nodes where the first var appears + Aig_ManForEachPo( p, pObj, k ) +// iVar = Vec_IntEntry( vSup, 0 ); +// vSupIn = Vec_VecEntry( vSuppsIn, iVar ); +// Vec_IntForEachEntry( vSupIn, Entry, k ) + { +// pObj = Aig_ManObj( p, Entry ); + // get support of this output +// vSup2 = (Vec_Int_t *)pObj->pNext; + vSup2 = Vec_VecEntry( vSupps, k ); + // count the number of common vars + nCommon = Vec_IntTwoCountCommon(vSup, vSup2); + if ( nCommon < 2 ) + continue; + if ( nCommon > nComLim ) + { + vSupNew = Vec_IntTwoMerge( vTemp = vSupNew, vSup2 ); + Vec_IntFree( vTemp ); + CountOver++; + } + else + CountQuant++; + } + // save the results + Vec_PtrPush( vSuppsNew, vSupNew ); + Vec_IntPush( vOverNew, CountOver ); + Vec_IntPush( vQuantNew, CountQuant ); + + if ( Largest < Vec_IntSize(vSupNew) ) + Largest = Vec_IntSize(vSupNew); + + nTotalSupp += Vec_IntSize(vSup); + nTotalSupp2 += Vec_IntSize(vSupNew); + if ( Vec_IntSize(vSup) ) + R = Vec_IntSize(vSupNew) / Vec_IntSize(vSup); + else + R = 0; + Ratio += R; + + if ( R < 5.0 ) + continue; + + printf( "%6d : ", i ); + printf( "S = %5d. ", Vec_IntSize(vSup) ); + printf( "SNew = %5d. ", Vec_IntSize(vSupNew) ); + printf( "R = %7.2f. ", R ); + printf( "Over = %5d. ", CountOver ); + printf( "Quant = %5d. ", CountQuant ); + printf( "\n" ); +/* + Vec_IntForEachEntry( vSupNew, Entry, k ) + printf( "%d ", Entry ); + printf( "\n" ); +*/ + } +// Bar_ProgressStop( pProgress ); +PRT( "Scanning", clock() - clk ); + + // print cumulative statistics + printf( "PIs = %6d. POs = %6d. Lim = %3d. AveS = %3d. SN = %3d. R = %4.2f Max = %5d.\n", + Aig_ManPiNum(p), Aig_ManPoNum(p), nComLim, + nTotalSupp/Aig_ManPoNum(p), nTotalSupp2/Aig_ManPoNum(p), + Ratio/Aig_ManPoNum(p), Largest ); + + Vec_VecFree( vSupps ); + Vec_VecFree( vSuppsIn ); + Vec_VecFree( (Vec_Vec_t *)vSuppsNew ); + Vec_IntFree( vOverNew ); + Vec_IntFree( vQuantNew ); +} + + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManPartitionTest2( Aig_Man_t * p ) +{ + Vec_Vec_t * vSupps, * vSuppsIn; + Vec_Int_t * vSup, * vSup2, * vSup3; + Aig_Obj_t * pObj; + int Entry, Entry2, Entry3, Counter; + int i, k, m, n, clk; + char * pSupp; + + // compute supports +clk = clock(); + vSupps = (Vec_Vec_t *)Aig_ManSupports( p ); +PRT( "Supports", clock() - clk ); + // remove last entry + Aig_ManForEachPo( p, pObj, i ) + { + vSup = Vec_VecEntry( vSupps, i ); + Vec_IntPop( vSup ); + // remember support +// pObj->pNext = (Aig_Obj_t *)vSup; + } + + // create reverse supports +clk = clock(); + vSuppsIn = Vec_VecStart( Aig_ManPiNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + { + if ( i == p->nAsserts ) + break; + vSup = Vec_VecEntry( vSupps, i ); + Vec_IntForEachEntry( vSup, Entry, k ) + Vec_VecPush( vSuppsIn, Entry, (void *)i ); + } +PRT( "Inverse ", clock() - clk ); + + // create affective supports +clk = clock(); + pSupp = ALLOC( char, Aig_ManPiNum(p) ); + Aig_ManForEachPo( p, pObj, i ) + { + if ( i % 50 != 0 ) + continue; + vSup = Vec_VecEntry( vSupps, i ); + memset( pSupp, 0, sizeof(char) * Aig_ManPiNum(p) ); + // go through each input of this output + Vec_IntForEachEntry( vSup, Entry, k ) + { + pSupp[Entry] = 1; + vSup2 = Vec_VecEntry( vSuppsIn, Entry ); + // go though each assert of this input + Vec_IntForEachEntry( vSup2, Entry2, m ) + { + vSup3 = Vec_VecEntry( vSupps, Entry2 ); + // go through each input of this assert + Vec_IntForEachEntry( vSup3, Entry3, n ) + { + pSupp[Entry3] = 1; + } + } + } + // count the entries + Counter = 0; + for ( m = 0; m < Aig_ManPiNum(p); m++ ) + Counter += pSupp[m]; + printf( "%d(%d) ", Vec_IntSize(vSup), Counter ); + } + printf( "\n" ); +PRT( "Extension ", clock() - clk ); + + free( pSupp ); + Vec_VecFree( vSupps ); + Vec_VecFree( vSuppsIn ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraSat.c b/src/aig/fra/fraSat.c new file mode 100644 index 00000000..819605d6 --- /dev/null +++ b/src/aig/fra/fraSat.c @@ -0,0 +1,452 @@ +/**CFile**************************************************************** + + FileName [fraSat.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraSat.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include <math.h> +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static int Fra_SetActivityFactors( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Runs equivalence test for the two nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodesAreEquiv( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew ) +{ + int pLits[4], RetValue, RetValue1, nBTLimit, clk;//, clk2 = clock(); + int status; + + // make sure the nodes are not complemented + assert( !Aig_IsComplement(pNew) ); + assert( !Aig_IsComplement(pOld) ); + assert( pNew != pOld ); + + // if at least one of the nodes is a failed node, perform adjustments: + // if the backtrack limit is small, simply skip this node + // if the backtrack limit is > 10, take the quare root of the limit + nBTLimit = p->pPars->nBTLimitNode; + if ( !p->pPars->fSpeculate && p->pPars->nFramesK == 0 && (nBTLimit > 0 && (pOld->fMarkB || pNew->fMarkB)) ) + { + p->nSatFails++; + // fail immediately +// return -1; + if ( nBTLimit <= 10 ) + return -1; + nBTLimit = (int)pow(nBTLimit, 0.7); + } + + p->nSatCalls++; + p->nSatCallsRecent++; + + // make sure the solver is allocated and has enough variables + if ( p->pSat == NULL ) + { + p->pSat = sat_solver_new(); + p->nSatVars = 1; + sat_solver_setnvars( p->pSat, 1000 ); + // var 0 is reserved for const1 node - add the clause + pLits[0] = toLit( 0 ); + sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + } + + // if the nodes do not have SAT variables, allocate them + Fra_CnfNodeAddToSolver( p, pOld, pNew ); + + if ( p->pSat->qtail != p->pSat->qhead ) + { + status = sat_solver_simplify(p->pSat); + assert( status != 0 ); + assert( p->pSat->qtail == p->pSat->qhead ); + } + + // prepare variable activity + if ( p->pPars->fConeBias ) + Fra_SetActivityFactors( p, pOld, pNew ); + + // solve under assumptions + // A = 1; B = 0 OR A = 1; B = 1 +clk = clock(); + pLits[0] = toLitCond( Fra_ObjSatNum(pOld), 0 ); + pLits[1] = toLitCond( Fra_ObjSatNum(pNew), pOld->fPhase == pNew->fPhase ); +//Sat_SolverWriteDimacs( p->pSat, "temp.cnf", pLits, pLits + 2, 1 ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 2, + (sint64)nBTLimit, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + pLits[1] = lit_neg( pLits[1] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + // continue solving the other implication + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + Fra_SmlSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + if ( pOld != p->pManFraig->pConst1 ) + pOld->fMarkB = 1; + pNew->fMarkB = 1; + p->nSatFailsReal++; + return -1; + } + + // if the old node was constant 0, we already know the answer + if ( pOld == p->pManFraig->pConst1 ) + { + p->nSatProof++; + return 1; + } + + // solve under assumptions + // A = 0; B = 1 OR A = 0; B = 0 +clk = clock(); + pLits[0] = toLitCond( Fra_ObjSatNum(pOld), 1 ); + pLits[1] = toLitCond( Fra_ObjSatNum(pNew), pOld->fPhase ^ pNew->fPhase ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 2, + (sint64)nBTLimit, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + pLits[1] = lit_neg( pLits[1] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + Fra_SmlSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + pOld->fMarkB = 1; + pNew->fMarkB = 1; + p->nSatFailsReal++; + return -1; + } +/* + // check BDD proof + { + int RetVal; + PRT( "Sat", clock() - clk2 ); + clk2 = clock(); + RetVal = Fra_NodesAreEquivBdd( pOld, pNew ); +// printf( "%d ", RetVal ); + assert( RetVal ); + PRT( "Bdd", clock() - clk2 ); + printf( "\n" ); + } +*/ + // return SAT proof + p->nSatProof++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Runs the result of test for pObj => pNew.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodesAreImp( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew, int fComplL, int fComplR ) +{ + int pLits[4], RetValue, RetValue1, nBTLimit, clk;//, clk2 = clock(); + int status; + + // make sure the nodes are not complemented + assert( !Aig_IsComplement(pNew) ); + assert( !Aig_IsComplement(pOld) ); + assert( pNew != pOld ); + + // if at least one of the nodes is a failed node, perform adjustments: + // if the backtrack limit is small, simply skip this node + // if the backtrack limit is > 10, take the quare root of the limit + nBTLimit = p->pPars->nBTLimitNode; +/* + if ( !p->pPars->fSpeculate && p->pPars->nFramesK == 0 && (nBTLimit > 0 && (pOld->fMarkB || pNew->fMarkB)) ) + { + p->nSatFails++; + // fail immediately +// return -1; + if ( nBTLimit <= 10 ) + return -1; + nBTLimit = (int)pow(nBTLimit, 0.7); + } +*/ + p->nSatCalls++; + + // make sure the solver is allocated and has enough variables + if ( p->pSat == NULL ) + { + p->pSat = sat_solver_new(); + p->nSatVars = 1; + sat_solver_setnvars( p->pSat, 1000 ); + // var 0 is reserved for const1 node - add the clause + pLits[0] = toLit( 0 ); + sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + } + + // if the nodes do not have SAT variables, allocate them + Fra_CnfNodeAddToSolver( p, pOld, pNew ); + + if ( p->pSat->qtail != p->pSat->qhead ) + { + status = sat_solver_simplify(p->pSat); + assert( status != 0 ); + assert( p->pSat->qtail == p->pSat->qhead ); + } + + // prepare variable activity + if ( p->pPars->fConeBias ) + Fra_SetActivityFactors( p, pOld, pNew ); + + // solve under assumptions + // A = 1; B = 0 OR A = 1; B = 1 +clk = clock(); +// pLits[0] = toLitCond( Fra_ObjSatNum(pOld), 0 ); +// pLits[1] = toLitCond( Fra_ObjSatNum(pNew), pOld->fPhase == pNew->fPhase ); + pLits[0] = toLitCond( Fra_ObjSatNum(pOld), fComplL ); + pLits[1] = toLitCond( Fra_ObjSatNum(pNew), !fComplR ); +//Sat_SolverWriteDimacs( p->pSat, "temp.cnf", pLits, pLits + 2, 1 ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 2, + (sint64)nBTLimit, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + pLits[1] = lit_neg( pLits[1] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + // continue solving the other implication + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + Fra_SmlSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + if ( pOld != p->pManFraig->pConst1 ) + pOld->fMarkB = 1; + pNew->fMarkB = 1; + p->nSatFailsReal++; + return -1; + } + // return SAT proof + p->nSatProof++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Runs equivalence test for one node.] + + Description [Returns the fraiged node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodeIsConst( Fra_Man_t * p, Aig_Obj_t * pNew ) +{ + int pLits[2], RetValue1, RetValue, clk; + + // make sure the nodes are not complemented + assert( !Aig_IsComplement(pNew) ); + assert( pNew != p->pManFraig->pConst1 ); + p->nSatCalls++; + + // make sure the solver is allocated and has enough variables + if ( p->pSat == NULL ) + { + p->pSat = sat_solver_new(); + p->nSatVars = 1; + sat_solver_setnvars( p->pSat, 1000 ); + // var 0 is reserved for const1 node - add the clause + pLits[0] = toLit( 0 ); + sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + } + + // if the nodes do not have SAT variables, allocate them + Fra_CnfNodeAddToSolver( p, NULL, pNew ); + + // prepare variable activity + if ( p->pPars->fConeBias ) + Fra_SetActivityFactors( p, NULL, pNew ); + + // solve under assumptions +clk = clock(); + pLits[0] = toLitCond( Fra_ObjSatNum(pNew), pNew->fPhase ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 1, + (sint64)p->pPars->nBTLimitMiter, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + assert( RetValue ); + // continue solving the other implication + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + if ( p->pPatWords ) + Fra_SmlSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + pNew->fMarkB = 1; + p->nSatFailsReal++; + return -1; + } + + // return SAT proof + p->nSatProof++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Sets variable activities in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SetActivityFactors_rec( Fra_Man_t * p, Aig_Obj_t * pObj, int LevelMin, int LevelMax ) +{ + Vec_Ptr_t * vFanins; + Aig_Obj_t * pFanin; + int i, Counter = 0; + assert( !Aig_IsComplement(pObj) ); + assert( Fra_ObjSatNum(pObj) ); + // skip visited variables + if ( Aig_ObjIsTravIdCurrent(p->pManFraig, pObj) ) + return 0; + Aig_ObjSetTravIdCurrent(p->pManFraig, pObj); + // add the PI to the list + if ( pObj->Level <= (unsigned)LevelMin || Aig_ObjIsPi(pObj) ) + return 0; + // set the factor of this variable + // (LevelMax-LevelMin) / (pObj->Level-LevelMin) = p->pPars->dActConeBumpMax / ThisBump + p->pSat->factors[Fra_ObjSatNum(pObj)] = p->pPars->dActConeBumpMax * (pObj->Level - LevelMin)/(LevelMax - LevelMin); + veci_push(&p->pSat->act_vars, Fra_ObjSatNum(pObj)); + // explore the fanins + vFanins = Fra_ObjFaninVec( pObj ); + Vec_PtrForEachEntry( vFanins, pFanin, i ) + Counter += Fra_SetActivityFactors_rec( p, Aig_Regular(pFanin), LevelMin, LevelMax ); + return 1 + Counter; +} + +/**Function************************************************************* + + Synopsis [Sets variable activities in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SetActivityFactors( Fra_Man_t * p, Aig_Obj_t * pOld, Aig_Obj_t * pNew ) +{ + int clk, LevelMin, LevelMax; + assert( pOld || pNew ); +clk = clock(); + // reset the active variables + veci_resize(&p->pSat->act_vars, 0); + // prepare for traversal + Aig_ManIncrementTravId( p->pManFraig ); + // determine the min and max level to visit + assert( p->pPars->dActConeRatio > 0 && p->pPars->dActConeRatio < 1 ); + LevelMax = AIG_MAX( (pNew ? pNew->Level : 0), (pOld ? pOld->Level : 0) ); + LevelMin = (int)(LevelMax * (1.0 - p->pPars->dActConeRatio)); + // traverse + if ( pOld && !Aig_ObjIsConst1(pOld) ) + Fra_SetActivityFactors_rec( p, pOld, LevelMin, LevelMax ); + if ( pNew && !Aig_ObjIsConst1(pNew) ) + Fra_SetActivityFactors_rec( p, pNew, LevelMin, LevelMax ); +//Fra_PrintActivity( p ); +p->timeTrav += clock() - clk; + return 1; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraSec.c b/src/aig/fra/fraSec.c new file mode 100644 index 00000000..15206a4d --- /dev/null +++ b/src/aig/fra/fraSec.c @@ -0,0 +1,285 @@ +/**CFile**************************************************************** + + FileName [fraSec.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Performs SEC based on seq sweeping.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraSec.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" +#include "ioa.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_FraigSec2( Aig_Man_t * p, int nFramesFix, int fVerbose, int fVeryVerbose ) +{ + Aig_Man_t * pNew; + int nFrames, RetValue, nIter, clk, clkTotal = clock(); + int fLatchCorr = 0; + if ( nFramesFix ) + { + nFrames = nFramesFix; + // perform seq sweeping for one frame number + pNew = Fra_FraigInduction( p, 0, nFrames, 0, 0, 0, fLatchCorr, 0, fVeryVerbose, &nIter ); + } + else + { + // perform seq sweeping while increasing the number of frames + for ( nFrames = 1; ; nFrames++ ) + { +clk = clock(); + pNew = Fra_FraigInduction( p, 0, nFrames, 0, 0, 0, fLatchCorr, 0, fVeryVerbose, &nIter ); + RetValue = Fra_FraigMiterStatus( pNew ); + if ( fVerbose ) + { + printf( "FRAMES %3d : Iters = %3d. ", nFrames, nIter ); + if ( RetValue == 1 ) + printf( "UNSAT " ); + else + printf( "UNDECIDED " ); +PRT( "Time", clock() - clk ); + } + if ( RetValue != -1 ) + break; + Aig_ManStop( pNew ); + } + } + + // get the miter status + RetValue = Fra_FraigMiterStatus( pNew ); + Aig_ManStop( pNew ); + + // report the miter + if ( RetValue == 1 ) + printf( "Networks are equivalent after seq sweeping with K=%d frames (%d iters). ", nFrames, nIter ); + else if ( RetValue == 0 ) + printf( "Networks are NOT EQUIVALENT. " ); + else + printf( "Networks are UNDECIDED after seq sweeping with K=%d frames (%d iters). ", nFrames, nIter ); +PRT( "Time", clock() - clkTotal ); + return RetValue; +} + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_FraigSec( Aig_Man_t * p, int nFramesMax, int fRetimeFirst, int fVerbose, int fVeryVerbose ) +{ + Fra_Sml_t * pSml; + Aig_Man_t * pNew, * pTemp; + int nFrames, RetValue, nIter, clk, clkTotal = clock(); + int fLatchCorr = 0; + + pNew = Aig_ManDup( p, 1 ); + if ( fVerbose ) + { + printf( "Original miter: Latches = %5d. Nodes = %6d.\n", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); + } +//Aig_ManDumpBlif( pNew, "after.blif" ); + + // perform sequential cleanup +clk = clock(); + if ( pNew->nRegs ) + pNew = Aig_ManReduceLaches( pNew, 0 ); + if ( pNew->nRegs ) + pNew = Aig_ManConstReduce( pNew, 0 ); + if ( fVerbose ) + { + printf( "Sequential cleanup: Latches = %5d. Nodes = %6d. ", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + + // perform forward retiming + if ( fRetimeFirst && pNew->nRegs ) + { +clk = clock(); + pNew = Rtm_ManRetime( pTemp = pNew, 1, 1000, 0 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Forward retiming: Latches = %5d. Nodes = %6d. ", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + } + + // run latch correspondence +clk = clock(); + if ( pNew->nRegs ) + { + pNew = Aig_ManDup( pTemp = pNew, 1 ); + Aig_ManStop( pTemp ); + pNew = Fra_FraigLatchCorrespondence( pTemp = pNew, 0, 100000, 1, fVeryVerbose, &nIter ); + Aig_ManStop( pTemp ); + if ( pNew == NULL ) + { + RetValue = 0; + printf( "Networks are NOT EQUIVALENT after simulation. " ); +PRT( "Time", clock() - clkTotal ); + return RetValue; + } + + if ( fVerbose ) + { + printf( "Latch-corr (I=%3d): Latches = %5d. Nodes = %6d. ", + nIter, Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + } + + // perform fraiging +clk = clock(); + pNew = Fra_FraigEquivence( pTemp = pNew, 100 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Fraiging: Latches = %5d. Nodes = %6d. ", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + + // perform seq sweeping while increasing the number of frames + RetValue = Fra_FraigMiterStatus( pNew ); + if ( RetValue == -1 ) + for ( nFrames = 1; nFrames <= nFramesMax; nFrames *= 2 ) + { +clk = clock(); + pNew = Fra_FraigInduction( pTemp = pNew, 0, nFrames, 0, 0, 0, fLatchCorr, 0, fVeryVerbose, &nIter ); + Aig_ManStop( pTemp ); + RetValue = Fra_FraigMiterStatus( pNew ); + if ( fVerbose ) + { + printf( "K-step (K=%2d,I=%3d): Latches = %5d. Nodes = %6d. ", + nFrames, nIter, Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + if ( RetValue != -1 ) + break; + + // perform rewriting +clk = clock(); + pNew = Aig_ManDup( pTemp = pNew, 1 ); + Aig_ManStop( pTemp ); + pNew = Dar_ManRewriteDefault( pTemp = pNew ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Rewriting: Latches = %5d. Nodes = %6d. ", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + + // perform retiming +// if ( fRetimeFirst && pNew->nRegs ) + if ( pNew->nRegs ) + { +clk = clock(); + pNew = Rtm_ManRetime( pTemp = pNew, 1, 1000, 0 ); + Aig_ManStop( pTemp ); + pNew = Aig_ManDup( pTemp = pNew, 1 ); + Aig_ManStop( pTemp ); + if ( fVerbose ) + { + printf( "Forward retiming: Latches = %5d. Nodes = %6d. ", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + } + + if ( pNew->nRegs ) + pNew = Aig_ManConstReduce( pNew, 0 ); + + // perform sequential simulation +clk = clock(); + pSml = Fra_SmlSimulateSeq( pNew, 0, 128 * nFrames, 1 + 16/(1+Aig_ManNodeNum(pNew)/1000) ); + if ( fVerbose ) + { + printf( "Seq simulation : Latches = %5d. Nodes = %6d. ", + Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) ); +PRT( "Time", clock() - clk ); + } + if ( pSml->fNonConstOut ) + { + Fra_SmlStop( pSml ); + Aig_ManStop( pNew ); + RetValue = 0; + printf( "Networks are NOT EQUIVALENT after simulation. " ); +PRT( "Time", clock() - clkTotal ); + return RetValue; + } + Fra_SmlStop( pSml ); + } + + // get the miter status + RetValue = Fra_FraigMiterStatus( pNew ); + + // report the miter + if ( RetValue == 1 ) + { + printf( "Networks are equivalent. " ); +PRT( "Time", clock() - clkTotal ); + } + else if ( RetValue == 0 ) + { + printf( "Networks are NOT EQUIVALENT. " ); +PRT( "Time", clock() - clkTotal ); + } + else + { + static int Counter = 1; + char pFileName[1000]; + printf( "Networks are UNDECIDED. " ); +PRT( "Time", clock() - clkTotal ); + sprintf( pFileName, "sm%03d.aig", Counter++ ); + Ioa_WriteAiger( pNew, pFileName, 0 ); + printf( "The unsolved reduced miter is written into file \"%s\".\n", pFileName ); + } + Aig_ManStop( pNew ); + return RetValue; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraSim.c b/src/aig/fra/fraSim.c new file mode 100644 index 00000000..b77c775a --- /dev/null +++ b/src/aig/fra/fraSim.c @@ -0,0 +1,823 @@ +/**CFile**************************************************************** + + FileName [fraSim.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraSim.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes hash value of the node using its simulation info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlNodeHash( Aig_Obj_t * pObj, int nTableSize ) +{ + Fra_Man_t * p = pObj->pData; + static int s_FPrimes[128] = { + 1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459, + 1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997, + 2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543, + 2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089, + 3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671, + 3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243, + 4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871, + 4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471, + 5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073, + 6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689, + 6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309, + 7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933, + 8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147 + }; + unsigned * pSims; + unsigned uHash; + int i; +// assert( p->pSml->nWordsTotal <= 128 ); + uHash = 0; + pSims = Fra_ObjSim(p->pSml, pObj->Id); + for ( i = p->pSml->nWordsPref; i < p->pSml->nWordsTotal; i++ ) + uHash ^= pSims[i] * s_FPrimes[i & 0x7F]; + return uHash % nTableSize; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation info is composed of all zeros.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlNodeIsConst( Aig_Obj_t * pObj ) +{ + Fra_Man_t * p = pObj->pData; + unsigned * pSims; + int i; + pSims = Fra_ObjSim(p->pSml, pObj->Id); + for ( i = p->pSml->nWordsPref; i < p->pSml->nWordsTotal; i++ ) + if ( pSims[i] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation infos are equal.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlNodesAreEqual( Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 ) +{ + Fra_Man_t * p = pObj0->pData; + unsigned * pSims0, * pSims1; + int i; + pSims0 = Fra_ObjSim(p->pSml, pObj0->Id); + pSims1 = Fra_ObjSim(p->pSml, pObj1->Id); + for ( i = p->pSml->nWordsPref; i < p->pSml->nWordsTotal; i++ ) + if ( pSims0[i] != pSims1[i] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Counts the number of 1s in the XOR of simulation data.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlNodeNotEquWeight( Fra_Sml_t * p, int Left, int Right ) +{ + unsigned * pSimL, * pSimR; + int k, Counter = 0; + pSimL = Fra_ObjSim( p, Left ); + pSimR = Fra_ObjSim( p, Right ); + for ( k = p->nWordsPref; k < p->nWordsTotal; k++ ) + Counter += Aig_WordCountOnes( pSimL[k] ^ pSimR[k] ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation info is composed of all zeros.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlNodeIsZero( Fra_Sml_t * p, Aig_Obj_t * pObj ) +{ + unsigned * pSims; + int i; + pSims = Fra_ObjSim(p, pObj->Id); + for ( i = p->nWordsPref; i < p->nWordsTotal; i++ ) + if ( pSims[i] ) + return 0; + return 1; +} + + + +/**Function************************************************************* + + Synopsis [Generated const 0 pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlSavePattern0( Fra_Man_t * p, int fInit ) +{ + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); +} + +/**Function************************************************************* + + Synopsis [[Generated const 1 pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlSavePattern1( Fra_Man_t * p, int fInit ) +{ + Aig_Obj_t * pObj; + int i, k, nTruePis; + memset( p->pPatWords, 0xff, sizeof(unsigned) * p->nPatWords ); + if ( !fInit ) + return; + // clear the state bits to correspond to all-0 initial state + nTruePis = Aig_ManPiNum(p->pManAig) - Aig_ManRegNum(p->pManAig); + k = 0; + Aig_ManForEachLoSeq( p->pManAig, pObj, i ) + Aig_InfoXorBit( p->pPatWords, nTruePis * p->nFramesAll + k++ ); +} + +/**Function************************************************************* + + Synopsis [Copy pattern from the solver into the internal storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlSavePattern( Fra_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); + Aig_ManForEachPi( p->pManFraig, pObj, i ) + if ( p->pSat->model.ptr[Fra_ObjSatNum(pObj)] == l_True ) + Aig_InfoSetBit( p->pPatWords, i ); + + if ( p->vCex ) + { + Vec_IntClear( p->vCex ); + for ( i = 0; i < Aig_ManPiNum(p->pManAig) - Aig_ManRegNum(p->pManAig); i++ ) + Vec_IntPush( p->vCex, Aig_InfoHasBit( p->pPatWords, i ) ); + for ( i = Aig_ManPiNum(p->pManFraig) - Aig_ManRegNum(p->pManFraig); i < Aig_ManPiNum(p->pManFraig); i++ ) + Vec_IntPush( p->vCex, Aig_InfoHasBit( p->pPatWords, i ) ); + } + +/* + printf( "Pattern: " ); + Aig_ManForEachPi( p->pManFraig, pObj, i ) + printf( "%d", Aig_InfoHasBit( p->pPatWords, i ) ); + printf( "\n" ); +*/ +} + + + +/**Function************************************************************* + + Synopsis [Creates the counter-example from the successful pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlCheckOutputSavePattern( Fra_Man_t * p, Aig_Obj_t * pObj ) +{ + unsigned * pSims; + int i, k, BestPat, * pModel; + // find the word of the pattern + pSims = Fra_ObjSim(p->pSml, pObj->Id); + for ( i = 0; i < p->pSml->nWordsTotal; i++ ) + if ( pSims[i] ) + break; + assert( i < p->pSml->nWordsTotal ); + // find the bit of the pattern + for ( k = 0; k < 32; k++ ) + if ( pSims[i] & (1 << k) ) + break; + assert( k < 32 ); + // determine the best pattern + BestPat = i * 32 + k; + // fill in the counter-example data + pModel = ALLOC( int, Aig_ManPiNum(p->pManFraig) ); + Aig_ManForEachPi( p->pManAig, pObj, i ) + { + pModel[i] = Aig_InfoHasBit(Fra_ObjSim(p->pSml, pObj->Id), BestPat); +// printf( "%d", pModel[i] ); + } +// printf( "\n" ); + // set the model + assert( p->pManFraig->pData == NULL ); + p->pManFraig->pData = pModel; + return; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the one of the output is already non-constant 0.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlCheckOutput( Fra_Man_t * p ) +{ + Aig_Obj_t * pObj; + int i; + // make sure the reference simulation pattern does not detect the bug + pObj = Aig_ManPo( p->pManAig, 0 ); + assert( Aig_ObjFanin0(pObj)->fPhase == (unsigned)Aig_ObjFaninC0(pObj) ); + Aig_ManForEachPo( p->pManAig, pObj, i ) + { + if ( !Fra_SmlNodeIsConst( Aig_ObjFanin0(pObj) ) ) + { + // create the counter-example from this pattern + Fra_SmlCheckOutputSavePattern( p, Aig_ObjFanin0(pObj) ); + return 1; + } + } + return 0; +} + + + +/**Function************************************************************* + + Synopsis [Assigns random patterns to the PI node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlAssignRandom( Fra_Sml_t * p, Aig_Obj_t * pObj ) +{ + unsigned * pSims; + int i; + assert( Aig_ObjIsPi(pObj) ); + pSims = Fra_ObjSim( p, pObj->Id ); + for ( i = 0; i < p->nWordsTotal; i++ ) + pSims[i] = Fra_ObjRandomSim(); +} + +/**Function************************************************************* + + Synopsis [Assigns constant patterns to the PI node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlAssignConst( Fra_Sml_t * p, Aig_Obj_t * pObj, int fConst1, int iFrame ) +{ + unsigned * pSims; + int i; + assert( Aig_ObjIsPi(pObj) ); + pSims = Fra_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame; + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = fConst1? ~(unsigned)0 : 0; +} + +/**Function************************************************************* + + Synopsis [Assings random simulation info for the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlInitialize( Fra_Sml_t * p, int fInit ) +{ + Aig_Obj_t * pObj; + int i; + if ( fInit ) + { + assert( Aig_ManRegNum(p->pAig) > 0 ); + assert( Aig_ManRegNum(p->pAig) < Aig_ManPiNum(p->pAig) ); + // assign random info for primary inputs + Aig_ManForEachPiSeq( p->pAig, pObj, i ) + Fra_SmlAssignRandom( p, pObj ); + // assign the initial state for the latches + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Fra_SmlAssignConst( p, pObj, 0, 0 ); + } + else + { + Aig_ManForEachPi( p->pAig, pObj, i ) + Fra_SmlAssignRandom( p, pObj ); + } +} + +/**Function************************************************************* + + Synopsis [Assings distance-1 simulation info for the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlAssignDist1( Fra_Sml_t * p, unsigned * pPat ) +{ + Aig_Obj_t * pObj; + int f, i, k, Limit, nTruePis; + assert( p->nFrames > 0 ); + if ( p->nFrames == 1 ) + { + // copy the PI info + Aig_ManForEachPi( p->pAig, pObj, i ) + Fra_SmlAssignConst( p, pObj, Aig_InfoHasBit(pPat, i), 0 ); + // flip one bit + Limit = AIG_MIN( Aig_ManPiNum(p->pAig), p->nWordsTotal * 32 - 1 ); + for ( i = 0; i < Limit; i++ ) + Aig_InfoXorBit( Fra_ObjSim( p, Aig_ManPi(p->pAig,i)->Id ), i+1 ); + } + else + { + int fUseDist1 = 0; + + // copy the PI info for each frame + nTruePis = Aig_ManPiNum(p->pAig) - Aig_ManRegNum(p->pAig); + for ( f = 0; f < p->nFrames; f++ ) + Aig_ManForEachPiSeq( p->pAig, pObj, i ) + Fra_SmlAssignConst( p, pObj, Aig_InfoHasBit(pPat, nTruePis * f + i), f ); + // copy the latch info + k = 0; + Aig_ManForEachLoSeq( p->pAig, pObj, i ) + Fra_SmlAssignConst( p, pObj, Aig_InfoHasBit(pPat, nTruePis * p->nFrames + k++), 0 ); +// assert( p->pManFraig == NULL || nTruePis * p->nFrames + k == Aig_ManPiNum(p->pManFraig) ); + + // flip one bit of the last frame + if ( fUseDist1 ) //&& p->nFrames == 2 ) + { + Limit = AIG_MIN( nTruePis, p->nWordsFrame * 32 - 1 ); + for ( i = 0; i < Limit; i++ ) + Aig_InfoXorBit( Fra_ObjSim( p, Aig_ManPi(p->pAig, i)->Id ) + p->nWordsFrame*(p->nFrames-1), i+1 ); + } + } +} + + +/**Function************************************************************* + + Synopsis [Simulates one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlNodeSimulate( Fra_Sml_t * p, Aig_Obj_t * pObj, int iFrame ) +{ + unsigned * pSims, * pSims0, * pSims1; + int fCompl, fCompl0, fCompl1, i; + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsNode(pObj) ); + assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal ); + // get hold of the simulation information + pSims = Fra_ObjSim(p, pObj->Id) + p->nWordsFrame * iFrame; + pSims0 = Fra_ObjSim(p, Aig_ObjFanin0(pObj)->Id) + p->nWordsFrame * iFrame; + pSims1 = Fra_ObjSim(p, Aig_ObjFanin1(pObj)->Id) + p->nWordsFrame * iFrame; + // get complemented attributes of the children using their random info + fCompl = pObj->fPhase; + fCompl0 = Aig_ObjPhaseReal(Aig_ObjChild0(pObj)); + fCompl1 = Aig_ObjPhaseReal(Aig_ObjChild1(pObj)); + // simulate + if ( fCompl0 && fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = (pSims0[i] | pSims1[i]); + else + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = ~(pSims0[i] | pSims1[i]); + } + else if ( fCompl0 && !fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = (pSims0[i] | ~pSims1[i]); + else + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = (~pSims0[i] & pSims1[i]); + } + else if ( !fCompl0 && fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = (~pSims0[i] | pSims1[i]); + else + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = (pSims0[i] & ~pSims1[i]); + } + else // if ( !fCompl0 && !fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = ~(pSims0[i] & pSims1[i]); + else + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = (pSims0[i] & pSims1[i]); + } +} + +/**Function************************************************************* + + Synopsis [Simulates one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlNodeCopyFanin( Fra_Sml_t * p, Aig_Obj_t * pObj, int iFrame ) +{ + unsigned * pSims, * pSims0; + int fCompl, fCompl0, i; + assert( !Aig_IsComplement(pObj) ); + assert( Aig_ObjIsPo(pObj) ); + assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal ); + // get hold of the simulation information + pSims = Fra_ObjSim(p, pObj->Id) + p->nWordsFrame * iFrame; + pSims0 = Fra_ObjSim(p, Aig_ObjFanin0(pObj)->Id) + p->nWordsFrame * iFrame; + // get complemented attributes of the children using their random info + fCompl = pObj->fPhase; + fCompl0 = Aig_ObjPhaseReal(Aig_ObjChild0(pObj)); + // copy information as it is + if ( fCompl0 ) + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = ~pSims0[i]; + else + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims[i] = pSims0[i]; +} + +/**Function************************************************************* + + Synopsis [Simulates one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlNodeTransferNext( Fra_Sml_t * p, Aig_Obj_t * pOut, Aig_Obj_t * pIn, int iFrame ) +{ + unsigned * pSims0, * pSims1; + int i; + assert( !Aig_IsComplement(pOut) ); + assert( !Aig_IsComplement(pIn) ); + assert( Aig_ObjIsPo(pOut) ); + assert( Aig_ObjIsPi(pIn) ); + assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal ); + // get hold of the simulation information + pSims0 = Fra_ObjSim(p, pOut->Id) + p->nWordsFrame * iFrame; + pSims1 = Fra_ObjSim(p, pIn->Id) + p->nWordsFrame * (iFrame+1); + // copy information as it is + for ( i = 0; i < p->nWordsFrame; i++ ) + pSims1[i] = pSims0[i]; +} + + +/**Function************************************************************* + + Synopsis [Check if any of the POs becomes non-constant.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SmlCheckNonConstOutputs( Fra_Sml_t * p ) +{ + Aig_Obj_t * pObj; + int i; + Aig_ManForEachPoSeq( p->pAig, pObj, i ) + if ( !Fra_SmlNodeIsZero(p, pObj) ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Simulates AIG manager.] + + Description [Assumes that the PI simulation info is attached.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlSimulateOne( Fra_Sml_t * p ) +{ + Aig_Obj_t * pObj, * pObjLi, * pObjLo; + int f, i, clk; +clk = clock(); + for ( f = 0; f < p->nFrames; f++ ) + { + // simulate the nodes + Aig_ManForEachNode( p->pAig, pObj, i ) + Fra_SmlNodeSimulate( p, pObj, f ); + // copy simulation info into outputs + Aig_ManForEachPoSeq( p->pAig, pObj, i ) + Fra_SmlNodeCopyFanin( p, pObj, f ); + // quit if this is the last timeframe + if ( f == p->nFrames - 1 ) + break; + // copy simulation info into outputs + Aig_ManForEachLiSeq( p->pAig, pObj, i ) + Fra_SmlNodeCopyFanin( p, pObj, f ); + // copy simulation info into the inputs + Aig_ManForEachLiLoSeq( p->pAig, pObjLi, pObjLo, i ) + Fra_SmlNodeTransferNext( p, pObjLi, pObjLo, f ); + } +p->timeSim += clock() - clk; +p->nSimRounds++; +} + + +/**Function************************************************************* + + Synopsis [Resimulates fraiging manager after finding a counter-example.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlResimulate( Fra_Man_t * p ) +{ + int nChanges, clk; + Fra_SmlAssignDist1( p->pSml, p->pPatWords ); + Fra_SmlSimulateOne( p->pSml ); +// if ( p->pPars->fPatScores ) +// Fra_CleanPatScores( p ); + if ( p->pPars->fProve && Fra_SmlCheckOutput(p) ) + return; +clk = clock(); + nChanges = Fra_ClassesRefine( p->pCla ); + nChanges += Fra_ClassesRefine1( p->pCla, 1, NULL ); + if ( p->pCla->vImps ) + nChanges += Fra_ImpRefineUsingCex( p, p->pCla->vImps ); +p->timeRef += clock() - clk; + if ( !p->pPars->nFramesK && nChanges < 1 ) + printf( "Error: A counter-example did not refine classes!\n" ); +// assert( nChanges >= 1 ); +//printf( "Refined classes = %5d. Changes = %4d.\n", Vec_PtrSize(p->vClasses), nChanges ); +} + +/**Function************************************************************* + + Synopsis [Performs simulation of the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlSimulate( Fra_Man_t * p, int fInit ) +{ + int fVerbose = 0; + int nChanges, nClasses, clk; + assert( !fInit || Aig_ManRegNum(p->pManAig) ); + // start the classes + Fra_SmlInitialize( p->pSml, fInit ); + Fra_SmlSimulateOne( p->pSml ); + Fra_ClassesPrepare( p->pCla, p->pPars->fLatchCorr ); +// Fra_ClassesPrint( p->pCla, 0 ); +if ( fVerbose ) +printf( "Starting classes = %5d. Lits = %6d.\n", Vec_PtrSize(p->pCla->vClasses), Fra_ClassesCountLits(p->pCla) ); + +//return; + + // refine classes by walking 0/1 patterns + Fra_SmlSavePattern0( p, fInit ); + Fra_SmlAssignDist1( p->pSml, p->pPatWords ); + Fra_SmlSimulateOne( p->pSml ); + if ( p->pPars->fProve && Fra_SmlCheckOutput(p) ) + return; +clk = clock(); + nChanges = Fra_ClassesRefine( p->pCla ); + nChanges += Fra_ClassesRefine1( p->pCla, 1, NULL ); +p->timeRef += clock() - clk; +if ( fVerbose ) +printf( "Refined classes = %5d. Changes = %4d. Lits = %6d.\n", Vec_PtrSize(p->pCla->vClasses), nChanges, Fra_ClassesCountLits(p->pCla) ); + Fra_SmlSavePattern1( p, fInit ); + Fra_SmlAssignDist1( p->pSml, p->pPatWords ); + Fra_SmlSimulateOne( p->pSml ); + if ( p->pPars->fProve && Fra_SmlCheckOutput(p) ) + return; +clk = clock(); + nChanges = Fra_ClassesRefine( p->pCla ); + nChanges += Fra_ClassesRefine1( p->pCla, 1, NULL ); +p->timeRef += clock() - clk; + +if ( fVerbose ) +printf( "Refined classes = %5d. Changes = %4d. Lits = %6d.\n", Vec_PtrSize(p->pCla->vClasses), nChanges, Fra_ClassesCountLits(p->pCla) ); + // refine classes by random simulation + do { + Fra_SmlInitialize( p->pSml, fInit ); + Fra_SmlSimulateOne( p->pSml ); + nClasses = Vec_PtrSize(p->pCla->vClasses); + if ( p->pPars->fProve && Fra_SmlCheckOutput(p) ) + return; +clk = clock(); + nChanges = Fra_ClassesRefine( p->pCla ); + nChanges += Fra_ClassesRefine1( p->pCla, 1, NULL ); +p->timeRef += clock() - clk; +if ( fVerbose ) +printf( "Refined classes = %5d. Changes = %4d. Lits = %6d.\n", Vec_PtrSize(p->pCla->vClasses), nChanges, Fra_ClassesCountLits(p->pCla) ); + } while ( (double)nChanges / nClasses > p->pPars->dSimSatur ); + +// if ( p->pPars->fVerbose ) +// printf( "Consts = %6d. Classes = %6d. Literals = %6d.\n", +// Vec_PtrSize(p->pCla->vClasses1), Vec_PtrSize(p->pCla->vClasses), Fra_ClassesCountLits(p->pCla) ); +// Fra_ClassesPrint( p->pCla, 0 ); +} + + +/**Function************************************************************* + + Synopsis [Allocates simulation manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Sml_t * Fra_SmlStart( Aig_Man_t * pAig, int nPref, int nFrames, int nWordsFrame ) +{ + Fra_Sml_t * p; + p = (Fra_Sml_t *)malloc( sizeof(Fra_Sml_t) + sizeof(unsigned) * Aig_ManObjNumMax(pAig) * (nPref + nFrames) * nWordsFrame ); + memset( p, 0, sizeof(Fra_Sml_t) + sizeof(unsigned) * (nPref + nFrames) * nWordsFrame ); + p->pAig = pAig; + p->nPref = nPref; + p->nFrames = nPref + nFrames; + p->nWordsFrame = nWordsFrame; + p->nWordsTotal = (nPref + nFrames) * nWordsFrame; + p->nWordsPref = nPref * nWordsFrame; + return p; +} + +/**Function************************************************************* + + Synopsis [Deallocates simulation manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SmlStop( Fra_Sml_t * p ) +{ + free( p ); +} + + +/**Function************************************************************* + + Synopsis [Performs simulation of the uninitialized circuit.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Sml_t * Fra_SmlSimulateComb( Aig_Man_t * pAig, int nWords ) +{ + Fra_Sml_t * p; + p = Fra_SmlStart( pAig, 0, 1, nWords ); + Fra_SmlInitialize( p, 0 ); + Fra_SmlSimulateOne( p ); + return p; +} + +/**Function************************************************************* + + Synopsis [Performs simulation of the initialized circuit.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Sml_t * Fra_SmlSimulateSeq( Aig_Man_t * pAig, int nPref, int nFrames, int nWords ) +{ + Fra_Sml_t * p; + p = Fra_SmlStart( pAig, nPref, nFrames, nWords ); + Fra_SmlInitialize( p, 1 ); + Fra_SmlSimulateOne( p ); + p->fNonConstOut = Fra_SmlCheckNonConstOutputs( p ); + return p; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fra_.c b/src/aig/fra/fra_.c new file mode 100644 index 00000000..2b601587 --- /dev/null +++ b/src/aig/fra/fra_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [fra_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fra_.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/module.make b/src/aig/fra/module.make new file mode 100644 index 00000000..e7264fdc --- /dev/null +++ b/src/aig/fra/module.make @@ -0,0 +1,12 @@ +SRC += src/aig/fra/fraBmc.c \ + src/aig/fra/fraCec.c \ + src/aig/fra/fraClass.c \ + src/aig/fra/fraCnf.c \ + src/aig/fra/fraCore.c \ + src/aig/fra/fraImp.c \ + src/aig/fra/fraInd.c \ + src/aig/fra/fraLcr.c \ + src/aig/fra/fraMan.c \ + src/aig/fra/fraSat.c \ + src/aig/fra/fraSec.c \ + src/aig/fra/fraSim.c diff --git a/src/aig/hop/cudd2.c b/src/aig/hop/cudd2.c new file mode 100644 index 00000000..28d13ce0 --- /dev/null +++ b/src/aig/hop/cudd2.c @@ -0,0 +1,355 @@ +/**CFile**************************************************************** + + FileName [cudd2.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [Recording AIGs for the BDD operations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - October 3, 2006.] + + Revision [$Id: cudd2.c,v 1.00 2006/10/03 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" +#include "st.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Aig_CuddMan_t_ Aig_CuddMan_t; +struct Aig_CuddMan_t_ +{ + Aig_Man_t * pAig; // internal AIG package + st_table * pTable; // hash table mapping BDD nodes into AIG nodes +}; + +// static Cudd AIG manager used in this experiment +static Aig_CuddMan_t * s_pCuddMan = NULL; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Start AIG recording.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_Init( unsigned int numVars, unsigned int numVarsZ, unsigned int numSlots, unsigned int cacheSize, unsigned long maxMemory, void * pCudd ) +{ + int v; + // start the BDD-to-AIG manager when the first BDD manager is allocated + if ( s_pCuddMan != NULL ) + return; + s_pCuddMan = ALLOC( Aig_CuddMan_t, 1 ); + s_pCuddMan->pAig = Aig_ManStart(); + s_pCuddMan->pTable = st_init_table( st_ptrcmp, st_ptrhash ); + for ( v = 0; v < (int)numVars; v++ ) + Aig_ObjCreatePi( s_pCuddMan->pAig ); +} + +/**Function************************************************************* + + Synopsis [Stops AIG recording.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_Quit( void * pCudd ) +{ + assert( s_pCuddMan != NULL ); + Aig_ManDumpBlif( s_pCuddMan->pAig, "aig_temp.blif" ); + Aig_ManStop( s_pCuddMan->pAig ); + st_free_table( s_pCuddMan->pTable ); + free( s_pCuddMan ); + s_pCuddMan = NULL; +} + +/**Function************************************************************* + + Synopsis [Fetches AIG node corresponding to the BDD node from the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static Aig_Obj_t * Cudd2_GetArg( void * pArg ) +{ + Aig_Obj_t * pNode; + assert( s_pCuddMan != NULL ); + if ( !st_lookup( s_pCuddMan->pTable, (char *)Aig_Regular(pArg), (char **)&pNode ) ) + { + printf( "Cudd2_GetArg(): An argument BDD is not in the hash table.\n" ); + return NULL; + } + return Aig_NotCond( pNode, Aig_IsComplement(pArg) ); +} + +/**Function************************************************************* + + Synopsis [Inserts the AIG node corresponding to the BDD node into the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static void Cudd2_SetArg( Aig_Obj_t * pNode, void * pResult ) +{ + assert( s_pCuddMan != NULL ); + if ( st_is_member( s_pCuddMan->pTable, (char *)Aig_Regular(pResult) ) ) + return; + pNode = Aig_NotCond( pNode, Aig_IsComplement(pResult) ); + st_insert( s_pCuddMan->pTable, (char *)Aig_Regular(pResult), (char *)pNode ); +} + +/**Function************************************************************* + + Synopsis [Registers constant 1 node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddOne( void * pCudd, void * pResult ) +{ + Cudd2_SetArg( Aig_ManConst1(s_pCuddMan->pAig), pResult ); +} + +/**Function************************************************************* + + Synopsis [Adds elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddIthVar( void * pCudd, int iVar, void * pResult ) +{ + int v; + assert( s_pCuddMan != NULL ); + for ( v = Aig_ManPiNum(s_pCuddMan->pAig); v <= iVar; v++ ) + Aig_ObjCreatePi( s_pCuddMan->pAig ); + Cudd2_SetArg( Aig_ManPi(s_pCuddMan->pAig, iVar), pResult ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddAnd( void * pCudd, void * pArg0, void * pArg1, void * pResult ) +{ + Aig_Obj_t * pNode0, * pNode1, * pNode; + pNode0 = Cudd2_GetArg( pArg0 ); + pNode1 = Cudd2_GetArg( pArg1 ); + pNode = Aig_And( s_pCuddMan->pAig, pNode0, pNode1 ); + Cudd2_SetArg( pNode, pResult ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddOr( void * pCudd, void * pArg0, void * pArg1, void * pResult ) +{ + Cudd2_bddAnd( pCudd, Aig_Not(pArg0), Aig_Not(pArg1), Aig_Not(pResult) ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddNand( void * pCudd, void * pArg0, void * pArg1, void * pResult ) +{ + Cudd2_bddAnd( pCudd, pArg0, pArg1, Aig_Not(pResult) ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddNor( void * pCudd, void * pArg0, void * pArg1, void * pResult ) +{ + Cudd2_bddAnd( pCudd, Aig_Not(pArg0), Aig_Not(pArg1), pResult ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddXor( void * pCudd, void * pArg0, void * pArg1, void * pResult ) +{ + Aig_Obj_t * pNode0, * pNode1, * pNode; + pNode0 = Cudd2_GetArg( pArg0 ); + pNode1 = Cudd2_GetArg( pArg1 ); + pNode = Aig_Exor( s_pCuddMan->pAig, pNode0, pNode1 ); + Cudd2_SetArg( pNode, pResult ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddXnor( void * pCudd, void * pArg0, void * pArg1, void * pResult ) +{ + Cudd2_bddXor( pCudd, pArg0, pArg1, Aig_Not(pResult) ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddIte( void * pCudd, void * pArg0, void * pArg1, void * pArg2, void * pResult ) +{ + Aig_Obj_t * pNode0, * pNode1, * pNode2, * pNode; + pNode0 = Cudd2_GetArg( pArg0 ); + pNode1 = Cudd2_GetArg( pArg1 ); + pNode2 = Cudd2_GetArg( pArg2 ); + pNode = Aig_Mux( s_pCuddMan->pAig, pNode0, pNode1, pNode2 ); + Cudd2_SetArg( pNode, pResult ); +} + +/**Function************************************************************* + + Synopsis [Performs BDD operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddCompose( void * pCudd, void * pArg0, void * pArg1, int v, void * pResult ) +{ + Aig_Obj_t * pNode0, * pNode1, * pNode; + pNode0 = Cudd2_GetArg( pArg0 ); + pNode1 = Cudd2_GetArg( pArg1 ); + pNode = Aig_Compose( s_pCuddMan->pAig, pNode0, pNode1, v ); + Cudd2_SetArg( pNode, pResult ); +} + +/**Function************************************************************* + + Synopsis [Should be called after each containment check.] + + Description [Result should be 1 if Cudd2_bddLeq returned 1.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddLeq( void * pCudd, void * pArg0, void * pArg1, int Result ) +{ + Aig_Obj_t * pNode0, * pNode1, * pNode; + pNode0 = Cudd2_GetArg( pArg0 ); + pNode1 = Cudd2_GetArg( pArg1 ); + pNode = Aig_And( s_pCuddMan->pAig, pNode0, Aig_Not(pNode1) ); + Aig_ObjCreatePo( s_pCuddMan->pAig, pNode ); +} + +/**Function************************************************************* + + Synopsis [Should be called after each equality check.] + + Description [Result should be 1 if they are equal.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cudd2_bddEqual( void * pCudd, void * pArg0, void * pArg1, int Result ) +{ + Aig_Obj_t * pNode0, * pNode1, * pNode; + pNode0 = Cudd2_GetArg( pArg0 ); + pNode1 = Cudd2_GetArg( pArg1 ); + pNode = Aig_Exor( s_pCuddMan->pAig, pNode0, pNode1 ); + Aig_ObjCreatePo( s_pCuddMan->pAig, pNode ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/cudd2.h b/src/aig/hop/cudd2.h new file mode 100644 index 00000000..69711c11 --- /dev/null +++ b/src/aig/hop/cudd2.h @@ -0,0 +1,82 @@ +/**CFile**************************************************************** + + FileName [cudd2.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - October 3, 2006.] + + Revision [$Id: cudd2.h,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __CUDD2_H__ +#define __CUDD2_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +// HA: Added for printing messages +#ifndef MSG +#define MSG(msg) (printf("%s = \n",(msg))); +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +extern void Cudd2_Init ( unsigned int numVars, unsigned int numVarsZ, unsigned int numSlots, unsigned int cacheSize, unsigned long maxMemory, void * pCudd ); +extern void Cudd2_Quit ( void * pCudd ); +extern void Cudd2_bddOne ( void * pCudd, void * pResult ); +extern void Cudd2_bddIthVar ( void * pCudd, int iVar, void * pResult ); +extern void Cudd2_bddAnd ( void * pCudd, void * pArg0, void * pArg1, void * pResult ); +extern void Cudd2_bddOr ( void * pCudd, void * pArg0, void * pArg1, void * pResult ); +extern void Cudd2_bddNand ( void * pCudd, void * pArg0, void * pArg1, void * pResult ); +extern void Cudd2_bddNor ( void * pCudd, void * pArg0, void * pArg1, void * pResult ); +extern void Cudd2_bddXor ( void * pCudd, void * pArg0, void * pArg1, void * pResult ); +extern void Cudd2_bddXnor ( void * pCudd, void * pArg0, void * pArg1, void * pResult ); +extern void Cudd2_bddIte ( void * pCudd, void * pArg0, void * pArg1, void * pArg2, void * pResult ); +extern void Cudd2_bddCompose( void * pCudd, void * pArg0, void * pArg1, int v, void * pResult ); +extern void Cudd2_bddLeq ( void * pCudd, void * pArg0, void * pArg1, int Result ); +extern void Cudd2_bddEqual ( void * pCudd, void * pArg0, void * pArg1, int Result ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/hop/hop.h b/src/aig/hop/hop.h new file mode 100644 index 00000000..af1d9cd3 --- /dev/null +++ b/src/aig/hop/hop.h @@ -0,0 +1,347 @@ +/**CFile**************************************************************** + + FileName [hop.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hop.h,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __HOP_H__ +#define __HOP_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +#include "vec.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Hop_Man_t_ Hop_Man_t; +typedef struct Hop_Obj_t_ Hop_Obj_t; +typedef int Hop_Edge_t; + +// object types +typedef enum { + AIG_NONE, // 0: non-existent object + AIG_CONST1, // 1: constant 1 + AIG_PI, // 2: primary input + AIG_PO, // 3: primary output + AIG_AND, // 4: AND node + AIG_EXOR, // 5: EXOR node + AIG_VOID // 6: unused object +} Hop_Type_t; + +// the AIG node +struct Hop_Obj_t_ // 6 words +{ + void * pData; // misc + Hop_Obj_t * pNext; // strashing table + Hop_Obj_t * pFanin0; // fanin + Hop_Obj_t * pFanin1; // fanin + unsigned int Type : 3; // object type + unsigned int fPhase : 1; // value under 000...0 pattern + unsigned int fMarkA : 1; // multipurpose mask + unsigned int fMarkB : 1; // multipurpose mask + unsigned int nRefs : 26; // reference count (level) + int Id; // unique ID of the node +}; + +// the AIG manager +struct Hop_Man_t_ +{ + // AIG nodes + Vec_Ptr_t * vPis; // the array of PIs + Vec_Ptr_t * vPos; // the array of POs + Vec_Ptr_t * vObjs; // the array of all nodes (optional) + Hop_Obj_t * pConst1; // the constant 1 node + Hop_Obj_t Ghost; // the ghost node + // AIG node counters + int nObjs[AIG_VOID];// the number of objects by type + int nCreated; // the number of created objects + int nDeleted; // the number of deleted objects + // stuctural hash table + Hop_Obj_t ** pTable; // structural hash table + int nTableSize; // structural hash table size + // various data members + void * pData; // the temporary data + int nTravIds; // the current traversal ID + int fRefCount; // enables reference counting + int fCatchExor; // enables EXOR nodes + // memory management + Vec_Ptr_t * vChunks; // allocated memory pieces + Vec_Ptr_t * vPages; // memory pages used by nodes + Hop_Obj_t * pListFree; // the list of free nodes + // timing statistics + int time1; + int time2; +}; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +#define AIG_MIN(a,b) (((a) < (b))? (a) : (b)) +#define AIG_MAX(a,b) (((a) > (b))? (a) : (b)) + +#ifndef PRT +#define PRT(a,t) printf("%s = ", (a)); printf("%6.2f sec\n", (float)(t)/(float)(CLOCKS_PER_SEC)) +#endif + +static inline int Hop_BitWordNum( int nBits ) { return (nBits>>5) + ((nBits&31) > 0); } +static inline int Hop_TruthWordNum( int nVars ) { return nVars <= 5 ? 1 : (1 << (nVars - 5)); } +static inline int Hop_InfoHasBit( unsigned * p, int i ) { return (p[(i)>>5] & (1<<((i) & 31))) > 0; } +static inline void Hop_InfoSetBit( unsigned * p, int i ) { p[(i)>>5] |= (1<<((i) & 31)); } +static inline void Hop_InfoXorBit( unsigned * p, int i ) { p[(i)>>5] ^= (1<<((i) & 31)); } +static inline int Hop_Base2Log( unsigned n ) { int r; assert( n >= 0 ); if ( n < 2 ) return n; for ( r = 0, n--; n; n >>= 1, r++ ); return r; } +static inline int Hop_Base10Log( unsigned n ) { int r; assert( n >= 0 ); if ( n < 2 ) return n; for ( r = 0, n--; n; n /= 10, r++ ); return r; } + +static inline Hop_Obj_t * Hop_Regular( Hop_Obj_t * p ) { return (Hop_Obj_t *)((unsigned long)(p) & ~01); } +static inline Hop_Obj_t * Hop_Not( Hop_Obj_t * p ) { return (Hop_Obj_t *)((unsigned long)(p) ^ 01); } +static inline Hop_Obj_t * Hop_NotCond( Hop_Obj_t * p, int c ) { return (Hop_Obj_t *)((unsigned long)(p) ^ (c)); } +static inline int Hop_IsComplement( Hop_Obj_t * p ) { return (int)((unsigned long)(p) & 01); } + +static inline Hop_Obj_t * Hop_ManConst0( Hop_Man_t * p ) { return Hop_Not(p->pConst1); } +static inline Hop_Obj_t * Hop_ManConst1( Hop_Man_t * p ) { return p->pConst1; } +static inline Hop_Obj_t * Hop_ManGhost( Hop_Man_t * p ) { return &p->Ghost; } +static inline Hop_Obj_t * Hop_ManPi( Hop_Man_t * p, int i ) { return (Hop_Obj_t *)Vec_PtrEntry(p->vPis, i); } +static inline Hop_Obj_t * Hop_ManPo( Hop_Man_t * p, int i ) { return (Hop_Obj_t *)Vec_PtrEntry(p->vPos, i); } +static inline Hop_Obj_t * Hop_ManObj( Hop_Man_t * p, int i ) { return p->vObjs ? (Hop_Obj_t *)Vec_PtrEntry(p->vObjs, i) : NULL; } + +static inline Hop_Edge_t Hop_EdgeCreate( int Id, int fCompl ) { return (Id << 1) | fCompl; } +static inline int Hop_EdgeId( Hop_Edge_t Edge ) { return Edge >> 1; } +static inline int Hop_EdgeIsComplement( Hop_Edge_t Edge ) { return Edge & 1; } +static inline Hop_Edge_t Hop_EdgeRegular( Hop_Edge_t Edge ) { return (Edge >> 1) << 1; } +static inline Hop_Edge_t Hop_EdgeNot( Hop_Edge_t Edge ) { return Edge ^ 1; } +static inline Hop_Edge_t Hop_EdgeNotCond( Hop_Edge_t Edge, int fCond ) { return Edge ^ fCond; } + +static inline int Hop_ManPiNum( Hop_Man_t * p ) { return p->nObjs[AIG_PI]; } +static inline int Hop_ManPoNum( Hop_Man_t * p ) { return p->nObjs[AIG_PO]; } +static inline int Hop_ManAndNum( Hop_Man_t * p ) { return p->nObjs[AIG_AND]; } +static inline int Hop_ManExorNum( Hop_Man_t * p ) { return p->nObjs[AIG_EXOR]; } +static inline int Hop_ManNodeNum( Hop_Man_t * p ) { return p->nObjs[AIG_AND]+p->nObjs[AIG_EXOR];} +static inline int Hop_ManGetCost( Hop_Man_t * p ) { return p->nObjs[AIG_AND]+3*p->nObjs[AIG_EXOR]; } +static inline int Hop_ManObjNum( Hop_Man_t * p ) { return p->nCreated - p->nDeleted; } + +static inline Hop_Type_t Hop_ObjType( Hop_Obj_t * pObj ) { return (Hop_Type_t)pObj->Type; } +static inline int Hop_ObjIsNone( Hop_Obj_t * pObj ) { return pObj->Type == AIG_NONE; } +static inline int Hop_ObjIsConst1( Hop_Obj_t * pObj ) { assert(!Hop_IsComplement(pObj)); return pObj->Type == AIG_CONST1; } +static inline int Hop_ObjIsPi( Hop_Obj_t * pObj ) { return pObj->Type == AIG_PI; } +static inline int Hop_ObjIsPo( Hop_Obj_t * pObj ) { return pObj->Type == AIG_PO; } +static inline int Hop_ObjIsAnd( Hop_Obj_t * pObj ) { return pObj->Type == AIG_AND; } +static inline int Hop_ObjIsExor( Hop_Obj_t * pObj ) { return pObj->Type == AIG_EXOR; } +static inline int Hop_ObjIsNode( Hop_Obj_t * pObj ) { return pObj->Type == AIG_AND || pObj->Type == AIG_EXOR; } +static inline int Hop_ObjIsTerm( Hop_Obj_t * pObj ) { return pObj->Type == AIG_PI || pObj->Type == AIG_PO || pObj->Type == AIG_CONST1; } +static inline int Hop_ObjIsHash( Hop_Obj_t * pObj ) { return pObj->Type == AIG_AND || pObj->Type == AIG_EXOR; } + +static inline int Hop_ObjIsMarkA( Hop_Obj_t * pObj ) { return pObj->fMarkA; } +static inline void Hop_ObjSetMarkA( Hop_Obj_t * pObj ) { pObj->fMarkA = 1; } +static inline void Hop_ObjClearMarkA( Hop_Obj_t * pObj ) { pObj->fMarkA = 0; } + +static inline void Hop_ObjSetTravId( Hop_Obj_t * pObj, int TravId ) { pObj->pData = (void *)TravId; } +static inline void Hop_ObjSetTravIdCurrent( Hop_Man_t * p, Hop_Obj_t * pObj ) { pObj->pData = (void *)p->nTravIds; } +static inline void Hop_ObjSetTravIdPrevious( Hop_Man_t * p, Hop_Obj_t * pObj ) { pObj->pData = (void *)(p->nTravIds - 1); } +static inline int Hop_ObjIsTravIdCurrent( Hop_Man_t * p, Hop_Obj_t * pObj ) { return (int )((int)pObj->pData == p->nTravIds); } +static inline int Hop_ObjIsTravIdPrevious( Hop_Man_t * p, Hop_Obj_t * pObj ) { return (int )((int)pObj->pData == p->nTravIds - 1); } + +static inline int Hop_ObjTravId( Hop_Obj_t * pObj ) { return (int)pObj->pData; } +static inline int Hop_ObjPhase( Hop_Obj_t * pObj ) { return pObj->fPhase; } +static inline int Hop_ObjRefs( Hop_Obj_t * pObj ) { return pObj->nRefs; } +static inline void Hop_ObjRef( Hop_Obj_t * pObj ) { pObj->nRefs++; } +static inline void Hop_ObjDeref( Hop_Obj_t * pObj ) { assert( pObj->nRefs > 0 ); pObj->nRefs--; } +static inline void Hop_ObjClearRef( Hop_Obj_t * pObj ) { pObj->nRefs = 0; } +static inline int Hop_ObjFaninC0( Hop_Obj_t * pObj ) { return Hop_IsComplement(pObj->pFanin0); } +static inline int Hop_ObjFaninC1( Hop_Obj_t * pObj ) { return Hop_IsComplement(pObj->pFanin1); } +static inline Hop_Obj_t * Hop_ObjFanin0( Hop_Obj_t * pObj ) { return Hop_Regular(pObj->pFanin0); } +static inline Hop_Obj_t * Hop_ObjFanin1( Hop_Obj_t * pObj ) { return Hop_Regular(pObj->pFanin1); } +static inline Hop_Obj_t * Hop_ObjChild0( Hop_Obj_t * pObj ) { return pObj->pFanin0; } +static inline Hop_Obj_t * Hop_ObjChild1( Hop_Obj_t * pObj ) { return pObj->pFanin1; } +static inline Hop_Obj_t * Hop_ObjChild0Copy( Hop_Obj_t * pObj ) { assert( !Hop_IsComplement(pObj) ); return Hop_ObjFanin0(pObj)? Hop_NotCond((Hop_Obj_t *)Hop_ObjFanin0(pObj)->pData, Hop_ObjFaninC0(pObj)) : NULL; } +static inline Hop_Obj_t * Hop_ObjChild1Copy( Hop_Obj_t * pObj ) { assert( !Hop_IsComplement(pObj) ); return Hop_ObjFanin1(pObj)? Hop_NotCond((Hop_Obj_t *)Hop_ObjFanin1(pObj)->pData, Hop_ObjFaninC1(pObj)) : NULL; } +static inline int Hop_ObjLevel( Hop_Obj_t * pObj ) { return pObj->nRefs; } +static inline int Hop_ObjLevelNew( Hop_Obj_t * pObj ) { return 1 + Hop_ObjIsExor(pObj) + AIG_MAX(Hop_ObjFanin0(pObj)->nRefs, Hop_ObjFanin1(pObj)->nRefs); } +static inline int Hop_ObjFaninPhase( Hop_Obj_t * pObj ) { return Hop_IsComplement(pObj)? !Hop_Regular(pObj)->fPhase : pObj->fPhase; } +static inline void Hop_ObjClean( Hop_Obj_t * pObj ) { memset( pObj, 0, sizeof(Hop_Obj_t) ); } +static inline int Hop_ObjWhatFanin( Hop_Obj_t * pObj, Hop_Obj_t * pFanin ) +{ + if ( Hop_ObjFanin0(pObj) == pFanin ) return 0; + if ( Hop_ObjFanin1(pObj) == pFanin ) return 1; + assert(0); return -1; +} +static inline int Hop_ObjFanoutC( Hop_Obj_t * pObj, Hop_Obj_t * pFanout ) +{ + if ( Hop_ObjFanin0(pFanout) == pObj ) return Hop_ObjFaninC0(pObj); + if ( Hop_ObjFanin1(pFanout) == pObj ) return Hop_ObjFaninC1(pObj); + assert(0); return -1; +} + +// create the ghost of the new node +static inline Hop_Obj_t * Hop_ObjCreateGhost( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1, Hop_Type_t Type ) +{ + Hop_Obj_t * pGhost; + assert( Type != AIG_AND || !Hop_ObjIsConst1(Hop_Regular(p0)) ); + assert( p1 == NULL || !Hop_ObjIsConst1(Hop_Regular(p1)) ); + assert( Type == AIG_PI || Hop_Regular(p0) != Hop_Regular(p1) ); + pGhost = Hop_ManGhost(p); + pGhost->Type = Type; + if ( Hop_Regular(p0)->Id < Hop_Regular(p1)->Id ) + { + pGhost->pFanin0 = p0; + pGhost->pFanin1 = p1; + } + else + { + pGhost->pFanin0 = p1; + pGhost->pFanin1 = p0; + } + return pGhost; +} + +// internal memory manager +static inline Hop_Obj_t * Hop_ManFetchMemory( Hop_Man_t * p ) +{ + extern void Hop_ManAddMemory( Hop_Man_t * p ); + Hop_Obj_t * pTemp; + if ( p->pListFree == NULL ) + Hop_ManAddMemory( p ); + pTemp = p->pListFree; + p->pListFree = *((Hop_Obj_t **)pTemp); + memset( pTemp, 0, sizeof(Hop_Obj_t) ); + if ( p->vObjs ) + { + assert( p->nCreated == Vec_PtrSize(p->vObjs) ); + Vec_PtrPush( p->vObjs, pTemp ); + } + pTemp->Id = p->nCreated++; + return pTemp; +} +static inline void Hop_ManRecycleMemory( Hop_Man_t * p, Hop_Obj_t * pEntry ) +{ + pEntry->Type = AIG_NONE; // distinquishes dead node from live node + *((Hop_Obj_t **)pEntry) = p->pListFree; + p->pListFree = pEntry; +} + + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over the primary inputs +#define Hop_ManForEachPi( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPis, pObj, i ) +// iterator over the primary outputs +#define Hop_ManForEachPo( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPos, pObj, i ) +// iterator over all objects, including those currently not used +#define Hop_ManForEachNode( p, pObj, i ) \ + for ( i = 0; i < p->nTableSize; i++ ) \ + if ( ((pObj) = p->pTable[i]) == NULL ) {} else + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== hopBalance.c ========================================================*/ +extern Hop_Man_t * Hop_ManBalance( Hop_Man_t * p, int fUpdateLevel ); +extern Hop_Obj_t * Hop_NodeBalanceBuildSuper( Hop_Man_t * p, Vec_Ptr_t * vSuper, Hop_Type_t Type, int fUpdateLevel ); +/*=== hopCheck.c ========================================================*/ +extern int Hop_ManCheck( Hop_Man_t * p ); +/*=== hopDfs.c ==========================================================*/ +extern Vec_Ptr_t * Hop_ManDfs( Hop_Man_t * p ); +extern Vec_Ptr_t * Hop_ManDfsNode( Hop_Man_t * p, Hop_Obj_t * pNode ); +extern int Hop_ManCountLevels( Hop_Man_t * p ); +extern void Hop_ManCreateRefs( Hop_Man_t * p ); +extern int Hop_DagSize( Hop_Obj_t * pObj ); +extern void Hop_ConeUnmark_rec( Hop_Obj_t * pObj ); +extern Hop_Obj_t * Hop_Transfer( Hop_Man_t * pSour, Hop_Man_t * pDest, Hop_Obj_t * pObj, int nVars ); +extern Hop_Obj_t * Hop_Compose( Hop_Man_t * p, Hop_Obj_t * pRoot, Hop_Obj_t * pFunc, int iVar ); +/*=== hopMan.c ==========================================================*/ +extern Hop_Man_t * Hop_ManStart(); +extern Hop_Man_t * Hop_ManDup( Hop_Man_t * p ); +extern void Hop_ManStop( Hop_Man_t * p ); +extern int Hop_ManCleanup( Hop_Man_t * p ); +extern void Hop_ManPrintStats( Hop_Man_t * p ); +/*=== hopMem.c ==========================================================*/ +extern void Hop_ManStartMemory( Hop_Man_t * p ); +extern void Hop_ManStopMemory( Hop_Man_t * p ); +/*=== hopObj.c ==========================================================*/ +extern Hop_Obj_t * Hop_ObjCreatePi( Hop_Man_t * p ); +extern Hop_Obj_t * Hop_ObjCreatePo( Hop_Man_t * p, Hop_Obj_t * pDriver ); +extern Hop_Obj_t * Hop_ObjCreate( Hop_Man_t * p, Hop_Obj_t * pGhost ); +extern void Hop_ObjConnect( Hop_Man_t * p, Hop_Obj_t * pObj, Hop_Obj_t * pFan0, Hop_Obj_t * pFan1 ); +extern void Hop_ObjDisconnect( Hop_Man_t * p, Hop_Obj_t * pObj ); +extern void Hop_ObjDelete( Hop_Man_t * p, Hop_Obj_t * pObj ); +extern void Hop_ObjDelete_rec( Hop_Man_t * p, Hop_Obj_t * pObj ); +extern Hop_Obj_t * Hop_ObjRepr( Hop_Obj_t * pObj ); +extern void Hop_ObjCreateChoice( Hop_Obj_t * pOld, Hop_Obj_t * pNew ); +/*=== hopOper.c =========================================================*/ +extern Hop_Obj_t * Hop_IthVar( Hop_Man_t * p, int i ); +extern Hop_Obj_t * Hop_Oper( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1, Hop_Type_t Type ); +extern Hop_Obj_t * Hop_And( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1 ); +extern Hop_Obj_t * Hop_Or( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1 ); +extern Hop_Obj_t * Hop_Exor( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1 ); +extern Hop_Obj_t * Hop_Mux( Hop_Man_t * p, Hop_Obj_t * pC, Hop_Obj_t * p1, Hop_Obj_t * p0 ); +extern Hop_Obj_t * Hop_Maj( Hop_Man_t * p, Hop_Obj_t * pA, Hop_Obj_t * pB, Hop_Obj_t * pC ); +extern Hop_Obj_t * Hop_Miter( Hop_Man_t * p, Vec_Ptr_t * vPairs ); +extern Hop_Obj_t * Hop_CreateAnd( Hop_Man_t * p, int nVars ); +extern Hop_Obj_t * Hop_CreateOr( Hop_Man_t * p, int nVars ); +extern Hop_Obj_t * Hop_CreateExor( Hop_Man_t * p, int nVars ); +/*=== hopTable.c ========================================================*/ +extern Hop_Obj_t * Hop_TableLookup( Hop_Man_t * p, Hop_Obj_t * pGhost ); +extern void Hop_TableInsert( Hop_Man_t * p, Hop_Obj_t * pObj ); +extern void Hop_TableDelete( Hop_Man_t * p, Hop_Obj_t * pObj ); +extern int Hop_TableCountEntries( Hop_Man_t * p ); +extern void Hop_TableProfile( Hop_Man_t * p ); +/*=== hopUtil.c =========================================================*/ +extern void Hop_ManIncrementTravId( Hop_Man_t * p ); +extern void Hop_ManCleanData( Hop_Man_t * p ); +extern void Hop_ObjCleanData_rec( Hop_Obj_t * pObj ); +extern void Hop_ObjCollectMulti( Hop_Obj_t * pFunc, Vec_Ptr_t * vSuper ); +extern int Hop_ObjIsMuxType( Hop_Obj_t * pObj ); +extern int Hop_ObjRecognizeExor( Hop_Obj_t * pObj, Hop_Obj_t ** ppFan0, Hop_Obj_t ** ppFan1 ); +extern Hop_Obj_t * Hop_ObjRecognizeMux( Hop_Obj_t * pObj, Hop_Obj_t ** ppObjT, Hop_Obj_t ** ppObjE ); +extern void Hop_ObjPrintEqn( FILE * pFile, Hop_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ); +extern void Hop_ObjPrintVerilog( FILE * pFile, Hop_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ); +extern void Hop_ObjPrintVerbose( Hop_Obj_t * pObj, int fHaig ); +extern void Hop_ManPrintVerbose( Hop_Man_t * p, int fHaig ); +extern void Hop_ManDumpBlif( Hop_Man_t * p, char * pFileName ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/hop/hopBalance.c b/src/aig/hop/hopBalance.c new file mode 100644 index 00000000..73c90685 --- /dev/null +++ b/src/aig/hop/hopBalance.c @@ -0,0 +1,391 @@ +/**CFile**************************************************************** + + FileName [hopBalance.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [Algebraic AIG balancing.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopBalance.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Hop_Obj_t * Hop_NodeBalance_rec( Hop_Man_t * pNew, Hop_Obj_t * pObj, Vec_Vec_t * vStore, int Level, int fUpdateLevel ); +static Vec_Ptr_t * Hop_NodeBalanceCone( Hop_Obj_t * pObj, Vec_Vec_t * vStore, int Level ); +static int Hop_NodeBalanceFindLeft( Vec_Ptr_t * vSuper ); +static void Hop_NodeBalancePermute( Hop_Man_t * p, Vec_Ptr_t * vSuper, int LeftBound, int fExor ); +static void Hop_NodeBalancePushUniqueOrderByLevel( Vec_Ptr_t * vStore, Hop_Obj_t * pObj ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs algebraic balancing of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Man_t * Hop_ManBalance( Hop_Man_t * p, int fUpdateLevel ) +{ + Hop_Man_t * pNew; + Hop_Obj_t * pObj, * pObjNew; + Vec_Vec_t * vStore; + int i; + // create the new manager + pNew = Hop_ManStart(); + pNew->fRefCount = 0; + // map the PI nodes + Hop_ManCleanData( p ); + Hop_ManConst1(p)->pData = Hop_ManConst1(pNew); + Hop_ManForEachPi( p, pObj, i ) + pObj->pData = Hop_ObjCreatePi(pNew); + // balance the AIG + vStore = Vec_VecAlloc( 50 ); + Hop_ManForEachPo( p, pObj, i ) + { + pObjNew = Hop_NodeBalance_rec( pNew, Hop_ObjFanin0(pObj), vStore, 0, fUpdateLevel ); + Hop_ObjCreatePo( pNew, Hop_NotCond( pObjNew, Hop_ObjFaninC0(pObj) ) ); + } + Vec_VecFree( vStore ); + // remove dangling nodes +// Hop_ManCreateRefs( pNew ); +// if ( i = Hop_ManCleanup( pNew ) ) +// printf( "Cleanup after balancing removed %d dangling nodes.\n", i ); + // check the resulting AIG + if ( !Hop_ManCheck(pNew) ) + printf( "Hop_ManBalance(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Returns the new node constructed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_NodeBalance_rec( Hop_Man_t * pNew, Hop_Obj_t * pObjOld, Vec_Vec_t * vStore, int Level, int fUpdateLevel ) +{ + Hop_Obj_t * pObjNew; + Vec_Ptr_t * vSuper; + int i; + assert( !Hop_IsComplement(pObjOld) ); + // return if the result is known + if ( pObjOld->pData ) + return pObjOld->pData; + assert( Hop_ObjIsNode(pObjOld) ); + // get the implication supergate + vSuper = Hop_NodeBalanceCone( pObjOld, vStore, Level ); + // check if supergate contains two nodes in the opposite polarity + if ( vSuper->nSize == 0 ) + return pObjOld->pData = Hop_ManConst0(pNew); + if ( Vec_PtrSize(vSuper) < 2 ) + printf( "BUG!\n" ); + // for each old node, derive the new well-balanced node + for ( i = 0; i < Vec_PtrSize(vSuper); i++ ) + { + pObjNew = Hop_NodeBalance_rec( pNew, Hop_Regular(vSuper->pArray[i]), vStore, Level + 1, fUpdateLevel ); + vSuper->pArray[i] = Hop_NotCond( pObjNew, Hop_IsComplement(vSuper->pArray[i]) ); + } + // build the supergate + pObjNew = Hop_NodeBalanceBuildSuper( pNew, vSuper, Hop_ObjType(pObjOld), fUpdateLevel ); + // make sure the balanced node is not assigned +// assert( pObjOld->Level >= Hop_Regular(pObjNew)->Level ); + assert( pObjOld->pData == NULL ); + return pObjOld->pData = pObjNew; +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_NodeBalanceCone_rec( Hop_Obj_t * pRoot, Hop_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + int RetValue1, RetValue2, i; + // check if the node is visited + if ( Hop_Regular(pObj)->fMarkB ) + { + // check if the node occurs in the same polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == pObj ) + return 1; + // check if the node is present in the opposite polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == Hop_Not(pObj) ) + return -1; + assert( 0 ); + return 0; + } + // if the new node is complemented or a PI, another gate begins + if ( pObj != pRoot && (Hop_IsComplement(pObj) || Hop_ObjType(pObj) != Hop_ObjType(pRoot) || Hop_ObjRefs(pObj) > 1) ) + { + Vec_PtrPush( vSuper, pObj ); + Hop_Regular(pObj)->fMarkB = 1; + return 0; + } + assert( !Hop_IsComplement(pObj) ); + assert( Hop_ObjIsNode(pObj) ); + // go through the branches + RetValue1 = Hop_NodeBalanceCone_rec( pRoot, Hop_ObjChild0(pObj), vSuper ); + RetValue2 = Hop_NodeBalanceCone_rec( pRoot, Hop_ObjChild1(pObj), vSuper ); + if ( RetValue1 == -1 || RetValue2 == -1 ) + return -1; + // return 1 if at least one branch has a duplicate + return RetValue1 || RetValue2; +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Hop_NodeBalanceCone( Hop_Obj_t * pObj, Vec_Vec_t * vStore, int Level ) +{ + Vec_Ptr_t * vNodes; + int RetValue, i; + assert( !Hop_IsComplement(pObj) ); + // extend the storage + if ( Vec_VecSize( vStore ) <= Level ) + Vec_VecPush( vStore, Level, 0 ); + // get the temporary array of nodes + vNodes = Vec_VecEntry( vStore, Level ); + Vec_PtrClear( vNodes ); + // collect the nodes in the implication supergate + RetValue = Hop_NodeBalanceCone_rec( pObj, pObj, vNodes ); + assert( vNodes->nSize > 1 ); + // unmark the visited nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + Hop_Regular(pObj)->fMarkB = 0; + // if we found the node and its complement in the same implication supergate, + // return empty set of nodes (meaning that we should use constant-0 node) + if ( RetValue == -1 ) + vNodes->nSize = 0; + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Procedure used for sorting the nodes in decreasing order of levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_NodeCompareLevelsDecrease( Hop_Obj_t ** pp1, Hop_Obj_t ** pp2 ) +{ + int Diff = Hop_ObjLevel(Hop_Regular(*pp1)) - Hop_ObjLevel(Hop_Regular(*pp2)); + if ( Diff > 0 ) + return -1; + if ( Diff < 0 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Builds implication supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_NodeBalanceBuildSuper( Hop_Man_t * p, Vec_Ptr_t * vSuper, Hop_Type_t Type, int fUpdateLevel ) +{ + Hop_Obj_t * pObj1, * pObj2; + int LeftBound; + assert( vSuper->nSize > 1 ); + // sort the new nodes by level in the decreasing order + Vec_PtrSort( vSuper, Hop_NodeCompareLevelsDecrease ); + // balance the nodes + while ( vSuper->nSize > 1 ) + { + // find the left bound on the node to be paired + LeftBound = (!fUpdateLevel)? 0 : Hop_NodeBalanceFindLeft( vSuper ); + // find the node that can be shared (if no such node, randomize choice) + Hop_NodeBalancePermute( p, vSuper, LeftBound, Type == AIG_EXOR ); + // pull out the last two nodes + pObj1 = Vec_PtrPop(vSuper); + pObj2 = Vec_PtrPop(vSuper); + Hop_NodeBalancePushUniqueOrderByLevel( vSuper, Hop_Oper(p, pObj1, pObj2, Type) ); + } + return Vec_PtrEntry(vSuper, 0); +} + +/**Function************************************************************* + + Synopsis [Finds the left bound on the next candidate to be paired.] + + Description [The nodes in the array are in the decreasing order of levels. + The last node in the array has the smallest level. By default it would be paired + with the next node on the left. However, it may be possible to pair it with some + other node on the left, in such a way that the new node is shared. This procedure + finds the index of the left-most node, which can be paired with the last node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_NodeBalanceFindLeft( Vec_Ptr_t * vSuper ) +{ + Hop_Obj_t * pObjRight, * pObjLeft; + int Current; + // if two or less nodes, pair with the first + if ( Vec_PtrSize(vSuper) < 3 ) + return 0; + // set the pointer to the one before the last + Current = Vec_PtrSize(vSuper) - 2; + pObjRight = Vec_PtrEntry( vSuper, Current ); + // go through the nodes to the left of this one + for ( Current--; Current >= 0; Current-- ) + { + // get the next node on the left + pObjLeft = Vec_PtrEntry( vSuper, Current ); + // if the level of this node is different, quit the loop + if ( Hop_ObjLevel(Hop_Regular(pObjLeft)) != Hop_ObjLevel(Hop_Regular(pObjRight)) ) + break; + } + Current++; + // get the node, for which the equality holds + pObjLeft = Vec_PtrEntry( vSuper, Current ); + assert( Hop_ObjLevel(Hop_Regular(pObjLeft)) == Hop_ObjLevel(Hop_Regular(pObjRight)) ); + return Current; +} + +/**Function************************************************************* + + Synopsis [Moves closer to the end the node that is best for sharing.] + + Description [If there is no node with sharing, randomly chooses one of + the legal nodes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_NodeBalancePermute( Hop_Man_t * p, Vec_Ptr_t * vSuper, int LeftBound, int fExor ) +{ + Hop_Obj_t * pObj1, * pObj2, * pObj3, * pGhost; + int RightBound, i; + // get the right bound + RightBound = Vec_PtrSize(vSuper) - 2; + assert( LeftBound <= RightBound ); + if ( LeftBound == RightBound ) + return; + // get the two last nodes + pObj1 = Vec_PtrEntry( vSuper, RightBound + 1 ); + pObj2 = Vec_PtrEntry( vSuper, RightBound ); + if ( Hop_Regular(pObj1) == p->pConst1 || Hop_Regular(pObj2) == p->pConst1 ) + return; + // find the first node that can be shared + for ( i = RightBound; i >= LeftBound; i-- ) + { + pObj3 = Vec_PtrEntry( vSuper, i ); + if ( Hop_Regular(pObj3) == p->pConst1 ) + { + Vec_PtrWriteEntry( vSuper, i, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + return; + } + pGhost = Hop_ObjCreateGhost( p, pObj1, pObj3, fExor? AIG_EXOR : AIG_AND ); + if ( Hop_TableLookup( p, pGhost ) ) + { + if ( pObj3 == pObj2 ) + return; + Vec_PtrWriteEntry( vSuper, i, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + return; + } + } +/* + // we did not find the node to share, randomize choice + { + int Choice = rand() % (RightBound - LeftBound + 1); + pObj3 = Vec_PtrEntry( vSuper, LeftBound + Choice ); + if ( pObj3 == pObj2 ) + return; + Vec_PtrWriteEntry( vSuper, LeftBound + Choice, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + } +*/ +} + +/**Function************************************************************* + + Synopsis [Inserts a new node in the order by levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_NodeBalancePushUniqueOrderByLevel( Vec_Ptr_t * vStore, Hop_Obj_t * pObj ) +{ + Hop_Obj_t * pObj1, * pObj2; + int i; + if ( Vec_PtrPushUnique(vStore, pObj) ) + return; + // find the p of the node + for ( i = vStore->nSize-1; i > 0; i-- ) + { + pObj1 = vStore->pArray[i ]; + pObj2 = vStore->pArray[i-1]; + if ( Hop_ObjLevel(Hop_Regular(pObj1)) <= Hop_ObjLevel(Hop_Regular(pObj2)) ) + break; + vStore->pArray[i ] = pObj2; + vStore->pArray[i-1] = pObj1; + } +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopCheck.c b/src/aig/hop/hopCheck.c new file mode 100644 index 00000000..9120906f --- /dev/null +++ b/src/aig/hop/hopCheck.c @@ -0,0 +1,110 @@ +/**CFile**************************************************************** + + FileName [hopCheck.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [AIG checking procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopCheck.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Checks the consistency of the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_ManCheck( Hop_Man_t * p ) +{ + Hop_Obj_t * pObj, * pObj2; + int i; + // check primary inputs + Hop_ManForEachPi( p, pObj, i ) + { + if ( Hop_ObjFanin0(pObj) || Hop_ObjFanin1(pObj) ) + { + printf( "Hop_ManCheck: The PI node \"%p\" has fanins.\n", pObj ); + return 0; + } + } + // check primary outputs + Hop_ManForEachPo( p, pObj, i ) + { + if ( !Hop_ObjFanin0(pObj) ) + { + printf( "Hop_ManCheck: The PO node \"%p\" has NULL fanin.\n", pObj ); + return 0; + } + if ( Hop_ObjFanin1(pObj) ) + { + printf( "Hop_ManCheck: The PO node \"%p\" has second fanin.\n", pObj ); + return 0; + } + } + // check internal nodes + Hop_ManForEachNode( p, pObj, i ) + { + if ( !Hop_ObjFanin0(pObj) || !Hop_ObjFanin1(pObj) ) + { + printf( "Hop_ManCheck: The AIG has internal node \"%p\" with a NULL fanin.\n", pObj ); + return 0; + } + if ( Hop_ObjFanin0(pObj)->Id >= Hop_ObjFanin1(pObj)->Id ) + { + printf( "Hop_ManCheck: The AIG has node \"%p\" with a wrong ordering of fanins.\n", pObj ); + return 0; + } + pObj2 = Hop_TableLookup( p, pObj ); + if ( pObj2 != pObj ) + { + printf( "Hop_ManCheck: Node \"%p\" is not in the structural hashing table.\n", pObj ); + return 0; + } + } + // count the total number of nodes + if ( Hop_ManObjNum(p) != 1 + Hop_ManPiNum(p) + Hop_ManPoNum(p) + Hop_ManAndNum(p) + Hop_ManExorNum(p) ) + { + printf( "Hop_ManCheck: The number of created nodes is wrong.\n" ); + return 0; + } + // count the number of nodes in the table + if ( Hop_TableCountEntries(p) != Hop_ManAndNum(p) + Hop_ManExorNum(p) ) + { + printf( "Hop_ManCheck: The number of nodes in the structural hashing table is wrong.\n" ); + return 0; + } +// if ( !Hop_ManIsAcyclic(p) ) +// return 0; + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopDfs.c b/src/aig/hop/hopDfs.c new file mode 100644 index 00000000..49e5f221 --- /dev/null +++ b/src/aig/hop/hopDfs.c @@ -0,0 +1,399 @@ +/**CFile**************************************************************** + + FileName [hopDfs.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [DFS traversal procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopDfs.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManDfs_rec( Hop_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) ) + return; + Hop_ManDfs_rec( Hop_ObjFanin0(pObj), vNodes ); + Hop_ManDfs_rec( Hop_ObjFanin1(pObj), vNodes ); + assert( !Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjSetMarkA(pObj); + Vec_PtrPush( vNodes, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Hop_ManDfs( Hop_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Hop_Obj_t * pObj; + int i; + vNodes = Vec_PtrAlloc( Hop_ManNodeNum(p) ); + Hop_ManForEachNode( p, pObj, i ) + Hop_ManDfs_rec( pObj, vNodes ); + Hop_ManForEachNode( p, pObj, i ) + Hop_ObjClearMarkA(pObj); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects internal nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Hop_ManDfsNode( Hop_Man_t * p, Hop_Obj_t * pNode ) +{ + Vec_Ptr_t * vNodes; + Hop_Obj_t * pObj; + int i; + assert( !Hop_IsComplement(pNode) ); + vNodes = Vec_PtrAlloc( 16 ); + Hop_ManDfs_rec( pNode, vNodes ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + Hop_ObjClearMarkA(pObj); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Computes the max number of levels in the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_ManCountLevels( Hop_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Hop_Obj_t * pObj; + int i, LevelsMax, Level0, Level1; + // initialize the levels + Hop_ManConst1(p)->pData = NULL; + Hop_ManForEachPi( p, pObj, i ) + pObj->pData = NULL; + // compute levels in a DFS order + vNodes = Hop_ManDfs( p ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + Level0 = (int)Hop_ObjFanin0(pObj)->pData; + Level1 = (int)Hop_ObjFanin1(pObj)->pData; + pObj->pData = (void *)(1 + Hop_ObjIsExor(pObj) + AIG_MAX(Level0, Level1)); + } + Vec_PtrFree( vNodes ); + // get levels of the POs + LevelsMax = 0; + Hop_ManForEachPo( p, pObj, i ) + LevelsMax = AIG_MAX( LevelsMax, (int)Hop_ObjFanin0(pObj)->pData ); + return LevelsMax; +} + +/**Function************************************************************* + + Synopsis [Creates correct reference counters at each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManCreateRefs( Hop_Man_t * p ) +{ + Hop_Obj_t * pObj; + int i; + if ( p->fRefCount ) + return; + p->fRefCount = 1; + // clear refs + Hop_ObjClearRef( Hop_ManConst1(p) ); + Hop_ManForEachPi( p, pObj, i ) + Hop_ObjClearRef( pObj ); + Hop_ManForEachNode( p, pObj, i ) + Hop_ObjClearRef( pObj ); + Hop_ManForEachPo( p, pObj, i ) + Hop_ObjClearRef( pObj ); + // set refs + Hop_ManForEachNode( p, pObj, i ) + { + Hop_ObjRef( Hop_ObjFanin0(pObj) ); + Hop_ObjRef( Hop_ObjFanin1(pObj) ); + } + Hop_ManForEachPo( p, pObj, i ) + Hop_ObjRef( Hop_ObjFanin0(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ConeMark_rec( Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) ) + return; + Hop_ConeMark_rec( Hop_ObjFanin0(pObj) ); + Hop_ConeMark_rec( Hop_ObjFanin1(pObj) ); + assert( !Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjSetMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ConeCleanAndMark_rec( Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) ) + return; + Hop_ConeCleanAndMark_rec( Hop_ObjFanin0(pObj) ); + Hop_ConeCleanAndMark_rec( Hop_ObjFanin1(pObj) ); + assert( !Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjSetMarkA( pObj ); + pObj->pData = NULL; +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_ConeCountAndMark_rec( Hop_Obj_t * pObj ) +{ + int Counter; + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) ) + return 0; + Counter = 1 + Hop_ConeCountAndMark_rec( Hop_ObjFanin0(pObj) ) + + Hop_ConeCountAndMark_rec( Hop_ObjFanin1(pObj) ); + assert( !Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjSetMarkA( pObj ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ConeUnmark_rec( Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) || !Hop_ObjIsMarkA(pObj) ) + return; + Hop_ConeUnmark_rec( Hop_ObjFanin0(pObj) ); + Hop_ConeUnmark_rec( Hop_ObjFanin1(pObj) ); + assert( Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjClearMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Counts the number of AIG nodes rooted at this cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_DagSize( Hop_Obj_t * pObj ) +{ + int Counter; + Counter = Hop_ConeCountAndMark_rec( Hop_Regular(pObj) ); + Hop_ConeUnmark_rec( Hop_Regular(pObj) ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Transfers the AIG from one manager into another.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_Transfer_rec( Hop_Man_t * pDest, Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) ) + return; + Hop_Transfer_rec( pDest, Hop_ObjFanin0(pObj) ); + Hop_Transfer_rec( pDest, Hop_ObjFanin1(pObj) ); + pObj->pData = Hop_And( pDest, Hop_ObjChild0Copy(pObj), Hop_ObjChild1Copy(pObj) ); + assert( !Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjSetMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Transfers the AIG from one manager into another.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Transfer( Hop_Man_t * pSour, Hop_Man_t * pDest, Hop_Obj_t * pRoot, int nVars ) +{ + Hop_Obj_t * pObj; + int i; + // solve simple cases + if ( pSour == pDest ) + return pRoot; + if ( Hop_ObjIsConst1( Hop_Regular(pRoot) ) ) + return Hop_NotCond( Hop_ManConst1(pDest), Hop_IsComplement(pRoot) ); + // set the PI mapping + Hop_ManForEachPi( pSour, pObj, i ) + { + if ( i == nVars ) + break; + pObj->pData = Hop_IthVar(pDest, i); + } + // transfer and set markings + Hop_Transfer_rec( pDest, Hop_Regular(pRoot) ); + // clear the markings + Hop_ConeUnmark_rec( Hop_Regular(pRoot) ); + return Hop_NotCond( Hop_Regular(pRoot)->pData, Hop_IsComplement(pRoot) ); +} + +/**Function************************************************************* + + Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_Compose_rec( Hop_Man_t * p, Hop_Obj_t * pObj, Hop_Obj_t * pFunc, Hop_Obj_t * pVar ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( Hop_ObjIsMarkA(pObj) ) + return; + if ( Hop_ObjIsConst1(pObj) || Hop_ObjIsPi(pObj) ) + { + pObj->pData = pObj == pVar ? pFunc : pObj; + return; + } + Hop_Compose_rec( p, Hop_ObjFanin0(pObj), pFunc, pVar ); + Hop_Compose_rec( p, Hop_ObjFanin1(pObj), pFunc, pVar ); + pObj->pData = Hop_And( p, Hop_ObjChild0Copy(pObj), Hop_ObjChild1Copy(pObj) ); + assert( !Hop_ObjIsMarkA(pObj) ); // loop detection + Hop_ObjSetMarkA( pObj ); +} + +/**Function************************************************************* + + Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Compose( Hop_Man_t * p, Hop_Obj_t * pRoot, Hop_Obj_t * pFunc, int iVar ) +{ + // quit if the PI variable is not defined + if ( iVar >= Hop_ManPiNum(p) ) + { + printf( "Hop_Compose(): The PI variable %d is not defined.\n", iVar ); + return NULL; + } + // recursively perform composition + Hop_Compose_rec( p, Hop_Regular(pRoot), pFunc, Hop_ManPi(p, iVar) ); + // clear the markings + Hop_ConeUnmark_rec( Hop_Regular(pRoot) ); + return Hop_NotCond( Hop_Regular(pRoot)->pData, Hop_IsComplement(pRoot) ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopMan.c b/src/aig/hop/hopMan.c new file mode 100644 index 00000000..99f5d316 --- /dev/null +++ b/src/aig/hop/hopMan.c @@ -0,0 +1,164 @@ +/**CFile**************************************************************** + + FileName [hopMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [AIG manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopMan.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Man_t * Hop_ManStart() +{ + Hop_Man_t * p; + // start the manager + p = ALLOC( Hop_Man_t, 1 ); + memset( p, 0, sizeof(Hop_Man_t) ); + // perform initializations + p->nTravIds = 1; + p->fRefCount = 1; + p->fCatchExor = 0; + // allocate arrays for nodes + p->vPis = Vec_PtrAlloc( 100 ); + p->vPos = Vec_PtrAlloc( 100 ); + // prepare the internal memory manager + Hop_ManStartMemory( p ); + // create the constant node + p->pConst1 = Hop_ManFetchMemory( p ); + p->pConst1->Type = AIG_CONST1; + p->pConst1->fPhase = 1; + p->nCreated = 1; + // start the table +// p->nTableSize = 107; + p->nTableSize = 10007; + p->pTable = ALLOC( Hop_Obj_t *, p->nTableSize ); + memset( p->pTable, 0, sizeof(Hop_Obj_t *) * p->nTableSize ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManStop( Hop_Man_t * p ) +{ + Hop_Obj_t * pObj; + int i; + // make sure the nodes have clean marks + pObj = Hop_ManConst1(p); + assert( !pObj->fMarkA && !pObj->fMarkB ); + Hop_ManForEachPi( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); + Hop_ManForEachPo( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); + Hop_ManForEachNode( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); + // print time + if ( p->time1 ) { PRT( "time1", p->time1 ); } + if ( p->time2 ) { PRT( "time2", p->time2 ); } +// Hop_TableProfile( p ); + if ( p->vChunks ) Hop_ManStopMemory( p ); + if ( p->vPis ) Vec_PtrFree( p->vPis ); + if ( p->vPos ) Vec_PtrFree( p->vPos ); + if ( p->vObjs ) Vec_PtrFree( p->vObjs ); + free( p->pTable ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_ManCleanup( Hop_Man_t * p ) +{ + Vec_Ptr_t * vObjs; + Hop_Obj_t * pNode; + int i, nNodesOld; + assert( p->fRefCount ); + nNodesOld = Hop_ManNodeNum(p); + // collect roots of dangling nodes + vObjs = Vec_PtrAlloc( 100 ); + Hop_ManForEachNode( p, pNode, i ) + if ( Hop_ObjRefs(pNode) == 0 ) + Vec_PtrPush( vObjs, pNode ); + // recursively remove dangling nodes + Vec_PtrForEachEntry( vObjs, pNode, i ) + Hop_ObjDelete_rec( p, pNode ); + Vec_PtrFree( vObjs ); + return nNodesOld - Hop_ManNodeNum(p); +} + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManPrintStats( Hop_Man_t * p ) +{ + printf( "PI/PO = %d/%d. ", Hop_ManPiNum(p), Hop_ManPoNum(p) ); + printf( "A = %7d. ", Hop_ManAndNum(p) ); + printf( "X = %5d. ", Hop_ManExorNum(p) ); + printf( "Cre = %7d. ", p->nCreated ); + printf( "Del = %7d. ", p->nDeleted ); + printf( "Lev = %3d. ", Hop_ManCountLevels(p) ); + printf( "\n" ); +} + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopMem.c b/src/aig/hop/hopMem.c new file mode 100644 index 00000000..0665470a --- /dev/null +++ b/src/aig/hop/hopMem.c @@ -0,0 +1,115 @@ +/**CFile**************************************************************** + + FileName [hopMem.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [Memory management for the AIG nodes.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopMem.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// memory management +#define IVY_PAGE_SIZE 12 // page size containing 2^IVY_PAGE_SIZE nodes +#define IVY_PAGE_MASK 4095 // page bitmask (2^IVY_PAGE_SIZE)-1 + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the internal memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManStartMemory( Hop_Man_t * p ) +{ + p->vChunks = Vec_PtrAlloc( 128 ); + p->vPages = Vec_PtrAlloc( 128 ); +} + +/**Function************************************************************* + + Synopsis [Stops the internal memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManStopMemory( Hop_Man_t * p ) +{ + void * pMemory; + int i; + Vec_PtrForEachEntry( p->vChunks, pMemory, i ) + free( pMemory ); + Vec_PtrFree( p->vChunks ); + Vec_PtrFree( p->vPages ); + p->pListFree = NULL; +} + +/**Function************************************************************* + + Synopsis [Allocates additional memory for the nodes.] + + Description [Allocates IVY_PAGE_SIZE nodes. Aligns memory by 32 bytes. + Records the pointer to the AIG manager in the -1 entry.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManAddMemory( Hop_Man_t * p ) +{ + char * pMemory; + int i, nBytes; + assert( sizeof(Hop_Obj_t) <= 64 ); + assert( p->pListFree == NULL ); +// assert( (Hop_ManObjNum(p) & IVY_PAGE_MASK) == 0 ); + // allocate new memory page + nBytes = sizeof(Hop_Obj_t) * (1<<IVY_PAGE_SIZE) + 64; + pMemory = ALLOC( char, nBytes ); + Vec_PtrPush( p->vChunks, pMemory ); + // align memory at the 32-byte boundary + pMemory = pMemory + 64 - (((int)pMemory) & 63); + // remember the manager in the first entry + Vec_PtrPush( p->vPages, pMemory ); + // break the memory down into nodes + p->pListFree = (Hop_Obj_t *)pMemory; + for ( i = 1; i <= IVY_PAGE_MASK; i++ ) + { + *((char **)pMemory) = pMemory + sizeof(Hop_Obj_t); + pMemory += sizeof(Hop_Obj_t); + } + *((char **)pMemory) = NULL; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopObj.c b/src/aig/hop/hopObj.c new file mode 100644 index 00000000..c8e70dd3 --- /dev/null +++ b/src/aig/hop/hopObj.c @@ -0,0 +1,271 @@ +/**CFile**************************************************************** + + FileName [hopObj.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [Adding/removing objects.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopObj.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Creates primary input.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_ObjCreatePi( Hop_Man_t * p ) +{ + Hop_Obj_t * pObj; + pObj = Hop_ManFetchMemory( p ); + pObj->Type = AIG_PI; + Vec_PtrPush( p->vPis, pObj ); + p->nObjs[AIG_PI]++; + return pObj; +} + +/**Function************************************************************* + + Synopsis [Creates primary output with the given driver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_ObjCreatePo( Hop_Man_t * p, Hop_Obj_t * pDriver ) +{ + Hop_Obj_t * pObj; + pObj = Hop_ManFetchMemory( p ); + pObj->Type = AIG_PO; + Vec_PtrPush( p->vPos, pObj ); + // add connections + pObj->pFanin0 = pDriver; + if ( p->fRefCount ) + Hop_ObjRef( Hop_Regular(pDriver) ); + else + pObj->nRefs = Hop_ObjLevel( Hop_Regular(pDriver) ); + // set the phase + pObj->fPhase = Hop_ObjFaninPhase(pDriver); + // update node counters of the manager + p->nObjs[AIG_PO]++; + return pObj; +} + +/**Function************************************************************* + + Synopsis [Create the new node assuming it does not exist.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_ObjCreate( Hop_Man_t * p, Hop_Obj_t * pGhost ) +{ + Hop_Obj_t * pObj; + assert( !Hop_IsComplement(pGhost) ); + assert( Hop_ObjIsNode(pGhost) ); + assert( pGhost == &p->Ghost ); + // get memory for the new object + pObj = Hop_ManFetchMemory( p ); + pObj->Type = pGhost->Type; + // add connections + Hop_ObjConnect( p, pObj, pGhost->pFanin0, pGhost->pFanin1 ); + // update node counters of the manager + p->nObjs[Hop_ObjType(pObj)]++; + assert( pObj->pData == NULL ); + return pObj; +} + +/**Function************************************************************* + + Synopsis [Connect the object to the fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjConnect( Hop_Man_t * p, Hop_Obj_t * pObj, Hop_Obj_t * pFan0, Hop_Obj_t * pFan1 ) +{ + assert( !Hop_IsComplement(pObj) ); + assert( Hop_ObjIsNode(pObj) ); + // add the first fanin + pObj->pFanin0 = pFan0; + pObj->pFanin1 = pFan1; + // increment references of the fanins and add their fanouts + if ( p->fRefCount ) + { + if ( pFan0 != NULL ) + Hop_ObjRef( Hop_ObjFanin0(pObj) ); + if ( pFan1 != NULL ) + Hop_ObjRef( Hop_ObjFanin1(pObj) ); + } + else + pObj->nRefs = Hop_ObjLevelNew( pObj ); + // set the phase + pObj->fPhase = Hop_ObjFaninPhase(pFan0) & Hop_ObjFaninPhase(pFan1); + // add the node to the structural hash table + Hop_TableInsert( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Connect the object to the fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjDisconnect( Hop_Man_t * p, Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + assert( Hop_ObjIsNode(pObj) ); + // remove connections + if ( pObj->pFanin0 != NULL ) + Hop_ObjDeref(Hop_ObjFanin0(pObj)); + if ( pObj->pFanin1 != NULL ) + Hop_ObjDeref(Hop_ObjFanin1(pObj)); + // remove the node from the structural hash table + Hop_TableDelete( p, pObj ); + // add the first fanin + pObj->pFanin0 = NULL; + pObj->pFanin1 = NULL; +} + +/**Function************************************************************* + + Synopsis [Deletes the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjDelete( Hop_Man_t * p, Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + assert( !Hop_ObjIsTerm(pObj) ); + assert( Hop_ObjRefs(pObj) == 0 ); + // update node counters of the manager + p->nObjs[pObj->Type]--; + p->nDeleted++; + // remove connections + Hop_ObjDisconnect( p, pObj ); + // remove PIs/POs from the arrays + if ( Hop_ObjIsPi(pObj) ) + Vec_PtrRemove( p->vPis, pObj ); + // free the node + Hop_ManRecycleMemory( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Deletes the MFFC of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjDelete_rec( Hop_Man_t * p, Hop_Obj_t * pObj ) +{ + Hop_Obj_t * pFanin0, * pFanin1; + assert( !Hop_IsComplement(pObj) ); + if ( Hop_ObjIsConst1(pObj) || Hop_ObjIsPi(pObj) ) + return; + assert( Hop_ObjIsNode(pObj) ); + pFanin0 = Hop_ObjFanin0(pObj); + pFanin1 = Hop_ObjFanin1(pObj); + Hop_ObjDelete( p, pObj ); + if ( pFanin0 && !Hop_ObjIsNone(pFanin0) && Hop_ObjRefs(pFanin0) == 0 ) + Hop_ObjDelete_rec( p, pFanin0 ); + if ( pFanin1 && !Hop_ObjIsNone(pFanin1) && Hop_ObjRefs(pFanin1) == 0 ) + Hop_ObjDelete_rec( p, pFanin1 ); +} + +/**Function************************************************************* + + Synopsis [Returns the representative of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_ObjRepr( Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + if ( pObj->pData == NULL || pObj->pData == pObj ) + return pObj; + return Hop_ObjRepr( pObj->pData ); +} + +/**Function************************************************************* + + Synopsis [Sets an equivalence relation between the nodes.] + + Description [Makes the representative of pNew point to the representaive of pOld.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjCreateChoice( Hop_Obj_t * pOld, Hop_Obj_t * pNew ) +{ + Hop_Obj_t * pOldRepr; + Hop_Obj_t * pNewRepr; + assert( pOld != NULL && pNew != NULL ); + pOldRepr = Hop_ObjRepr(pOld); + pNewRepr = Hop_ObjRepr(pNew); + if ( pNewRepr != pOldRepr ) + pNewRepr->pData = pOldRepr; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopOper.c b/src/aig/hop/hopOper.c new file mode 100644 index 00000000..a31ca0f2 --- /dev/null +++ b/src/aig/hop/hopOper.c @@ -0,0 +1,373 @@ +/**CFile**************************************************************** + + FileName [hopOper.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [AIG operations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopOper.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// procedure to detect an EXOR gate +static inline int Hop_ObjIsExorType( Hop_Obj_t * p0, Hop_Obj_t * p1, Hop_Obj_t ** ppFan0, Hop_Obj_t ** ppFan1 ) +{ + if ( !Hop_IsComplement(p0) || !Hop_IsComplement(p1) ) + return 0; + p0 = Hop_Regular(p0); + p1 = Hop_Regular(p1); + if ( !Hop_ObjIsAnd(p0) || !Hop_ObjIsAnd(p1) ) + return 0; + if ( Hop_ObjFanin0(p0) != Hop_ObjFanin0(p1) || Hop_ObjFanin1(p0) != Hop_ObjFanin1(p1) ) + return 0; + if ( Hop_ObjFaninC0(p0) == Hop_ObjFaninC0(p1) || Hop_ObjFaninC1(p0) == Hop_ObjFaninC1(p1) ) + return 0; + *ppFan0 = Hop_ObjChild0(p0); + *ppFan1 = Hop_ObjChild1(p0); + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns i-th elementary variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_IthVar( Hop_Man_t * p, int i ) +{ + int v; + for ( v = Hop_ManPiNum(p); v <= i; v++ ) + Hop_ObjCreatePi( p ); + assert( i < Vec_PtrSize(p->vPis) ); + return Hop_ManPi( p, i ); +} + +/**Function************************************************************* + + Synopsis [Perform one operation.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Oper( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1, Hop_Type_t Type ) +{ + if ( Type == AIG_AND ) + return Hop_And( p, p0, p1 ); + if ( Type == AIG_EXOR ) + return Hop_Exor( p, p0, p1 ); + assert( 0 ); + return NULL; +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_And( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1 ) +{ + Hop_Obj_t * pGhost, * pResult; +// Hop_Obj_t * pFan0, * pFan1; + // check trivial cases + if ( p0 == p1 ) + return p0; + if ( p0 == Hop_Not(p1) ) + return Hop_Not(p->pConst1); + if ( Hop_Regular(p0) == p->pConst1 ) + return p0 == p->pConst1 ? p1 : Hop_Not(p->pConst1); + if ( Hop_Regular(p1) == p->pConst1 ) + return p1 == p->pConst1 ? p0 : Hop_Not(p->pConst1); + // check if it can be an EXOR gate +// if ( Hop_ObjIsExorType( p0, p1, &pFan0, &pFan1 ) ) +// return Hop_Exor( p, pFan0, pFan1 ); + // check the table + pGhost = Hop_ObjCreateGhost( p, p0, p1, AIG_AND ); + if ( pResult = Hop_TableLookup( p, pGhost ) ) + return pResult; + return Hop_ObjCreate( p, pGhost ); +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Exor( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1 ) +{ +/* + Hop_Obj_t * pGhost, * pResult; + // check trivial cases + if ( p0 == p1 ) + return Hop_Not(p->pConst1); + if ( p0 == Hop_Not(p1) ) + return p->pConst1; + if ( Hop_Regular(p0) == p->pConst1 ) + return Hop_NotCond( p1, p0 == p->pConst1 ); + if ( Hop_Regular(p1) == p->pConst1 ) + return Hop_NotCond( p0, p1 == p->pConst1 ); + // check the table + pGhost = Hop_ObjCreateGhost( p, p0, p1, AIG_EXOR ); + if ( pResult = Hop_TableLookup( p, pGhost ) ) + return pResult; + return Hop_ObjCreate( p, pGhost ); +*/ + return Hop_Or( p, Hop_And(p, p0, Hop_Not(p1)), Hop_And(p, Hop_Not(p0), p1) ); +} + +/**Function************************************************************* + + Synopsis [Implements Boolean OR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Or( Hop_Man_t * p, Hop_Obj_t * p0, Hop_Obj_t * p1 ) +{ + return Hop_Not( Hop_And( p, Hop_Not(p0), Hop_Not(p1) ) ); +} + +/**Function************************************************************* + + Synopsis [Implements ITE operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Mux( Hop_Man_t * p, Hop_Obj_t * pC, Hop_Obj_t * p1, Hop_Obj_t * p0 ) +{ +/* + Hop_Obj_t * pTempA1, * pTempA2, * pTempB1, * pTempB2, * pTemp; + int Count0, Count1; + // consider trivial cases + if ( p0 == Hop_Not(p1) ) + return Hop_Exor( p, pC, p0 ); + // other cases can be added + // implement the first MUX (F = C * x1 + C' * x0) + + // check for constants here!!! + + pTempA1 = Hop_TableLookup( p, Hop_ObjCreateGhost(p, pC, p1, AIG_AND) ); + pTempA2 = Hop_TableLookup( p, Hop_ObjCreateGhost(p, Hop_Not(pC), p0, AIG_AND) ); + if ( pTempA1 && pTempA2 ) + { + pTemp = Hop_TableLookup( p, Hop_ObjCreateGhost(p, Hop_Not(pTempA1), Hop_Not(pTempA2), AIG_AND) ); + if ( pTemp ) return Hop_Not(pTemp); + } + Count0 = (pTempA1 != NULL) + (pTempA2 != NULL); + // implement the second MUX (F' = C * x1' + C' * x0') + pTempB1 = Hop_TableLookup( p, Hop_ObjCreateGhost(p, pC, Hop_Not(p1), AIG_AND) ); + pTempB2 = Hop_TableLookup( p, Hop_ObjCreateGhost(p, Hop_Not(pC), Hop_Not(p0), AIG_AND) ); + if ( pTempB1 && pTempB2 ) + { + pTemp = Hop_TableLookup( p, Hop_ObjCreateGhost(p, Hop_Not(pTempB1), Hop_Not(pTempB2), AIG_AND) ); + if ( pTemp ) return pTemp; + } + Count1 = (pTempB1 != NULL) + (pTempB2 != NULL); + // compare and decide which one to implement + if ( Count0 >= Count1 ) + { + pTempA1 = pTempA1? pTempA1 : Hop_And(p, pC, p1); + pTempA2 = pTempA2? pTempA2 : Hop_And(p, Hop_Not(pC), p0); + return Hop_Or( p, pTempA1, pTempA2 ); + } + pTempB1 = pTempB1? pTempB1 : Hop_And(p, pC, Hop_Not(p1)); + pTempB2 = pTempB2? pTempB2 : Hop_And(p, Hop_Not(pC), Hop_Not(p0)); + return Hop_Not( Hop_Or( p, pTempB1, pTempB2 ) ); +*/ + return Hop_Or( p, Hop_And(p, pC, p1), Hop_And(p, Hop_Not(pC), p0) ); +} + +/**Function************************************************************* + + Synopsis [Implements ITE operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Maj( Hop_Man_t * p, Hop_Obj_t * pA, Hop_Obj_t * pB, Hop_Obj_t * pC ) +{ + return Hop_Or( p, Hop_Or(p, Hop_And(p, pA, pB), Hop_And(p, pA, pC)), Hop_And(p, pB, pC) ); +} + +/**Function************************************************************* + + Synopsis [Constructs the well-balanced tree of gates.] + + Description [Disregards levels and possible logic sharing.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Multi_rec( Hop_Man_t * p, Hop_Obj_t ** ppObjs, int nObjs, Hop_Type_t Type ) +{ + Hop_Obj_t * pObj1, * pObj2; + if ( nObjs == 1 ) + return ppObjs[0]; + pObj1 = Hop_Multi_rec( p, ppObjs, nObjs/2, Type ); + pObj2 = Hop_Multi_rec( p, ppObjs + nObjs/2, nObjs - nObjs/2, Type ); + return Hop_Oper( p, pObj1, pObj2, Type ); +} + +/**Function************************************************************* + + Synopsis [Old code.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Multi( Hop_Man_t * p, Hop_Obj_t ** pArgs, int nArgs, Hop_Type_t Type ) +{ + assert( Type == AIG_AND || Type == AIG_EXOR ); + assert( nArgs > 0 ); + return Hop_Multi_rec( p, pArgs, nArgs, Type ); +} + +/**Function************************************************************* + + Synopsis [Implements the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_Miter( Hop_Man_t * p, Vec_Ptr_t * vPairs ) +{ + int i; + assert( vPairs->nSize > 0 ); + assert( vPairs->nSize % 2 == 0 ); + // go through the cubes of the node's SOP + for ( i = 0; i < vPairs->nSize; i += 2 ) + vPairs->pArray[i/2] = Hop_Not( Hop_Exor( p, vPairs->pArray[i], vPairs->pArray[i+1] ) ); + vPairs->nSize = vPairs->nSize/2; + return Hop_Not( Hop_Multi_rec( p, (Hop_Obj_t **)vPairs->pArray, vPairs->nSize, AIG_AND ) ); +} + +/**Function************************************************************* + + Synopsis [Creates AND function with nVars inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_CreateAnd( Hop_Man_t * p, int nVars ) +{ + Hop_Obj_t * pFunc; + int i; + pFunc = Hop_ManConst1( p ); + for ( i = 0; i < nVars; i++ ) + pFunc = Hop_And( p, pFunc, Hop_IthVar(p, i) ); + return pFunc; +} + +/**Function************************************************************* + + Synopsis [Creates AND function with nVars inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_CreateOr( Hop_Man_t * p, int nVars ) +{ + Hop_Obj_t * pFunc; + int i; + pFunc = Hop_ManConst0( p ); + for ( i = 0; i < nVars; i++ ) + pFunc = Hop_Or( p, pFunc, Hop_IthVar(p, i) ); + return pFunc; +} + +/**Function************************************************************* + + Synopsis [Creates AND function with nVars inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_CreateExor( Hop_Man_t * p, int nVars ) +{ + Hop_Obj_t * pFunc; + int i; + pFunc = Hop_ManConst0( p ); + for ( i = 0; i < nVars; i++ ) + pFunc = Hop_Exor( p, pFunc, Hop_IthVar(p, i) ); + return pFunc; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopTable.c b/src/aig/hop/hopTable.c new file mode 100644 index 00000000..76390054 --- /dev/null +++ b/src/aig/hop/hopTable.c @@ -0,0 +1,262 @@ +/**CFile**************************************************************** + + FileName [hopTable.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [Structural hashing table.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006. ] + + Revision [$Id: hopTable.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// hashing the node +static unsigned long Hop_Hash( Hop_Obj_t * pObj, int TableSize ) +{ + unsigned long Key = Hop_ObjIsExor(pObj) * 1699; + Key ^= Hop_ObjFanin0(pObj)->Id * 7937; + Key ^= Hop_ObjFanin1(pObj)->Id * 2971; + Key ^= Hop_ObjFaninC0(pObj) * 911; + Key ^= Hop_ObjFaninC1(pObj) * 353; + return Key % TableSize; +} + +// returns the place where this node is stored (or should be stored) +static Hop_Obj_t ** Hop_TableFind( Hop_Man_t * p, Hop_Obj_t * pObj ) +{ + Hop_Obj_t ** ppEntry; + assert( Hop_ObjChild0(pObj) && Hop_ObjChild1(pObj) ); + assert( Hop_ObjFanin0(pObj)->Id < Hop_ObjFanin1(pObj)->Id ); + for ( ppEntry = p->pTable + Hop_Hash(pObj, p->nTableSize); *ppEntry; ppEntry = &(*ppEntry)->pNext ) + if ( *ppEntry == pObj ) + return ppEntry; + assert( *ppEntry == NULL ); + return ppEntry; +} + +static void Hop_TableResize( Hop_Man_t * p ); +static unsigned int Cudd_PrimeAig( unsigned int p ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Checks if a node with the given attributes is in the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_TableLookup( Hop_Man_t * p, Hop_Obj_t * pGhost ) +{ + Hop_Obj_t * pEntry; + assert( !Hop_IsComplement(pGhost) ); + assert( Hop_ObjChild0(pGhost) && Hop_ObjChild1(pGhost) ); + assert( Hop_ObjFanin0(pGhost)->Id < Hop_ObjFanin1(pGhost)->Id ); + if ( p->fRefCount && (!Hop_ObjRefs(Hop_ObjFanin0(pGhost)) || !Hop_ObjRefs(Hop_ObjFanin1(pGhost))) ) + return NULL; + for ( pEntry = p->pTable[Hop_Hash(pGhost, p->nTableSize)]; pEntry; pEntry = pEntry->pNext ) + { + if ( Hop_ObjChild0(pEntry) == Hop_ObjChild0(pGhost) && + Hop_ObjChild1(pEntry) == Hop_ObjChild1(pGhost) && + Hop_ObjType(pEntry) == Hop_ObjType(pGhost) ) + return pEntry; + } + return NULL; +} + +/**Function************************************************************* + + Synopsis [Adds the new node to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_TableInsert( Hop_Man_t * p, Hop_Obj_t * pObj ) +{ + Hop_Obj_t ** ppPlace; + assert( !Hop_IsComplement(pObj) ); + assert( Hop_TableLookup(p, pObj) == NULL ); + if ( (pObj->Id & 0xFF) == 0 && 2 * p->nTableSize < Hop_ManNodeNum(p) ) + Hop_TableResize( p ); + ppPlace = Hop_TableFind( p, pObj ); + assert( *ppPlace == NULL ); + *ppPlace = pObj; +} + +/**Function************************************************************* + + Synopsis [Deletes the node from the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_TableDelete( Hop_Man_t * p, Hop_Obj_t * pObj ) +{ + Hop_Obj_t ** ppPlace; + assert( !Hop_IsComplement(pObj) ); + ppPlace = Hop_TableFind( p, pObj ); + assert( *ppPlace == pObj ); // node should be in the table + // remove the node + *ppPlace = pObj->pNext; + pObj->pNext = NULL; +} + +/**Function************************************************************* + + Synopsis [Count the number of nodes in the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_TableCountEntries( Hop_Man_t * p ) +{ + Hop_Obj_t * pEntry; + int i, Counter = 0; + for ( i = 0; i < p->nTableSize; i++ ) + for ( pEntry = p->pTable[i]; pEntry; pEntry = pEntry->pNext ) + Counter++; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Resizes the table.] + + Description [Typically this procedure should not be called.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_TableResize( Hop_Man_t * p ) +{ + Hop_Obj_t * pEntry, * pNext; + Hop_Obj_t ** pTableOld, ** ppPlace; + int nTableSizeOld, Counter, nEntries, i, clk; +clk = clock(); + // save the old table + pTableOld = p->pTable; + nTableSizeOld = p->nTableSize; + // get the new table + p->nTableSize = Cudd_PrimeAig( 2 * Hop_ManNodeNum(p) ); + p->pTable = ALLOC( Hop_Obj_t *, p->nTableSize ); + memset( p->pTable, 0, sizeof(Hop_Obj_t *) * p->nTableSize ); + // rehash the entries from the old table + Counter = 0; + for ( i = 0; i < nTableSizeOld; i++ ) + for ( pEntry = pTableOld[i], pNext = pEntry? pEntry->pNext : NULL; pEntry; pEntry = pNext, pNext = pEntry? pEntry->pNext : NULL ) + { + // get the place where this entry goes in the table + ppPlace = Hop_TableFind( p, pEntry ); + assert( *ppPlace == NULL ); // should not be there + // add the entry to the list + *ppPlace = pEntry; + pEntry->pNext = NULL; + Counter++; + } + nEntries = Hop_ManNodeNum(p); + assert( Counter == nEntries ); +// printf( "Increasing the structural table size from %6d to %6d. ", nTableSizeOld, p->nTableSize ); +// PRT( "Time", clock() - clk ); + // replace the table and the parameters + free( pTableOld ); +} + +/**Function******************************************************************** + + Synopsis [Profiles the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Hop_TableProfile( Hop_Man_t * p ) +{ + Hop_Obj_t * pEntry; + int i, Counter; + for ( i = 0; i < p->nTableSize; i++ ) + { + Counter = 0; + for ( pEntry = p->pTable[i]; pEntry; pEntry = pEntry->pNext ) + Counter++; + if ( Counter ) + printf( "%d ", Counter ); + } +} + +/**Function******************************************************************** + + Synopsis [Returns the next prime >= p.] + + Description [Copied from CUDD, for stand-aloneness.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +unsigned int Cudd_PrimeAig( unsigned int p) +{ + int i,pn; + p--; + do { + p++; + if (p&1) { + pn = 1; + i = 3; + while ((unsigned) (i * i) <= p) { + if (p % i == 0) { + pn = 0; + break; + } + i += 2; + } + } else { + pn = 0; + } + } while (!pn); + return(p); + +} /* end of Cudd_Prime */ + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hopUtil.c b/src/aig/hop/hopUtil.c new file mode 100644 index 00000000..87fdb15e --- /dev/null +++ b/src/aig/hop/hopUtil.c @@ -0,0 +1,572 @@ +/**CFile**************************************************************** + + FileName [hopUtil.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Various procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: hopUtil.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Increments the current traversal ID of the network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManIncrementTravId( Hop_Man_t * p ) +{ + if ( p->nTravIds >= (1<<30)-1 ) + Hop_ManCleanData( p ); + p->nTravIds++; +} + +/**Function************************************************************* + + Synopsis [Cleans the data pointers for the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManCleanData( Hop_Man_t * p ) +{ + Hop_Obj_t * pObj; + int i; + p->nTravIds = 1; + Hop_ManConst1(p)->pData = NULL; + Hop_ManForEachPi( p, pObj, i ) + pObj->pData = NULL; + Hop_ManForEachPo( p, pObj, i ) + pObj->pData = NULL; + Hop_ManForEachNode( p, pObj, i ) + pObj->pData = NULL; +} + +/**Function************************************************************* + + Synopsis [Recursively cleans the data pointers in the cone of the node.] + + Description [Applicable to small AIGs only because no caching is performed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjCleanData_rec( Hop_Obj_t * pObj ) +{ + assert( !Hop_IsComplement(pObj) ); + assert( !Hop_ObjIsPo(pObj) ); + if ( Hop_ObjIsAnd(pObj) ) + { + Hop_ObjCleanData_rec( Hop_ObjFanin0(pObj) ); + Hop_ObjCleanData_rec( Hop_ObjFanin1(pObj) ); + } + pObj->pData = NULL; +} + +/**Function************************************************************* + + Synopsis [Detects multi-input gate rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjCollectMulti_rec( Hop_Obj_t * pRoot, Hop_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + if ( pRoot != pObj && (Hop_IsComplement(pObj) || Hop_ObjIsPi(pObj) || Hop_ObjType(pRoot) != Hop_ObjType(pObj)) ) + { + Vec_PtrPushUnique(vSuper, pObj); + return; + } + Hop_ObjCollectMulti_rec( pRoot, Hop_ObjChild0(pObj), vSuper ); + Hop_ObjCollectMulti_rec( pRoot, Hop_ObjChild1(pObj), vSuper ); +} + +/**Function************************************************************* + + Synopsis [Detects multi-input gate rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjCollectMulti( Hop_Obj_t * pRoot, Vec_Ptr_t * vSuper ) +{ + assert( !Hop_IsComplement(pRoot) ); + Vec_PtrClear( vSuper ); + Hop_ObjCollectMulti_rec( pRoot, pRoot, vSuper ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the node is the root of MUX or EXOR/NEXOR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_ObjIsMuxType( Hop_Obj_t * pNode ) +{ + Hop_Obj_t * pNode0, * pNode1; + // check that the node is regular + assert( !Hop_IsComplement(pNode) ); + // if the node is not AND, this is not MUX + if ( !Hop_ObjIsAnd(pNode) ) + return 0; + // if the children are not complemented, this is not MUX + if ( !Hop_ObjFaninC0(pNode) || !Hop_ObjFaninC1(pNode) ) + return 0; + // get children + pNode0 = Hop_ObjFanin0(pNode); + pNode1 = Hop_ObjFanin1(pNode); + // if the children are not ANDs, this is not MUX + if ( !Hop_ObjIsAnd(pNode0) || !Hop_ObjIsAnd(pNode1) ) + return 0; + // otherwise the node is MUX iff it has a pair of equal grandchildren + return (Hop_ObjFanin0(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC0(pNode1))) || + (Hop_ObjFanin0(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC1(pNode1))) || + (Hop_ObjFanin1(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC0(pNode1))) || + (Hop_ObjFanin1(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC1(pNode1))); +} + + +/**Function************************************************************* + + Synopsis [Recognizes what nodes are inputs of the EXOR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Hop_ObjRecognizeExor( Hop_Obj_t * pObj, Hop_Obj_t ** ppFan0, Hop_Obj_t ** ppFan1 ) +{ + Hop_Obj_t * p0, * p1; + assert( !Hop_IsComplement(pObj) ); + if ( !Hop_ObjIsNode(pObj) ) + return 0; + if ( Hop_ObjIsExor(pObj) ) + { + *ppFan0 = Hop_ObjChild0(pObj); + *ppFan1 = Hop_ObjChild1(pObj); + return 1; + } + assert( Hop_ObjIsAnd(pObj) ); + p0 = Hop_ObjChild0(pObj); + p1 = Hop_ObjChild1(pObj); + if ( !Hop_IsComplement(p0) || !Hop_IsComplement(p1) ) + return 0; + p0 = Hop_Regular(p0); + p1 = Hop_Regular(p1); + if ( !Hop_ObjIsAnd(p0) || !Hop_ObjIsAnd(p1) ) + return 0; + if ( Hop_ObjFanin0(p0) != Hop_ObjFanin0(p1) || Hop_ObjFanin1(p0) != Hop_ObjFanin1(p1) ) + return 0; + if ( Hop_ObjFaninC0(p0) == Hop_ObjFaninC0(p1) || Hop_ObjFaninC1(p0) == Hop_ObjFaninC1(p1) ) + return 0; + *ppFan0 = Hop_ObjChild0(p0); + *ppFan1 = Hop_ObjChild1(p0); + return 1; +} + +/**Function************************************************************* + + Synopsis [Recognizes what nodes are control and data inputs of a MUX.] + + Description [If the node is a MUX, returns the control variable C. + Assigns nodes T and E to be the then and else variables of the MUX. + Node C is never complemented. Nodes T and E can be complemented. + This function also recognizes EXOR/NEXOR gates as MUXes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Hop_ObjRecognizeMux( Hop_Obj_t * pNode, Hop_Obj_t ** ppNodeT, Hop_Obj_t ** ppNodeE ) +{ + Hop_Obj_t * pNode0, * pNode1; + assert( !Hop_IsComplement(pNode) ); + assert( Hop_ObjIsMuxType(pNode) ); + // get children + pNode0 = Hop_ObjFanin0(pNode); + pNode1 = Hop_ObjFanin1(pNode); + + // find the control variable + if ( Hop_ObjFanin1(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC1(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p2) ) + if ( Hop_ObjFaninC1(pNode0) ) + { // pNode2->p2 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1); + *ppNodeE = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1); + return Hop_ObjChild1(pNode1);//pNode2->p2; + } + else + { // pNode1->p2 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1); + *ppNodeE = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1); + return Hop_ObjChild1(pNode0);//pNode1->p2; + } + } + else if ( Hop_ObjFanin0(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC0(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p1) ) + if ( Hop_ObjFaninC0(pNode0) ) + { // pNode2->p1 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2); + *ppNodeE = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2); + return Hop_ObjChild0(pNode1);//pNode2->p1; + } + else + { // pNode1->p1 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2); + *ppNodeE = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2); + return Hop_ObjChild0(pNode0);//pNode1->p1; + } + } + else if ( Hop_ObjFanin0(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC1(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p1) ) + if ( Hop_ObjFaninC0(pNode0) ) + { // pNode2->p2 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1); + *ppNodeE = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2); + return Hop_ObjChild1(pNode1);//pNode2->p2; + } + else + { // pNode1->p1 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2); + *ppNodeE = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1); + return Hop_ObjChild0(pNode0);//pNode1->p1; + } + } + else if ( Hop_ObjFanin1(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC0(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p2) ) + if ( Hop_ObjFaninC1(pNode0) ) + { // pNode2->p1 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2); + *ppNodeE = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1); + return Hop_ObjChild0(pNode1);//pNode2->p1; + } + else + { // pNode1->p2 is positive phase of C + *ppNodeT = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1); + *ppNodeE = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2); + return Hop_ObjChild1(pNode0);//pNode1->p2; + } + } + assert( 0 ); // this is not MUX + return NULL; +} + + +/**Function************************************************************* + + Synopsis [Prints Eqn formula for the AIG rooted at this node.] + + Description [The formula is in terms of PIs, which should have + their names assigned in pObj->pData fields.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjPrintEqn( FILE * pFile, Hop_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ) +{ + Vec_Ptr_t * vSuper; + Hop_Obj_t * pFanin; + int fCompl, i; + // store the complemented attribute + fCompl = Hop_IsComplement(pObj); + pObj = Hop_Regular(pObj); + // constant case + if ( Hop_ObjIsConst1(pObj) ) + { + fprintf( pFile, "%d", !fCompl ); + return; + } + // PI case + if ( Hop_ObjIsPi(pObj) ) + { + fprintf( pFile, "%s%s", fCompl? "!" : "", pObj->pData ); + return; + } + // AND case + Vec_VecExpand( vLevels, Level ); + vSuper = Vec_VecEntry(vLevels, Level); + Hop_ObjCollectMulti( pObj, vSuper ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + Hop_ObjPrintEqn( pFile, Hop_NotCond(pFanin, fCompl), vLevels, Level+1 ); + if ( i < Vec_PtrSize(vSuper) - 1 ) + fprintf( pFile, " %s ", fCompl? "+" : "*" ); + } + fprintf( pFile, "%s", (Level==0? "" : ")") ); + return; +} + +/**Function************************************************************* + + Synopsis [Prints Verilog formula for the AIG rooted at this node.] + + Description [The formula is in terms of PIs, which should have + their names assigned in pObj->pData fields.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjPrintVerilog( FILE * pFile, Hop_Obj_t * pObj, Vec_Vec_t * vLevels, int Level ) +{ + Vec_Ptr_t * vSuper; + Hop_Obj_t * pFanin, * pFanin0, * pFanin1, * pFaninC; + int fCompl, i; + // store the complemented attribute + fCompl = Hop_IsComplement(pObj); + pObj = Hop_Regular(pObj); + // constant case + if ( Hop_ObjIsConst1(pObj) ) + { + fprintf( pFile, "1\'b%d", !fCompl ); + return; + } + // PI case + if ( Hop_ObjIsPi(pObj) ) + { + fprintf( pFile, "%s%s", fCompl? "~" : "", pObj->pData ); + return; + } + // EXOR case + if ( Hop_ObjIsExor(pObj) ) + { + Vec_VecExpand( vLevels, Level ); + vSuper = Vec_VecEntry( vLevels, Level ); + Hop_ObjCollectMulti( pObj, vSuper ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin, (fCompl && i==0)), vLevels, Level+1 ); + if ( i < Vec_PtrSize(vSuper) - 1 ) + fprintf( pFile, " ^ " ); + } + fprintf( pFile, "%s", (Level==0? "" : ")") ); + return; + } + // MUX case + if ( Hop_ObjIsMuxType(pObj) ) + { + if ( Hop_ObjRecognizeExor( pObj, &pFanin0, &pFanin1 ) ) + { + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin0, fCompl), vLevels, Level+1 ); + fprintf( pFile, " ^ " ); + Hop_ObjPrintVerilog( pFile, pFanin1, vLevels, Level+1 ); + fprintf( pFile, "%s", (Level==0? "" : ")") ); + } + else + { + pFaninC = Hop_ObjRecognizeMux( pObj, &pFanin1, &pFanin0 ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Hop_ObjPrintVerilog( pFile, pFaninC, vLevels, Level+1 ); + fprintf( pFile, " ? " ); + Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin1, fCompl), vLevels, Level+1 ); + fprintf( pFile, " : " ); + Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin0, fCompl), vLevels, Level+1 ); + fprintf( pFile, "%s", (Level==0? "" : ")") ); + } + return; + } + // AND case + Vec_VecExpand( vLevels, Level ); + vSuper = Vec_VecEntry(vLevels, Level); + Hop_ObjCollectMulti( pObj, vSuper ); + fprintf( pFile, "%s", (Level==0? "" : "(") ); + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin, fCompl), vLevels, Level+1 ); + if ( i < Vec_PtrSize(vSuper) - 1 ) + fprintf( pFile, " %s ", fCompl? "|" : "&" ); + } + fprintf( pFile, "%s", (Level==0? "" : ")") ); + return; +} + + +/**Function************************************************************* + + Synopsis [Prints node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ObjPrintVerbose( Hop_Obj_t * pObj, int fHaig ) +{ + assert( !Hop_IsComplement(pObj) ); + printf( "Node %p : ", pObj ); + if ( Hop_ObjIsConst1(pObj) ) + printf( "constant 1" ); + else if ( Hop_ObjIsPi(pObj) ) + printf( "PI" ); + else + printf( "AND( %p%s, %p%s )", + Hop_ObjFanin0(pObj), (Hop_ObjFaninC0(pObj)? "\'" : " "), + Hop_ObjFanin1(pObj), (Hop_ObjFaninC1(pObj)? "\'" : " ") ); + printf( " (refs = %3d)", Hop_ObjRefs(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Prints node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManPrintVerbose( Hop_Man_t * p, int fHaig ) +{ + Vec_Ptr_t * vNodes; + Hop_Obj_t * pObj; + int i; + printf( "PIs: " ); + Hop_ManForEachPi( p, pObj, i ) + printf( " %p", pObj ); + printf( "\n" ); + vNodes = Hop_ManDfs( p ); + Vec_PtrForEachEntry( vNodes, pObj, i ) + Hop_ObjPrintVerbose( pObj, fHaig ), printf( "\n" ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Writes the AIG into the BLIF file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Hop_ManDumpBlif( Hop_Man_t * p, char * pFileName ) +{ + FILE * pFile; + Vec_Ptr_t * vNodes; + Hop_Obj_t * pObj, * pConst1 = NULL; + int i, nDigits, Counter = 0; + if ( Hop_ManPoNum(p) == 0 ) + { + printf( "Hop_ManDumpBlif(): AIG manager does not have POs.\n" ); + return; + } + // collect nodes in the DFS order + vNodes = Hop_ManDfs( p ); + // assign IDs to objects + Hop_ManConst1(p)->pData = (void *)Counter++; + Hop_ManForEachPi( p, pObj, i ) + pObj->pData = (void *)Counter++; + Hop_ManForEachPo( p, pObj, i ) + pObj->pData = (void *)Counter++; + Vec_PtrForEachEntry( vNodes, pObj, i ) + pObj->pData = (void *)Counter++; + nDigits = Hop_Base10Log( Counter ); + // write the file + pFile = fopen( pFileName, "w" ); + fprintf( pFile, "# BLIF file written by procedure Hop_ManDumpBlif() in ABC\n" ); + fprintf( pFile, "# http://www.eecs.berkeley.edu/~alanmi/abc/\n" ); + fprintf( pFile, ".model test\n" ); + // write PIs + fprintf( pFile, ".inputs" ); + Hop_ManForEachPi( p, pObj, i ) + fprintf( pFile, " n%0*d", nDigits, (int)pObj->pData ); + fprintf( pFile, "\n" ); + // write POs + fprintf( pFile, ".outputs" ); + Hop_ManForEachPo( p, pObj, i ) + fprintf( pFile, " n%0*d", nDigits, (int)pObj->pData ); + fprintf( pFile, "\n" ); + // write nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + fprintf( pFile, ".names n%0*d n%0*d n%0*d\n", + nDigits, (int)Hop_ObjFanin0(pObj)->pData, + nDigits, (int)Hop_ObjFanin1(pObj)->pData, + nDigits, (int)pObj->pData ); + fprintf( pFile, "%d%d 1\n", !Hop_ObjFaninC0(pObj), !Hop_ObjFaninC1(pObj) ); + } + // write POs + Hop_ManForEachPo( p, pObj, i ) + { + fprintf( pFile, ".names n%0*d n%0*d\n", + nDigits, (int)Hop_ObjFanin0(pObj)->pData, + nDigits, (int)pObj->pData ); + fprintf( pFile, "%d 1\n", !Hop_ObjFaninC0(pObj) ); + if ( Hop_ObjIsConst1(Hop_ObjFanin0(pObj)) ) + pConst1 = Hop_ManConst1(p); + } + if ( pConst1 ) + fprintf( pFile, ".names n%0*d\n 1\n", nDigits, (int)pConst1->pData ); + fprintf( pFile, ".end\n\n" ); + fclose( pFile ); + Vec_PtrFree( vNodes ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/hop_.c b/src/aig/hop/hop_.c new file mode 100644 index 00000000..468413fa --- /dev/null +++ b/src/aig/hop/hop_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [ivy_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Minimalistic And-Inverter Graph package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivy_.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/hop/module.make b/src/aig/hop/module.make new file mode 100644 index 00000000..b06d91fd --- /dev/null +++ b/src/aig/hop/module.make @@ -0,0 +1,9 @@ +SRC += src/aig/hop/hopBalance.c \ + src/aig/hop/hopCheck.c \ + src/aig/hop/hopDfs.c \ + src/aig/hop/hopMan.c \ + src/aig/hop/hopMem.c \ + src/aig/hop/hopObj.c \ + src/aig/hop/hopOper.c \ + src/aig/hop/hopTable.c \ + src/aig/hop/hopUtil.c diff --git a/src/aig/ioa/ioa.h b/src/aig/ioa/ioa.h new file mode 100644 index 00000000..3458d12e --- /dev/null +++ b/src/aig/ioa/ioa.h @@ -0,0 +1,80 @@ +/**CFile**************************************************************** + + FileName [ioa.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$Id: ioa.h,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __IOA_H__ +#define __IOA_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> + +#include "vec.h" +#include "bar.h" +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== ioaReadAig.c ========================================================*/ +extern Aig_Man_t * Ioa_ReadAiger( char * pFileName, int fCheck ); +/*=== ioaWriteAig.c =======================================================*/ +extern void Ioa_WriteAiger( Aig_Man_t * pMan, char * pFileName, int fWriteSymbols ); +/*=== ioaUtil.c =======================================================*/ +extern int Ioa_FileSize( char * pFileName ); +extern char * Ioa_FileNameGeneric( char * FileName ); +extern char * Ioa_TimeStamp(); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/ioa/ioaReadAig.c b/src/aig/ioa/ioaReadAig.c new file mode 100644 index 00000000..937e446f --- /dev/null +++ b/src/aig/ioa/ioaReadAig.c @@ -0,0 +1,312 @@ +/**CFile**************************************************************** + + FileName [ioaReadAiger.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Command processing package.] + + Synopsis [Procedures to read binary AIGER format developed by + Armin Biere, Johannes Kepler University (http://fmv.jku.at/)] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - December 16, 2006.] + + Revision [$Id: ioaReadAiger.c,v 1.00 2006/12/16 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ioa.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +unsigned Ioa_ReadAigerDecode( char ** ppPos ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Reads the AIG in the binary AIGER format.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Ioa_ReadAiger( char * pFileName, int fCheck ) +{ + Bar_Progress_t * pProgress; + FILE * pFile; + Vec_Ptr_t * vNodes, * vDrivers;//, * vTerms; + Aig_Obj_t * pObj, * pNode0, * pNode1; + Aig_Man_t * pManNew; + int nTotal, nInputs, nOutputs, nLatches, nAnds, nFileSize, i;//, iTerm, nDigits; + char * pContents, * pDrivers, * pSymbols, * pCur, * pName;//, * pType; + unsigned uLit0, uLit1, uLit; + + // read the file into the buffer + nFileSize = Ioa_FileSize( pFileName ); + pFile = fopen( pFileName, "rb" ); + pContents = ALLOC( char, nFileSize ); + fread( pContents, nFileSize, 1, pFile ); + fclose( pFile ); + + // check if the input file format is correct + if ( strncmp(pContents, "aig", 3) != 0 ) + { + fprintf( stdout, "Wrong input file format.\n" ); + return NULL; + } + + // read the file type + pCur = pContents; while ( *pCur++ != ' ' ); + // read the number of objects + nTotal = atoi( pCur ); while ( *pCur++ != ' ' ); + // read the number of inputs + nInputs = atoi( pCur ); while ( *pCur++ != ' ' ); + // read the number of latches + nLatches = atoi( pCur ); while ( *pCur++ != ' ' ); + // read the number of outputs + nOutputs = atoi( pCur ); while ( *pCur++ != ' ' ); + // read the number of nodes + nAnds = atoi( pCur ); while ( *pCur++ != '\n' ); + // check the parameters + if ( nTotal != nInputs + nLatches + nAnds ) + { + fprintf( stdout, "The paramters are wrong.\n" ); + return NULL; + } + + // allocate the empty AIG + pManNew = Aig_ManStart( nAnds ); + pName = Ioa_FileNameGeneric( pFileName ); + pManNew->pName = Aig_UtilStrsav( pName ); +// pManNew->pSpec = Ioa_UtilStrsav( pFileName ); + free( pName ); + + // prepare the array of nodes + vNodes = Vec_PtrAlloc( 1 + nInputs + nLatches + nAnds ); + Vec_PtrPush( vNodes, Aig_ManConst0(pManNew) ); + + // create the PIs + for ( i = 0; i < nInputs + nLatches; i++ ) + { + pObj = Aig_ObjCreatePi(pManNew); + Vec_PtrPush( vNodes, pObj ); + } +/* + // create the POs + for ( i = 0; i < nOutputs + nLatches; i++ ) + { + pObj = Aig_ObjCreatePo(pManNew); + } +*/ + // create the latches + pManNew->nRegs = nLatches; +/* + nDigits = Ioa_Base10Log( nLatches ); + for ( i = 0; i < nLatches; i++ ) + { + pObj = Aig_ObjCreateLatch(pManNew); + Aig_LatchSetInit0( pObj ); + pNode0 = Aig_ObjCreateBi(pManNew); + pNode1 = Aig_ObjCreateBo(pManNew); + Aig_ObjAddFanin( pObj, pNode0 ); + Aig_ObjAddFanin( pNode1, pObj ); + Vec_PtrPush( vNodes, pNode1 ); + // assign names to latch and its input +// Aig_ObjAssignName( pObj, Aig_ObjNameDummy("_L", i, nDigits), NULL ); +// printf( "Creating latch %s with input %d and output %d.\n", Aig_ObjName(pObj), pNode0->Id, pNode1->Id ); + } +*/ + + // remember the beginning of latch/PO literals + pDrivers = pCur; + + // scroll to the beginning of the binary data + for ( i = 0; i < nLatches + nOutputs; ) + if ( *pCur++ == '\n' ) + i++; + + // create the AND gates + pProgress = Bar_ProgressStart( stdout, nAnds ); + for ( i = 0; i < nAnds; i++ ) + { + Bar_ProgressUpdate( pProgress, i, NULL ); + uLit = ((i + 1 + nInputs + nLatches) << 1); + uLit1 = uLit - Ioa_ReadAigerDecode( &pCur ); + uLit0 = uLit1 - Ioa_ReadAigerDecode( &pCur ); +// assert( uLit1 > uLit0 ); + pNode0 = Aig_NotCond( Vec_PtrEntry(vNodes, uLit0 >> 1), uLit0 & 1 ); + pNode1 = Aig_NotCond( Vec_PtrEntry(vNodes, uLit1 >> 1), uLit1 & 1 ); + assert( Vec_PtrSize(vNodes) == i + 1 + nInputs + nLatches ); + Vec_PtrPush( vNodes, Aig_And(pManNew, pNode0, pNode1) ); + } + Bar_ProgressStop( pProgress ); + + // remember the place where symbols begin + pSymbols = pCur; + + // read the latch driver literals + vDrivers = Vec_PtrAlloc( nLatches + nOutputs ); + pCur = pDrivers; +// Aig_ManForEachLatchInput( pManNew, pObj, i ) + for ( i = 0; i < nLatches; i++ ) + { + uLit0 = atoi( pCur ); while ( *pCur++ != '\n' ); + pNode0 = Aig_NotCond( Vec_PtrEntry(vNodes, uLit0 >> 1), (uLit0 & 1) );//^ (uLit0 < 2) ); +// Aig_ObjAddFanin( pObj, pNode0 ); + Vec_PtrPush( vDrivers, pNode0 ); + } + // read the PO driver literals +// Aig_ManForEachPo( pManNew, pObj, i ) + for ( i = 0; i < nOutputs; i++ ) + { + uLit0 = atoi( pCur ); while ( *pCur++ != '\n' ); + pNode0 = Aig_NotCond( Vec_PtrEntry(vNodes, uLit0 >> 1), (uLit0 & 1) );//^ (uLit0 < 2) ); +// Aig_ObjAddFanin( pObj, pNode0 ); + Vec_PtrPush( vDrivers, pNode0 ); + } + + + // create the POs + for ( i = 0; i < nOutputs; i++ ) + Aig_ObjCreatePo( pManNew, Vec_PtrEntry(vDrivers, nLatches + i) ); + for ( i = 0; i < nLatches; i++ ) + Aig_ObjCreatePo( pManNew, Vec_PtrEntry(vDrivers, i) ); + Vec_PtrFree( vDrivers ); + +/* + // read the names if present + pCur = pSymbols; + if ( *pCur != 'c' ) + { + int Counter = 0; + while ( pCur < pContents + nFileSize && *pCur != 'c' ) + { + // get the terminal type + pType = pCur; + if ( *pCur == 'i' ) + vTerms = pManNew->vPis; + else if ( *pCur == 'l' ) + vTerms = pManNew->vBoxes; + else if ( *pCur == 'o' ) + vTerms = pManNew->vPos; + else + { + fprintf( stdout, "Wrong terminal type.\n" ); + return NULL; + } + // get the terminal number + iTerm = atoi( ++pCur ); while ( *pCur++ != ' ' ); + // get the node + if ( iTerm >= Vec_PtrSize(vTerms) ) + { + fprintf( stdout, "The number of terminal is out of bound.\n" ); + return NULL; + } + pObj = Vec_PtrEntry( vTerms, iTerm ); + if ( *pType == 'l' ) + pObj = Aig_ObjFanout0(pObj); + // assign the name + pName = pCur; while ( *pCur++ != '\n' ); + // assign this name + *(pCur-1) = 0; + Aig_ObjAssignName( pObj, pName, NULL ); + if ( *pType == 'l' ) + { + Aig_ObjAssignName( Aig_ObjFanin0(pObj), Aig_ObjName(pObj), "L" ); + Aig_ObjAssignName( Aig_ObjFanin0(Aig_ObjFanin0(pObj)), Aig_ObjName(pObj), "_in" ); + } + // mark the node as named + pObj->pCopy = (Aig_Obj_t *)Aig_ObjName(pObj); + } + + // assign the remaining names + Aig_ManForEachPi( pManNew, pObj, i ) + { + if ( pObj->pCopy ) continue; + Aig_ObjAssignName( pObj, Aig_ObjName(pObj), NULL ); + Counter++; + } + Aig_ManForEachLatchOutput( pManNew, pObj, i ) + { + if ( pObj->pCopy ) continue; + Aig_ObjAssignName( pObj, Aig_ObjName(pObj), NULL ); + Aig_ObjAssignName( Aig_ObjFanin0(pObj), Aig_ObjName(pObj), "L" ); + Aig_ObjAssignName( Aig_ObjFanin0(Aig_ObjFanin0(pObj)), Aig_ObjName(pObj), "_in" ); + Counter++; + } + Aig_ManForEachPo( pManNew, pObj, i ) + { + if ( pObj->pCopy ) continue; + Aig_ObjAssignName( pObj, Aig_ObjName(pObj), NULL ); + Counter++; + } + if ( Counter ) + printf( "Ioa_ReadAiger(): Added %d default names for nameless I/O/register objects.\n", Counter ); + } + else + { +// printf( "Ioa_ReadAiger(): I/O/register names are not given. Generating short names.\n" ); + Aig_ManShortNames( pManNew ); + } +*/ + + // skipping the comments + free( pContents ); + Vec_PtrFree( vNodes ); + + // remove the extra nodes + Aig_ManCleanup( pManNew ); + + // check the result + if ( fCheck && !Aig_ManCheck( pManNew ) ) + { + printf( "Ioa_ReadAiger: The network check has failed.\n" ); + Aig_ManStop( pManNew ); + return NULL; + } + return pManNew; +} + + +/**Function************************************************************* + + Synopsis [Extracts one unsigned AIG edge from the input buffer.] + + Description [This procedure is a slightly modified version of Armin Biere's + procedure "unsigned decode (FILE * file)". ] + + SideEffects [Updates the current reading position.] + + SeeAlso [] + +***********************************************************************/ +unsigned Ioa_ReadAigerDecode( char ** ppPos ) +{ + unsigned x = 0, i = 0; + unsigned char ch; + +// while ((ch = getnoneofch (file)) & 0x80) + while ((ch = *(*ppPos)++) & 0x80) + x |= (ch & 0x7f) << (7 * i++); + + return x | (ch << (7 * i)); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ioa/ioaUtil.c b/src/aig/ioa/ioaUtil.c new file mode 100644 index 00000000..79dcca1e --- /dev/null +++ b/src/aig/ioa/ioaUtil.c @@ -0,0 +1,117 @@ +/**CFile**************************************************************** + + FileName [ioaUtil.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Command processing package.] + + Synopsis [Procedures to read binary AIGER format developed by + Armin Biere, Johannes Kepler University (http://fmv.jku.at/)] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - December 16, 2006.] + + Revision [$Id: ioaUtil.c,v 1.00 2006/12/16 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ioa.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Returns the file size.] + + Description [The file should be closed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ioa_FileSize( char * pFileName ) +{ + FILE * pFile; + int nFileSize; + pFile = fopen( pFileName, "r" ); + if ( pFile == NULL ) + { + printf( "Ioa_FileSize(): The file is unavailable (absent or open).\n" ); + return 0; + } + fseek( pFile, 0, SEEK_END ); + nFileSize = ftell( pFile ); + fclose( pFile ); + return nFileSize; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Ioa_FileNameGeneric( char * FileName ) +{ + char * pDot; + char * pUnd; + char * pRes; + + // find the generic name of the file + pRes = Aig_UtilStrsav( FileName ); + // find the pointer to the "." symbol in the file name +// pUnd = strstr( FileName, "_" ); + pUnd = NULL; + pDot = strstr( FileName, "." ); + if ( pUnd ) + pRes[pUnd - FileName] = 0; + else if ( pDot ) + pRes[pDot - FileName] = 0; + return pRes; +} + +/**Function************************************************************* + + Synopsis [Returns the time stamp.] + + Description [The file should be closed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Ioa_TimeStamp() +{ + static char Buffer[100]; + char * TimeStamp; + time_t ltime; + // get the current time + time( <ime ); + TimeStamp = asctime( localtime( <ime ) ); + TimeStamp[ strlen(TimeStamp) - 1 ] = 0; + strcpy( Buffer, TimeStamp ); + return Buffer; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ioa/ioaWriteAig.c b/src/aig/ioa/ioaWriteAig.c new file mode 100644 index 00000000..a6c23fd4 --- /dev/null +++ b/src/aig/ioa/ioaWriteAig.c @@ -0,0 +1,292 @@ +/**CFile**************************************************************** + + FileName [ioaWriteAiger.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Command processing package.] + + Synopsis [Procedures to write binary AIGER format developed by + Armin Biere, Johannes Kepler University (http://fmv.jku.at/)] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - December 16, 2006.] + + Revision [$Id: ioaWriteAiger.c,v 1.00 2006/12/16 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ioa.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/* + The following is taken from the AIGER format description, + which can be found at http://fmv.jku.at/aiger +*/ + + +/* + The AIGER And-Inverter Graph (AIG) Format Version 20061129 + ---------------------------------------------------------- + Armin Biere, Johannes Kepler University, 2006 + + This report describes the AIG file format as used by the AIGER library. + The purpose of this report is not only to motivate and document the + format, but also to allow independent implementations of writers and + readers by giving precise and unambiguous definitions. + + ... + +Introduction + + The name AIGER contains as one part the acronym AIG of And-Inverter + Graphs and also if pronounced in German sounds like the name of the + 'Eiger', a mountain in the Swiss alps. This choice should emphasize the + origin of this format. It was first openly discussed at the Alpine + Verification Meeting 2006 in Ascona as a way to provide a simple, compact + file format for a model checking competition affiliated to CAV 2007. + + ... + +Binary Format Definition + + The binary format is semantically a subset of the ASCII format with a + slightly different syntax. The binary format may need to reencode + literals, but translating a file in binary format into ASCII format and + then back in to binary format will result in the same file. + + The main differences of the binary format to the ASCII format are as + follows. After the header the list of input literals and all the + current state literals of a latch can be omitted. Furthermore the + definitions of the AND gates are binary encoded. However, the symbol + table and the comment section are as in the ASCII format. + + The header of an AIGER file in binary format has 'aig' as format + identifier, but otherwise is identical to the ASCII header. The standard + file extension for the binary format is therefore '.aig'. + + A header for the binary format is still in ASCII encoding: + + aig M I L O A + + Constants, variables and literals are handled in the same way as in the + ASCII format. The first simplifying restriction is on the variable + indices of inputs and latches. The variable indices of inputs come first, + followed by the pseudo-primary inputs of the latches and then the variable + indices of all LHS of AND gates: + + input variable indices 1, 2, ... , I + latch variable indices I+1, I+2, ... , (I+L) + AND variable indices I+L+1, I+L+2, ... , (I+L+A) == M + + The corresponding unsigned literals are + + input literals 2, 4, ... , 2*I + latch literals 2*I+2, 2*I+4, ... , 2*(I+L) + AND literals 2*(I+L)+2, 2*(I+L)+4, ... , 2*(I+L+A) == 2*M + + All literals have to be defined, and therefore 'M = I + L + A'. With this + restriction it becomes possible that the inputs and the current state + literals of the latches do not have to be listed explicitly. Therefore, + after the header only the list of 'L' next state literals follows, one per + latch on a single line, and then the 'O' outputs, again one per line. + + In the binary format we assume that the AND gates are ordered and respect + the child parent relation. AND gates with smaller literals on the LHS + come first. Therefore we can assume that the literals on the right-hand + side of a definition of an AND gate are smaller than the LHS literal. + Furthermore we can sort the literals on the RHS, such that the larger + literal comes first. A definition thus consists of three literals + + lhs rhs0 rhs1 + + with 'lhs' even and 'lhs > rhs0 >= rhs1'. Also the variable indices are + pairwise different to avoid combinational self loops. Since the LHS + indices of the definitions are all consecutive (as even integers), + the binary format does not have to keep 'lhs'. In addition, we can use + the order restriction and only write the differences 'delta0' and 'delta1' + instead of 'rhs0' and 'rhs1', with + + delta0 = lhs - rhs0, delta1 = rhs0 - rhs1 + + The differences will all be strictly positive, and in practice often very + small. We can take advantage of this fact by the simple little-endian + encoding of unsigned integers of the next section. After the binary delta + encoding of the RHSs of all AND gates, the optional symbol table and + optional comment section start in the same format as in the ASCII case. + + ... + +*/ + +static unsigned Ioa_ObjMakeLit( int Var, int fCompl ) { return (Var << 1) | fCompl; } +static unsigned Ioa_ObjAigerNum( Aig_Obj_t * pObj ) { return (unsigned)pObj->pData; } +static void Ioa_ObjSetAigerNum( Aig_Obj_t * pObj, unsigned Num ) { pObj->pData = (void *)Num; } + +int Ioa_WriteAigerEncode( char * pBuffer, int Pos, unsigned x ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Writes the AIG in the binary AIGER format.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ioa_WriteAiger( Aig_Man_t * pMan, char * pFileName, int fWriteSymbols ) +{ + Bar_Progress_t * pProgress; + FILE * pFile; + Aig_Obj_t * pObj, * pDriver; + int i, nNodes, Pos, nBufferSize; + unsigned char * pBuffer; + unsigned uLit0, uLit1, uLit; + +// assert( Aig_ManIsStrash(pMan) ); + // start the output stream + pFile = fopen( pFileName, "wb" ); + if ( pFile == NULL ) + { + fprintf( stdout, "Ioa_WriteAiger(): Cannot open the output file \"%s\".\n", pFileName ); + return; + } +/* + Aig_ManForEachLatch( pMan, pObj, i ) + if ( !Aig_LatchIsInit0(pObj) ) + { + fprintf( stdout, "Ioa_WriteAiger(): Cannot write AIGER format with non-0 latch init values. Run \"zero\".\n" ); + return; + } +*/ + // set the node numbers to be used in the output file + nNodes = 0; + Ioa_ObjSetAigerNum( Aig_ManConst1(pMan), nNodes++ ); + Aig_ManForEachPi( pMan, pObj, i ) + Ioa_ObjSetAigerNum( pObj, nNodes++ ); + Aig_ManForEachNode( pMan, pObj, i ) + Ioa_ObjSetAigerNum( pObj, nNodes++ ); + + // write the header "M I L O A" where M = I + L + A + fprintf( pFile, "aig %u %u %u %u %u\n", + Aig_ManPiNum(pMan) + Aig_ManNodeNum(pMan), + Aig_ManPiNum(pMan) - Aig_ManRegNum(pMan), + Aig_ManRegNum(pMan), + Aig_ManPoNum(pMan) - Aig_ManRegNum(pMan), + Aig_ManNodeNum(pMan) ); + + // if the driver node is a constant, we need to complement the literal below + // because, in the AIGER format, literal 0/1 is represented as number 0/1 + // while, in ABC, constant 1 node has number 0 and so literal 0/1 will be 1/0 + + // write latch drivers + Aig_ManForEachLiSeq( pMan, pObj, i ) + { + pDriver = Aig_ObjFanin0(pObj); + fprintf( pFile, "%u\n", Ioa_ObjMakeLit( Ioa_ObjAigerNum(pDriver), Aig_ObjFaninC0(pObj) ^ (Ioa_ObjAigerNum(pDriver) == 0) ) ); + } + + // write PO drivers + Aig_ManForEachPoSeq( pMan, pObj, i ) + { + pDriver = Aig_ObjFanin0(pObj); + fprintf( pFile, "%u\n", Ioa_ObjMakeLit( Ioa_ObjAigerNum(pDriver), Aig_ObjFaninC0(pObj) ^ (Ioa_ObjAigerNum(pDriver) == 0) ) ); + } + + // write the nodes into the buffer + Pos = 0; + nBufferSize = 6 * Aig_ManNodeNum(pMan) + 100; // skeptically assuming 3 chars per one AIG edge + pBuffer = ALLOC( char, nBufferSize ); + pProgress = Bar_ProgressStart( stdout, Aig_ManObjNumMax(pMan) ); + Aig_ManForEachNode( pMan, pObj, i ) + { + Bar_ProgressUpdate( pProgress, i, NULL ); + uLit = Ioa_ObjMakeLit( Ioa_ObjAigerNum(pObj), 0 ); + uLit0 = Ioa_ObjMakeLit( Ioa_ObjAigerNum(Aig_ObjFanin0(pObj)), Aig_ObjFaninC0(pObj) ); + uLit1 = Ioa_ObjMakeLit( Ioa_ObjAigerNum(Aig_ObjFanin1(pObj)), Aig_ObjFaninC1(pObj) ); + assert( uLit0 < uLit1 ); + Pos = Ioa_WriteAigerEncode( pBuffer, Pos, uLit - uLit1 ); + Pos = Ioa_WriteAigerEncode( pBuffer, Pos, uLit1 - uLit0 ); + if ( Pos > nBufferSize - 10 ) + { + printf( "Ioa_WriteAiger(): AIGER generation has failed because the allocated buffer is too small.\n" ); + fclose( pFile ); + return; + } + } + assert( Pos < nBufferSize ); + Bar_ProgressStop( pProgress ); + + // write the buffer + fwrite( pBuffer, 1, Pos, pFile ); + free( pBuffer ); +/* + // write the symbol table + if ( fWriteSymbols ) + { + // write PIs + Aig_ManForEachPi( pMan, pObj, i ) + fprintf( pFile, "i%d %s\n", i, Aig_ObjName(pObj) ); + // write latches + Aig_ManForEachLatch( pMan, pObj, i ) + fprintf( pFile, "l%d %s\n", i, Aig_ObjName(Aig_ObjFanout0(pObj)) ); + // write POs + Aig_ManForEachPo( pMan, pObj, i ) + fprintf( pFile, "o%d %s\n", i, Aig_ObjName(pObj) ); + } +*/ + // write the comment + fprintf( pFile, "c\n" ); + if ( pMan->pName ) + fprintf( pFile, ".model %s\n", pMan->pName ); + fprintf( pFile, "This file was produced by the AIG package in ABC on %s\n", Ioa_TimeStamp() ); + fprintf( pFile, "For information about AIGER format, refer to %s\n", "http://fmv.jku.at/aiger" ); + fclose( pFile ); +} + +/**Function************************************************************* + + Synopsis [Adds one unsigned AIG edge to the output buffer.] + + Description [This procedure is a slightly modified version of Armin Biere's + procedure "void encode (FILE * file, unsigned x)" ] + + SideEffects [Returns the current writing position.] + + SeeAlso [] + +***********************************************************************/ +int Ioa_WriteAigerEncode( char * pBuffer, int Pos, unsigned x ) +{ + unsigned char ch; + while (x & ~0x7f) + { + ch = (x & 0x7f) | 0x80; +// putc (ch, file); + pBuffer[Pos++] = ch; + x >>= 7; + } + ch = x; +// putc (ch, file); + pBuffer[Pos++] = ch; + return Pos; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ioa/module.make b/src/aig/ioa/module.make new file mode 100644 index 00000000..66b4a0d5 --- /dev/null +++ b/src/aig/ioa/module.make @@ -0,0 +1,3 @@ +SRC += src/aig/ioa/ioaReadAig.c \ + src/aig/ioa/ioaWriteAig.c \ + src/aig/ioa/ioaUtil.c diff --git a/src/aig/ivy/attr.h b/src/aig/ivy/attr.h new file mode 100644 index 00000000..16cf0b84 --- /dev/null +++ b/src/aig/ivy/attr.h @@ -0,0 +1,414 @@ +/**CFile**************************************************************** + + FileName [attr.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Network attributes.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: attr.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __ATTR_H__ +#define __ATTR_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include "extra.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Attr_ManStruct_t_ Attr_Man_t; +struct Attr_ManStruct_t_ +{ + // attribute info + int nAttrSize; // the size of each attribute in bytes + Extra_MmFixed_t * pManMem; // memory manager for attributes + int nAttrs; // the number of attributes allocated + void ** pAttrs; // the array of attributes + int fUseInt; // uses integer attributes + // attribute specific info + void * pManAttr; // the manager for this attribute + void (*pFuncFreeMan) (void *); // the procedure to call to free attribute-specific manager + void (*pFuncFreeObj) (void *, void *); // the procedure to call to free attribute-specific data +}; + +// at any time, an attribute of the given ID can be +// - not available (p->nAttrs < Id) +// - available but not allocated (p->nAttrs >= Id && p->pAttrs[Id] == NULL) +// - available and allocated (p->nAttrs >= Id && p->pAttrs[Id] != NULL) + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates the attribute manager.] + + Description [The manager is simple if it does not need memory manager.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Attr_Man_t * Attr_ManAlloc( int nAttrSize, int fManMem ) +{ + Attr_Man_t * p; + p = ALLOC( Attr_Man_t, 1 ); + memset( p, 0, sizeof(Attr_Man_t) ); + p->nAttrSize = nAttrSize; + if ( fManMem ) + p->pManMem = Extra_MmFixedStart( nAttrSize ); + return p; +} + +/**Function************************************************************* + + Synopsis [Start the attribute manager for integers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Attr_Man_t * Attr_ManStartInt( int nAttrs ) +{ + Attr_Man_t * p; + p = Attr_ManAlloc( sizeof(int), 0 ); + p->nAttrs = nAttrs; + p->pAttrs = (void **)ALLOC( int, nAttrs ); + memset( (int *)p->pAttrs, 0, sizeof(int) * nAttrs ); + p->fUseInt = 1; + return p; +} + +/**Function************************************************************* + + Synopsis [Start the attribute manager for pointers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Attr_Man_t * Attr_ManStartPtr( int nAttrs ) +{ + Attr_Man_t * p; + p = Attr_ManAlloc( sizeof(void *), 0 ); + p->nAttrs = nAttrs; + p->pAttrs = ALLOC( void *, nAttrs ); + memset( p->pAttrs, 0, sizeof(void *) * nAttrs ); + return p; +} + +/**Function************************************************************* + + Synopsis [Start the attribute manager for the fixed entry size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Attr_Man_t * Attr_ManStartPtrMem( int nAttrs, int nAttrSize ) +{ + Attr_Man_t * p; + int i; + p = Attr_ManAlloc( nAttrSize, 1 ); + p->nAttrs = nAttrs; + p->pAttrs = ALLOC( void *, nAttrs ); + for ( i = 0; i < p->nAttrs; i++ ) + { + p->pAttrs[i] = Extra_MmFixedEntryFetch( p->pManMem ); + memset( p->pAttrs[i], 0, nAttrSize ); + } + return p; +} + +/**Function************************************************************* + + Synopsis [Stop the attribute manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Attr_ManStop( Attr_Man_t * p ) +{ + // free the attributes of objects + if ( p->pFuncFreeObj ) + { + int i; + if ( p->fUseInt ) + { + for ( i = 0; i < p->nAttrs; i++ ) + if ( ((int *)p->pAttrs)[i] ) + p->pFuncFreeObj( p->pManAttr, (void *)((int *)p->pAttrs)[i] ); + } + else + { + for ( i = 0; i < p->nAttrs; i++ ) + if ( p->pAttrs[i] ) + p->pFuncFreeObj( p->pManAttr, p->pAttrs[i] ); + } + } + // free the attribute manager + if ( p->pManAttr && p->pFuncFreeMan ) + p->pFuncFreeMan( p->pManAttr ); + // free the memory manager + if ( p->pManMem ) + Extra_MmFixedStop( p->pManMem); + // free the attribute manager + FREE( p->pAttrs ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Reads the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Attr_ManReadAttrInt( Attr_Man_t * p, int Id ) +{ + assert( p->fUseInt ); + if ( Id >= p->nAttrs ) + return 0; + return ((int *)p->pAttrs)[Id]; +} + +/**Function************************************************************* + + Synopsis [Reads the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void * Attr_ManReadAttrPtr( Attr_Man_t * p, int Id ) +{ + assert( !p->fUseInt ); + if ( Id >= p->nAttrs ) + return NULL; + return p->pAttrs[Id]; +} + +/**Function************************************************************* + + Synopsis [Writes the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Attr_ManWriteAttrInt( Attr_Man_t * p, int Id, int Attr ) +{ + assert( p->fUseInt ); + ((int *)p->pAttrs)[Id] = Attr; +} + +/**Function************************************************************* + + Synopsis [Writes the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Attr_ManWriteAttrPtr( Attr_Man_t * p, int Id, void * pAttr ) +{ + assert( !p->fUseInt ); + assert( p->pManMem == NULL ); + p->pAttrs[Id] = pAttr; +} + +/**Function************************************************************* + + Synopsis [Returns or creates the pointer to the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int * Attr_ManFetchSpotInt( Attr_Man_t * p, int Id ) +{ + assert( p->fUseInt ); + if ( Id >= p->nAttrs ) + { + // save the old size + int i, nAttrsOld = p->nAttrs; + // get the new size + p->nAttrs = p->nAttrs? 2*p->nAttrs : 1024; + p->pAttrs = realloc( p->pAttrs, sizeof(int) * p->nAttrs ); + // fill in the empty spots + for ( i = nAttrsOld; i < p->nAttrs; i++ ) + ((int *)p->pAttrs)[Id] = 0; + } + return ((int *)p->pAttrs) + Id; +} + +/**Function************************************************************* + + Synopsis [Returns or creates the pointer to the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void ** Attr_ManFetchSpotPtr( Attr_Man_t * p, int Id ) +{ + assert( !p->fUseInt ); + if ( Id >= p->nAttrs ) + { + // save the old size + int i, nAttrsOld = p->nAttrs; + // get the new size + p->nAttrs = p->nAttrs? 2*p->nAttrs : 1024; + p->pAttrs = realloc( p->pAttrs, sizeof(void *) * p->nAttrs ); + // fill in the empty spots + for ( i = nAttrsOld; i < p->nAttrs; i++ ) + p->pAttrs[Id] = NULL; + } + // if memory manager is available but entry is not created, create it + if ( p->pManMem && p->pAttrs[Id] != NULL ) + { + p->pAttrs[Id] = Extra_MmFixedEntryFetch( p->pManMem ); + memset( p->pAttrs[Id], 0, p->nAttrSize ); + } + return p->pAttrs + Id; +} + + +/**Function************************************************************* + + Synopsis [Returns or creates the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Attr_ManFetchAttrInt( Attr_Man_t * p, int Id ) +{ + return *Attr_ManFetchSpotInt( p, Id ); +} + +/**Function************************************************************* + + Synopsis [Returns or creates the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void * Attr_ManFetchAttrPtr( Attr_Man_t * p, int Id ) +{ + return *Attr_ManFetchSpotPtr( p, Id ); +} + +/**Function************************************************************* + + Synopsis [Sets the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Attr_ManSetAttrInt( Attr_Man_t * p, int Id, int Attr ) +{ + *Attr_ManFetchSpotInt( p, Id ) = Attr; +} + +/**Function************************************************************* + + Synopsis [Sets the attribute of the given object.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Attr_ManSetAttrPtr( Attr_Man_t * p, int Id, void * pAttr ) +{ + assert( p->pManMem == NULL ); + *Attr_ManFetchSpotPtr( p, Id ) = pAttr; +} + + + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/ivy/ivy.h b/src/aig/ivy/ivy.h new file mode 100644 index 00000000..c7435a63 --- /dev/null +++ b/src/aig/ivy/ivy.h @@ -0,0 +1,557 @@ +/**CFile**************************************************************** + + FileName [ivy.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivy.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __IVY_H__ +#define __IVY_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include "extra.h" +#include "vec.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Ivy_Man_t_ Ivy_Man_t; +typedef struct Ivy_Obj_t_ Ivy_Obj_t; +typedef int Ivy_Edge_t; +typedef struct Ivy_FraigParams_t_ Ivy_FraigParams_t; + +// object types +typedef enum { + IVY_NONE, // 0: non-existent object + IVY_PI, // 1: primary input (and constant 1 node) + IVY_PO, // 2: primary output + IVY_ASSERT, // 3: assertion + IVY_LATCH, // 4: sequential element + IVY_AND, // 5: AND node + IVY_EXOR, // 6: EXOR node + IVY_BUF, // 7: buffer (temporary) + IVY_VOID // 8: unused object +} Ivy_Type_t; + +// latch initial values +typedef enum { + IVY_INIT_NONE, // 0: not a latch + IVY_INIT_0, // 1: zero + IVY_INIT_1, // 2: one + IVY_INIT_DC // 3: don't-care +} Ivy_Init_t; + +// the AIG node +struct Ivy_Obj_t_ // 24 bytes (32-bit) or 32 bytes (64-bit) // 10 words - 16 words +{ + int Id; // integer ID + int TravId; // traversal ID + unsigned Type : 4; // object type + unsigned fMarkA : 1; // multipurpose mask + unsigned fMarkB : 1; // multipurpose mask + unsigned fExFan : 1; // set to 1 if last fanout added is EXOR + unsigned fPhase : 1; // value under 000...0 pattern + unsigned fFailTfo : 1; // the TFO of the failed node + unsigned Init : 2; // latch initial value + unsigned Level : 21; // logic level + int nRefs; // reference counter + Ivy_Obj_t * pFanin0; // fanin + Ivy_Obj_t * pFanin1; // fanin + Ivy_Obj_t * pFanout; // fanout + Ivy_Obj_t * pNextFan0; // next fanout of the first fanin + Ivy_Obj_t * pNextFan1; // next fanout of the second fanin + Ivy_Obj_t * pPrevFan0; // prev fanout of the first fanin + Ivy_Obj_t * pPrevFan1; // prev fanout of the second fanin + Ivy_Obj_t * pEquiv; // equivalent node +}; + +// the AIG manager +struct Ivy_Man_t_ +{ + // AIG nodes + Vec_Ptr_t * vPis; // the array of PIs + Vec_Ptr_t * vPos; // the array of POs + Vec_Ptr_t * vBufs; // the array of buffers + Vec_Ptr_t * vObjs; // the array of objects + Ivy_Obj_t * pConst1; // the constant 1 node + Ivy_Obj_t Ghost; // the ghost node + // AIG node counters + int nObjs[IVY_VOID];// the number of objects by type + int nCreated; // the number of created objects + int nDeleted; // the number of deleted objects + // stuctural hash table + int * pTable; // structural hash table + int nTableSize; // structural hash table size + // various data members + int fCatchExor; // set to 1 to detect EXORs + int nTravIds; // the traversal ID + int nLevelMax; // the maximum level + Vec_Int_t * vRequired; // required times + int fFanout; // fanout is allocated + void * pData; // the temporary data + void * pCopy; // the temporary data + Ivy_Man_t * pHaig; // history AIG if present + int nClassesSkip; // the number of skipped classes + // memory management + Vec_Ptr_t * vChunks; // allocated memory pieces + Vec_Ptr_t * vPages; // memory pages used by nodes + Ivy_Obj_t * pListFree; // the list of free nodes + // timing statistics + int time1; + int time2; +}; + +struct Ivy_FraigParams_t_ +{ + int nSimWords; // the number of words in the simulation info + double dSimSatur; // the ratio of refined classes when saturation is reached + int fPatScores; // enables simulation pattern scoring + int MaxScore; // max score after which resimulation is used + double dActConeRatio; // the ratio of cone to be bumped + double dActConeBumpMax; // the largest bump in activity + int fProve; // prove the miter outputs + int fVerbose; // verbose output + int fDoSparse; // skip sparse functions + int nBTLimitNode; // conflict limit at a node + int nBTLimitMiter; // conflict limit at an output +// int nBTLimitGlobal; // conflict limit global +// int nInsLimitNode; // inspection limit at a node +// int nInsLimitMiter; // inspection limit at an output +// int nInsLimitGlobal; // inspection limit global +}; + + +#define IVY_CUT_LIMIT 256 +#define IVY_CUT_INPUT 6 + +typedef struct Ivy_Cut_t_ Ivy_Cut_t; +struct Ivy_Cut_t_ +{ + int nLatches; + short nSize; + short nSizeMax; + int pArray[IVY_CUT_INPUT]; + unsigned uHash; +}; + +typedef struct Ivy_Store_t_ Ivy_Store_t; +struct Ivy_Store_t_ +{ + int nCuts; + int nCutsM; + int nCutsMax; + int fSatur; + Ivy_Cut_t pCuts[IVY_CUT_LIMIT]; // storage for cuts +}; + +#define IVY_LEAF_MASK 255 +#define IVY_LEAF_BITS 8 + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +#define IVY_MIN(a,b) (((a) < (b))? (a) : (b)) +#define IVY_MAX(a,b) (((a) > (b))? (a) : (b)) + +static inline int Ivy_BitWordNum( int nBits ) { return (nBits>>5) + ((nBits&31) > 0); } +static inline int Ivy_TruthWordNum( int nVars ) { return nVars <= 5 ? 1 : (1 << (nVars - 5)); } +static inline int Ivy_InfoHasBit( unsigned * p, int i ) { return (p[(i)>>5] & (1<<((i) & 31))) > 0; } +static inline void Ivy_InfoSetBit( unsigned * p, int i ) { p[(i)>>5] |= (1<<((i) & 31)); } +static inline void Ivy_InfoXorBit( unsigned * p, int i ) { p[(i)>>5] ^= (1<<((i) & 31)); } + +static inline Ivy_Obj_t * Ivy_Regular( Ivy_Obj_t * p ) { return (Ivy_Obj_t *)((unsigned long)(p) & ~01); } +static inline Ivy_Obj_t * Ivy_Not( Ivy_Obj_t * p ) { return (Ivy_Obj_t *)((unsigned long)(p) ^ 01); } +static inline Ivy_Obj_t * Ivy_NotCond( Ivy_Obj_t * p, int c ) { return (Ivy_Obj_t *)((unsigned long)(p) ^ (c)); } +static inline int Ivy_IsComplement( Ivy_Obj_t * p ) { return (int)((unsigned long)(p) & 01); } + +static inline Ivy_Obj_t * Ivy_ManConst0( Ivy_Man_t * p ) { return Ivy_Not(p->pConst1); } +static inline Ivy_Obj_t * Ivy_ManConst1( Ivy_Man_t * p ) { return p->pConst1; } +static inline Ivy_Obj_t * Ivy_ManGhost( Ivy_Man_t * p ) { return &p->Ghost; } +static inline Ivy_Obj_t * Ivy_ManPi( Ivy_Man_t * p, int i ) { return (Ivy_Obj_t *)Vec_PtrEntry(p->vPis, i); } +static inline Ivy_Obj_t * Ivy_ManPo( Ivy_Man_t * p, int i ) { return (Ivy_Obj_t *)Vec_PtrEntry(p->vPos, i); } +static inline Ivy_Obj_t * Ivy_ManObj( Ivy_Man_t * p, int i ) { return (Ivy_Obj_t *)Vec_PtrEntry(p->vObjs, i); } + +static inline Ivy_Edge_t Ivy_EdgeCreate( int Id, int fCompl ) { return (Id << 1) | fCompl; } +static inline int Ivy_EdgeId( Ivy_Edge_t Edge ) { return Edge >> 1; } +static inline int Ivy_EdgeIsComplement( Ivy_Edge_t Edge ) { return Edge & 1; } +static inline Ivy_Edge_t Ivy_EdgeRegular( Ivy_Edge_t Edge ) { return (Edge >> 1) << 1; } +static inline Ivy_Edge_t Ivy_EdgeNot( Ivy_Edge_t Edge ) { return Edge ^ 1; } +static inline Ivy_Edge_t Ivy_EdgeNotCond( Ivy_Edge_t Edge, int fCond ) { return Edge ^ fCond; } +static inline Ivy_Edge_t Ivy_EdgeFromNode( Ivy_Obj_t * pNode ) { return Ivy_EdgeCreate( Ivy_Regular(pNode)->Id, Ivy_IsComplement(pNode) ); } +static inline Ivy_Obj_t * Ivy_EdgeToNode( Ivy_Man_t * p, Ivy_Edge_t Edge ){ return Ivy_NotCond( Ivy_ManObj(p, Ivy_EdgeId(Edge)), Ivy_EdgeIsComplement(Edge) ); } + +static inline int Ivy_LeafCreate( int Id, int Lat ) { return (Id << IVY_LEAF_BITS) | Lat; } +static inline int Ivy_LeafId( int Leaf ) { return Leaf >> IVY_LEAF_BITS; } +static inline int Ivy_LeafLat( int Leaf ) { return Leaf & IVY_LEAF_MASK; } + +static inline int Ivy_ManPiNum( Ivy_Man_t * p ) { return p->nObjs[IVY_PI]; } +static inline int Ivy_ManPoNum( Ivy_Man_t * p ) { return p->nObjs[IVY_PO]; } +static inline int Ivy_ManAssertNum( Ivy_Man_t * p ) { return p->nObjs[IVY_ASSERT]; } +static inline int Ivy_ManLatchNum( Ivy_Man_t * p ) { return p->nObjs[IVY_LATCH]; } +static inline int Ivy_ManAndNum( Ivy_Man_t * p ) { return p->nObjs[IVY_AND]; } +static inline int Ivy_ManExorNum( Ivy_Man_t * p ) { return p->nObjs[IVY_EXOR]; } +static inline int Ivy_ManBufNum( Ivy_Man_t * p ) { return p->nObjs[IVY_BUF]; } +static inline int Ivy_ManObjNum( Ivy_Man_t * p ) { return p->nCreated - p->nDeleted; } +static inline int Ivy_ManObjIdMax( Ivy_Man_t * p ) { return Vec_PtrSize(p->vObjs)-1; } +static inline int Ivy_ManNodeNum( Ivy_Man_t * p ) { return p->nObjs[IVY_AND]+p->nObjs[IVY_EXOR];} +static inline int Ivy_ManHashObjNum( Ivy_Man_t * p ) { return p->nObjs[IVY_AND]+p->nObjs[IVY_EXOR]+p->nObjs[IVY_LATCH]; } +static inline int Ivy_ManGetCost( Ivy_Man_t * p ) { return p->nObjs[IVY_AND]+3*p->nObjs[IVY_EXOR]+8*p->nObjs[IVY_LATCH]; } + +static inline Ivy_Type_t Ivy_ObjType( Ivy_Obj_t * pObj ) { return pObj->Type; } +static inline Ivy_Init_t Ivy_ObjInit( Ivy_Obj_t * pObj ) { return pObj->Init; } +static inline int Ivy_ObjIsConst1( Ivy_Obj_t * pObj ) { return pObj->Id == 0; } +static inline int Ivy_ObjIsGhost( Ivy_Obj_t * pObj ) { return pObj->Id < 0; } +static inline int Ivy_ObjIsNone( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_NONE; } +static inline int Ivy_ObjIsPi( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_PI; } +static inline int Ivy_ObjIsPo( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_PO; } +static inline int Ivy_ObjIsCi( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_PI || pObj->Type == IVY_LATCH; } +static inline int Ivy_ObjIsCo( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_PO || pObj->Type == IVY_LATCH; } +static inline int Ivy_ObjIsAssert( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_ASSERT; } +static inline int Ivy_ObjIsLatch( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_LATCH; } +static inline int Ivy_ObjIsAnd( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_AND; } +static inline int Ivy_ObjIsExor( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_EXOR; } +static inline int Ivy_ObjIsBuf( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_BUF; } +static inline int Ivy_ObjIsNode( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_AND || pObj->Type == IVY_EXOR; } +static inline int Ivy_ObjIsTerm( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_PI || pObj->Type == IVY_PO || pObj->Type == IVY_ASSERT; } +static inline int Ivy_ObjIsHash( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_AND || pObj->Type == IVY_EXOR || pObj->Type == IVY_LATCH; } +static inline int Ivy_ObjIsOneFanin( Ivy_Obj_t * pObj ) { return pObj->Type == IVY_PO || pObj->Type == IVY_ASSERT || pObj->Type == IVY_BUF || pObj->Type == IVY_LATCH; } + +static inline int Ivy_ObjIsMarkA( Ivy_Obj_t * pObj ) { return pObj->fMarkA; } +static inline void Ivy_ObjSetMarkA( Ivy_Obj_t * pObj ) { pObj->fMarkA = 1; } +static inline void Ivy_ObjClearMarkA( Ivy_Obj_t * pObj ) { pObj->fMarkA = 0; } + +static inline void Ivy_ObjSetTravId( Ivy_Obj_t * pObj, int TravId ) { pObj->TravId = TravId; } +static inline void Ivy_ObjSetTravIdCurrent( Ivy_Man_t * p, Ivy_Obj_t * pObj ) { pObj->TravId = p->nTravIds; } +static inline void Ivy_ObjSetTravIdPrevious( Ivy_Man_t * p, Ivy_Obj_t * pObj ) { pObj->TravId = p->nTravIds - 1; } +static inline int Ivy_ObjIsTravIdCurrent( Ivy_Man_t * p, Ivy_Obj_t * pObj ) { return (int )((int)pObj->TravId == p->nTravIds); } +static inline int Ivy_ObjIsTravIdPrevious( Ivy_Man_t * p, Ivy_Obj_t * pObj ) { return (int )((int)pObj->TravId == p->nTravIds - 1); } + +static inline int Ivy_ObjId( Ivy_Obj_t * pObj ) { return pObj->Id; } +static inline int Ivy_ObjTravId( Ivy_Obj_t * pObj ) { return pObj->TravId; } +static inline int Ivy_ObjPhase( Ivy_Obj_t * pObj ) { return pObj->fPhase; } +static inline int Ivy_ObjExorFanout( Ivy_Obj_t * pObj ) { return pObj->fExFan; } +static inline int Ivy_ObjRefs( Ivy_Obj_t * pObj ) { return pObj->nRefs; } +static inline void Ivy_ObjRefsInc( Ivy_Obj_t * pObj ) { pObj->nRefs++; } +static inline void Ivy_ObjRefsDec( Ivy_Obj_t * pObj ) { assert( pObj->nRefs > 0 ); pObj->nRefs--; } +static inline int Ivy_ObjFaninId0( Ivy_Obj_t * pObj ) { return pObj->pFanin0? Ivy_ObjId(Ivy_Regular(pObj->pFanin0)) : 0; } +static inline int Ivy_ObjFaninId1( Ivy_Obj_t * pObj ) { return pObj->pFanin1? Ivy_ObjId(Ivy_Regular(pObj->pFanin1)) : 0; } +static inline int Ivy_ObjFaninC0( Ivy_Obj_t * pObj ) { return Ivy_IsComplement(pObj->pFanin0); } +static inline int Ivy_ObjFaninC1( Ivy_Obj_t * pObj ) { return Ivy_IsComplement(pObj->pFanin1); } +static inline Ivy_Obj_t * Ivy_ObjFanin0( Ivy_Obj_t * pObj ) { return Ivy_Regular(pObj->pFanin0); } +static inline Ivy_Obj_t * Ivy_ObjFanin1( Ivy_Obj_t * pObj ) { return Ivy_Regular(pObj->pFanin1); } +static inline Ivy_Obj_t * Ivy_ObjChild0( Ivy_Obj_t * pObj ) { return pObj->pFanin0; } +static inline Ivy_Obj_t * Ivy_ObjChild1( Ivy_Obj_t * pObj ) { return pObj->pFanin1; } +static inline Ivy_Obj_t * Ivy_ObjChild0Equiv( Ivy_Obj_t * pObj ) { assert( !Ivy_IsComplement(pObj) ); return Ivy_ObjFanin0(pObj)? Ivy_NotCond(Ivy_ObjFanin0(pObj)->pEquiv, Ivy_ObjFaninC0(pObj)) : NULL; } +static inline Ivy_Obj_t * Ivy_ObjChild1Equiv( Ivy_Obj_t * pObj ) { assert( !Ivy_IsComplement(pObj) ); return Ivy_ObjFanin1(pObj)? Ivy_NotCond(Ivy_ObjFanin1(pObj)->pEquiv, Ivy_ObjFaninC1(pObj)) : NULL; } +static inline Ivy_Obj_t * Ivy_ObjEquiv( Ivy_Obj_t * pObj ) { return Ivy_Regular(pObj)->pEquiv? Ivy_NotCond(Ivy_Regular(pObj)->pEquiv, Ivy_IsComplement(pObj)) : NULL; } +static inline int Ivy_ObjLevel( Ivy_Obj_t * pObj ) { return pObj->Level; } +static inline int Ivy_ObjLevelNew( Ivy_Obj_t * pObj ) { return 1 + Ivy_ObjIsExor(pObj) + IVY_MAX(Ivy_ObjFanin0(pObj)->Level, Ivy_ObjFanin1(pObj)->Level); } +static inline int Ivy_ObjFaninPhase( Ivy_Obj_t * pObj ) { return Ivy_IsComplement(pObj)? !Ivy_Regular(pObj)->fPhase : pObj->fPhase; } + +static inline void Ivy_ObjClean( Ivy_Obj_t * pObj ) +{ + int IdSaved = pObj->Id; + memset( pObj, 0, sizeof(Ivy_Obj_t) ); + pObj->Id = IdSaved; +} +static inline void Ivy_ObjOverwrite( Ivy_Obj_t * pBase, Ivy_Obj_t * pData ) +{ + int IdSaved = pBase->Id; + memcpy( pBase, pData, sizeof(Ivy_Obj_t) ); + pBase->Id = IdSaved; +} +static inline int Ivy_ObjWhatFanin( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanin ) +{ + if ( Ivy_ObjFanin0(pObj) == pFanin ) return 0; + if ( Ivy_ObjFanin1(pObj) == pFanin ) return 1; + assert(0); return -1; +} +static inline int Ivy_ObjFanoutC( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + if ( Ivy_ObjFanin0(pFanout) == pObj ) return Ivy_ObjFaninC0(pObj); + if ( Ivy_ObjFanin1(pFanout) == pObj ) return Ivy_ObjFaninC1(pObj); + assert(0); return -1; +} + +// create the ghost of the new node +static inline Ivy_Obj_t * Ivy_ObjCreateGhost( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1, Ivy_Type_t Type, Ivy_Init_t Init ) +{ + Ivy_Obj_t * pGhost, * pTemp; + assert( Type != IVY_AND || !Ivy_ObjIsConst1(Ivy_Regular(p0)) ); + assert( p1 == NULL || !Ivy_ObjIsConst1(Ivy_Regular(p1)) ); + assert( Type == IVY_PI || Ivy_Regular(p0) != Ivy_Regular(p1) ); + assert( Type != IVY_LATCH || !Ivy_IsComplement(p0) ); +// assert( p1 == NULL || (!Ivy_ObjIsLatch(Ivy_Regular(p0)) || !Ivy_ObjIsLatch(Ivy_Regular(p1))) ); + pGhost = Ivy_ManGhost(p); + pGhost->Type = Type; + pGhost->Init = Init; + pGhost->pFanin0 = p0; + pGhost->pFanin1 = p1; + if ( p1 && Ivy_ObjFaninId0(pGhost) > Ivy_ObjFaninId1(pGhost) ) + pTemp = pGhost->pFanin0, pGhost->pFanin0 = pGhost->pFanin1, pGhost->pFanin1 = pTemp; + return pGhost; +} + +// get the complemented initial state +static Ivy_Init_t Ivy_InitNotCond( Ivy_Init_t Init, int fCompl ) +{ + assert( Init != IVY_INIT_NONE ); + if ( fCompl == 0 ) + return Init; + if ( Init == IVY_INIT_0 ) + return IVY_INIT_1; + if ( Init == IVY_INIT_1 ) + return IVY_INIT_0; + return IVY_INIT_DC; +} + +// get the initial state after forward retiming over AND gate +static Ivy_Init_t Ivy_InitAnd( Ivy_Init_t InitA, Ivy_Init_t InitB ) +{ + assert( InitA != IVY_INIT_NONE && InitB != IVY_INIT_NONE ); + if ( InitA == IVY_INIT_0 || InitB == IVY_INIT_0 ) + return IVY_INIT_0; + if ( InitA == IVY_INIT_DC || InitB == IVY_INIT_DC ) + return IVY_INIT_DC; + return IVY_INIT_1; +} + +// get the initial state after forward retiming over EXOR gate +static Ivy_Init_t Ivy_InitExor( Ivy_Init_t InitA, Ivy_Init_t InitB ) +{ + assert( InitA != IVY_INIT_NONE && InitB != IVY_INIT_NONE ); + if ( InitA == IVY_INIT_DC || InitB == IVY_INIT_DC ) + return IVY_INIT_DC; + if ( InitA == IVY_INIT_0 && InitB == IVY_INIT_1 ) + return IVY_INIT_1; + if ( InitA == IVY_INIT_1 && InitB == IVY_INIT_0 ) + return IVY_INIT_1; + return IVY_INIT_0; +} + +// internal memory manager +static inline Ivy_Obj_t * Ivy_ManFetchMemory( Ivy_Man_t * p ) +{ + extern void Ivy_ManAddMemory( Ivy_Man_t * p ); + Ivy_Obj_t * pTemp; + if ( p->pListFree == NULL ) + Ivy_ManAddMemory( p ); + pTemp = p->pListFree; + p->pListFree = *((Ivy_Obj_t **)pTemp); + memset( pTemp, 0, sizeof(Ivy_Obj_t) ); + return pTemp; +} +static inline void Ivy_ManRecycleMemory( Ivy_Man_t * p, Ivy_Obj_t * pEntry ) +{ + pEntry->Type = IVY_NONE; // distinquishes dead node from live node + *((Ivy_Obj_t **)pEntry) = p->pListFree; + p->pListFree = pEntry; +} + + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +// iterator over the primary inputs +#define Ivy_ManForEachPi( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPis, pObj, i ) +// iterator over the primary outputs +#define Ivy_ManForEachPo( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vPos, pObj, i ) +// iterator over all objects, including those currently not used +#define Ivy_ManForEachObj( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vObjs, pObj, i ) if ( (pObj) == NULL ) {} else +// iterator over the combinational inputs +#define Ivy_ManForEachCi( p, pObj, i ) \ + Ivy_ManForEachObj( p, pObj, i ) if ( !Ivy_ObjIsCi(pObj) ) {} else +// iterator over the combinational outputs +#define Ivy_ManForEachCo( p, pObj, i ) \ + Ivy_ManForEachObj( p, pObj, i ) if ( !Ivy_ObjIsCo(pObj) ) {} else +// iterator over logic nodes (AND and EXOR gates) +#define Ivy_ManForEachNode( p, pObj, i ) \ + Ivy_ManForEachObj( p, pObj, i ) if ( !Ivy_ObjIsNode(pObj) ) {} else +// iterator over logic latches +#define Ivy_ManForEachLatch( p, pObj, i ) \ + Ivy_ManForEachObj( p, pObj, i ) if ( !Ivy_ObjIsLatch(pObj) ) {} else +// iterator over the nodes whose IDs are stored in the array +#define Ivy_ManForEachNodeVec( p, vIds, pObj, i ) \ + for ( i = 0; i < Vec_IntSize(vIds) && ((pObj) = Ivy_ManObj(p, Vec_IntEntry(vIds,i))); i++ ) +// iterator over the fanouts of an object +#define Ivy_ObjForEachFanout( p, pObj, vArray, pFanout, i ) \ + for ( i = 0, Ivy_ObjCollectFanouts(p, pObj, vArray); \ + i < Vec_PtrSize(vArray) && ((pFanout) = Vec_PtrEntry(vArray,i)); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== ivyBalance.c ========================================================*/ +extern Ivy_Man_t * Ivy_ManBalance( Ivy_Man_t * p, int fUpdateLevel ); +extern Ivy_Obj_t * Ivy_NodeBalanceBuildSuper( Ivy_Man_t * p, Vec_Ptr_t * vSuper, Ivy_Type_t Type, int fUpdateLevel ); +/*=== ivyCanon.c ========================================================*/ +extern Ivy_Obj_t * Ivy_CanonAnd( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ); +extern Ivy_Obj_t * Ivy_CanonExor( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ); +extern Ivy_Obj_t * Ivy_CanonLatch( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Init_t Init ); +/*=== ivyCheck.c ========================================================*/ +extern int Ivy_ManCheck( Ivy_Man_t * p ); +extern int Ivy_ManCheckFanoutNums( Ivy_Man_t * p ); +extern int Ivy_ManCheckFanouts( Ivy_Man_t * p ); +extern int Ivy_ManCheckChoices( Ivy_Man_t * p ); +/*=== ivyCut.c ==========================================================*/ +extern void Ivy_ManSeqFindCut( Ivy_Man_t * p, Ivy_Obj_t * pNode, Vec_Int_t * vFront, Vec_Int_t * vInside, int nSize ); +extern Ivy_Store_t * Ivy_NodeFindCutsAll( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves ); +/*=== ivyDfs.c ==========================================================*/ +extern Vec_Int_t * Ivy_ManDfs( Ivy_Man_t * p ); +extern Vec_Int_t * Ivy_ManDfsSeq( Ivy_Man_t * p, Vec_Int_t ** pvLatches ); +extern void Ivy_ManCollectCone( Ivy_Obj_t * pObj, Vec_Ptr_t * vFront, Vec_Ptr_t * vCone ); +extern Vec_Vec_t * Ivy_ManLevelize( Ivy_Man_t * p ); +extern Vec_Int_t * Ivy_ManRequiredLevels( Ivy_Man_t * p ); +extern int Ivy_ManIsAcyclic( Ivy_Man_t * p ); +extern int Ivy_ManSetLevels( Ivy_Man_t * p, int fHaig ); +/*=== ivyDsd.c ==========================================================*/ +extern int Ivy_TruthDsd( unsigned uTruth, Vec_Int_t * vTree ); +extern void Ivy_TruthDsdPrint( FILE * pFile, Vec_Int_t * vTree ); +extern unsigned Ivy_TruthDsdCompute( Vec_Int_t * vTree ); +extern void Ivy_TruthDsdComputePrint( unsigned uTruth ); +extern Ivy_Obj_t * Ivy_ManDsdConstruct( Ivy_Man_t * p, Vec_Int_t * vFront, Vec_Int_t * vTree ); +/*=== ivyFanout.c ==========================================================*/ +extern void Ivy_ManStartFanout( Ivy_Man_t * p ); +extern void Ivy_ManStopFanout( Ivy_Man_t * p ); +extern void Ivy_ObjAddFanout( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ); +extern void Ivy_ObjDeleteFanout( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ); +extern void Ivy_ObjPatchFanout( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFanoutOld, Ivy_Obj_t * pFanoutNew ); +extern void Ivy_ObjCollectFanouts( Ivy_Man_t * p, Ivy_Obj_t * pObj, Vec_Ptr_t * vArray ); +extern Ivy_Obj_t * Ivy_ObjReadFirstFanout( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern int Ivy_ObjFanoutNum( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +/*=== ivyFastMap.c =============================================================*/ +extern void Ivy_FastMapPerform( Ivy_Man_t * pAig, int nLimit, int fRecovery, int fVerbose ); +extern void Ivy_FastMapStop( Ivy_Man_t * pAig ); +extern void Ivy_FastMapReadSupp( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, Vec_Int_t * vLeaves ); +extern void Ivy_FastMapReverseLevel( Ivy_Man_t * pAig ); +/*=== ivyFraig.c ==========================================================*/ +extern int Ivy_FraigProve( Ivy_Man_t ** ppManAig, void * pPars ); +extern Ivy_Man_t * Ivy_FraigPerform( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ); +extern Ivy_Man_t * Ivy_FraigMiter( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ); +extern void Ivy_FraigParamsDefault( Ivy_FraigParams_t * pParams ); +/*=== ivyHaig.c ==========================================================*/ +extern void Ivy_ManHaigStart( Ivy_Man_t * p, int fVerbose ); +extern void Ivy_ManHaigTrasfer( Ivy_Man_t * p, Ivy_Man_t * pNew ); +extern void Ivy_ManHaigStop( Ivy_Man_t * p ); +extern void Ivy_ManHaigPostprocess( Ivy_Man_t * p, int fVerbose ); +extern void Ivy_ManHaigCreateObj( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_ManHaigCreateChoice( Ivy_Man_t * p, Ivy_Obj_t * pObjOld, Ivy_Obj_t * pObjNew ); +extern void Ivy_ManHaigSimulate( Ivy_Man_t * p ); +/*=== ivyMan.c ==========================================================*/ +extern Ivy_Man_t * Ivy_ManStart(); +extern Ivy_Man_t * Ivy_ManStartFrom( Ivy_Man_t * p ); +extern Ivy_Man_t * Ivy_ManDup( Ivy_Man_t * p ); +extern Ivy_Man_t * Ivy_ManFrames( Ivy_Man_t * pMan, int nLatches, int nFrames, int fInit, Vec_Ptr_t ** pvMapping ); +extern void Ivy_ManStop( Ivy_Man_t * p ); +extern int Ivy_ManCleanup( Ivy_Man_t * p ); +extern int Ivy_ManPropagateBuffers( Ivy_Man_t * p, int fUpdateLevel ); +extern void Ivy_ManPrintStats( Ivy_Man_t * p ); +extern void Ivy_ManMakeSeq( Ivy_Man_t * p, int nLatches, int * pInits ); +/*=== ivyMem.c ==========================================================*/ +extern void Ivy_ManStartMemory( Ivy_Man_t * p ); +extern void Ivy_ManStopMemory( Ivy_Man_t * p ); +/*=== ivyMulti.c ==========================================================*/ +extern Ivy_Obj_t * Ivy_Multi( Ivy_Man_t * p, Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ); +extern Ivy_Obj_t * Ivy_Multi1( Ivy_Man_t * p, Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ); +extern Ivy_Obj_t * Ivy_Multi_rec( Ivy_Man_t * p, Ivy_Obj_t ** ppObjs, int nObjs, Ivy_Type_t Type ); +extern Ivy_Obj_t * Ivy_MultiBalance_rec( Ivy_Man_t * p, Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ); +extern int Ivy_MultiPlus( Ivy_Man_t * p, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vCone, Ivy_Type_t Type, int nLimit, Vec_Ptr_t * vSol ); +/*=== ivyObj.c ==========================================================*/ +extern Ivy_Obj_t * Ivy_ObjCreatePi( Ivy_Man_t * p ); +extern Ivy_Obj_t * Ivy_ObjCreatePo( Ivy_Man_t * p, Ivy_Obj_t * pDriver ); +extern Ivy_Obj_t * Ivy_ObjCreate( Ivy_Man_t * p, Ivy_Obj_t * pGhost ); +extern void Ivy_ObjConnect( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFan0, Ivy_Obj_t * pFan1 ); +extern void Ivy_ObjDisconnect( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_ObjPatchFanin0( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFaninNew ); +extern void Ivy_ObjDelete( Ivy_Man_t * p, Ivy_Obj_t * pObj, int fFreeTop ); +extern void Ivy_ObjDelete_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, int fFreeTop ); +extern void Ivy_ObjReplace( Ivy_Man_t * p, Ivy_Obj_t * pObjOld, Ivy_Obj_t * pObjNew, int fDeleteOld, int fFreeTop, int fUpdateLevel ); +extern void Ivy_NodeFixBufferFanins( Ivy_Man_t * p, Ivy_Obj_t * pNode, int fUpdateLevel ); +/*=== ivyOper.c =========================================================*/ +extern Ivy_Obj_t * Ivy_Oper( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1, Ivy_Type_t Type ); +extern Ivy_Obj_t * Ivy_And( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ); +extern Ivy_Obj_t * Ivy_Or( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ); +extern Ivy_Obj_t * Ivy_Exor( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ); +extern Ivy_Obj_t * Ivy_Mux( Ivy_Man_t * p, Ivy_Obj_t * pC, Ivy_Obj_t * p1, Ivy_Obj_t * p0 ); +extern Ivy_Obj_t * Ivy_Maj( Ivy_Man_t * p, Ivy_Obj_t * pA, Ivy_Obj_t * pB, Ivy_Obj_t * pC ); +extern Ivy_Obj_t * Ivy_Miter( Ivy_Man_t * p, Vec_Ptr_t * vPairs ); +extern Ivy_Obj_t * Ivy_Latch( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Init_t Init ); +/*=== ivyResyn.c =========================================================*/ +extern Ivy_Man_t * Ivy_ManResyn0( Ivy_Man_t * p, int fUpdateLevel, int fVerbose ); +extern Ivy_Man_t * Ivy_ManResyn( Ivy_Man_t * p, int fUpdateLevel, int fVerbose ); +extern Ivy_Man_t * Ivy_ManRwsat( Ivy_Man_t * pMan, int fVerbose ); +/*=== ivyRewrite.c =========================================================*/ +extern int Ivy_ManSeqRewrite( Ivy_Man_t * p, int fUpdateLevel, int fUseZeroCost ); +extern int Ivy_ManRewriteAlg( Ivy_Man_t * p, int fUpdateLevel, int fUseZeroCost ); +extern int Ivy_ManRewritePre( Ivy_Man_t * p, int fUpdateLevel, int fUseZeroCost, int fVerbose ); +/*=== ivySeq.c =========================================================*/ +extern int Ivy_ManRewriteSeq( Ivy_Man_t * p, int fUseZeroCost, int fVerbose ); +/*=== ivyShow.c =========================================================*/ +extern void Ivy_ManShow( Ivy_Man_t * pMan, int fHaig, Vec_Ptr_t * vBold ); +/*=== ivyTable.c ========================================================*/ +extern Ivy_Obj_t * Ivy_TableLookup( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_TableInsert( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_TableDelete( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_TableUpdate( Ivy_Man_t * p, Ivy_Obj_t * pObj, int ObjIdNew ); +extern int Ivy_TableCountEntries( Ivy_Man_t * p ); +extern void Ivy_TableProfile( Ivy_Man_t * p ); +/*=== ivyUtil.c =========================================================*/ +extern void Ivy_ManIncrementTravId( Ivy_Man_t * p ); +extern void Ivy_ManCleanTravId( Ivy_Man_t * p ); +extern unsigned * Ivy_ManCutTruth( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Int_t * vLeaves, Vec_Int_t * vNodes, Vec_Int_t * vTruth ); +extern void Ivy_ManCollectCut( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Int_t * vLeaves, Vec_Int_t * vNodes ); +extern Vec_Int_t * Ivy_ManLatches( Ivy_Man_t * p ); +extern int Ivy_ManLevels( Ivy_Man_t * p ); +extern void Ivy_ManResetLevels( Ivy_Man_t * p ); +extern int Ivy_ObjMffcLabel( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_ObjUpdateLevel_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj ); +extern void Ivy_ObjUpdateLevelR_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, int ReqNew ); +extern int Ivy_ObjIsMuxType( Ivy_Obj_t * pObj ); +extern Ivy_Obj_t * Ivy_ObjRecognizeMux( Ivy_Obj_t * pObj, Ivy_Obj_t ** ppObjT, Ivy_Obj_t ** ppObjE ); +extern Ivy_Obj_t * Ivy_ObjReal( Ivy_Obj_t * pObj ); +extern void Ivy_ObjPrintVerbose( Ivy_Man_t * p, Ivy_Obj_t * pObj, int fHaig ); +extern void Ivy_ManPrintVerbose( Ivy_Man_t * p, int fHaig ); +extern int Ivy_CutTruthPrint( Ivy_Man_t * p, Ivy_Cut_t * pCut, unsigned uTruth ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/ivy/ivyBalance.c b/src/aig/ivy/ivyBalance.c new file mode 100644 index 00000000..5627039a --- /dev/null +++ b/src/aig/ivy/ivyBalance.c @@ -0,0 +1,404 @@ +/**CFile**************************************************************** + + FileName [ivyBalance.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Algebraic AIG balancing.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyBalance.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static int Ivy_NodeBalance_rec( Ivy_Man_t * pNew, Ivy_Obj_t * pObj, Vec_Vec_t * vStore, int Level, int fUpdateLevel ); +static Vec_Ptr_t * Ivy_NodeBalanceCone( Ivy_Obj_t * pObj, Vec_Vec_t * vStore, int Level ); +static int Ivy_NodeBalanceFindLeft( Vec_Ptr_t * vSuper ); +static void Ivy_NodeBalancePermute( Ivy_Man_t * p, Vec_Ptr_t * vSuper, int LeftBound, int fExor ); +static void Ivy_NodeBalancePushUniqueOrderByLevel( Vec_Ptr_t * vStore, Ivy_Obj_t * pObj ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs algebraic balancing of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManBalance( Ivy_Man_t * p, int fUpdateLevel ) +{ + Ivy_Man_t * pNew; + Ivy_Obj_t * pObj, * pDriver; + Vec_Vec_t * vStore; + int i, NewNodeId; + // clean the old manager + Ivy_ManCleanTravId( p ); + // create the new manager + pNew = Ivy_ManStart(); + // map the nodes + Ivy_ManConst1(p)->TravId = Ivy_EdgeFromNode( Ivy_ManConst1(pNew) ); + Ivy_ManForEachPi( p, pObj, i ) + pObj->TravId = Ivy_EdgeFromNode( Ivy_ObjCreatePi(pNew) ); + // if HAIG is defined, trasfer the pointers to the PIs/latches +// if ( p->pHaig ) +// Ivy_ManHaigTrasfer( p, pNew ); + // balance the AIG + vStore = Vec_VecAlloc( 50 ); + Ivy_ManForEachPo( p, pObj, i ) + { + pDriver = Ivy_ObjReal( Ivy_ObjChild0(pObj) ); + NewNodeId = Ivy_NodeBalance_rec( pNew, Ivy_Regular(pDriver), vStore, 0, fUpdateLevel ); + NewNodeId = Ivy_EdgeNotCond( NewNodeId, Ivy_IsComplement(pDriver) ); + Ivy_ObjCreatePo( pNew, Ivy_EdgeToNode(pNew, NewNodeId) ); + } + Vec_VecFree( vStore ); + if ( i = Ivy_ManCleanup( pNew ) ) + { +// printf( "Cleanup after balancing removed %d dangling nodes.\n", i ); + } + // check the resulting AIG + if ( !Ivy_ManCheck(pNew) ) + printf( "Ivy_ManBalance(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Procedure used for sorting the nodes in decreasing order of levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeCompareLevelsDecrease( Ivy_Obj_t ** pp1, Ivy_Obj_t ** pp2 ) +{ + int Diff = Ivy_Regular(*pp1)->Level - Ivy_Regular(*pp2)->Level; + if ( Diff > 0 ) + return -1; + if ( Diff < 0 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Returns the ID of new node constructed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeBalance_rec( Ivy_Man_t * pNew, Ivy_Obj_t * pObjOld, Vec_Vec_t * vStore, int Level, int fUpdateLevel ) +{ + Ivy_Obj_t * pObjNew; + Vec_Ptr_t * vSuper; + int i, NewNodeId; + assert( !Ivy_IsComplement(pObjOld) ); + assert( !Ivy_ObjIsBuf(pObjOld) ); + // return if the result is known + if ( Ivy_ObjIsConst1(pObjOld) ) + return pObjOld->TravId; + if ( pObjOld->TravId ) + return pObjOld->TravId; + assert( Ivy_ObjIsNode(pObjOld) ); + // get the implication supergate + vSuper = Ivy_NodeBalanceCone( pObjOld, vStore, Level ); + if ( vSuper->nSize == 0 ) + { // it means that the supergate contains two nodes in the opposite polarity + pObjOld->TravId = Ivy_EdgeFromNode( Ivy_ManConst0(pNew) ); + return pObjOld->TravId; + } + if ( vSuper->nSize < 2 ) + printf( "BUG!\n" ); + // for each old node, derive the new well-balanced node + for ( i = 0; i < vSuper->nSize; i++ ) + { + NewNodeId = Ivy_NodeBalance_rec( pNew, Ivy_Regular(vSuper->pArray[i]), vStore, Level + 1, fUpdateLevel ); + NewNodeId = Ivy_EdgeNotCond( NewNodeId, Ivy_IsComplement(vSuper->pArray[i]) ); + vSuper->pArray[i] = Ivy_EdgeToNode( pNew, NewNodeId ); + } + // build the supergate + pObjNew = Ivy_NodeBalanceBuildSuper( pNew, vSuper, Ivy_ObjType(pObjOld), fUpdateLevel ); + vSuper->nSize = 0; + // make sure the balanced node is not assigned + assert( pObjOld->TravId == 0 ); + pObjOld->TravId = Ivy_EdgeFromNode( pObjNew ); +// assert( pObjOld->Level >= Ivy_Regular(pObjNew)->Level ); + return pObjOld->TravId; +} + +/**Function************************************************************* + + Synopsis [Builds implication supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_NodeBalanceBuildSuper( Ivy_Man_t * p, Vec_Ptr_t * vSuper, Ivy_Type_t Type, int fUpdateLevel ) +{ + Ivy_Obj_t * pObj1, * pObj2; + int LeftBound; + assert( vSuper->nSize > 1 ); + // sort the new nodes by level in the decreasing order + Vec_PtrSort( vSuper, Ivy_NodeCompareLevelsDecrease ); + // balance the nodes + while ( vSuper->nSize > 1 ) + { + // find the left bound on the node to be paired + LeftBound = (!fUpdateLevel)? 0 : Ivy_NodeBalanceFindLeft( vSuper ); + // find the node that can be shared (if no such node, randomize choice) + Ivy_NodeBalancePermute( p, vSuper, LeftBound, Type == IVY_EXOR ); + // pull out the last two nodes + pObj1 = Vec_PtrPop(vSuper); + pObj2 = Vec_PtrPop(vSuper); + Ivy_NodeBalancePushUniqueOrderByLevel( vSuper, Ivy_Oper(p, pObj1, pObj2, Type) ); + } + return Vec_PtrEntry(vSuper, 0); +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeBalanceCone_rec( Ivy_Obj_t * pRoot, Ivy_Obj_t * pObj, Vec_Ptr_t * vSuper ) +{ + int RetValue1, RetValue2, i; + // check if the node is visited + if ( Ivy_Regular(pObj)->fMarkB ) + { + // check if the node occurs in the same polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == pObj ) + return 1; + // check if the node is present in the opposite polarity + for ( i = 0; i < vSuper->nSize; i++ ) + if ( vSuper->pArray[i] == Ivy_Not(pObj) ) + return -1; + assert( 0 ); + return 0; + } + // if the new node is complemented or a PI, another gate begins + if ( pObj != pRoot && (Ivy_IsComplement(pObj) || Ivy_ObjType(pObj) != Ivy_ObjType(pRoot) || Ivy_ObjRefs(pObj) > 1) ) + { + Vec_PtrPush( vSuper, pObj ); + Ivy_Regular(pObj)->fMarkB = 1; + return 0; + } + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjIsNode(pObj) ); + // go through the branches + RetValue1 = Ivy_NodeBalanceCone_rec( pRoot, Ivy_ObjReal( Ivy_ObjChild0(pObj) ), vSuper ); + RetValue2 = Ivy_NodeBalanceCone_rec( pRoot, Ivy_ObjReal( Ivy_ObjChild1(pObj) ), vSuper ); + if ( RetValue1 == -1 || RetValue2 == -1 ) + return -1; + // return 1 if at least one branch has a duplicate + return RetValue1 || RetValue2; +} + +/**Function************************************************************* + + Synopsis [Collects the nodes of the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Ivy_NodeBalanceCone( Ivy_Obj_t * pObj, Vec_Vec_t * vStore, int Level ) +{ + Vec_Ptr_t * vNodes; + int RetValue, i; + assert( !Ivy_IsComplement(pObj) ); + // extend the storage + if ( Vec_VecSize( vStore ) <= Level ) + Vec_VecPush( vStore, Level, 0 ); + // get the temporary array of nodes + vNodes = Vec_VecEntry( vStore, Level ); + Vec_PtrClear( vNodes ); + // collect the nodes in the implication supergate + RetValue = Ivy_NodeBalanceCone_rec( pObj, pObj, vNodes ); + assert( vNodes->nSize > 1 ); + // unmark the visited nodes + Vec_PtrForEachEntry( vNodes, pObj, i ) + Ivy_Regular(pObj)->fMarkB = 0; + // if we found the node and its complement in the same implication supergate, + // return empty set of nodes (meaning that we should use constant-0 node) + if ( RetValue == -1 ) + vNodes->nSize = 0; + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Finds the left bound on the next candidate to be paired.] + + Description [The nodes in the array are in the decreasing order of levels. + The last node in the array has the smallest level. By default it would be paired + with the next node on the left. However, it may be possible to pair it with some + other node on the left, in such a way that the new node is shared. This procedure + finds the index of the left-most node, which can be paired with the last node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeBalanceFindLeft( Vec_Ptr_t * vSuper ) +{ + Ivy_Obj_t * pObjRight, * pObjLeft; + int Current; + // if two or less nodes, pair with the first + if ( Vec_PtrSize(vSuper) < 3 ) + return 0; + // set the pointer to the one before the last + Current = Vec_PtrSize(vSuper) - 2; + pObjRight = Vec_PtrEntry( vSuper, Current ); + // go through the nodes to the left of this one + for ( Current--; Current >= 0; Current-- ) + { + // get the next node on the left + pObjLeft = Vec_PtrEntry( vSuper, Current ); + // if the level of this node is different, quit the loop + if ( Ivy_Regular(pObjLeft)->Level != Ivy_Regular(pObjRight)->Level ) + break; + } + Current++; + // get the node, for which the equality holds + pObjLeft = Vec_PtrEntry( vSuper, Current ); + assert( Ivy_Regular(pObjLeft)->Level == Ivy_Regular(pObjRight)->Level ); + return Current; +} + +/**Function************************************************************* + + Synopsis [Moves closer to the end the node that is best for sharing.] + + Description [If there is no node with sharing, randomly chooses one of + the legal nodes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeBalancePermute( Ivy_Man_t * p, Vec_Ptr_t * vSuper, int LeftBound, int fExor ) +{ + Ivy_Obj_t * pObj1, * pObj2, * pObj3, * pGhost; + int RightBound, i; + // get the right bound + RightBound = Vec_PtrSize(vSuper) - 2; + assert( LeftBound <= RightBound ); + if ( LeftBound == RightBound ) + return; + // get the two last nodes + pObj1 = Vec_PtrEntry( vSuper, RightBound + 1 ); + pObj2 = Vec_PtrEntry( vSuper, RightBound ); + if ( Ivy_Regular(pObj1) == p->pConst1 || Ivy_Regular(pObj2) == p->pConst1 ) + return; + // find the first node that can be shared + for ( i = RightBound; i >= LeftBound; i-- ) + { + pObj3 = Vec_PtrEntry( vSuper, i ); + if ( Ivy_Regular(pObj3) == p->pConst1 ) + { + Vec_PtrWriteEntry( vSuper, i, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + return; + } + pGhost = Ivy_ObjCreateGhost( p, pObj1, pObj3, fExor? IVY_EXOR : IVY_AND, IVY_INIT_NONE ); + if ( Ivy_TableLookup( p, pGhost ) ) + { + if ( pObj3 == pObj2 ) + return; + Vec_PtrWriteEntry( vSuper, i, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + return; + } + } +/* + // we did not find the node to share, randomize choice + { + int Choice = rand() % (RightBound - LeftBound + 1); + pObj3 = Vec_PtrEntry( vSuper, LeftBound + Choice ); + if ( pObj3 == pObj2 ) + return; + Vec_PtrWriteEntry( vSuper, LeftBound + Choice, pObj2 ); + Vec_PtrWriteEntry( vSuper, RightBound, pObj3 ); + } +*/ +} + +/**Function************************************************************* + + Synopsis [Inserts a new node in the order by levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeBalancePushUniqueOrderByLevel( Vec_Ptr_t * vStore, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pObj1, * pObj2; + int i; + if ( Vec_PtrPushUnique(vStore, pObj) ) + return; + // find the p of the node + for ( i = vStore->nSize-1; i > 0; i-- ) + { + pObj1 = vStore->pArray[i ]; + pObj2 = vStore->pArray[i-1]; + if ( Ivy_Regular(pObj1)->Level <= Ivy_Regular(pObj2)->Level ) + break; + vStore->pArray[i ] = pObj2; + vStore->pArray[i-1] = pObj1; + } +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyCanon.c b/src/aig/ivy/ivyCanon.c new file mode 100644 index 00000000..5768b87e --- /dev/null +++ b/src/aig/ivy/ivyCanon.c @@ -0,0 +1,144 @@ +/**CFile**************************************************************** + + FileName [ivyCanon.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Finding canonical form of objects.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyCanon.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Ivy_Obj_t * Ivy_TableLookupPair_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj0, Ivy_Obj_t * pObj1, int fCompl0, int fCompl1, Ivy_Type_t Type ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Creates the canonical form of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_CanonPair_rec( Ivy_Man_t * p, Ivy_Obj_t * pGhost ) +{ + Ivy_Obj_t * pResult, * pLat0, * pLat1; + Ivy_Init_t Init, Init0, Init1; + int fCompl0, fCompl1; + Ivy_Type_t Type; + assert( Ivy_ObjIsNode(pGhost) ); + assert( Ivy_ObjIsAnd(pGhost) || (!Ivy_ObjFaninC0(pGhost) && !Ivy_ObjFaninC1(pGhost)) ); + assert( Ivy_ObjFaninId0(pGhost) != 0 && Ivy_ObjFaninId1(pGhost) != 0 ); + // consider the case when the pair is canonical + if ( !Ivy_ObjIsLatch(Ivy_ObjFanin0(pGhost)) || !Ivy_ObjIsLatch(Ivy_ObjFanin1(pGhost)) ) + { + if ( pResult = Ivy_TableLookup( p, pGhost ) ) + return pResult; + return Ivy_ObjCreate( p, pGhost ); + } + /// remember the latches + pLat0 = Ivy_ObjFanin0(pGhost); + pLat1 = Ivy_ObjFanin1(pGhost); + // remember type and compls + Type = Ivy_ObjType(pGhost); + fCompl0 = Ivy_ObjFaninC0(pGhost); + fCompl1 = Ivy_ObjFaninC1(pGhost); + // call recursively + pResult = Ivy_Oper( p, Ivy_NotCond(Ivy_ObjFanin0(pLat0), fCompl0), Ivy_NotCond(Ivy_ObjFanin0(pLat1), fCompl1), Type ); + // build latch on top of this + Init0 = Ivy_InitNotCond( Ivy_ObjInit(pLat0), fCompl0 ); + Init1 = Ivy_InitNotCond( Ivy_ObjInit(pLat1), fCompl1 ); + Init = (Type == IVY_AND)? Ivy_InitAnd(Init0, Init1) : Ivy_InitExor(Init0, Init1); + return Ivy_Latch( p, pResult, Init ); +} + +/**Function************************************************************* + + Synopsis [Creates the canonical form of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_CanonAnd( Ivy_Man_t * p, Ivy_Obj_t * pObj0, Ivy_Obj_t * pObj1 ) +{ + Ivy_Obj_t * pGhost, * pResult; + pGhost = Ivy_ObjCreateGhost( p, pObj0, pObj1, IVY_AND, IVY_INIT_NONE ); + pResult = Ivy_CanonPair_rec( p, pGhost ); + return pResult; +} + +/**Function************************************************************* + + Synopsis [Creates the canonical form of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_CanonExor( Ivy_Man_t * p, Ivy_Obj_t * pObj0, Ivy_Obj_t * pObj1 ) +{ + Ivy_Obj_t * pGhost, * pResult; + int fCompl = Ivy_IsComplement(pObj0) ^ Ivy_IsComplement(pObj1); + pObj0 = Ivy_Regular(pObj0); + pObj1 = Ivy_Regular(pObj1); + pGhost = Ivy_ObjCreateGhost( p, pObj0, pObj1, IVY_EXOR, IVY_INIT_NONE ); + pResult = Ivy_CanonPair_rec( p, pGhost ); + return Ivy_NotCond( pResult, fCompl ); +} + +/**Function************************************************************* + + Synopsis [Creates the canonical form of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_CanonLatch( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Init_t Init ) +{ + Ivy_Obj_t * pGhost, * pResult; + int fCompl = Ivy_IsComplement(pObj); + pObj = Ivy_Regular(pObj); + pGhost = Ivy_ObjCreateGhost( p, pObj, NULL, IVY_LATCH, Ivy_InitNotCond(Init, fCompl) ); + pResult = Ivy_TableLookup( p, pGhost ); + if ( pResult == NULL ) + pResult = Ivy_ObjCreate( p, pGhost ); + return Ivy_NotCond( pResult, fCompl ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyCheck.c b/src/aig/ivy/ivyCheck.c new file mode 100644 index 00000000..55448f19 --- /dev/null +++ b/src/aig/ivy/ivyCheck.c @@ -0,0 +1,273 @@ +/**CFile**************************************************************** + + FileName [ivyCheck.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [AIG checking procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyCheck.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Checks the consistency of the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManCheck( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj, * pObj2; + int i; + Ivy_ManForEachObj( p, pObj, i ) + { + // skip deleted nodes + if ( Ivy_ObjId(pObj) != i ) + { + printf( "Ivy_ManCheck: Node with ID %d is listed as number %d in the array of objects.\n", pObj->Id, i ); + return 0; + } + // consider the constant node and PIs + if ( i == 0 || Ivy_ObjIsPi(pObj) ) + { + if ( Ivy_ObjFaninId0(pObj) || Ivy_ObjFaninId1(pObj) || Ivy_ObjLevel(pObj) ) + { + printf( "Ivy_ManCheck: The AIG has non-standard constant or PI node with ID \"%d\".\n", pObj->Id ); + return 0; + } + continue; + } + if ( Ivy_ObjIsPo(pObj) ) + { + if ( Ivy_ObjFaninId1(pObj) ) + { + printf( "Ivy_ManCheck: The AIG has non-standard PO node with ID \"%d\".\n", pObj->Id ); + return 0; + } + continue; + } + if ( Ivy_ObjIsBuf(pObj) ) + { + if ( Ivy_ObjFanin1(pObj) ) + { + printf( "Ivy_ManCheck: The buffer with ID \"%d\" contains second fanin.\n", pObj->Id ); + return 0; + } + continue; + } + if ( Ivy_ObjIsLatch(pObj) ) + { + if ( Ivy_ObjFanin1(pObj) ) + { + printf( "Ivy_ManCheck: The latch with ID \"%d\" contains second fanin.\n", pObj->Id ); + return 0; + } + if ( Ivy_ObjInit(pObj) == IVY_INIT_NONE ) + { + printf( "Ivy_ManCheck: The latch with ID \"%d\" does not have initial state.\n", pObj->Id ); + return 0; + } + pObj2 = Ivy_TableLookup( p, pObj ); + if ( pObj2 != pObj ) + printf( "Ivy_ManCheck: Latch with ID \"%d\" is not in the structural hashing table.\n", pObj->Id ); + continue; + } + // consider the AND node + if ( !Ivy_ObjFanin0(pObj) || !Ivy_ObjFanin1(pObj) ) + { + printf( "Ivy_ManCheck: The AIG has internal node \"%d\" with a NULL fanin.\n", pObj->Id ); + return 0; + } + if ( Ivy_ObjFaninId0(pObj) >= Ivy_ObjFaninId1(pObj) ) + { + printf( "Ivy_ManCheck: The AIG has node \"%d\" with a wrong ordering of fanins.\n", pObj->Id ); + return 0; + } + if ( Ivy_ObjLevel(pObj) != Ivy_ObjLevelNew(pObj) ) + printf( "Ivy_ManCheck: Node with ID \"%d\" has level %d but should have level %d.\n", pObj->Id, Ivy_ObjLevel(pObj), Ivy_ObjLevelNew(pObj) ); + pObj2 = Ivy_TableLookup( p, pObj ); + if ( pObj2 != pObj ) + printf( "Ivy_ManCheck: Node with ID \"%d\" is not in the structural hashing table.\n", pObj->Id ); + if ( Ivy_ObjRefs(pObj) == 0 ) + printf( "Ivy_ManCheck: Node with ID \"%d\" has no fanouts.\n", pObj->Id ); + // check fanouts + if ( p->fFanout && Ivy_ObjRefs(pObj) != Ivy_ObjFanoutNum(p, pObj) ) + printf( "Ivy_ManCheck: Node with ID \"%d\" has mismatch between the number of fanouts and refs.\n", pObj->Id ); + } + // count the number of nodes in the table + if ( Ivy_TableCountEntries(p) != Ivy_ManAndNum(p) + Ivy_ManExorNum(p) + Ivy_ManLatchNum(p) ) + { + printf( "Ivy_ManCheck: The number of nodes in the structural hashing table is wrong.\n" ); + return 0; + } +// if ( !Ivy_ManCheckFanouts(p) ) +// return 0; + if ( !Ivy_ManIsAcyclic(p) ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Verifies the fanouts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManCheckFanoutNums( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i, Counter = 0; + Ivy_ManForEachObj( p, pObj, i ) + if ( Ivy_ObjIsNode(pObj) ) + Counter += (Ivy_ObjRefs(pObj) == 0); + if ( Counter ) + printf( "Sequential AIG has %d dangling nodes.\n", Counter ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Verifies the fanouts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManCheckFanouts( Ivy_Man_t * p ) +{ + Vec_Ptr_t * vFanouts; + Ivy_Obj_t * pObj, * pFanout, * pFanin; + int i, k, RetValue = 1; + if ( !p->fFanout ) + return 1; + vFanouts = Vec_PtrAlloc( 100 ); + // make sure every fanin is a fanout + Ivy_ManForEachObj( p, pObj, i ) + { + pFanin = Ivy_ObjFanin0(pObj); + if ( pFanin == NULL ) + continue; + Ivy_ObjForEachFanout( p, pFanin, vFanouts, pFanout, k ) + if ( pFanout == pObj ) + break; + if ( k == Vec_PtrSize(vFanouts) ) + { + printf( "Node %d is a fanin of node %d but the fanout is not there.\n", pFanin->Id, pObj->Id ); + RetValue = 0; + } + + pFanin = Ivy_ObjFanin1(pObj); + if ( pFanin == NULL ) + continue; + Ivy_ObjForEachFanout( p, pFanin, vFanouts, pFanout, k ) + if ( pFanout == pObj ) + break; + if ( k == Vec_PtrSize(vFanouts) ) + { + printf( "Node %d is a fanin of node %d but the fanout is not there.\n", pFanin->Id, pObj->Id ); + RetValue = 0; + } + // check that the previous fanout has the same fanin + if ( pObj->pPrevFan0 ) + { + if ( Ivy_ObjFanin0(pObj->pPrevFan0) != Ivy_ObjFanin0(pObj) && + Ivy_ObjFanin0(pObj->pPrevFan0) != Ivy_ObjFanin1(pObj) && + Ivy_ObjFanin1(pObj->pPrevFan0) != Ivy_ObjFanin0(pObj) && + Ivy_ObjFanin1(pObj->pPrevFan0) != Ivy_ObjFanin1(pObj) ) + { + printf( "Node %d has prev %d without common fanin.\n", pObj->Id, pObj->pPrevFan0->Id ); + RetValue = 0; + } + } + // check that the previous fanout has the same fanin + if ( pObj->pPrevFan1 ) + { + if ( Ivy_ObjFanin0(pObj->pPrevFan1) != Ivy_ObjFanin0(pObj) && + Ivy_ObjFanin0(pObj->pPrevFan1) != Ivy_ObjFanin1(pObj) && + Ivy_ObjFanin1(pObj->pPrevFan1) != Ivy_ObjFanin0(pObj) && + Ivy_ObjFanin1(pObj->pPrevFan1) != Ivy_ObjFanin1(pObj) ) + { + printf( "Node %d has prev %d without common fanin.\n", pObj->Id, pObj->pPrevFan1->Id ); + RetValue = 0; + } + } + } + // make sure every fanout is a fanin + Ivy_ManForEachObj( p, pObj, i ) + { + Ivy_ObjForEachFanout( p, pObj, vFanouts, pFanout, k ) + if ( Ivy_ObjFanin0(pFanout) != pObj && Ivy_ObjFanin1(pFanout) != pObj ) + { + printf( "Node %d is a fanout of node %d but the fanin is not there.\n", pFanout->Id, pObj->Id ); + RetValue = 0; + } + } + Vec_PtrFree( vFanouts ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Checks that each choice node has exactly one node with fanouts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManCheckChoices( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj, * pTemp; + int i; + Ivy_ManForEachObj( p->pHaig, pObj, i ) + { + if ( Ivy_ObjRefs(pObj) == 0 ) + continue; + // count the number of nodes in the loop + assert( !Ivy_IsComplement(pObj->pEquiv) ); + for ( pTemp = pObj->pEquiv; pTemp && pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + if ( Ivy_ObjRefs(pTemp) > 1 ) + printf( "Node %d has member %d in its equiv class with %d fanouts.\n", pObj->Id, pTemp->Id, Ivy_ObjRefs(pTemp) ); + } + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyCut.c b/src/aig/ivy/ivyCut.c new file mode 100644 index 00000000..e257d8a6 --- /dev/null +++ b/src/aig/ivy/ivyCut.c @@ -0,0 +1,989 @@ +/**CFile**************************************************************** + + FileName [ivyCut.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Computes reconvergence driven sequential cut.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyCut.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static inline int Ivy_NodeCutHashValue( int NodeId ) { return 1 << (NodeId % 31); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Evaluate the cost of removing the node from the set of leaves.] + + Description [Returns the number of new leaves that will be brought in. + Returns large number if the node cannot be removed from the set of leaves.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_NodeGetLeafCostOne( Ivy_Man_t * p, int Leaf, Vec_Int_t * vInside ) +{ + Ivy_Obj_t * pNode; + int nLatches, FaninLeaf, Cost; + // make sure leaf is not a contant node + assert( Leaf > 0 ); + // get the node + pNode = Ivy_ManObj( p, Ivy_LeafId(Leaf) ); + // cannot expand over the PI node + if ( Ivy_ObjIsPi(pNode) || Ivy_ObjIsConst1(pNode) ) + return 999; + // get the number of latches + nLatches = Ivy_LeafLat(Leaf) + Ivy_ObjIsLatch(pNode); + if ( nLatches > 15 ) + return 999; + // get the first fanin + FaninLeaf = Ivy_LeafCreate( Ivy_ObjFaninId0(pNode), nLatches ); + Cost = FaninLeaf && (Vec_IntFind(vInside, FaninLeaf) == -1); + // quit if this is the one fanin node + if ( Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ) + return Cost; + assert( Ivy_ObjIsNode(pNode) ); + // get the second fanin + FaninLeaf = Ivy_LeafCreate( Ivy_ObjFaninId1(pNode), nLatches ); + Cost += FaninLeaf && (Vec_IntFind(vInside, FaninLeaf) == -1); + return Cost; +} + +/**Function************************************************************* + + Synopsis [Builds reconvergence-driven cut by changing one leaf at a time.] + + Description [This procedure looks at the current leaves and tries to change + one leaf at a time in such a way that the cut grows as little as possible. + In evaluating the fanins, this procedure looks only at their immediate + predecessors (this is why it is called a one-level construction procedure).] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManSeqFindCut_int( Ivy_Man_t * p, Vec_Int_t * vFront, Vec_Int_t * vInside, int nSizeLimit ) +{ + Ivy_Obj_t * pNode; + int CostBest, CostCur, Leaf, LeafBest, Next, nLatches, i; + int LeavesBest[10]; + int Counter; + + // add random selection of the best fanin!!! + + // find the best fanin + CostBest = 99; + LeafBest = -1; + Counter = -1; +//printf( "Evaluating fanins of the cut:\n" ); + Vec_IntForEachEntry( vFront, Leaf, i ) + { + CostCur = Ivy_NodeGetLeafCostOne( p, Leaf, vInside ); +//printf( " Fanin %s has cost %d.\n", Ivy_ObjName(pNode), CostCur ); + if ( CostBest > CostCur ) + { + CostBest = CostCur; + LeafBest = Leaf; + LeavesBest[0] = Leaf; + Counter = 1; + } + else if ( CostBest == CostCur ) + LeavesBest[Counter++] = Leaf; + + if ( CostBest <= 1 ) // can be if ( CostBest <= 1 ) + break; + } + if ( CostBest == 99 ) + return 0; +// return Ivy_NodeBuildCutLevelTwo_int( vInside, vFront, nFaninLimit ); + + assert( CostBest < 3 ); + if ( Vec_IntSize(vFront) - 1 + CostBest > nSizeLimit ) + return 0; +// return Ivy_NodeBuildCutLevelTwo_int( vInside, vFront, nFaninLimit ); + + assert( Counter > 0 ); +printf( "%d", Counter ); + + LeafBest = LeavesBest[rand() % Counter]; + + // remove the node from the array + assert( LeafBest >= 0 ); + Vec_IntRemove( vFront, LeafBest ); +//printf( "Removing fanin %s.\n", Ivy_ObjName(pNode) ); + + // get the node and its latches + pNode = Ivy_ManObj( p, Ivy_LeafId(LeafBest) ); + nLatches = Ivy_LeafLat(LeafBest) + Ivy_ObjIsLatch(pNode); + assert( Ivy_ObjIsNode(pNode) || Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ); + + // add the left child to the fanins + Next = Ivy_LeafCreate( Ivy_ObjFaninId0(pNode), nLatches ); + if ( Next && Vec_IntFind(vInside, Next) == -1 ) + { +//printf( "Adding fanin %s.\n", Ivy_ObjName(pNext) ); + Vec_IntPush( vFront, Next ); + Vec_IntPush( vInside, Next ); + } + + // quit if this is the one fanin node + if ( Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ) + return 1; + assert( Ivy_ObjIsNode(pNode) ); + + // add the right child to the fanins + Next = Ivy_LeafCreate( Ivy_ObjFaninId1(pNode), nLatches ); + if ( Next && Vec_IntFind(vInside, Next) == -1 ) + { +//printf( "Adding fanin %s.\n", Ivy_ObjName(pNext) ); + Vec_IntPush( vFront, Next ); + Vec_IntPush( vInside, Next ); + } + assert( Vec_IntSize(vFront) <= nSizeLimit ); + // keep doing this + return 1; +} + +/**Function************************************************************* + + Synopsis [Computes one sequential cut of the given size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManSeqFindCut( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Int_t * vFront, Vec_Int_t * vInside, int nSize ) +{ + assert( !Ivy_IsComplement(pRoot) ); + assert( Ivy_ObjIsNode(pRoot) ); + assert( Ivy_ObjFaninId0(pRoot) ); + assert( Ivy_ObjFaninId1(pRoot) ); + + // start the cut + Vec_IntClear( vFront ); + Vec_IntPush( vFront, Ivy_LeafCreate(Ivy_ObjFaninId0(pRoot), 0) ); + Vec_IntPush( vFront, Ivy_LeafCreate(Ivy_ObjFaninId1(pRoot), 0) ); + + // start the visited nodes + Vec_IntClear( vInside ); + Vec_IntPush( vInside, Ivy_LeafCreate(pRoot->Id, 0) ); + Vec_IntPush( vInside, Ivy_LeafCreate(Ivy_ObjFaninId0(pRoot), 0) ); + Vec_IntPush( vInside, Ivy_LeafCreate(Ivy_ObjFaninId1(pRoot), 0) ); + + // compute the cut + while ( Ivy_ManSeqFindCut_int( p, vFront, vInside, nSize ) ); + assert( Vec_IntSize(vFront) <= nSize ); +} + + + + + +/**Function************************************************************* + + Synopsis [Computing Boolean cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManFindBoolCut_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vVolume, Ivy_Obj_t * pPivot ) +{ + int RetValue0, RetValue1; + if ( pObj == pPivot ) + { + Vec_PtrPushUnique( vLeaves, pObj ); + Vec_PtrPushUnique( vVolume, pObj ); + return 1; + } + if ( pObj->fMarkA ) + return 0; + +// assert( !Ivy_ObjIsCi(pObj) ); + if ( Ivy_ObjIsCi(pObj) ) + return 0; + + if ( Ivy_ObjIsBuf(pObj) ) + { + RetValue0 = Ivy_ManFindBoolCut_rec( p, Ivy_ObjFanin0(pObj), vLeaves, vVolume, pPivot ); + if ( !RetValue0 ) + return 0; + Vec_PtrPushUnique( vVolume, pObj ); + return 1; + } + assert( Ivy_ObjIsNode(pObj) ); + RetValue0 = Ivy_ManFindBoolCut_rec( p, Ivy_ObjFanin0(pObj), vLeaves, vVolume, pPivot ); + RetValue1 = Ivy_ManFindBoolCut_rec( p, Ivy_ObjFanin1(pObj), vLeaves, vVolume, pPivot ); + if ( !RetValue0 && !RetValue1 ) + return 0; + // add new leaves + if ( !RetValue0 ) + { + Vec_PtrPushUnique( vLeaves, Ivy_ObjFanin0(pObj) ); + Vec_PtrPushUnique( vVolume, Ivy_ObjFanin0(pObj) ); + } + if ( !RetValue1 ) + { + Vec_PtrPushUnique( vLeaves, Ivy_ObjFanin1(pObj) ); + Vec_PtrPushUnique( vVolume, Ivy_ObjFanin1(pObj) ); + } + Vec_PtrPushUnique( vVolume, pObj ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns the cost of one node (how many new nodes are added.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManFindBoolCutCost( Ivy_Obj_t * pObj ) +{ + int Cost; + // make sure the node is in the construction zone + assert( pObj->fMarkA == 1 ); + // cannot expand over the PI node + if ( Ivy_ObjIsCi(pObj) ) + return 999; + // always expand over the buffer + if ( Ivy_ObjIsBuf(pObj) ) + return !Ivy_ObjFanin0(pObj)->fMarkA; + // get the cost of the cone + Cost = (!Ivy_ObjFanin0(pObj)->fMarkA) + (!Ivy_ObjFanin1(pObj)->fMarkA); + // return the number of nodes to be added to the leaves if this node is removed + return Cost; +} + +/**Function************************************************************* + + Synopsis [Computing Boolean cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManFindBoolCut( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Ptr_t * vFront, Vec_Ptr_t * vVolume, Vec_Ptr_t * vLeaves ) +{ + Ivy_Obj_t * pObj, * pFaninC, * pFanin0, * pFanin1, * pPivot; + int RetValue, LevelLimit, Lev, k; + assert( !Ivy_IsComplement(pRoot) ); + // clear the frontier and collect the nodes + Vec_PtrClear( vFront ); + Vec_PtrClear( vVolume ); + if ( Ivy_ObjIsMuxType(pRoot) ) + pFaninC = Ivy_ObjRecognizeMux( pRoot, &pFanin0, &pFanin1 ); + else + { + pFaninC = NULL; + pFanin0 = Ivy_ObjFanin0(pRoot); + pFanin1 = Ivy_ObjFanin1(pRoot); + } + // start cone A + pFanin0->fMarkA = 1; + Vec_PtrPush( vFront, pFanin0 ); + Vec_PtrPush( vVolume, pFanin0 ); + // start cone B + pFanin1->fMarkB = 1; + Vec_PtrPush( vFront, pFanin1 ); + Vec_PtrPush( vVolume, pFanin1 ); + // iteratively expand until the common node (pPivot) is found or limit is reached + assert( Ivy_ObjLevel(pRoot) == Ivy_ObjLevelNew(pRoot) ); + pPivot = NULL; + LevelLimit = IVY_MAX( Ivy_ObjLevel(pRoot) - 10, 1 ); + for ( Lev = Ivy_ObjLevel(pRoot) - 1; Lev >= LevelLimit; Lev-- ) + { + while ( 1 ) + { + // find the next node to expand on this level + Vec_PtrForEachEntry( vFront, pObj, k ) + if ( (int)pObj->Level == Lev ) + break; + if ( k == Vec_PtrSize(vFront) ) + break; + assert( (int)pObj->Level <= Lev ); + assert( pObj->fMarkA ^ pObj->fMarkB ); + // remove the old node + Vec_PtrRemove( vFront, pObj ); + + // expand this node + pFanin0 = Ivy_ObjFanin0(pObj); + if ( !pFanin0->fMarkA && !pFanin0->fMarkB ) + { + Vec_PtrPush( vFront, pFanin0 ); + Vec_PtrPush( vVolume, pFanin0 ); + } + // mark the new nodes + if ( pObj->fMarkA ) + pFanin0->fMarkA = 1; + if ( pObj->fMarkB ) + pFanin0->fMarkB = 1; + + if ( Ivy_ObjIsBuf(pObj) ) + { + if ( pFanin0->fMarkA && pFanin0->fMarkB ) + { + pPivot = pFanin0; + break; + } + continue; + } + + // expand this node + pFanin1 = Ivy_ObjFanin1(pObj); + if ( !pFanin1->fMarkA && !pFanin1->fMarkB ) + { + Vec_PtrPush( vFront, pFanin1 ); + Vec_PtrPush( vVolume, pFanin1 ); + } + // mark the new nodes + if ( pObj->fMarkA ) + pFanin1->fMarkA = 1; + if ( pObj->fMarkB ) + pFanin1->fMarkB = 1; + + // consider if it is time to quit + if ( pFanin0->fMarkA && pFanin0->fMarkB ) + { + pPivot = pFanin0; + break; + } + if ( pFanin1->fMarkA && pFanin1->fMarkB ) + { + pPivot = pFanin1; + break; + } + } + if ( pPivot != NULL ) + break; + } + if ( pPivot == NULL ) + return 0; + // if the MUX control is defined, it should not be + if ( pFaninC && !pFaninC->fMarkA && !pFaninC->fMarkB ) + Vec_PtrPush( vFront, pFaninC ); + // clean the markings + Vec_PtrForEachEntry( vVolume, pObj, k ) + pObj->fMarkA = pObj->fMarkB = 0; + + // mark the nodes on the frontier (including the pivot) + Vec_PtrForEachEntry( vFront, pObj, k ) + pObj->fMarkA = 1; + // cut exists, collect all the nodes on the shortest path to the pivot + Vec_PtrClear( vLeaves ); + Vec_PtrClear( vVolume ); + RetValue = Ivy_ManFindBoolCut_rec( p, pRoot, vLeaves, vVolume, pPivot ); + assert( RetValue == 1 ); + // unmark the nodes on the frontier (including the pivot) + Vec_PtrForEachEntry( vFront, pObj, k ) + pObj->fMarkA = 0; + + // mark the nodes in the volume + Vec_PtrForEachEntry( vVolume, pObj, k ) + pObj->fMarkA = 1; + // expand the cut without increasing its size + while ( 1 ) + { + Vec_PtrForEachEntry( vLeaves, pObj, k ) + if ( Ivy_ManFindBoolCutCost(pObj) < 2 ) + break; + if ( k == Vec_PtrSize(vLeaves) ) + break; + // the node can be expanded + // remove the old node + Vec_PtrRemove( vLeaves, pObj ); + // expand this node + pFanin0 = Ivy_ObjFanin0(pObj); + if ( !pFanin0->fMarkA ) + { + pFanin0->fMarkA = 1; + Vec_PtrPush( vVolume, pFanin0 ); + Vec_PtrPush( vLeaves, pFanin0 ); + } + if ( Ivy_ObjIsBuf(pObj) ) + continue; + // expand this node + pFanin1 = Ivy_ObjFanin1(pObj); + if ( !pFanin1->fMarkA ) + { + pFanin1->fMarkA = 1; + Vec_PtrPush( vVolume, pFanin1 ); + Vec_PtrPush( vLeaves, pFanin1 ); + } + } + // unmark the nodes in the volume + Vec_PtrForEachEntry( vVolume, pObj, k ) + pObj->fMarkA = 0; + return 1; +} + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManTestCutsBool( Ivy_Man_t * p ) +{ + Vec_Ptr_t * vFront, * vVolume, * vLeaves; + Ivy_Obj_t * pObj;//, * pTemp; + int i, RetValue;//, k; + vFront = Vec_PtrAlloc( 100 ); + vVolume = Vec_PtrAlloc( 100 ); + vLeaves = Vec_PtrAlloc( 100 ); + Ivy_ManForEachObj( p, pObj, i ) + { + if ( !Ivy_ObjIsNode(pObj) ) + continue; + if ( Ivy_ObjIsMuxType(pObj) ) + { + printf( "m" ); + continue; + } + if ( Ivy_ObjIsExor(pObj) ) + printf( "x" ); + RetValue = Ivy_ManFindBoolCut( p, pObj, vFront, vVolume, vLeaves ); + if ( RetValue == 0 ) + printf( "- " ); + else + printf( "%d ", Vec_PtrSize(vLeaves) ); +/* + printf( "( " ); + Vec_PtrForEachEntry( vFront, pTemp, k ) + printf( "%d ", Ivy_ObjRefs(Ivy_Regular(pTemp)) ); + printf( ")\n" ); +*/ + } + printf( "\n" ); + Vec_PtrFree( vFront ); + Vec_PtrFree( vVolume ); + Vec_PtrFree( vLeaves ); +} + + + +/**Function************************************************************* + + Synopsis [Find the hash value of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Ivy_NodeCutHash( Ivy_Cut_t * pCut ) +{ + int i; +// for ( i = 1; i < pCut->nSize; i++ ) +// assert( pCut->pArray[i-1] < pCut->pArray[i] ); + pCut->uHash = 0; + for ( i = 0; i < pCut->nSize; i++ ) + pCut->uHash |= (1 << (pCut->pArray[i] % 31)); + return pCut->uHash; +} + +/**Function************************************************************* + + Synopsis [Removes one node to the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Ivy_NodeCutShrink( Ivy_Cut_t * pCut, int iOld ) +{ + int i, k; + for ( i = k = 0; i < pCut->nSize; i++ ) + if ( pCut->pArray[i] != iOld ) + pCut->pArray[k++] = pCut->pArray[i]; + assert( k == pCut->nSize - 1 ); + pCut->nSize--; +} + +/**Function************************************************************* + + Synopsis [Adds one node to the cut.] + + Description [Returns 1 if the cuts is still okay.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_NodeCutExtend( Ivy_Cut_t * pCut, int iNew ) +{ + int i; + for ( i = 0; i < pCut->nSize; i++ ) + if ( pCut->pArray[i] == iNew ) + return 1; + // check if there is room + if ( pCut->nSize == pCut->nSizeMax ) + return 0; + // add the new one + for ( i = pCut->nSize - 1; i >= 0; i-- ) + if ( pCut->pArray[i] > iNew ) + pCut->pArray[i+1] = pCut->pArray[i]; + else + { + assert( pCut->pArray[i] < iNew ); + break; + } + pCut->pArray[i+1] = iNew; + pCut->nSize++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the cut can be constructed; 0 otherwise.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_NodeCutPrescreen( Ivy_Cut_t * pCut, int Id0, int Id1 ) +{ + int i; + if ( pCut->nSize < pCut->nSizeMax ) + return 1; + for ( i = 0; i < pCut->nSize; i++ ) + if ( pCut->pArray[i] == Id0 || pCut->pArray[i] == Id1 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Derives new cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_NodeCutDeriveNew( Ivy_Cut_t * pCut, Ivy_Cut_t * pCutNew, int IdOld, int IdNew0, int IdNew1 ) +{ + unsigned uHash = 0; + int i, k; + assert( pCut->nSize > 0 ); + assert( IdNew0 < IdNew1 ); + for ( i = k = 0; i < pCut->nSize; i++ ) + { + if ( pCut->pArray[i] == IdOld ) + continue; + if ( IdNew0 <= pCut->pArray[i] ) + { + if ( IdNew0 < pCut->pArray[i] ) + { + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_NodeCutHashValue( IdNew0 ); + } + IdNew0 = 0x7FFFFFFF; + } + if ( IdNew1 <= pCut->pArray[i] ) + { + if ( IdNew1 < pCut->pArray[i] ) + { + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_NodeCutHashValue( IdNew1 ); + } + IdNew1 = 0x7FFFFFFF; + } + pCutNew->pArray[ k++ ] = pCut->pArray[i]; + uHash |= Ivy_NodeCutHashValue( pCut->pArray[i] ); + } + if ( IdNew0 < 0x7FFFFFFF ) + { + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_NodeCutHashValue( IdNew0 ); + } + if ( IdNew1 < 0x7FFFFFFF ) + { + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_NodeCutHashValue( IdNew1 ); + } + pCutNew->nSize = k; + pCutNew->uHash = uHash; + assert( pCutNew->nSize <= pCut->nSizeMax ); +// for ( i = 1; i < pCutNew->nSize; i++ ) +// assert( pCutNew->pArray[i-1] < pCutNew->pArray[i] ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Check if the cut exists.] + + Description [Returns 1 if the cut exists.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeCutFindOrAdd( Ivy_Store_t * pCutStore, Ivy_Cut_t * pCutNew ) +{ + Ivy_Cut_t * pCut; + int i, k; + assert( pCutNew->uHash ); + // try to find the cut + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->uHash == pCutNew->uHash && pCut->nSize == pCutNew->nSize ) + { + for ( k = 0; k < pCutNew->nSize; k++ ) + if ( pCut->pArray[k] != pCutNew->pArray[k] ) + break; + if ( k == pCutNew->nSize ) + return 1; + } + } + assert( pCutStore->nCuts < pCutStore->nCutsMax ); + // add the cut + pCut = pCutStore->pCuts + pCutStore->nCuts++; + *pCut = *pCutNew; + return 0; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pDom is contained in pCut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutCheckDominance( Ivy_Cut_t * pDom, Ivy_Cut_t * pCut ) +{ + int i, k; + for ( i = 0; i < pDom->nSize; i++ ) + { + for ( k = 0; k < pCut->nSize; k++ ) + if ( pDom->pArray[i] == pCut->pArray[k] ) + break; + if ( k == pCut->nSize ) // node i in pDom is not contained in pCut + return 0; + } + // every node in pDom is contained in pCut + return 1; +} + +/**Function************************************************************* + + Synopsis [Check if the cut exists.] + + Description [Returns 1 if the cut exists.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeCutFindOrAddFilter( Ivy_Store_t * pCutStore, Ivy_Cut_t * pCutNew ) +{ + Ivy_Cut_t * pCut; + int i, k; + assert( pCutNew->uHash ); + // try to find the cut + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + if ( pCut->nSize == pCutNew->nSize ) + { + if ( pCut->uHash == pCutNew->uHash ) + { + for ( k = 0; k < pCutNew->nSize; k++ ) + if ( pCut->pArray[k] != pCutNew->pArray[k] ) + break; + if ( k == pCutNew->nSize ) + return 1; + } + continue; + } + if ( pCut->nSize < pCutNew->nSize ) + { + // skip the non-contained cuts + if ( (pCut->uHash & pCutNew->uHash) != pCut->uHash ) + continue; + // check containment seriously + if ( Ivy_CutCheckDominance( pCut, pCutNew ) ) + return 1; + continue; + } + // check potential containment of other cut + + // skip the non-contained cuts + if ( (pCut->uHash & pCutNew->uHash) != pCutNew->uHash ) + continue; + // check containment seriously + if ( Ivy_CutCheckDominance( pCutNew, pCut ) ) + { + // remove the current cut +// --pCutStore->nCuts; +// for ( k = i; k < pCutStore->nCuts; k++ ) +// pCutStore->pCuts[k] = pCutStore->pCuts[k+1]; +// i--; + pCut->nSize = 0; + } + } + assert( pCutStore->nCuts < pCutStore->nCutsMax ); + // add the cut + pCut = pCutStore->pCuts + pCutStore->nCuts++; + *pCut = *pCutNew; + return 0; +} + +/**Function************************************************************* + + Synopsis [Print the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeCompactCuts( Ivy_Store_t * pCutStore ) +{ + Ivy_Cut_t * pCut; + int i, k; + for ( i = k = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + pCutStore->pCuts[k++] = *pCut; + } + pCutStore->nCuts = k; +} + +/**Function************************************************************* + + Synopsis [Print the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodePrintCut( Ivy_Cut_t * pCut ) +{ + int i; + assert( pCut->nSize > 0 ); + printf( "%d : {", pCut->nSize ); + for ( i = 0; i < pCut->nSize; i++ ) + printf( " %d", pCut->pArray[i] ); + printf( " }\n" ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodePrintCuts( Ivy_Store_t * pCutStore ) +{ + int i; + printf( "Node %d\n", pCutStore->pCuts[0].pArray[0] ); + for ( i = 0; i < pCutStore->nCuts; i++ ) + Ivy_NodePrintCut( pCutStore->pCuts + i ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Ivy_Obj_t * Ivy_ObjRealFanin( Ivy_Obj_t * pObj ) +{ + if ( !Ivy_ObjIsBuf(pObj) ) + return pObj; + return Ivy_ObjRealFanin( Ivy_ObjFanin0(pObj) ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Store_t * Ivy_NodeFindCutsAll( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves ) +{ + static Ivy_Store_t CutStore, * pCutStore = &CutStore; + Ivy_Cut_t CutNew, * pCutNew = &CutNew, * pCut; + Ivy_Obj_t * pLeaf; + int i, k, iLeaf0, iLeaf1; + + assert( nLeaves <= IVY_CUT_INPUT ); + + // start the structure + pCutStore->nCuts = 0; + pCutStore->nCutsMax = IVY_CUT_LIMIT; + // start the trivial cut + pCutNew->uHash = 0; + pCutNew->nSize = 1; + pCutNew->nSizeMax = nLeaves; + pCutNew->pArray[0] = pObj->Id; + Ivy_NodeCutHash( pCutNew ); + // add the trivial cut + Ivy_NodeCutFindOrAdd( pCutStore, pCutNew ); + assert( pCutStore->nCuts == 1 ); + + // explore the cuts + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + // expand this cut + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + for ( k = 0; k < pCut->nSize; k++ ) + { + pLeaf = Ivy_ManObj( p, pCut->pArray[k] ); + if ( Ivy_ObjIsCi(pLeaf) ) + continue; +/* + *pCutNew = *pCut; + Ivy_NodeCutShrink( pCutNew, pLeaf->Id ); + if ( !Ivy_NodeCutExtend( pCutNew, Ivy_ObjFaninId0(pLeaf) ) ) + continue; + if ( Ivy_ObjIsNode(pLeaf) && !Ivy_NodeCutExtend( pCutNew, Ivy_ObjFaninId1(pLeaf) ) ) + continue; + Ivy_NodeCutHash( pCutNew ); +*/ + iLeaf0 = Ivy_ObjId( Ivy_ObjRealFanin(Ivy_ObjFanin0(pLeaf)) ); + iLeaf1 = Ivy_ObjId( Ivy_ObjRealFanin(Ivy_ObjFanin1(pLeaf)) ); +// if ( iLeaf0 == iLeaf1 ) // strange situation observed on Jan 18, 2007 +// continue; + if ( !Ivy_NodeCutPrescreen( pCut, iLeaf0, iLeaf1 ) ) + continue; + if ( iLeaf0 > iLeaf1 ) + Ivy_NodeCutDeriveNew( pCut, pCutNew, pCut->pArray[k], iLeaf1, iLeaf0 ); + else + Ivy_NodeCutDeriveNew( pCut, pCutNew, pCut->pArray[k], iLeaf0, iLeaf1 ); + Ivy_NodeCutFindOrAddFilter( pCutStore, pCutNew ); + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + break; + } + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + break; + } + Ivy_NodeCompactCuts( pCutStore ); +// Ivy_NodePrintCuts( pCutStore ); + return pCutStore; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManTestCutsAll( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i, nCutsCut, nCutsTotal, nNodeTotal, nNodeOver; + int clk = clock(); + nNodeTotal = nNodeOver = 0; + nCutsTotal = -Ivy_ManNodeNum(p); + Ivy_ManForEachObj( p, pObj, i ) + { + if ( !Ivy_ObjIsNode(pObj) ) + continue; + nCutsCut = Ivy_NodeFindCutsAll( p, pObj, 5 )->nCuts; + nCutsTotal += nCutsCut; + nNodeOver += (nCutsCut == IVY_CUT_LIMIT); + nNodeTotal++; + } + printf( "Total cuts = %6d. Trivial = %6d. Nodes = %6d. Satur = %6d. ", + nCutsTotal, Ivy_ManPiNum(p) + Ivy_ManNodeNum(p), nNodeTotal, nNodeOver ); + PRT( "Time", clock() - clk ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyCutTrav.c b/src/aig/ivy/ivyCutTrav.c new file mode 100644 index 00000000..ea57c9f5 --- /dev/null +++ b/src/aig/ivy/ivyCutTrav.c @@ -0,0 +1,473 @@ +/**CFile**************************************************************** + + FileName [ivyCutTrav.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyCutTrav.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static unsigned * Ivy_NodeCutElementary( Vec_Int_t * vStore, int nWords, int NodeId ); +static void Ivy_NodeComputeVolume( Ivy_Obj_t * pObj, int nNodeLimit, Vec_Ptr_t * vNodes, Vec_Ptr_t * vFront ); +static void Ivy_NodeFindCutsMerge( Vec_Ptr_t * vCuts0, Vec_Ptr_t * vCuts1, Vec_Ptr_t * vCuts, int nLeaves, int nWords, Vec_Int_t * vStore ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes cuts for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Store_t * Ivy_NodeFindCutsTravAll( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves, int nNodeLimit, + Vec_Ptr_t * vNodes, Vec_Ptr_t * vFront, Vec_Int_t * vStore, Vec_Vec_t * vBitCuts ) +{ + static Ivy_Store_t CutStore, * pCutStore = &CutStore; + Vec_Ptr_t * vCuts, * vCuts0, * vCuts1; + unsigned * pBitCut; + Ivy_Obj_t * pLeaf; + Ivy_Cut_t * pCut; + int i, k, nWords, nNodes; + + assert( nLeaves <= IVY_CUT_INPUT ); + + // find the given number of nodes in the TFI + Ivy_NodeComputeVolume( pObj, nNodeLimit - 1, vNodes, vFront ); + nNodes = Vec_PtrSize(vNodes); +// assert( nNodes <= nNodeLimit ); + + // make sure vBitCuts has enough room + Vec_VecExpand( vBitCuts, nNodes-1 ); + Vec_VecClear( vBitCuts ); + + // prepare the memory manager + Vec_IntClear( vStore ); + Vec_IntGrow( vStore, 64000 ); + + // set elementary cuts for the leaves + nWords = Extra_BitWordNum( nNodes ); + Vec_PtrForEachEntry( vFront, pLeaf, i ) + { + assert( Ivy_ObjTravId(pLeaf) < nNodes ); + // get the new bitcut + pBitCut = Ivy_NodeCutElementary( vStore, nWords, Ivy_ObjTravId(pLeaf) ); + // set it as the cut of this leaf + Vec_VecPush( vBitCuts, Ivy_ObjTravId(pLeaf), pBitCut ); + } + + // compute the cuts for each node + Vec_PtrForEachEntry( vNodes, pLeaf, i ) + { + // skip the leaves + vCuts = Vec_VecEntry( vBitCuts, Ivy_ObjTravId(pLeaf) ); + if ( Vec_PtrSize(vCuts) > 0 ) + continue; + // add elementary cut + pBitCut = Ivy_NodeCutElementary( vStore, nWords, Ivy_ObjTravId(pLeaf) ); + // set it as the cut of this leaf + Vec_VecPush( vBitCuts, Ivy_ObjTravId(pLeaf), pBitCut ); + // get the fanin cuts + vCuts0 = Vec_VecEntry( vBitCuts, Ivy_ObjTravId( Ivy_ObjFanin0(pLeaf) ) ); + vCuts1 = Vec_VecEntry( vBitCuts, Ivy_ObjTravId( Ivy_ObjFanin1(pLeaf) ) ); + assert( Vec_PtrSize(vCuts0) > 0 ); + assert( Vec_PtrSize(vCuts1) > 0 ); + // merge the cuts + Ivy_NodeFindCutsMerge( vCuts0, vCuts1, vCuts, nLeaves, nWords, vStore ); + } + + // start the structure + pCutStore->nCuts = 0; + pCutStore->nCutsMax = IVY_CUT_LIMIT; + // collect the cuts of the root node + vCuts = Vec_VecEntry( vBitCuts, Ivy_ObjTravId(pObj) ); + Vec_PtrForEachEntry( vCuts, pBitCut, i ) + { + pCut = pCutStore->pCuts + pCutStore->nCuts++; + pCut->nSize = 0; + pCut->nSizeMax = nLeaves; + pCut->uHash = 0; + for ( k = 0; k < nNodes; k++ ) + if ( Extra_TruthHasBit(pBitCut, k) ) + pCut->pArray[ pCut->nSize++ ] = Ivy_ObjId( Vec_PtrEntry(vNodes, k) ); + assert( pCut->nSize <= nLeaves ); + if ( pCutStore->nCuts == pCutStore->nCutsMax ) + break; + } + + // clean the travIds + Vec_PtrForEachEntry( vNodes, pLeaf, i ) + pLeaf->TravId = 0; + return pCutStore; +} + +/**Function************************************************************* + + Synopsis [Creates elementary bit-cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Ivy_NodeCutElementary( Vec_Int_t * vStore, int nWords, int NodeId ) +{ + unsigned * pBitCut; + pBitCut = Vec_IntFetch( vStore, nWords ); + memset( pBitCut, 0, 4 * nWords ); + Extra_TruthSetBit( pBitCut, NodeId ); + return pBitCut; +} + +/**Function************************************************************* + + Synopsis [Compares the node by level.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_CompareNodesByLevel( Ivy_Obj_t ** ppObj1, Ivy_Obj_t ** ppObj2 ) +{ + Ivy_Obj_t * pObj1 = *ppObj1; + Ivy_Obj_t * pObj2 = *ppObj2; + if ( pObj1->Level < pObj2->Level ) + return -1; + if ( pObj1->Level > pObj2->Level ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Mark all nodes up to the given depth.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeComputeVolumeTrav1_rec( Ivy_Obj_t * pObj, int Depth ) +{ + if ( Ivy_ObjIsCi(pObj) || Depth == 0 ) + return; + Ivy_NodeComputeVolumeTrav1_rec( Ivy_ObjFanin0(pObj), Depth - 1 ); + Ivy_NodeComputeVolumeTrav1_rec( Ivy_ObjFanin1(pObj), Depth - 1 ); + pObj->fMarkA = 1; +} + +/**Function************************************************************* + + Synopsis [Collect the marked nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeComputeVolumeTrav2_rec( Ivy_Obj_t * pObj, Vec_Ptr_t * vNodes ) +{ + if ( !pObj->fMarkA ) + return; + Ivy_NodeComputeVolumeTrav2_rec( Ivy_ObjFanin0(pObj), vNodes ); + Ivy_NodeComputeVolumeTrav2_rec( Ivy_ObjFanin1(pObj), vNodes ); + Vec_PtrPush( vNodes, pObj ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeComputeVolume( Ivy_Obj_t * pObj, int nNodeLimit, Vec_Ptr_t * vNodes, Vec_Ptr_t * vFront ) +{ + Ivy_Obj_t * pTemp, * pFanin; + int i, nNodes; + // mark nodes up to the given depth + Ivy_NodeComputeVolumeTrav1_rec( pObj, 6 ); + // collect the marked nodes + Vec_PtrClear( vFront ); + Ivy_NodeComputeVolumeTrav2_rec( pObj, vFront ); + // find the fanins that are not marked + Vec_PtrClear( vNodes ); + Vec_PtrForEachEntry( vFront, pTemp, i ) + { + pFanin = Ivy_ObjFanin0(pTemp); + if ( !pFanin->fMarkA ) + { + pFanin->fMarkA = 1; + Vec_PtrPush( vNodes, pFanin ); + } + pFanin = Ivy_ObjFanin1(pTemp); + if ( !pFanin->fMarkA ) + { + pFanin->fMarkA = 1; + Vec_PtrPush( vNodes, pFanin ); + } + } + // remember the number of nodes in the frontier + nNodes = Vec_PtrSize( vNodes ); + // add the remaining nodes + Vec_PtrForEachEntry( vFront, pTemp, i ) + Vec_PtrPush( vNodes, pTemp ); + // unmark the nodes + Vec_PtrForEachEntry( vNodes, pTemp, i ) + { + pTemp->fMarkA = 0; + pTemp->TravId = i; + } + // collect the frontier nodes + Vec_PtrClear( vFront ); + Vec_PtrForEachEntryStop( vNodes, pTemp, i, nNodes ) + Vec_PtrPush( vFront, pTemp ); +// printf( "%d ", Vec_PtrSize(vNodes) ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeComputeVolume2( Ivy_Obj_t * pObj, int nNodeLimit, Vec_Ptr_t * vNodes, Vec_Ptr_t * vFront ) +{ + Ivy_Obj_t * pLeaf, * pPivot, * pFanin; + int LevelMax, i; + assert( Ivy_ObjIsNode(pObj) ); + // clear arrays + Vec_PtrClear( vNodes ); + Vec_PtrClear( vFront ); + // add the root + pObj->fMarkA = 1; + Vec_PtrPush( vNodes, pObj ); + Vec_PtrPush( vFront, pObj ); + // expand node with maximum level + LevelMax = pObj->Level; + do { + // get the node to expand + pPivot = NULL; + Vec_PtrForEachEntryReverse( vFront, pLeaf, i ) + { + if ( (int)pLeaf->Level == LevelMax ) + { + pPivot = pLeaf; + break; + } + } + // decrease level if we did not find the node + if ( pPivot == NULL ) + { + if ( --LevelMax == 0 ) + break; + continue; + } + // the node to expand is found + // remove it from frontier + Vec_PtrRemove( vFront, pPivot ); + // add fanins + pFanin = Ivy_ObjFanin0(pPivot); + if ( !pFanin->fMarkA ) + { + pFanin->fMarkA = 1; + Vec_PtrPush( vNodes, pFanin ); + Vec_PtrPush( vFront, pFanin ); + } + pFanin = Ivy_ObjFanin1(pPivot); + if ( pFanin && !pFanin->fMarkA ) + { + pFanin->fMarkA = 1; + Vec_PtrPush( vNodes, pFanin ); + Vec_PtrPush( vFront, pFanin ); + } + // quit if we collected enough nodes + } while ( Vec_PtrSize(vNodes) < nNodeLimit ); + + // sort nodes by level + Vec_PtrSort( vNodes, Ivy_CompareNodesByLevel ); + // make sure the nodes are ordered in the increasing number of levels + pFanin = Vec_PtrEntry( vNodes, 0 ); + pPivot = Vec_PtrEntryLast( vNodes ); + assert( pFanin->Level <= pPivot->Level ); + + // clean the marks and remember node numbers in the TravId + Vec_PtrForEachEntry( vNodes, pFanin, i ) + { + pFanin->fMarkA = 0; + pFanin->TravId = i; + } +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Extra_TruthOrWords( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nWords ) +{ + int w; + for ( w = nWords-1; w >= 0; w-- ) + pOut[w] = pIn0[w] | pIn1[w]; +} +static inline int Extra_TruthIsImplyWords( unsigned * pIn1, unsigned * pIn2, int nWords ) +{ + int w; + for ( w = nWords-1; w >= 0; w-- ) + if ( pIn1[w] & ~pIn2[w] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Merges two sets of bit-cuts at a node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeFindCutsMerge( Vec_Ptr_t * vCuts0, Vec_Ptr_t * vCuts1, Vec_Ptr_t * vCuts, + int nLeaves, int nWords, Vec_Int_t * vStore ) +{ + unsigned * pBitCut, * pBitCut0, * pBitCut1, * pBitCutTest; + int i, k, c, w, Counter; + // iterate through the cut pairs + Vec_PtrForEachEntry( vCuts0, pBitCut0, i ) + Vec_PtrForEachEntry( vCuts1, pBitCut1, k ) + { + // skip infeasible cuts + Counter = 0; + for ( w = 0; w < nWords; w++ ) + { + Counter += Extra_WordCountOnes( pBitCut0[w] | pBitCut1[w] ); + if ( Counter > nLeaves ) + break; + } + if ( Counter > nLeaves ) + continue; + // the new cut is feasible - create it + pBitCutTest = Vec_IntFetch( vStore, nWords ); + Extra_TruthOrWords( pBitCutTest, pBitCut0, pBitCut1, nWords ); + // filter contained cuts; try to find containing cut + w = 0; + Vec_PtrForEachEntry( vCuts, pBitCut, c ) + { + if ( Extra_TruthIsImplyWords( pBitCut, pBitCutTest, nWords ) ) + break; + if ( Extra_TruthIsImplyWords( pBitCutTest, pBitCut, nWords ) ) + continue; + Vec_PtrWriteEntry( vCuts, w++, pBitCut ); + } + if ( c != Vec_PtrSize(vCuts) ) + continue; + Vec_PtrShrink( vCuts, w ); + // add the cut + Vec_PtrPush( vCuts, pBitCutTest ); + } +} + +/**Function************************************************************* + + Synopsis [Compute the set of all cuts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManTestCutsTravAll( Ivy_Man_t * p ) +{ + Ivy_Store_t * pStore; + Ivy_Obj_t * pObj; + Vec_Ptr_t * vNodes, * vFront; + Vec_Int_t * vStore; + Vec_Vec_t * vBitCuts; + int i, nCutsCut, nCutsTotal, nNodeTotal, nNodeOver; + int clk = clock(); + + vNodes = Vec_PtrAlloc( 100 ); + vFront = Vec_PtrAlloc( 100 ); + vStore = Vec_IntAlloc( 100 ); + vBitCuts = Vec_VecAlloc( 100 ); + + nNodeTotal = nNodeOver = 0; + nCutsTotal = -Ivy_ManNodeNum(p); + Ivy_ManForEachObj( p, pObj, i ) + { + if ( !Ivy_ObjIsNode(pObj) ) + continue; + pStore = Ivy_NodeFindCutsTravAll( p, pObj, 4, 60, vNodes, vFront, vStore, vBitCuts ); + nCutsCut = pStore->nCuts; + nCutsTotal += nCutsCut; + nNodeOver += (nCutsCut == IVY_CUT_LIMIT); + nNodeTotal++; + } + printf( "Total cuts = %6d. Trivial = %6d. Nodes = %6d. Satur = %6d. ", + nCutsTotal, Ivy_ManPiNum(p) + Ivy_ManNodeNum(p), nNodeTotal, nNodeOver ); + PRT( "Time", clock() - clk ); + + Vec_PtrFree( vNodes ); + Vec_PtrFree( vFront ); + Vec_IntFree( vStore ); + Vec_VecFree( vBitCuts ); + +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyDfs.c b/src/aig/ivy/ivyDfs.c new file mode 100644 index 00000000..c27cba31 --- /dev/null +++ b/src/aig/ivy/ivyDfs.c @@ -0,0 +1,493 @@ +/**CFile**************************************************************** + + FileName [ivyDfs.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [DFS collection procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyDfs.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Collects nodes in the DFS order.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManDfs_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, Vec_Int_t * vNodes ) +{ + if ( Ivy_ObjIsMarkA(pObj) ) + return; + Ivy_ObjSetMarkA(pObj); + if ( Ivy_ObjIsConst1(pObj) || Ivy_ObjIsCi(pObj) ) + { + if ( p->pHaig == NULL && pObj->pEquiv ) + Ivy_ManDfs_rec( p, Ivy_Regular(pObj->pEquiv), vNodes ); + return; + } +//printf( "visiting node %d\n", pObj->Id ); +/* + if ( pObj->Id == 87 || pObj->Id == 90 ) + { + int y = 0; + } +*/ + assert( Ivy_ObjIsBuf(pObj) || Ivy_ObjIsAnd(pObj) || Ivy_ObjIsExor(pObj) ); + Ivy_ManDfs_rec( p, Ivy_ObjFanin0(pObj), vNodes ); + if ( !Ivy_ObjIsBuf(pObj) ) + Ivy_ManDfs_rec( p, Ivy_ObjFanin1(pObj), vNodes ); + if ( p->pHaig == NULL && pObj->pEquiv ) + Ivy_ManDfs_rec( p, Ivy_Regular(pObj->pEquiv), vNodes ); + Vec_IntPush( vNodes, pObj->Id ); + +//printf( "adding node %d with fanins %d and %d and equiv %d (refs = %d)\n", +// pObj->Id, Ivy_ObjFanin0(pObj)->Id, Ivy_ObjFanin1(pObj)->Id, +// pObj->pEquiv? Ivy_Regular(pObj->pEquiv)->Id: -1, Ivy_ObjRefs(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Collects AND/EXOR nodes in the DFS order from CIs to COs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Ivy_ManDfs( Ivy_Man_t * p ) +{ + Vec_Int_t * vNodes; + Ivy_Obj_t * pObj; + int i; + assert( Ivy_ManLatchNum(p) == 0 ); + // make sure the nodes are not marked + Ivy_ManForEachObj( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); + // collect the nodes + vNodes = Vec_IntAlloc( Ivy_ManNodeNum(p) ); + Ivy_ManForEachPo( p, pObj, i ) + Ivy_ManDfs_rec( p, Ivy_ObjFanin0(pObj), vNodes ); + // unmark the collected nodes +// Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) +// Ivy_ObjClearMarkA(pObj); + Ivy_ManForEachObj( p, pObj, i ) + Ivy_ObjClearMarkA(pObj); + // make sure network does not have dangling nodes + assert( Vec_IntSize(vNodes) == Ivy_ManNodeNum(p) + Ivy_ManBufNum(p) ); + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects AND/EXOR nodes in the DFS order from CIs to COs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Ivy_ManDfsSeq( Ivy_Man_t * p, Vec_Int_t ** pvLatches ) +{ + Vec_Int_t * vNodes, * vLatches; + Ivy_Obj_t * pObj; + int i; +// assert( Ivy_ManLatchNum(p) > 0 ); + // make sure the nodes are not marked + Ivy_ManForEachObj( p, pObj, i ) + assert( !pObj->fMarkA && !pObj->fMarkB ); + // collect the latches + vLatches = Vec_IntAlloc( Ivy_ManLatchNum(p) ); + Ivy_ManForEachLatch( p, pObj, i ) + Vec_IntPush( vLatches, pObj->Id ); + // collect the nodes + vNodes = Vec_IntAlloc( Ivy_ManNodeNum(p) ); + Ivy_ManForEachPo( p, pObj, i ) + Ivy_ManDfs_rec( p, Ivy_ObjFanin0(pObj), vNodes ); + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + Ivy_ManDfs_rec( p, Ivy_ObjFanin0(pObj), vNodes ); + // unmark the collected nodes +// Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) +// Ivy_ObjClearMarkA(pObj); + Ivy_ManForEachObj( p, pObj, i ) + Ivy_ObjClearMarkA(pObj); + // make sure network does not have dangling nodes +// assert( Vec_IntSize(vNodes) == Ivy_ManNodeNum(p) + Ivy_ManBufNum(p) ); + +// temporary!!! + + if ( pvLatches == NULL ) + Vec_IntFree( vLatches ); + else + *pvLatches = vLatches; + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Collects nodes in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCollectCone_rec( Ivy_Obj_t * pObj, Vec_Ptr_t * vCone ) +{ + if ( pObj->fMarkA ) + return; + if ( Ivy_ObjIsBuf(pObj) ) + { + Ivy_ManCollectCone_rec( Ivy_ObjFanin0(pObj), vCone ); + Vec_PtrPush( vCone, pObj ); + return; + } + assert( Ivy_ObjIsNode(pObj) ); + Ivy_ManCollectCone_rec( Ivy_ObjFanin0(pObj), vCone ); + Ivy_ManCollectCone_rec( Ivy_ObjFanin1(pObj), vCone ); + Vec_PtrPushUnique( vCone, pObj ); +} + +/**Function************************************************************* + + Synopsis [Collects nodes in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCollectCone( Ivy_Obj_t * pObj, Vec_Ptr_t * vFront, Vec_Ptr_t * vCone ) +{ + Ivy_Obj_t * pTemp; + int i; + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjIsNode(pObj) ); + // mark the nodes + Vec_PtrForEachEntry( vFront, pTemp, i ) + Ivy_Regular(pTemp)->fMarkA = 1; + assert( pObj->fMarkA == 0 ); + // collect the cone + Vec_PtrClear( vCone ); + Ivy_ManCollectCone_rec( pObj, vCone ); + // unmark the nodes + Vec_PtrForEachEntry( vFront, pTemp, i ) + Ivy_Regular(pTemp)->fMarkA = 0; +} + +/**Function************************************************************* + + Synopsis [Returns the nodes by level.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Vec_t * Ivy_ManLevelize( Ivy_Man_t * p ) +{ + Vec_Vec_t * vNodes; + Ivy_Obj_t * pObj; + int i; + vNodes = Vec_VecAlloc( 100 ); + Ivy_ManForEachObj( p, pObj, i ) + { + assert( !Ivy_ObjIsBuf(pObj) ); + if ( Ivy_ObjIsNode(pObj) ) + Vec_VecPush( vNodes, pObj->Level, pObj ); + } + return vNodes; +} + +/**Function************************************************************* + + Synopsis [Computes required levels for each node.] + + Description [Assumes topological ordering of the nodes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Ivy_ManRequiredLevels( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + Vec_Int_t * vLevelsR; + Vec_Vec_t * vNodes; + int i, k, Level, LevelMax; + assert( p->vRequired == NULL ); + // start the required times + vLevelsR = Vec_IntStart( Ivy_ManObjIdMax(p) + 1 ); + // iterate through the nodes in the reverse order + vNodes = Ivy_ManLevelize( p ); + Vec_VecForEachEntryReverseReverse( vNodes, pObj, i, k ) + { + Level = Vec_IntEntry( vLevelsR, pObj->Id ) + 1 + Ivy_ObjIsExor(pObj); + if ( Vec_IntEntry( vLevelsR, Ivy_ObjFaninId0(pObj) ) < Level ) + Vec_IntWriteEntry( vLevelsR, Ivy_ObjFaninId0(pObj), Level ); + if ( Vec_IntEntry( vLevelsR, Ivy_ObjFaninId1(pObj) ) < Level ) + Vec_IntWriteEntry( vLevelsR, Ivy_ObjFaninId1(pObj), Level ); + } + Vec_VecFree( vNodes ); + // convert it into the required times + LevelMax = Ivy_ManLevels( p ); +//printf( "max %5d\n",LevelMax ); + Ivy_ManForEachObj( p, pObj, i ) + { + Level = Vec_IntEntry( vLevelsR, pObj->Id ); + Vec_IntWriteEntry( vLevelsR, pObj->Id, LevelMax - Level ); +//printf( "%5d : %5d %5d\n", pObj->Id, Level, LevelMax - Level ); + } + p->vRequired = vLevelsR; + return vLevelsR; +} + +/**Function************************************************************* + + Synopsis [Recursively detects combinational loops.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManIsAcyclic_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + // skip the node if it is already visited + if ( Ivy_ObjIsTravIdPrevious(p, pObj) ) + return 1; + // check if the node is part of the combinational loop + if ( Ivy_ObjIsTravIdCurrent(p, pObj) ) + { + fprintf( stdout, "Manager contains combinational loop!\n" ); + fprintf( stdout, "Node \"%d\" is encountered twice on the following path:\n", Ivy_ObjId(pObj) ); + fprintf( stdout, " %d", Ivy_ObjId(pObj) ); + return 0; + } + // mark this node as a node on the current path + Ivy_ObjSetTravIdCurrent( p, pObj ); + // explore equivalent nodes if pObj is the main node + if ( p->pHaig == NULL && pObj->pEquiv && Ivy_ObjRefs(pObj) > 0 ) + { + Ivy_Obj_t * pTemp; + assert( !Ivy_IsComplement(pObj->pEquiv) ); + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + { + // traverse the fanin's cone searching for the loop + if ( !Ivy_ManIsAcyclic_rec(p, pTemp) ) + { + // return as soon as the loop is detected + fprintf( stdout, " -> (%d", Ivy_ObjId(pObj) ); + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + fprintf( stdout, " %d", Ivy_ObjId(pTemp) ); + fprintf( stdout, ")" ); + return 0; + } + } + } + // quite if it is a CI node + if ( Ivy_ObjIsCi(pObj) || Ivy_ObjIsConst1(pObj) ) + { + // mark this node as a visited node + Ivy_ObjSetTravIdPrevious( p, pObj ); + return 1; + } + assert( Ivy_ObjIsNode(pObj) || Ivy_ObjIsBuf(pObj) ); + // traverse the fanin's cone searching for the loop + if ( !Ivy_ManIsAcyclic_rec(p, Ivy_ObjFanin0(pObj)) ) + { + // return as soon as the loop is detected + fprintf( stdout, " -> %d", Ivy_ObjId(pObj) ); + return 0; + } + // traverse the fanin's cone searching for the loop + if ( Ivy_ObjIsNode(pObj) && !Ivy_ManIsAcyclic_rec(p, Ivy_ObjFanin1(pObj)) ) + { + // return as soon as the loop is detected + fprintf( stdout, " -> %d", Ivy_ObjId(pObj) ); + return 0; + } + // mark this node as a visited node + Ivy_ObjSetTravIdPrevious( p, pObj ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Detects combinational loops.] + + Description [This procedure is based on the idea suggested by Donald Chai. + As we traverse the network and visit the nodes, we need to distinquish + three types of nodes: (1) those that are visited for the first time, + (2) those that have been visited in this traversal but are currently not + on the traversal path, (3) those that have been visited and are currently + on the travesal path. When the node of type (3) is encountered, it means + that there is a combinational loop. To mark the three types of nodes, + two new values of the traversal IDs are used.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManIsAcyclic( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int fAcyclic, i; + // set the traversal ID for this DFS ordering + Ivy_ManIncrementTravId( p ); + Ivy_ManIncrementTravId( p ); + // pObj->TravId == pNet->nTravIds means "pObj is on the path" + // pObj->TravId == pNet->nTravIds - 1 means "pObj is visited but is not on the path" + // pObj->TravId < pNet->nTravIds - 1 means "pObj is not visited" + // traverse the network to detect cycles + fAcyclic = 1; + Ivy_ManForEachCo( p, pObj, i ) + { + // traverse the output logic cone + if ( fAcyclic = Ivy_ManIsAcyclic_rec(p, Ivy_ObjFanin0(pObj)) ) + continue; + // stop as soon as the first loop is detected + fprintf( stdout, " (cone of %s \"%d\")\n", Ivy_ObjIsLatch(pObj)? "latch" : "PO", Ivy_ObjId(pObj) ); + break; + } + return fAcyclic; +} + +/**Function************************************************************* + + Synopsis [Sets the levels of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManSetLevels_rec( Ivy_Obj_t * pObj, int fHaig ) +{ + // quit if the node is visited + if ( Ivy_ObjIsMarkA(pObj) ) + return pObj->Level; + Ivy_ObjSetMarkA(pObj); + // quit if this is a CI + if ( Ivy_ObjIsConst1(pObj) || Ivy_ObjIsCi(pObj) ) + return 0; + assert( Ivy_ObjIsBuf(pObj) || Ivy_ObjIsAnd(pObj) || Ivy_ObjIsExor(pObj) ); + // get levels of the fanins + Ivy_ManSetLevels_rec( Ivy_ObjFanin0(pObj), fHaig ); + if ( !Ivy_ObjIsBuf(pObj) ) + Ivy_ManSetLevels_rec( Ivy_ObjFanin1(pObj), fHaig ); + // get level of the node + if ( Ivy_ObjIsBuf(pObj) ) + pObj->Level = 1 + Ivy_ObjFanin0(pObj)->Level; + else if ( Ivy_ObjIsNode(pObj) ) + pObj->Level = Ivy_ObjLevelNew( pObj ); + else assert( 0 ); + // get level of other choices + if ( fHaig && pObj->pEquiv && Ivy_ObjRefs(pObj) > 0 ) + { + Ivy_Obj_t * pTemp; + unsigned LevelMax = pObj->Level; + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + { + Ivy_ManSetLevels_rec( pTemp, fHaig ); + LevelMax = IVY_MAX( LevelMax, pTemp->Level ); + } + // get this level + pObj->Level = LevelMax; + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + pTemp->Level = LevelMax; + } + return pObj->Level; +} + +/**Function************************************************************* + + Synopsis [Sets the levels of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManSetLevels( Ivy_Man_t * p, int fHaig ) +{ + Ivy_Obj_t * pObj; + int i, LevelMax; + // check if CIs have choices + if ( fHaig ) + { + Ivy_ManForEachCi( p, pObj, i ) + if ( pObj->pEquiv ) + printf( "CI %d has a choice, which will not be visualized.\n", pObj->Id ); + } + // clean the levels + Ivy_ManForEachObj( p, pObj, i ) + pObj->Level = 0; + // compute the levels + LevelMax = 0; + Ivy_ManForEachCo( p, pObj, i ) + { + Ivy_ManSetLevels_rec( Ivy_ObjFanin0(pObj), fHaig ); + LevelMax = IVY_MAX( LevelMax, (int)Ivy_ObjFanin0(pObj)->Level ); + } + // compute levels of nodes without fanout + Ivy_ManForEachObj( p, pObj, i ) + if ( (Ivy_ObjIsNode(pObj) || Ivy_ObjIsBuf(pObj)) && Ivy_ObjRefs(pObj) == 0 ) + { + Ivy_ManSetLevels_rec( pObj, fHaig ); + LevelMax = IVY_MAX( LevelMax, (int)pObj->Level ); + } + // clean the marks + Ivy_ManForEachObj( p, pObj, i ) + Ivy_ObjClearMarkA(pObj); + return LevelMax; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyDsd.c b/src/aig/ivy/ivyDsd.c new file mode 100644 index 00000000..3b8a2e68 --- /dev/null +++ b/src/aig/ivy/ivyDsd.c @@ -0,0 +1,819 @@ +/**CFile**************************************************************** + + FileName [ivyDsd.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Disjoint-support decomposition.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyDsd.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// decomposition types +typedef enum { + IVY_DEC_PI, // 0: var + IVY_DEC_CONST1, // 1: CONST1 + IVY_DEC_BUF, // 2: BUF + IVY_DEC_AND, // 3: AND + IVY_DEC_EXOR, // 4: EXOR + IVY_DEC_MUX, // 5: MUX + IVY_DEC_MAJ, // 6: MAJ + IVY_DEC_PRIME // 7: undecomposable +} Ivy_DecType_t; + +typedef struct Ivy_Dec_t_ Ivy_Dec_t; +struct Ivy_Dec_t_ +{ + unsigned Type : 4; // the node type (PI, CONST1, AND, EXOR, MUX, PRIME) + unsigned fCompl : 1; // shows if node is complemented (root node only) + unsigned nFans : 3; // the number of fanins + unsigned Fan0 : 4; // fanin 0 + unsigned Fan1 : 4; // fanin 1 + unsigned Fan2 : 4; // fanin 2 + unsigned Fan3 : 4; // fanin 3 + unsigned Fan4 : 4; // fanin 4 + unsigned Fan5 : 4; // fanin 5 +}; + +static inline int Ivy_DecToInt( Ivy_Dec_t Node ) { return *((int *)&Node); } +static inline Ivy_Dec_t Ivy_IntToDec( int Node ) { return *((Ivy_Dec_t *)&Node); } +static inline void Ivy_DecClear( Ivy_Dec_t * pNode ) { *((int *)pNode) = 0; } + + +static unsigned s_Masks[6][2] = { + { 0x55555555, 0xAAAAAAAA }, + { 0x33333333, 0xCCCCCCCC }, + { 0x0F0F0F0F, 0xF0F0F0F0 }, + { 0x00FF00FF, 0xFF00FF00 }, + { 0x0000FFFF, 0xFFFF0000 }, + { 0x00000000, 0xFFFFFFFF } +}; + +static inline int Ivy_TruthWordCountOnes( unsigned uWord ) +{ + uWord = (uWord & 0x55555555) + ((uWord>>1) & 0x55555555); + uWord = (uWord & 0x33333333) + ((uWord>>2) & 0x33333333); + uWord = (uWord & 0x0F0F0F0F) + ((uWord>>4) & 0x0F0F0F0F); + uWord = (uWord & 0x00FF00FF) + ((uWord>>8) & 0x00FF00FF); + return (uWord & 0x0000FFFF) + (uWord>>16); +} + +static inline int Ivy_TruthCofactorIsConst( unsigned uTruth, int Var, int Cof, int Const ) +{ + if ( Const == 0 ) + return (uTruth & s_Masks[Var][Cof]) == 0; + else + return (uTruth & s_Masks[Var][Cof]) == s_Masks[Var][Cof]; +} + +static inline int Ivy_TruthCofactorIsOne( unsigned uTruth, int Var ) +{ + return (uTruth & s_Masks[Var][0]) == 0; +} + +static inline unsigned Ivy_TruthCofactor( unsigned uTruth, int Var ) +{ + unsigned uCofactor = uTruth & s_Masks[Var >> 1][(Var & 1) == 0]; + int Shift = (1 << (Var >> 1)); + if ( Var & 1 ) + return uCofactor | (uCofactor << Shift); + return uCofactor | (uCofactor >> Shift); +} + +static inline unsigned Ivy_TruthCofactor2( unsigned uTruth, int Var0, int Var1 ) +{ + return Ivy_TruthCofactor( Ivy_TruthCofactor(uTruth, Var0), Var1 ); +} + +// returns 1 if the truth table depends on this var (var is regular interger var) +static inline int Ivy_TruthDepends( unsigned uTruth, int Var ) +{ + return Ivy_TruthCofactor(uTruth, Var << 1) != Ivy_TruthCofactor(uTruth, (Var << 1) | 1); +} + +static inline void Ivy_DecSetVar( Ivy_Dec_t * pNode, int iNum, unsigned Var ) +{ + assert( iNum >= 0 && iNum <= 5 ); + switch( iNum ) + { + case 0: pNode->Fan0 = Var; break; + case 1: pNode->Fan1 = Var; break; + case 2: pNode->Fan2 = Var; break; + case 3: pNode->Fan3 = Var; break; + case 4: pNode->Fan4 = Var; break; + case 5: pNode->Fan5 = Var; break; + } +} + +static inline unsigned Ivy_DecGetVar( Ivy_Dec_t * pNode, int iNum ) +{ + assert( iNum >= 0 && iNum <= 5 ); + switch( iNum ) + { + case 0: return pNode->Fan0; + case 1: return pNode->Fan1; + case 2: return pNode->Fan2; + case 3: return pNode->Fan3; + case 4: return pNode->Fan4; + case 5: return pNode->Fan5; + } + return ~0; +} + +static int Ivy_TruthDecompose_rec( unsigned uTruth, Vec_Int_t * vTree ); +static int Ivy_TruthRecognizeMuxMaj( unsigned uTruth, int * pSupp, int nSupp, Vec_Int_t * vTree ); + +//int nTruthDsd; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes DSD of truth table of 5 variables or less.] + + Description [Returns 1 if the function is a constant or is fully + DSD decomposable using AND/EXOR/MUX gates.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_TruthDsd( unsigned uTruth, Vec_Int_t * vTree ) +{ + Ivy_Dec_t Node; + int i, RetValue; + // set the PI variables + Vec_IntClear( vTree ); + for ( i = 0; i < 5; i++ ) + Vec_IntPush( vTree, 0 ); + // check if it is a constant + if ( uTruth == 0 || ~uTruth == 0 ) + { + Ivy_DecClear( &Node ); + Node.Type = IVY_DEC_CONST1; + Node.fCompl = (uTruth == 0); + Vec_IntPush( vTree, Ivy_DecToInt(Node) ); + return 1; + } + // perform the decomposition + RetValue = Ivy_TruthDecompose_rec( uTruth, vTree ); + if ( RetValue == -1 ) + return 0; + // get the topmost node + if ( (RetValue >> 1) < 5 ) + { // add buffer + Ivy_DecClear( &Node ); + Node.Type = IVY_DEC_BUF; + Node.fCompl = (RetValue & 1); + Node.Fan0 = ((RetValue >> 1) << 1); + Vec_IntPush( vTree, Ivy_DecToInt(Node) ); + } + else if ( RetValue & 1 ) + { // check if the topmost node has to be complemented + Node = Ivy_IntToDec( Vec_IntPop(vTree) ); + assert( Node.fCompl == 0 ); + Node.fCompl = (RetValue & 1); + Vec_IntPush( vTree, Ivy_DecToInt(Node) ); + } + if ( uTruth != Ivy_TruthDsdCompute(vTree) ) + printf( "Verification failed.\n" ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Computes DSD of truth table.] + + Description [Returns the number of topmost decomposition node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_TruthDecompose_rec( unsigned uTruth, Vec_Int_t * vTree ) +{ + Ivy_Dec_t Node; + int Supp[5], Vars0[5], Vars1[5], Vars2[5], * pVars; + int nSupp, Count0, Count1, Count2, nVars, RetValue, fCompl, i; + unsigned uTruthCof, uCof0, uCof1; + + // get constant confactors + Count0 = Count1 = Count2 = nSupp = 0; + for ( i = 0; i < 5; i++ ) + { + if ( Ivy_TruthCofactorIsConst(uTruth, i, 0, 0) ) + Vars0[Count0++] = (i << 1) | 0; + else if ( Ivy_TruthCofactorIsConst(uTruth, i, 1, 0) ) + Vars0[Count0++] = (i << 1) | 1; + else if ( Ivy_TruthCofactorIsConst(uTruth, i, 0, 1) ) + Vars1[Count1++] = (i << 1) | 0; + else if ( Ivy_TruthCofactorIsConst(uTruth, i, 1, 1) ) + Vars1[Count1++] = (i << 1) | 1; + else + { + uCof0 = Ivy_TruthCofactor( uTruth, (i << 1) | 1 ); + uCof1 = Ivy_TruthCofactor( uTruth, (i << 1) | 0 ); + if ( uCof0 == ~uCof1 ) + Vars2[Count2++] = (i << 1) | 0; + else if ( uCof0 != uCof1 ) + Supp[nSupp++] = i; + } + } + assert( Count0 == 0 || Count1 == 0 ); + assert( Count0 == 0 || Count2 == 0 ); + assert( Count1 == 0 || Count2 == 0 ); + + // consider the case of a single variable + if ( Count0 == 1 && nSupp == 0 ) + return Vars0[0]; + + // consider more complex decompositions + if ( Count0 == 0 && Count1 == 0 && Count2 == 0 ) + return Ivy_TruthRecognizeMuxMaj( uTruth, Supp, nSupp, vTree ); + + // extract the nodes + Ivy_DecClear( &Node ); + if ( Count0 > 0 ) + nVars = Count0, pVars = Vars0, Node.Type = IVY_DEC_AND, fCompl = 0; + else if ( Count1 > 0 ) + nVars = Count1, pVars = Vars1, Node.Type = IVY_DEC_AND, fCompl = 1, uTruth = ~uTruth; + else if ( Count2 > 0 ) + nVars = Count2, pVars = Vars2, Node.Type = IVY_DEC_EXOR, fCompl = 0; + else + assert( 0 ); + Node.nFans = nVars+(nSupp>0); + + // compute cofactor + uTruthCof = uTruth; + for ( i = 0; i < nVars; i++ ) + { + uTruthCof = Ivy_TruthCofactor( uTruthCof, pVars[i] ); + Ivy_DecSetVar( &Node, i, pVars[i] ); + } + + if ( Node.Type == IVY_DEC_EXOR ) + fCompl ^= ((Node.nFans & 1) == 0); + + if ( nSupp > 0 ) + { + assert( uTruthCof != 0 && ~uTruthCof != 0 ); + // call recursively + RetValue = Ivy_TruthDecompose_rec( uTruthCof, vTree ); + // quit if non-decomposable + if ( RetValue == -1 ) + return -1; + // remove the complement from the child if the node is EXOR + if ( Node.Type == IVY_DEC_EXOR && (RetValue & 1) ) + { + fCompl ^= 1; + RetValue ^= 1; + } + // set the new decomposition + Ivy_DecSetVar( &Node, nVars, RetValue ); + } + else if ( Node.Type == IVY_DEC_EXOR ) + fCompl ^= (uTruthCof == 0); + + Vec_IntPush( vTree, Ivy_DecToInt(Node) ); + return ((Vec_IntSize(vTree)-1) << 1) | fCompl; +} + +/**Function************************************************************* + + Synopsis [Returns a non-negative number if the truth table is a MUX.] + + Description [If the truth table is a MUX, returns the variable as follows: + first, control variable; second, positive cofactor; third, negative cofactor.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_TruthRecognizeMuxMaj( unsigned uTruth, int * pSupp, int nSupp, Vec_Int_t * vTree ) +{ + Ivy_Dec_t Node; + int i, k, RetValue0, RetValue1; + unsigned uCof0, uCof1, Num; + char Count[3]; + assert( nSupp >= 3 ); + // start the node + Ivy_DecClear( &Node ); + Node.Type = IVY_DEC_MUX; + Node.nFans = 3; + // try each of the variables + for ( i = 0; i < nSupp; i++ ) + { + // get the cofactors with respect to these variables + uCof0 = Ivy_TruthCofactor( uTruth, (pSupp[i] << 1) | 1 ); + uCof1 = Ivy_TruthCofactor( uTruth, pSupp[i] << 1 ); + // go through all other variables and make sure + // each of them belongs to the support of one cofactor + for ( k = 0; k < nSupp; k++ ) + { + if ( k == i ) + continue; + if ( Ivy_TruthDepends(uCof0, pSupp[k]) && Ivy_TruthDepends(uCof1, pSupp[k]) ) + break; + } + if ( k < nSupp ) + continue; + // MUX decomposition exists + RetValue0 = Ivy_TruthDecompose_rec( uCof0, vTree ); + if ( RetValue0 == -1 ) + break; + RetValue1 = Ivy_TruthDecompose_rec( uCof1, vTree ); + if ( RetValue1 == -1 ) + break; + // both of them exist; create the node + Ivy_DecSetVar( &Node, 0, pSupp[i] << 1 ); + Ivy_DecSetVar( &Node, 1, RetValue1 ); + Ivy_DecSetVar( &Node, 2, RetValue0 ); + Vec_IntPush( vTree, Ivy_DecToInt(Node) ); + return ((Vec_IntSize(vTree)-1) << 1) | 0; + } + // check majority gate + if ( nSupp > 3 ) + return -1; + if ( Ivy_TruthWordCountOnes(uTruth) != 16 ) + return -1; + // this is a majority gate; determine polarity + Node.Type = IVY_DEC_MAJ; + Count[0] = Count[1] = Count[2] = 0; + for ( i = 0; i < 8; i++ ) + { + Num = 0; + for ( k = 0; k < 3; k++ ) + if ( i & (1 << k) ) + Num |= (1 << pSupp[k]); + assert( Num < 32 ); + if ( (uTruth & (1 << Num)) == 0 ) + continue; + for ( k = 0; k < 3; k++ ) + if ( i & (1 << k) ) + Count[k]++; + } + assert( Count[0] == 1 || Count[0] == 3 ); + assert( Count[1] == 1 || Count[1] == 3 ); + assert( Count[2] == 1 || Count[2] == 3 ); + Ivy_DecSetVar( &Node, 0, (pSupp[0] << 1)|(Count[0] == 1) ); + Ivy_DecSetVar( &Node, 1, (pSupp[1] << 1)|(Count[1] == 1) ); + Ivy_DecSetVar( &Node, 2, (pSupp[2] << 1)|(Count[2] == 1) ); + Vec_IntPush( vTree, Ivy_DecToInt(Node) ); + return ((Vec_IntSize(vTree)-1) << 1) | 0; +} + + +/**Function************************************************************* + + Synopsis [Computes truth table of decomposition tree for verification.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_TruthDsdCompute_rec( int iNode, Vec_Int_t * vTree ) +{ + unsigned uTruthChild, uTruthTotal; + int Var, i; + // get the node + Ivy_Dec_t Node = Ivy_IntToDec( Vec_IntEntry(vTree, iNode) ); + // compute the node function + if ( Node.Type == IVY_DEC_CONST1 ) + return s_Masks[5][ !Node.fCompl ]; + if ( Node.Type == IVY_DEC_PI ) + return s_Masks[iNode][ !Node.fCompl ]; + if ( Node.Type == IVY_DEC_BUF ) + { + uTruthTotal = Ivy_TruthDsdCompute_rec( Node.Fan0 >> 1, vTree ); + return Node.fCompl? ~uTruthTotal : uTruthTotal; + } + if ( Node.Type == IVY_DEC_AND ) + { + uTruthTotal = s_Masks[5][1]; + for ( i = 0; i < (int)Node.nFans; i++ ) + { + Var = Ivy_DecGetVar( &Node, i ); + uTruthChild = Ivy_TruthDsdCompute_rec( Var >> 1, vTree ); + uTruthTotal = (Var & 1)? uTruthTotal & ~uTruthChild : uTruthTotal & uTruthChild; + } + return Node.fCompl? ~uTruthTotal : uTruthTotal; + } + if ( Node.Type == IVY_DEC_EXOR ) + { + uTruthTotal = 0; + for ( i = 0; i < (int)Node.nFans; i++ ) + { + Var = Ivy_DecGetVar( &Node, i ); + uTruthTotal ^= Ivy_TruthDsdCompute_rec( Var >> 1, vTree ); + assert( (Var & 1) == 0 ); + } + return Node.fCompl? ~uTruthTotal : uTruthTotal; + } + assert( Node.fCompl == 0 ); + if ( Node.Type == IVY_DEC_MUX || Node.Type == IVY_DEC_MAJ ) + { + unsigned uTruthChildC, uTruthChild1, uTruthChild0; + int VarC, Var1, Var0; + VarC = Ivy_DecGetVar( &Node, 0 ); + Var1 = Ivy_DecGetVar( &Node, 1 ); + Var0 = Ivy_DecGetVar( &Node, 2 ); + uTruthChildC = Ivy_TruthDsdCompute_rec( VarC >> 1, vTree ); + uTruthChild1 = Ivy_TruthDsdCompute_rec( Var1 >> 1, vTree ); + uTruthChild0 = Ivy_TruthDsdCompute_rec( Var0 >> 1, vTree ); + assert( Node.Type == IVY_DEC_MAJ || (VarC & 1) == 0 ); + uTruthChildC = (VarC & 1)? ~uTruthChildC : uTruthChildC; + uTruthChild1 = (Var1 & 1)? ~uTruthChild1 : uTruthChild1; + uTruthChild0 = (Var0 & 1)? ~uTruthChild0 : uTruthChild0; + if ( Node.Type == IVY_DEC_MUX ) + return (uTruthChildC & uTruthChild1) | (~uTruthChildC & uTruthChild0); + else + return (uTruthChildC & uTruthChild1) | (uTruthChildC & uTruthChild0) | (uTruthChild1 & uTruthChild0); + } + assert( 0 ); + return 0; +} + + +/**Function************************************************************* + + Synopsis [Computes truth table of decomposition tree for verification.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_TruthDsdCompute( Vec_Int_t * vTree ) +{ + return Ivy_TruthDsdCompute_rec( Vec_IntSize(vTree)-1, vTree ); +} + +/**Function************************************************************* + + Synopsis [Prints the decomposition tree.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthDsdPrint_rec( FILE * pFile, int iNode, Vec_Int_t * vTree ) +{ + int Var, i; + // get the node + Ivy_Dec_t Node = Ivy_IntToDec( Vec_IntEntry(vTree, iNode) ); + // compute the node function + if ( Node.Type == IVY_DEC_CONST1 ) + fprintf( pFile, "Const1%s", (Node.fCompl? "\'" : "") ); + else if ( Node.Type == IVY_DEC_PI ) + fprintf( pFile, "%c%s", 'a' + iNode, (Node.fCompl? "\'" : "") ); + else if ( Node.Type == IVY_DEC_BUF ) + { + Ivy_TruthDsdPrint_rec( pFile, Node.Fan0 >> 1, vTree ); + fprintf( pFile, "%s", (Node.fCompl? "\'" : "") ); + } + else if ( Node.Type == IVY_DEC_AND ) + { + fprintf( pFile, "AND(" ); + for ( i = 0; i < (int)Node.nFans; i++ ) + { + Var = Ivy_DecGetVar( &Node, i ); + Ivy_TruthDsdPrint_rec( pFile, Var >> 1, vTree ); + fprintf( pFile, "%s", (Var & 1)? "\'" : "" ); + if ( i != (int)Node.nFans-1 ) + fprintf( pFile, "," ); + } + fprintf( pFile, ")%s", (Node.fCompl? "\'" : "") ); + } + else if ( Node.Type == IVY_DEC_EXOR ) + { + fprintf( pFile, "EXOR(" ); + for ( i = 0; i < (int)Node.nFans; i++ ) + { + Var = Ivy_DecGetVar( &Node, i ); + Ivy_TruthDsdPrint_rec( pFile, Var >> 1, vTree ); + if ( i != (int)Node.nFans-1 ) + fprintf( pFile, "," ); + assert( (Var & 1) == 0 ); + } + fprintf( pFile, ")%s", (Node.fCompl? "\'" : "") ); + } + else if ( Node.Type == IVY_DEC_MUX || Node.Type == IVY_DEC_MAJ ) + { + int VarC, Var1, Var0; + assert( Node.fCompl == 0 ); + VarC = Ivy_DecGetVar( &Node, 0 ); + Var1 = Ivy_DecGetVar( &Node, 1 ); + Var0 = Ivy_DecGetVar( &Node, 2 ); + fprintf( pFile, "%s", (Node.Type == IVY_DEC_MUX)? "MUX(" : "MAJ(" ); + Ivy_TruthDsdPrint_rec( pFile, VarC >> 1, vTree ); + fprintf( pFile, "%s", (VarC & 1)? "\'" : "" ); + fprintf( pFile, "," ); + Ivy_TruthDsdPrint_rec( pFile, Var1 >> 1, vTree ); + fprintf( pFile, "%s", (Var1 & 1)? "\'" : "" ); + fprintf( pFile, "," ); + Ivy_TruthDsdPrint_rec( pFile, Var0 >> 1, vTree ); + fprintf( pFile, "%s", (Var0 & 1)? "\'" : "" ); + fprintf( pFile, ")" ); + } + else assert( 0 ); +} + + +/**Function************************************************************* + + Synopsis [Prints the decomposition tree.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthDsdPrint( FILE * pFile, Vec_Int_t * vTree ) +{ + fprintf( pFile, "F = " ); + Ivy_TruthDsdPrint_rec( pFile, Vec_IntSize(vTree)-1, vTree ); + fprintf( pFile, "\n" ); +} + +/**Function************************************************************* + + Synopsis [Implement DSD in the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ManDsdConstruct_rec( Ivy_Man_t * p, Vec_Int_t * vFront, int iNode, Vec_Int_t * vTree ) +{ + Ivy_Obj_t * pResult, * pChild, * pNodes[16]; + int Var, i; + // get the node + Ivy_Dec_t Node = Ivy_IntToDec( Vec_IntEntry(vTree, iNode) ); + // compute the node function + if ( Node.Type == IVY_DEC_CONST1 ) + return Ivy_NotCond( Ivy_ManConst1(p), Node.fCompl ); + if ( Node.Type == IVY_DEC_PI ) + { + pResult = Ivy_ManObj( p, Vec_IntEntry(vFront, iNode) ); + return Ivy_NotCond( pResult, Node.fCompl ); + } + if ( Node.Type == IVY_DEC_BUF ) + { + pResult = Ivy_ManDsdConstruct_rec( p, vFront, Node.Fan0 >> 1, vTree ); + return Ivy_NotCond( pResult, Node.fCompl ); + } + if ( Node.Type == IVY_DEC_AND || Node.Type == IVY_DEC_EXOR ) + { + for ( i = 0; i < (int)Node.nFans; i++ ) + { + Var = Ivy_DecGetVar( &Node, i ); + assert( Node.Type == IVY_DEC_AND || (Var & 1) == 0 ); + pChild = Ivy_ManDsdConstruct_rec( p, vFront, Var >> 1, vTree ); + pChild = Ivy_NotCond( pChild, (Var & 1) ); + pNodes[i] = pChild; + } + +// Ivy_MultiEval( pNodes, Node.nFans, Node.Type == IVY_DEC_AND ? IVY_AND : IVY_EXOR ); + + pResult = Ivy_Multi( p, pNodes, Node.nFans, Node.Type == IVY_DEC_AND ? IVY_AND : IVY_EXOR ); + return Ivy_NotCond( pResult, Node.fCompl ); + } + assert( Node.fCompl == 0 ); + if ( Node.Type == IVY_DEC_MUX || Node.Type == IVY_DEC_MAJ ) + { + int VarC, Var1, Var0; + VarC = Ivy_DecGetVar( &Node, 0 ); + Var1 = Ivy_DecGetVar( &Node, 1 ); + Var0 = Ivy_DecGetVar( &Node, 2 ); + pNodes[0] = Ivy_ManDsdConstruct_rec( p, vFront, VarC >> 1, vTree ); + pNodes[1] = Ivy_ManDsdConstruct_rec( p, vFront, Var1 >> 1, vTree ); + pNodes[2] = Ivy_ManDsdConstruct_rec( p, vFront, Var0 >> 1, vTree ); + assert( Node.Type == IVY_DEC_MAJ || (VarC & 1) == 0 ); + pNodes[0] = Ivy_NotCond( pNodes[0], (VarC & 1) ); + pNodes[1] = Ivy_NotCond( pNodes[1], (Var1 & 1) ); + pNodes[2] = Ivy_NotCond( pNodes[2], (Var0 & 1) ); + if ( Node.Type == IVY_DEC_MUX ) + return Ivy_Mux( p, pNodes[0], pNodes[1], pNodes[2] ); + else + return Ivy_Maj( p, pNodes[0], pNodes[1], pNodes[2] ); + } + assert( 0 ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Implement DSD in the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ManDsdConstruct( Ivy_Man_t * p, Vec_Int_t * vFront, Vec_Int_t * vTree ) +{ + int Entry, i; + // implement latches on the frontier (TEMPORARY!!!) + Vec_IntForEachEntry( vFront, Entry, i ) + Vec_IntWriteEntry( vFront, i, Ivy_LeafId(Entry) ); + // recursively construct the tree + return Ivy_ManDsdConstruct_rec( p, vFront, Vec_IntSize(vTree)-1, vTree ); +} + + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthDsdComputePrint( unsigned uTruth ) +{ + static Vec_Int_t * vTree = NULL; + if ( vTree == NULL ) + vTree = Vec_IntAlloc( 12 ); + if ( Ivy_TruthDsd( uTruth, vTree ) ) + Ivy_TruthDsdPrint( stdout, vTree ); + else + printf( "Undecomposable\n" ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthTestOne( unsigned uTruth ) +{ + static int Counter = 0; + static Vec_Int_t * vTree = NULL; + // decompose + if ( vTree == NULL ) + vTree = Vec_IntAlloc( 12 ); + + if ( !Ivy_TruthDsd( uTruth, vTree ) ) + { +// printf( "Undecomposable\n" ); + } + else + { +// nTruthDsd++; + printf( "%5d : ", Counter++ ); + Extra_PrintBinary( stdout, &uTruth, 32 ); + printf( " " ); + Ivy_TruthDsdPrint( stdout, vTree ); + if ( uTruth != Ivy_TruthDsdCompute(vTree) ) + printf( "Verification failed.\n" ); + } +// Vec_IntFree( vTree ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthTest() +{ + FILE * pFile; + char Buffer[100]; + unsigned uTruth; + int i; + + pFile = fopen( "npn4.txt", "r" ); + for ( i = 0; i < 222; i++ ) +// pFile = fopen( "npn5.txt", "r" ); +// for ( i = 0; i < 616126; i++ ) + { + fscanf( pFile, "%s", Buffer ); + Extra_ReadHexadecimal( &uTruth, Buffer+2, 4 ); +// Extra_ReadHexadecimal( &uTruth, Buffer+2, 5 ); + uTruth |= (uTruth << 16); +// uTruth = ~uTruth; + Ivy_TruthTestOne( uTruth ); + } + fclose( pFile ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthTest3() +{ + FILE * pFile; + char Buffer[100]; + unsigned uTruth; + int i; + + pFile = fopen( "npn3.txt", "r" ); + for ( i = 0; i < 14; i++ ) + { + fscanf( pFile, "%s", Buffer ); + Extra_ReadHexadecimal( &uTruth, Buffer+2, 3 ); + uTruth = uTruth | (uTruth << 8) | (uTruth << 16) | (uTruth << 24); + Ivy_TruthTestOne( uTruth ); + } + fclose( pFile ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TruthTest5() +{ + FILE * pFile; + char Buffer[100]; + unsigned uTruth; + int i; + +// pFile = fopen( "npn4.txt", "r" ); +// for ( i = 0; i < 222; i++ ) + pFile = fopen( "npn5.txt", "r" ); + for ( i = 0; i < 616126; i++ ) + { + fscanf( pFile, "%s", Buffer ); +// Extra_ReadHexadecimal( &uTruth, Buffer+2, 4 ); + Extra_ReadHexadecimal( &uTruth, Buffer+2, 5 ); +// uTruth |= (uTruth << 16); +// uTruth = ~uTruth; + Ivy_TruthTestOne( uTruth ); + } + fclose( pFile ); +} + + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyFanout.c b/src/aig/ivy/ivyFanout.c new file mode 100644 index 00000000..3930186a --- /dev/null +++ b/src/aig/ivy/ivyFanout.c @@ -0,0 +1,309 @@ +/**CFile**************************************************************** + + FileName [ivyFanout.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Representation of the fanouts.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyFanout.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// getting hold of the next fanout of the node +static inline Ivy_Obj_t * Ivy_ObjNextFanout( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_IsComplement(pFanout) ); + if ( pFanout == NULL ) + return NULL; + if ( Ivy_ObjFanin0(pFanout) == pObj ) + return pFanout->pNextFan0; + assert( Ivy_ObjFanin1(pFanout) == pObj ); + return pFanout->pNextFan1; +} + +// getting hold of the previous fanout of the node +static inline Ivy_Obj_t * Ivy_ObjPrevFanout( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_IsComplement(pFanout) ); + if ( pFanout == NULL ) + return NULL; + if ( Ivy_ObjFanin0(pFanout) == pObj ) + return pFanout->pPrevFan0; + assert( Ivy_ObjFanin1(pFanout) == pObj ); + return pFanout->pPrevFan1; +} + +// getting hold of the place where the next fanout will be attached +static inline Ivy_Obj_t ** Ivy_ObjNextFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_IsComplement(pFanout) ); + if ( Ivy_ObjFanin0(pFanout) == pObj ) + return &pFanout->pNextFan0; + assert( Ivy_ObjFanin1(pFanout) == pObj ); + return &pFanout->pNextFan1; +} + +// getting hold of the place where the next fanout will be attached +static inline Ivy_Obj_t ** Ivy_ObjPrevFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_IsComplement(pFanout) ); + if ( Ivy_ObjFanin0(pFanout) == pObj ) + return &pFanout->pPrevFan0; + assert( Ivy_ObjFanin1(pFanout) == pObj ); + return &pFanout->pPrevFan1; +} + +// getting hold of the place where the next fanout will be attached +static inline Ivy_Obj_t ** Ivy_ObjPrevNextFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + Ivy_Obj_t * pTemp; + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_IsComplement(pFanout) ); + pTemp = Ivy_ObjPrevFanout(pObj, pFanout); + if ( pTemp == NULL ) + return &pObj->pFanout; + if ( Ivy_ObjFanin0(pTemp) == pObj ) + return &pTemp->pNextFan0; + assert( Ivy_ObjFanin1(pTemp) == pObj ); + return &pTemp->pNextFan1; +} + +// getting hold of the place where the next fanout will be attached +static inline Ivy_Obj_t ** Ivy_ObjNextPrevFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout ) +{ + Ivy_Obj_t * pTemp; + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_IsComplement(pFanout) ); + pTemp = Ivy_ObjNextFanout(pObj, pFanout); + if ( pTemp == NULL ) + return NULL; + if ( Ivy_ObjFanin0(pTemp) == pObj ) + return &pTemp->pPrevFan0; + assert( Ivy_ObjFanin1(pTemp) == pObj ); + return &pTemp->pPrevFan1; +} + +// iterator through the fanouts of the node +#define Ivy_ObjForEachFanoutInt( pObj, pFanout ) \ + for ( pFanout = (pObj)->pFanout; pFanout; \ + pFanout = Ivy_ObjNextFanout(pObj, pFanout) ) + +// safe iterator through the fanouts of the node +#define Ivy_ObjForEachFanoutIntSafe( pObj, pFanout, pFanout2 ) \ + for ( pFanout = (pObj)->pFanout, \ + pFanout2 = Ivy_ObjNextFanout(pObj, pFanout); \ + pFanout; \ + pFanout = pFanout2, \ + pFanout2 = Ivy_ObjNextFanout(pObj, pFanout) ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the fanout representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManStartFanout( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + assert( !p->fFanout ); + p->fFanout = 1; + Ivy_ManForEachObj( p, pObj, i ) + { + if ( Ivy_ObjFanin0(pObj) ) + Ivy_ObjAddFanout( p, Ivy_ObjFanin0(pObj), pObj ); + if ( Ivy_ObjFanin1(pObj) ) + Ivy_ObjAddFanout( p, Ivy_ObjFanin1(pObj), pObj ); + } +} + +/**Function************************************************************* + + Synopsis [Stops the fanout representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManStopFanout( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + assert( p->fFanout ); + p->fFanout = 0; + Ivy_ManForEachObj( p, pObj, i ) + pObj->pFanout = pObj->pNextFan0 = pObj->pNextFan1 = pObj->pPrevFan0 = pObj->pPrevFan1 = NULL; +} + +/**Function************************************************************* + + Synopsis [Add the fanout.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjAddFanout( Ivy_Man_t * p, Ivy_Obj_t * pFanin, Ivy_Obj_t * pFanout ) +{ + assert( p->fFanout ); + if ( pFanin->pFanout ) + { + *Ivy_ObjNextFanoutPlace(pFanin, pFanout) = pFanin->pFanout; + *Ivy_ObjPrevFanoutPlace(pFanin, pFanin->pFanout) = pFanout; + } + pFanin->pFanout = pFanout; +} + +/**Function************************************************************* + + Synopsis [Removes the fanout.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjDeleteFanout( Ivy_Man_t * p, Ivy_Obj_t * pFanin, Ivy_Obj_t * pFanout ) +{ + Ivy_Obj_t ** ppPlace1, ** ppPlace2, ** ppPlaceN; + assert( pFanin->pFanout != NULL ); + + ppPlace1 = Ivy_ObjNextFanoutPlace(pFanin, pFanout); + ppPlaceN = Ivy_ObjPrevNextFanoutPlace(pFanin, pFanout); + assert( *ppPlaceN == pFanout ); + if ( ppPlaceN ) + *ppPlaceN = *ppPlace1; + + ppPlace2 = Ivy_ObjPrevFanoutPlace(pFanin, pFanout); + ppPlaceN = Ivy_ObjNextPrevFanoutPlace(pFanin, pFanout); + assert( ppPlaceN == NULL || *ppPlaceN == pFanout ); + if ( ppPlaceN ) + *ppPlaceN = *ppPlace2; + + *ppPlace1 = NULL; + *ppPlace2 = NULL; +} + +/**Function************************************************************* + + Synopsis [Replaces the fanout of pOld to be pFanoutNew.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjPatchFanout( Ivy_Man_t * p, Ivy_Obj_t * pFanin, Ivy_Obj_t * pFanoutOld, Ivy_Obj_t * pFanoutNew ) +{ + Ivy_Obj_t ** ppPlace; + ppPlace = Ivy_ObjPrevNextFanoutPlace(pFanin, pFanoutOld); + assert( *ppPlace == pFanoutOld ); + if ( ppPlace ) + *ppPlace = pFanoutNew; + ppPlace = Ivy_ObjNextPrevFanoutPlace(pFanin, pFanoutOld); + assert( ppPlace == NULL || *ppPlace == pFanoutOld ); + if ( ppPlace ) + *ppPlace = pFanoutNew; + // assuming that pFanoutNew already points to the next fanout +} + +/**Function************************************************************* + + Synopsis [Starts iteration through the fanouts.] + + Description [Copies the currently available fanouts into the array.] + + SideEffects [Can be used while the fanouts are being removed.] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjCollectFanouts( Ivy_Man_t * p, Ivy_Obj_t * pObj, Vec_Ptr_t * vArray ) +{ + Ivy_Obj_t * pFanout; + assert( p->fFanout ); + assert( !Ivy_IsComplement(pObj) ); + Vec_PtrClear( vArray ); + Ivy_ObjForEachFanoutInt( pObj, pFanout ) + Vec_PtrPush( vArray, pFanout ); +} + +/**Function************************************************************* + + Synopsis [Reads one fanout.] + + Description [Returns fanout if there is only one fanout.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ObjReadFirstFanout( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + return pObj->pFanout; +} + +/**Function************************************************************* + + Synopsis [Reads one fanout.] + + Description [Returns fanout if there is only one fanout.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ObjFanoutNum( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pFanout; + int Counter = 0; + Ivy_ObjForEachFanoutInt( pObj, pFanout ) + Counter++; + return Counter; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyFastMap.c b/src/aig/ivy/ivyFastMap.c new file mode 100644 index 00000000..c4a043f2 --- /dev/null +++ b/src/aig/ivy/ivyFastMap.c @@ -0,0 +1,1593 @@ +/**CFile**************************************************************** + + FileName [ivyFastMap.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Fast FPGA mapping.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyFastMap.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +#define IVY_INFINITY 10000 + +typedef struct Ivy_SuppMan_t_ Ivy_SuppMan_t; +struct Ivy_SuppMan_t_ +{ + int nLimit; // the limit on the number of inputs + int nObjs; // the number of entries + int nSize; // size of each entry in bytes + char * pMem; // memory allocated + Vec_Vec_t * vLuts; // the array of nodes used in the mapping +}; + +typedef struct Ivy_Supp_t_ Ivy_Supp_t; +struct Ivy_Supp_t_ +{ + char nSize; // the number of support nodes + char fMark; // multipurpose mask + char fMark2; // multipurpose mask + char fMark3; // multipurpose mask + int nRefs; // the number of references + short Delay; // the delay of the node + short DelayR; // the reverse delay of the node + int pArray[0]; // the support nodes +}; + +static inline Ivy_Supp_t * Ivy_ObjSupp( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + return (Ivy_Supp_t *)(((Ivy_SuppMan_t*)pAig->pData)->pMem + pObj->Id * ((Ivy_SuppMan_t*)pAig->pData)->nSize); +} +static inline Ivy_Supp_t * Ivy_ObjSuppStart( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSupp; + pSupp = Ivy_ObjSupp( pAig, pObj ); + pSupp->fMark = 0; + pSupp->Delay = 0; + pSupp->nSize = 1; + pSupp->pArray[0] = pObj->Id; + return pSupp; +} + +static void Ivy_FastMapPrint( Ivy_Man_t * pAig, int Delay, int Area, int Time, char * pStr ); +static int Ivy_FastMapDelay( Ivy_Man_t * pAig ); +static int Ivy_FastMapArea( Ivy_Man_t * pAig ); +static void Ivy_FastMapNode( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit ); +static void Ivy_FastMapNodeArea( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit ); +static int Ivy_FastMapMerge( Ivy_Supp_t * pSupp0, Ivy_Supp_t * pSupp1, Ivy_Supp_t * pSupp, int nLimit ); +static void Ivy_FastMapRequired( Ivy_Man_t * pAig, int Delay, int fSetInter ); +static void Ivy_FastMapRecover( Ivy_Man_t * pAig, int nLimit ); +static int Ivy_FastMapNodeDelay( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ); +static int Ivy_FastMapNodeAreaRefed( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ); +static int Ivy_FastMapNodeAreaDerefed( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ); +static void Ivy_FastMapNodeRecover( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront, Vec_Ptr_t * vFrontOld ); +static int Ivy_FastMapNodeRef( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ); +static int Ivy_FastMapNodeDeref( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ); + + +extern int s_MappingTime; +extern int s_MappingMem; + + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs fast K-LUT mapping of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapPerform( Ivy_Man_t * pAig, int nLimit, int fRecovery, int fVerbose ) +{ + Ivy_SuppMan_t * pMan; + Ivy_Obj_t * pObj; + int i, Delay, Area, clk, clkTotal = clock(); + // start the memory for supports + pMan = ALLOC( Ivy_SuppMan_t, 1 ); + memset( pMan, 0, sizeof(Ivy_SuppMan_t) ); + pMan->nLimit = nLimit; + pMan->nObjs = Ivy_ManObjIdMax(pAig) + 1; + pMan->nSize = sizeof(Ivy_Supp_t) + nLimit * sizeof(int); + pMan->pMem = (char *)malloc( pMan->nObjs * pMan->nSize ); + memset( pMan->pMem, 0, pMan->nObjs * pMan->nSize ); + pMan->vLuts = Vec_VecAlloc( 100 ); + pAig->pData = pMan; +clk = clock(); + // set the PI mapping + Ivy_ObjSuppStart( pAig, Ivy_ManConst1(pAig) ); + Ivy_ManForEachPi( pAig, pObj, i ) + Ivy_ObjSuppStart( pAig, pObj ); + // iterate through all nodes in the topological order + Ivy_ManForEachNode( pAig, pObj, i ) + Ivy_FastMapNode( pAig, pObj, nLimit ); + // find the best arrival time and area + Delay = Ivy_FastMapDelay( pAig ); + Area = Ivy_FastMapArea(pAig); + if ( fVerbose ) + Ivy_FastMapPrint( pAig, Delay, Area, clock() - clk, "Delay oriented mapping: " ); + +// 2-1-2 (doing 2-1-2-1-2 improves 0.5%) + + if ( fRecovery ) + { +clk = clock(); + Ivy_FastMapRequired( pAig, Delay, 0 ); + // remap the nodes + Ivy_FastMapRecover( pAig, nLimit ); + Delay = Ivy_FastMapDelay( pAig ); + Area = Ivy_FastMapArea(pAig); + if ( fVerbose ) + Ivy_FastMapPrint( pAig, Delay, Area, clock() - clk, "Area recovery 2 : " ); + +clk = clock(); + Ivy_FastMapRequired( pAig, Delay, 0 ); + // iterate through all nodes in the topological order + Ivy_ManForEachNode( pAig, pObj, i ) + Ivy_FastMapNodeArea( pAig, pObj, nLimit ); + Delay = Ivy_FastMapDelay( pAig ); + Area = Ivy_FastMapArea(pAig); + if ( fVerbose ) + Ivy_FastMapPrint( pAig, Delay, Area, clock() - clk, "Area recovery 1 : " ); + +clk = clock(); + Ivy_FastMapRequired( pAig, Delay, 0 ); + // remap the nodes + Ivy_FastMapRecover( pAig, nLimit ); + Delay = Ivy_FastMapDelay( pAig ); + Area = Ivy_FastMapArea(pAig); + if ( fVerbose ) + Ivy_FastMapPrint( pAig, Delay, Area, clock() - clk, "Area recovery 2 : " ); + } + + + s_MappingTime = clock() - clkTotal; + s_MappingMem = pMan->nObjs * pMan->nSize; +/* + { + Vec_Ptr_t * vNodes; + vNodes = Vec_PtrAlloc( 100 ); + Vec_VecForEachEntry( pMan->vLuts, pObj, i, k ) + Vec_PtrPush( vNodes, pObj ); + Ivy_ManShow( pAig, 0, vNodes ); + Vec_PtrFree( vNodes ); + } +*/ +} + +/**Function************************************************************* + + Synopsis [Cleans memory used for decomposition.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapStop( Ivy_Man_t * pAig ) +{ + Ivy_SuppMan_t * p = pAig->pData; + Vec_VecFree( p->vLuts ); + free( p->pMem ); + free( p ); + pAig->pData = NULL; +} + +/**Function************************************************************* + + Synopsis [Prints statistics.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapPrint( Ivy_Man_t * pAig, int Delay, int Area, int Time, char * pStr ) +{ + printf( "%s : Delay = %3d. Area = %6d. ", pStr, Delay, Area ); + PRT( "Time", Time ); +} + +/**Function************************************************************* + + Synopsis [Computes delay after LUT mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapDelay( Ivy_Man_t * pAig ) +{ + Ivy_Supp_t * pSupp; + Ivy_Obj_t * pObj; + int i, DelayMax = 0; + Ivy_ManForEachPo( pAig, pObj, i ) + { + pObj = Ivy_ObjFanin0(pObj); + if ( !Ivy_ObjIsNode(pObj) ) + continue; + pSupp = Ivy_ObjSupp( pAig, pObj ); + if ( DelayMax < pSupp->Delay ) + DelayMax = pSupp->Delay; + } + return DelayMax; +} + +/**Function************************************************************* + + Synopsis [Computes area after mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapArea_rec( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, Vec_Vec_t * vLuts ) +{ + Ivy_Supp_t * pSupp; + int i, Counter; + pSupp = Ivy_ObjSupp( pAig, pObj ); + // skip visited nodes and PIs + if ( pSupp->fMark || pSupp->nSize == 1 ) + return 0; + pSupp->fMark = 1; + // compute the area of this node + Counter = 0; + for ( i = 0; i < pSupp->nSize; i++ ) + Counter += Ivy_FastMapArea_rec( pAig, Ivy_ManObj(pAig, pSupp->pArray[i]), vLuts ); + // add the node to the array of LUTs + Vec_VecPush( vLuts, pSupp->Delay, pObj ); + return 1 + Counter; +} + +/**Function************************************************************* + + Synopsis [Computes area after mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapArea( Ivy_Man_t * pAig ) +{ + Vec_Vec_t * vLuts; + Ivy_Obj_t * pObj; + int i, Counter = 0; + // get the array to store the nodes + vLuts = ((Ivy_SuppMan_t *)pAig->pData)->vLuts; + Vec_VecClear( vLuts ); + // explore starting from each node + Ivy_ManForEachPo( pAig, pObj, i ) + Counter += Ivy_FastMapArea_rec( pAig, Ivy_ObjFanin0(pObj), vLuts ); + // clean the marks + Ivy_ManForEachNode( pAig, pObj, i ) + Ivy_ObjSupp( pAig, pObj )->fMark = 0; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Ivy_ObjIsNodeInt1( Ivy_Obj_t * pObj ) +{ + return Ivy_ObjIsNode(pObj) && Ivy_ObjRefs(pObj) == 1; +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Ivy_ObjIsNodeInt2( Ivy_Obj_t * pObj ) +{ + return Ivy_ObjIsNode(pObj) && Ivy_ObjRefs(pObj) <= 2; +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Vec_IntSelectSort( int * pArray, int nSize ) +{ + int temp, i, j, best_i; + for ( i = 0; i < nSize-1; i++ ) + { + best_i = i; + for ( j = i+1; j < nSize; j++ ) + if ( pArray[j] < pArray[best_i] ) + best_i = j; + temp = pArray[i]; + pArray[i] = pArray[best_i]; + pArray[best_i] = temp; + } +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Vec_IntRemoveDup( int * pArray, int nSize ) +{ + int i, k; + if ( nSize < 2 ) + return nSize; + for ( i = k = 1; i < nSize; i++ ) + if ( pArray[i] != pArray[i-1] ) + pArray[k++] = pArray[i]; + return k; +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeArea2( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit ) +{ + static int Store[32], StoreSize; + static char Supp0[16], Supp1[16]; + static Ivy_Supp_t * pTemp0 = (Ivy_Supp_t *)Supp0; + static Ivy_Supp_t * pTemp1 = (Ivy_Supp_t *)Supp1; + Ivy_Obj_t * pFanin0, * pFanin1; + Ivy_Supp_t * pSupp0, * pSupp1, * pSupp; + int RetValue, DelayOld; + assert( nLimit <= 32 ); + assert( Ivy_ObjIsNode(pObj) ); + // get the fanins + pFanin0 = Ivy_ObjFanin0(pObj); + pFanin1 = Ivy_ObjFanin1(pObj); + // get the supports + pSupp0 = Ivy_ObjSupp( pAig, pFanin0 ); + pSupp1 = Ivy_ObjSupp( pAig, pFanin1 ); + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->fMark == 0 ); + // get the old delay of the node + DelayOld = Ivy_FastMapNodeDelay(pAig, pObj); + assert( DelayOld <= pSupp->DelayR ); + // copy the current cut + memcpy( Store, pSupp->pArray, sizeof(int) * pSupp->nSize ); + StoreSize = pSupp->nSize; + // get the fanin support + if ( Ivy_ObjRefs(pFanin0) > 1 && pSupp0->Delay < pSupp->DelayR ) + { + pSupp0 = pTemp0; + pSupp0->nSize = 1; + pSupp0->pArray[0] = Ivy_ObjFaninId0(pObj); + } + // get the fanin support + if ( Ivy_ObjRefs(pFanin1) > 1 && pSupp1->Delay < pSupp->DelayR ) + { + pSupp1 = pTemp1; + pSupp1->nSize = 1; + pSupp1->pArray[0] = Ivy_ObjFaninId1(pObj); + } + // merge the cuts + if ( pSupp0->nSize < pSupp1->nSize ) + RetValue = Ivy_FastMapMerge( pSupp1, pSupp0, pSupp, nLimit ); + else + RetValue = Ivy_FastMapMerge( pSupp0, pSupp1, pSupp, nLimit ); + if ( !RetValue ) + { + pSupp->nSize = 2; + pSupp->pArray[0] = Ivy_ObjFaninId0(pObj); + pSupp->pArray[1] = Ivy_ObjFaninId1(pObj); + } + // check the resulting delay + pSupp->Delay = Ivy_FastMapNodeDelay(pAig, pObj); + if ( pSupp->Delay > pSupp->DelayR ) + { + pSupp->nSize = StoreSize; + memcpy( pSupp->pArray, Store, sizeof(int) * pSupp->nSize ); + pSupp->Delay = DelayOld; + } +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeArea( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit ) +{ + static int Store[32], StoreSize; + static char Supp0[16], Supp1[16]; + static Ivy_Supp_t * pTemp0 = (Ivy_Supp_t *)Supp0; + static Ivy_Supp_t * pTemp1 = (Ivy_Supp_t *)Supp1; + Ivy_Obj_t * pFanin0, * pFanin1; + Ivy_Supp_t * pSupp0, * pSupp1, * pSupp; + int RetValue, DelayOld, RefsOld; + int AreaBef, AreaAft; + assert( nLimit <= 32 ); + assert( Ivy_ObjIsNode(pObj) ); + // get the fanins + pFanin0 = Ivy_ObjFanin0(pObj); + pFanin1 = Ivy_ObjFanin1(pObj); + // get the supports + pSupp0 = Ivy_ObjSupp( pAig, pFanin0 ); + pSupp1 = Ivy_ObjSupp( pAig, pFanin1 ); + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->fMark == 0 ); + + // get the area + if ( pSupp->nRefs == 0 ) + AreaBef = Ivy_FastMapNodeAreaDerefed( pAig, pObj ); + else + AreaBef = Ivy_FastMapNodeAreaRefed( pAig, pObj ); +// if ( AreaBef == 1 ) +// return; + + // deref the cut if the node is refed + if ( pSupp->nRefs != 0 ) + Ivy_FastMapNodeDeref( pAig, pObj ); + + // get the old delay of the node + DelayOld = Ivy_FastMapNodeDelay(pAig, pObj); + assert( DelayOld <= pSupp->DelayR ); + // copy the current cut + memcpy( Store, pSupp->pArray, sizeof(int) * pSupp->nSize ); + StoreSize = pSupp->nSize; + // get the fanin support + if ( Ivy_ObjRefs(pFanin0) > 2 && pSupp0->Delay < pSupp->DelayR ) +// if ( pSupp0->nRefs > 0 && pSupp0->Delay < pSupp->DelayR ) // this leads to 2% worse results + { + pSupp0 = pTemp0; + pSupp0->nSize = 1; + pSupp0->pArray[0] = Ivy_ObjFaninId0(pObj); + } + // get the fanin support + if ( Ivy_ObjRefs(pFanin1) > 2 && pSupp1->Delay < pSupp->DelayR ) +// if ( pSupp1->nRefs > 0 && pSupp1->Delay < pSupp->DelayR ) + { + pSupp1 = pTemp1; + pSupp1->nSize = 1; + pSupp1->pArray[0] = Ivy_ObjFaninId1(pObj); + } + // merge the cuts + if ( pSupp0->nSize < pSupp1->nSize ) + RetValue = Ivy_FastMapMerge( pSupp1, pSupp0, pSupp, nLimit ); + else + RetValue = Ivy_FastMapMerge( pSupp0, pSupp1, pSupp, nLimit ); + if ( !RetValue ) + { + pSupp->nSize = 2; + pSupp->pArray[0] = Ivy_ObjFaninId0(pObj); + pSupp->pArray[1] = Ivy_ObjFaninId1(pObj); + } + + // check the resulting delay + pSupp->Delay = Ivy_FastMapNodeDelay(pAig, pObj); + + RefsOld = pSupp->nRefs; pSupp->nRefs = 0; + AreaAft = Ivy_FastMapNodeAreaDerefed( pAig, pObj ); + pSupp->nRefs = RefsOld; + + if ( AreaAft > AreaBef || pSupp->Delay > pSupp->DelayR ) +// if ( pSupp->Delay > pSupp->DelayR ) + { + pSupp->nSize = StoreSize; + memcpy( pSupp->pArray, Store, sizeof(int) * pSupp->nSize ); + pSupp->Delay = DelayOld; +// printf( "-" ); + } +// else +// printf( "+" ); + + if ( pSupp->nRefs != 0 ) + Ivy_FastMapNodeRef( pAig, pObj ); +} + +/**Function************************************************************* + + Synopsis [Performs fast mapping for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNode( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit ) +{ + Ivy_Supp_t * pSupp0, * pSupp1, * pSupp; + int fFaninParam = 2; + int RetValue; + assert( Ivy_ObjIsNode(pObj) ); + // get the supports + pSupp0 = Ivy_ObjSupp( pAig, Ivy_ObjFanin0(pObj) ); + pSupp1 = Ivy_ObjSupp( pAig, Ivy_ObjFanin1(pObj) ); + pSupp = Ivy_ObjSupp( pAig, pObj ); + pSupp->fMark = 0; + // get the delays + if ( pSupp0->Delay == pSupp1->Delay ) + pSupp->Delay = (pSupp0->Delay == 0) ? pSupp0->Delay + 1: pSupp0->Delay; + else if ( pSupp0->Delay > pSupp1->Delay ) + { + pSupp->Delay = pSupp0->Delay; + pSupp1 = Ivy_ObjSupp( pAig, Ivy_ManConst1(pAig) ); + pSupp1->pArray[0] = Ivy_ObjFaninId1(pObj); + } + else // if ( pSupp0->Delay < pSupp1->Delay ) + { + pSupp->Delay = pSupp1->Delay; + pSupp0 = Ivy_ObjSupp( pAig, Ivy_ManConst1(pAig) ); + pSupp0->pArray[0] = Ivy_ObjFaninId0(pObj); + } + // merge the cuts + if ( pSupp0->nSize < pSupp1->nSize ) + RetValue = Ivy_FastMapMerge( pSupp1, pSupp0, pSupp, nLimit ); + else + RetValue = Ivy_FastMapMerge( pSupp0, pSupp1, pSupp, nLimit ); + if ( !RetValue ) + { + pSupp->Delay++; + if ( fFaninParam == 2 ) + { + pSupp->nSize = 2; + pSupp->pArray[0] = Ivy_ObjFaninId0(pObj); + pSupp->pArray[1] = Ivy_ObjFaninId1(pObj); + } + else if ( fFaninParam == 3 ) + { + Ivy_Obj_t * pFanin0, * pFanin1, * pFaninA, * pFaninB; + pFanin0 = Ivy_ObjFanin0(pObj); + pFanin1 = Ivy_ObjFanin1(pObj); + pSupp->nSize = 0; + // process the first fanin + if ( Ivy_ObjIsNodeInt1(pFanin0) ) + { + pFaninA = Ivy_ObjFanin0(pFanin0); + pFaninB = Ivy_ObjFanin1(pFanin0); + if ( Ivy_ObjIsNodeInt1(pFaninA) && Ivy_ObjIsNodeInt1(pFaninB) ) + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin0); + else + { + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninA); + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninB); + } + } + else + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin0); + // process the second fanin + if ( Ivy_ObjIsNodeInt1(pFanin1) ) + { + pFaninA = Ivy_ObjFanin0(pFanin1); + pFaninB = Ivy_ObjFanin1(pFanin1); + if ( Ivy_ObjIsNodeInt1(pFaninA) && Ivy_ObjIsNodeInt1(pFaninB) ) + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin1); + else + { + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninA); + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninB); + } + } + else + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin1); + // sort the fanins + Vec_IntSelectSort( pSupp->pArray, pSupp->nSize ); + pSupp->nSize = Vec_IntRemoveDup( pSupp->pArray, pSupp->nSize ); + assert( pSupp->pArray[0] < pSupp->pArray[1] ); + } + else if ( fFaninParam == 4 ) + { + Ivy_Obj_t * pFanin0, * pFanin1, * pFaninA, * pFaninB; + pFanin0 = Ivy_ObjFanin0(pObj); + pFanin1 = Ivy_ObjFanin1(pObj); + pSupp->nSize = 0; + // consider the case when exactly one of them is internal + if ( Ivy_ObjIsNodeInt1(pFanin0) ^ Ivy_ObjIsNodeInt1(pFanin1) ) + { + pSupp0 = Ivy_ObjSupp( pAig, Ivy_ObjFanin0(pObj) ); + pSupp1 = Ivy_ObjSupp( pAig, Ivy_ObjFanin1(pObj) ); + if ( Ivy_ObjIsNodeInt1(pFanin0) && pSupp0->nSize < nLimit ) + { + pSupp->Delay = IVY_MAX( pSupp0->Delay, pSupp1->Delay + 1 ); + pSupp1 = Ivy_ObjSupp( pAig, Ivy_ManConst1(pAig) ); + pSupp1->pArray[0] = Ivy_ObjId(pFanin1); + // merge the cuts + RetValue = Ivy_FastMapMerge( pSupp0, pSupp1, pSupp, nLimit ); + assert( RetValue ); + assert( pSupp->nSize > 1 ); + return; + } + if ( Ivy_ObjIsNodeInt1(pFanin1) && pSupp1->nSize < nLimit ) + { + pSupp->Delay = IVY_MAX( pSupp1->Delay, pSupp0->Delay + 1 ); + pSupp0 = Ivy_ObjSupp( pAig, Ivy_ManConst1(pAig) ); + pSupp0->pArray[0] = Ivy_ObjId(pFanin0); + // merge the cuts + RetValue = Ivy_FastMapMerge( pSupp1, pSupp0, pSupp, nLimit ); + assert( RetValue ); + assert( pSupp->nSize > 1 ); + return; + } + } + // process the first fanin + if ( Ivy_ObjIsNodeInt1(pFanin0) ) + { + pFaninA = Ivy_ObjFanin0(pFanin0); + pFaninB = Ivy_ObjFanin1(pFanin0); + if ( Ivy_ObjIsNodeInt1(pFaninA) && Ivy_ObjIsNodeInt1(pFaninB) ) + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin0); + else + { + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninA); + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninB); + } + } + else + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin0); + // process the second fanin + if ( Ivy_ObjIsNodeInt1(pFanin1) ) + { + pFaninA = Ivy_ObjFanin0(pFanin1); + pFaninB = Ivy_ObjFanin1(pFanin1); + if ( Ivy_ObjIsNodeInt1(pFaninA) && Ivy_ObjIsNodeInt1(pFaninB) ) + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin1); + else + { + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninA); + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFaninB); + } + } + else + pSupp->pArray[pSupp->nSize++] = Ivy_ObjId(pFanin1); + // sort the fanins + Vec_IntSelectSort( pSupp->pArray, pSupp->nSize ); + pSupp->nSize = Vec_IntRemoveDup( pSupp->pArray, pSupp->nSize ); + assert( pSupp->pArray[0] < pSupp->pArray[1] ); + assert( pSupp->nSize > 1 ); + } + } + assert( pSupp->Delay > 0 ); +} + +/**Function************************************************************* + + Synopsis [Merges two supports] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapMerge( Ivy_Supp_t * pSupp0, Ivy_Supp_t * pSupp1, Ivy_Supp_t * pSupp, int nLimit ) +{ + int i, k, c; + assert( pSupp0->nSize >= pSupp1->nSize ); + // the case of the largest cut sizes + if ( pSupp0->nSize == nLimit && pSupp1->nSize == nLimit ) + { + for ( i = 0; i < pSupp0->nSize; i++ ) + if ( pSupp0->pArray[i] != pSupp1->pArray[i] ) + return 0; + for ( i = 0; i < pSupp0->nSize; i++ ) + pSupp->pArray[i] = pSupp0->pArray[i]; + pSupp->nSize = pSupp0->nSize; + return 1; + } + // the case when one of the cuts is the largest + if ( pSupp0->nSize == nLimit ) + { + for ( i = 0; i < pSupp1->nSize; i++ ) + { + for ( k = pSupp0->nSize - 1; k >= 0; k-- ) + if ( pSupp0->pArray[k] == pSupp1->pArray[i] ) + break; + if ( k == -1 ) // did not find + return 0; + } + for ( i = 0; i < pSupp0->nSize; i++ ) + pSupp->pArray[i] = pSupp0->pArray[i]; + pSupp->nSize = pSupp0->nSize; + return 1; + } + + // compare two cuts with different numbers + i = k = 0; + for ( c = 0; c < nLimit; c++ ) + { + if ( k == pSupp1->nSize ) + { + if ( i == pSupp0->nSize ) + { + pSupp->nSize = c; + return 1; + } + pSupp->pArray[c] = pSupp0->pArray[i++]; + continue; + } + if ( i == pSupp0->nSize ) + { + if ( k == pSupp1->nSize ) + { + pSupp->nSize = c; + return 1; + } + pSupp->pArray[c] = pSupp1->pArray[k++]; + continue; + } + if ( pSupp0->pArray[i] < pSupp1->pArray[k] ) + { + pSupp->pArray[c] = pSupp0->pArray[i++]; + continue; + } + if ( pSupp0->pArray[i] > pSupp1->pArray[k] ) + { + pSupp->pArray[c] = pSupp1->pArray[k++]; + continue; + } + pSupp->pArray[c] = pSupp0->pArray[i++]; + k++; + } + if ( i < pSupp0->nSize || k < pSupp1->nSize ) + return 0; + pSupp->nSize = c; + return 1; +} + +/**Function************************************************************* + + Synopsis [Creates integer vector with the support of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapReadSupp( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, Vec_Int_t * vLeaves ) +{ + Ivy_Supp_t * pSupp; + pSupp = Ivy_ObjSupp( pAig, pObj ); + vLeaves->nCap = 8; + vLeaves->nSize = pSupp->nSize; + vLeaves->pArray = pSupp->pArray; +} + +/**Function************************************************************* + + Synopsis [Sets the required times of the intermediate nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapRequired_rec( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, Ivy_Obj_t * pRoot, int DelayR ) +{ + Ivy_Supp_t * pSupp; + pSupp = Ivy_ObjSupp( pAig, pObj ); + if ( pObj != pRoot && (pSupp->nRefs > 0 || Ivy_ObjIsCi(pObj)) ) + return; + Ivy_FastMapRequired_rec( pAig, Ivy_ObjFanin0(pObj), pRoot, DelayR ); + Ivy_FastMapRequired_rec( pAig, Ivy_ObjFanin1(pObj), pRoot, DelayR ); +// assert( pObj == pRoot || pSupp->DelayR == IVY_INFINITY ); + pSupp->DelayR = DelayR; +} + +/**Function************************************************************* + + Synopsis [Computes the required times for each node.] + + Description [Sets reference counters for each node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapRequired( Ivy_Man_t * pAig, int Delay, int fSetInter ) +{ + Vec_Vec_t * vLuts; + Vec_Ptr_t * vNodes; + Ivy_Obj_t * pObj; + Ivy_Supp_t * pSupp, * pSuppF; + int i, k, c; + // clean the required times + Ivy_ManForEachPi( pAig, pObj, i ) + { + pSupp = Ivy_ObjSupp( pAig, pObj ); + pSupp->DelayR = IVY_INFINITY; + pSupp->nRefs = 0; + } + Ivy_ManForEachNode( pAig, pObj, i ) + { + pSupp = Ivy_ObjSupp( pAig, pObj ); + pSupp->DelayR = IVY_INFINITY; + pSupp->nRefs = 0; + } + // set the required times of the POs + Ivy_ManForEachPo( pAig, pObj, i ) + { + pSupp = Ivy_ObjSupp( pAig, Ivy_ObjFanin0(pObj) ); + pSupp->DelayR = Delay; + pSupp->nRefs++; + } + // get the levelized nodes used in the mapping + vLuts = ((Ivy_SuppMan_t *)pAig->pData)->vLuts; + // propagate the required times + Vec_VecForEachLevelReverse( vLuts, vNodes, i ) + Vec_PtrForEachEntry( vNodes, pObj, k ) + { + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->nRefs > 0 ); + for ( c = 0; c < pSupp->nSize; c++ ) + { + pSuppF = Ivy_ObjSupp( pAig, Ivy_ManObj(pAig, pSupp->pArray[c]) ); + pSuppF->DelayR = IVY_MIN( pSuppF->DelayR, pSupp->DelayR - 1 ); + pSuppF->nRefs++; + } + } +/* + // print out some of the required times + Ivy_ManForEachPi( pAig, pObj, i ) + { + pSupp = Ivy_ObjSupp( pAig, pObj ); + printf( "%d ", pSupp->DelayR ); + } + printf( "\n" ); +*/ + + if ( fSetInter ) + { + // set the required times of the intermediate nodes + Vec_VecForEachLevelReverse( vLuts, vNodes, i ) + Vec_PtrForEachEntry( vNodes, pObj, k ) + { + pSupp = Ivy_ObjSupp( pAig, pObj ); + Ivy_FastMapRequired_rec( pAig, pObj, pObj, pSupp->DelayR ); + } + // make sure that all required times are assigned + Ivy_ManForEachNode( pAig, pObj, i ) + { + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->DelayR < IVY_INFINITY ); + } + } +} + +/**Function************************************************************* + + Synopsis [Performs area recovery for each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapRecover( Ivy_Man_t * pAig, int nLimit ) +{ + Vec_Ptr_t * vFront, * vFrontOld; + Ivy_Obj_t * pObj; + int i; + vFront = Vec_PtrAlloc( nLimit ); + vFrontOld = Vec_PtrAlloc( nLimit ); + Ivy_ManCleanTravId( pAig ); + // iterate through all nodes in the topological order + Ivy_ManForEachNode( pAig, pObj, i ) + Ivy_FastMapNodeRecover( pAig, pObj, nLimit, vFront, vFrontOld ); + Vec_PtrFree( vFrontOld ); + Vec_PtrFree( vFront ); +} + +/**Function************************************************************* + + Synopsis [Computes the delay of the cut rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeDelay( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSupp, * pSuppF; + int c, Delay = 0; + pSupp = Ivy_ObjSupp( pAig, pObj ); + for ( c = 0; c < pSupp->nSize; c++ ) + { + pSuppF = Ivy_ObjSupp( pAig, Ivy_ManObj(pAig, pSupp->pArray[c]) ); + Delay = IVY_MAX( Delay, pSuppF->Delay ); + } + return 1 + Delay; +} + + +/**function************************************************************* + + synopsis [References the cut.] + + description [This procedure is similar to the procedure NodeReclaim.] + + sideeffects [] + + seealso [] + +***********************************************************************/ +int Ivy_FastMapNodeRef( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSupp, * pSuppF; + Ivy_Obj_t * pNodeChild; + int aArea, i; + // start the area of this cut + aArea = 1; + // go through the children + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->nSize > 1 ); + for ( i = 0; i < pSupp->nSize; i++ ) + { + pNodeChild = Ivy_ManObj(pAig, pSupp->pArray[i]); + pSuppF = Ivy_ObjSupp( pAig, pNodeChild ); + assert( pSuppF->nRefs >= 0 ); + if ( pSuppF->nRefs++ > 0 ) + continue; + if ( pSuppF->nSize == 1 ) + continue; + aArea += Ivy_FastMapNodeRef( pAig, pNodeChild ); + } + return aArea; +} + +/**function************************************************************* + + synopsis [Dereferences the cut.] + + description [This procedure is similar to the procedure NodeRecusiveDeref.] + + sideeffects [] + + seealso [] + +***********************************************************************/ +int Ivy_FastMapNodeDeref( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSupp, * pSuppF; + Ivy_Obj_t * pNodeChild; + int aArea, i; + // start the area of this cut + aArea = 1; + // go through the children + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->nSize > 1 ); + for ( i = 0; i < pSupp->nSize; i++ ) + { + pNodeChild = Ivy_ManObj(pAig, pSupp->pArray[i]); + pSuppF = Ivy_ObjSupp( pAig, pNodeChild ); + assert( pSuppF->nRefs > 0 ); + if ( --pSuppF->nRefs > 0 ) + continue; + if ( pSuppF->nSize == 1 ) + continue; + aArea += Ivy_FastMapNodeDeref( pAig, pNodeChild ); + } + return aArea; +} + +/**function************************************************************* + + synopsis [Computes the exact area associated with the cut.] + + description [] + + sideeffects [] + + seealso [] + +***********************************************************************/ +int Ivy_FastMapNodeAreaRefed( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSupp; + int aResult, aResult2; + if ( Ivy_ObjIsCi(pObj) ) + return 0; + assert( Ivy_ObjIsNode(pObj) ); + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->nRefs > 0 ); + aResult = Ivy_FastMapNodeDeref( pAig, pObj ); + aResult2 = Ivy_FastMapNodeRef( pAig, pObj ); + assert( aResult == aResult2 ); + return aResult; +} + +/**function************************************************************* + + synopsis [Computes the exact area associated with the cut.] + + description [] + + sideeffects [] + + seealso [] + +***********************************************************************/ +int Ivy_FastMapNodeAreaDerefed( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSupp; + int aResult, aResult2; + if ( Ivy_ObjIsCi(pObj) ) + return 0; + assert( Ivy_ObjIsNode(pObj) ); + pSupp = Ivy_ObjSupp( pAig, pObj ); + assert( pSupp->nRefs == 0 ); + aResult2 = Ivy_FastMapNodeRef( pAig, pObj ); + aResult = Ivy_FastMapNodeDeref( pAig, pObj ); + assert( aResult == aResult2 ); + return aResult; +} + + + + +/**Function************************************************************* + + Synopsis [Counts the number of nodes with no external fanout.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapCutCost( Ivy_Man_t * pAig, Vec_Ptr_t * vFront ) +{ + Ivy_Supp_t * pSuppF; + Ivy_Obj_t * pFanin; + int i, Counter = 0; + Vec_PtrForEachEntry( vFront, pFanin, i ) + { + pSuppF = Ivy_ObjSupp( pAig, pFanin ); + if ( pSuppF->nRefs == 0 ) + Counter++; + } + return Counter; +} + +/**Function************************************************************* + + Synopsis [Performs area recovery for each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapMark_rec( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + if ( Ivy_ObjIsTravIdCurrent(pAig, pObj) ) + return; + assert( Ivy_ObjIsNode(pObj) ); + Ivy_FastMapMark_rec( pAig, Ivy_ObjFanin0(pObj) ); + Ivy_FastMapMark_rec( pAig, Ivy_ObjFanin1(pObj) ); + Ivy_ObjSetTravIdCurrent(pAig, pObj); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the number of fanins will grow.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeWillGrow( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pFanin0, * pFanin1; + assert( Ivy_ObjIsNode(pObj) ); + pFanin0 = Ivy_ObjFanin0(pObj); + pFanin1 = Ivy_ObjFanin1(pObj); + return !Ivy_ObjIsTravIdCurrent(pAig, pFanin0) && !Ivy_ObjIsTravIdCurrent(pAig, pFanin1); +} + +/**Function************************************************************* + + Synopsis [Returns the increase in the number of fanins with no external refs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeFaninCost( Ivy_Man_t * pAig, Ivy_Obj_t * pObj ) +{ + Ivy_Supp_t * pSuppF; + Ivy_Obj_t * pFanin; + int Counter = 0; + assert( Ivy_ObjIsNode(pObj) ); + // check if the node has external refs + pSuppF = Ivy_ObjSupp( pAig, pObj ); + if ( pSuppF->nRefs == 0 ) + Counter--; + // increment the number of fanins without external refs + pFanin = Ivy_ObjFanin0(pObj); + pSuppF = Ivy_ObjSupp( pAig, pFanin ); + if ( !Ivy_ObjIsTravIdCurrent(pAig, pFanin) && pSuppF->nRefs == 0 ) + Counter++; + // increment the number of fanins without external refs + pFanin = Ivy_ObjFanin1(pObj); + pSuppF = Ivy_ObjSupp( pAig, pFanin ); + if ( !Ivy_ObjIsTravIdCurrent(pAig, pFanin) && pSuppF->nRefs == 0 ) + Counter++; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Updates the frontier.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeFaninUpdate( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, Vec_Ptr_t * vFront ) +{ + Ivy_Obj_t * pFanin; + assert( Ivy_ObjIsNode(pObj) ); + Vec_PtrRemove( vFront, pObj ); + pFanin = Ivy_ObjFanin0(pObj); + if ( !Ivy_ObjIsTravIdCurrent(pAig, pFanin) ) + { + Ivy_ObjSetTravIdCurrent(pAig, pFanin); + Vec_PtrPush( vFront, pFanin ); + } + pFanin = Ivy_ObjFanin1(pObj); + if ( !Ivy_ObjIsTravIdCurrent(pAig, pFanin) ) + { + Ivy_ObjSetTravIdCurrent(pAig, pFanin); + Vec_PtrPush( vFront, pFanin ); + } +} + +/**Function************************************************************* + + Synopsis [Compacts the number of external refs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeFaninCompact0( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront ) +{ + Ivy_Obj_t * pFanin; + int i; + Vec_PtrForEachEntry( vFront, pFanin, i ) + { + if ( Ivy_ObjIsCi(pFanin) ) + continue; + if ( Ivy_FastMapNodeWillGrow(pAig, pFanin) ) + continue; + if ( Ivy_FastMapNodeFaninCost(pAig, pFanin) <= 0 ) + { + Ivy_FastMapNodeFaninUpdate( pAig, pFanin, vFront ); + return 1; + } + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Compacts the number of external refs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeFaninCompact1( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront ) +{ + Ivy_Obj_t * pFanin; + int i; + Vec_PtrForEachEntry( vFront, pFanin, i ) + { + if ( Ivy_ObjIsCi(pFanin) ) + continue; + if ( Ivy_FastMapNodeFaninCost(pAig, pFanin) < 0 ) + { + Ivy_FastMapNodeFaninUpdate( pAig, pFanin, vFront ); + return 1; + } + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Compacts the number of external refs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeFaninCompact2( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront ) +{ + Ivy_Obj_t * pFanin; + int i; + Vec_PtrForEachEntry( vFront, pFanin, i ) + { + if ( Ivy_ObjIsCi(pFanin) ) + continue; + if ( Ivy_FastMapNodeFaninCost(pAig, pFanin) <= 0 ) + { + Ivy_FastMapNodeFaninUpdate( pAig, pFanin, vFront ); + return 1; + } + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Compacts the number of external refs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FastMapNodeFaninCompact_int( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront ) +{ + if ( Ivy_FastMapNodeFaninCompact0(pAig, pObj, nLimit, vFront) ) + return 1; + if ( Vec_PtrSize(vFront) < nLimit && Ivy_FastMapNodeFaninCompact1(pAig, pObj, nLimit, vFront) ) + return 1; + if ( Vec_PtrSize(vFront) < nLimit && Ivy_FastMapNodeFaninCompact2(pAig, pObj, nLimit, vFront) ) + return 1; + assert( Vec_PtrSize(vFront) <= nLimit ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Compacts the number of external refs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeFaninCompact( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront ) +{ + while ( Ivy_FastMapNodeFaninCompact_int( pAig, pObj, nLimit, vFront ) ); +} + +/**Function************************************************************* + + Synopsis [Prepares node mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodePrepare( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront, Vec_Ptr_t * vFrontOld ) +{ + Ivy_Supp_t * pSupp; + Ivy_Obj_t * pFanin; + int i; + pSupp = Ivy_ObjSupp( pAig, pObj ); + // expand the cut downwards from the given place + Vec_PtrClear( vFront ); + Vec_PtrClear( vFrontOld ); + Ivy_ManIncrementTravId( pAig ); + for ( i = 0; i < pSupp->nSize; i++ ) + { + pFanin = Ivy_ManObj(pAig, pSupp->pArray[i]); + Vec_PtrPush( vFront, pFanin ); + Vec_PtrPush( vFrontOld, pFanin ); + Ivy_ObjSetTravIdCurrent( pAig, pFanin ); + } + // mark the nodes in the cone + Ivy_FastMapMark_rec( pAig, pObj ); +} + +/**Function************************************************************* + + Synopsis [Updates the frontier.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeUpdate( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, Vec_Ptr_t * vFront ) +{ + Ivy_Supp_t * pSupp; + Ivy_Obj_t * pFanin; + int i; + pSupp = Ivy_ObjSupp( pAig, pObj ); + // deref node's cut + Ivy_FastMapNodeDeref( pAig, pObj ); + // update the node's cut + pSupp->nSize = Vec_PtrSize(vFront); + Vec_PtrForEachEntry( vFront, pFanin, i ) + pSupp->pArray[i] = pFanin->Id; + // ref the new cut + Ivy_FastMapNodeRef( pAig, pObj ); +} + +/**Function************************************************************* + + Synopsis [Performs area recovery for each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeRecover2( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront, Vec_Ptr_t * vFrontOld ) +{ + Ivy_Supp_t * pSupp; + int CostBef, CostAft; + int AreaBef, AreaAft; + pSupp = Ivy_ObjSupp( pAig, pObj ); +// if ( pSupp->nRefs == 0 ) +// return; + if ( pSupp->nRefs == 0 ) + AreaBef = Ivy_FastMapNodeAreaDerefed( pAig, pObj ); + else + AreaBef = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + // get the area + if ( AreaBef == 1 ) + return; + + if ( pSupp->nRefs == 0 ) + { + pSupp->nRefs = 1000000; + Ivy_FastMapNodeRef( pAig, pObj ); + } + // the cut is non-trivial + Ivy_FastMapNodePrepare( pAig, pObj, nLimit, vFront, vFrontOld ); + // iteratively modify the cut + CostBef = Ivy_FastMapCutCost( pAig, vFront ); + Ivy_FastMapNodeFaninCompact( pAig, pObj, nLimit, vFront ); + CostAft = Ivy_FastMapCutCost( pAig, vFront ); + assert( CostBef >= CostAft ); + // update the node + Ivy_FastMapNodeUpdate( pAig, pObj, vFront ); + // get the new area + AreaAft = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + if ( AreaAft > AreaBef ) + { + Ivy_FastMapNodeUpdate( pAig, pObj, vFrontOld ); + AreaAft = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + assert( AreaAft == AreaBef ); + } + if ( pSupp->nRefs == 1000000 ) + { + pSupp->nRefs = 0; + Ivy_FastMapNodeDeref( pAig, pObj ); + } +} + +/**Function************************************************************* + + Synopsis [Performs area recovery for each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeRecover( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront, Vec_Ptr_t * vFrontOld ) +{ + Ivy_Supp_t * pSupp; + int CostBef, CostAft; + int AreaBef, AreaAft; + int DelayOld; + pSupp = Ivy_ObjSupp( pAig, pObj ); + DelayOld = pSupp->Delay = Ivy_FastMapNodeDelay( pAig, pObj ); + assert( pSupp->Delay <= pSupp->DelayR ); + if ( pSupp->nRefs == 0 ) + return; + // get the area + AreaBef = Ivy_FastMapNodeAreaRefed( pAig, pObj ); +// if ( AreaBef == 1 ) +// return; + if ( pObj->Id == 102 ) + { + int x = 0; + } + // the cut is non-trivial + Ivy_FastMapNodePrepare( pAig, pObj, nLimit, vFront, vFrontOld ); + // iteratively modify the cut + Ivy_FastMapNodeDeref( pAig, pObj ); + CostBef = Ivy_FastMapCutCost( pAig, vFront ); + Ivy_FastMapNodeFaninCompact( pAig, pObj, nLimit, vFront ); + CostAft = Ivy_FastMapCutCost( pAig, vFront ); + Ivy_FastMapNodeRef( pAig, pObj ); + assert( CostBef >= CostAft ); + // update the node + Ivy_FastMapNodeUpdate( pAig, pObj, vFront ); + pSupp->Delay = Ivy_FastMapNodeDelay( pAig, pObj ); + // get the new area + AreaAft = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + if ( AreaAft > AreaBef || pSupp->Delay > pSupp->DelayR ) + { + Ivy_FastMapNodeUpdate( pAig, pObj, vFrontOld ); + AreaAft = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + assert( AreaAft == AreaBef ); + pSupp->Delay = DelayOld; + } +} + +/**Function************************************************************* + + Synopsis [Performs area recovery for each node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FastMapNodeRecover4( Ivy_Man_t * pAig, Ivy_Obj_t * pObj, int nLimit, Vec_Ptr_t * vFront, Vec_Ptr_t * vFrontOld ) +{ + Ivy_Supp_t * pSupp; + int CostBef, CostAft; + int AreaBef, AreaAft; + int DelayOld; + pSupp = Ivy_ObjSupp( pAig, pObj ); + DelayOld = pSupp->Delay = Ivy_FastMapNodeDelay( pAig, pObj ); + assert( pSupp->Delay <= pSupp->DelayR ); +// if ( pSupp->nRefs == 0 ) +// return; +// AreaBef = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + // get the area + if ( pSupp->nRefs == 0 ) + AreaBef = Ivy_FastMapNodeAreaDerefed( pAig, pObj ); + else + AreaBef = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + if ( AreaBef == 1 ) + return; + + if ( pSupp->nRefs == 0 ) + { + pSupp->nRefs = 1000000; + Ivy_FastMapNodeRef( pAig, pObj ); + } + // the cut is non-trivial + Ivy_FastMapNodePrepare( pAig, pObj, nLimit, vFront, vFrontOld ); + // iteratively modify the cut + CostBef = Ivy_FastMapCutCost( pAig, vFront ); + Ivy_FastMapNodeFaninCompact( pAig, pObj, nLimit, vFront ); + CostAft = Ivy_FastMapCutCost( pAig, vFront ); + assert( CostBef >= CostAft ); + // update the node + Ivy_FastMapNodeUpdate( pAig, pObj, vFront ); + pSupp->Delay = Ivy_FastMapNodeDelay( pAig, pObj ); + // get the new area + AreaAft = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + if ( AreaAft > AreaBef || pSupp->Delay > pSupp->DelayR ) + { + Ivy_FastMapNodeUpdate( pAig, pObj, vFrontOld ); + AreaAft = Ivy_FastMapNodeAreaRefed( pAig, pObj ); + assert( AreaAft == AreaBef ); + pSupp->Delay = DelayOld; + } + if ( pSupp->nRefs == 1000000 ) + { + pSupp->nRefs = 0; + Ivy_FastMapNodeDeref( pAig, pObj ); + } +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyFraig.c b/src/aig/ivy/ivyFraig.c new file mode 100644 index 00000000..4079b6ed --- /dev/null +++ b/src/aig/ivy/ivyFraig.c @@ -0,0 +1,2760 @@ +/**CFile**************************************************************** + + FileName [ivyFraig.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Functional reduction of AIGs] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyFraig.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "satSolver.h" +#include "extra.h" +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Ivy_FraigMan_t_ Ivy_FraigMan_t; +typedef struct Ivy_FraigSim_t_ Ivy_FraigSim_t; +typedef struct Ivy_FraigList_t_ Ivy_FraigList_t; + +struct Ivy_FraigList_t_ +{ + Ivy_Obj_t * pHead; + Ivy_Obj_t * pTail; + int nItems; +}; + +struct Ivy_FraigSim_t_ +{ + int Type; + Ivy_FraigSim_t * pNext; + Ivy_FraigSim_t * pFanin0; + Ivy_FraigSim_t * pFanin1; + unsigned pData[0]; +}; + +struct Ivy_FraigMan_t_ +{ + // general info + Ivy_FraigParams_t * pParams; // various parameters + // temporary backtrack limits because "sint64" cannot be defined in Ivy_FraigParams_t ... + sint64 nBTLimitGlobal; // global limit on the number of backtracks + sint64 nInsLimitGlobal;// global limit on the number of clause inspects + // AIG manager + Ivy_Man_t * pManAig; // the starting AIG manager + Ivy_Man_t * pManFraig; // the final AIG manager + // simulation information + int nSimWords; // the number of words + char * pSimWords; // the simulation info + Ivy_FraigSim_t * pSimStart; // the list of simulation info for internal nodes + // counter example storage + int nPatWords; // the number of words in the counter example + unsigned * pPatWords; // the counter example + int * pPatScores; // the scores of each pattern + // equivalence classes + Ivy_FraigList_t lClasses; // equivalence classes + Ivy_FraigList_t lCand; // candidatates + int nPairs; // the number of pairs of nodes + // equivalence checking + sat_solver * pSat; // SAT solver + int nSatVars; // the number of variables currently used + Vec_Ptr_t * vPiVars; // the PIs of the cone used + // other + ProgressBar * pProgress; + // statistics + int nSimRounds; + int nNodesMiter; + int nClassesZero; + int nClassesBeg; + int nClassesEnd; + int nPairsBeg; + int nPairsEnd; + int nSatCalls; + int nSatCallsSat; + int nSatCallsUnsat; + int nSatProof; + int nSatFails; + int nSatFailsReal; + // runtime + int timeSim; + int timeTrav; + int timeSat; + int timeSatUnsat; + int timeSatSat; + int timeSatFail; + int timeRef; + int timeTotal; + int time1; + int time2; +}; + +typedef struct Prove_ParamsStruct_t_ Prove_Params_t; +struct Prove_ParamsStruct_t_ +{ + // general parameters + int fUseFraiging; // enables fraiging + int fUseRewriting; // enables rewriting + int fUseBdds; // enables BDD construction when other methods fail + int fVerbose; // prints verbose stats + // iterations + int nItersMax; // the number of iterations + // mitering + int nMiteringLimitStart; // starting mitering limit + float nMiteringLimitMulti; // multiplicative coefficient to increase the limit in each iteration + // rewriting + int nRewritingLimitStart; // the number of rewriting iterations + float nRewritingLimitMulti; // multiplicative coefficient to increase the limit in each iteration + // fraiging + int nFraigingLimitStart; // starting backtrack(conflict) limit + float nFraigingLimitMulti; // multiplicative coefficient to increase the limit in each iteration + // last-gasp BDD construction + int nBddSizeLimit; // the number of BDD nodes when construction is aborted + int fBddReorder; // enables dynamic BDD variable reordering + // last-gasp mitering + int nMiteringLimitLast; // final mitering limit + // global SAT solver limits + sint64 nTotalBacktrackLimit; // global limit on the number of backtracks + sint64 nTotalInspectLimit; // global limit on the number of clause inspects + // global resources applied + sint64 nTotalBacktracksMade; // the total number of backtracks made + sint64 nTotalInspectsMade; // the total number of inspects made +}; + +static inline Ivy_FraigSim_t * Ivy_ObjSim( Ivy_Obj_t * pObj ) { return (Ivy_FraigSim_t *)pObj->pFanout; } +static inline Ivy_Obj_t * Ivy_ObjClassNodeLast( Ivy_Obj_t * pObj ) { return pObj->pNextFan0; } +static inline Ivy_Obj_t * Ivy_ObjClassNodeRepr( Ivy_Obj_t * pObj ) { return pObj->pNextFan0; } +static inline Ivy_Obj_t * Ivy_ObjClassNodeNext( Ivy_Obj_t * pObj ) { return pObj->pNextFan1; } +static inline Ivy_Obj_t * Ivy_ObjNodeHashNext( Ivy_Obj_t * pObj ) { return pObj->pPrevFan0; } +static inline Ivy_Obj_t * Ivy_ObjEquivListNext( Ivy_Obj_t * pObj ) { return pObj->pPrevFan0; } +static inline Ivy_Obj_t * Ivy_ObjEquivListPrev( Ivy_Obj_t * pObj ) { return pObj->pPrevFan1; } +static inline Ivy_Obj_t * Ivy_ObjFraig( Ivy_Obj_t * pObj ) { return pObj->pEquiv; } +static inline int Ivy_ObjSatNum( Ivy_Obj_t * pObj ) { return (int)pObj->pNextFan0; } +static inline Vec_Ptr_t * Ivy_ObjFaninVec( Ivy_Obj_t * pObj ) { return (Vec_Ptr_t *)pObj->pNextFan1; } + +static inline void Ivy_ObjSetSim( Ivy_Obj_t * pObj, Ivy_FraigSim_t * pSim ) { pObj->pFanout = (Ivy_Obj_t *)pSim; } +static inline void Ivy_ObjSetClassNodeLast( Ivy_Obj_t * pObj, Ivy_Obj_t * pLast ) { pObj->pNextFan0 = pLast; } +static inline void Ivy_ObjSetClassNodeRepr( Ivy_Obj_t * pObj, Ivy_Obj_t * pRepr ) { pObj->pNextFan0 = pRepr; } +static inline void Ivy_ObjSetClassNodeNext( Ivy_Obj_t * pObj, Ivy_Obj_t * pNext ) { pObj->pNextFan1 = pNext; } +static inline void Ivy_ObjSetNodeHashNext( Ivy_Obj_t * pObj, Ivy_Obj_t * pNext ) { pObj->pPrevFan0 = pNext; } +static inline void Ivy_ObjSetEquivListNext( Ivy_Obj_t * pObj, Ivy_Obj_t * pNext ) { pObj->pPrevFan0 = pNext; } +static inline void Ivy_ObjSetEquivListPrev( Ivy_Obj_t * pObj, Ivy_Obj_t * pPrev ) { pObj->pPrevFan1 = pPrev; } +static inline void Ivy_ObjSetFraig( Ivy_Obj_t * pObj, Ivy_Obj_t * pNode ) { pObj->pEquiv = pNode; } +static inline void Ivy_ObjSetSatNum( Ivy_Obj_t * pObj, int Num ) { pObj->pNextFan0 = (Ivy_Obj_t *)Num; } +static inline void Ivy_ObjSetFaninVec( Ivy_Obj_t * pObj, Vec_Ptr_t * vFanins ) { pObj->pNextFan1 = (Ivy_Obj_t *)vFanins; } + +static inline unsigned Ivy_ObjRandomSim() { return (rand() << 24) ^ (rand() << 12) ^ rand(); } + +// iterate through equivalence classes +#define Ivy_FraigForEachEquivClass( pList, pEnt ) \ + for ( pEnt = pList; \ + pEnt; \ + pEnt = Ivy_ObjEquivListNext(pEnt) ) +#define Ivy_FraigForEachEquivClassSafe( pList, pEnt, pEnt2 ) \ + for ( pEnt = pList, \ + pEnt2 = pEnt? Ivy_ObjEquivListNext(pEnt): NULL; \ + pEnt; \ + pEnt = pEnt2, \ + pEnt2 = pEnt? Ivy_ObjEquivListNext(pEnt): NULL ) +// iterate through nodes in one class +#define Ivy_FraigForEachClassNode( pClass, pEnt ) \ + for ( pEnt = pClass; \ + pEnt; \ + pEnt = Ivy_ObjClassNodeNext(pEnt) ) +// iterate through nodes in the hash table +#define Ivy_FraigForEachBinNode( pBin, pEnt ) \ + for ( pEnt = pBin; \ + pEnt; \ + pEnt = Ivy_ObjNodeHashNext(pEnt) ) + +static Ivy_FraigMan_t * Ivy_FraigStart( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ); +static Ivy_FraigMan_t * Ivy_FraigStartSimple( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ); +static Ivy_Man_t * Ivy_FraigPerform_int( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams, sint64 nBTLimitGlobal, sint64 nInsLimitGlobal, sint64 * pnSatConfs, sint64 * pnSatInspects ); +static void Ivy_FraigPrint( Ivy_FraigMan_t * p ); +static void Ivy_FraigStop( Ivy_FraigMan_t * p ); +static void Ivy_FraigSimulate( Ivy_FraigMan_t * p ); +static void Ivy_FraigSweep( Ivy_FraigMan_t * p ); +static Ivy_Obj_t * Ivy_FraigAnd( Ivy_FraigMan_t * p, Ivy_Obj_t * pObjOld ); +static int Ivy_FraigNodesAreEquiv( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj0, Ivy_Obj_t * pObj1 ); +static int Ivy_FraigNodeIsConst( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ); +static void Ivy_FraigNodeAddToSolver( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj0, Ivy_Obj_t * pObj1 ); +static int Ivy_FraigSetActivityFactors( Ivy_FraigMan_t * p, Ivy_Obj_t * pOld, Ivy_Obj_t * pNew ); +static void Ivy_FraigAddToPatScores( Ivy_FraigMan_t * p, Ivy_Obj_t * pClass, Ivy_Obj_t * pClassNew ); +static int Ivy_FraigMiterStatus( Ivy_Man_t * pMan ); +static void Ivy_FraigMiterProve( Ivy_FraigMan_t * p ); +static void Ivy_FraigMiterPrint( Ivy_Man_t * pNtk, char * pString, int clk, int fVerbose ); +static int * Ivy_FraigCreateModel( Ivy_FraigMan_t * p ); + +static int Ivy_FraigNodesAreEquivBdd( Ivy_Obj_t * pObj1, Ivy_Obj_t * pObj2 ); + +static sint64 s_nBTLimitGlobal = 0; +static sint64 s_nInsLimitGlobal = 0; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Sets the default solving parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigParamsDefault( Ivy_FraigParams_t * pParams ) +{ + memset( pParams, 0, sizeof(Ivy_FraigParams_t) ); + pParams->nSimWords = 32; // the number of words in the simulation info + pParams->dSimSatur = 0.005; // the ratio of refined classes when saturation is reached + pParams->fPatScores = 0; // enables simulation pattern scoring + pParams->MaxScore = 25; // max score after which resimulation is used + pParams->fDoSparse = 1; // skips sparse functions +// pParams->dActConeRatio = 0.05; // the ratio of cone to be bumped +// pParams->dActConeBumpMax = 5.0; // the largest bump of activity + pParams->dActConeRatio = 0.3; // the ratio of cone to be bumped + pParams->dActConeBumpMax = 10.0; // the largest bump of activity + + pParams->nBTLimitNode = 100; // conflict limit at a node + pParams->nBTLimitMiter = 500000; // conflict limit at an output +// pParams->nBTLimitGlobal = 0; // conflict limit global +// pParams->nInsLimitGlobal = 0; // inspection limit global +} + +/**Function************************************************************* + + Synopsis [Performs combinational equivalence checking for the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigProve( Ivy_Man_t ** ppManAig, void * pPars ) +{ + Prove_Params_t * pParams = pPars; + Ivy_FraigParams_t Params, * pIvyParams = &Params; + Ivy_Man_t * pManAig, * pManTemp; + int RetValue, nIter, clk, timeStart = clock();//, Counter; + sint64 nSatConfs, nSatInspects; + + // start the network and parameters + pManAig = *ppManAig; + Ivy_FraigParamsDefault( pIvyParams ); + pIvyParams->fVerbose = pParams->fVerbose; + pIvyParams->fProve = 1; + + if ( pParams->fVerbose ) + { + printf( "RESOURCE LIMITS: Iterations = %d. Rewriting = %s. Fraiging = %s.\n", + pParams->nItersMax, pParams->fUseRewriting? "yes":"no", pParams->fUseFraiging? "yes":"no" ); + printf( "Miter = %d (%3.1f). Rwr = %d (%3.1f). Fraig = %d (%3.1f). Last = %d.\n", + pParams->nMiteringLimitStart, pParams->nMiteringLimitMulti, + pParams->nRewritingLimitStart, pParams->nRewritingLimitMulti, + pParams->nFraigingLimitStart, pParams->nFraigingLimitMulti, pParams->nMiteringLimitLast ); + } + + // if SAT only, solve without iteration + if ( !pParams->fUseRewriting && !pParams->fUseFraiging ) + { + clk = clock(); + pIvyParams->nBTLimitMiter = pParams->nMiteringLimitLast / Ivy_ManPoNum(pManAig); + pManAig = Ivy_FraigMiter( pManTemp = pManAig, pIvyParams ); Ivy_ManStop( pManTemp ); + RetValue = Ivy_FraigMiterStatus( pManAig ); + Ivy_FraigMiterPrint( pManAig, "SAT solving", clk, pParams->fVerbose ); + *ppManAig = pManAig; + return RetValue; + } + + if ( Ivy_ManNodeNum(pManAig) < 500 ) + { + // run the first mitering + clk = clock(); + pIvyParams->nBTLimitMiter = pParams->nMiteringLimitStart / Ivy_ManPoNum(pManAig); + pManAig = Ivy_FraigMiter( pManTemp = pManAig, pIvyParams ); Ivy_ManStop( pManTemp ); + RetValue = Ivy_FraigMiterStatus( pManAig ); + Ivy_FraigMiterPrint( pManAig, "SAT solving", clk, pParams->fVerbose ); + if ( RetValue >= 0 ) + { + *ppManAig = pManAig; + return RetValue; + } + } + + // check the current resource limits + RetValue = -1; + for ( nIter = 0; nIter < pParams->nItersMax; nIter++ ) + { + if ( pParams->fVerbose ) + { + printf( "ITERATION %2d : Confs = %6d. FraigBTL = %3d. \n", nIter+1, + (int)(pParams->nMiteringLimitStart * pow(pParams->nMiteringLimitMulti,nIter)), + (int)(pParams->nFraigingLimitStart * pow(pParams->nFraigingLimitMulti,nIter)) ); + fflush( stdout ); + } + + // try rewriting + if ( pParams->fUseRewriting ) + { // bug in Ivy_NodeFindCutsAll() when leaves are identical! +/* + clk = clock(); + Counter = (int)(pParams->nRewritingLimitStart * pow(pParams->nRewritingLimitMulti,nIter)); + pManAig = Ivy_ManRwsat( pManAig, 0 ); + RetValue = Ivy_FraigMiterStatus( pManAig ); + Ivy_FraigMiterPrint( pManAig, "Rewriting ", clk, pParams->fVerbose ); +*/ + } + if ( RetValue >= 0 ) + break; + + // try fraiging followed by mitering + if ( pParams->fUseFraiging ) + { + clk = clock(); + pIvyParams->nBTLimitNode = (int)(pParams->nFraigingLimitStart * pow(pParams->nFraigingLimitMulti,nIter)); + pIvyParams->nBTLimitMiter = (int)(pParams->nMiteringLimitStart * pow(pParams->nMiteringLimitMulti,nIter)) / Ivy_ManPoNum(pManAig); + pManAig = Ivy_FraigPerform_int( pManTemp = pManAig, pIvyParams, pParams->nTotalBacktrackLimit, pParams->nTotalInspectLimit, &nSatConfs, &nSatInspects ); Ivy_ManStop( pManTemp ); + RetValue = Ivy_FraigMiterStatus( pManAig ); + Ivy_FraigMiterPrint( pManAig, "Fraiging ", clk, pParams->fVerbose ); + } + if ( RetValue >= 0 ) + break; + + // add to the number of backtracks and inspects + pParams->nTotalBacktracksMade += nSatConfs; + pParams->nTotalInspectsMade += nSatInspects; + // check if global resource limit is reached + if ( (pParams->nTotalBacktrackLimit && pParams->nTotalBacktracksMade >= pParams->nTotalBacktrackLimit) || + (pParams->nTotalInspectLimit && pParams->nTotalInspectsMade >= pParams->nTotalInspectLimit) ) + { + printf( "Reached global limit on conflicts/inspects. Quitting.\n" ); + *ppManAig = pManAig; + return -1; + } + } + + if ( RetValue < 0 ) + { + if ( pParams->fVerbose ) + { + printf( "Attempting SAT with conflict limit %d ...\n", pParams->nMiteringLimitLast ); + fflush( stdout ); + } + clk = clock(); + pIvyParams->nBTLimitMiter = pParams->nMiteringLimitLast / Ivy_ManPoNum(pManAig); + if ( pParams->nTotalBacktrackLimit ) + s_nBTLimitGlobal = pParams->nTotalBacktrackLimit - pParams->nTotalBacktracksMade; + if ( pParams->nTotalInspectLimit ) + s_nInsLimitGlobal = pParams->nTotalInspectLimit - pParams->nTotalInspectsMade; + pManAig = Ivy_FraigMiter( pManTemp = pManAig, pIvyParams ); Ivy_ManStop( pManTemp ); + s_nBTLimitGlobal = 0; + s_nInsLimitGlobal = 0; + RetValue = Ivy_FraigMiterStatus( pManAig ); + Ivy_FraigMiterPrint( pManAig, "SAT solving", clk, pParams->fVerbose ); + // make sure that the sover never returns "undecided" when infinite resource limits are set + if( RetValue == -1 && pParams->nTotalInspectLimit == 0 && + pParams->nTotalBacktrackLimit == 0 ) + { + extern void Prove_ParamsPrint( Prove_Params_t * pParams ); + Prove_ParamsPrint( pParams ); + printf("ERROR: ABC has returned \"undecided\" in spite of no limits...\n"); + exit(1); + } + } + + // assign the model if it was proved by rewriting (const 1 miter) + if ( RetValue == 0 && pManAig->pData == NULL ) + { + pManAig->pData = ALLOC( int, Ivy_ManPiNum(pManAig) ); + memset( pManAig->pData, 0, sizeof(int) * Ivy_ManPiNum(pManAig) ); + } + *ppManAig = pManAig; + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Performs fraiging of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_FraigPerform_int( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams, sint64 nBTLimitGlobal, sint64 nInsLimitGlobal, sint64 * pnSatConfs, sint64 * pnSatInspects ) +{ + Ivy_FraigMan_t * p; + Ivy_Man_t * pManAigNew; + int clk; + if ( Ivy_ManNodeNum(pManAig) == 0 ) + return Ivy_ManDup(pManAig); +clk = clock(); + assert( Ivy_ManLatchNum(pManAig) == 0 ); + p = Ivy_FraigStart( pManAig, pParams ); + // set global limits + p->nBTLimitGlobal = nBTLimitGlobal; + p->nInsLimitGlobal = nInsLimitGlobal; + + Ivy_FraigSimulate( p ); + Ivy_FraigSweep( p ); + pManAigNew = p->pManFraig; +p->timeTotal = clock() - clk; + if ( pnSatConfs ) + *pnSatConfs = p->pSat? p->pSat->stats.conflicts : 0; + if ( pnSatInspects ) + *pnSatInspects = p->pSat? p->pSat->stats.inspects : 0; + Ivy_FraigStop( p ); + return pManAigNew; +} + +/**Function************************************************************* + + Synopsis [Performs fraiging of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_FraigPerform( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ) +{ + Ivy_FraigMan_t * p; + Ivy_Man_t * pManAigNew; + int clk; + if ( Ivy_ManNodeNum(pManAig) == 0 ) + return Ivy_ManDup(pManAig); +clk = clock(); + assert( Ivy_ManLatchNum(pManAig) == 0 ); + p = Ivy_FraigStart( pManAig, pParams ); + Ivy_FraigSimulate( p ); + Ivy_FraigSweep( p ); + pManAigNew = p->pManFraig; +p->timeTotal = clock() - clk; + Ivy_FraigStop( p ); + return pManAigNew; +} + +/**Function************************************************************* + + Synopsis [Applies brute-force SAT to the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_FraigMiter( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ) +{ + Ivy_FraigMan_t * p; + Ivy_Man_t * pManAigNew; + Ivy_Obj_t * pObj; + int i, clk; +clk = clock(); + assert( Ivy_ManLatchNum(pManAig) == 0 ); + p = Ivy_FraigStartSimple( pManAig, pParams ); + // set global limits + p->nBTLimitGlobal = s_nBTLimitGlobal; + p->nInsLimitGlobal = s_nInsLimitGlobal; + // duplicate internal nodes + Ivy_ManForEachNode( p->pManAig, pObj, i ) + pObj->pEquiv = Ivy_And( p->pManFraig, Ivy_ObjChild0Equiv(pObj), Ivy_ObjChild1Equiv(pObj) ); + // try to prove each output of the miter + Ivy_FraigMiterProve( p ); + // add the POs + Ivy_ManForEachPo( p->pManAig, pObj, i ) + Ivy_ObjCreatePo( p->pManFraig, Ivy_ObjChild0Equiv(pObj) ); + // clean the new manager + Ivy_ManForEachObj( p->pManFraig, pObj, i ) + { + if ( Ivy_ObjFaninVec(pObj) ) + Vec_PtrFree( Ivy_ObjFaninVec(pObj) ); + pObj->pNextFan0 = pObj->pNextFan1 = NULL; + } + // remove dangling nodes + Ivy_ManCleanup( p->pManFraig ); + pManAigNew = p->pManFraig; +p->timeTotal = clock() - clk; + +//printf( "Final nodes = %6d. ", Ivy_ManNodeNum(pManAigNew) ); +//PRT( "Time", p->timeTotal ); + Ivy_FraigStop( p ); + return pManAigNew; +} + +/**Function************************************************************* + + Synopsis [Starts the fraiging manager without simulation info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_FraigMan_t * Ivy_FraigStartSimple( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ) +{ + Ivy_FraigMan_t * p; + // allocat the fraiging manager + p = ALLOC( Ivy_FraigMan_t, 1 ); + memset( p, 0, sizeof(Ivy_FraigMan_t) ); + p->pParams = pParams; + p->pManAig = pManAig; + p->pManFraig = Ivy_ManStartFrom( pManAig ); + p->vPiVars = Vec_PtrAlloc( 100 ); + return p; +} + +/**Function************************************************************* + + Synopsis [Starts the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_FraigMan_t * Ivy_FraigStart( Ivy_Man_t * pManAig, Ivy_FraigParams_t * pParams ) +{ + Ivy_FraigMan_t * p; + Ivy_FraigSim_t * pSims; + Ivy_Obj_t * pObj; + int i, k, EntrySize; + // clean the fanout representation + Ivy_ManForEachObj( pManAig, pObj, i ) +// pObj->pEquiv = pObj->pFanout = pObj->pNextFan0 = pObj->pNextFan1 = pObj->pPrevFan0 = pObj->pPrevFan1 = NULL; + assert( !pObj->pEquiv && !pObj->pFanout ); + // allocat the fraiging manager + p = ALLOC( Ivy_FraigMan_t, 1 ); + memset( p, 0, sizeof(Ivy_FraigMan_t) ); + p->pParams = pParams; + p->pManAig = pManAig; + p->pManFraig = Ivy_ManStartFrom( pManAig ); + // allocate simulation info + p->nSimWords = pParams->nSimWords; +// p->pSimWords = ALLOC( unsigned, Ivy_ManObjNum(pManAig) * p->nSimWords ); + EntrySize = sizeof(Ivy_FraigSim_t) + sizeof(unsigned) * p->nSimWords; + p->pSimWords = (char *)malloc( Ivy_ManObjNum(pManAig) * EntrySize ); + memset( p->pSimWords, 0, EntrySize ); + k = 0; + Ivy_ManForEachObj( pManAig, pObj, i ) + { + pSims = (Ivy_FraigSim_t *)(p->pSimWords + EntrySize * k++); + pSims->pNext = NULL; + if ( Ivy_ObjIsNode(pObj) ) + { + if ( p->pSimStart == NULL ) + p->pSimStart = pSims; + else + ((Ivy_FraigSim_t *)(p->pSimWords + EntrySize * (k-2)))->pNext = pSims; + pSims->pFanin0 = Ivy_ObjSim( Ivy_ObjFanin0(pObj) ); + pSims->pFanin1 = Ivy_ObjSim( Ivy_ObjFanin1(pObj) ); + pSims->Type = (Ivy_ObjFaninPhase(Ivy_ObjChild0(pObj)) << 2) | (Ivy_ObjFaninPhase(Ivy_ObjChild1(pObj)) << 1) | pObj->fPhase; + } + else + { + pSims->pFanin0 = NULL; + pSims->pFanin1 = NULL; + pSims->Type = 0; + } + Ivy_ObjSetSim( pObj, pSims ); + } + assert( k == Ivy_ManObjNum(pManAig) ); + // allocate storage for sim pattern + p->nPatWords = Ivy_BitWordNum( Ivy_ManPiNum(pManAig) ); + p->pPatWords = ALLOC( unsigned, p->nPatWords ); + p->pPatScores = ALLOC( int, 32 * p->nSimWords ); + p->vPiVars = Vec_PtrAlloc( 100 ); + // set random number generator + srand( 0xABCABC ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigStop( Ivy_FraigMan_t * p ) +{ + if ( p->pParams->fVerbose ) + Ivy_FraigPrint( p ); + if ( p->vPiVars ) Vec_PtrFree( p->vPiVars ); + if ( p->pSat ) sat_solver_delete( p->pSat ); + FREE( p->pPatScores ); + FREE( p->pPatWords ); + FREE( p->pSimWords ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Prints stats for the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigPrint( Ivy_FraigMan_t * p ) +{ + double nMemory; + nMemory = (double)Ivy_ManObjNum(p->pManAig)*p->nSimWords*sizeof(unsigned)/(1<<20); + printf( "SimWords = %d. Rounds = %d. Mem = %0.2f Mb. ", p->nSimWords, p->nSimRounds, nMemory ); + printf( "Classes: Beg = %d. End = %d.\n", p->nClassesBeg, p->nClassesEnd ); +// printf( "Limits: BTNode = %d. BTMiter = %d.\n", p->pParams->nBTLimitNode, p->pParams->nBTLimitMiter ); + printf( "Proof = %d. Counter-example = %d. Fail = %d. FailReal = %d. Zero = %d.\n", + p->nSatProof, p->nSatCallsSat, p->nSatFails, p->nSatFailsReal, p->nClassesZero ); + printf( "Final = %d. Miter = %d. Total = %d. Mux = %d. (Exor = %d.) SatVars = %d.\n", + Ivy_ManNodeNum(p->pManFraig), p->nNodesMiter, Ivy_ManNodeNum(p->pManAig), 0, 0, p->nSatVars ); + if ( p->pSat ) Sat_SolverPrintStats( stdout, p->pSat ); + PRT( "AIG simulation ", p->timeSim ); + PRT( "AIG traversal ", p->timeTrav ); + PRT( "SAT solving ", p->timeSat ); + PRT( " Unsat ", p->timeSatUnsat ); + PRT( " Sat ", p->timeSatSat ); + PRT( " Fail ", p->timeSatFail ); + PRT( "Class refining ", p->timeRef ); + PRT( "TOTAL RUNTIME ", p->timeTotal ); + if ( p->time1 ) { PRT( "time1 ", p->time1 ); } +} + + + +/**Function************************************************************* + + Synopsis [Assigns random patterns to the PI node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeAssignRandom( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_FraigSim_t * pSims; + int i; + assert( Ivy_ObjIsPi(pObj) ); + pSims = Ivy_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = Ivy_ObjRandomSim(); +} + +/**Function************************************************************* + + Synopsis [Assigns constant patterns to the PI node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeAssignConst( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj, int fConst1 ) +{ + Ivy_FraigSim_t * pSims; + int i; + assert( Ivy_ObjIsPi(pObj) ); + pSims = Ivy_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = fConst1? ~(unsigned)0 : 0; +} + +/**Function************************************************************* + + Synopsis [Assings random simulation info for the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigAssignRandom( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + Ivy_ManForEachPi( p->pManAig, pObj, i ) + Ivy_NodeAssignRandom( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Assings distance-1 simulation info for the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigAssignDist1( Ivy_FraigMan_t * p, unsigned * pPat ) +{ + Ivy_Obj_t * pObj; + int i, Limit; + Ivy_ManForEachPi( p->pManAig, pObj, i ) + { + Ivy_NodeAssignConst( p, pObj, Ivy_InfoHasBit(pPat, i) ); +// printf( "%d", Ivy_InfoHasBit(pPat, i) ); + } +// printf( "\n" ); + + Limit = IVY_MIN( Ivy_ManPiNum(p->pManAig), p->nSimWords * 32 - 1 ); + for ( i = 0; i < Limit; i++ ) + Ivy_InfoXorBit( Ivy_ObjSim( Ivy_ManPi(p->pManAig,i) )->pData, i+1 ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation info is composed of all zeros.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeHasZeroSim( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_FraigSim_t * pSims; + int i; + pSims = Ivy_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + if ( pSims->pData[i] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation info is composed of all zeros.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeComplementSim( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_FraigSim_t * pSims; + int i; + pSims = Ivy_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = ~pSims->pData[i]; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation infos are equal.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeCompareSims( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj0, Ivy_Obj_t * pObj1 ) +{ + Ivy_FraigSim_t * pSims0, * pSims1; + int i; + pSims0 = Ivy_ObjSim(pObj0); + pSims1 = Ivy_ObjSim(pObj1); + for ( i = 0; i < p->nSimWords; i++ ) + if ( pSims0->pData[i] != pSims1->pData[i] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Simulates one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeSimulateSim( Ivy_FraigMan_t * p, Ivy_FraigSim_t * pSims ) +{ + unsigned * pData, * pData0, * pData1; + int i; + pData = pSims->pData; + pData0 = pSims->pFanin0->pData; + pData1 = pSims->pFanin1->pData; + switch( pSims->Type ) + { + case 0: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = (pData0[i] & pData1[i]); + break; + case 1: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = ~(pData0[i] & pData1[i]); + break; + case 2: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = (pData0[i] & ~pData1[i]); + break; + case 3: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = (~pData0[i] | pData1[i]); + break; + case 4: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = (~pData0[i] & pData1[i]); + break; + case 5: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = (pData0[i] | ~pData1[i]); + break; + case 6: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = ~(pData0[i] | pData1[i]); + break; + case 7: + for ( i = 0; i < p->nSimWords; i++ ) + pData[i] = (pData0[i] | pData1[i]); + break; + } +} + +/**Function************************************************************* + + Synopsis [Simulates one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeSimulate( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_FraigSim_t * pSims, * pSims0, * pSims1; + int fCompl, fCompl0, fCompl1, i; + assert( !Ivy_IsComplement(pObj) ); + // get hold of the simulation information + pSims = Ivy_ObjSim(pObj); + pSims0 = Ivy_ObjSim(Ivy_ObjFanin0(pObj)); + pSims1 = Ivy_ObjSim(Ivy_ObjFanin1(pObj)); + // get complemented attributes of the children using their random info + fCompl = pObj->fPhase; + fCompl0 = Ivy_ObjFaninPhase(Ivy_ObjChild0(pObj)); + fCompl1 = Ivy_ObjFaninPhase(Ivy_ObjChild1(pObj)); + // simulate + if ( fCompl0 && fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = (pSims0->pData[i] | pSims1->pData[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = ~(pSims0->pData[i] | pSims1->pData[i]); + } + else if ( fCompl0 && !fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = (pSims0->pData[i] | ~pSims1->pData[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = (~pSims0->pData[i] & pSims1->pData[i]); + } + else if ( !fCompl0 && fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = (~pSims0->pData[i] | pSims1->pData[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = (pSims0->pData[i] & ~pSims1->pData[i]); + } + else // if ( !fCompl0 && !fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = ~(pSims0->pData[i] & pSims1->pData[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims->pData[i] = (pSims0->pData[i] & pSims1->pData[i]); + } +} + +/**Function************************************************************* + + Synopsis [Computes hash value using simulation info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_NodeHash( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ) +{ + static int s_FPrimes[128] = { + 1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459, + 1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997, + 2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543, + 2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089, + 3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671, + 3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243, + 4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871, + 4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471, + 5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073, + 6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689, + 6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309, + 7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933, + 8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147 + }; + Ivy_FraigSim_t * pSims; + unsigned uHash; + int i; + assert( p->nSimWords <= 128 ); + uHash = 0; + pSims = Ivy_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + uHash ^= pSims->pData[i] * s_FPrimes[i]; + return uHash; +} + +/**Function************************************************************* + + Synopsis [Simulates AIG manager.] + + Description [Assumes that the PI simulation info is attached.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSimulateOne( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj; + int i, clk; +clk = clock(); + Ivy_ManForEachNode( p->pManAig, pObj, i ) + { + Ivy_NodeSimulate( p, pObj ); +/* + if ( Ivy_ObjFraig(pObj) == NULL ) + printf( "%3d --- -- %d : ", pObj->Id, pObj->fPhase ); + else + printf( "%3d %3d %2d %d : ", pObj->Id, Ivy_Regular(Ivy_ObjFraig(pObj))->Id, Ivy_ObjSatNum(Ivy_Regular(Ivy_ObjFraig(pObj))), pObj->fPhase ); + Extra_PrintBinary( stdout, Ivy_ObjSim(pObj), 30 ); + printf( "\n" ); +*/ + } +p->timeSim += clock() - clk; +p->nSimRounds++; +} + +/**Function************************************************************* + + Synopsis [Simulates AIG manager.] + + Description [Assumes that the PI simulation info is attached.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSimulateOneSim( Ivy_FraigMan_t * p ) +{ + Ivy_FraigSim_t * pSims; + int clk; +clk = clock(); + for ( pSims = p->pSimStart; pSims; pSims = pSims->pNext ) + Ivy_NodeSimulateSim( p, pSims ); +p->timeSim += clock() - clk; +p->nSimRounds++; +} + +/**Function************************************************************* + + Synopsis [Adds one node to the equivalence class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeAddToClass( Ivy_Obj_t * pClass, Ivy_Obj_t * pObj ) +{ + if ( Ivy_ObjClassNodeNext(pClass) == NULL ) + Ivy_ObjSetClassNodeNext( pClass, pObj ); + else + Ivy_ObjSetClassNodeNext( Ivy_ObjClassNodeLast(pClass), pObj ); + Ivy_ObjSetClassNodeLast( pClass, pObj ); + Ivy_ObjSetClassNodeRepr( pObj, pClass ); + Ivy_ObjSetClassNodeNext( pObj, NULL ); +} + +/**Function************************************************************* + + Synopsis [Adds equivalence class to the list of classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigAddClass( Ivy_FraigList_t * pList, Ivy_Obj_t * pClass ) +{ + if ( pList->pHead == NULL ) + { + pList->pHead = pClass; + pList->pTail = pClass; + Ivy_ObjSetEquivListPrev( pClass, NULL ); + Ivy_ObjSetEquivListNext( pClass, NULL ); + } + else + { + Ivy_ObjSetEquivListNext( pList->pTail, pClass ); + Ivy_ObjSetEquivListPrev( pClass, pList->pTail ); + Ivy_ObjSetEquivListNext( pClass, NULL ); + pList->pTail = pClass; + } + pList->nItems++; +} + +/**Function************************************************************* + + Synopsis [Updates the list of classes after base class has split.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigInsertClass( Ivy_FraigList_t * pList, Ivy_Obj_t * pBase, Ivy_Obj_t * pClass ) +{ + Ivy_ObjSetEquivListPrev( pClass, pBase ); + Ivy_ObjSetEquivListNext( pClass, Ivy_ObjEquivListNext(pBase) ); + if ( Ivy_ObjEquivListNext(pBase) ) + Ivy_ObjSetEquivListPrev( Ivy_ObjEquivListNext(pBase), pClass ); + Ivy_ObjSetEquivListNext( pBase, pClass ); + if ( pList->pTail == pBase ) + pList->pTail = pClass; + pList->nItems++; +} + +/**Function************************************************************* + + Synopsis [Removes equivalence class from the list of classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigRemoveClass( Ivy_FraigList_t * pList, Ivy_Obj_t * pClass ) +{ + if ( pList->pHead == pClass ) + pList->pHead = Ivy_ObjEquivListNext(pClass); + if ( pList->pTail == pClass ) + pList->pTail = Ivy_ObjEquivListPrev(pClass); + if ( Ivy_ObjEquivListPrev(pClass) ) + Ivy_ObjSetEquivListNext( Ivy_ObjEquivListPrev(pClass), Ivy_ObjEquivListNext(pClass) ); + if ( Ivy_ObjEquivListNext(pClass) ) + Ivy_ObjSetEquivListPrev( Ivy_ObjEquivListNext(pClass), Ivy_ObjEquivListPrev(pClass) ); + Ivy_ObjSetEquivListNext( pClass, NULL ); + Ivy_ObjSetEquivListPrev( pClass, NULL ); + pClass->fMarkA = 0; + pList->nItems--; +} + +/**Function************************************************************* + + Synopsis [Count the number of pairs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigCountPairsClasses( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pClass, * pNode; + int nPairs = 0, nNodes; + return nPairs; + + Ivy_FraigForEachEquivClass( p->lClasses.pHead, pClass ) + { + nNodes = 0; + Ivy_FraigForEachClassNode( pClass, pNode ) + nNodes++; + nPairs += nNodes * (nNodes - 1) / 2; + } + return nPairs; +} + +/**Function************************************************************* + + Synopsis [Creates initial simulation classes.] + + Description [Assumes that simulation info is assigned.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigCreateClasses( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t ** pTable; + Ivy_Obj_t * pObj, * pConst1, * pBin, * pEntry; + int i, nTableSize; + unsigned Hash; + pConst1 = Ivy_ManConst1(p->pManAig); + // allocate the table + nTableSize = Ivy_ManObjNum(p->pManAig) / 2 + 13; + pTable = ALLOC( Ivy_Obj_t *, nTableSize ); + memset( pTable, 0, sizeof(Ivy_Obj_t *) * nTableSize ); + // collect nodes into the table + Ivy_ManForEachObj( p->pManAig, pObj, i ) + { + if ( !Ivy_ObjIsPi(pObj) && !Ivy_ObjIsNode(pObj) ) + continue; + Hash = Ivy_NodeHash( p, pObj ); + if ( Hash == 0 && Ivy_NodeHasZeroSim( p, pObj ) ) + { + Ivy_NodeAddToClass( pConst1, pObj ); + continue; + } + // add the node to the table + pBin = pTable[Hash % nTableSize]; + Ivy_FraigForEachBinNode( pBin, pEntry ) + if ( Ivy_NodeCompareSims( p, pEntry, pObj ) ) + { + Ivy_NodeAddToClass( pEntry, pObj ); + break; + } + // check if the entry was added + if ( pEntry ) + continue; + Ivy_ObjSetNodeHashNext( pObj, pBin ); + pTable[Hash % nTableSize] = pObj; + } + // collect non-trivial classes + assert( p->lClasses.pHead == NULL ); + Ivy_ManForEachObj( p->pManAig, pObj, i ) + { + if ( !Ivy_ObjIsConst1(pObj) && !Ivy_ObjIsPi(pObj) && !Ivy_ObjIsNode(pObj) ) + continue; + Ivy_ObjSetNodeHashNext( pObj, NULL ); + if ( Ivy_ObjClassNodeRepr(pObj) == NULL ) + { + assert( Ivy_ObjClassNodeNext(pObj) == NULL ); + continue; + } + // recognize the head of the class + if ( Ivy_ObjClassNodeNext( Ivy_ObjClassNodeRepr(pObj) ) != NULL ) + continue; + // clean the class representative and add it to the list + Ivy_ObjSetClassNodeRepr( pObj, NULL ); + Ivy_FraigAddClass( &p->lClasses, pObj ); + } + // free the table + free( pTable ); +} + +/**Function************************************************************* + + Synopsis [Recursively refines the class after simulation.] + + Description [Returns 1 if the class has changed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigRefineClass_rec( Ivy_FraigMan_t * p, Ivy_Obj_t * pClass ) +{ + Ivy_Obj_t * pClassNew, * pListOld, * pListNew, * pNode; + int RetValue = 0; + // check if there is refinement + pListOld = pClass; + Ivy_FraigForEachClassNode( Ivy_ObjClassNodeNext(pClass), pClassNew ) + { + if ( !Ivy_NodeCompareSims(p, pClass, pClassNew) ) + { + if ( p->pParams->fPatScores ) + Ivy_FraigAddToPatScores( p, pClass, pClassNew ); + break; + } + pListOld = pClassNew; + } + if ( pClassNew == NULL ) + return 0; + // set representative of the new class + Ivy_ObjSetClassNodeRepr( pClassNew, NULL ); + // start the new list + pListNew = pClassNew; + // go through the remaining nodes and sort them into two groups: + // (1) matches of the old node; (2) non-matches of the old node + Ivy_FraigForEachClassNode( Ivy_ObjClassNodeNext(pClassNew), pNode ) + if ( Ivy_NodeCompareSims( p, pClass, pNode ) ) + { + Ivy_ObjSetClassNodeNext( pListOld, pNode ); + pListOld = pNode; + } + else + { + Ivy_ObjSetClassNodeNext( pListNew, pNode ); + Ivy_ObjSetClassNodeRepr( pNode, pClassNew ); + pListNew = pNode; + } + // finish both lists + Ivy_ObjSetClassNodeNext( pListNew, NULL ); + Ivy_ObjSetClassNodeNext( pListOld, NULL ); + // update the list of classes + Ivy_FraigInsertClass( &p->lClasses, pClass, pClassNew ); + // if the old class is trivial, remove it + if ( Ivy_ObjClassNodeNext(pClass) == NULL ) + Ivy_FraigRemoveClass( &p->lClasses, pClass ); + // if the new class is trivial, remove it; otherwise, try to refine it + if ( Ivy_ObjClassNodeNext(pClassNew) == NULL ) + Ivy_FraigRemoveClass( &p->lClasses, pClassNew ); + else + RetValue = Ivy_FraigRefineClass_rec( p, pClassNew ); + return RetValue + 1; +} + +/**Function************************************************************* + + Synopsis [Creates the counter-example from the successful pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigCheckOutputSimsSavePattern( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_FraigSim_t * pSims; + int i, k, BestPat, * pModel; + // find the word of the pattern + pSims = Ivy_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + if ( pSims->pData[i] ) + break; + assert( i < p->nSimWords ); + // find the bit of the pattern + for ( k = 0; k < 32; k++ ) + if ( pSims->pData[i] & (1 << k) ) + break; + assert( k < 32 ); + // determine the best pattern + BestPat = i * 32 + k; + // fill in the counter-example data + pModel = ALLOC( int, Ivy_ManPiNum(p->pManFraig) ); + Ivy_ManForEachPi( p->pManAig, pObj, i ) + { + pModel[i] = Ivy_InfoHasBit(Ivy_ObjSim(pObj)->pData, BestPat); +// printf( "%d", pModel[i] ); + } +// printf( "\n" ); + // set the model + assert( p->pManFraig->pData == NULL ); + p->pManFraig->pData = pModel; + return; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the one of the output is already non-constant 0.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigCheckOutputSims( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + // make sure the reference simulation pattern does not detect the bug + pObj = Ivy_ManPo( p->pManAig, 0 ); + assert( Ivy_ObjFanin0(pObj)->fPhase == (unsigned)Ivy_ObjFaninC0(pObj) ); // Ivy_ObjFaninPhase(Ivy_ObjChild0(pObj)) == 0 + Ivy_ManForEachPo( p->pManAig, pObj, i ) + { + // complement simulation info +// if ( Ivy_ObjFanin0(pObj)->fPhase ^ Ivy_ObjFaninC0(pObj) ) // Ivy_ObjFaninPhase(Ivy_ObjChild0(pObj)) +// Ivy_NodeComplementSim( p, Ivy_ObjFanin0(pObj) ); + // check + if ( !Ivy_NodeHasZeroSim( p, Ivy_ObjFanin0(pObj) ) ) + { + // create the counter-example from this pattern + Ivy_FraigCheckOutputSimsSavePattern( p, Ivy_ObjFanin0(pObj) ); + return 1; + } + // complement simulation info +// if ( Ivy_ObjFanin0(pObj)->fPhase ^ Ivy_ObjFaninC0(pObj) ) +// Ivy_NodeComplementSim( p, Ivy_ObjFanin0(pObj) ); + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Refines the classes after simulation.] + + Description [Assumes that simulation info is assigned. Returns the + number of classes refined.] + + SideEffects [Large equivalence class of constant 0 may cause problems.] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigRefineClasses( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pClass, * pClass2; + int clk, RetValue, Counter = 0; + // check if some outputs already became non-constant + // this is a special case when computation can be stopped!!! + if ( p->pParams->fProve ) + Ivy_FraigCheckOutputSims( p ); + if ( p->pManFraig->pData ) + return 0; + // refine the classed +clk = clock(); + Ivy_FraigForEachEquivClassSafe( p->lClasses.pHead, pClass, pClass2 ) + { + if ( pClass->fMarkA ) + continue; + RetValue = Ivy_FraigRefineClass_rec( p, pClass ); + Counter += ( RetValue > 0 ); +//if ( Ivy_ObjIsConst1(pClass) ) +//printf( "%d ", RetValue ); +//if ( Ivy_ObjIsConst1(pClass) ) +// p->time1 += clock() - clk; + } +p->timeRef += clock() - clk; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Print the class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigPrintClass( Ivy_Obj_t * pClass ) +{ + Ivy_Obj_t * pObj; + printf( "Class {" ); + Ivy_FraigForEachClassNode( pClass, pObj ) + printf( " %d(%d)%c", pObj->Id, pObj->Level, pObj->fPhase? '+' : '-' ); + printf( " }\n" ); +} + +/**Function************************************************************* + + Synopsis [Count the number of elements in the class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigCountClassNodes( Ivy_Obj_t * pClass ) +{ + Ivy_Obj_t * pObj; + int Counter = 0; + Ivy_FraigForEachClassNode( pClass, pObj ) + Counter++; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Prints simulation classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigPrintSimClasses( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pClass; + Ivy_FraigForEachEquivClass( p->lClasses.pHead, pClass ) + { +// Ivy_FraigPrintClass( pClass ); + printf( "%d ", Ivy_FraigCountClassNodes( pClass ) ); + } +// printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Generated const 0 pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSavePattern0( Ivy_FraigMan_t * p ) +{ + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); +} + +/**Function************************************************************* + + Synopsis [[Generated const 1 pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSavePattern1( Ivy_FraigMan_t * p ) +{ + memset( p->pPatWords, 0xff, sizeof(unsigned) * p->nPatWords ); +} + +/**Function************************************************************* + + Synopsis [Generates the counter-example satisfying the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int * Ivy_FraigCreateModel( Ivy_FraigMan_t * p ) +{ + int * pModel; + Ivy_Obj_t * pObj; + int i; + pModel = ALLOC( int, Ivy_ManPiNum(p->pManFraig) ); + Ivy_ManForEachPi( p->pManFraig, pObj, i ) + pModel[i] = ( p->pSat->model.ptr[Ivy_ObjSatNum(pObj)] == l_True ); + return pModel; +} + +/**Function************************************************************* + + Synopsis [Copy pattern from the solver into the internal storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSavePattern( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); + Ivy_ManForEachPi( p->pManFraig, pObj, i ) +// Vec_PtrForEachEntry( p->vPiVars, pObj, i ) + if ( p->pSat->model.ptr[Ivy_ObjSatNum(pObj)] == l_True ) + Ivy_InfoSetBit( p->pPatWords, i ); +// Ivy_InfoSetBit( p->pPatWords, pObj->Id - 1 ); +} + +/**Function************************************************************* + + Synopsis [Copy pattern from the solver into the internal storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSavePattern2( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); +// Ivy_ManForEachPi( p->pManFraig, pObj, i ) + Vec_PtrForEachEntry( p->vPiVars, pObj, i ) + if ( p->pSat->model.ptr[Ivy_ObjSatNum(pObj)] == l_True ) +// Ivy_InfoSetBit( p->pPatWords, i ); + Ivy_InfoSetBit( p->pPatWords, pObj->Id - 1 ); +} + +/**Function************************************************************* + + Synopsis [Copy pattern from the solver into the internal storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSavePattern3( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + for ( i = 0; i < p->nPatWords; i++ ) + p->pPatWords[i] = Ivy_ObjRandomSim(); + Vec_PtrForEachEntry( p->vPiVars, pObj, i ) + if ( Ivy_InfoHasBit( p->pPatWords, pObj->Id - 1 ) ^ (p->pSat->model.ptr[Ivy_ObjSatNum(pObj)] == l_True) ) + Ivy_InfoXorBit( p->pPatWords, pObj->Id - 1 ); +} + + +/**Function************************************************************* + + Synopsis [Performs simulation of the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSimulate( Ivy_FraigMan_t * p ) +{ + int nChanges, nClasses; + // start the classes + Ivy_FraigAssignRandom( p ); + Ivy_FraigSimulateOne( p ); + Ivy_FraigCreateClasses( p ); +//printf( "Starting classes = %5d. Pairs = %6d.\n", p->lClasses.nItems, Ivy_FraigCountPairsClasses(p) ); + // refine classes by walking 0/1 patterns + Ivy_FraigSavePattern0( p ); + Ivy_FraigAssignDist1( p, p->pPatWords ); + Ivy_FraigSimulateOne( p ); + nChanges = Ivy_FraigRefineClasses( p ); + if ( p->pManFraig->pData ) + return; +//printf( "Refined classes = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Ivy_FraigCountPairsClasses(p) ); + Ivy_FraigSavePattern1( p ); + Ivy_FraigAssignDist1( p, p->pPatWords ); + Ivy_FraigSimulateOne( p ); + nChanges = Ivy_FraigRefineClasses( p ); + if ( p->pManFraig->pData ) + return; +//printf( "Refined classes = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Ivy_FraigCountPairsClasses(p) ); + // refine classes by random simulation + do { + Ivy_FraigAssignRandom( p ); + Ivy_FraigSimulateOne( p ); + nClasses = p->lClasses.nItems; + nChanges = Ivy_FraigRefineClasses( p ); + if ( p->pManFraig->pData ) + return; +//printf( "Refined classes = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Ivy_FraigCountPairsClasses(p) ); + } while ( (double)nChanges / nClasses > p->pParams->dSimSatur ); +// Ivy_FraigPrintSimClasses( p ); +} + + + +/**Function************************************************************* + + Synopsis [Cleans pattern scores.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigCleanPatScores( Ivy_FraigMan_t * p ) +{ + int i, nLimit = p->nSimWords * 32; + for ( i = 0; i < nLimit; i++ ) + p->pPatScores[i] = 0; +} + +/**Function************************************************************* + + Synopsis [Adds to pattern scores.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigAddToPatScores( Ivy_FraigMan_t * p, Ivy_Obj_t * pClass, Ivy_Obj_t * pClassNew ) +{ + Ivy_FraigSim_t * pSims0, * pSims1; + unsigned uDiff; + int i, w; + // get hold of the simulation information + pSims0 = Ivy_ObjSim(pClass); + pSims1 = Ivy_ObjSim(pClassNew); + // iterate through the differences and record the score + for ( w = 0; w < p->nSimWords; w++ ) + { + uDiff = pSims0->pData[w] ^ pSims1->pData[w]; + if ( uDiff == 0 ) + continue; + for ( i = 0; i < 32; i++ ) + if ( uDiff & ( 1 << i ) ) + p->pPatScores[w*32+i]++; + } +} + +/**Function************************************************************* + + Synopsis [Selects the best pattern.] + + Description [Returns 1 if such pattern is found.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigSelectBestPat( Ivy_FraigMan_t * p ) +{ + Ivy_FraigSim_t * pSims; + Ivy_Obj_t * pObj; + int i, nLimit = p->nSimWords * 32, MaxScore = 0, BestPat = -1; + for ( i = 1; i < nLimit; i++ ) + { + if ( MaxScore < p->pPatScores[i] ) + { + MaxScore = p->pPatScores[i]; + BestPat = i; + } + } + if ( MaxScore == 0 ) + return 0; +// if ( MaxScore > p->pParams->MaxScore ) +// printf( "Max score is %3d. ", MaxScore ); + // copy the best pattern into the selected pattern + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); + Ivy_ManForEachPi( p->pManAig, pObj, i ) + { + pSims = Ivy_ObjSim(pObj); + if ( Ivy_InfoHasBit(pSims->pData, BestPat) ) + Ivy_InfoSetBit(p->pPatWords, i); + } + return MaxScore; +} + +/**Function************************************************************* + + Synopsis [Resimulates fraiging manager after finding a counter-example.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigResimulate( Ivy_FraigMan_t * p ) +{ + int nChanges; + Ivy_FraigAssignDist1( p, p->pPatWords ); + Ivy_FraigSimulateOne( p ); + if ( p->pParams->fPatScores ) + Ivy_FraigCleanPatScores( p ); + nChanges = Ivy_FraigRefineClasses( p ); + if ( p->pManFraig->pData ) + return; + if ( nChanges < 1 ) + printf( "Error: A counter-example did not refine classes!\n" ); + assert( nChanges >= 1 ); +//printf( "Refined classes! = %5d. Changes = %4d.\n", p->lClasses.nItems, nChanges ); + if ( !p->pParams->fPatScores ) + return; + + // perform additional simulation using dist1 patterns derived from successful patterns + while ( Ivy_FraigSelectBestPat(p) > p->pParams->MaxScore ) + { + Ivy_FraigAssignDist1( p, p->pPatWords ); + Ivy_FraigSimulateOne( p ); + Ivy_FraigCleanPatScores( p ); + nChanges = Ivy_FraigRefineClasses( p ); + if ( p->pManFraig->pData ) + return; +//printf( "Refined class!!! = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Ivy_FraigCountPairsClasses(p) ); + if ( nChanges == 0 ) + break; + } +} + + +/**Function************************************************************* + + Synopsis [Prints the status of the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigMiterPrint( Ivy_Man_t * pNtk, char * pString, int clk, int fVerbose ) +{ + if ( !fVerbose ) + return; + printf( "Nodes = %7d. Levels = %4d. ", Ivy_ManNodeNum(pNtk), Ivy_ManLevels(pNtk) ); + PRT( pString, clock() - clk ); +} + +/**Function************************************************************* + + Synopsis [Reports the status of the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigMiterStatus( Ivy_Man_t * pMan ) +{ + Ivy_Obj_t * pObj, * pObjNew; + int i, CountConst0 = 0, CountNonConst0 = 0, CountUndecided = 0; + if ( pMan->pData ) + return 0; + Ivy_ManForEachPo( pMan, pObj, i ) + { + pObjNew = Ivy_ObjChild0(pObj); + // check if the output is constant 1 + if ( pObjNew == pMan->pConst1 ) + { + CountNonConst0++; + continue; + } + // check if the output is constant 0 + if ( pObjNew == Ivy_Not(pMan->pConst1) ) + { + CountConst0++; + continue; + } + // check if the output can be constant 0 + if ( Ivy_Regular(pObjNew)->fPhase != (unsigned)Ivy_IsComplement(pObjNew) ) + { + CountNonConst0++; + continue; + } + CountUndecided++; + } +/* + if ( p->pParams->fVerbose ) + { + printf( "Miter has %d outputs. ", Ivy_ManPoNum(p->pManAig) ); + printf( "Const0 = %d. ", CountConst0 ); + printf( "NonConst0 = %d. ", CountNonConst0 ); + printf( "Undecided = %d. ", CountUndecided ); + printf( "\n" ); + } +*/ + if ( CountNonConst0 ) + return 0; + if ( CountUndecided ) + return -1; + return 1; +} + +/**Function************************************************************* + + Synopsis [Tries to prove each output of the miter until encountering a sat output.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigMiterProve( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj, * pObjNew; + int i, RetValue, clk = clock(); + int fVerbose = 0; + Ivy_ManForEachPo( p->pManAig, pObj, i ) + { + if ( i && fVerbose ) + { + PRT( "Time", clock() -clk ); + } + pObjNew = Ivy_ObjChild0Equiv(pObj); + // check if the output is constant 1 + if ( pObjNew == p->pManFraig->pConst1 ) + { + if ( fVerbose ) + printf( "Output %2d (out of %2d) is constant 1. ", i, Ivy_ManPoNum(p->pManAig) ); + // assing constant 0 model + p->pManFraig->pData = ALLOC( int, Ivy_ManPiNum(p->pManFraig) ); + memset( p->pManFraig->pData, 0, sizeof(int) * Ivy_ManPiNum(p->pManFraig) ); + break; + } + // check if the output is constant 0 + if ( pObjNew == Ivy_Not(p->pManFraig->pConst1) ) + { + if ( fVerbose ) + printf( "Output %2d (out of %2d) is already constant 0. ", i, Ivy_ManPoNum(p->pManAig) ); + continue; + } + // check if the output can be constant 0 + if ( Ivy_Regular(pObjNew)->fPhase != (unsigned)Ivy_IsComplement(pObjNew) ) + { + if ( fVerbose ) + printf( "Output %2d (out of %2d) cannot be constant 0. ", i, Ivy_ManPoNum(p->pManAig) ); + // assing constant 0 model + p->pManFraig->pData = ALLOC( int, Ivy_ManPiNum(p->pManFraig) ); + memset( p->pManFraig->pData, 0, sizeof(int) * Ivy_ManPiNum(p->pManFraig) ); + break; + } +/* + // check the representative of this node + pRepr = Ivy_ObjClassNodeRepr(Ivy_ObjFanin0(pObj)); + if ( Ivy_Regular(pRepr) != p->pManAig->pConst1 ) + printf( "Representative is not constant 1.\n" ); + else + printf( "Representative is constant 1.\n" ); +*/ + // try to prove the output constant 0 + RetValue = Ivy_FraigNodeIsConst( p, Ivy_Regular(pObjNew) ); + if ( RetValue == 1 ) // proved equivalent + { + if ( fVerbose ) + printf( "Output %2d (out of %2d) was proved constant 0. ", i, Ivy_ManPoNum(p->pManAig) ); + // set the constant miter + Ivy_ObjFanin0(pObj)->pEquiv = Ivy_NotCond( p->pManFraig->pConst1, !Ivy_ObjFaninC0(pObj) ); + continue; + } + if ( RetValue == -1 ) // failed + { + if ( fVerbose ) + printf( "Output %2d (out of %2d) has timed out at %d backtracks. ", i, Ivy_ManPoNum(p->pManAig), p->pParams->nBTLimitMiter ); + continue; + } + // proved satisfiable + if ( fVerbose ) + printf( "Output %2d (out of %2d) was proved NOT a constant 0. ", i, Ivy_ManPoNum(p->pManAig) ); + // create the model + p->pManFraig->pData = Ivy_FraigCreateModel(p); + break; + } + if ( fVerbose ) + { + PRT( "Time", clock() -clk ); + } +} + +/**Function************************************************************* + + Synopsis [Performs fraiging for the internal nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigSweep( Ivy_FraigMan_t * p ) +{ + Ivy_Obj_t * pObj;//, * pTemp; + int i, k = 0; +p->nClassesZero = p->lClasses.pHead? (Ivy_ObjIsConst1(p->lClasses.pHead) ? Ivy_FraigCountClassNodes(p->lClasses.pHead) : 0) : 0; +p->nClassesBeg = p->lClasses.nItems; + // duplicate internal nodes + p->pProgress = Extra_ProgressBarStart( stdout, Ivy_ManNodeNum(p->pManAig) ); + Ivy_ManForEachNode( p->pManAig, pObj, i ) + { + Extra_ProgressBarUpdate( p->pProgress, k++, NULL ); + // default to simple strashing if simulation detected a counter-example for a PO + if ( p->pManFraig->pData ) + pObj->pEquiv = Ivy_And( p->pManFraig, Ivy_ObjChild0Equiv(pObj), Ivy_ObjChild1Equiv(pObj) ); + else + pObj->pEquiv = Ivy_FraigAnd( p, pObj ); + assert( pObj->pEquiv != NULL ); +// pTemp = Ivy_Regular(pObj->pEquiv); +// assert( Ivy_Regular(pObj->pEquiv)->Type ); + } + Extra_ProgressBarStop( p->pProgress ); +p->nClassesEnd = p->lClasses.nItems; + // try to prove the outputs of the miter + p->nNodesMiter = Ivy_ManNodeNum(p->pManFraig); +// Ivy_FraigMiterStatus( p->pManFraig ); + if ( p->pParams->fProve && p->pManFraig->pData == NULL ) + Ivy_FraigMiterProve( p ); + // add the POs + Ivy_ManForEachPo( p->pManAig, pObj, i ) + Ivy_ObjCreatePo( p->pManFraig, Ivy_ObjChild0Equiv(pObj) ); + // clean the old manager + Ivy_ManForEachObj( p->pManAig, pObj, i ) + pObj->pFanout = pObj->pNextFan0 = pObj->pNextFan1 = pObj->pPrevFan0 = pObj->pPrevFan1 = NULL; + // clean the new manager + Ivy_ManForEachObj( p->pManFraig, pObj, i ) + { + if ( Ivy_ObjFaninVec(pObj) ) + Vec_PtrFree( Ivy_ObjFaninVec(pObj) ); + pObj->pNextFan0 = pObj->pNextFan1 = NULL; + } + // remove dangling nodes + Ivy_ManCleanup( p->pManFraig ); + // clean up the class marks + Ivy_FraigForEachEquivClass( p->lClasses.pHead, pObj ) + pObj->fMarkA = 0; +} + +/**Function************************************************************* + + Synopsis [Performs fraiging for one node.] + + Description [Returns the fraiged node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_FraigAnd( Ivy_FraigMan_t * p, Ivy_Obj_t * pObjOld ) +{ + Ivy_Obj_t * pObjNew, * pFanin0New, * pFanin1New, * pObjReprNew; + int RetValue; + // get the fraiged fanins + pFanin0New = Ivy_ObjChild0Equiv(pObjOld); + pFanin1New = Ivy_ObjChild1Equiv(pObjOld); + // get the candidate fraig node + pObjNew = Ivy_And( p->pManFraig, pFanin0New, pFanin1New ); + // get representative of this class + if ( Ivy_ObjClassNodeRepr(pObjOld) == NULL || // this is a unique node + (!p->pParams->fDoSparse && Ivy_ObjClassNodeRepr(pObjOld) == p->pManAig->pConst1) ) // this is a sparse node + { + assert( Ivy_Regular(pFanin0New) != Ivy_Regular(pFanin1New) ); + assert( pObjNew != Ivy_Regular(pFanin0New) ); + assert( pObjNew != Ivy_Regular(pFanin1New) ); + return pObjNew; + } + // get the fraiged representative + pObjReprNew = Ivy_ObjFraig(Ivy_ObjClassNodeRepr(pObjOld)); + // if the fraiged nodes are the same return + if ( Ivy_Regular(pObjNew) == Ivy_Regular(pObjReprNew) ) + return pObjNew; + assert( Ivy_Regular(pObjNew) != Ivy_ManConst1(p->pManFraig) ); +// printf( "Node = %d. Repr = %d.\n", pObjOld->Id, Ivy_ObjClassNodeRepr(pObjOld)->Id ); + + // they are different (the counter-example is in p->pPatWords) + RetValue = Ivy_FraigNodesAreEquiv( p, Ivy_Regular(pObjReprNew), Ivy_Regular(pObjNew) ); + if ( RetValue == 1 ) // proved equivalent + { + // mark the class as proved + if ( Ivy_ObjClassNodeNext(pObjOld) == NULL ) + Ivy_ObjClassNodeRepr(pObjOld)->fMarkA = 1; + return Ivy_NotCond( pObjReprNew, pObjOld->fPhase ^ Ivy_ObjClassNodeRepr(pObjOld)->fPhase ); + } + if ( RetValue == -1 ) // failed + return pObjNew; + // simulate the counter-example and return the new node + Ivy_FraigResimulate( p ); + return pObjNew; +} + +/**Function************************************************************* + + Synopsis [Prints variable activity.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigPrintActivity( Ivy_FraigMan_t * p ) +{ + int i; + for ( i = 0; i < p->nSatVars; i++ ) + printf( "%d %.3f ", i, p->pSat->activity[i] ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Runs equivalence test for the two nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigNodesAreEquiv( Ivy_FraigMan_t * p, Ivy_Obj_t * pOld, Ivy_Obj_t * pNew ) +{ + int pLits[4], RetValue, RetValue1, nBTLimit, clk, clk2 = clock(); + + // make sure the nodes are not complemented + assert( !Ivy_IsComplement(pNew) ); + assert( !Ivy_IsComplement(pOld) ); + assert( pNew != pOld ); + + // if at least one of the nodes is a failed node, perform adjustments: + // if the backtrack limit is small, simply skip this node + // if the backtrack limit is > 10, take the quare root of the limit + nBTLimit = p->pParams->nBTLimitNode; + if ( nBTLimit > 0 && (pOld->fFailTfo || pNew->fFailTfo) ) + { + p->nSatFails++; + // fail immediately +// return -1; + if ( nBTLimit <= 10 ) + return -1; + nBTLimit = (int)pow(nBTLimit, 0.7); + } + p->nSatCalls++; + + // make sure the solver is allocated and has enough variables + if ( p->pSat == NULL ) + { + p->pSat = sat_solver_new(); + p->nSatVars = 1; + sat_solver_setnvars( p->pSat, 1000 ); + // var 0 is reserved for const1 node - add the clause +// pLits[0] = toLit( 0 ); +// sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + } + + // if the nodes do not have SAT variables, allocate them + Ivy_FraigNodeAddToSolver( p, pOld, pNew ); + + // prepare variable activity + Ivy_FraigSetActivityFactors( p, pOld, pNew ); + + // solve under assumptions + // A = 1; B = 0 OR A = 1; B = 1 +clk = clock(); + pLits[0] = toLitCond( Ivy_ObjSatNum(pOld), 0 ); + pLits[1] = toLitCond( Ivy_ObjSatNum(pNew), pOld->fPhase == pNew->fPhase ); +//Sat_SolverWriteDimacs( p->pSat, "temp.cnf", pLits, pLits + 2, 1 ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 2, + (sint64)nBTLimit, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + pLits[1] = lit_neg( pLits[1] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + // continue solving the other implication + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + Ivy_FraigSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + if ( pOld != p->pManFraig->pConst1 ) + pOld->fFailTfo = 1; + pNew->fFailTfo = 1; + p->nSatFailsReal++; + return -1; + } + + // if the old node was constant 0, we already know the answer + if ( pOld == p->pManFraig->pConst1 ) + { + p->nSatProof++; + return 1; + } + + // solve under assumptions + // A = 0; B = 1 OR A = 0; B = 0 +clk = clock(); + pLits[0] = toLitCond( Ivy_ObjSatNum(pOld), 1 ); + pLits[1] = toLitCond( Ivy_ObjSatNum(pNew), pOld->fPhase ^ pNew->fPhase ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 2, + (sint64)nBTLimit, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + pLits[1] = lit_neg( pLits[1] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + Ivy_FraigSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + pOld->fFailTfo = 1; + pNew->fFailTfo = 1; + p->nSatFailsReal++; + return -1; + } +/* + // check BDD proof + { + int RetVal; + PRT( "Sat", clock() - clk2 ); + clk2 = clock(); + RetVal = Ivy_FraigNodesAreEquivBdd( pOld, pNew ); +// printf( "%d ", RetVal ); + assert( RetVal ); + PRT( "Bdd", clock() - clk2 ); + printf( "\n" ); + } +*/ + // return SAT proof + p->nSatProof++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Runs equivalence test for one node.] + + Description [Returns the fraiged node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigNodeIsConst( Ivy_FraigMan_t * p, Ivy_Obj_t * pNew ) +{ + int pLits[2], RetValue1, RetValue, clk; + + // make sure the nodes are not complemented + assert( !Ivy_IsComplement(pNew) ); + assert( pNew != p->pManFraig->pConst1 ); + p->nSatCalls++; + + // make sure the solver is allocated and has enough variables + if ( p->pSat == NULL ) + { + p->pSat = sat_solver_new(); + p->nSatVars = 1; + sat_solver_setnvars( p->pSat, 1000 ); + // var 0 is reserved for const1 node - add the clause +// pLits[0] = toLit( 0 ); +// sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + } + + // if the nodes do not have SAT variables, allocate them + Ivy_FraigNodeAddToSolver( p, NULL, pNew ); + + // prepare variable activity + Ivy_FraigSetActivityFactors( p, NULL, pNew ); + + // solve under assumptions +clk = clock(); + pLits[0] = toLitCond( Ivy_ObjSatNum(pNew), pNew->fPhase ); + RetValue1 = sat_solver_solve( p->pSat, pLits, pLits + 1, + (sint64)p->pParams->nBTLimitMiter, (sint64)0, + p->nBTLimitGlobal, p->nInsLimitGlobal ); +p->timeSat += clock() - clk; + if ( RetValue1 == l_False ) + { +p->timeSatUnsat += clock() - clk; + pLits[0] = lit_neg( pLits[0] ); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 1 ); + assert( RetValue ); + // continue solving the other implication + p->nSatCallsUnsat++; + } + else if ( RetValue1 == l_True ) + { +p->timeSatSat += clock() - clk; + if ( p->pPatWords ) + Ivy_FraigSavePattern( p ); + p->nSatCallsSat++; + return 0; + } + else // if ( RetValue1 == l_Undef ) + { +p->timeSatFail += clock() - clk; + // mark the node as the failed node + pNew->fFailTfo = 1; + p->nSatFailsReal++; + return -1; + } + + // return SAT proof + p->nSatProof++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Addes clauses to the solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigAddClausesMux( Ivy_FraigMan_t * p, Ivy_Obj_t * pNode ) +{ + Ivy_Obj_t * pNodeI, * pNodeT, * pNodeE; + int pLits[4], RetValue, VarF, VarI, VarT, VarE, fCompT, fCompE; + + assert( !Ivy_IsComplement( pNode ) ); + assert( Ivy_ObjIsMuxType( pNode ) ); + // get nodes (I = if, T = then, E = else) + pNodeI = Ivy_ObjRecognizeMux( pNode, &pNodeT, &pNodeE ); + // get the variable numbers + VarF = Ivy_ObjSatNum(pNode); + VarI = Ivy_ObjSatNum(pNodeI); + VarT = Ivy_ObjSatNum(Ivy_Regular(pNodeT)); + VarE = Ivy_ObjSatNum(Ivy_Regular(pNodeE)); + // get the complementation flags + fCompT = Ivy_IsComplement(pNodeT); + fCompE = Ivy_IsComplement(pNodeE); + + // f = ITE(i, t, e) + + // i' + t' + f + // i' + t + f' + // i + e' + f + // i + e + f' + + // create four clauses + pLits[0] = toLitCond(VarI, 1); + pLits[1] = toLitCond(VarT, 1^fCompT); + pLits[2] = toLitCond(VarF, 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarI, 1); + pLits[1] = toLitCond(VarT, 0^fCompT); + pLits[2] = toLitCond(VarF, 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarI, 0); + pLits[1] = toLitCond(VarE, 1^fCompE); + pLits[2] = toLitCond(VarF, 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarI, 0); + pLits[1] = toLitCond(VarE, 0^fCompE); + pLits[2] = toLitCond(VarF, 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + + // two additional clauses + // t' & e' -> f' + // t & e -> f + + // t + e + f' + // t' + e' + f + + if ( VarT == VarE ) + { +// assert( fCompT == !fCompE ); + return; + } + + pLits[0] = toLitCond(VarT, 0^fCompT); + pLits[1] = toLitCond(VarE, 0^fCompE); + pLits[2] = toLitCond(VarF, 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); + pLits[0] = toLitCond(VarT, 1^fCompT); + pLits[1] = toLitCond(VarE, 1^fCompE); + pLits[2] = toLitCond(VarF, 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 ); + assert( RetValue ); +} + +/**Function************************************************************* + + Synopsis [Addes clauses to the solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigAddClausesSuper( Ivy_FraigMan_t * p, Ivy_Obj_t * pNode, Vec_Ptr_t * vSuper ) +{ + Ivy_Obj_t * pFanin; + int * pLits, nLits, RetValue, i; + assert( !Ivy_IsComplement(pNode) ); + assert( Ivy_ObjIsNode( pNode ) ); + // create storage for literals + nLits = Vec_PtrSize(vSuper) + 1; + pLits = ALLOC( int, nLits ); + // suppose AND-gate is A & B = C + // add !A => !C or A + !C + Vec_PtrForEachEntry( vSuper, pFanin, i ) + { + pLits[0] = toLitCond(Ivy_ObjSatNum(Ivy_Regular(pFanin)), Ivy_IsComplement(pFanin)); + pLits[1] = toLitCond(Ivy_ObjSatNum(pNode), 1); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 2 ); + assert( RetValue ); + } + // add A & B => C or !A + !B + C + Vec_PtrForEachEntry( vSuper, pFanin, i ) + pLits[i] = toLitCond(Ivy_ObjSatNum(Ivy_Regular(pFanin)), !Ivy_IsComplement(pFanin)); + pLits[nLits-1] = toLitCond(Ivy_ObjSatNum(pNode), 0); + RetValue = sat_solver_addclause( p->pSat, pLits, pLits + nLits ); + assert( RetValue ); + free( pLits ); +} + +/**Function************************************************************* + + Synopsis [Collects the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigCollectSuper_rec( Ivy_Obj_t * pObj, Vec_Ptr_t * vSuper, int fFirst, int fUseMuxes ) +{ + // if the new node is complemented or a PI, another gate begins + if ( Ivy_IsComplement(pObj) || Ivy_ObjIsPi(pObj) || (!fFirst && Ivy_ObjRefs(pObj) > 1) || + (fUseMuxes && Ivy_ObjIsMuxType(pObj)) ) + { + Vec_PtrPushUnique( vSuper, pObj ); + return; + } + // go through the branches + Ivy_FraigCollectSuper_rec( Ivy_ObjChild0(pObj), vSuper, 0, fUseMuxes ); + Ivy_FraigCollectSuper_rec( Ivy_ObjChild1(pObj), vSuper, 0, fUseMuxes ); +} + +/**Function************************************************************* + + Synopsis [Collects the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Ivy_FraigCollectSuper( Ivy_Obj_t * pObj, int fUseMuxes ) +{ + Vec_Ptr_t * vSuper; + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_ObjIsPi(pObj) ); + vSuper = Vec_PtrAlloc( 4 ); + Ivy_FraigCollectSuper_rec( pObj, vSuper, 1, fUseMuxes ); + return vSuper; +} + +/**Function************************************************************* + + Synopsis [Updates the solver clause database.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigObjAddToFrontier( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj, Vec_Ptr_t * vFrontier ) +{ + assert( !Ivy_IsComplement(pObj) ); + if ( Ivy_ObjSatNum(pObj) ) + return; + assert( Ivy_ObjSatNum(pObj) == 0 ); + assert( Ivy_ObjFaninVec(pObj) == NULL ); + if ( Ivy_ObjIsConst1(pObj) ) + return; +//printf( "Assigning node %d number %d\n", pObj->Id, p->nSatVars ); + Ivy_ObjSetSatNum( pObj, p->nSatVars++ ); + if ( Ivy_ObjIsNode(pObj) ) + Vec_PtrPush( vFrontier, pObj ); +} + +/**Function************************************************************* + + Synopsis [Updates the solver clause database.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_FraigNodeAddToSolver( Ivy_FraigMan_t * p, Ivy_Obj_t * pOld, Ivy_Obj_t * pNew ) +{ + Vec_Ptr_t * vFrontier, * vFanins; + Ivy_Obj_t * pNode, * pFanin; + int i, k, fUseMuxes = 1; + assert( pOld || pNew ); + // quit if CNF is ready + if ( (!pOld || Ivy_ObjFaninVec(pOld)) && (!pNew || Ivy_ObjFaninVec(pNew)) ) + return; + // start the frontier + vFrontier = Vec_PtrAlloc( 100 ); + if ( pOld ) Ivy_FraigObjAddToFrontier( p, pOld, vFrontier ); + if ( pNew ) Ivy_FraigObjAddToFrontier( p, pNew, vFrontier ); + // explore nodes in the frontier + Vec_PtrForEachEntry( vFrontier, pNode, i ) + { + // create the supergate + assert( Ivy_ObjSatNum(pNode) ); + assert( Ivy_ObjFaninVec(pNode) == NULL ); + if ( fUseMuxes && Ivy_ObjIsMuxType(pNode) ) + { + vFanins = Vec_PtrAlloc( 4 ); + Vec_PtrPushUnique( vFanins, Ivy_ObjFanin0( Ivy_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( vFanins, Ivy_ObjFanin0( Ivy_ObjFanin1(pNode) ) ); + Vec_PtrPushUnique( vFanins, Ivy_ObjFanin1( Ivy_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( vFanins, Ivy_ObjFanin1( Ivy_ObjFanin1(pNode) ) ); + Vec_PtrForEachEntry( vFanins, pFanin, k ) + Ivy_FraigObjAddToFrontier( p, Ivy_Regular(pFanin), vFrontier ); + Ivy_FraigAddClausesMux( p, pNode ); + } + else + { + vFanins = Ivy_FraigCollectSuper( pNode, fUseMuxes ); + Vec_PtrForEachEntry( vFanins, pFanin, k ) + Ivy_FraigObjAddToFrontier( p, Ivy_Regular(pFanin), vFrontier ); + Ivy_FraigAddClausesSuper( p, pNode, vFanins ); + } + assert( Vec_PtrSize(vFanins) > 1 ); + Ivy_ObjSetFaninVec( pNode, vFanins ); + } + Vec_PtrFree( vFrontier ); +} + +/**Function************************************************************* + + Synopsis [Sets variable activities in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigSetActivityFactors_rec( Ivy_FraigMan_t * p, Ivy_Obj_t * pObj, int LevelMin, int LevelMax ) +{ + Vec_Ptr_t * vFanins; + Ivy_Obj_t * pFanin; + int i, Counter = 0; + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjSatNum(pObj) ); + // skip visited variables + if ( Ivy_ObjIsTravIdCurrent(p->pManFraig, pObj) ) + return 0; + Ivy_ObjSetTravIdCurrent(p->pManFraig, pObj); + // add the PI to the list + if ( pObj->Level <= (unsigned)LevelMin || Ivy_ObjIsPi(pObj) ) + return 0; + // set the factor of this variable + // (LevelMax-LevelMin) / (pObj->Level-LevelMin) = p->pParams->dActConeBumpMax / ThisBump + p->pSat->factors[Ivy_ObjSatNum(pObj)] = p->pParams->dActConeBumpMax * (pObj->Level - LevelMin)/(LevelMax - LevelMin); + veci_push(&p->pSat->act_vars, Ivy_ObjSatNum(pObj)); + // explore the fanins + vFanins = Ivy_ObjFaninVec( pObj ); + Vec_PtrForEachEntry( vFanins, pFanin, i ) + Counter += Ivy_FraigSetActivityFactors_rec( p, Ivy_Regular(pFanin), LevelMin, LevelMax ); + return 1 + Counter; +} + +/**Function************************************************************* + + Synopsis [Sets variable activities in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigSetActivityFactors( Ivy_FraigMan_t * p, Ivy_Obj_t * pOld, Ivy_Obj_t * pNew ) +{ + int clk, LevelMin, LevelMax; + assert( pOld || pNew ); +clk = clock(); + // reset the active variables + veci_resize(&p->pSat->act_vars, 0); + // prepare for traversal + Ivy_ManIncrementTravId( p->pManFraig ); + // determine the min and max level to visit + assert( p->pParams->dActConeRatio > 0 && p->pParams->dActConeRatio < 1 ); + LevelMax = IVY_MAX( (pNew ? pNew->Level : 0), (pOld ? pOld->Level : 0) ); + LevelMin = (int)(LevelMax * (1.0 - p->pParams->dActConeRatio)); + // traverse + if ( pOld && !Ivy_ObjIsConst1(pOld) ) + Ivy_FraigSetActivityFactors_rec( p, pOld, LevelMin, LevelMax ); + if ( pNew && !Ivy_ObjIsConst1(pNew) ) + Ivy_FraigSetActivityFactors_rec( p, pNew, LevelMin, LevelMax ); +//Ivy_FraigPrintActivity( p ); +p->timeTrav += clock() - clk; + return 1; +} + + + +#include "cuddInt.h" + +/**Function************************************************************* + + Synopsis [Checks equivalence using BDDs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +DdNode * Ivy_FraigNodesAreEquivBdd_int( DdManager * dd, DdNode * bFunc, Vec_Ptr_t * vFront, int Level ) +{ + DdNode ** pFuncs; + DdNode * bFuncNew; + Vec_Ptr_t * vTemp; + Ivy_Obj_t * pObj, * pFanin; + int i, NewSize; + // create new frontier + vTemp = Vec_PtrAlloc( 100 ); + Vec_PtrForEachEntry( vFront, pObj, i ) + { + if ( (int)pObj->Level != Level ) + { + pObj->fMarkB = 1; + pObj->TravId = Vec_PtrSize(vTemp); + Vec_PtrPush( vTemp, pObj ); + continue; + } + + pFanin = Ivy_ObjFanin0(pObj); + if ( pFanin->fMarkB == 0 ) + { + pFanin->fMarkB = 1; + pFanin->TravId = Vec_PtrSize(vTemp); + Vec_PtrPush( vTemp, pFanin ); + } + + pFanin = Ivy_ObjFanin1(pObj); + if ( pFanin->fMarkB == 0 ) + { + pFanin->fMarkB = 1; + pFanin->TravId = Vec_PtrSize(vTemp); + Vec_PtrPush( vTemp, pFanin ); + } + } + // collect the permutation + NewSize = IVY_MAX(dd->size, Vec_PtrSize(vTemp)); + pFuncs = ALLOC( DdNode *, NewSize ); + Vec_PtrForEachEntry( vFront, pObj, i ) + { + if ( (int)pObj->Level != Level ) + pFuncs[i] = Cudd_bddIthVar( dd, pObj->TravId ); + else + pFuncs[i] = Cudd_bddAnd( dd, + Cudd_NotCond( Cudd_bddIthVar(dd, Ivy_ObjFanin0(pObj)->TravId), Ivy_ObjFaninC0(pObj) ), + Cudd_NotCond( Cudd_bddIthVar(dd, Ivy_ObjFanin1(pObj)->TravId), Ivy_ObjFaninC1(pObj) ) ); + Cudd_Ref( pFuncs[i] ); + } + // add the remaining vars + assert( NewSize == dd->size ); + for ( i = Vec_PtrSize(vFront); i < dd->size; i++ ) + { + pFuncs[i] = Cudd_bddIthVar( dd, i ); + Cudd_Ref( pFuncs[i] ); + } + + // create new + bFuncNew = Cudd_bddVectorCompose( dd, bFunc, pFuncs ); Cudd_Ref( bFuncNew ); + // clean trav Id + Vec_PtrForEachEntry( vTemp, pObj, i ) + { + pObj->fMarkB = 0; + pObj->TravId = 0; + } + // deref + for ( i = 0; i < dd->size; i++ ) + Cudd_RecursiveDeref( dd, pFuncs[i] ); + free( pFuncs ); + + free( vFront->pArray ); + *vFront = *vTemp; + + vTemp->nCap = vTemp->nSize = 0; + vTemp->pArray = NULL; + Vec_PtrFree( vTemp ); + + Cudd_Deref( bFuncNew ); + return bFuncNew; +} + +/**Function************************************************************* + + Synopsis [Checks equivalence using BDDs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_FraigNodesAreEquivBdd( Ivy_Obj_t * pObj1, Ivy_Obj_t * pObj2 ) +{ + static DdManager * dd = NULL; + DdNode * bFunc, * bTemp; + Vec_Ptr_t * vFront; + Ivy_Obj_t * pObj; + int i, RetValue, Iter, Level; + // start the manager + if ( dd == NULL ) + dd = Cudd_Init( 50, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 ); + // create front + vFront = Vec_PtrAlloc( 100 ); + Vec_PtrPush( vFront, pObj1 ); + Vec_PtrPush( vFront, pObj2 ); + // get the function + bFunc = Cudd_bddXor( dd, Cudd_bddIthVar(dd,0), Cudd_bddIthVar(dd,1) ); Cudd_Ref( bFunc ); + bFunc = Cudd_NotCond( bFunc, pObj1->fPhase != pObj2->fPhase ); + // try running BDDs + for ( Iter = 0; ; Iter++ ) + { + // find max level + Level = 0; + Vec_PtrForEachEntry( vFront, pObj, i ) + if ( Level < (int)pObj->Level ) + Level = (int)pObj->Level; + if ( Level == 0 ) + break; + bFunc = Ivy_FraigNodesAreEquivBdd_int( dd, bTemp = bFunc, vFront, Level ); Cudd_Ref( bFunc ); + Cudd_RecursiveDeref( dd, bTemp ); + if ( bFunc == Cudd_ReadLogicZero(dd) ) // proved + {printf( "%d", Iter ); break;} + if ( Cudd_DagSize(bFunc) > 1000 ) + {printf( "b" ); break;} + if ( dd->size > 120 ) + {printf( "s" ); break;} + if ( Iter > 50 ) + {printf( "i" ); break;} + } + if ( bFunc == Cudd_ReadLogicZero(dd) ) // unsat + RetValue = 1; + else if ( Level == 0 ) // sat + RetValue = 0; + else + RetValue = -1; // spaceout/timeout + Cudd_RecursiveDeref( dd, bFunc ); + Vec_PtrFree( vFront ); + return RetValue; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyHaig.c b/src/aig/ivy/ivyHaig.c new file mode 100644 index 00000000..87021600 --- /dev/null +++ b/src/aig/ivy/ivyHaig.c @@ -0,0 +1,530 @@ +/**CFile**************************************************************** + + FileName [ivyHaig.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [HAIG management procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyHaig.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/* + HAIGing rules in working AIG: + - Each node in the working AIG has a pointer to the corresponding node in HAIG + (this node is not necessarily the representative of the equivalence class of HAIG nodes) + - This pointer is complemented if the AIG node and its corresponding HAIG node have different phase + + Choice node rules in HAIG: + - Equivalent nodes are linked into a ring + - Exactly one node in the ring has fanouts (this node is called the representative) + - The pointer going from a node to the next node in the ring is complemented + if the first node is complemented, compared to the representative node of the equivalence class + - (consequence of the above) The representative node always has non-complemented pointer to the next node + - New nodes are inserted into the ring immediately after the representative node +*/ + +// returns the representative node of the given HAIG node +static inline Ivy_Obj_t * Ivy_HaigObjRepr( Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pTemp; + assert( !Ivy_IsComplement(pObj) ); + // if the node has no equivalent node or has fanout, it is representative + if ( pObj->pEquiv == NULL || Ivy_ObjRefs(pObj) > 0 ) + return pObj; + // the node belongs to a class and is not a representative + // complemented edge (pObj->pEquiv) tells if it is complemented w.r.t. the repr + for ( pTemp = Ivy_Regular(pObj->pEquiv); pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + if ( Ivy_ObjRefs(pTemp) > 0 ) + break; + // return the representative node + assert( Ivy_ObjRefs(pTemp) > 0 ); + return Ivy_NotCond( pTemp, Ivy_IsComplement(pObj->pEquiv) ); +} + +// counts the number of nodes in the equivalence class +static inline int Ivy_HaigObjCountClass( Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pTemp; + int Counter; + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjRefs(pObj) > 0 ); + if ( pObj->pEquiv == NULL ) + return 1; + assert( !Ivy_IsComplement(pObj->pEquiv) ); + Counter = 1; + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + Counter++; + return Counter; +} + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts HAIG for the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigStart( Ivy_Man_t * p, int fVerbose ) +{ + Vec_Int_t * vLatches; + Ivy_Obj_t * pObj; + int i; + assert( p->pHaig == NULL ); + p->pHaig = Ivy_ManDup( p ); + + if ( fVerbose ) + { + printf( "Starting : " ); + Ivy_ManPrintStats( p->pHaig ); + } + + // collect latches of design D and set their values to be DC + vLatches = Vec_IntAlloc( 100 ); + Ivy_ManForEachLatch( p->pHaig, pObj, i ) + { + pObj->Init = IVY_INIT_DC; + Vec_IntPush( vLatches, pObj->Id ); + } + p->pHaig->pData = vLatches; +/* + { + int x; + Ivy_ManShow( p, 0, NULL ); + Ivy_ManShow( p->pHaig, 1, NULL ); + x = 0; + } +*/ +} + +/**Function************************************************************* + + Synopsis [Transfers the HAIG to the newly created manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigTrasfer( Ivy_Man_t * p, Ivy_Man_t * pNew ) +{ + Ivy_Obj_t * pObj; + int i; + assert( p->pHaig != NULL ); + Ivy_ManConst1(pNew)->pEquiv = Ivy_ManConst1(p)->pEquiv; + Ivy_ManForEachPi( pNew, pObj, i ) + pObj->pEquiv = Ivy_ManPi( p, i )->pEquiv; + pNew->pHaig = p->pHaig; +} + +/**Function************************************************************* + + Synopsis [Stops HAIG for the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigStop( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + assert( p->pHaig != NULL ); + Vec_IntFree( p->pHaig->pData ); + Ivy_ManStop( p->pHaig ); + p->pHaig = NULL; + // remove dangling pointers to the HAIG objects + Ivy_ManForEachObj( p, pObj, i ) + pObj->pEquiv = NULL; +} + +/**Function************************************************************* + + Synopsis [Creates a new node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigCreateObj( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pEquiv0, * pEquiv1; + assert( p->pHaig != NULL ); + assert( !Ivy_IsComplement(pObj) ); + if ( Ivy_ObjType(pObj) == IVY_BUF ) + pObj->pEquiv = Ivy_ObjChild0Equiv(pObj); + else if ( Ivy_ObjType(pObj) == IVY_LATCH ) + { +// pObj->pEquiv = Ivy_Latch( p->pHaig, Ivy_ObjChild0Equiv(pObj), pObj->Init ); + pEquiv0 = Ivy_ObjChild0Equiv(pObj); + pEquiv0 = Ivy_NotCond( Ivy_HaigObjRepr(Ivy_Regular(pEquiv0)), Ivy_IsComplement(pEquiv0) ); + pObj->pEquiv = Ivy_Latch( p->pHaig, pEquiv0, pObj->Init ); + } + else if ( Ivy_ObjType(pObj) == IVY_AND ) + { +// pObj->pEquiv = Ivy_And( p->pHaig, Ivy_ObjChild0Equiv(pObj), Ivy_ObjChild1Equiv(pObj) ); + pEquiv0 = Ivy_ObjChild0Equiv(pObj); + pEquiv0 = Ivy_NotCond( Ivy_HaigObjRepr(Ivy_Regular(pEquiv0)), Ivy_IsComplement(pEquiv0) ); + pEquiv1 = Ivy_ObjChild1Equiv(pObj); + pEquiv1 = Ivy_NotCond( Ivy_HaigObjRepr(Ivy_Regular(pEquiv1)), Ivy_IsComplement(pEquiv1) ); + pObj->pEquiv = Ivy_And( p->pHaig, pEquiv0, pEquiv1 ); + } + else assert( 0 ); + // make sure the node points to the representative +// pObj->pEquiv = Ivy_NotCond( Ivy_HaigObjRepr(Ivy_Regular(pObj->pEquiv)), Ivy_IsComplement(pObj->pEquiv) ); +} + +/**Function************************************************************* + + Synopsis [Checks if the old node is in the TFI of the new node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ObjIsInTfi_rec( Ivy_Obj_t * pObjNew, Ivy_Obj_t * pObjOld, int Levels ) +{ + if ( pObjNew == pObjOld ) + return 1; + if ( Levels == 0 || Ivy_ObjIsCi(pObjNew) || Ivy_ObjIsConst1(pObjNew) ) + return 0; + if ( Ivy_ObjIsInTfi_rec( Ivy_ObjFanin0(pObjNew), pObjOld, Levels - 1 ) ) + return 1; + if ( Ivy_ObjIsNode(pObjNew) && Ivy_ObjIsInTfi_rec( Ivy_ObjFanin1(pObjNew), pObjOld, Levels - 1 ) ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Sets the pair of equivalent nodes in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigCreateChoice( Ivy_Man_t * p, Ivy_Obj_t * pObjOld, Ivy_Obj_t * pObjNew ) +{ + Ivy_Obj_t * pObjOldHaig, * pObjNewHaig; + Ivy_Obj_t * pObjOldHaigR, * pObjNewHaigR; + int fCompl; +//printf( "\nCreating choice for %d and %d in AIG\n", pObjOld->Id, Ivy_Regular(pObjNew)->Id ); + + assert( p->pHaig != NULL ); + assert( !Ivy_IsComplement(pObjOld) ); + // get pointers to the representatives of pObjOld and pObjNew + pObjOldHaig = pObjOld->pEquiv; + pObjNewHaig = Ivy_NotCond( Ivy_Regular(pObjNew)->pEquiv, Ivy_IsComplement(pObjNew) ); + // get the classes + pObjOldHaig = Ivy_NotCond( Ivy_HaigObjRepr(Ivy_Regular(pObjOldHaig)), Ivy_IsComplement(pObjOldHaig) ); + pObjNewHaig = Ivy_NotCond( Ivy_HaigObjRepr(Ivy_Regular(pObjNewHaig)), Ivy_IsComplement(pObjNewHaig) ); + // get regular pointers + pObjOldHaigR = Ivy_Regular(pObjOldHaig); + pObjNewHaigR = Ivy_Regular(pObjNewHaig); + // check if there is phase difference between them + fCompl = (Ivy_IsComplement(pObjOldHaig) != Ivy_IsComplement(pObjNewHaig)); + // if the class is the same, nothing to do + if ( pObjOldHaigR == pObjNewHaigR ) + return; + // if the second node belongs to a class, do not merge classes (for the time being) + if ( Ivy_ObjRefs(pObjOldHaigR) == 0 || pObjNewHaigR->pEquiv != NULL || + Ivy_ObjRefs(pObjNewHaigR) > 0 ) //|| Ivy_ObjIsInTfi_rec(pObjNewHaigR, pObjOldHaigR, 10) ) + { +/* + if ( pObjNewHaigR->pEquiv != NULL ) + printf( "c" ); + if ( Ivy_ObjRefs(pObjNewHaigR) > 0 ) + printf( "f" ); + printf( " " ); +*/ + p->pHaig->nClassesSkip++; + return; + } + + // add this node to the class of pObjOldHaig + assert( Ivy_ObjRefs(pObjOldHaigR) > 0 ); + assert( !Ivy_IsComplement(pObjOldHaigR->pEquiv) ); + if ( pObjOldHaigR->pEquiv == NULL ) + pObjNewHaigR->pEquiv = Ivy_NotCond( pObjOldHaigR, fCompl ); + else + pObjNewHaigR->pEquiv = Ivy_NotCond( pObjOldHaigR->pEquiv, fCompl ); + pObjOldHaigR->pEquiv = pObjNewHaigR; +//printf( "Setting choice node %d -> %d.\n", pObjOldHaigR->Id, pObjNewHaigR->Id ); + // update the class of the new node +// Ivy_Regular(pObjNew)->pEquiv = Ivy_NotCond( pObjOldHaigR, fCompl ^ Ivy_IsComplement(pObjNew) ); +//printf( "Creating choice for %d and %d in HAIG\n", pObjOldHaigR->Id, pObjNewHaigR->Id ); + +// if ( pObjOldHaigR->Id == 13 ) +// { +// Ivy_ManShow( p, 0 ); +// Ivy_ManShow( p->pHaig, 1 ); +// } +// if ( !Ivy_ManIsAcyclic( p->pHaig ) ) +// printf( "HAIG contains a cycle\n" ); +} + +/**Function************************************************************* + + Synopsis [Count the number of choices and choice nodes in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManHaigCountChoices( Ivy_Man_t * p, int * pnChoices ) +{ + Ivy_Obj_t * pObj; + int nChoices, nChoiceNodes, Counter, i; + assert( p->pHaig != NULL ); + nChoices = nChoiceNodes = 0; + Ivy_ManForEachObj( p->pHaig, pObj, i ) + { + if ( Ivy_ObjIsTerm(pObj) || i == 0 ) + continue; + if ( Ivy_ObjRefs(pObj) == 0 ) + continue; + Counter = Ivy_HaigObjCountClass( pObj ); + nChoiceNodes += (int)(Counter > 1); + nChoices += Counter - 1; +// if ( Counter > 1 ) +// printf( "Choice node %d %s\n", pObj->Id, Ivy_ObjIsLatch(pObj)? "(latch)": "" ); + } + *pnChoices = nChoices; + return nChoiceNodes; +} + +/**Function************************************************************* + + Synopsis [Prints statistics of the HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigPostprocess( Ivy_Man_t * p, int fVerbose ) +{ + int nChoices, nChoiceNodes; + + assert( p->pHaig != NULL ); + + if ( fVerbose ) + { + printf( "Final : " ); + Ivy_ManPrintStats( p ); + printf( "HAIG : " ); + Ivy_ManPrintStats( p->pHaig ); + + // print choice node stats + nChoiceNodes = Ivy_ManHaigCountChoices( p, &nChoices ); + printf( "Total choice nodes = %d. Total choices = %d. Skipped classes = %d.\n", + nChoiceNodes, nChoices, p->pHaig->nClassesSkip ); + } + + if ( Ivy_ManIsAcyclic( p->pHaig ) ) + { + if ( fVerbose ) + printf( "HAIG is acyclic\n" ); + } + else + printf( "HAIG contains a cycle\n" ); + +// if ( fVerbose ) +// Ivy_ManHaigSimulate( p ); +} + + +/**Function************************************************************* + + Synopsis [Applies the simulation rules.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Ivy_Init_t Ivy_ManHaigSimulateAnd( Ivy_Init_t In0, Ivy_Init_t In1 ) +{ + assert( In0 != IVY_INIT_NONE && In1 != IVY_INIT_NONE ); + if ( In0 == IVY_INIT_DC || In1 == IVY_INIT_DC ) + return IVY_INIT_DC; + if ( In0 == IVY_INIT_1 && In1 == IVY_INIT_1 ) + return IVY_INIT_1; + return IVY_INIT_0; +} + +/**Function************************************************************* + + Synopsis [Applies the simulation rules.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Ivy_Init_t Ivy_ManHaigSimulateChoice( Ivy_Init_t In0, Ivy_Init_t In1 ) +{ + assert( In0 != IVY_INIT_NONE && In1 != IVY_INIT_NONE ); + if ( (In0 == IVY_INIT_0 && In1 == IVY_INIT_1) || (In0 == IVY_INIT_1 && In1 == IVY_INIT_0) ) + { + printf( "Compatibility fails.\n" ); + return IVY_INIT_0; + } + if ( In0 == IVY_INIT_DC && In1 == IVY_INIT_DC ) + return IVY_INIT_DC; + if ( In0 != IVY_INIT_DC ) + return In0; + return In1; +} + +/**Function************************************************************* + + Synopsis [Simulate HAIG using modified 3-valued simulation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManHaigSimulate( Ivy_Man_t * p ) +{ + Vec_Int_t * vNodes, * vLatches, * vLatchesD; + Ivy_Obj_t * pObj, * pTemp; + Ivy_Init_t In0, In1; + int i, k, Counter; + int fVerbose = 0; + + // check choices + Ivy_ManCheckChoices( p ); + + // switch to HAIG + assert( p->pHaig != NULL ); + p = p->pHaig; + +if ( fVerbose ) +Ivy_ManForEachPi( p, pObj, i ) +printf( "Setting PI %d\n", pObj->Id ); + + // collect latches and nodes in the DFS order + vNodes = Ivy_ManDfsSeq( p, &vLatches ); + +if ( fVerbose ) +Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) +printf( "Collected node %d with fanins %d and %d\n", pObj->Id, Ivy_ObjFanin0(pObj)->Id, Ivy_ObjFanin1(pObj)->Id ); + + // set the PI values + Ivy_ManConst1(p)->Init = IVY_INIT_1; + Ivy_ManForEachPi( p, pObj, i ) + pObj->Init = IVY_INIT_0; + + // set the latch values + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + pObj->Init = IVY_INIT_DC; + // set the latches of D to be determinate + vLatchesD = p->pData; + Ivy_ManForEachNodeVec( p, vLatchesD, pObj, i ) + pObj->Init = IVY_INIT_0; + + // perform several rounds of simulation + for ( k = 0; k < 10; k++ ) + { + // count the number of non-determinate values + Counter = 0; + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + Counter += ( pObj->Init == IVY_INIT_DC ); + printf( "Iter %d : Non-determinate = %d\n", k, Counter ); + + // simulate the internal nodes + Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) + { +if ( fVerbose ) +printf( "Processing node %d with fanins %d and %d\n", pObj->Id, Ivy_ObjFanin0(pObj)->Id, Ivy_ObjFanin1(pObj)->Id ); + In0 = Ivy_InitNotCond( Ivy_ObjFanin0(pObj)->Init, Ivy_ObjFaninC0(pObj) ); + In1 = Ivy_InitNotCond( Ivy_ObjFanin1(pObj)->Init, Ivy_ObjFaninC1(pObj) ); + pObj->Init = Ivy_ManHaigSimulateAnd( In0, In1 ); + // simulate the equivalence class if the node is a representative + if ( pObj->pEquiv && Ivy_ObjRefs(pObj) > 0 ) + { +if ( fVerbose ) +printf( "Processing choice node %d\n", pObj->Id ); + In0 = pObj->Init; + assert( !Ivy_IsComplement(pObj->pEquiv) ); + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + { +if ( fVerbose ) +printf( "Processing secondary node %d\n", pTemp->Id ); + In1 = Ivy_InitNotCond( pTemp->Init, Ivy_IsComplement(pTemp->pEquiv) ); + In0 = Ivy_ManHaigSimulateChoice( In0, In1 ); + } + pObj->Init = In0; + } + } + + // simulate the latches + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + { + pObj->Level = Ivy_ObjFanin0(pObj)->Init; +if ( fVerbose ) +printf( "Using latch %d with fanin %d\n", pObj->Id, Ivy_ObjFanin0(pObj)->Id ); + } + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + pObj->Init = pObj->Level, pObj->Level = 0; + } + // free arrays + Vec_IntFree( vNodes ); + Vec_IntFree( vLatches ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyMan.c b/src/aig/ivy/ivyMan.c new file mode 100644 index 00000000..07faef85 --- /dev/null +++ b/src/aig/ivy/ivyMan.c @@ -0,0 +1,546 @@ +/**CFile**************************************************************** + + FileName [ivyMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [AIG manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivy_.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManStart() +{ + Ivy_Man_t * p; + // start the manager + p = ALLOC( Ivy_Man_t, 1 ); + memset( p, 0, sizeof(Ivy_Man_t) ); + // perform initializations + p->Ghost.Id = -1; + p->nTravIds = 1; + p->fCatchExor = 1; + // allocate arrays for nodes + p->vPis = Vec_PtrAlloc( 100 ); + p->vPos = Vec_PtrAlloc( 100 ); + p->vBufs = Vec_PtrAlloc( 100 ); + p->vObjs = Vec_PtrAlloc( 100 ); + // prepare the internal memory manager + Ivy_ManStartMemory( p ); + // create the constant node + p->pConst1 = Ivy_ManFetchMemory( p ); + p->pConst1->fPhase = 1; + Vec_PtrPush( p->vObjs, p->pConst1 ); + p->nCreated = 1; + // start the table + p->nTableSize = 10007; + p->pTable = ALLOC( int, p->nTableSize ); + memset( p->pTable, 0, sizeof(int) * p->nTableSize ); + return p; +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManStartFrom( Ivy_Man_t * p ) +{ + Ivy_Man_t * pNew; + Ivy_Obj_t * pObj; + int i; + // create the new manager + pNew = Ivy_ManStart(); + // create the PIs + Ivy_ManConst1(p)->pEquiv = Ivy_ManConst1(pNew); + Ivy_ManForEachPi( p, pObj, i ) + pObj->pEquiv = Ivy_ObjCreatePi(pNew); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManDup( Ivy_Man_t * p ) +{ + Vec_Int_t * vNodes, * vLatches; + Ivy_Man_t * pNew; + Ivy_Obj_t * pObj; + int i; + // collect latches and nodes in the DFS order + vNodes = Ivy_ManDfsSeq( p, &vLatches ); + // create the new manager + pNew = Ivy_ManStart(); + // create the PIs + Ivy_ManConst1(p)->pEquiv = Ivy_ManConst1(pNew); + Ivy_ManForEachPi( p, pObj, i ) + pObj->pEquiv = Ivy_ObjCreatePi(pNew); + // create the fake PIs for latches + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + pObj->pEquiv = Ivy_ObjCreatePi(pNew); + // duplicate internal nodes + Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) + if ( Ivy_ObjIsBuf(pObj) ) + pObj->pEquiv = Ivy_ObjChild0Equiv(pObj); + else + pObj->pEquiv = Ivy_And( pNew, Ivy_ObjChild0Equiv(pObj), Ivy_ObjChild1Equiv(pObj) ); + // add the POs + Ivy_ManForEachPo( p, pObj, i ) + Ivy_ObjCreatePo( pNew, Ivy_ObjChild0Equiv(pObj) ); + // transform additional PI nodes into latches and connect them + Ivy_ManForEachNodeVec( p, vLatches, pObj, i ) + { + assert( !Ivy_ObjFaninC0(pObj) ); + pObj->pEquiv->Type = IVY_LATCH; + pObj->pEquiv->Init = pObj->Init; + Ivy_ObjConnect( pNew, pObj->pEquiv, Ivy_ObjChild0Equiv(pObj), NULL ); + } + // shrink the arrays + Vec_PtrShrink( pNew->vPis, Ivy_ManPiNum(p) ); + // update the counters of different objects + pNew->nObjs[IVY_PI] -= Ivy_ManLatchNum(p); + pNew->nObjs[IVY_LATCH] += Ivy_ManLatchNum(p); + // free arrays + Vec_IntFree( vNodes ); + Vec_IntFree( vLatches ); + // make sure structural hashing did not change anything + assert( Ivy_ManNodeNum(p) == Ivy_ManNodeNum(pNew) ); + assert( Ivy_ManLatchNum(p) == Ivy_ManLatchNum(pNew) ); + // check the resulting network + if ( !Ivy_ManCheck(pNew) ) + printf( "Ivy_ManMakeSeq(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManFrames( Ivy_Man_t * pMan, int nLatches, int nFrames, int fInit, Vec_Ptr_t ** pvMapping ) +{ + Vec_Ptr_t * vMapping; + Ivy_Man_t * pNew; + Ivy_Obj_t * pObj; + int i, f, nPis, nPos, nIdMax; + assert( Ivy_ManLatchNum(pMan) == 0 ); + assert( nFrames > 0 ); + // prepare the mapping + nPis = Ivy_ManPiNum(pMan) - nLatches; + nPos = Ivy_ManPoNum(pMan) - nLatches; + nIdMax = Ivy_ManObjIdMax(pMan); + // create the new manager + pNew = Ivy_ManStart(); + // set the starting values of latch inputs + for ( i = 0; i < nLatches; i++ ) + Ivy_ManPo(pMan, nPos+i)->pEquiv = fInit? Ivy_Not(Ivy_ManConst1(pNew)) : Ivy_ObjCreatePi(pNew); + // add timeframes + vMapping = Vec_PtrStart( nIdMax * nFrames + 1 ); + for ( f = 0; f < nFrames; f++ ) + { + // create PIs + Ivy_ManConst1(pMan)->pEquiv = Ivy_ManConst1(pNew); + for ( i = 0; i < nPis; i++ ) + Ivy_ManPi(pMan, i)->pEquiv = Ivy_ObjCreatePi(pNew); + // transfer values to latch outputs + for ( i = 0; i < nLatches; i++ ) + Ivy_ManPi(pMan, nPis+i)->pEquiv = Ivy_ManPo(pMan, nPos+i)->pEquiv; + // perform strashing + Ivy_ManForEachNode( pMan, pObj, i ) + pObj->pEquiv = Ivy_And( pNew, Ivy_ObjChild0Equiv(pObj), Ivy_ObjChild1Equiv(pObj) ); + // create POs + for ( i = 0; i < nPos; i++ ) + Ivy_ManPo(pMan, i)->pEquiv = Ivy_ObjCreatePo( pNew, Ivy_ObjChild0Equiv(Ivy_ManPo(pMan, i)) ); + // set the results of latch inputs + for ( i = 0; i < nLatches; i++ ) + Ivy_ManPo(pMan, nPos+i)->pEquiv = Ivy_ObjChild0Equiv(Ivy_ManPo(pMan, nPos+i)); + // save the pointers in this frame + Ivy_ManForEachObj( pMan, pObj, i ) + Vec_PtrWriteEntry( vMapping, f * nIdMax + i, pObj->pEquiv ); + } + // connect latches + if ( !fInit ) + for ( i = 0; i < nLatches; i++ ) + Ivy_ObjCreatePo( pNew, Ivy_ManPo(pMan, nPos+i)->pEquiv ); + // remove dangling nodes + Ivy_ManCleanup(pNew); + *pvMapping = vMapping; + // check the resulting network + if ( !Ivy_ManCheck(pNew) ) + printf( "Ivy_ManFrames(): The check has failed.\n" ); + return pNew; +} + + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManStop( Ivy_Man_t * p ) +{ + if ( p->time1 ) { PRT( "Update lev ", p->time1 ); } + if ( p->time2 ) { PRT( "Update levR ", p->time2 ); } +// Ivy_TableProfile( p ); +// if ( p->vFanouts ) Ivy_ManStopFanout( p ); + if ( p->vChunks ) Ivy_ManStopMemory( p ); + if ( p->vRequired ) Vec_IntFree( p->vRequired ); + if ( p->vPis ) Vec_PtrFree( p->vPis ); + if ( p->vPos ) Vec_PtrFree( p->vPos ); + if ( p->vBufs ) Vec_PtrFree( p->vBufs ); + if ( p->vObjs ) Vec_PtrFree( p->vObjs ); + free( p->pTable ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Removes nodes without fanout.] + + Description [Returns the number of dangling nodes removed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManCleanup( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pNode; + int i, nNodesOld; + nNodesOld = Ivy_ManNodeNum(p); + Ivy_ManForEachObj( p, pNode, i ) + if ( Ivy_ObjIsNode(pNode) || Ivy_ObjIsLatch(pNode) || Ivy_ObjIsBuf(pNode) ) + if ( Ivy_ObjRefs(pNode) == 0 ) + Ivy_ObjDelete_rec( p, pNode, 1 ); +//printf( "Cleanup removed %d nodes.\n", nNodesOld - Ivy_ManNodeNum(p) ); + return nNodesOld - Ivy_ManNodeNum(p); +} + +/**Function************************************************************* + + Synopsis [Marks nodes reachable from the given one.] + + Description [Returns the number of dangling nodes removed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCleanupSeq_rec( Ivy_Obj_t * pObj ) +{ + if ( Ivy_ObjIsMarkA(pObj) ) + return; + Ivy_ObjSetMarkA(pObj); + if ( pObj->pFanin0 != NULL ) + Ivy_ManCleanupSeq_rec( Ivy_ObjFanin0(pObj) ); + if ( pObj->pFanin1 != NULL ) + Ivy_ManCleanupSeq_rec( Ivy_ObjFanin1(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Removes logic that does not feed into POs.] + + Description [Returns the number of dangling nodes removed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManCleanupSeq( Ivy_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + Ivy_Obj_t * pObj; + int i, RetValue; + // mark the constant and PIs + Ivy_ObjSetMarkA( Ivy_ManConst1(p) ); + Ivy_ManForEachPi( p, pObj, i ) + Ivy_ObjSetMarkA( pObj ); + // mark nodes visited from POs + Ivy_ManForEachPo( p, pObj, i ) + Ivy_ManCleanupSeq_rec( pObj ); + // collect unmarked nodes + vNodes = Vec_PtrAlloc( 100 ); + Ivy_ManForEachObj( p, pObj, i ) + { + if ( Ivy_ObjIsMarkA(pObj) ) + Ivy_ObjClearMarkA(pObj); + else + Vec_PtrPush( vNodes, pObj ); + } + if ( Vec_PtrSize(vNodes) == 0 ) + { + Vec_PtrFree( vNodes ); +//printf( "Sequential sweep cleaned out %d nodes.\n", 0 ); + return 0; + } + // disconnect the marked objects + Vec_PtrForEachEntry( vNodes, pObj, i ) + Ivy_ObjDisconnect( p, pObj ); + // remove the dangling objects + Vec_PtrForEachEntry( vNodes, pObj, i ) + { + assert( Ivy_ObjIsNode(pObj) || Ivy_ObjIsLatch(pObj) || Ivy_ObjIsBuf(pObj) ); + assert( Ivy_ObjRefs(pObj) == 0 ); + // update node counters of the manager + p->nObjs[pObj->Type]--; + p->nDeleted++; + // delete buffer from the array of buffers + if ( p->fFanout && Ivy_ObjIsBuf(pObj) ) + Vec_PtrRemove( p->vBufs, pObj ); + // free the node + Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL ); + Ivy_ManRecycleMemory( p, pObj ); + } + // return the number of nodes freed + RetValue = Vec_PtrSize(vNodes); + Vec_PtrFree( vNodes ); +//printf( "Sequential sweep cleaned out %d nodes.\n", RetValue ); + return RetValue; +} + + +/**Function************************************************************* + + Synopsis [Checks if latches form self-loop.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManLatchIsSelfFeed_rec( Ivy_Obj_t * pLatch, Ivy_Obj_t * pLatchRoot ) +{ + if ( !Ivy_ObjIsLatch(pLatch) && !Ivy_ObjIsBuf(pLatch) ) + return 0; + if ( pLatch == pLatchRoot ) + return 1; + return Ivy_ManLatchIsSelfFeed_rec( Ivy_ObjFanin0(pLatch), pLatchRoot ); +} + +/**Function************************************************************* + + Synopsis [Checks if latches form self-loop.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManLatchIsSelfFeed( Ivy_Obj_t * pLatch ) +{ + if ( !Ivy_ObjIsLatch(pLatch) ) + return 0; + return Ivy_ManLatchIsSelfFeed_rec( Ivy_ObjFanin0(pLatch), pLatch ); +} + + +/**Function************************************************************* + + Synopsis [Returns the number of dangling nodes removed.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManPropagateBuffers( Ivy_Man_t * p, int fUpdateLevel ) +{ + Ivy_Obj_t * pNode; + int LimitFactor = 100; + int NodeBeg = Ivy_ManNodeNum(p); + int nSteps; + for ( nSteps = 0; Vec_PtrSize(p->vBufs) > 0; nSteps++ ) + { + pNode = Vec_PtrEntryLast(p->vBufs); + while ( Ivy_ObjIsBuf(pNode) ) + pNode = Ivy_ObjReadFirstFanout( p, pNode ); + // check if this buffer should remain + if ( Ivy_ManLatchIsSelfFeed(pNode) ) + { + Vec_PtrPop(p->vBufs); + continue; + } +//printf( "Propagating buffer %d with input %d and output %d\n", Ivy_ObjFaninId0(pNode), Ivy_ObjFaninId0(Ivy_ObjFanin0(pNode)), pNode->Id ); +//printf( "Latch num %d\n", Ivy_ManLatchNum(p) ); + Ivy_NodeFixBufferFanins( p, pNode, fUpdateLevel ); + if ( nSteps > NodeBeg * LimitFactor ) + { + printf( "Structural hashing is not finished after %d forward latch moves.\n", NodeBeg * LimitFactor ); + printf( "This circuit cannot be forward-retimed completely. Quitting.\n" ); + break; + } + } +// printf( "Number of steps = %d. Nodes beg = %d. Nodes end = %d.\n", nSteps, NodeBeg, Ivy_ManNodeNum(p) ); + return nSteps; +} + +/**Function************************************************************* + + Synopsis [Stops the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManPrintStats( Ivy_Man_t * p ) +{ + printf( "PI/PO = %d/%d ", Ivy_ManPiNum(p), Ivy_ManPoNum(p) ); + printf( "A = %7d. ", Ivy_ManAndNum(p) ); + printf( "L = %5d. ", Ivy_ManLatchNum(p) ); +// printf( "X = %d. ", Ivy_ManExorNum(p) ); +// printf( "B = %3d. ", Ivy_ManBufNum(p) ); + printf( "MaxID = %7d. ", Ivy_ManObjIdMax(p) ); +// printf( "Cre = %d. ", p->nCreated ); +// printf( "Del = %d. ", p->nDeleted ); + printf( "Lev = %3d. ", Ivy_ManLatchNum(p)? -1 : Ivy_ManLevels(p) ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Converts a combinational AIG manager into a sequential one.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManMakeSeq( Ivy_Man_t * p, int nLatches, int * pInits ) +{ + Ivy_Obj_t * pObj, * pLatch; + Ivy_Init_t Init; + int i; + if ( nLatches == 0 ) + return; + assert( nLatches < Ivy_ManPiNum(p) && nLatches < Ivy_ManPoNum(p) ); + assert( Ivy_ManPiNum(p) == Vec_PtrSize(p->vPis) ); + assert( Ivy_ManPoNum(p) == Vec_PtrSize(p->vPos) ); + assert( Vec_PtrSize( p->vBufs ) == 0 ); + // create fanouts + if ( p->fFanout == 0 ) + Ivy_ManStartFanout( p ); + // collect the POs to be converted into latches + for ( i = 0; i < nLatches; i++ ) + { + // get the latch value + Init = pInits? pInits[i] : IVY_INIT_0; + // create latch + pObj = Ivy_ManPo( p, Ivy_ManPoNum(p) - nLatches + i ); + pLatch = Ivy_Latch( p, Ivy_ObjChild0(pObj), Init ); + Ivy_ObjDisconnect( p, pObj ); + // recycle the old PO object + Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL ); + Ivy_ManRecycleMemory( p, pObj ); + // convert the corresponding PI to a buffer and connect it to the latch + pObj = Ivy_ManPi( p, Ivy_ManPiNum(p) - nLatches + i ); + pObj->Type = IVY_BUF; + Ivy_ObjConnect( p, pObj, pLatch, NULL ); + // save the buffer + Vec_PtrPush( p->vBufs, pObj ); + } + // shrink the arrays + Vec_PtrShrink( p->vPis, Ivy_ManPiNum(p) - nLatches ); + Vec_PtrShrink( p->vPos, Ivy_ManPoNum(p) - nLatches ); + // update the counters of different objects + p->nObjs[IVY_PI] -= nLatches; + p->nObjs[IVY_PO] -= nLatches; + p->nObjs[IVY_BUF] += nLatches; + p->nDeleted -= 2 * nLatches; + // remove dangling nodes + Ivy_ManCleanup(p); + Ivy_ManCleanupSeq(p); +/* + // check for dangling nodes + Ivy_ManForEachObj( p, pObj, i ) + if ( !Ivy_ObjIsPi(pObj) && !Ivy_ObjIsPo(pObj) && !Ivy_ObjIsConst1(pObj) ) + { + assert( Ivy_ObjRefs(pObj) > 0 ); + assert( Ivy_ObjRefs(pObj) == Ivy_ObjFanoutNum(p, pObj) ); + } +*/ + // perform hashing by propagating the buffers + Ivy_ManPropagateBuffers( p, 0 ); + if ( Ivy_ManBufNum(p) ) + printf( "The number of remaining buffers is %d.\n", Ivy_ManBufNum(p) ); + // fix the levels + Ivy_ManResetLevels( p ); + // check the resulting network + if ( !Ivy_ManCheck(p) ) + printf( "Ivy_ManMakeSeq(): The check has failed.\n" ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyMem.c b/src/aig/ivy/ivyMem.c new file mode 100644 index 00000000..2a96857c --- /dev/null +++ b/src/aig/ivy/ivyMem.c @@ -0,0 +1,116 @@ +/**CFile**************************************************************** + + FileName [ivyMem.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Memory management for the AIG nodes.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyMem.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// memory management +#define IVY_PAGE_SIZE 12 // page size containing 2^IVY_PAGE_SIZE nodes +#define IVY_PAGE_MASK 4095 // page bitmask (2^IVY_PAGE_SIZE)-1 + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the internal memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManStartMemory( Ivy_Man_t * p ) +{ + p->vChunks = Vec_PtrAlloc( 128 ); + p->vPages = Vec_PtrAlloc( 128 ); +} + +/**Function************************************************************* + + Synopsis [Stops the internal memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManStopMemory( Ivy_Man_t * p ) +{ + void * pMemory; + int i; + Vec_PtrForEachEntry( p->vChunks, pMemory, i ) + free( pMemory ); + Vec_PtrFree( p->vChunks ); + Vec_PtrFree( p->vPages ); + p->pListFree = NULL; +} + +/**Function************************************************************* + + Synopsis [Allocates additional memory for the nodes.] + + Description [Allocates IVY_PAGE_SIZE nodes. Aligns memory by 32 bytes. + Records the pointer to the AIG manager in the -1 entry.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManAddMemory( Ivy_Man_t * p ) +{ + char * pMemory; + int i, nBytes; + int EntrySizeMax = 128; + assert( sizeof(Ivy_Obj_t) <= EntrySizeMax ); + assert( p->pListFree == NULL ); +// assert( (Ivy_ManObjNum(p) & IVY_PAGE_MASK) == 0 ); + // allocate new memory page + nBytes = sizeof(Ivy_Obj_t) * (1<<IVY_PAGE_SIZE) + EntrySizeMax; + pMemory = ALLOC( char, nBytes ); + Vec_PtrPush( p->vChunks, pMemory ); + // align memory at the 32-byte boundary + pMemory = pMemory + EntrySizeMax - (((int)pMemory) & (EntrySizeMax-1)); + // remember the manager in the first entry + Vec_PtrPush( p->vPages, pMemory ); + // break the memory down into nodes + p->pListFree = (Ivy_Obj_t *)pMemory; + for ( i = 1; i <= IVY_PAGE_MASK; i++ ) + { + *((char **)pMemory) = pMemory + sizeof(Ivy_Obj_t); + pMemory += sizeof(Ivy_Obj_t); + } + *((char **)pMemory) = NULL; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyMulti.c b/src/aig/ivy/ivyMulti.c new file mode 100644 index 00000000..a7970156 --- /dev/null +++ b/src/aig/ivy/ivyMulti.c @@ -0,0 +1,301 @@ +/**CFile**************************************************************** + + FileName [ivyMulti.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Constructing multi-input AND/EXOR gates.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyMulti.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +#define IVY_EVAL_LIMIT 128 + +typedef struct Ivy_Eva_t_ Ivy_Eva_t; +struct Ivy_Eva_t_ +{ + Ivy_Obj_t * pArg; // the argument node + unsigned Mask; // the mask of covered nodes + int Weight; // the number of covered nodes +}; + +static void Ivy_MultiPrint( Ivy_Man_t * p, Ivy_Eva_t * pEvals, int nLeaves, int nEvals ); +static int Ivy_MultiCover( Ivy_Man_t * p, Ivy_Eva_t * pEvals, int nLeaves, int nEvals, int nLimit, Vec_Ptr_t * vSols ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Constructs a balanced tree while taking sharing into account.] + + Description [Returns 1 if the implementation exists.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_MultiPlus( Ivy_Man_t * p, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vCone, Ivy_Type_t Type, int nLimit, Vec_Ptr_t * vSols ) +{ + static Ivy_Eva_t pEvals[IVY_EVAL_LIMIT]; + Ivy_Eva_t * pEval, * pFan0, * pFan1; + Ivy_Obj_t * pObj, * pTemp; + int nEvals, nEvalsOld, i, k, x, nLeaves; + unsigned uMaskAll; + + // consider special cases + nLeaves = Vec_PtrSize(vLeaves); + assert( nLeaves > 2 ); + if ( nLeaves > 32 || nLeaves + Vec_PtrSize(vCone) > IVY_EVAL_LIMIT ) + return 0; +// if ( nLeaves == 1 ) +// return Vec_PtrEntry( vLeaves, 0 ); +// if ( nLeaves == 2 ) +// return Ivy_Oper( Vec_PtrEntry(vLeaves, 0), Vec_PtrEntry(vLeaves, 1), Type ); + + // set the leaf entries + uMaskAll = ((1 << nLeaves) - 1); + nEvals = 0; + Vec_PtrForEachEntry( vLeaves, pObj, i ) + { + pEval = pEvals + nEvals; + pEval->pArg = pObj; + pEval->Mask = (1 << nEvals); + pEval->Weight = 1; + // mark the leaf + Ivy_Regular(pObj)->TravId = nEvals; + nEvals++; + } + + // propagate masks through the cone + Vec_PtrForEachEntry( vCone, pObj, i ) + { + pObj->TravId = nEvals + i; + if ( Ivy_ObjIsBuf(pObj) ) + pEvals[pObj->TravId].Mask = pEvals[Ivy_ObjFanin0(pObj)->TravId].Mask; + else + pEvals[pObj->TravId].Mask = pEvals[Ivy_ObjFanin0(pObj)->TravId].Mask | pEvals[Ivy_ObjFanin1(pObj)->TravId].Mask; + } + + // set the internal entries + Vec_PtrForEachEntry( vCone, pObj, i ) + { + if ( i == Vec_PtrSize(vCone) - 1 ) + break; + // skip buffers + if ( Ivy_ObjIsBuf(pObj) ) + continue; + // skip nodes without external fanout + if ( Ivy_ObjRefs(pObj) == 0 ) + continue; + assert( !Ivy_IsComplement(pObj) ); + pEval = pEvals + nEvals; + pEval->pArg = pObj; + pEval->Mask = pEvals[pObj->TravId].Mask; + pEval->Weight = Extra_WordCountOnes(pEval->Mask); + // mark the node + pObj->TravId = nEvals; + nEvals++; + } + + // find the available nodes + nEvalsOld = nEvals; + for ( i = 1; i < nEvals; i++ ) + for ( k = 0; k < i; k++ ) + { + pFan0 = pEvals + i; + pFan1 = pEvals + k; + pTemp = Ivy_TableLookup(p, Ivy_ObjCreateGhost(p, pFan0->pArg, pFan1->pArg, Type, IVY_INIT_NONE)); + // skip nodes in the cone + if ( pTemp == NULL || pTemp->fMarkB ) + continue; + // skip the leaves + for ( x = 0; x < nLeaves; x++ ) + if ( pTemp == Ivy_Regular(vLeaves->pArray[x]) ) + break; + if ( x < nLeaves ) + continue; + pEval = pEvals + nEvals; + pEval->pArg = pTemp; + pEval->Mask = pFan0->Mask | pFan1->Mask; + pEval->Weight = (pFan0->Mask & pFan1->Mask) ? Extra_WordCountOnes(pEval->Mask) : pFan0->Weight + pFan1->Weight; + // save the argument + pObj->TravId = nEvals; + nEvals++; + // quit if the number of entries exceeded the limit + if ( nEvals == IVY_EVAL_LIMIT ) + goto Outside; + // quit if we found an acceptable implementation + if ( pEval->Mask == uMaskAll ) + goto Outside; + } +Outside: + +// Ivy_MultiPrint( pEvals, nLeaves, nEvals ); + if ( !Ivy_MultiCover( p, pEvals, nLeaves, nEvals, nLimit, vSols ) ) + return 0; + assert( Vec_PtrSize( vSols ) > 0 ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Computes how many uncovered ones this one covers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_MultiPrint( Ivy_Man_t * p, Ivy_Eva_t * pEvals, int nLeaves, int nEvals ) +{ + Ivy_Eva_t * pEval; + int i, k; + for ( i = nLeaves; i < nEvals; i++ ) + { + pEval = pEvals + i; + printf( "%2d (id = %5d) : |", i-nLeaves, Ivy_ObjId(pEval->pArg) ); + for ( k = 0; k < nLeaves; k++ ) + { + if ( pEval->Mask & (1 << k) ) + printf( "+" ); + else + printf( " " ); + } + printf( "| Lev = %d.\n", Ivy_ObjLevel(pEval->pArg) ); + } +} + +/**Function************************************************************* + + Synopsis [Computes how many uncovered ones this one covers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_MultiWeight( unsigned uMask, int nMaskOnes, unsigned uFound ) +{ + assert( uMask & ~uFound ); + if ( (uMask & uFound) == 0 ) + return nMaskOnes; + return Extra_WordCountOnes( uMask & ~uFound ); +} + +/**Function************************************************************* + + Synopsis [Finds the cover.] + + Description [Returns 1 if the cover is found.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_MultiCover( Ivy_Man_t * p, Ivy_Eva_t * pEvals, int nLeaves, int nEvals, int nLimit, Vec_Ptr_t * vSols ) +{ + int fVerbose = 0; + Ivy_Eva_t * pEval, * pEvalBest; + unsigned uMaskAll, uFound, uTemp; + int i, k, BestK, WeightBest, WeightCur, LevelBest, LevelCur; + uMaskAll = (nLeaves == 32)? (~(unsigned)0) : ((1 << nLeaves) - 1); + uFound = 0; + // solve the covering problem + if ( fVerbose ) + printf( "Solution: " ); + Vec_PtrClear( vSols ); + for ( i = 0; i < nLimit; i++ ) + { + BestK = -1; + for ( k = nEvals - 1; k >= 0; k-- ) + { + pEval = pEvals + k; + if ( (pEval->Mask & ~uFound) == 0 ) + continue; + if ( BestK == -1 ) + { + BestK = k; + pEvalBest = pEval; + WeightBest = Ivy_MultiWeight( pEvalBest->Mask, pEvalBest->Weight, uFound ); + LevelBest = Ivy_ObjLevel( Ivy_Regular(pEvalBest->pArg) ); + continue; + } + // compare BestK and the new one (k) + WeightCur = Ivy_MultiWeight( pEval->Mask, pEval->Weight, uFound ); + LevelCur = Ivy_ObjLevel( Ivy_Regular(pEval->pArg) ); + if ( WeightBest < WeightCur || + (WeightBest == WeightCur && LevelBest > LevelCur) ) + { + BestK = k; + pEvalBest = pEval; + WeightBest = WeightCur; + LevelBest = LevelCur; + } + } + assert( BestK != -1 ); + // if the cost is only 1, take the leaf + if ( WeightBest == 1 && BestK >= nLeaves ) + { + uTemp = (pEvalBest->Mask & ~uFound); + for ( k = 0; k < nLeaves; k++ ) + if ( uTemp & (1 << k) ) + break; + assert( k < nLeaves ); + BestK = k; + pEvalBest = pEvals + BestK; + } + if ( fVerbose ) + { + if ( BestK < nLeaves ) + printf( "L(%d) ", BestK ); + else + printf( "%d ", BestK - nLeaves ); + } + // update the found set + Vec_PtrPush( vSols, pEvalBest->pArg ); + uFound |= pEvalBest->Mask; + if ( uFound == uMaskAll ) + break; + } + if ( uFound == uMaskAll ) + { + if ( fVerbose ) + printf( " Found \n\n" ); + return 1; + } + else + { + if ( fVerbose ) + printf( " Not found \n\n" ); + return 0; + } +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyMulti8.c b/src/aig/ivy/ivyMulti8.c new file mode 100644 index 00000000..059d1500 --- /dev/null +++ b/src/aig/ivy/ivyMulti8.c @@ -0,0 +1,427 @@ +/**CFile**************************************************************** + + FileName [ivyMulti.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Constructing multi-input AND/EXOR gates.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyMulti.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Ivy_Eval_t_ Ivy_Eval_t; +struct Ivy_Eval_t_ +{ + unsigned Mask : 5; // the mask of covered nodes + unsigned Weight : 3; // the number of covered nodes + unsigned Cost : 4; // the number of overlapping nodes + unsigned Level : 12; // the level of this node + unsigned Fan0 : 4; // the first fanin + unsigned Fan1 : 4; // the second fanin +}; + +static Ivy_Obj_t * Ivy_MultiBuild_rec( Ivy_Eval_t * pEvals, int iNum, Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ); +static void Ivy_MultiSort( Ivy_Obj_t ** pArgs, int nArgs ); +static int Ivy_MultiPushUniqueOrderByLevel( Ivy_Obj_t ** pArray, int nArgs, Ivy_Obj_t * pNode ); +static Ivy_Obj_t * Ivy_MultiEval( Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ); + + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Constructs the well-balanced tree of gates.] + + Description [Disregards levels and possible logic sharing.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Multi_rec( Ivy_Obj_t ** ppObjs, int nObjs, Ivy_Type_t Type ) +{ + Ivy_Obj_t * pObj1, * pObj2; + if ( nObjs == 1 ) + return ppObjs[0]; + pObj1 = Ivy_Multi_rec( ppObjs, nObjs/2, Type ); + pObj2 = Ivy_Multi_rec( ppObjs + nObjs/2, nObjs - nObjs/2, Type ); + return Ivy_Oper( pObj1, pObj2, Type ); +} + +/**Function************************************************************* + + Synopsis [Constructs a balanced tree while taking sharing into account.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Multi( Ivy_Obj_t ** pArgsInit, int nArgs, Ivy_Type_t Type ) +{ + static char NumBits[32] = {0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5}; + static Ivy_Eval_t pEvals[15+15*14/2]; + static Ivy_Obj_t * pArgs[16]; + Ivy_Eval_t * pEva, * pEvaBest; + int nArgsNew, nEvals, i, k; + Ivy_Obj_t * pTemp; + + // consider the case of one argument + assert( nArgs > 0 ); + if ( nArgs == 1 ) + return pArgsInit[0]; + // consider the case of two arguments + if ( nArgs == 2 ) + return Ivy_Oper( pArgsInit[0], pArgsInit[1], Type ); + +//Ivy_MultiEval( pArgsInit, nArgs, Type ); printf( "\n" ); + + // set the initial ones + for ( i = 0; i < nArgs; i++ ) + { + pArgs[i] = pArgsInit[i]; + pEva = pEvals + i; + pEva->Mask = (1 << i); + pEva->Weight = 1; + pEva->Cost = 0; + pEva->Level = Ivy_Regular(pArgs[i])->Level; + pEva->Fan0 = 0; + pEva->Fan1 = 0; + } + + // find the available nodes + pEvaBest = pEvals; + nArgsNew = nArgs; + for ( i = 1; i < nArgsNew; i++ ) + for ( k = 0; k < i; k++ ) + if ( pTemp = Ivy_TableLookup(Ivy_ObjCreateGhost(pArgs[k], pArgs[i], Type, IVY_INIT_NONE)) ) + { + pEva = pEvals + nArgsNew; + pEva->Mask = pEvals[k].Mask | pEvals[i].Mask; + pEva->Weight = NumBits[pEva->Mask]; + pEva->Cost = pEvals[k].Cost + pEvals[i].Cost + NumBits[pEvals[k].Mask & pEvals[i].Mask]; + pEva->Level = 1 + IVY_MAX(pEvals[k].Level, pEvals[i].Level); + pEva->Fan0 = k; + pEva->Fan1 = i; +// assert( pEva->Level == (unsigned)Ivy_ObjLevel(pTemp) ); + // compare + if ( pEvaBest->Weight < pEva->Weight || + pEvaBest->Weight == pEva->Weight && pEvaBest->Cost > pEva->Cost || + pEvaBest->Weight == pEva->Weight && pEvaBest->Cost == pEva->Cost && pEvaBest->Level > pEva->Level ) + pEvaBest = pEva; + // save the argument + pArgs[nArgsNew++] = pTemp; + if ( nArgsNew == 15 ) + goto Outside; + } +Outside: + +// printf( "Best = %d.\n", pEvaBest - pEvals ); + + // the case of no common nodes + if ( nArgsNew == nArgs ) + { + Ivy_MultiSort( pArgs, nArgs ); + return Ivy_MultiBalance_rec( pArgs, nArgs, Type ); + } + // the case of one common node + if ( nArgsNew == nArgs + 1 ) + { + assert( pEvaBest - pEvals == nArgs ); + k = 0; + for ( i = 0; i < nArgs; i++ ) + if ( i != (int)pEvaBest->Fan0 && i != (int)pEvaBest->Fan1 ) + pArgs[k++] = pArgs[i]; + pArgs[k++] = pArgs[nArgs]; + assert( k == nArgs - 1 ); + nArgs = k; + Ivy_MultiSort( pArgs, nArgs ); + return Ivy_MultiBalance_rec( pArgs, nArgs, Type ); + } + // the case when there is a node that covers everything + if ( (int)pEvaBest->Mask == ((1 << nArgs) - 1) ) + return Ivy_MultiBuild_rec( pEvals, pEvaBest - pEvals, pArgs, nArgsNew, Type ); + + // evaluate node pairs + nEvals = nArgsNew; + for ( i = 1; i < nArgsNew; i++ ) + for ( k = 0; k < i; k++ ) + { + pEva = pEvals + nEvals; + pEva->Mask = pEvals[k].Mask | pEvals[i].Mask; + pEva->Weight = NumBits[pEva->Mask]; + pEva->Cost = pEvals[k].Cost + pEvals[i].Cost + NumBits[pEvals[k].Mask & pEvals[i].Mask]; + pEva->Level = 1 + IVY_MAX(pEvals[k].Level, pEvals[i].Level); + pEva->Fan0 = k; + pEva->Fan1 = i; + // compare + if ( pEvaBest->Weight < pEva->Weight || + pEvaBest->Weight == pEva->Weight && pEvaBest->Cost > pEva->Cost || + pEvaBest->Weight == pEva->Weight && pEvaBest->Cost == pEva->Cost && pEvaBest->Level > pEva->Level ) + pEvaBest = pEva; + // save the argument + nEvals++; + } + assert( pEvaBest - pEvals >= nArgsNew ); + +// printf( "Used (%d, %d).\n", pEvaBest->Fan0, pEvaBest->Fan1 ); + + // get the best implementation + pTemp = Ivy_MultiBuild_rec( pEvals, pEvaBest - pEvals, pArgs, nArgsNew, Type ); + + // collect those not covered by EvaBest + k = 0; + for ( i = 0; i < nArgs; i++ ) + if ( (pEvaBest->Mask & (1 << i)) == 0 ) + pArgs[k++] = pArgs[i]; + pArgs[k++] = pTemp; + assert( k == nArgs - (int)pEvaBest->Weight + 1 ); + nArgs = k; + Ivy_MultiSort( pArgs, nArgs ); + return Ivy_MultiBalance_rec( pArgs, nArgs, Type ); +} + +/**Function************************************************************* + + Synopsis [Implements multi-input AND/EXOR operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_MultiBuild_rec( Ivy_Eval_t * pEvals, int iNum, Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ) +{ + Ivy_Obj_t * pNode0, * pNode1; + if ( iNum < nArgs ) + return pArgs[iNum]; + pNode0 = Ivy_MultiBuild_rec( pEvals, pEvals[iNum].Fan0, pArgs, nArgs, Type ); + pNode1 = Ivy_MultiBuild_rec( pEvals, pEvals[iNum].Fan1, pArgs, nArgs, Type ); + return Ivy_Oper( pNode0, pNode1, Type ); +} + +/**Function************************************************************* + + Synopsis [Selection-sorts the nodes in the decreasing over of level.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_MultiSort( Ivy_Obj_t ** pArgs, int nArgs ) +{ + Ivy_Obj_t * pTemp; + int i, j, iBest; + + for ( i = 0; i < nArgs-1; i++ ) + { + iBest = i; + for ( j = i+1; j < nArgs; j++ ) + if ( Ivy_Regular(pArgs[j])->Level > Ivy_Regular(pArgs[iBest])->Level ) + iBest = j; + pTemp = pArgs[i]; + pArgs[i] = pArgs[iBest]; + pArgs[iBest] = pTemp; + } +} + +/**Function************************************************************* + + Synopsis [Inserts a new node in the order by levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_MultiPushUniqueOrderByLevel( Ivy_Obj_t ** pArray, int nArgs, Ivy_Obj_t * pNode ) +{ + Ivy_Obj_t * pNode1, * pNode2; + int i; + // try to find the node in the array + for ( i = 0; i < nArgs; i++ ) + if ( pArray[i] == pNode ) + return nArgs; + // put the node last + pArray[nArgs++] = pNode; + // find the place to put the new node + for ( i = nArgs-1; i > 0; i-- ) + { + pNode1 = pArray[i ]; + pNode2 = pArray[i-1]; + if ( Ivy_Regular(pNode1)->Level <= Ivy_Regular(pNode2)->Level ) + break; + pArray[i ] = pNode2; + pArray[i-1] = pNode1; + } + return nArgs; +} + +/**Function************************************************************* + + Synopsis [Balances the array recursively.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_MultiBalance_rec( Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ) +{ + Ivy_Obj_t * pNodeNew; + // consider the case of one argument + assert( nArgs > 0 ); + if ( nArgs == 1 ) + return pArgs[0]; + // consider the case of two arguments + if ( nArgs == 2 ) + return Ivy_Oper( pArgs[0], pArgs[1], Type ); + // get the last two nodes + pNodeNew = Ivy_Oper( pArgs[nArgs-1], pArgs[nArgs-2], Type ); + // add the new node + nArgs = Ivy_MultiPushUniqueOrderByLevel( pArgs, nArgs - 2, pNodeNew ); + return Ivy_MultiBalance_rec( pArgs, nArgs, Type ); +} + +/**Function************************************************************* + + Synopsis [Implements multi-input AND/EXOR operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_MultiEval( Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ) +{ + Ivy_Obj_t * pTemp; + int i, k; + int nArgsOld = nArgs; + for ( i = 0; i < nArgs; i++ ) + printf( "%d[%d] ", i, Ivy_Regular(pArgs[i])->Level ); + for ( i = 1; i < nArgs; i++ ) + for ( k = 0; k < i; k++ ) + { + pTemp = Ivy_TableLookup(Ivy_ObjCreateGhost(pArgs[k], pArgs[i], Type, IVY_INIT_NONE)); + if ( pTemp != NULL ) + { + printf( "%d[%d]=(%d,%d) ", nArgs, Ivy_Regular(pTemp)->Level, k, i ); + pArgs[nArgs++] = pTemp; + } + } + printf( " ((%d/%d)) ", nArgsOld, nArgs-nArgsOld ); + return NULL; +} + + + +/**Function************************************************************* + + Synopsis [Old code.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Multi1( Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ) +{ + Ivy_Obj_t * pArgsRef[5], * pTemp; + int i, k, m, nArgsNew, Counter = 0; + + +//Ivy_MultiEval( pArgs, nArgs, Type ); printf( "\n" ); + + + assert( Type == IVY_AND || Type == IVY_EXOR ); + assert( nArgs > 0 ); + if ( nArgs == 1 ) + return pArgs[0]; + + // find the nodes with more than one fanout + nArgsNew = 0; + for ( i = 0; i < nArgs; i++ ) + if ( Ivy_ObjRefs( Ivy_Regular(pArgs[i]) ) > 0 ) + pArgsRef[nArgsNew++] = pArgs[i]; + + // go through pairs + if ( nArgsNew >= 2 ) + for ( i = 0; i < nArgsNew; i++ ) + for ( k = i + 1; k < nArgsNew; k++ ) + if ( pTemp = Ivy_TableLookup(Ivy_ObjCreateGhost(pArgsRef[i], pArgsRef[k], Type, IVY_INIT_NONE)) ) + Counter++; +// printf( "%d", Counter ); + + // go through pairs + if ( nArgsNew >= 2 ) + for ( i = 0; i < nArgsNew; i++ ) + for ( k = i + 1; k < nArgsNew; k++ ) + if ( pTemp = Ivy_TableLookup(Ivy_ObjCreateGhost(pArgsRef[i], pArgsRef[k], Type, IVY_INIT_NONE)) ) + { + nArgsNew = 0; + for ( m = 0; m < nArgs; m++ ) + if ( pArgs[m] != pArgsRef[i] && pArgs[m] != pArgsRef[k] ) + pArgs[nArgsNew++] = pArgs[m]; + pArgs[nArgsNew++] = pTemp; + assert( nArgsNew == nArgs - 1 ); + return Ivy_Multi1( pArgs, nArgsNew, Type ); + } + return Ivy_Multi_rec( pArgs, nArgs, Type ); +} + +/**Function************************************************************* + + Synopsis [Old code.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Multi2( Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ) +{ + assert( Type == IVY_AND || Type == IVY_EXOR ); + assert( nArgs > 0 ); + return Ivy_Multi_rec( pArgs, nArgs, Type ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyObj.c b/src/aig/ivy/ivyObj.c new file mode 100644 index 00000000..59dda19c --- /dev/null +++ b/src/aig/ivy/ivyObj.c @@ -0,0 +1,476 @@ +/**CFile**************************************************************** + + FileName [ivyObj.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Adding/removing objects.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyObj.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Create the new node assuming it does not exist.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ObjCreatePi( Ivy_Man_t * p ) +{ + return Ivy_ObjCreate( p, Ivy_ObjCreateGhost(p, NULL, NULL, IVY_PI, IVY_INIT_NONE) ); +} + +/**Function************************************************************* + + Synopsis [Create the new node assuming it does not exist.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ObjCreatePo( Ivy_Man_t * p, Ivy_Obj_t * pDriver ) +{ + return Ivy_ObjCreate( p, Ivy_ObjCreateGhost(p, pDriver, NULL, IVY_PO, IVY_INIT_NONE) ); +} + +/**Function************************************************************* + + Synopsis [Create the new node assuming it does not exist.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ObjCreate( Ivy_Man_t * p, Ivy_Obj_t * pGhost ) +{ + Ivy_Obj_t * pObj; + assert( !Ivy_IsComplement(pGhost) ); + assert( Ivy_ObjIsGhost(pGhost) ); + assert( Ivy_TableLookup(p, pGhost) == NULL ); + // get memory for the new object + pObj = Ivy_ManFetchMemory( p ); + assert( Ivy_ObjIsNone(pObj) ); + pObj->Id = Vec_PtrSize(p->vObjs); + Vec_PtrPush( p->vObjs, pObj ); + // add basic info (fanins, compls, type, init) + pObj->Type = pGhost->Type; + pObj->Init = pGhost->Init; + // add connections + Ivy_ObjConnect( p, pObj, pGhost->pFanin0, pGhost->pFanin1 ); + // compute level + if ( Ivy_ObjIsNode(pObj) ) + pObj->Level = Ivy_ObjLevelNew(pObj); + else if ( Ivy_ObjIsLatch(pObj) ) + pObj->Level = 0; + else if ( Ivy_ObjIsOneFanin(pObj) ) + pObj->Level = Ivy_ObjFanin0(pObj)->Level; + else if ( !Ivy_ObjIsPi(pObj) ) + assert( 0 ); + // create phase + if ( Ivy_ObjIsNode(pObj) ) + pObj->fPhase = Ivy_ObjFaninPhase(Ivy_ObjChild0(pObj)) & Ivy_ObjFaninPhase(Ivy_ObjChild1(pObj)); + else if ( Ivy_ObjIsOneFanin(pObj) ) + pObj->fPhase = Ivy_ObjFaninPhase(Ivy_ObjChild0(pObj)); + // set the fail TFO flag + if ( Ivy_ObjIsNode(pObj) ) + pObj->fFailTfo = Ivy_ObjFanin0(pObj)->fFailTfo | Ivy_ObjFanin1(pObj)->fFailTfo; + // mark the fanins in a special way if the node is EXOR + if ( Ivy_ObjIsExor(pObj) ) + { + Ivy_ObjFanin0(pObj)->fExFan = 1; + Ivy_ObjFanin1(pObj)->fExFan = 1; + } + // add PIs/POs to the arrays + if ( Ivy_ObjIsPi(pObj) ) + Vec_PtrPush( p->vPis, pObj ); + else if ( Ivy_ObjIsPo(pObj) ) + Vec_PtrPush( p->vPos, pObj ); +// else if ( Ivy_ObjIsBuf(pObj) ) +// Vec_PtrPush( p->vBufs, pObj ); + if ( p->vRequired && Vec_IntSize(p->vRequired) <= pObj->Id ) + Vec_IntFillExtra( p->vRequired, 2 * Vec_IntSize(p->vRequired), 1000000 ); + // update node counters of the manager + p->nObjs[Ivy_ObjType(pObj)]++; + p->nCreated++; + +// printf( "Adding %sAIG node: ", p->pHaig==NULL? "H":" " ); +// Ivy_ObjPrintVerbose( p, pObj, p->pHaig==NULL ); +// printf( "\n" ); + + // if HAIG is defined, create a corresponding node + if ( p->pHaig ) + Ivy_ManHaigCreateObj( p, pObj ); + return pObj; +} + +/**Function************************************************************* + + Synopsis [Connect the object to the fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjConnect( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFan0, Ivy_Obj_t * pFan1 ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjIsPi(pObj) || Ivy_ObjIsOneFanin(pObj) || pFan1 != NULL ); + // add the first fanin + pObj->pFanin0 = pFan0; + pObj->pFanin1 = pFan1; + // increment references of the fanins and add their fanouts + if ( Ivy_ObjFanin0(pObj) != NULL ) + { + Ivy_ObjRefsInc( Ivy_ObjFanin0(pObj) ); + if ( p->fFanout ) + Ivy_ObjAddFanout( p, Ivy_ObjFanin0(pObj), pObj ); + } + if ( Ivy_ObjFanin1(pObj) != NULL ) + { + Ivy_ObjRefsInc( Ivy_ObjFanin1(pObj) ); + if ( p->fFanout ) + Ivy_ObjAddFanout( p, Ivy_ObjFanin1(pObj), pObj ); + } + // add the node to the structural hash table + Ivy_TableInsert( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Connect the object to the fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjDisconnect( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjIsPi(pObj) || Ivy_ObjIsOneFanin(pObj) || Ivy_ObjFanin1(pObj) != NULL ); + // remove connections + if ( pObj->pFanin0 != NULL ) + { + Ivy_ObjRefsDec(Ivy_ObjFanin0(pObj)); + if ( p->fFanout ) + Ivy_ObjDeleteFanout( p, Ivy_ObjFanin0(pObj), pObj ); + } + if ( pObj->pFanin1 != NULL ) + { + Ivy_ObjRefsDec(Ivy_ObjFanin1(pObj)); + if ( p->fFanout ) + Ivy_ObjDeleteFanout( p, Ivy_ObjFanin1(pObj), pObj ); + } + assert( pObj->pNextFan0 == NULL ); + assert( pObj->pNextFan1 == NULL ); + assert( pObj->pPrevFan0 == NULL ); + assert( pObj->pPrevFan1 == NULL ); + // remove the node from the structural hash table + Ivy_TableDelete( p, pObj ); + // add the first fanin + pObj->pFanin0 = NULL; + pObj->pFanin1 = NULL; +} + +/**Function************************************************************* + + Synopsis [Replaces the first fanin of the node by the new fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjPatchFanin0( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Obj_t * pFaninNew ) +{ + Ivy_Obj_t * pFaninOld; + assert( !Ivy_IsComplement(pObj) ); + pFaninOld = Ivy_ObjFanin0(pObj); + // decrement ref and remove fanout + Ivy_ObjRefsDec( pFaninOld ); + if ( p->fFanout ) + Ivy_ObjDeleteFanout( p, pFaninOld, pObj ); + // update the fanin + pObj->pFanin0 = pFaninNew; + // increment ref and add fanout + Ivy_ObjRefsInc( Ivy_Regular(pFaninNew) ); + if ( p->fFanout ) + Ivy_ObjAddFanout( p, Ivy_Regular(pFaninNew), pObj ); + // get rid of old fanin + if ( !Ivy_ObjIsPi(pFaninOld) && !Ivy_ObjIsConst1(pFaninOld) && Ivy_ObjRefs(pFaninOld) == 0 ) + Ivy_ObjDelete_rec( p, pFaninOld, 1 ); +} + +/**Function************************************************************* + + Synopsis [Deletes the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjDelete( Ivy_Man_t * p, Ivy_Obj_t * pObj, int fFreeTop ) +{ + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjRefs(pObj) == 0 || !fFreeTop ); + // update node counters of the manager + p->nObjs[pObj->Type]--; + p->nDeleted++; + // remove connections + Ivy_ObjDisconnect( p, pObj ); + // remove PIs/POs from the arrays + if ( Ivy_ObjIsPi(pObj) ) + Vec_PtrRemove( p->vPis, pObj ); + else if ( Ivy_ObjIsPo(pObj) ) + Vec_PtrRemove( p->vPos, pObj ); + else if ( p->fFanout && Ivy_ObjIsBuf(pObj) ) + Vec_PtrRemove( p->vBufs, pObj ); + // clean and recycle the entry + if ( fFreeTop ) + { + // free the node + Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL ); + Ivy_ManRecycleMemory( p, pObj ); + } + else + { + int nRefsOld = pObj->nRefs; + Ivy_Obj_t * pFanout = pObj->pFanout; + Ivy_ObjClean( pObj ); + pObj->pFanout = pFanout; + pObj->nRefs = nRefsOld; + } +} + +/**Function************************************************************* + + Synopsis [Deletes the MFFC of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjDelete_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, int fFreeTop ) +{ + Ivy_Obj_t * pFanin0, * pFanin1; + assert( !Ivy_IsComplement(pObj) ); + assert( !Ivy_ObjIsNone(pObj) ); + if ( Ivy_ObjIsConst1(pObj) || Ivy_ObjIsPi(pObj) ) + return; + pFanin0 = Ivy_ObjFanin0(pObj); + pFanin1 = Ivy_ObjFanin1(pObj); + Ivy_ObjDelete( p, pObj, fFreeTop ); + if ( pFanin0 && !Ivy_ObjIsNone(pFanin0) && Ivy_ObjRefs(pFanin0) == 0 ) + Ivy_ObjDelete_rec( p, pFanin0, 1 ); + if ( pFanin1 && !Ivy_ObjIsNone(pFanin1) && Ivy_ObjRefs(pFanin1) == 0 ) + Ivy_ObjDelete_rec( p, pFanin1, 1 ); +} + +/**Function************************************************************* + + Synopsis [Replaces one object by another.] + + Description [Both objects are currently in the manager. The new object + (pObjNew) should be used instead of the old object (pObjOld). If the + new object is complemented or used, the buffer is added.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjReplace( Ivy_Man_t * p, Ivy_Obj_t * pObjOld, Ivy_Obj_t * pObjNew, int fDeleteOld, int fFreeTop, int fUpdateLevel ) +{ + int nRefsOld;//, clk; + // the object to be replaced cannot be complemented + assert( !Ivy_IsComplement(pObjOld) ); + // the object to be replaced cannot be a terminal + assert( Ivy_ObjIsNone(pObjOld) || !Ivy_ObjIsPi(pObjOld) ); + // the object to be used cannot be a PO or assert + assert( !Ivy_ObjIsBuf(Ivy_Regular(pObjNew)) ); + // the object cannot be the same + assert( pObjOld != Ivy_Regular(pObjNew) ); +//printf( "Replacing %d by %d.\n", Ivy_Regular(pObjOld)->Id, Ivy_Regular(pObjNew)->Id ); + + // if HAIG is defined, create the choice node + if ( p->pHaig ) + { +// if ( pObjOld->Id == 31 ) +// { +// Ivy_ManShow( p, 0 ); +// Ivy_ManShow( p->pHaig, 1 ); +// } + Ivy_ManHaigCreateChoice( p, pObjOld, pObjNew ); + } + // if the new object is complemented or already used, add the buffer + if ( Ivy_IsComplement(pObjNew) || Ivy_ObjIsLatch(pObjNew) || Ivy_ObjRefs(pObjNew) > 0 || Ivy_ObjIsPi(pObjNew) || Ivy_ObjIsConst1(pObjNew) ) + pObjNew = Ivy_ObjCreate( p, Ivy_ObjCreateGhost(p, pObjNew, NULL, IVY_BUF, IVY_INIT_NONE) ); + assert( !Ivy_IsComplement(pObjNew) ); + if ( fUpdateLevel ) + { +//clk = clock(); + // if the new node's arrival time is different, recursively update arrival time of the fanouts + if ( p->fFanout && !Ivy_ObjIsBuf(pObjNew) && pObjOld->Level != pObjNew->Level ) + { + assert( Ivy_ObjIsNode(pObjOld) ); + pObjOld->Level = pObjNew->Level; + Ivy_ObjUpdateLevel_rec( p, pObjOld ); + } +//p->time1 += clock() - clk; + // if the new node's required time has changed, recursively update required time of the fanins +//clk = clock(); + if ( p->vRequired ) + { + int ReqNew = Vec_IntEntry(p->vRequired, pObjOld->Id); + if ( ReqNew < Vec_IntEntry(p->vRequired, pObjNew->Id) ) + { + Vec_IntWriteEntry( p->vRequired, pObjNew->Id, ReqNew ); + Ivy_ObjUpdateLevelR_rec( p, pObjNew, ReqNew ); + } + } +//p->time2 += clock() - clk; + } + // delete the old object + if ( fDeleteOld ) + Ivy_ObjDelete_rec( p, pObjOld, fFreeTop ); + // make sure object is not pointing to itself + assert( Ivy_ObjFanin0(pObjNew) == NULL || pObjOld != Ivy_ObjFanin0(pObjNew) ); + assert( Ivy_ObjFanin1(pObjNew) == NULL || pObjOld != Ivy_ObjFanin1(pObjNew) ); + // make sure the old node has no fanin fanout pointers + if ( p->fFanout ) + { + assert( pObjOld->pFanout != NULL ); + assert( pObjNew->pFanout == NULL ); + pObjNew->pFanout = pObjOld->pFanout; + } + // transfer the old object + assert( Ivy_ObjRefs(pObjNew) == 0 ); + nRefsOld = pObjOld->nRefs; + Ivy_ObjOverwrite( pObjOld, pObjNew ); + pObjOld->nRefs = nRefsOld; + // patch the fanout of the fanins + if ( p->fFanout ) + { + Ivy_ObjPatchFanout( p, Ivy_ObjFanin0(pObjOld), pObjNew, pObjOld ); + if ( Ivy_ObjFanin1(pObjOld) ) + Ivy_ObjPatchFanout( p, Ivy_ObjFanin1(pObjOld), pObjNew, pObjOld ); + } + // update the hash table + Ivy_TableUpdate( p, pObjNew, pObjOld->Id ); + // recycle the object that was taken over by pObjOld + Vec_PtrWriteEntry( p->vObjs, pObjNew->Id, NULL ); + Ivy_ManRecycleMemory( p, pObjNew ); + // if the new node is the buffer propagate it + if ( p->fFanout && Ivy_ObjIsBuf(pObjOld) ) + Vec_PtrPush( p->vBufs, pObjOld ); +// Ivy_ManCheckFanouts( p ); +// printf( "\n" ); +/* + if ( p->pHaig ) + { + int x; + Ivy_ManShow( p, 0, NULL ); + Ivy_ManShow( p->pHaig, 1, NULL ); + x = 0; + } +*/ +// if ( Ivy_ManCheckFanoutNums(p) ) +// { +// int x = 0; +// } +} + +/**Function************************************************************* + + Synopsis [Fixes buffer fanins.] + + Description [This situation happens because NodeReplace is a lazy + procedure, which does not propagate the change to the fanouts but + instead records the change in the form of a buf/inv node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_NodeFixBufferFanins( Ivy_Man_t * p, Ivy_Obj_t * pNode, int fUpdateLevel ) +{ + Ivy_Obj_t * pFanReal0, * pFanReal1, * pResult; + if ( Ivy_ObjIsPo(pNode) ) + { + if ( !Ivy_ObjIsBuf(Ivy_ObjFanin0(pNode)) ) + return; + pFanReal0 = Ivy_ObjReal( Ivy_ObjChild0(pNode) ); + Ivy_ObjPatchFanin0( p, pNode, pFanReal0 ); +// Ivy_ManCheckFanouts( p ); + return; + } + if ( !Ivy_ObjIsBuf(Ivy_ObjFanin0(pNode)) && !Ivy_ObjIsBuf(Ivy_ObjFanin1(pNode)) ) + return; + // get the real fanins + pFanReal0 = Ivy_ObjReal( Ivy_ObjChild0(pNode) ); + pFanReal1 = Ivy_ObjReal( Ivy_ObjChild1(pNode) ); + // get the new node + if ( Ivy_ObjIsNode(pNode) ) + pResult = Ivy_Oper( p, pFanReal0, pFanReal1, Ivy_ObjType(pNode) ); + else if ( Ivy_ObjIsLatch(pNode) ) + pResult = Ivy_Latch( p, pFanReal0, Ivy_ObjInit(pNode) ); + else + assert( 0 ); + +//printf( "===== Replacing %d by %d.\n", pNode->Id, pResult->Id ); +//Ivy_ObjPrintVerbose( p, pNode, 0 ); printf( "\n" ); +//Ivy_ObjPrintVerbose( p, pResult, 0 ); printf( "\n" ); + + // perform the replacement + Ivy_ObjReplace( p, pNode, pResult, 1, 0, fUpdateLevel ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyOper.c b/src/aig/ivy/ivyOper.c new file mode 100644 index 00000000..8115ce4f --- /dev/null +++ b/src/aig/ivy/ivyOper.c @@ -0,0 +1,293 @@ +/**CFile**************************************************************** + + FileName [ivyOper.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [AIG operations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyOper.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// procedure to detect an EXOR gate +static inline int Ivy_ObjIsExorType( Ivy_Obj_t * p0, Ivy_Obj_t * p1, Ivy_Obj_t ** ppFan0, Ivy_Obj_t ** ppFan1 ) +{ + if ( !Ivy_IsComplement(p0) || !Ivy_IsComplement(p1) ) + return 0; + p0 = Ivy_Regular(p0); + p1 = Ivy_Regular(p1); + if ( !Ivy_ObjIsAnd(p0) || !Ivy_ObjIsAnd(p1) ) + return 0; + if ( Ivy_ObjFanin0(p0) != Ivy_ObjFanin0(p1) || Ivy_ObjFanin1(p0) != Ivy_ObjFanin1(p1) ) + return 0; + if ( Ivy_ObjFaninC0(p0) == Ivy_ObjFaninC0(p1) || Ivy_ObjFaninC1(p0) == Ivy_ObjFaninC1(p1) ) + return 0; + *ppFan0 = Ivy_ObjChild0(p0); + *ppFan1 = Ivy_ObjChild1(p0); + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Perform one operation.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Oper( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1, Ivy_Type_t Type ) +{ + if ( Type == IVY_AND ) + return Ivy_And( p, p0, p1 ); + if ( Type == IVY_EXOR ) + return Ivy_Exor( p, p0, p1 ); + assert( 0 ); + return NULL; +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_And( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ) +{ +// Ivy_Obj_t * pFan0, * pFan1; + // check trivial cases + if ( p0 == p1 ) + return p0; + if ( p0 == Ivy_Not(p1) ) + return Ivy_Not(p->pConst1); + if ( Ivy_Regular(p0) == p->pConst1 ) + return p0 == p->pConst1 ? p1 : Ivy_Not(p->pConst1); + if ( Ivy_Regular(p1) == p->pConst1 ) + return p1 == p->pConst1 ? p0 : Ivy_Not(p->pConst1); + // check if it can be an EXOR gate +// if ( Ivy_ObjIsExorType( p0, p1, &pFan0, &pFan1 ) ) +// return Ivy_CanonExor( pFan0, pFan1 ); + return Ivy_CanonAnd( p, p0, p1 ); +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [The argument nodes can be complemented.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Exor( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ) +{ +/* + // check trivial cases + if ( p0 == p1 ) + return Ivy_Not(p->pConst1); + if ( p0 == Ivy_Not(p1) ) + return p->pConst1; + if ( Ivy_Regular(p0) == p->pConst1 ) + return Ivy_NotCond( p1, p0 == p->pConst1 ); + if ( Ivy_Regular(p1) == p->pConst1 ) + return Ivy_NotCond( p0, p1 == p->pConst1 ); + // check the table + return Ivy_CanonExor( p, p0, p1 ); +*/ + return Ivy_Or( p, Ivy_And(p, p0, Ivy_Not(p1)), Ivy_And(p, Ivy_Not(p0), p1) ); +} + +/**Function************************************************************* + + Synopsis [Implements Boolean OR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Or( Ivy_Man_t * p, Ivy_Obj_t * p0, Ivy_Obj_t * p1 ) +{ + return Ivy_Not( Ivy_And( p, Ivy_Not(p0), Ivy_Not(p1) ) ); +} + +/**Function************************************************************* + + Synopsis [Implements ITE operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Mux( Ivy_Man_t * p, Ivy_Obj_t * pC, Ivy_Obj_t * p1, Ivy_Obj_t * p0 ) +{ + Ivy_Obj_t * pTempA1, * pTempA2, * pTempB1, * pTempB2, * pTemp; + int Count0, Count1; + // consider trivial cases + if ( p0 == Ivy_Not(p1) ) + return Ivy_Exor( p, pC, p0 ); + // other cases can be added + // implement the first MUX (F = C * x1 + C' * x0) + pTempA1 = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, pC, p1, IVY_AND, IVY_INIT_NONE) ); + pTempA2 = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, Ivy_Not(pC), p0, IVY_AND, IVY_INIT_NONE) ); + if ( pTempA1 && pTempA2 ) + { + pTemp = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, Ivy_Not(pTempA1), Ivy_Not(pTempA2), IVY_AND, IVY_INIT_NONE) ); + if ( pTemp ) return Ivy_Not(pTemp); + } + Count0 = (pTempA1 != NULL) + (pTempA2 != NULL); + // implement the second MUX (F' = C * x1' + C' * x0') + pTempB1 = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, pC, Ivy_Not(p1), IVY_AND, IVY_INIT_NONE) ); + pTempB2 = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, Ivy_Not(pC), Ivy_Not(p0), IVY_AND, IVY_INIT_NONE) ); + if ( pTempB1 && pTempB2 ) + { + pTemp = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, Ivy_Not(pTempB1), Ivy_Not(pTempB2), IVY_AND, IVY_INIT_NONE) ); + if ( pTemp ) return pTemp; + } + Count1 = (pTempB1 != NULL) + (pTempB2 != NULL); + // compare and decide which one to implement + if ( Count0 >= Count1 ) + { + pTempA1 = pTempA1? pTempA1 : Ivy_And(p, pC, p1); + pTempA2 = pTempA2? pTempA2 : Ivy_And(p, Ivy_Not(pC), p0); + return Ivy_Or( p, pTempA1, pTempA2 ); + } + pTempB1 = pTempB1? pTempB1 : Ivy_And(p, pC, Ivy_Not(p1)); + pTempB2 = pTempB2? pTempB2 : Ivy_And(p, Ivy_Not(pC), Ivy_Not(p0)); + return Ivy_Not( Ivy_Or( p, pTempB1, pTempB2 ) ); + +// return Ivy_Or( Ivy_And(pC, p1), Ivy_And(Ivy_Not(pC), p0) ); +} + +/**Function************************************************************* + + Synopsis [Implements ITE operation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Maj( Ivy_Man_t * p, Ivy_Obj_t * pA, Ivy_Obj_t * pB, Ivy_Obj_t * pC ) +{ + return Ivy_Or( p, Ivy_Or(p, Ivy_And(p, pA, pB), Ivy_And(p, pA, pC)), Ivy_And(p, pB, pC) ); +} + +/**Function************************************************************* + + Synopsis [Constructs the well-balanced tree of gates.] + + Description [Disregards levels and possible logic sharing.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Multi_rec( Ivy_Man_t * p, Ivy_Obj_t ** ppObjs, int nObjs, Ivy_Type_t Type ) +{ + Ivy_Obj_t * pObj1, * pObj2; + if ( nObjs == 1 ) + return ppObjs[0]; + pObj1 = Ivy_Multi_rec( p, ppObjs, nObjs/2, Type ); + pObj2 = Ivy_Multi_rec( p, ppObjs + nObjs/2, nObjs - nObjs/2, Type ); + return Ivy_Oper( p, pObj1, pObj2, Type ); +} + +/**Function************************************************************* + + Synopsis [Old code.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Multi( Ivy_Man_t * p, Ivy_Obj_t ** pArgs, int nArgs, Ivy_Type_t Type ) +{ + assert( Type == IVY_AND || Type == IVY_EXOR ); + assert( nArgs > 0 ); + return Ivy_Multi_rec( p, pArgs, nArgs, Type ); +} + +/**Function************************************************************* + + Synopsis [Implements the miter.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Miter( Ivy_Man_t * p, Vec_Ptr_t * vPairs ) +{ + int i; + assert( vPairs->nSize > 0 ); + assert( vPairs->nSize % 2 == 0 ); + // go through the cubes of the node's SOP + for ( i = 0; i < vPairs->nSize; i += 2 ) + vPairs->pArray[i/2] = Ivy_Not( Ivy_Exor( p, vPairs->pArray[i], vPairs->pArray[i+1] ) ); + vPairs->nSize = vPairs->nSize/2; + return Ivy_Not( Ivy_Multi_rec( p, (Ivy_Obj_t **)vPairs->pArray, vPairs->nSize, IVY_AND ) ); +} + +/**Function************************************************************* + + Synopsis [Performs canonicization step.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_Latch( Ivy_Man_t * p, Ivy_Obj_t * pObj, Ivy_Init_t Init ) +{ + return Ivy_CanonLatch( p, pObj, Init ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyResyn.c b/src/aig/ivy/ivyResyn.c new file mode 100644 index 00000000..f42d7464 --- /dev/null +++ b/src/aig/ivy/ivyResyn.c @@ -0,0 +1,196 @@ +/**CFile**************************************************************** + + FileName [ivyResyn.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [AIG rewriting script.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyResyn.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs several passes of rewriting on the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManResyn0( Ivy_Man_t * pMan, int fUpdateLevel, int fVerbose ) +{ + int clk; + Ivy_Man_t * pTemp; + +if ( fVerbose ) { printf( "Original:\n" ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pMan, fUpdateLevel ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +// Ivy_ManRewriteAlg( pMan, fUpdateLevel, 0 ); +clk = clock(); + Ivy_ManRewritePre( pMan, fUpdateLevel, 0, 0 ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Rewrite", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pTemp = pMan, fUpdateLevel ); + Ivy_ManStop( pTemp ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + return pMan; +} + +/**Function************************************************************* + + Synopsis [Performs several passes of rewriting on the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManResyn( Ivy_Man_t * pMan, int fUpdateLevel, int fVerbose ) +{ + int clk; + Ivy_Man_t * pTemp; + +if ( fVerbose ) { printf( "Original:\n" ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pMan, fUpdateLevel ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +// Ivy_ManRewriteAlg( pMan, fUpdateLevel, 0 ); +clk = clock(); + Ivy_ManRewritePre( pMan, fUpdateLevel, 0, 0 ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Rewrite", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pTemp = pMan, fUpdateLevel ); + Ivy_ManStop( pTemp ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +// Ivy_ManRewriteAlg( pMan, fUpdateLevel, 1 ); +clk = clock(); + Ivy_ManRewritePre( pMan, fUpdateLevel, 1, 0 ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Rewrite", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pTemp = pMan, fUpdateLevel ); + Ivy_ManStop( pTemp ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +// Ivy_ManRewriteAlg( pMan, fUpdateLevel, 1 ); +clk = clock(); + Ivy_ManRewritePre( pMan, fUpdateLevel, 1, 0 ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Rewrite", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pTemp = pMan, fUpdateLevel ); + Ivy_ManStop( pTemp ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + return pMan; +} + +/**Function************************************************************* + + Synopsis [Performs several passes of rewriting on the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Man_t * Ivy_ManRwsat( Ivy_Man_t * pMan, int fVerbose ) +{ + int clk; + Ivy_Man_t * pTemp; + +if ( fVerbose ) { printf( "Original:\n" ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + Ivy_ManRewritePre( pMan, 0, 0, 0 ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Rewrite", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pTemp = pMan, 0 ); +// pMan = Ivy_ManDup( pTemp = pMan ); + Ivy_ManStop( pTemp ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +/* +clk = clock(); + Ivy_ManRewritePre( pMan, 0, 0, 0 ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Rewrite", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); + +clk = clock(); + pMan = Ivy_ManBalance( pTemp = pMan, 0 ); + Ivy_ManStop( pTemp ); +if ( fVerbose ) { printf( "\n" ); } +if ( fVerbose ) { PRT( "Balance", clock() - clk ); } +if ( fVerbose ) Ivy_ManPrintStats( pMan ); +*/ + return pMan; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyRwr.c b/src/aig/ivy/ivyRwr.c new file mode 100644 index 00000000..3f8720ba --- /dev/null +++ b/src/aig/ivy/ivyRwr.c @@ -0,0 +1,609 @@ +/**CFile**************************************************************** + + FileName [ivyRwt.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Rewriting based on precomputation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyRwt.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" +#include "deco.h" +#include "rwt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static unsigned Ivy_NodeGetTruth( Ivy_Obj_t * pObj, int * pNums, int nNums ); +static int Ivy_NodeRewrite( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pNode, int fUpdateLevel, int fUseZeroCost ); +static Dec_Graph_t * Rwt_CutEvaluate( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pRoot, + Vec_Ptr_t * vFaninsCur, int nNodesSaved, int LevelMax, int * pGainBest, unsigned uTruth ); + +static int Ivy_GraphToNetworkCount( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int NodeMax, int LevelMax ); +static void Ivy_GraphUpdateNetwork( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int fUpdateLevel, int nGain ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs incremental rewriting of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManRewritePre( Ivy_Man_t * p, int fUpdateLevel, int fUseZeroCost, int fVerbose ) +{ + Rwt_Man_t * pManRwt; + Ivy_Obj_t * pNode; + int i, nNodes, nGain; + int clk, clkStart = clock(); + // start the rewriting manager + pManRwt = Rwt_ManStart( 0 ); + p->pData = pManRwt; + if ( pManRwt == NULL ) + return 0; + // create fanouts + if ( fUpdateLevel && p->fFanout == 0 ) + Ivy_ManStartFanout( p ); + // compute the reverse levels if level update is requested + if ( fUpdateLevel ) + Ivy_ManRequiredLevels( p ); + // set the number of levels +// p->nLevelMax = Ivy_ManLevels( p ); + // resynthesize each node once + nNodes = Ivy_ManObjIdMax(p); + Ivy_ManForEachNode( p, pNode, i ) + { + // fix the fanin buffer problem + Ivy_NodeFixBufferFanins( p, pNode, 1 ); + if ( Ivy_ObjIsBuf(pNode) ) + continue; + // stop if all nodes have been tried once + if ( i > nNodes ) + break; + // for each cut, try to resynthesize it + nGain = Ivy_NodeRewrite( p, pManRwt, pNode, fUpdateLevel, fUseZeroCost ); + if ( nGain > 0 || nGain == 0 && fUseZeroCost ) + { + Dec_Graph_t * pGraph = Rwt_ManReadDecs(pManRwt); + int fCompl = Rwt_ManReadCompl(pManRwt); +/* + { + Ivy_Obj_t * pObj; + int i; + printf( "USING: (" ); + Vec_PtrForEachEntry( Rwt_ManReadLeaves(pManRwt), pObj, i ) + printf( "%d ", Ivy_ObjFanoutNum(Ivy_Regular(pObj)) ); + printf( ") Gain = %d.\n", nGain ); + } + if ( nGain > 0 ) + { // print stats on the MFFC + extern void Ivy_NodeMffsConeSuppPrint( Ivy_Obj_t * pNode ); + printf( "Node %6d : Gain = %4d ", pNode->Id, nGain ); + Ivy_NodeMffsConeSuppPrint( pNode ); + } +*/ + // complement the FF if needed +clk = clock(); + if ( fCompl ) Dec_GraphComplement( pGraph ); + Ivy_GraphUpdateNetwork( p, pNode, pGraph, fUpdateLevel, nGain ); + if ( fCompl ) Dec_GraphComplement( pGraph ); +Rwt_ManAddTimeUpdate( pManRwt, clock() - clk ); + } + } +Rwt_ManAddTimeTotal( pManRwt, clock() - clkStart ); + // print stats + if ( fVerbose ) + Rwt_ManPrintStats( pManRwt ); + // delete the managers + Rwt_ManStop( pManRwt ); + p->pData = NULL; + // fix the levels + if ( fUpdateLevel ) + Vec_IntFree( p->vRequired ), p->vRequired = NULL; + else + Ivy_ManResetLevels( p ); + // check + if ( i = Ivy_ManCleanup(p) ) + printf( "Cleanup after rewriting removed %d dangling nodes.\n", i ); + if ( !Ivy_ManCheck(p) ) + printf( "Ivy_ManRewritePre(): The check has failed.\n" ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Performs rewriting for one node.] + + Description [This procedure considers all the cuts computed for the node + and tries to rewrite each of them using the "forest" of different AIG + structures precomputed and stored in the RWR manager. + Determines the best rewriting and computes the gain in the number of AIG + nodes in the final network. In the end, p->vFanins contains information + about the best cut that can be used for rewriting, while p->pGraph gives + the decomposition dag (represented using decomposition graph data structure). + Returns gain in the number of nodes or -1 if node cannot be rewritten.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeRewrite( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pNode, int fUpdateLevel, int fUseZeroCost ) +{ + int fVeryVerbose = 0; + Dec_Graph_t * pGraph; + Ivy_Store_t * pStore; + Ivy_Cut_t * pCut; + Ivy_Obj_t * pFanin; + unsigned uPhase, uTruthBest, uTruth; + char * pPerm; + int Required, nNodesSaved, nNodesSaveCur; + int i, c, GainCur, GainBest = -1; + int clk, clk2; + + p->nNodesConsidered++; + // get the required times + Required = fUpdateLevel? Vec_IntEntry( pMan->vRequired, pNode->Id ) : 1000000; + // get the node's cuts +clk = clock(); + pStore = Ivy_NodeFindCutsAll( pMan, pNode, 5 ); +p->timeCut += clock() - clk; + + // go through the cuts +clk = clock(); + for ( c = 1; c < pStore->nCuts; c++ ) + { + pCut = pStore->pCuts + c; + // consider only 4-input cuts + if ( pCut->nSize != 4 ) + continue; + // skip the cuts with buffers + for ( i = 0; i < (int)pCut->nSize; i++ ) + if ( Ivy_ObjIsBuf( Ivy_ManObj(pMan, pCut->pArray[i]) ) ) + break; + if ( i != pCut->nSize ) + { + p->nCutsBad++; + continue; + } + p->nCutsGood++; + // get the fanin permutation +clk2 = clock(); + uTruth = 0xFFFF & Ivy_NodeGetTruth( pNode, pCut->pArray, pCut->nSize ); // truth table +p->timeTruth += clock() - clk2; + pPerm = p->pPerms4[ p->pPerms[uTruth] ]; + uPhase = p->pPhases[uTruth]; + // collect fanins with the corresponding permutation/phase + Vec_PtrClear( p->vFaninsCur ); + Vec_PtrFill( p->vFaninsCur, (int)pCut->nSize, 0 ); + for ( i = 0; i < (int)pCut->nSize; i++ ) + { + pFanin = Ivy_ManObj( pMan, pCut->pArray[pPerm[i]] ); + assert( Ivy_ObjIsNode(pFanin) || Ivy_ObjIsCi(pFanin) ); + pFanin = Ivy_NotCond(pFanin, ((uPhase & (1<<i)) > 0) ); + Vec_PtrWriteEntry( p->vFaninsCur, i, pFanin ); + } +clk2 = clock(); +/* + printf( "Considering: (" ); + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + printf( "%d ", Ivy_ObjFanoutNum(Ivy_Regular(pFanin)) ); + printf( ")\n" ); +*/ + // mark the fanin boundary + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + Ivy_ObjRefsInc( Ivy_Regular(pFanin) ); + // label MFFC with current ID + Ivy_ManIncrementTravId( pMan ); + nNodesSaved = Ivy_ObjMffcLabel( pMan, pNode ); + // unmark the fanin boundary + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + Ivy_ObjRefsDec( Ivy_Regular(pFanin) ); +p->timeMffc += clock() - clk2; + + // evaluate the cut +clk2 = clock(); + pGraph = Rwt_CutEvaluate( pMan, p, pNode, p->vFaninsCur, nNodesSaved, Required, &GainCur, uTruth ); +p->timeEval += clock() - clk2; + + // check if the cut is better than the current best one + if ( pGraph != NULL && GainBest < GainCur ) + { + // save this form + nNodesSaveCur = nNodesSaved; + GainBest = GainCur; + p->pGraph = pGraph; + p->fCompl = ((uPhase & (1<<4)) > 0); + uTruthBest = uTruth; + // collect fanins in the + Vec_PtrClear( p->vFanins ); + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + Vec_PtrPush( p->vFanins, pFanin ); + } + } +p->timeRes += clock() - clk; + + if ( GainBest == -1 ) + return -1; + +// printf( "%d", nNodesSaveCur - GainBest ); +/* + if ( GainBest > 0 ) + { + if ( Rwt_CutIsintean( pNode, p->vFanins ) ) + printf( "b" ); + else + { + printf( "Node %d : ", pNode->Id ); + Vec_PtrForEachEntry( p->vFanins, pFanin, i ) + printf( "%d ", Ivy_Regular(pFanin)->Id ); + printf( "a" ); + } + } +*/ +/* + if ( GainBest > 0 ) + if ( p->fCompl ) + printf( "c" ); + else + printf( "." ); +*/ + + // copy the leaves + Vec_PtrForEachEntry( p->vFanins, pFanin, i ) + Dec_GraphNode(p->pGraph, i)->pFunc = pFanin; + + p->nScores[p->pMap[uTruthBest]]++; + p->nNodesGained += GainBest; + if ( fUseZeroCost || GainBest > 0 ) + p->nNodesRewritten++; + + // report the progress + if ( fVeryVerbose && GainBest > 0 ) + { + printf( "Node %6d : ", Ivy_ObjId(pNode) ); + printf( "Fanins = %d. ", p->vFanins->nSize ); + printf( "Save = %d. ", nNodesSaveCur ); + printf( "Add = %d. ", nNodesSaveCur-GainBest ); + printf( "GAIN = %d. ", GainBest ); + printf( "Cone = %d. ", p->pGraph? Dec_GraphNodeNum(p->pGraph) : 0 ); + printf( "Class = %d. ", p->pMap[uTruthBest] ); + printf( "\n" ); + } + return GainBest; +} + +/**Function************************************************************* + + Synopsis [Computes the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_NodeGetTruth_rec( Ivy_Obj_t * pObj, int * pNums, int nNums ) +{ + static unsigned uMasks[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 }; + unsigned uTruth0, uTruth1; + int i; + for ( i = 0; i < nNums; i++ ) + if ( pObj->Id == pNums[i] ) + return uMasks[i]; + assert( Ivy_ObjIsNode(pObj) || Ivy_ObjIsBuf(pObj) ); + uTruth0 = Ivy_NodeGetTruth_rec( Ivy_ObjFanin0(pObj), pNums, nNums ); + if ( Ivy_ObjFaninC0(pObj) ) + uTruth0 = ~uTruth0; + if ( Ivy_ObjIsBuf(pObj) ) + return uTruth0; + uTruth1 = Ivy_NodeGetTruth_rec( Ivy_ObjFanin1(pObj), pNums, nNums ); + if ( Ivy_ObjFaninC1(pObj) ) + uTruth1 = ~uTruth1; + return uTruth0 & uTruth1; +} + + +/**Function************************************************************* + + Synopsis [Computes the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_NodeGetTruth( Ivy_Obj_t * pObj, int * pNums, int nNums ) +{ + assert( nNums < 6 ); + return Ivy_NodeGetTruth_rec( pObj, pNums, nNums ); +} + +/**Function************************************************************* + + Synopsis [Evaluates the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dec_Graph_t * Rwt_CutEvaluate( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pRoot, Vec_Ptr_t * vFaninsCur, int nNodesSaved, int LevelMax, int * pGainBest, unsigned uTruth ) +{ + Vec_Ptr_t * vSubgraphs; + Dec_Graph_t * pGraphBest, * pGraphCur; + Rwt_Node_t * pNode, * pFanin; + int nNodesAdded, GainBest, i, k; + // find the matching class of subgraphs + vSubgraphs = Vec_VecEntry( p->vClasses, p->pMap[uTruth] ); + p->nSubgraphs += vSubgraphs->nSize; + // determine the best subgraph + GainBest = -1; + Vec_PtrForEachEntry( vSubgraphs, pNode, i ) + { + // get the current graph + pGraphCur = (Dec_Graph_t *)pNode->pNext; + // copy the leaves + Vec_PtrForEachEntry( vFaninsCur, pFanin, k ) + Dec_GraphNode(pGraphCur, k)->pFunc = pFanin; + // detect how many unlabeled nodes will be reused + nNodesAdded = Ivy_GraphToNetworkCount( pMan, pRoot, pGraphCur, nNodesSaved, LevelMax ); + if ( nNodesAdded == -1 ) + continue; + assert( nNodesSaved >= nNodesAdded ); + // count the gain at this node + if ( GainBest < nNodesSaved - nNodesAdded ) + { + GainBest = nNodesSaved - nNodesAdded; + pGraphBest = pGraphCur; + } + } + if ( GainBest == -1 ) + return NULL; + *pGainBest = GainBest; + return pGraphBest; +} + + +/**Function************************************************************* + + Synopsis [Counts the number of new nodes added when using this graph.] + + Description [AIG nodes for the fanins should be assigned to pNode->pFunc + of the leaves of the graph before calling this procedure. + Returns -1 if the number of nodes and levels exceeded the given limit or + the number of levels exceeded the maximum allowed level.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_GraphToNetworkCount( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int NodeMax, int LevelMax ) +{ + Dec_Node_t * pNode, * pNode0, * pNode1; + Ivy_Obj_t * pAnd, * pAnd0, * pAnd1; + int i, Counter, LevelNew, LevelOld; + // check for constant function or a literal + if ( Dec_GraphIsConst(pGraph) || Dec_GraphIsVar(pGraph) ) + return 0; + // set the levels of the leaves + Dec_GraphForEachLeaf( pGraph, pNode, i ) + pNode->Level = Ivy_Regular(pNode->pFunc)->Level; + // compute the AIG size after adding the internal nodes + Counter = 0; + Dec_GraphForEachNode( pGraph, pNode, i ) + { + // get the children of this node + pNode0 = Dec_GraphNode( pGraph, pNode->eEdge0.Node ); + pNode1 = Dec_GraphNode( pGraph, pNode->eEdge1.Node ); + // get the AIG nodes corresponding to the children + pAnd0 = pNode0->pFunc; + pAnd1 = pNode1->pFunc; + if ( pAnd0 && pAnd1 ) + { + // if they are both present, find the resulting node + pAnd0 = Ivy_NotCond( pAnd0, pNode->eEdge0.fCompl ); + pAnd1 = Ivy_NotCond( pAnd1, pNode->eEdge1.fCompl ); + pAnd = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, pAnd0, pAnd1, IVY_AND, IVY_INIT_NONE) ); + // return -1 if the node is the same as the original root + if ( Ivy_Regular(pAnd) == pRoot ) + return -1; + } + else + pAnd = NULL; + // count the number of added nodes + if ( pAnd == NULL || Ivy_ObjIsTravIdCurrent(p, Ivy_Regular(pAnd)) ) + { + if ( ++Counter > NodeMax ) + return -1; + } + // count the number of new levels + LevelNew = 1 + RWT_MAX( pNode0->Level, pNode1->Level ); + if ( pAnd ) + { + if ( Ivy_Regular(pAnd) == p->pConst1 ) + LevelNew = 0; + else if ( Ivy_Regular(pAnd) == Ivy_Regular(pAnd0) ) + LevelNew = (int)Ivy_Regular(pAnd0)->Level; + else if ( Ivy_Regular(pAnd) == Ivy_Regular(pAnd1) ) + LevelNew = (int)Ivy_Regular(pAnd1)->Level; + LevelOld = (int)Ivy_Regular(pAnd)->Level; +// assert( LevelNew == LevelOld ); + } + if ( LevelNew > LevelMax ) + return -1; + pNode->pFunc = pAnd; + pNode->Level = LevelNew; + } + return Counter; +} + +/**Function************************************************************* + + Synopsis [Transforms the decomposition graph into the AIG.] + + Description [AIG nodes for the fanins should be assigned to pNode->pFunc + of the leaves of the graph before calling this procedure.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_GraphToNetwork( Ivy_Man_t * p, Dec_Graph_t * pGraph ) +{ + Ivy_Obj_t * pAnd0, * pAnd1; + Dec_Node_t * pNode; + int i; + // check for constant function + if ( Dec_GraphIsConst(pGraph) ) + return Ivy_NotCond( Ivy_ManConst1(p), Dec_GraphIsComplement(pGraph) ); + // check for a literal + if ( Dec_GraphIsVar(pGraph) ) + return Ivy_NotCond( Dec_GraphVar(pGraph)->pFunc, Dec_GraphIsComplement(pGraph) ); + // build the AIG nodes corresponding to the AND gates of the graph + Dec_GraphForEachNode( pGraph, pNode, i ) + { + pAnd0 = Ivy_NotCond( Dec_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl ); + pAnd1 = Ivy_NotCond( Dec_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl ); + pNode->pFunc = Ivy_And( p, pAnd0, pAnd1 ); + } + // complement the result if necessary + return Ivy_NotCond( pNode->pFunc, Dec_GraphIsComplement(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [Replaces MFFC of the node by the new factored form.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_GraphUpdateNetwork( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int fUpdateLevel, int nGain ) +{ + Ivy_Obj_t * pRootNew; + int nNodesNew, nNodesOld, Required; + Required = fUpdateLevel? Vec_IntEntry( p->vRequired, pRoot->Id ) : 1000000; + nNodesOld = Ivy_ManNodeNum(p); + // create the new structure of nodes + pRootNew = Ivy_GraphToNetwork( p, pGraph ); + assert( (int)Ivy_Regular(pRootNew)->Level <= Required ); +// if ( Ivy_Regular(pRootNew)->Level == Required ) +// printf( "Difference %d.\n", Ivy_Regular(pRootNew)->Level - Required ); + // remove the old nodes +// Ivy_AigReplace( pMan->pManFunc, pRoot, pRootNew, fUpdateLevel ); +/* + if ( Ivy_IsComplement(pRootNew) ) + printf( "c" ); + else + printf( "d" ); + if ( Ivy_ObjRefs(Ivy_Regular(pRootNew)) > 0 ) + printf( "%d", Ivy_ObjRefs(Ivy_Regular(pRootNew)) ); + printf( " " ); +*/ + Ivy_ObjReplace( p, pRoot, pRootNew, 1, 0, 1 ); + // compare the gains + nNodesNew = Ivy_ManNodeNum(p); + assert( nGain <= nNodesOld - nNodesNew ); + // propagate the buffer + Ivy_ManPropagateBuffers( p, 1 ); +} + +/**Function************************************************************* + + Synopsis [Replaces MFFC of the node by the new factored form.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_GraphUpdateNetwork3( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int fUpdateLevel, int nGain ) +{ + Ivy_Obj_t * pRootNew, * pFanin; + int nNodesNew, nNodesOld, i, nRefsOld; + nNodesOld = Ivy_ManNodeNum(p); + +//printf( "Before = %d. ", Ivy_ManNodeNum(p) ); + // mark the cut + Vec_PtrForEachEntry( ((Rwt_Man_t *)p->pData)->vFanins, pFanin, i ) + Ivy_ObjRefsInc( Ivy_Regular(pFanin) ); + // deref the old cone + nRefsOld = pRoot->nRefs; + pRoot->nRefs = 0; + Ivy_ObjDelete_rec( p, pRoot, 0 ); + pRoot->nRefs = nRefsOld; + // unmark the cut + Vec_PtrForEachEntry( ((Rwt_Man_t *)p->pData)->vFanins, pFanin, i ) + Ivy_ObjRefsDec( Ivy_Regular(pFanin) ); +//printf( "Deref = %d. ", Ivy_ManNodeNum(p) ); + + // create the new structure of nodes + pRootNew = Ivy_GraphToNetwork( p, pGraph ); +//printf( "Create = %d. ", Ivy_ManNodeNum(p) ); + // remove the old nodes +// Ivy_AigReplace( pMan->pManFunc, pRoot, pRootNew, fUpdateLevel ); +/* + if ( Ivy_IsComplement(pRootNew) ) + printf( "c" ); + else + printf( "d" ); + if ( Ivy_ObjRefs(Ivy_Regular(pRootNew)) > 0 ) + printf( "%d", Ivy_ObjRefs(Ivy_Regular(pRootNew)) ); + printf( " " ); +*/ + Ivy_ObjReplace( p, pRoot, pRootNew, 0, 0, 1 ); +//printf( "Replace = %d. ", Ivy_ManNodeNum(p) ); + + // delete remaining dangling nodes + Vec_PtrForEachEntry( ((Rwt_Man_t *)p->pData)->vFanins, pFanin, i ) + { + pFanin = Ivy_Regular(pFanin); + if ( !Ivy_ObjIsNone(pFanin) && Ivy_ObjRefs(pFanin) == 0 ) + Ivy_ObjDelete_rec( p, pFanin, 1 ); + } +//printf( "Deref = %d. ", Ivy_ManNodeNum(p) ); +//printf( "\n" ); + + // compare the gains + nNodesNew = Ivy_ManNodeNum(p); + assert( nGain <= nNodesOld - nNodesNew ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyRwrAlg.c b/src/aig/ivy/ivyRwrAlg.c new file mode 100644 index 00000000..fc48deb0 --- /dev/null +++ b/src/aig/ivy/ivyRwrAlg.c @@ -0,0 +1,408 @@ +/**CFile**************************************************************** + + FileName [ivyRwrAlg.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Algebraic AIG rewriting.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyRwrAlg.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static int Ivy_ManFindAlgCut( Ivy_Obj_t * pRoot, Vec_Ptr_t * vFront, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vCone ); +static Ivy_Obj_t * Ivy_NodeRewriteAlg( Ivy_Obj_t * pObj, Vec_Ptr_t * vFront, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vCone, Vec_Ptr_t * vSols, int LevelR, int fUseZeroCost ); +static int Ivy_NodeCountMffc( Ivy_Obj_t * pNode ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Algebraic AIG rewriting.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManRewriteAlg( Ivy_Man_t * p, int fUpdateLevel, int fUseZeroCost ) +{ + Vec_Int_t * vRequired; + Vec_Ptr_t * vFront, * vLeaves, * vCone, * vSol; + Ivy_Obj_t * pObj, * pResult; + int i, RetValue, LevelR, nNodesOld; + int CountUsed, CountUndo; + vRequired = fUpdateLevel? Ivy_ManRequiredLevels( p ) : NULL; + vFront = Vec_PtrAlloc( 100 ); + vLeaves = Vec_PtrAlloc( 100 ); + vCone = Vec_PtrAlloc( 100 ); + vSol = Vec_PtrAlloc( 100 ); + // go through the nodes in the topological order + CountUsed = CountUndo = 0; + nNodesOld = Ivy_ManObjIdNext(p); + Ivy_ManForEachObj( p, pObj, i ) + { + assert( !Ivy_ObjIsBuf(pObj) ); + if ( i >= nNodesOld ) + break; + // skip no-nodes and MUX roots + if ( !Ivy_ObjIsNode(pObj) || Ivy_ObjIsExor(pObj) || Ivy_ObjIsMuxType(pObj) ) + continue; +// if ( pObj->Id > 297 ) // 296 --- 297 +// break; + if ( pObj->Id == 297 ) + { + int x = 0; + } + // get the largest algebraic cut + RetValue = Ivy_ManFindAlgCut( pObj, vFront, vLeaves, vCone ); + // the case of a trivial tree cut + if ( RetValue == 1 ) + continue; + // the case of constant 0 cone + if ( RetValue == -1 ) + { + Ivy_ObjReplace( pObj, Ivy_ManConst0(p), 1, 0, 1 ); + continue; + } + assert( Vec_PtrSize(vLeaves) > 2 ); + // get the required level for this node + LevelR = vRequired? Vec_IntEntry(vRequired, pObj->Id) : 1000000; + // create a new cone + pResult = Ivy_NodeRewriteAlg( pObj, vFront, vLeaves, vCone, vSol, LevelR, fUseZeroCost ); + if ( pResult == NULL || pResult == pObj ) + continue; + assert( Vec_PtrSize(vSol) == 1 || !Ivy_IsComplement(pResult) ); + if ( Ivy_ObjLevel(Ivy_Regular(pResult)) > LevelR && Ivy_ObjRefs(Ivy_Regular(pResult)) == 0 ) + Ivy_ObjDelete_rec(Ivy_Regular(pResult), 1), CountUndo++; + else + Ivy_ObjReplace( pObj, pResult, 1, 0, 1 ), CountUsed++; + } + printf( "Used = %d. Undo = %d.\n", CountUsed, CountUndo ); + Vec_PtrFree( vFront ); + Vec_PtrFree( vCone ); + Vec_PtrFree( vSol ); + if ( vRequired ) Vec_IntFree( vRequired ); + if ( i = Ivy_ManCleanup(p) ) + printf( "Cleanup after rewriting removed %d dangling nodes.\n", i ); + if ( !Ivy_ManCheck(p) ) + printf( "Ivy_ManRewriteAlg(): The check has failed.\n" ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Analizes one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_NodeRewriteAlg( Ivy_Obj_t * pObj, Vec_Ptr_t * vFront, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vCone, Vec_Ptr_t * vSols, int LevelR, int fUseZeroCost ) +{ + int fVerbose = 0; + Ivy_Obj_t * pTemp; + int k, Counter, nMffc, RetValue; + + if ( fVerbose ) + { + if ( Ivy_ObjIsExor(pObj) ) + printf( "x " ); + else + printf( " " ); + } + +/* + printf( "%d ", Vec_PtrSize(vFront) ); + printf( "( " ); + Vec_PtrForEachEntry( vFront, pTemp, k ) + printf( "%d ", Ivy_ObjRefs(Ivy_Regular(pTemp)) ); + printf( ")\n" ); +*/ + // collect nodes in the cone + if ( Ivy_ObjIsExor(pObj) ) + Ivy_ManCollectCone( pObj, vFront, vCone ); + else + Ivy_ManCollectCone( pObj, vLeaves, vCone ); + + // deref nodes in the cone + Vec_PtrForEachEntry( vCone, pTemp, k ) + { + Ivy_ObjRefsDec( Ivy_ObjFanin0(pTemp) ); + Ivy_ObjRefsDec( Ivy_ObjFanin1(pTemp) ); + pTemp->fMarkB = 1; + } + + // count the MFFC size + Vec_PtrForEachEntry( vFront, pTemp, k ) + Ivy_Regular(pTemp)->fMarkA = 1; + nMffc = Ivy_NodeCountMffc( pObj ); + Vec_PtrForEachEntry( vFront, pTemp, k ) + Ivy_Regular(pTemp)->fMarkA = 0; + + if ( fVerbose ) + { + Counter = 0; + Vec_PtrForEachEntry( vCone, pTemp, k ) + Counter += (Ivy_ObjRefs(pTemp) > 0); + printf( "%5d : Leaves = %2d. Cone = %2d. ConeRef = %2d. Mffc = %d. Lev = %d. LevR = %d.\n", + pObj->Id, Vec_PtrSize(vFront), Vec_PtrSize(vCone), Counter-1, nMffc, Ivy_ObjLevel(pObj), LevelR ); + } +/* + printf( "Leaves:" ); + Vec_PtrForEachEntry( vLeaves, pTemp, k ) + printf( " %d%s", Ivy_Regular(pTemp)->Id, Ivy_IsComplement(pTemp)? "\'" : "" ); + printf( "\n" ); + printf( "Cone:\n" ); + Vec_PtrForEachEntry( vCone, pTemp, k ) + printf( " %5d = %d%s %d%s\n", pTemp->Id, + Ivy_ObjFaninId0(pTemp), Ivy_ObjFaninC0(pTemp)? "\'" : "", + Ivy_ObjFaninId1(pTemp), Ivy_ObjFaninC1(pTemp)? "\'" : "" ); +*/ + + RetValue = Ivy_MultiPlus( vLeaves, vCone, Ivy_ObjType(pObj), nMffc + fUseZeroCost, vSols ); + + // ref nodes in the cone + Vec_PtrForEachEntry( vCone, pTemp, k ) + { + Ivy_ObjRefsInc( Ivy_ObjFanin0(pTemp) ); + Ivy_ObjRefsInc( Ivy_ObjFanin1(pTemp) ); + pTemp->fMarkA = 0; + pTemp->fMarkB = 0; + } + + if ( !RetValue ) + return NULL; + + if ( Vec_PtrSize( vSols ) == 1 ) + return Vec_PtrEntry( vSols, 0 ); + return Ivy_NodeBalanceBuildSuper( vSols, Ivy_ObjType(pObj), 1 ); +} + +/**Function************************************************************* + + Synopsis [Comparison for node pointers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeCountMffc_rec( Ivy_Obj_t * pNode ) +{ + if ( Ivy_ObjRefs(pNode) > 0 || Ivy_ObjIsCi(pNode) || pNode->fMarkA ) + return 0; + assert( pNode->fMarkB ); + pNode->fMarkA = 1; +// printf( "%d ", pNode->Id ); + if ( Ivy_ObjIsBuf(pNode) ) + return Ivy_NodeCountMffc_rec( Ivy_ObjFanin0(pNode) ); + return 1 + Ivy_NodeCountMffc_rec( Ivy_ObjFanin0(pNode) ) + Ivy_NodeCountMffc_rec( Ivy_ObjFanin1(pNode) ); +} + +/**Function************************************************************* + + Synopsis [Comparison for node pointers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeCountMffc( Ivy_Obj_t * pNode ) +{ + assert( pNode->fMarkB ); + return 1 + Ivy_NodeCountMffc_rec( Ivy_ObjFanin0(pNode) ) + Ivy_NodeCountMffc_rec( Ivy_ObjFanin1(pNode) ); +} + +/**Function************************************************************* + + Synopsis [Comparison for node pointers.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManFindAlgCutCompare( Ivy_Obj_t ** pp1, Ivy_Obj_t ** pp2 ) +{ + if ( *pp1 < *pp2 ) + return -1; + if ( *pp1 > *pp2 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Computing one algebraic cut.] + + Description [Returns 1 if the tree-leaves of this node where traversed + and found to have no external references (and have not been collected). + Returns 0 if the tree-leaves have external references and are collected.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManFindAlgCut_rec( Ivy_Obj_t * pObj, Ivy_Type_t Type, Vec_Ptr_t * vFront, Vec_Ptr_t * vCone ) +{ + int RetValue0, RetValue1; + Ivy_Obj_t * pObjR = Ivy_Regular(pObj); + assert( !Ivy_ObjIsBuf(pObjR) ); + assert( Type != IVY_EXOR || !Ivy_IsComplement(pObj) ); + + // make sure the node is not visited twice in different polarities + if ( Ivy_IsComplement(pObj) ) + { // if complemented, mark B + if ( pObjR->fMarkA ) + return -1; + pObjR->fMarkB = 1; + } + else + { // if non-complicated, mark A + if ( pObjR->fMarkB ) + return -1; + pObjR->fMarkA = 1; + } + Vec_PtrPush( vCone, pObjR ); + + // if the node is the end of the tree, return + if ( Ivy_IsComplement(pObj) || Ivy_ObjType(pObj) != Type ) + { + if ( Ivy_ObjRefs(pObjR) == 1 ) + return 1; + assert( Ivy_ObjRefs(pObjR) > 1 ); + Vec_PtrPush( vFront, pObj ); + return 0; + } + + // branch on the node + assert( !Ivy_IsComplement(pObj) ); + assert( Ivy_ObjIsNode(pObj) ); + // what if buffer has more than one fanout??? + RetValue0 = Ivy_ManFindAlgCut_rec( Ivy_ObjReal( Ivy_ObjChild0(pObj) ), Type, vFront, vCone ); + RetValue1 = Ivy_ManFindAlgCut_rec( Ivy_ObjReal( Ivy_ObjChild1(pObj) ), Type, vFront, vCone ); + if ( RetValue0 == -1 || RetValue1 == -1 ) + return -1; + + // the case when both have no external references + if ( RetValue0 && RetValue1 ) + { + if ( Ivy_ObjRefs(pObj) == 1 ) + return 1; + assert( Ivy_ObjRefs(pObj) > 1 ); + Vec_PtrPush( vFront, pObj ); + return 0; + } + // the case when one of them has external references + if ( RetValue0 ) + Vec_PtrPush( vFront, Ivy_ObjReal( Ivy_ObjChild0(pObj) ) ); + if ( RetValue1 ) + Vec_PtrPush( vFront, Ivy_ObjReal( Ivy_ObjChild1(pObj) ) ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Computing one algebraic cut.] + + Description [Algebraic cut stops when we hit (a) CI, (b) complemented edge, + (c) boundary of different gates. Returns 1 if this is a pure tree. + Returns -1 if the contant 0 is detected. Return 0 if the array can be used.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManFindAlgCut( Ivy_Obj_t * pRoot, Vec_Ptr_t * vFront, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vCone ) +{ + Ivy_Obj_t * pObj, * pPrev; + int RetValue, i; + assert( !Ivy_IsComplement(pRoot) ); + assert( Ivy_ObjIsNode(pRoot) ); + // clear the frontier and collect the nodes + Vec_PtrClear( vCone ); + Vec_PtrClear( vFront ); + Vec_PtrClear( vLeaves ); + RetValue = Ivy_ManFindAlgCut_rec( pRoot, Ivy_ObjType(pRoot), vFront, vCone ); + // clean the marks + Vec_PtrForEachEntry( vCone, pObj, i ) + pObj->fMarkA = pObj->fMarkB = 0; + // quit if the same node is found in both polarities + if ( RetValue == -1 ) + return -1; + // return if the node is the root of a tree + if ( RetValue == 1 ) + return 1; + // return if the cut is composed of two nodes + if ( Vec_PtrSize(vFront) <= 2 ) + return 1; + // sort the entries in increasing order + Vec_PtrSort( vFront, Ivy_ManFindAlgCutCompare ); + // remove duplicates from vFront and save the nodes in vLeaves + pPrev = Vec_PtrEntry(vFront, 0); + Vec_PtrPush( vLeaves, pPrev ); + Vec_PtrForEachEntryStart( vFront, pObj, i, 1 ) + { + // compare current entry and the previous entry + if ( pObj == pPrev ) + { + if ( Ivy_ObjIsExor(pRoot) ) // A <+> A = 0 + { + // vLeaves are no longer structural support of pRoot!!! + Vec_PtrPop(vLeaves); + pPrev = Vec_PtrSize(vLeaves) == 0 ? NULL : Vec_PtrEntryLast(vLeaves); + } + continue; + } + if ( pObj == Ivy_Not(pPrev) ) + { + assert( Ivy_ObjIsAnd(pRoot) ); + return -1; + } + pPrev = pObj; + Vec_PtrPush( vLeaves, pObj ); + } + if ( Vec_PtrSize(vLeaves) == 0 ) + return -1; + if ( Vec_PtrSize(vLeaves) <= 2 ) + return 1; + return 0; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivySeq.c b/src/aig/ivy/ivySeq.c new file mode 100644 index 00000000..0ee29fee --- /dev/null +++ b/src/aig/ivy/ivySeq.c @@ -0,0 +1,1134 @@ +/**CFile**************************************************************** + + FileName [ivySeq.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivySeq.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" +#include "deco.h" +#include "rwt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static int Ivy_NodeRewriteSeq( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pNode, int fUseZeroCost ); +static void Ivy_GraphPrepare( Dec_Graph_t * pGraph, Ivy_Cut_t * pCut, Vec_Ptr_t * vFanins, char * pPerm ); +static unsigned Ivy_CutGetTruth( Ivy_Man_t * p, Ivy_Obj_t * pObj, int * pNums, int nNums ); +static Dec_Graph_t * Rwt_CutEvaluateSeq( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pRoot, Ivy_Cut_t * pCut, char * pPerm, Vec_Ptr_t * vFaninsCur, int nNodesSaved, int * pGainBest, unsigned uTruth ); +static int Ivy_GraphToNetworkSeqCountSeq( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int NodeMax ); +static Ivy_Obj_t * Ivy_GraphToNetworkSeq( Ivy_Man_t * p, Dec_Graph_t * pGraph ); +static void Ivy_GraphUpdateNetworkSeq( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int nGain ); +static Ivy_Store_t * Ivy_CutComputeForNode( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves ); + +static inline int Ivy_CutHashValue( int NodeId ) { return 1 << (NodeId % 31); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//int nMoves; +//int nMovesS; +//int nClauses; +//int timeInv; + +/**Function************************************************************* + + Synopsis [Performs incremental rewriting of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManRewriteSeq( Ivy_Man_t * p, int fUseZeroCost, int fVerbose ) +{ + Rwt_Man_t * pManRwt; + Ivy_Obj_t * pNode; + int i, nNodes, nGain; + int clk, clkStart = clock(); + + // set the DC latch values + Ivy_ManForEachLatch( p, pNode, i ) + pNode->Init = IVY_INIT_DC; + // start the rewriting manager + pManRwt = Rwt_ManStart( 0 ); + p->pData = pManRwt; + if ( pManRwt == NULL ) + return 0; + // create fanouts + if ( p->fFanout == 0 ) + Ivy_ManStartFanout( p ); + // resynthesize each node once + nNodes = Ivy_ManObjIdMax(p); + Ivy_ManForEachNode( p, pNode, i ) + { + assert( !Ivy_ObjIsBuf(pNode) ); + assert( !Ivy_ObjIsBuf(Ivy_ObjFanin0(pNode)) ); + assert( !Ivy_ObjIsBuf(Ivy_ObjFanin1(pNode)) ); + // fix the fanin buffer problem +// Ivy_NodeFixBufferFanins( p, pNode ); +// if ( Ivy_ObjIsBuf(pNode) ) +// continue; + // stop if all nodes have been tried once + if ( i > nNodes ) + break; + // for each cut, try to resynthesize it + nGain = Ivy_NodeRewriteSeq( p, pManRwt, pNode, fUseZeroCost ); + if ( nGain > 0 || nGain == 0 && fUseZeroCost ) + { + Dec_Graph_t * pGraph = Rwt_ManReadDecs(pManRwt); + int fCompl = Rwt_ManReadCompl(pManRwt); + // complement the FF if needed +clk = clock(); + if ( fCompl ) Dec_GraphComplement( pGraph ); + Ivy_GraphUpdateNetworkSeq( p, pNode, pGraph, nGain ); + if ( fCompl ) Dec_GraphComplement( pGraph ); +Rwt_ManAddTimeUpdate( pManRwt, clock() - clk ); + } + } +Rwt_ManAddTimeTotal( pManRwt, clock() - clkStart ); + // print stats + if ( fVerbose ) + Rwt_ManPrintStats( pManRwt ); + // delete the managers + Rwt_ManStop( pManRwt ); + p->pData = NULL; + // fix the levels + Ivy_ManResetLevels( p ); +// if ( Ivy_ManCheckFanoutNums(p) ) +// printf( "Ivy_ManRewritePre(): The check has failed.\n" ); + // check + if ( !Ivy_ManCheck(p) ) + printf( "Ivy_ManRewritePre(): The check has failed.\n" ); + return 1; +} + + +/**Function************************************************************* + + Synopsis [Performs rewriting for one node.] + + Description [This procedure considers all the cuts computed for the node + and tries to rewrite each of them using the "forest" of different AIG + structures precomputed and stored in the RWR manager. + Determines the best rewriting and computes the gain in the number of AIG + nodes in the final network. In the end, p->vFanins contains information + about the best cut that can be used for rewriting, while p->pGraph gives + the decomposition dag (represented using decomposition graph data structure). + Returns gain in the number of nodes or -1 if node cannot be rewritten.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_NodeRewriteSeq( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pNode, int fUseZeroCost ) +{ + int fVeryVerbose = 0; + Dec_Graph_t * pGraph; + Ivy_Store_t * pStore; + Ivy_Cut_t * pCut; + Ivy_Obj_t * pFanin;//, * pFanout; + Vec_Ptr_t * vFanout; + unsigned uPhase, uTruthBest, uTruth;//, nNewClauses; + char * pPerm; + int nNodesSaved, nNodesSaveCur; + int i, c, GainCur, GainBest = -1; + int clk, clk2;//, clk3; + + p->nNodesConsidered++; + // get the node's cuts +clk = clock(); + pStore = Ivy_CutComputeForNode( pMan, pNode, 5 ); +p->timeCut += clock() - clk; + + // go through the cuts +clk = clock(); + vFanout = Vec_PtrAlloc( 100 ); + for ( c = 1; c < pStore->nCuts; c++ ) + { + pCut = pStore->pCuts + c; + // consider only 4-input cuts + if ( pCut->nSize != 4 ) + continue; + // skip the cuts with buffers + for ( i = 0; i < (int)pCut->nSize; i++ ) + if ( Ivy_ObjIsBuf( Ivy_ManObj(pMan, Ivy_LeafId(pCut->pArray[i])) ) ) + break; + if ( i != pCut->nSize ) + { + p->nCutsBad++; + continue; + } + p->nCutsGood++; + // get the fanin permutation +clk2 = clock(); + uTruth = 0xFFFF & Ivy_CutGetTruth( pMan, pNode, pCut->pArray, pCut->nSize ); // truth table +p->timeTruth += clock() - clk2; + pPerm = p->pPerms4[ p->pPerms[uTruth] ]; + uPhase = p->pPhases[uTruth]; + // collect fanins with the corresponding permutation/phase + Vec_PtrClear( p->vFaninsCur ); + Vec_PtrFill( p->vFaninsCur, (int)pCut->nSize, 0 ); + for ( i = 0; i < (int)pCut->nSize; i++ ) + { + pFanin = Ivy_ManObj( pMan, Ivy_LeafId( pCut->pArray[pPerm[i]] ) ); + assert( Ivy_ObjIsNode(pFanin) || Ivy_ObjIsCi(pFanin) || Ivy_ObjIsConst1(pFanin) ); + pFanin = Ivy_NotCond(pFanin, ((uPhase & (1<<i)) > 0) ); + Vec_PtrWriteEntry( p->vFaninsCur, i, pFanin ); + } +clk2 = clock(); + // mark the fanin boundary + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + Ivy_ObjRefsInc( Ivy_Regular(pFanin) ); + // label MFFC with current ID + Ivy_ManIncrementTravId( pMan ); + nNodesSaved = Ivy_ObjMffcLabel( pMan, pNode ); + // label fanouts with the current ID +// Ivy_ObjForEachFanout( pMan, pNode, vFanout, pFanout, i ) +// Ivy_ObjSetTravIdCurrent( pMan, pFanout ); + // unmark the fanin boundary + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + Ivy_ObjRefsDec( Ivy_Regular(pFanin) ); +p->timeMffc += clock() - clk2; + + // evaluate the cut +clk2 = clock(); + pGraph = Rwt_CutEvaluateSeq( pMan, p, pNode, pCut, pPerm, p->vFaninsCur, nNodesSaved, &GainCur, uTruth ); +p->timeEval += clock() - clk2; + + + // check if the cut is better than the current best one + if ( pGraph != NULL && GainBest < GainCur ) + { + // save this form + nNodesSaveCur = nNodesSaved; + GainBest = GainCur; + p->pGraph = pGraph; + p->pCut = pCut; + p->pPerm = pPerm; + p->fCompl = ((uPhase & (1<<4)) > 0); + uTruthBest = uTruth; + // collect fanins in the + Vec_PtrClear( p->vFanins ); + Vec_PtrForEachEntry( p->vFaninsCur, pFanin, i ) + Vec_PtrPush( p->vFanins, pFanin ); + } + } + Vec_PtrFree( vFanout ); +p->timeRes += clock() - clk; + + if ( GainBest == -1 ) + return -1; +/* + { + Ivy_Cut_t * pCut = p->pCut; + printf( "Node %5d. Using cut : {", Ivy_ObjId(pNode) ); + for ( i = 0; i < pCut->nSize; i++ ) + printf( " %d(%d)", Ivy_LeafId(pCut->pArray[i]), Ivy_LeafLat(pCut->pArray[i]) ); + printf( " }\n" ); + } +*/ + +//clk3 = clock(); +//nNewClauses = Ivy_CutTruthPrint( pMan, p->pCut, uTruth ); +//timeInv += clock() - clk; + +// nClauses += nNewClauses; +// nMoves++; +// if ( nNewClauses > 0 ) +// nMovesS++; + + // copy the leaves + Ivy_GraphPrepare( p->pGraph, p->pCut, p->vFanins, p->pPerm ); + + p->nScores[p->pMap[uTruthBest]]++; + p->nNodesGained += GainBest; + if ( fUseZeroCost || GainBest > 0 ) + p->nNodesRewritten++; + +/* + if ( GainBest > 0 ) + { + Ivy_Cut_t * pCut = p->pCut; + printf( "Node %5d. Using cut : {", Ivy_ObjId(pNode) ); + for ( i = 0; i < pCut->nSize; i++ ) + printf( " %5d(%2d)", Ivy_LeafId(pCut->pArray[i]), Ivy_LeafLat(pCut->pArray[i]) ); + printf( " }\n" ); + } +*/ + + // report the progress + if ( fVeryVerbose && GainBest > 0 ) + { + printf( "Node %6d : ", Ivy_ObjId(pNode) ); + printf( "Fanins = %d. ", p->vFanins->nSize ); + printf( "Save = %d. ", nNodesSaveCur ); + printf( "Add = %d. ", nNodesSaveCur-GainBest ); + printf( "GAIN = %d. ", GainBest ); + printf( "Cone = %d. ", p->pGraph? Dec_GraphNodeNum(p->pGraph) : 0 ); + printf( "Class = %d. ", p->pMap[uTruthBest] ); + printf( "\n" ); + } + return GainBest; +} + + +/**Function************************************************************* + + Synopsis [Evaluates the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dec_Graph_t * Rwt_CutEvaluateSeq( Ivy_Man_t * pMan, Rwt_Man_t * p, Ivy_Obj_t * pRoot, Ivy_Cut_t * pCut, char * pPerm, Vec_Ptr_t * vFaninsCur, int nNodesSaved, int * pGainBest, unsigned uTruth ) +{ + Vec_Ptr_t * vSubgraphs; + Dec_Graph_t * pGraphBest, * pGraphCur; + Rwt_Node_t * pNode; + int nNodesAdded, GainBest, i; + // find the matching class of subgraphs + vSubgraphs = Vec_VecEntry( p->vClasses, p->pMap[uTruth] ); + p->nSubgraphs += vSubgraphs->nSize; + // determine the best subgraph + GainBest = -1; + Vec_PtrForEachEntry( vSubgraphs, pNode, i ) + { + // get the current graph + pGraphCur = (Dec_Graph_t *)pNode->pNext; + +// if ( pRoot->Id == 8648 ) +// Dec_GraphPrint( stdout, pGraphCur, NULL, NULL ); + // copy the leaves +// Vec_PtrForEachEntry( vFaninsCur, pFanin, k ) +// Dec_GraphNode(pGraphCur, k)->pFunc = pFanin; + Ivy_GraphPrepare( pGraphCur, pCut, vFaninsCur, pPerm ); + + // detect how many unlabeled nodes will be reused + nNodesAdded = Ivy_GraphToNetworkSeqCountSeq( pMan, pRoot, pGraphCur, nNodesSaved ); + if ( nNodesAdded == -1 ) + continue; + assert( nNodesSaved >= nNodesAdded ); + // count the gain at this node + if ( GainBest < nNodesSaved - nNodesAdded ) + { + GainBest = nNodesSaved - nNodesAdded; + pGraphBest = pGraphCur; + } + } + if ( GainBest == -1 ) + return NULL; + *pGainBest = GainBest; + return pGraphBest; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_GraphPrepare( Dec_Graph_t * pGraph, Ivy_Cut_t * pCut, Vec_Ptr_t * vFanins, char * pPerm ) +{ + Dec_Node_t * pNode, * pNode0, * pNode1; + int i; + assert( Dec_GraphLeaveNum(pGraph) == pCut->nSize ); + assert( Vec_PtrSize(vFanins) == pCut->nSize ); + // label the leaves with latch numbers + Dec_GraphForEachLeaf( pGraph, pNode, i ) + { + pNode->pFunc = Vec_PtrEntry( vFanins, i ); + pNode->nLat2 = Ivy_LeafLat( pCut->pArray[pPerm[i]] ); + } + // propagate latches through the nodes + Dec_GraphForEachNode( pGraph, pNode, i ) + { + // get the children of this node + pNode0 = Dec_GraphNode( pGraph, pNode->eEdge0.Node ); + pNode1 = Dec_GraphNode( pGraph, pNode->eEdge1.Node ); + // distribute the latches + pNode->nLat2 = IVY_MIN( pNode0->nLat2, pNode1->nLat2 ); + pNode->nLat0 = pNode0->nLat2 - pNode->nLat2; + pNode->nLat1 = pNode1->nLat2 - pNode->nLat2; + } +} + +/**Function************************************************************* + + Synopsis [Counts the number of new nodes added when using this graph.] + + Description [AIG nodes for the fanins should be assigned to pNode->pFunc + of the leaves of the graph before calling this procedure. + Returns -1 if the number of nodes and levels exceeded the given limit or + the number of levels exceeded the maximum allowed level.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_GraphToNetworkSeqCountSeq( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int NodeMax ) +{ + Dec_Node_t * pNode, * pNode0, * pNode1; + Ivy_Obj_t * pAnd, * pAnd0, * pAnd1; + int i, k, Counter, fCompl; + // check for constant function or a literal + if ( Dec_GraphIsConst(pGraph) || Dec_GraphIsVar(pGraph) ) + return 0; + // compute the AIG size after adding the internal nodes + Counter = 0; + Dec_GraphForEachNode( pGraph, pNode, i ) + { + // get the children of this node + pNode0 = Dec_GraphNode( pGraph, pNode->eEdge0.Node ); + pNode1 = Dec_GraphNode( pGraph, pNode->eEdge1.Node ); + // get the AIG nodes corresponding to the children + pAnd0 = pNode0->pFunc; + pAnd1 = pNode1->pFunc; + // skip the latches + for ( k = 0; pAnd0 && k < (int)pNode->nLat0; k++ ) + { + fCompl = Ivy_IsComplement(pAnd0); + pAnd0 = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, Ivy_Regular(pAnd0), NULL, IVY_LATCH, IVY_INIT_DC) ); + if ( pAnd0 ) + pAnd0 = Ivy_NotCond( pAnd0, fCompl ); + } + for ( k = 0; pAnd1 && k < (int)pNode->nLat1; k++ ) + { + fCompl = Ivy_IsComplement(pAnd1); + pAnd1 = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, Ivy_Regular(pAnd1), NULL, IVY_LATCH, IVY_INIT_DC) ); + if ( pAnd1 ) + pAnd1 = Ivy_NotCond( pAnd1, fCompl ); + } + // get the new node + if ( pAnd0 && pAnd1 ) + { + // if they are both present, find the resulting node + pAnd0 = Ivy_NotCond( pAnd0, pNode->eEdge0.fCompl ); + pAnd1 = Ivy_NotCond( pAnd1, pNode->eEdge1.fCompl ); + assert( !Ivy_ObjIsLatch(Ivy_Regular(pAnd0)) || !Ivy_ObjIsLatch(Ivy_Regular(pAnd1)) ); + if ( Ivy_Regular(pAnd0) == Ivy_Regular(pAnd1) || Ivy_ObjIsConst1(Ivy_Regular(pAnd0)) || Ivy_ObjIsConst1(Ivy_Regular(pAnd1)) ) + pAnd = Ivy_And( p, pAnd0, pAnd1 ); + else + pAnd = Ivy_TableLookup( p, Ivy_ObjCreateGhost(p, pAnd0, pAnd1, IVY_AND, IVY_INIT_NONE) ); + // return -1 if the node is the same as the original root + if ( Ivy_Regular(pAnd) == pRoot ) + return -1; + } + else + pAnd = NULL; + // count the number of added nodes + if ( pAnd == NULL || Ivy_ObjIsTravIdCurrent(p, Ivy_Regular(pAnd)) ) + { + if ( ++Counter > NodeMax ) + return -1; + } + pNode->pFunc = pAnd; + } + return Counter; +} + + +/**Function************************************************************* + + Synopsis [Transforms the decomposition graph into the AIG.] + + Description [AIG nodes for the fanins should be assigned to pNode->pFunc + of the leaves of the graph before calling this procedure.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_GraphToNetworkSeq( Ivy_Man_t * p, Dec_Graph_t * pGraph ) +{ + Ivy_Obj_t * pAnd0, * pAnd1; + Dec_Node_t * pNode; + int i, k; + // check for constant function + if ( Dec_GraphIsConst(pGraph) ) + return Ivy_NotCond( Ivy_ManConst1(p), Dec_GraphIsComplement(pGraph) ); + // check for a literal + if ( Dec_GraphIsVar(pGraph) ) + { + // get the variable node + pNode = Dec_GraphVar(pGraph); + // add the remaining latches + for ( k = 0; k < (int)pNode->nLat2; k++ ) + pNode->pFunc = Ivy_Latch( p, pNode->pFunc, IVY_INIT_DC ); + return Ivy_NotCond( pNode->pFunc, Dec_GraphIsComplement(pGraph) ); + } + // build the AIG nodes corresponding to the AND gates of the graph + Dec_GraphForEachNode( pGraph, pNode, i ) + { + pAnd0 = Ivy_NotCond( Dec_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl ); + pAnd1 = Ivy_NotCond( Dec_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl ); + // add the latches + for ( k = 0; k < (int)pNode->nLat0; k++ ) + pAnd0 = Ivy_Latch( p, pAnd0, IVY_INIT_DC ); + for ( k = 0; k < (int)pNode->nLat1; k++ ) + pAnd1 = Ivy_Latch( p, pAnd1, IVY_INIT_DC ); + // create the node + pNode->pFunc = Ivy_And( p, pAnd0, pAnd1 ); + } + // add the remaining latches + for ( k = 0; k < (int)pNode->nLat2; k++ ) + pNode->pFunc = Ivy_Latch( p, pNode->pFunc, IVY_INIT_DC ); + // complement the result if necessary + return Ivy_NotCond( pNode->pFunc, Dec_GraphIsComplement(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [Replaces MFFC of the node by the new factored form.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_GraphUpdateNetworkSeq( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Dec_Graph_t * pGraph, int nGain ) +{ + Ivy_Obj_t * pRootNew; + int nNodesNew, nNodesOld; + nNodesOld = Ivy_ManNodeNum(p); + // create the new structure of nodes + pRootNew = Ivy_GraphToNetworkSeq( p, pGraph ); + Ivy_ObjReplace( p, pRoot, pRootNew, 1, 0, 0 ); + // compare the gains + nNodesNew = Ivy_ManNodeNum(p); + assert( nGain <= nNodesOld - nNodesNew ); + // propagate the buffer + Ivy_ManPropagateBuffers( p, 0 ); +} + + + + + + + + + +/**Function************************************************************* + + Synopsis [Computes the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_CutGetTruth_rec( Ivy_Man_t * p, int Leaf, int * pNums, int nNums ) +{ + static unsigned uMasks[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 }; + unsigned uTruth0, uTruth1; + Ivy_Obj_t * pObj; + int i; + for ( i = 0; i < nNums; i++ ) + if ( Leaf == pNums[i] ) + return uMasks[i]; + pObj = Ivy_ManObj( p, Ivy_LeafId(Leaf) ); + if ( Ivy_ObjIsLatch(pObj) ) + { + assert( !Ivy_ObjFaninC0(pObj) ); + Leaf = Ivy_LeafCreate( Ivy_ObjFaninId0(pObj), Ivy_LeafLat(Leaf) + 1 ); + return Ivy_CutGetTruth_rec( p, Leaf, pNums, nNums ); + } + assert( Ivy_ObjIsNode(pObj) || Ivy_ObjIsBuf(pObj) ); + Leaf = Ivy_LeafCreate( Ivy_ObjFaninId0(pObj), Ivy_LeafLat(Leaf) ); + uTruth0 = Ivy_CutGetTruth_rec( p, Leaf, pNums, nNums ); + if ( Ivy_ObjFaninC0(pObj) ) + uTruth0 = ~uTruth0; + if ( Ivy_ObjIsBuf(pObj) ) + return uTruth0; + Leaf = Ivy_LeafCreate( Ivy_ObjFaninId1(pObj), Ivy_LeafLat(Leaf) ); + uTruth1 = Ivy_CutGetTruth_rec( p, Leaf, pNums, nNums ); + if ( Ivy_ObjFaninC1(pObj) ) + uTruth1 = ~uTruth1; + return uTruth0 & uTruth1; +} + + +/**Function************************************************************* + + Synopsis [Computes the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Ivy_CutGetTruth( Ivy_Man_t * p, Ivy_Obj_t * pObj, int * pNums, int nNums ) +{ + assert( Ivy_ObjIsNode(pObj) ); + assert( nNums < 6 ); + return Ivy_CutGetTruth_rec( p, Ivy_LeafCreate(pObj->Id, 0), pNums, nNums ); +} + + + + + +/**Function************************************************************* + + Synopsis [Returns 1 if the cut can be constructed; 0 otherwise.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutPrescreen( Ivy_Cut_t * pCut, int Id0, int Id1 ) +{ + int i; + if ( pCut->nSize < pCut->nSizeMax ) + return 1; + for ( i = 0; i < pCut->nSize; i++ ) + if ( pCut->pArray[i] == Id0 || pCut->pArray[i] == Id1 ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [Derives new cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutDeriveNew2( Ivy_Cut_t * pCut, Ivy_Cut_t * pCutNew, int IdOld, int IdNew0, int IdNew1 ) +{ + unsigned uHash = 0; + int i, k; + assert( pCut->nSize > 0 ); + assert( IdNew0 < IdNew1 ); + for ( i = k = 0; i < pCut->nSize; i++ ) + { + if ( pCut->pArray[i] == IdOld ) + continue; + if ( IdNew0 >= 0 ) + { + if ( IdNew0 <= pCut->pArray[i] ) + { + if ( IdNew0 < pCut->pArray[i] ) + { + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_CutHashValue( IdNew0 ); + } + IdNew0 = -1; + } + } + if ( IdNew1 >= 0 ) + { + if ( IdNew1 <= pCut->pArray[i] ) + { + if ( IdNew1 < pCut->pArray[i] ) + { + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_CutHashValue( IdNew1 ); + } + IdNew1 = -1; + } + } + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = pCut->pArray[i]; + uHash |= Ivy_CutHashValue( pCut->pArray[i] ); + } + if ( IdNew0 >= 0 ) + { + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_CutHashValue( IdNew0 ); + } + if ( IdNew1 >= 0 ) + { + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_CutHashValue( IdNew1 ); + } + pCutNew->nSize = k; + pCutNew->uHash = uHash; + assert( pCutNew->nSize <= pCut->nSizeMax ); + for ( i = 1; i < pCutNew->nSize; i++ ) + assert( pCutNew->pArray[i-1] < pCutNew->pArray[i] ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Derives new cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutDeriveNew( Ivy_Cut_t * pCut, Ivy_Cut_t * pCutNew, int IdOld, int IdNew0, int IdNew1 ) +{ + unsigned uHash = 0; + int i, k; + assert( pCut->nSize > 0 ); + assert( IdNew0 < IdNew1 ); + for ( i = k = 0; i < pCut->nSize; i++ ) + { + if ( pCut->pArray[i] == IdOld ) + continue; + if ( IdNew0 <= pCut->pArray[i] ) + { + if ( IdNew0 < pCut->pArray[i] ) + { + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_CutHashValue( IdNew0 ); + } + IdNew0 = 0x7FFFFFFF; + } + if ( IdNew1 <= pCut->pArray[i] ) + { + if ( IdNew1 < pCut->pArray[i] ) + { + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_CutHashValue( IdNew1 ); + } + IdNew1 = 0x7FFFFFFF; + } + pCutNew->pArray[ k++ ] = pCut->pArray[i]; + uHash |= Ivy_CutHashValue( pCut->pArray[i] ); + } + if ( IdNew0 < 0x7FFFFFFF ) + { + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_CutHashValue( IdNew0 ); + } + if ( IdNew1 < 0x7FFFFFFF ) + { + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_CutHashValue( IdNew1 ); + } + pCutNew->nSize = k; + pCutNew->uHash = uHash; + assert( pCutNew->nSize <= pCut->nSizeMax ); +// for ( i = 1; i < pCutNew->nSize; i++ ) +// assert( pCutNew->pArray[i-1] < pCutNew->pArray[i] ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Find the hash value of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Ivy_NodeCutHash( Ivy_Cut_t * pCut ) +{ + int i; + pCut->uHash = 0; + for ( i = 0; i < pCut->nSize; i++ ) + pCut->uHash |= (1 << (pCut->pArray[i] % 31)); + return pCut->uHash; +} + +/**Function************************************************************* + + Synopsis [Derives new cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutDeriveNew3( Ivy_Cut_t * pCut, Ivy_Cut_t * pCutNew, int IdOld, int IdNew0, int IdNew1 ) +{ + int i, k; + assert( pCut->nSize > 0 ); + assert( IdNew0 < IdNew1 ); + for ( i = k = 0; i < pCut->nSize; i++ ) + { + if ( pCut->pArray[i] == IdOld ) + continue; + if ( IdNew0 <= pCut->pArray[i] ) + { + if ( IdNew0 < pCut->pArray[i] ) + pCutNew->pArray[ k++ ] = IdNew0; + IdNew0 = 0x7FFFFFFF; + } + if ( IdNew1 <= pCut->pArray[i] ) + { + if ( IdNew1 < pCut->pArray[i] ) + pCutNew->pArray[ k++ ] = IdNew1; + IdNew1 = 0x7FFFFFFF; + } + pCutNew->pArray[ k++ ] = pCut->pArray[i]; + } + if ( IdNew0 < 0x7FFFFFFF ) + pCutNew->pArray[ k++ ] = IdNew0; + if ( IdNew1 < 0x7FFFFFFF ) + pCutNew->pArray[ k++ ] = IdNew1; + pCutNew->nSize = k; + assert( pCutNew->nSize <= pCut->nSizeMax ); + Ivy_NodeCutHash( pCutNew ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pDom is contained in pCut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutCheckDominance( Ivy_Cut_t * pDom, Ivy_Cut_t * pCut ) +{ + int i, k; + for ( i = 0; i < pDom->nSize; i++ ) + { + assert( i==0 || pDom->pArray[i-1] < pDom->pArray[i] ); + for ( k = 0; k < pCut->nSize; k++ ) + if ( pDom->pArray[i] == pCut->pArray[k] ) + break; + if ( k == pCut->nSize ) // node i in pDom is not contained in pCut + return 0; + } + // every node in pDom is contained in pCut + return 1; +} + +/**Function************************************************************* + + Synopsis [Check if the cut exists.] + + Description [Returns 1 if the cut exists.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_CutFindOrAddFilter( Ivy_Store_t * pCutStore, Ivy_Cut_t * pCutNew ) +{ + Ivy_Cut_t * pCut; + int i, k; + assert( pCutNew->uHash ); + // try to find the cut + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + if ( pCut->nSize == pCutNew->nSize ) + { + if ( pCut->uHash == pCutNew->uHash ) + { + for ( k = 0; k < pCutNew->nSize; k++ ) + if ( pCut->pArray[k] != pCutNew->pArray[k] ) + break; + if ( k == pCutNew->nSize ) + return 1; + } + continue; + } + if ( pCut->nSize < pCutNew->nSize ) + { + // skip the non-contained cuts + if ( (pCut->uHash & pCutNew->uHash) != pCut->uHash ) + continue; + // check containment seriously + if ( Ivy_CutCheckDominance( pCut, pCutNew ) ) + return 1; + continue; + } + // check potential containment of other cut + + // skip the non-contained cuts + if ( (pCut->uHash & pCutNew->uHash) != pCutNew->uHash ) + continue; + // check containment seriously + if ( Ivy_CutCheckDominance( pCutNew, pCut ) ) + { + // remove the current cut + pCut->nSize = 0; + } + } + assert( pCutStore->nCuts < pCutStore->nCutsMax ); + // add the cut + pCut = pCutStore->pCuts + pCutStore->nCuts++; + *pCut = *pCutNew; + return 0; +} + +/**Function************************************************************* + + Synopsis [Compresses the cut representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutCompactAll( Ivy_Store_t * pCutStore ) +{ + Ivy_Cut_t * pCut; + int i, k; + pCutStore->nCutsM = 0; + for ( i = k = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + if ( pCut->nSize < pCut->nSizeMax ) + pCutStore->nCutsM++; + pCutStore->pCuts[k++] = *pCut; + } + pCutStore->nCuts = k; +} + +/**Function************************************************************* + + Synopsis [Print the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutPrintForNode( Ivy_Cut_t * pCut ) +{ + int i; + assert( pCut->nSize > 0 ); + printf( "%d : {", pCut->nSize ); + for ( i = 0; i < pCut->nSize; i++ ) + printf( " %d", pCut->pArray[i] ); + printf( " }\n" ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutPrintForNodes( Ivy_Store_t * pCutStore ) +{ + int i; + printf( "Node %d\n", pCutStore->pCuts[0].pArray[0] ); + for ( i = 0; i < pCutStore->nCuts; i++ ) + Ivy_CutPrintForNode( pCutStore->pCuts + i ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutReadLeaf( Ivy_Obj_t * pFanin ) +{ + int nLats, iLeaf; + assert( !Ivy_IsComplement(pFanin) ); + if ( !Ivy_ObjIsLatch(pFanin) ) + return Ivy_LeafCreate( pFanin->Id, 0 ); + iLeaf = Ivy_CutReadLeaf(Ivy_ObjFanin0(pFanin)); + nLats = Ivy_LeafLat(iLeaf); + assert( nLats < IVY_LEAF_MASK ); + return 1 + iLeaf; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Store_t * Ivy_CutComputeForNode( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves ) +{ + static Ivy_Store_t CutStore, * pCutStore = &CutStore; + Ivy_Cut_t CutNew, * pCutNew = &CutNew, * pCut; + Ivy_Man_t * pMan = p; + Ivy_Obj_t * pLeaf; + int i, k, Temp, nLats, iLeaf0, iLeaf1; + + assert( nLeaves <= IVY_CUT_INPUT ); + + // start the structure + pCutStore->nCuts = 0; + pCutStore->nCutsMax = IVY_CUT_LIMIT; + // start the trivial cut + pCutNew->uHash = 0; + pCutNew->nSize = 1; + pCutNew->nSizeMax = nLeaves; + pCutNew->pArray[0] = Ivy_LeafCreate( pObj->Id, 0 ); + pCutNew->uHash = Ivy_CutHashValue( pCutNew->pArray[0] ); + // add the trivial cut + pCutStore->pCuts[pCutStore->nCuts++] = *pCutNew; + assert( pCutStore->nCuts == 1 ); + + // explore the cuts + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + // expand this cut + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + for ( k = 0; k < pCut->nSize; k++ ) + { + pLeaf = Ivy_ManObj( p, Ivy_LeafId(pCut->pArray[k]) ); + if ( Ivy_ObjIsCi(pLeaf) || Ivy_ObjIsConst1(pLeaf) ) + continue; + assert( Ivy_ObjIsNode(pLeaf) ); + nLats = Ivy_LeafLat(pCut->pArray[k]); + + // get the fanins fanins + iLeaf0 = Ivy_CutReadLeaf( Ivy_ObjFanin0(pLeaf) ); + iLeaf1 = Ivy_CutReadLeaf( Ivy_ObjFanin1(pLeaf) ); + assert( nLats + Ivy_LeafLat(iLeaf0) < IVY_LEAF_MASK && nLats + Ivy_LeafLat(iLeaf1) < IVY_LEAF_MASK ); + iLeaf0 = nLats + iLeaf0; + iLeaf1 = nLats + iLeaf1; + if ( !Ivy_CutPrescreen( pCut, iLeaf0, iLeaf1 ) ) + continue; + // the given cut exist + if ( iLeaf0 > iLeaf1 ) + Temp = iLeaf0, iLeaf0 = iLeaf1, iLeaf1 = Temp; + // create the new cut + if ( !Ivy_CutDeriveNew( pCut, pCutNew, pCut->pArray[k], iLeaf0, iLeaf1 ) ) + continue; + // add the cut + Ivy_CutFindOrAddFilter( pCutStore, pCutNew ); + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + break; + } + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + break; + } + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + pCutStore->fSatur = 1; + else + pCutStore->fSatur = 0; +// printf( "%d ", pCutStore->nCuts ); + Ivy_CutCompactAll( pCutStore ); +// printf( "%d \n", pCutStore->nCuts ); +// Ivy_CutPrintForNodes( pCutStore ); + return pCutStore; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutComputeAll( Ivy_Man_t * p, int nInputs ) +{ + Ivy_Store_t * pStore; + Ivy_Obj_t * pObj; + int i, nCutsTotal, nCutsTotalM, nNodeTotal, nNodeOver; + int clk = clock(); + if ( nInputs > IVY_CUT_INPUT ) + { + printf( "Cannot compute cuts for more than %d inputs.\n", IVY_CUT_INPUT ); + return; + } + nNodeTotal = nNodeOver = 0; + nCutsTotal = nCutsTotalM = -Ivy_ManNodeNum(p); + Ivy_ManForEachObj( p, pObj, i ) + { + if ( !Ivy_ObjIsNode(pObj) ) + continue; + pStore = Ivy_CutComputeForNode( p, pObj, nInputs ); + nCutsTotal += pStore->nCuts; + nCutsTotalM += pStore->nCutsM; + nNodeOver += pStore->fSatur; + nNodeTotal++; + } + printf( "All = %6d. Minus = %6d. Triv = %6d. Node = %6d. Satur = %6d. ", + nCutsTotal, nCutsTotalM, Ivy_ManPiNum(p) + Ivy_ManNodeNum(p), nNodeTotal, nNodeOver ); + PRT( "Time", clock() - clk ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyShow.c b/src/aig/ivy/ivyShow.c new file mode 100644 index 00000000..cd726e43 --- /dev/null +++ b/src/aig/ivy/ivyShow.c @@ -0,0 +1,338 @@ +/**CFile**************************************************************** + + FileName [ivyShow.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Visualization of HAIG.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyShow.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static void Ivy_WriteDotAig( Ivy_Man_t * pMan, char * pFileName, int fHaig, Vec_Ptr_t * vBold ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManShow( Ivy_Man_t * pMan, int fHaig, Vec_Ptr_t * vBold ) +{ + extern void Abc_ShowFile( char * FileNameDot ); + static Counter = 0; + char FileNameDot[200]; + FILE * pFile; + // create the file name +// Ivy_ShowGetFileName( pMan->pName, FileNameDot ); + sprintf( FileNameDot, "temp%02d.dot", Counter++ ); + // check that the file can be opened + if ( (pFile = fopen( FileNameDot, "w" )) == NULL ) + { + fprintf( stdout, "Cannot open the intermediate file \"%s\".\n", FileNameDot ); + return; + } + fclose( pFile ); + // generate the file + Ivy_WriteDotAig( pMan, FileNameDot, fHaig, vBold ); + // visualize the file + Abc_ShowFile( FileNameDot ); +} + +/**Function************************************************************* + + Synopsis [Writes the graph structure of AIG for DOT.] + + Description [Useful for graph visualization using tools such as GraphViz: + http://www.graphviz.org/] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_WriteDotAig( Ivy_Man_t * pMan, char * pFileName, int fHaig, Vec_Ptr_t * vBold ) +{ + FILE * pFile; + Ivy_Obj_t * pNode, * pTemp, * pPrev; + int LevelMax, Level, i; + + if ( Ivy_ManNodeNum(pMan) > 200 ) + { + fprintf( stdout, "Cannot visualize AIG with more than 200 nodes.\n" ); + return; + } + if ( (pFile = fopen( pFileName, "w" )) == NULL ) + { + fprintf( stdout, "Cannot open the intermediate file \"%s\".\n", pFileName ); + return; + } + + // mark the nodes + if ( vBold ) + Vec_PtrForEachEntry( vBold, pNode, i ) + pNode->fMarkB = 1; + + // compute levels + LevelMax = 1 + Ivy_ManSetLevels( pMan, fHaig ); + + // write the DOT header + fprintf( pFile, "# %s\n", "AIG structure generated by IVY package" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "digraph AIG {\n" ); + fprintf( pFile, "size = \"7.5,10\";\n" ); +// fprintf( pFile, "ranksep = 0.5;\n" ); +// fprintf( pFile, "nodesep = 0.5;\n" ); + fprintf( pFile, "center = true;\n" ); +// fprintf( pFile, "orientation = landscape;\n" ); +// fprintf( pFile, "edge [fontsize = 10];\n" ); +// fprintf( pFile, "edge [dir = none];\n" ); + fprintf( pFile, "edge [dir = back];\n" ); + fprintf( pFile, "\n" ); + + // labels on the left of the picture + fprintf( pFile, "{\n" ); + fprintf( pFile, " node [shape = plaintext];\n" ); + fprintf( pFile, " edge [style = invis];\n" ); + fprintf( pFile, " LevelTitle1 [label=\"\"];\n" ); + fprintf( pFile, " LevelTitle2 [label=\"\"];\n" ); + // generate node names with labels + for ( Level = LevelMax; Level >= 0; Level-- ) + { + // the visible node name + fprintf( pFile, " Level%d", Level ); + fprintf( pFile, " [label = " ); + // label name + fprintf( pFile, "\"" ); + fprintf( pFile, "\"" ); + fprintf( pFile, "];\n" ); + } + + // genetate the sequence of visible/invisible nodes to mark levels + fprintf( pFile, " LevelTitle1 -> LevelTitle2 ->" ); + for ( Level = LevelMax; Level >= 0; Level-- ) + { + // the visible node name + fprintf( pFile, " Level%d", Level ); + // the connector + if ( Level != 0 ) + fprintf( pFile, " ->" ); + else + fprintf( pFile, ";" ); + } + fprintf( pFile, "\n" ); + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate title box on top + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + fprintf( pFile, " LevelTitle1;\n" ); + fprintf( pFile, " title1 [shape=plaintext,\n" ); + fprintf( pFile, " fontsize=20,\n" ); + fprintf( pFile, " fontname = \"Times-Roman\",\n" ); + fprintf( pFile, " label=\"" ); + fprintf( pFile, "%s", "AIG structure visualized by ABC" ); + fprintf( pFile, "\\n" ); + fprintf( pFile, "Benchmark \\\"%s\\\". ", "aig" ); + fprintf( pFile, "Time was %s. ", Extra_TimeStamp() ); + fprintf( pFile, "\"\n" ); + fprintf( pFile, " ];\n" ); + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate statistics box + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + fprintf( pFile, " LevelTitle2;\n" ); + fprintf( pFile, " title2 [shape=plaintext,\n" ); + fprintf( pFile, " fontsize=18,\n" ); + fprintf( pFile, " fontname = \"Times-Roman\",\n" ); + fprintf( pFile, " label=\"" ); + fprintf( pFile, "The set contains %d logic nodes and spans %d levels.", Ivy_ManNodeNum(pMan), LevelMax ); + fprintf( pFile, "\\n" ); + fprintf( pFile, "\"\n" ); + fprintf( pFile, " ];\n" ); + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate the COs + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + // the labeling node of this level + fprintf( pFile, " Level%d;\n", LevelMax ); + // generate the CO nodes + Ivy_ManForEachCo( pMan, pNode, i ) + { + if ( fHaig || pNode->pEquiv == NULL ) + fprintf( pFile, " Node%d%s [label = \"%d%s\"", pNode->Id, + (Ivy_ObjIsLatch(pNode)? "_in":""), pNode->Id, (Ivy_ObjIsLatch(pNode)? "_in":"") ); + else + fprintf( pFile, " Node%d%s [label = \"%d%s(%d%s)\"", pNode->Id, + (Ivy_ObjIsLatch(pNode)? "_in":""), pNode->Id, (Ivy_ObjIsLatch(pNode)? "_in":""), + Ivy_Regular(pNode->pEquiv)->Id, Ivy_IsComplement(pNode->pEquiv)? "\'":"" ); + fprintf( pFile, ", shape = %s", (Ivy_ObjIsLatch(pNode)? "box":"invtriangle") ); + fprintf( pFile, ", color = coral, fillcolor = coral" ); + fprintf( pFile, "];\n" ); + } + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate nodes of each rank + for ( Level = LevelMax - 1; Level > 0; Level-- ) + { + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + // the labeling node of this level + fprintf( pFile, " Level%d;\n", Level ); + Ivy_ManForEachObj( pMan, pNode, i ) + { + if ( (int)pNode->Level != Level ) + continue; + if ( fHaig || pNode->pEquiv == NULL ) + fprintf( pFile, " Node%d [label = \"%d\"", pNode->Id, pNode->Id ); + else + fprintf( pFile, " Node%d [label = \"%d(%d%s)\"", pNode->Id, pNode->Id, + Ivy_Regular(pNode->pEquiv)->Id, Ivy_IsComplement(pNode->pEquiv)? "\'":"" ); + fprintf( pFile, ", shape = ellipse" ); + if ( vBold && pNode->fMarkB ) + fprintf( pFile, ", style = filled" ); + fprintf( pFile, "];\n" ); + } + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + } + + // generate the CI nodes + fprintf( pFile, "{\n" ); + fprintf( pFile, " rank = same;\n" ); + // the labeling node of this level + fprintf( pFile, " Level%d;\n", 0 ); + // generate constant node + if ( Ivy_ObjRefs(Ivy_ManConst1(pMan)) > 0 ) + { + pNode = Ivy_ManConst1(pMan); + // check if the costant node is present + fprintf( pFile, " Node%d [label = \"Const1\"", pNode->Id ); + fprintf( pFile, ", shape = ellipse" ); + fprintf( pFile, ", color = coral, fillcolor = coral" ); + fprintf( pFile, "];\n" ); + } + // generate the CI nodes + Ivy_ManForEachCi( pMan, pNode, i ) + { + if ( fHaig || pNode->pEquiv == NULL ) + fprintf( pFile, " Node%d%s [label = \"%d%s\"", pNode->Id, + (Ivy_ObjIsLatch(pNode)? "_out":""), pNode->Id, (Ivy_ObjIsLatch(pNode)? "_out":"") ); + else + fprintf( pFile, " Node%d%s [label = \"%d%s(%d%s)\"", pNode->Id, + (Ivy_ObjIsLatch(pNode)? "_out":""), pNode->Id, (Ivy_ObjIsLatch(pNode)? "_out":""), + Ivy_Regular(pNode->pEquiv)->Id, Ivy_IsComplement(pNode->pEquiv)? "\'":"" ); + fprintf( pFile, ", shape = %s", (Ivy_ObjIsLatch(pNode)? "box":"triangle") ); + fprintf( pFile, ", color = coral, fillcolor = coral" ); + fprintf( pFile, "];\n" ); + } + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + + // generate invisible edges from the square down + fprintf( pFile, "title1 -> title2 [style = invis];\n" ); + Ivy_ManForEachCo( pMan, pNode, i ) + fprintf( pFile, "title2 -> Node%d%s [style = invis];\n", pNode->Id, (Ivy_ObjIsLatch(pNode)? "_in":"") ); + + // generate edges + Ivy_ManForEachObj( pMan, pNode, i ) + { + if ( !Ivy_ObjIsNode(pNode) && !Ivy_ObjIsCo(pNode) && !Ivy_ObjIsBuf(pNode) ) + continue; + // generate the edge from this node to the next + fprintf( pFile, "Node%d%s", pNode->Id, (Ivy_ObjIsLatch(pNode)? "_in":"") ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d%s", Ivy_ObjFaninId0(pNode), (Ivy_ObjIsLatch(Ivy_ObjFanin0(pNode))? "_out":"") ); + fprintf( pFile, " [" ); + fprintf( pFile, "style = %s", Ivy_ObjFaninC0(pNode)? "dotted" : "bold" ); +// if ( Ivy_NtkIsSeq(pNode->pMan) && Seq_ObjFaninL0(pNode) > 0 ) +// fprintf( pFile, ", label = \"%s\"", Seq_ObjFaninGetInitPrintable(pNode,0) ); + fprintf( pFile, "]" ); + fprintf( pFile, ";\n" ); + if ( !Ivy_ObjIsNode(pNode) ) + continue; + // generate the edge from this node to the next + fprintf( pFile, "Node%d", pNode->Id ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d%s", Ivy_ObjFaninId1(pNode), (Ivy_ObjIsLatch(Ivy_ObjFanin1(pNode))? "_out":"") ); + fprintf( pFile, " [" ); + fprintf( pFile, "style = %s", Ivy_ObjFaninC1(pNode)? "dotted" : "bold" ); +// if ( Ivy_NtkIsSeq(pNode->pMan) && Seq_ObjFaninL1(pNode) > 0 ) +// fprintf( pFile, ", label = \"%s\"", Seq_ObjFaninGetInitPrintable(pNode,1) ); + fprintf( pFile, "]" ); + fprintf( pFile, ";\n" ); + // generate the edges between the equivalent nodes + if ( fHaig && pNode->pEquiv && Ivy_ObjRefs(pNode) > 0 ) + { + pPrev = pNode; + for ( pTemp = pNode->pEquiv; pTemp != pNode; pTemp = Ivy_Regular(pTemp->pEquiv) ) + { + fprintf( pFile, "Node%d", pPrev->Id ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d", pTemp->Id ); + fprintf( pFile, " [style = %s]", Ivy_IsComplement(pTemp->pEquiv)? "dotted" : "bold" ); + fprintf( pFile, ";\n" ); + pPrev = pTemp; + } + // connect the last node with the first + fprintf( pFile, "Node%d", pPrev->Id ); + fprintf( pFile, " -> " ); + fprintf( pFile, "Node%d", pNode->Id ); + fprintf( pFile, " [style = %s]", Ivy_IsComplement(pPrev->pEquiv)? "dotted" : "bold" ); + fprintf( pFile, ";\n" ); + } + } + + fprintf( pFile, "}" ); + fprintf( pFile, "\n" ); + fprintf( pFile, "\n" ); + fclose( pFile ); + + // unmark nodes + if ( vBold ) + Vec_PtrForEachEntry( vBold, pNode, i ) + pNode->fMarkB = 0; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyTable.c b/src/aig/ivy/ivyTable.c new file mode 100644 index 00000000..2ac0ae49 --- /dev/null +++ b/src/aig/ivy/ivyTable.c @@ -0,0 +1,301 @@ +/**CFile**************************************************************** + + FileName [ivyTable.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Structural hashing table.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006. ] + + Revision [$Id: ivyTable.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// hashing the node +static unsigned Ivy_Hash( Ivy_Obj_t * pObj, int TableSize ) +{ + unsigned Key = Ivy_ObjIsExor(pObj) * 1699; + Key ^= Ivy_ObjFaninId0(pObj) * 7937; + Key ^= Ivy_ObjFaninId1(pObj) * 2971; + Key ^= Ivy_ObjFaninC0(pObj) * 911; + Key ^= Ivy_ObjFaninC1(pObj) * 353; + Key ^= Ivy_ObjInit(pObj) * 911; + return Key % TableSize; +} + +// returns the place where this node is stored (or should be stored) +static int * Ivy_TableFind( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + int i; + assert( Ivy_ObjIsHash(pObj) ); + for ( i = Ivy_Hash(pObj, p->nTableSize); p->pTable[i]; i = (i+1) % p->nTableSize ) + if ( p->pTable[i] == pObj->Id ) + break; + return p->pTable + i; +} + +static void Ivy_TableResize( Ivy_Man_t * p ); +static unsigned int Cudd_PrimeAig( unsigned int p ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Checks if node with the given attributes is in the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_TableLookup( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pEntry; + int i; + assert( !Ivy_IsComplement(pObj) ); + if ( !Ivy_ObjIsHash(pObj) ) + return NULL; + assert( Ivy_ObjIsLatch(pObj) || Ivy_ObjFaninId0(pObj) > 0 ); + assert( Ivy_ObjFaninId1(pObj) == 0 || Ivy_ObjFaninId0(pObj) < Ivy_ObjFaninId1(pObj) ); + if ( Ivy_ObjFanin0(pObj)->nRefs == 0 || (Ivy_ObjChild1(pObj) && Ivy_ObjFanin1(pObj)->nRefs == 0) ) + return NULL; + for ( i = Ivy_Hash(pObj, p->nTableSize); p->pTable[i]; i = (i+1) % p->nTableSize ) + { + pEntry = Ivy_ManObj( p, p->pTable[i] ); + if ( Ivy_ObjChild0(pEntry) == Ivy_ObjChild0(pObj) && + Ivy_ObjChild1(pEntry) == Ivy_ObjChild1(pObj) && + Ivy_ObjInit(pEntry) == Ivy_ObjInit(pObj) && + Ivy_ObjType(pEntry) == Ivy_ObjType(pObj) ) + return pEntry; + } + return NULL; +} + +/**Function************************************************************* + + Synopsis [Adds the node to the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TableInsert( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + int * pPlace; + assert( !Ivy_IsComplement(pObj) ); + if ( !Ivy_ObjIsHash(pObj) ) + return; + if ( (pObj->Id & 63) == 0 ) + { + if ( p->nTableSize < 2 * Ivy_ManHashObjNum(p) ) + Ivy_TableResize( p ); + } + pPlace = Ivy_TableFind( p, pObj ); + assert( *pPlace == 0 ); + *pPlace = pObj->Id; +} + +/**Function************************************************************* + + Synopsis [Deletes the node from the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TableDelete( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pEntry; + int i, * pPlace; + assert( !Ivy_IsComplement(pObj) ); + if ( !Ivy_ObjIsHash(pObj) ) + return; + pPlace = Ivy_TableFind( p, pObj ); + assert( *pPlace == pObj->Id ); // node should be in the table + *pPlace = 0; + // rehash the adjacent entries + i = pPlace - p->pTable; + for ( i = (i+1) % p->nTableSize; p->pTable[i]; i = (i+1) % p->nTableSize ) + { + pEntry = Ivy_ManObj( p, p->pTable[i] ); + p->pTable[i] = 0; + Ivy_TableInsert( p, pEntry ); + } +} + +/**Function************************************************************* + + Synopsis [Updates the table to point to the new node.] + + Description [If the old node (pObj) is in the table, updates the table + to point to an object with different ID (ObjIdNew). The table should + not contain an object with ObjIdNew (this is currently not checked).] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TableUpdate( Ivy_Man_t * p, Ivy_Obj_t * pObj, int ObjIdNew ) +{ + int * pPlace; + assert( !Ivy_IsComplement(pObj) ); + if ( !Ivy_ObjIsHash(pObj) ) + return; + pPlace = Ivy_TableFind( p, pObj ); + assert( *pPlace == pObj->Id ); // node should be in the table + *pPlace = ObjIdNew; +} + +/**Function************************************************************* + + Synopsis [Count the number of nodes in the table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_TableCountEntries( Ivy_Man_t * p ) +{ + int i, Counter = 0; + for ( i = 0; i < p->nTableSize; i++ ) + Counter += (p->pTable[i] != 0); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Resizes the table.] + + Description [Typically this procedure should not be called.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_TableResize( Ivy_Man_t * p ) +{ + int * pTableOld, * pPlace; + int nTableSizeOld, Counter, nEntries, e, clk; +clk = clock(); + // save the old table + pTableOld = p->pTable; + nTableSizeOld = p->nTableSize; + // get the new table + p->nTableSize = Cudd_PrimeAig( 5 * Ivy_ManHashObjNum(p) ); + p->pTable = ALLOC( int, p->nTableSize ); + memset( p->pTable, 0, sizeof(int) * p->nTableSize ); + // rehash the entries from the old table + Counter = 0; + for ( e = 0; e < nTableSizeOld; e++ ) + { + if ( pTableOld[e] == 0 ) + continue; + Counter++; + // get the place where this entry goes in the table table + pPlace = Ivy_TableFind( p, Ivy_ManObj(p, pTableOld[e]) ); + assert( *pPlace == 0 ); // should not be in the table + *pPlace = pTableOld[e]; + } + nEntries = Ivy_ManHashObjNum(p); +// assert( Counter == nEntries ); +// printf( "Increasing the structural table size from %6d to %6d. ", nTableSizeOld, p->nTableSize ); +// PRT( "Time", clock() - clk ); + // replace the table and the parameters + free( pTableOld ); +} + +/**Function******************************************************************** + + Synopsis [Profiles the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Ivy_TableProfile( Ivy_Man_t * p ) +{ + int i, Counter = 0; + for ( i = 0; i < p->nTableSize; i++ ) + { + if ( p->pTable[i] ) + Counter++; + else if ( Counter ) + { + printf( "%d ", Counter ); + Counter = 0; + } + } +} + +/**Function******************************************************************** + + Synopsis [Returns the next prime >= p.] + + Description [Copied from CUDD, for stand-aloneness.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +unsigned int Cudd_PrimeAig( unsigned int p) +{ + int i,pn; + + p--; + do { + p++; + if (p&1) { + pn = 1; + i = 3; + while ((unsigned) (i * i) <= p) { + if (p % i == 0) { + pn = 0; + break; + } + i += 2; + } + } else { + pn = 0; + } + } while (!pn); + return(p); + +} /* end of Cudd_Prime */ + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivyUtil.c b/src/aig/ivy/ivyUtil.c new file mode 100644 index 00000000..ab62a276 --- /dev/null +++ b/src/aig/ivy/ivyUtil.c @@ -0,0 +1,818 @@ +/**CFile**************************************************************** + + FileName [ivyUtil.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Various procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivyUtil.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Increments the current traversal ID of the network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManIncrementTravId( Ivy_Man_t * p ) +{ + if ( p->nTravIds >= (1<<30)-1 - 1000 ) + Ivy_ManCleanTravId( p ); + p->nTravIds++; +} + +/**Function************************************************************* + + Synopsis [Sets the DFS ordering of the nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCleanTravId( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + p->nTravIds = 1; + Ivy_ManForEachObj( p, pObj, i ) + pObj->TravId = 0; +} + +/**Function************************************************************* + + Synopsis [Computes truth table of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCollectCut_rec( Ivy_Man_t * p, Ivy_Obj_t * pNode, Vec_Int_t * vNodes ) +{ + if ( pNode->fMarkA ) + return; + pNode->fMarkA = 1; + assert( Ivy_ObjIsAnd(pNode) || Ivy_ObjIsExor(pNode) ); + Ivy_ManCollectCut_rec( p, Ivy_ObjFanin0(pNode), vNodes ); + Ivy_ManCollectCut_rec( p, Ivy_ObjFanin1(pNode), vNodes ); + Vec_IntPush( vNodes, pNode->Id ); +} + +/**Function************************************************************* + + Synopsis [Computes truth table of the cut.] + + Description [Does not modify the array of leaves. Uses array vTruth to store + temporary truth tables. The returned pointer should be used immediately.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCollectCut( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Int_t * vLeaves, Vec_Int_t * vNodes ) +{ + int i, Leaf; + // collect and mark the leaves + Vec_IntClear( vNodes ); + Vec_IntForEachEntry( vLeaves, Leaf, i ) + { + Vec_IntPush( vNodes, Leaf ); + Ivy_ManObj(p, Leaf)->fMarkA = 1; + } + // collect and mark the nodes + Ivy_ManCollectCut_rec( p, pRoot, vNodes ); + // clean the nodes + Vec_IntForEachEntry( vNodes, Leaf, i ) + Ivy_ManObj(p, Leaf)->fMarkA = 0; +} + +/**Function************************************************************* + + Synopsis [Returns the pointer to the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Ivy_ObjGetTruthStore( int ObjNum, Vec_Int_t * vTruth ) +{ + return ((unsigned *)Vec_IntArray(vTruth)) + 8 * ObjNum; +} + +/**Function************************************************************* + + Synopsis [Computes truth table of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManCutTruthOne( Ivy_Man_t * p, Ivy_Obj_t * pNode, Vec_Int_t * vTruth, int nWords ) +{ + unsigned * pTruth, * pTruth0, * pTruth1; + int i; + pTruth = Ivy_ObjGetTruthStore( pNode->TravId, vTruth ); + pTruth0 = Ivy_ObjGetTruthStore( Ivy_ObjFanin0(pNode)->TravId, vTruth ); + pTruth1 = Ivy_ObjGetTruthStore( Ivy_ObjFanin1(pNode)->TravId, vTruth ); + if ( Ivy_ObjIsExor(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = pTruth0[i] ^ pTruth1[i]; + else if ( !Ivy_ObjFaninC0(pNode) && !Ivy_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = pTruth0[i] & pTruth1[i]; + else if ( !Ivy_ObjFaninC0(pNode) && Ivy_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = pTruth0[i] & ~pTruth1[i]; + else if ( Ivy_ObjFaninC0(pNode) && !Ivy_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ~pTruth0[i] & pTruth1[i]; + else // if ( Ivy_ObjFaninC0(pNode) && Ivy_ObjFaninC1(pNode) ) + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ~pTruth0[i] & ~pTruth1[i]; +} + +/**Function************************************************************* + + Synopsis [Computes truth table of the cut.] + + Description [Does not modify the array of leaves. Uses array vTruth to store + temporary truth tables. The returned pointer should be used immediately.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Ivy_ManCutTruth( Ivy_Man_t * p, Ivy_Obj_t * pRoot, Vec_Int_t * vLeaves, Vec_Int_t * vNodes, Vec_Int_t * vTruth ) +{ + static unsigned uTruths[8][8] = { // elementary truth tables + { 0xAAAAAAAA,0xAAAAAAAA,0xAAAAAAAA,0xAAAAAAAA,0xAAAAAAAA,0xAAAAAAAA,0xAAAAAAAA,0xAAAAAAAA }, + { 0xCCCCCCCC,0xCCCCCCCC,0xCCCCCCCC,0xCCCCCCCC,0xCCCCCCCC,0xCCCCCCCC,0xCCCCCCCC,0xCCCCCCCC }, + { 0xF0F0F0F0,0xF0F0F0F0,0xF0F0F0F0,0xF0F0F0F0,0xF0F0F0F0,0xF0F0F0F0,0xF0F0F0F0,0xF0F0F0F0 }, + { 0xFF00FF00,0xFF00FF00,0xFF00FF00,0xFF00FF00,0xFF00FF00,0xFF00FF00,0xFF00FF00,0xFF00FF00 }, + { 0xFFFF0000,0xFFFF0000,0xFFFF0000,0xFFFF0000,0xFFFF0000,0xFFFF0000,0xFFFF0000,0xFFFF0000 }, + { 0x00000000,0xFFFFFFFF,0x00000000,0xFFFFFFFF,0x00000000,0xFFFFFFFF,0x00000000,0xFFFFFFFF }, + { 0x00000000,0x00000000,0xFFFFFFFF,0xFFFFFFFF,0x00000000,0x00000000,0xFFFFFFFF,0xFFFFFFFF }, + { 0x00000000,0x00000000,0x00000000,0x00000000,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF } + }; + int i, Leaf; + // collect the cut + Ivy_ManCollectCut( p, pRoot, vLeaves, vNodes ); + // set the node numbers + Vec_IntForEachEntry( vNodes, Leaf, i ) + Ivy_ManObj(p, Leaf)->TravId = i; + // alloc enough memory + Vec_IntClear( vTruth ); + Vec_IntGrow( vTruth, 8 * Vec_IntSize(vNodes) ); + // set the elementary truth tables + Vec_IntForEachEntry( vLeaves, Leaf, i ) + memcpy( Ivy_ObjGetTruthStore(i, vTruth), uTruths[i], 8 * sizeof(unsigned) ); + // compute truths for other nodes + Vec_IntForEachEntryStart( vNodes, Leaf, i, Vec_IntSize(vLeaves) ) + Ivy_ManCutTruthOne( p, Ivy_ManObj(p, Leaf), vTruth, 8 ); + return Ivy_ObjGetTruthStore( pRoot->TravId, vTruth ); +} + +/**Function************************************************************* + + Synopsis [Collect the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Ivy_ManLatches( Ivy_Man_t * p ) +{ + Vec_Int_t * vLatches; + Ivy_Obj_t * pObj; + int i; + vLatches = Vec_IntAlloc( Ivy_ManLatchNum(p) ); + Ivy_ManForEachLatch( p, pObj, i ) + Vec_IntPush( vLatches, pObj->Id ); + return vLatches; +} + +/**Function************************************************************* + + Synopsis [Collect the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManLevels( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i, LevelMax = 0; + Ivy_ManForEachPo( p, pObj, i ) + LevelMax = IVY_MAX( LevelMax, (int)Ivy_ObjFanin0(pObj)->Level ); + return LevelMax; +} + +/**Function************************************************************* + + Synopsis [Collect the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ManResetLevels_rec( Ivy_Obj_t * pObj ) +{ + if ( pObj->Level || Ivy_ObjIsCi(pObj) || Ivy_ObjIsConst1(pObj) ) + return pObj->Level; + if ( Ivy_ObjIsBuf(pObj) ) + return pObj->Level = Ivy_ManResetLevels_rec( Ivy_ObjFanin0(pObj) ); + assert( Ivy_ObjIsNode(pObj) ); + Ivy_ManResetLevels_rec( Ivy_ObjFanin0(pObj) ); + Ivy_ManResetLevels_rec( Ivy_ObjFanin1(pObj) ); + return pObj->Level = Ivy_ObjLevelNew( pObj ); +} + +/**Function************************************************************* + + Synopsis [Collect the latches.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManResetLevels( Ivy_Man_t * p ) +{ + Ivy_Obj_t * pObj; + int i; + Ivy_ManForEachObj( p, pObj, i ) + pObj->Level = 0; + Ivy_ManForEachCo( p, pObj, i ) + Ivy_ManResetLevels_rec( Ivy_ObjFanin0(pObj) ); +} + +/**Function************************************************************* + + Synopsis [References/references the node and returns MFFC size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ObjRefDeref( Ivy_Man_t * p, Ivy_Obj_t * pNode, int fReference, int fLabel ) +{ + Ivy_Obj_t * pNode0, * pNode1; + int Counter; + // label visited nodes + if ( fLabel ) + Ivy_ObjSetTravIdCurrent( p, pNode ); + // skip the CI + if ( Ivy_ObjIsPi(pNode) ) + return 0; + assert( Ivy_ObjIsNode(pNode) || Ivy_ObjIsBuf(pNode) || Ivy_ObjIsLatch(pNode) ); + // process the internal node + pNode0 = Ivy_ObjFanin0(pNode); + pNode1 = Ivy_ObjFanin1(pNode); + Counter = Ivy_ObjIsNode(pNode); + if ( fReference ) + { + if ( pNode0->nRefs++ == 0 ) + Counter += Ivy_ObjRefDeref( p, pNode0, fReference, fLabel ); + if ( pNode1 && pNode1->nRefs++ == 0 ) + Counter += Ivy_ObjRefDeref( p, pNode1, fReference, fLabel ); + } + else + { + assert( pNode0->nRefs > 0 ); + assert( pNode1 == NULL || pNode1->nRefs > 0 ); + if ( --pNode0->nRefs == 0 ) + Counter += Ivy_ObjRefDeref( p, pNode0, fReference, fLabel ); + if ( pNode1 && --pNode1->nRefs == 0 ) + Counter += Ivy_ObjRefDeref( p, pNode1, fReference, fLabel ); + } + return Counter; +} + + +/**Function************************************************************* + + Synopsis [Labels MFFC with the current label.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ObjMffcLabel( Ivy_Man_t * p, Ivy_Obj_t * pNode ) +{ + int nConeSize1, nConeSize2; + assert( !Ivy_IsComplement( pNode ) ); + assert( Ivy_ObjIsNode( pNode ) ); + nConeSize1 = Ivy_ObjRefDeref( p, pNode, 0, 1 ); // dereference + nConeSize2 = Ivy_ObjRefDeref( p, pNode, 1, 0 ); // reference + assert( nConeSize1 == nConeSize2 ); + assert( nConeSize1 > 0 ); + return nConeSize1; +} + +/**Function************************************************************* + + Synopsis [Recursively updates fanout levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjUpdateLevel_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pFanout; + Vec_Ptr_t * vFanouts; + int i, LevelNew; + assert( p->fFanout ); + assert( Ivy_ObjIsNode(pObj) ); + vFanouts = Vec_PtrAlloc( 10 ); + Ivy_ObjForEachFanout( p, pObj, vFanouts, pFanout, i ) + { + if ( Ivy_ObjIsCo(pFanout) ) + { +// assert( (int)Ivy_ObjFanin0(pFanout)->Level <= p->nLevelMax ); + continue; + } + LevelNew = Ivy_ObjLevelNew( pFanout ); + if ( (int)pFanout->Level == LevelNew ) + continue; + pFanout->Level = LevelNew; + Ivy_ObjUpdateLevel_rec( p, pFanout ); + } + Vec_PtrFree( vFanouts ); +} + +/**Function************************************************************* + + Synopsis [Compute the new required level.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ObjLevelRNew( Ivy_Man_t * p, Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pFanout; + Vec_Ptr_t * vFanouts; + int i, Required, LevelNew = 1000000; + assert( p->fFanout && p->vRequired ); + vFanouts = Vec_PtrAlloc( 10 ); + Ivy_ObjForEachFanout( p, pObj, vFanouts, pFanout, i ) + { + Required = Vec_IntEntry(p->vRequired, pFanout->Id); + LevelNew = IVY_MIN( LevelNew, Required ); + } + Vec_PtrFree( vFanouts ); + return LevelNew - 1; +} + +/**Function************************************************************* + + Synopsis [Recursively updates fanout levels.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjUpdateLevelR_rec( Ivy_Man_t * p, Ivy_Obj_t * pObj, int ReqNew ) +{ + Ivy_Obj_t * pFanin; + if ( Ivy_ObjIsConst1(pObj) || Ivy_ObjIsCi(pObj) ) + return; + assert( Ivy_ObjIsNode(pObj) || Ivy_ObjIsBuf(pObj) ); + // process the first fanin + pFanin = Ivy_ObjFanin0(pObj); + if ( Vec_IntEntry(p->vRequired, pFanin->Id) > ReqNew - 1 ) + { + Vec_IntWriteEntry( p->vRequired, pFanin->Id, ReqNew - 1 ); + Ivy_ObjUpdateLevelR_rec( p, pFanin, ReqNew - 1 ); + } + if ( Ivy_ObjIsBuf(pObj) ) + return; + // process the second fanin + pFanin = Ivy_ObjFanin1(pObj); + if ( Vec_IntEntry(p->vRequired, pFanin->Id) > ReqNew - 1 ) + { + Vec_IntWriteEntry( p->vRequired, pFanin->Id, ReqNew - 1 ); + Ivy_ObjUpdateLevelR_rec( p, pFanin, ReqNew - 1 ); + } +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the node is the root of MUX or EXOR/NEXOR.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_ObjIsMuxType( Ivy_Obj_t * pNode ) +{ + Ivy_Obj_t * pNode0, * pNode1; + // check that the node is regular + assert( !Ivy_IsComplement(pNode) ); + // if the node is not AND, this is not MUX + if ( !Ivy_ObjIsAnd(pNode) ) + return 0; + // if the children are not complemented, this is not MUX + if ( !Ivy_ObjFaninC0(pNode) || !Ivy_ObjFaninC1(pNode) ) + return 0; + // get children + pNode0 = Ivy_ObjFanin0(pNode); + pNode1 = Ivy_ObjFanin1(pNode); + // if the children are not ANDs, this is not MUX + if ( !Ivy_ObjIsAnd(pNode0) || !Ivy_ObjIsAnd(pNode1) ) + return 0; + // otherwise the node is MUX iff it has a pair of equal grandchildren + return (Ivy_ObjFaninId0(pNode0) == Ivy_ObjFaninId0(pNode1) && (Ivy_ObjFaninC0(pNode0) ^ Ivy_ObjFaninC0(pNode1))) || + (Ivy_ObjFaninId0(pNode0) == Ivy_ObjFaninId1(pNode1) && (Ivy_ObjFaninC0(pNode0) ^ Ivy_ObjFaninC1(pNode1))) || + (Ivy_ObjFaninId1(pNode0) == Ivy_ObjFaninId0(pNode1) && (Ivy_ObjFaninC1(pNode0) ^ Ivy_ObjFaninC0(pNode1))) || + (Ivy_ObjFaninId1(pNode0) == Ivy_ObjFaninId1(pNode1) && (Ivy_ObjFaninC1(pNode0) ^ Ivy_ObjFaninC1(pNode1))); +} + +/**Function************************************************************* + + Synopsis [Recognizes what nodes are control and data inputs of a MUX.] + + Description [If the node is a MUX, returns the control variable C. + Assigns nodes T and E to be the then and else variables of the MUX. + Node C is never complemented. Nodes T and E can be complemented. + This function also recognizes EXOR/NEXOR gates as MUXes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ObjRecognizeMux( Ivy_Obj_t * pNode, Ivy_Obj_t ** ppNodeT, Ivy_Obj_t ** ppNodeE ) +{ + Ivy_Obj_t * pNode0, * pNode1; + assert( !Ivy_IsComplement(pNode) ); + assert( Ivy_ObjIsMuxType(pNode) ); + // get children + pNode0 = Ivy_ObjFanin0(pNode); + pNode1 = Ivy_ObjFanin1(pNode); + // find the control variable +// if ( pNode1->p1 == Fraig_Not(pNode2->p1) ) + if ( Ivy_ObjFaninId0(pNode0) == Ivy_ObjFaninId0(pNode1) && (Ivy_ObjFaninC0(pNode0) ^ Ivy_ObjFaninC0(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p1) ) + if ( Ivy_ObjFaninC0(pNode0) ) + { // pNode2->p1 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild1(pNode1));//pNode2->p2); + *ppNodeE = Ivy_Not(Ivy_ObjChild1(pNode0));//pNode1->p2); + return Ivy_ObjChild0(pNode1);//pNode2->p1; + } + else + { // pNode1->p1 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild1(pNode0));//pNode1->p2); + *ppNodeE = Ivy_Not(Ivy_ObjChild1(pNode1));//pNode2->p2); + return Ivy_ObjChild0(pNode0);//pNode1->p1; + } + } +// else if ( pNode1->p1 == Fraig_Not(pNode2->p2) ) + else if ( Ivy_ObjFaninId0(pNode0) == Ivy_ObjFaninId1(pNode1) && (Ivy_ObjFaninC0(pNode0) ^ Ivy_ObjFaninC1(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p1) ) + if ( Ivy_ObjFaninC0(pNode0) ) + { // pNode2->p2 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild0(pNode1));//pNode2->p1); + *ppNodeE = Ivy_Not(Ivy_ObjChild1(pNode0));//pNode1->p2); + return Ivy_ObjChild1(pNode1);//pNode2->p2; + } + else + { // pNode1->p1 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild1(pNode0));//pNode1->p2); + *ppNodeE = Ivy_Not(Ivy_ObjChild0(pNode1));//pNode2->p1); + return Ivy_ObjChild0(pNode0);//pNode1->p1; + } + } +// else if ( pNode1->p2 == Fraig_Not(pNode2->p1) ) + else if ( Ivy_ObjFaninId1(pNode0) == Ivy_ObjFaninId0(pNode1) && (Ivy_ObjFaninC1(pNode0) ^ Ivy_ObjFaninC0(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p2) ) + if ( Ivy_ObjFaninC1(pNode0) ) + { // pNode2->p1 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild1(pNode1));//pNode2->p2); + *ppNodeE = Ivy_Not(Ivy_ObjChild0(pNode0));//pNode1->p1); + return Ivy_ObjChild0(pNode1);//pNode2->p1; + } + else + { // pNode1->p2 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild0(pNode0));//pNode1->p1); + *ppNodeE = Ivy_Not(Ivy_ObjChild1(pNode1));//pNode2->p2); + return Ivy_ObjChild1(pNode0);//pNode1->p2; + } + } +// else if ( pNode1->p2 == Fraig_Not(pNode2->p2) ) + else if ( Ivy_ObjFaninId1(pNode0) == Ivy_ObjFaninId1(pNode1) && (Ivy_ObjFaninC1(pNode0) ^ Ivy_ObjFaninC1(pNode1)) ) + { +// if ( Fraig_IsComplement(pNode1->p2) ) + if ( Ivy_ObjFaninC1(pNode0) ) + { // pNode2->p2 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild0(pNode1));//pNode2->p1); + *ppNodeE = Ivy_Not(Ivy_ObjChild0(pNode0));//pNode1->p1); + return Ivy_ObjChild1(pNode1);//pNode2->p2; + } + else + { // pNode1->p2 is positive phase of C + *ppNodeT = Ivy_Not(Ivy_ObjChild0(pNode0));//pNode1->p1); + *ppNodeE = Ivy_Not(Ivy_ObjChild0(pNode1));//pNode2->p1); + return Ivy_ObjChild1(pNode0);//pNode1->p2; + } + } + assert( 0 ); // this is not MUX + return NULL; +} + +/**Function************************************************************* + + Synopsis [Returns the real fanin.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Obj_t * Ivy_ObjReal( Ivy_Obj_t * pObj ) +{ + Ivy_Obj_t * pFanin; + if ( pObj == NULL || !Ivy_ObjIsBuf( Ivy_Regular(pObj) ) ) + return pObj; + pFanin = Ivy_ObjReal( Ivy_ObjChild0(Ivy_Regular(pObj)) ); + return Ivy_NotCond( pFanin, Ivy_IsComplement(pObj) ); +} + +/**Function************************************************************* + + Synopsis [Prints node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ObjPrintVerbose( Ivy_Man_t * p, Ivy_Obj_t * pObj, int fHaig ) +{ + Ivy_Obj_t * pTemp; + int fShowFanouts = 0; + assert( !Ivy_IsComplement(pObj) ); + printf( "Node %5d : ", Ivy_ObjId(pObj) ); + if ( Ivy_ObjIsConst1(pObj) ) + printf( "constant 1" ); + else if ( Ivy_ObjIsPi(pObj) ) + printf( "PI" ); + else if ( Ivy_ObjIsPo(pObj) ) + printf( "PO" ); + else if ( Ivy_ObjIsLatch(pObj) ) + printf( "latch (%d%s)", Ivy_ObjFanin0(pObj)->Id, (Ivy_ObjFaninC0(pObj)? "\'" : " ") ); + else if ( Ivy_ObjIsBuf(pObj) ) + printf( "buffer (%d%s)", Ivy_ObjFanin0(pObj)->Id, (Ivy_ObjFaninC0(pObj)? "\'" : " ") ); + else + printf( "AND( %5d%s, %5d%s )", + Ivy_ObjFanin0(pObj)->Id, (Ivy_ObjFaninC0(pObj)? "\'" : " "), + Ivy_ObjFanin1(pObj)->Id, (Ivy_ObjFaninC1(pObj)? "\'" : " ") ); + printf( " (refs = %3d)", Ivy_ObjRefs(pObj) ); + if ( fShowFanouts ) + { + Vec_Ptr_t * vFanouts; + Ivy_Obj_t * pFanout; + int i; + vFanouts = Vec_PtrAlloc( 10 ); + printf( "\nFanouts:\n" ); + Ivy_ObjForEachFanout( p, pObj, vFanouts, pFanout, i ) + { + printf( " " ); + printf( "Node %5d : ", Ivy_ObjId(pFanout) ); + if ( Ivy_ObjIsPo(pFanout) ) + printf( "PO" ); + else if ( Ivy_ObjIsLatch(pFanout) ) + printf( "latch (%d%s)", Ivy_ObjFanin0(pFanout)->Id, (Ivy_ObjFaninC0(pFanout)? "\'" : " ") ); + else if ( Ivy_ObjIsBuf(pFanout) ) + printf( "buffer (%d%s)", Ivy_ObjFanin0(pFanout)->Id, (Ivy_ObjFaninC0(pFanout)? "\'" : " ") ); + else + printf( "AND( %5d%s, %5d%s )", + Ivy_ObjFanin0(pFanout)->Id, (Ivy_ObjFaninC0(pFanout)? "\'" : " "), + Ivy_ObjFanin1(pFanout)->Id, (Ivy_ObjFaninC1(pFanout)? "\'" : " ") ); + printf( "\n" ); + } + Vec_PtrFree( vFanouts ); + return; + } + if ( !fHaig ) + { + if ( pObj->pEquiv == NULL ) + printf( " HAIG node not given" ); + else + printf( " HAIG node = %d%s", Ivy_Regular(pObj->pEquiv)->Id, (Ivy_IsComplement(pObj->pEquiv)? "\'" : " ") ); + return; + } + if ( pObj->pEquiv == NULL ) + return; + // there are choices + if ( Ivy_ObjRefs(pObj) > 0 ) + { + // print equivalence class + printf( " { %5d ", pObj->Id ); + assert( !Ivy_IsComplement(pObj->pEquiv) ); + for ( pTemp = pObj->pEquiv; pTemp != pObj; pTemp = Ivy_Regular(pTemp->pEquiv) ) + printf( " %5d%s", pTemp->Id, (Ivy_IsComplement(pTemp->pEquiv)? "\'" : " ") ); + printf( " }" ); + return; + } + // this is a secondary node + for ( pTemp = Ivy_Regular(pObj->pEquiv); Ivy_ObjRefs(pTemp) == 0; pTemp = Ivy_Regular(pTemp->pEquiv) ); + assert( Ivy_ObjRefs(pTemp) > 0 ); + printf( " class of %d", pTemp->Id ); +} + +/**Function************************************************************* + + Synopsis [Prints node in HAIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_ManPrintVerbose( Ivy_Man_t * p, int fHaig ) +{ + Vec_Int_t * vNodes; + Ivy_Obj_t * pObj; + int i; + printf( "PIs: " ); + Ivy_ManForEachPi( p, pObj, i ) + printf( " %d", pObj->Id ); + printf( "\n" ); + printf( "POs: " ); + Ivy_ManForEachPo( p, pObj, i ) + printf( " %d", pObj->Id ); + printf( "\n" ); + printf( "Latches: " ); + Ivy_ManForEachLatch( p, pObj, i ) + printf( " %d=%d%s", pObj->Id, Ivy_ObjFanin0(pObj)->Id, (Ivy_ObjFaninC0(pObj)? "\'" : " ") ); + printf( "\n" ); + vNodes = Ivy_ManDfsSeq( p, NULL ); + Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) + Ivy_ObjPrintVerbose( p, pObj, fHaig ), printf( "\n" ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Performs incremental rewriting of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_CutTruthPrint2( Ivy_Man_t * p, Ivy_Cut_t * pCut, unsigned uTruth ) +{ + int i; + printf( "Trying cut : {" ); + for ( i = 0; i < pCut->nSize; i++ ) + printf( " %6d(%d)", Ivy_LeafId(pCut->pArray[i]), Ivy_LeafLat(pCut->pArray[i]) ); + printf( " } " ); + Extra_PrintBinary( stdout, &uTruth, 16 ); printf( "\n" ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Performs incremental rewriting of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_CutTruthPrint( Ivy_Man_t * p, Ivy_Cut_t * pCut, unsigned uTruth ) +{ + Vec_Ptr_t * vArray; + Ivy_Obj_t * pObj, * pFanout; + int nLatches = 0; + int nPresent = 0; + int i, k; + int fVerbose = 0; + + if ( fVerbose ) + printf( "Trying cut : {" ); + for ( i = 0; i < pCut->nSize; i++ ) + { + if ( fVerbose ) + printf( " %6d(%d)", Ivy_LeafId(pCut->pArray[i]), Ivy_LeafLat(pCut->pArray[i]) ); + nLatches += Ivy_LeafLat(pCut->pArray[i]); + } + if ( fVerbose ) + printf( " } " ); + if ( fVerbose ) + printf( "Latches = %d. ", nLatches ); + + // check if there are latches on the fanout edges + vArray = Vec_PtrAlloc( 100 ); + for ( i = 0; i < pCut->nSize; i++ ) + { + pObj = Ivy_ManObj( p, Ivy_LeafId(pCut->pArray[i]) ); + Ivy_ObjForEachFanout( p, pObj, vArray, pFanout, k ) + { + if ( Ivy_ObjIsLatch(pFanout) ) + { + nPresent++; + break; + } + } + } + Vec_PtrSize( vArray ); + if ( fVerbose ) + { + printf( "Present = %d. ", nPresent ); + if ( nLatches > nPresent ) + printf( "Clauses = %d. ", 2*(nLatches - nPresent) ); + printf( "\n" ); + } + return ( nLatches > nPresent ) ? 2*(nLatches - nPresent) : 0; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/ivy_.c b/src/aig/ivy/ivy_.c new file mode 100644 index 00000000..65689689 --- /dev/null +++ b/src/aig/ivy/ivy_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [ivy_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$Id: ivy_.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "ivy.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/ivy/module.make b/src/aig/ivy/module.make new file mode 100644 index 00000000..daef43df --- /dev/null +++ b/src/aig/ivy/module.make @@ -0,0 +1,22 @@ +SRC += src/aig/ivy/ivyBalance.c \ + src/aig/ivy/ivyCanon.c \ + src/aig/ivy/ivyCheck.c \ + src/aig/ivy/ivyCut.c \ + src/aig/ivy/ivyCutTrav.c \ + src/aig/ivy/ivyDfs.c \ + src/aig/ivy/ivyDsd.c \ + src/aig/ivy/ivyFanout.c \ + src/aig/ivy/ivyFastMap.c \ + src/aig/ivy/ivyFraig.c \ + src/aig/ivy/ivyHaig.c \ + src/aig/ivy/ivyMan.c \ + src/aig/ivy/ivyMem.c \ + src/aig/ivy/ivyMulti.c \ + src/aig/ivy/ivyObj.c \ + src/aig/ivy/ivyOper.c \ + src/aig/ivy/ivyResyn.c \ + src/aig/ivy/ivyRwr.c \ + src/aig/ivy/ivySeq.c \ + src/aig/ivy/ivyShow.c \ + src/aig/ivy/ivyTable.c \ + src/aig/ivy/ivyUtil.c diff --git a/src/aig/kit/cloud.c b/src/aig/kit/cloud.c new file mode 100644 index 00000000..6e6691f0 --- /dev/null +++ b/src/aig/kit/cloud.c @@ -0,0 +1,987 @@ +/**CFile**************************************************************** + + FileName [cloudCore.c] + + PackageName [Fast application-specific BDD package.] + + Synopsis [The package core.] + + Author [Alan Mishchenko <alanmi@ece.pdx.edu>] + + Affiliation [ECE Department. Portland State University, Portland, Oregon.] + + Date [Ver. 1.0. Started - June 10, 2002.] + + Revision [$Id: cloudCore.c,v 1.0 2002/06/10 03:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cloud.h" + +// the number of operators using cache +static int CacheOperNum = 4; + +// the ratio of cache size to the unique table size for each operator +static int CacheLogRatioDefault[4] = { + 2, // CLOUD_OPER_AND, + 8, // CLOUD_OPER_XOR, + 8, // CLOUD_OPER_BDIFF, + 8 // CLOUD_OPER_LEQ +}; + +// the ratio of cache size to the unique table size for each operator +static int CacheSize[4] = { + 2, // CLOUD_OPER_AND, + 2, // CLOUD_OPER_XOR, + 2, // CLOUD_OPER_BDIFF, + 2 // CLOUD_OPER_LEQ +}; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// static functions +static CloudNode * cloudMakeNode( CloudManager * dd, CloudVar v, CloudNode * t, CloudNode * e ); +static void cloudCacheAllocate( CloudManager * dd, CloudOper oper ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function******************************************************************** + + Synopsis [Starts the cloud manager.] + + Description [The first arguments is the number of elementary variables used. + The second arguments is the number of bits of the unsigned integer used to + represent nodes in the unique table. If the second argument is 0, the package + assumes 23 to represent nodes, which is equivalent to 2^23 = 8,388,608 nodes.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudManager * Cloud_Init( int nVars, int nBits ) +{ + CloudManager * dd; + int i; + int clk1, clk2; + + assert( nVars <= 100000 ); + assert( nBits < 32 ); + + // assign the defaults + if ( nBits == 0 ) + nBits = CLOUD_NODE_BITS; + + // start the manager + dd = CALLOC( CloudManager, 1 ); + dd->nMemUsed += sizeof(CloudManager); + + // variables + dd->nVars = nVars; // the number of variables allocated + // bits + dd->bitsNode = nBits; // the number of bits used for the node + for ( i = 0; i < CacheOperNum; i++ ) + dd->bitsCache[i] = nBits - CacheLogRatioDefault[i]; + // shifts + dd->shiftUnique = 8*sizeof(unsigned) - (nBits + 1); // gets node index in the hash table + for ( i = 0; i < CacheOperNum; i++ ) + dd->shiftCache[i] = 8*sizeof(unsigned) - dd->bitsCache[i]; + // nodes + dd->nNodesAlloc = (1 << (nBits + 1)); // 2 ^ (nBits + 1) + dd->nNodesLimit = (1 << nBits); // 2 ^ nBits + + // unique table +clk1 = clock(); + dd->tUnique = CALLOC( CloudNode, dd->nNodesAlloc ); + dd->nMemUsed += sizeof(CloudNode) * dd->nNodesAlloc; +clk2 = clock(); +//PRT( "calloc() time", clk2 - clk1 ); + + // set up the constant node (the only node that is not in the hash table) + dd->nSignCur = 1; + dd->tUnique[0].s = dd->nSignCur; + dd->tUnique[0].v = CLOUD_CONST_INDEX; + dd->tUnique[0].e = CLOUD_VOID; + dd->tUnique[0].t = CLOUD_VOID; + dd->one = dd->tUnique; + dd->zero = Cloud_Not(dd->one); + dd->nNodesCur = 1; + + // special nodes + dd->pNodeStart = dd->tUnique + 1; + dd->pNodeEnd = dd->tUnique + dd->nNodesAlloc; + + // set up the elementary variables + dd->vars = ALLOC( CloudNode *, dd->nVars ); + dd->nMemUsed += sizeof(CloudNode *) * dd->nVars; + for ( i = 0; i < dd->nVars; i++ ) + dd->vars[i] = cloudMakeNode( dd, i, dd->one, dd->zero ); + + return dd; +}; + +/**Function******************************************************************** + + Synopsis [Stops the cloud manager.] + + Description [The first arguments tells show many elementary variables are used. + The second arguments tells how many bits of the unsigned integer are used + to represent regular nodes in the unique table.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Cloud_Quit( CloudManager * dd ) +{ + int i; + FREE( dd->ppNodes ); + free( dd->tUnique ); + free( dd->vars ); + for ( i = 0; i < 4; i++ ) + FREE( dd->tCaches[i] ); + free( dd ); +} + +/**Function******************************************************************** + + Synopsis [Prepares the manager for another run.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Cloud_Restart( CloudManager * dd ) +{ + int i; + assert( dd->one->s == dd->nSignCur ); + dd->nSignCur++; + dd->one->s++; + for ( i = 0; i < dd->nVars; i++ ) + dd->vars[i]->s++; + dd->nNodesCur = 1 + dd->nVars; +} + +/**Function******************************************************************** + + Synopsis [This optional function allocates operation cache of the given size.] + + Description [Cache for each operation is allocated independently when the first + operation of the given type is performed. The user can allocate cache of his/her + preferred size by calling Cloud_CacheAllocate before the first operation of the + given type is performed, but this call is optional. Argument "logratio" gives + the binary logarithm of the ratio of the size of the unique table to that of cache. + For example, if "logratio" is equal to 3, and the unique table will be 2^3=8 times + larger than cache; so, if unique table is 2^23 = 8,388,608 nodes, the cache size + will be 2^3=8 times smaller and equal to 2^20 = 1,048,576 entries.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Cloud_CacheAllocate( CloudManager * dd, CloudOper oper, int logratio ) +{ + assert( logratio > 0 ); // cache cannot be larger than the unique table + assert( logratio < dd->bitsNode ); // cache cannot be smaller than 2 entries + + if ( logratio ) + { + dd->bitsCache[oper] = dd->bitsNode - logratio; + dd->shiftCache[oper] = 8*sizeof(unsigned) - dd->bitsCache[oper]; + } + cloudCacheAllocate( dd, oper ); +} + +/**Function******************************************************************** + + Synopsis [Internal cache allocation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void cloudCacheAllocate( CloudManager * dd, CloudOper oper ) +{ + int nCacheEntries = (1 << dd->bitsCache[oper]); + + if ( CacheSize[oper] == 1 ) + { + dd->tCaches[oper] = (CloudCacheEntry2 *)CALLOC( CloudCacheEntry1, nCacheEntries ); + dd->nMemUsed += sizeof(CloudCacheEntry1) * nCacheEntries; + } + else if ( CacheSize[oper] == 2 ) + { + dd->tCaches[oper] = (CloudCacheEntry2 *)CALLOC( CloudCacheEntry2, nCacheEntries ); + dd->nMemUsed += sizeof(CloudCacheEntry2) * nCacheEntries; + } + else if ( CacheSize[oper] == 3 ) + { + dd->tCaches[oper] = (CloudCacheEntry2 *)CALLOC( CloudCacheEntry3, nCacheEntries ); + dd->nMemUsed += sizeof(CloudCacheEntry3) * nCacheEntries; + } +} + + + +/**Function******************************************************************** + + Synopsis [Returns or creates a new node] + + Description [Checks the unique table for the existance of the node. If the node is + present, returns the node. If the node is absent, creates a new node.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Cloud_MakeNode( CloudManager * dd, CloudVar v, CloudNode * t, CloudNode * e ) +{ + CloudNode * pRes; + CLOUD_ASSERT(t); + CLOUD_ASSERT(e); + assert( v < Cloud_V(t) && v < Cloud_V(e) ); // variable should be above in the order + if ( Cloud_IsComplement(t) ) + { + pRes = cloudMakeNode( dd, v, Cloud_Not(t), Cloud_Not(e) ); + if ( pRes != CLOUD_VOID ) + pRes = Cloud_Not(pRes); + } + else + pRes = cloudMakeNode( dd, v, t, e ); + return pRes; +} + +/**Function******************************************************************** + + Synopsis [Returns or creates a new node] + + Description [Checks the unique table for the existance of the node. If the node is + present, returns the node. If the node is absent, creates a new node.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * cloudMakeNode( CloudManager * dd, CloudVar v, CloudNode * t, CloudNode * e ) +{ + CloudNode * entryUnique; + + CLOUD_ASSERT(t); + CLOUD_ASSERT(e); + + assert( ((int)v) >= 0 && ((int)v) < dd->nVars ); // the variable must be in the range + assert( v < Cloud_V(t) && v < Cloud_V(e) ); // variable should be above in the order + assert( !Cloud_IsComplement(t) ); // the THEN edge must not be complemented + + // make sure we are not searching for the constant node + assert( t && e ); + + // get the unique entry + entryUnique = dd->tUnique + cloudHashCudd3(v, t, e, dd->shiftUnique); + while ( entryUnique->s == dd->nSignCur ) + { + // compare the node + if ( entryUnique->v == v && entryUnique->t == t && entryUnique->e == e ) + { // the node is found + dd->nUniqueHits++; + return entryUnique; // returns the node + } + // increment the hash value modulus the hash table size + if ( ++entryUnique - dd->tUnique == dd->nNodesAlloc ) + entryUnique = dd->tUnique + 1; + // increment the number of steps through the table + dd->nUniqueSteps++; + } + dd->nUniqueMisses++; + + // check if the new node can be created + if ( ++dd->nNodesCur == dd->nNodesLimit ) + { // initiate the restart + printf( "Cloud needs restart!\n" ); +// fflush( stdout ); +// exit(1); + return CLOUD_VOID; + } + // create the node + entryUnique->s = dd->nSignCur; + entryUnique->v = v; + entryUnique->t = t; + entryUnique->e = e; + return entryUnique; // returns the node +} + + +/**Function******************************************************************** + + Synopsis [Performs the AND or two BDDs] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * cloudBddAnd( CloudManager * dd, CloudNode * f, CloudNode * g ) +{ + CloudNode * F, * G, * r; + CloudCacheEntry2 * cacheEntry; + CloudNode * fv, * fnv, * gv, * gnv, * t, * e; + CloudVar var; + + assert( f <= g ); + + // terminal cases + F = Cloud_Regular(f); + G = Cloud_Regular(g); + if ( F == G ) + { + if ( f == g ) + return f; + else + return dd->zero; + } + if ( F == dd->one ) + { + if ( f == dd->one ) + return g; + else + return f; + } + + // check cache + cacheEntry = dd->tCaches[CLOUD_OPER_AND] + cloudHashCudd2(f, g, dd->shiftCache[CLOUD_OPER_AND]); +// cacheEntry = dd->tCaches[CLOUD_OPER_AND] + cloudHashBuddy2(f, g, dd->shiftCache[CLOUD_OPER_AND]); + r = cloudCacheLookup2( cacheEntry, dd->nSignCur, f, g ); + if ( r != CLOUD_VOID ) + { + dd->nCacheHits++; + return r; + } + dd->nCacheMisses++; + + + // compute cofactors + if ( cloudV(F) <= cloudV(G) ) + { + var = cloudV(F); + if ( Cloud_IsComplement(f) ) + { + fnv = Cloud_Not(cloudE(F)); + fv = Cloud_Not(cloudT(F)); + } + else + { + fnv = cloudE(F); + fv = cloudT(F); + } + } + else + { + var = cloudV(G); + fv = fnv = f; + } + + if ( cloudV(G) <= cloudV(F) ) + { + if ( Cloud_IsComplement(g) ) + { + gnv = Cloud_Not(cloudE(G)); + gv = Cloud_Not(cloudT(G)); + } + else + { + gnv = cloudE(G); + gv = cloudT(G); + } + } + else + { + gv = gnv = g; + } + + if ( fv <= gv ) + t = cloudBddAnd( dd, fv, gv ); + else + t = cloudBddAnd( dd, gv, fv ); + + if ( t == CLOUD_VOID ) + return CLOUD_VOID; + + if ( fnv <= gnv ) + e = cloudBddAnd( dd, fnv, gnv ); + else + e = cloudBddAnd( dd, gnv, fnv ); + + if ( e == CLOUD_VOID ) + return CLOUD_VOID; + + if ( t == e ) + r = t; + else + { + if ( Cloud_IsComplement(t) ) + { + r = cloudMakeNode( dd, var, Cloud_Not(t), Cloud_Not(e) ); + if ( r == CLOUD_VOID ) + return CLOUD_VOID; + r = Cloud_Not(r); + } + else + { + r = cloudMakeNode( dd, var, t, e ); + if ( r == CLOUD_VOID ) + return CLOUD_VOID; + } + } + cloudCacheInsert2( cacheEntry, dd->nSignCur, f, g, r ); + return r; +} + +/**Function******************************************************************** + + Synopsis [Performs the AND or two BDDs] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +static inline CloudNode * cloudBddAnd_gate( CloudManager * dd, CloudNode * f, CloudNode * g ) +{ + if ( f <= g ) + return cloudBddAnd(dd,f,g); + else + return cloudBddAnd(dd,g,f); +} + +/**Function******************************************************************** + + Synopsis [Performs the AND or two BDDs] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Cloud_bddAnd( CloudManager * dd, CloudNode * f, CloudNode * g ) +{ + if ( Cloud_Regular(f) == CLOUD_VOID || Cloud_Regular(g) == CLOUD_VOID ) + return CLOUD_VOID; + CLOUD_ASSERT(f); + CLOUD_ASSERT(g); + if ( dd->tCaches[CLOUD_OPER_AND] == NULL ) + cloudCacheAllocate( dd, CLOUD_OPER_AND ); + return cloudBddAnd_gate( dd, f, g ); +} + +/**Function******************************************************************** + + Synopsis [Performs the OR or two BDDs] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Cloud_bddOr( CloudManager * dd, CloudNode * f, CloudNode * g ) +{ + CloudNode * res; + if ( Cloud_Regular(f) == CLOUD_VOID || Cloud_Regular(g) == CLOUD_VOID ) + return CLOUD_VOID; + CLOUD_ASSERT(f); + CLOUD_ASSERT(g); + if ( dd->tCaches[CLOUD_OPER_AND] == NULL ) + cloudCacheAllocate( dd, CLOUD_OPER_AND ); + res = cloudBddAnd_gate( dd, Cloud_Not(f), Cloud_Not(g) ); + res = Cloud_NotCond( res, res != CLOUD_VOID ); + return res; +} + +/**Function******************************************************************** + + Synopsis [Performs the XOR or two BDDs] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Cloud_bddXor( CloudManager * dd, CloudNode * f, CloudNode * g ) +{ + CloudNode * t0, * t1, * r; + if ( Cloud_Regular(f) == CLOUD_VOID || Cloud_Regular(g) == CLOUD_VOID ) + return CLOUD_VOID; + CLOUD_ASSERT(f); + CLOUD_ASSERT(g); + if ( dd->tCaches[CLOUD_OPER_AND] == NULL ) + cloudCacheAllocate( dd, CLOUD_OPER_AND ); + t0 = cloudBddAnd_gate( dd, f, Cloud_Not(g) ); + if ( t0 == CLOUD_VOID ) + return CLOUD_VOID; + t1 = cloudBddAnd_gate( dd, Cloud_Not(f), g ); + if ( t1 == CLOUD_VOID ) + return CLOUD_VOID; + r = Cloud_bddOr( dd, t0, t1 ); + return r; +} + + + +/**Function******************************************************************** + + Synopsis [Performs a DFS from f, clearing the LSB of the next + pointers.] + + Description [] + + SideEffects [None] + + SeeAlso [cloudSupport cloudDagSize] + +******************************************************************************/ +static void cloudClearMark( CloudManager * dd, CloudNode * n ) +{ + if ( !cloudNodeIsMarked(n) ) + return; + // clear visited flag + cloudNodeUnmark(n); + if ( cloudIsConstant(n) ) + return; + cloudClearMark( dd, cloudT(n) ); + cloudClearMark( dd, Cloud_Regular(cloudE(n)) ); +} + +/**Function******************************************************************** + + Synopsis [Performs the recursive step of Cloud_Support.] + + Description [Performs the recursive step of Cloud_Support. Performs a + DFS from f. The support is accumulated in supp as a side effect. Uses + the LSB of the then pointer as visited flag.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +static void cloudSupport( CloudManager * dd, CloudNode * n, int * support ) +{ + if ( cloudIsConstant(n) || cloudNodeIsMarked(n) ) + return; + // set visited flag + cloudNodeMark(n); + support[cloudV(n)] = 1; + cloudSupport( dd, cloudT(n), support ); + cloudSupport( dd, Cloud_Regular(cloudE(n)), support ); +} + +/**Function******************************************************************** + + Synopsis [Finds the variables on which a DD depends.] + + Description [Finds the variables on which a DD depends. + Returns a BDD consisting of the product of the variables if + successful; NULL otherwise.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Cloud_Support( CloudManager * dd, CloudNode * n ) +{ + CloudNode * res; + int * support, i; + + CLOUD_ASSERT(n); + + // allocate and initialize support array for cloudSupport + support = CALLOC( int, dd->nVars ); + + // compute support and clean up markers + cloudSupport( dd, Cloud_Regular(n), support ); + cloudClearMark( dd, Cloud_Regular(n) ); + + // transform support from array to cube + res = dd->one; + for ( i = dd->nVars - 1; i >= 0; i-- ) // for each level bottom-up + if ( support[i] == 1 ) + { + res = Cloud_bddAnd( dd, res, dd->vars[i] ); + if ( res == CLOUD_VOID ) + break; + } + FREE( support ); + return res; +} + +/**Function******************************************************************** + + Synopsis [Counts the variables on which a DD depends.] + + Description [Counts the variables on which a DD depends. + Returns the number of the variables if successful; Cloud_OUT_OF_MEM + otherwise.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +int Cloud_SupportSize( CloudManager * dd, CloudNode * n ) +{ + int * support, i, count; + + CLOUD_ASSERT(n); + + // allocate and initialize support array for cloudSupport + support = CALLOC( int, dd->nVars ); + + // compute support and clean up markers + cloudSupport( dd, Cloud_Regular(n), support ); + cloudClearMark( dd, Cloud_Regular(n) ); + + // count support variables + count = 0; + for ( i = 0; i < dd->nVars; i++ ) + { + if ( support[i] == 1 ) + count++; + } + + FREE( support ); + return count; +} + + +/**Function******************************************************************** + + Synopsis [Performs the recursive step of Cloud_DagSize.] + + Description [Performs the recursive step of Cloud_DagSize. Returns the + number of nodes in the graph rooted at n.] + + SideEffects [None] + +******************************************************************************/ +static int cloudDagSize( CloudManager * dd, CloudNode * n ) +{ + int tval, eval; + if ( cloudNodeIsMarked(n) ) + return 0; + // set visited flag + cloudNodeMark(n); + if ( cloudIsConstant(n) ) + return 1; + tval = cloudDagSize( dd, cloudT(n) ); + eval = cloudDagSize( dd, Cloud_Regular(cloudE(n)) ); + return tval + eval + 1; + +} + +/**Function******************************************************************** + + Synopsis [Counts the number of nodes in a DD.] + + Description [Counts the number of nodes in a DD. Returns the number + of nodes in the graph rooted at node.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +int Cloud_DagSize( CloudManager * dd, CloudNode * n ) +{ + int res; + res = cloudDagSize( dd, Cloud_Regular( n ) ); + cloudClearMark( dd, Cloud_Regular( n ) ); + return res; + +} + + +/**Function******************************************************************** + + Synopsis [Performs the recursive step of Cloud_DagSize.] + + Description [Performs the recursive step of Cloud_DagSize. Returns the + number of nodes in the graph rooted at n.] + + SideEffects [None] + +******************************************************************************/ +static int Cloud_DagCollect_rec( CloudManager * dd, CloudNode * n, int * pCounter ) +{ + int tval, eval; + if ( cloudNodeIsMarked(n) ) + return 0; + // set visited flag + cloudNodeMark(n); + if ( cloudIsConstant(n) ) + { + dd->ppNodes[(*pCounter)++] = n; + return 1; + } + tval = Cloud_DagCollect_rec( dd, cloudT(n), pCounter ); + eval = Cloud_DagCollect_rec( dd, Cloud_Regular(cloudE(n)), pCounter ); + dd->ppNodes[(*pCounter)++] = n; + return tval + eval + 1; + +} + +/**Function******************************************************************** + + Synopsis [Counts the number of nodes in a DD.] + + Description [Counts the number of nodes in a DD. Returns the number + of nodes in the graph rooted at node.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +int Cloud_DagCollect( CloudManager * dd, CloudNode * n ) +{ + int res, Counter = 0; + if ( dd->ppNodes == NULL ) + dd->ppNodes = ALLOC( CloudNode *, dd->nNodesLimit ); + res = Cloud_DagCollect_rec( dd, Cloud_Regular( n ), &Counter ); + cloudClearMark( dd, Cloud_Regular( n ) ); + assert( res == Counter ); + return res; + +} + +/**Function******************************************************************** + + Synopsis [Counts the number of nodes in an array of DDs.] + + Description [Counts the number of nodes in a DD. Returns the number + of nodes in the graph rooted at node.] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +int Cloud_SharingSize( CloudManager * dd, CloudNode ** pn, int nn ) +{ + int res, i; + res = 0; + for ( i = 0; i < nn; i++ ) + res += cloudDagSize( dd, Cloud_Regular( pn[i] ) ); + for ( i = 0; i < nn; i++ ) + cloudClearMark( dd, Cloud_Regular( pn[i] ) ); + return res; +} + + +/**Function******************************************************************** + + Synopsis [Returns one cube contained in the given BDD.] + + Description [] + + SideEffects [] + +******************************************************************************/ +CloudNode * Cloud_GetOneCube( CloudManager * dd, CloudNode * bFunc ) +{ + CloudNode * bFunc0, * bFunc1, * res; + + if ( Cloud_IsConstant(bFunc) ) + return bFunc; + + // cofactor + if ( Cloud_IsComplement(bFunc) ) + { + bFunc0 = Cloud_Not( cloudE(bFunc) ); + bFunc1 = Cloud_Not( cloudT(bFunc) ); + } + else + { + bFunc0 = cloudE(bFunc); + bFunc1 = cloudT(bFunc); + } + + // try to find the cube with the negative literal + res = Cloud_GetOneCube( dd, bFunc0 ); + if ( res == CLOUD_VOID ) + return CLOUD_VOID; + + if ( res != dd->zero ) + { + res = Cloud_bddAnd( dd, res, Cloud_Not(dd->vars[Cloud_V(bFunc)]) ); + } + else + { + // try to find the cube with the positive literal + res = Cloud_GetOneCube( dd, bFunc1 ); + if ( res == CLOUD_VOID ) + return CLOUD_VOID; + assert( res != dd->zero ); + res = Cloud_bddAnd( dd, res, dd->vars[Cloud_V(bFunc)] ); + } + return res; +} + +/**Function******************************************************************** + + Synopsis [Prints the BDD as a set of disjoint cubes to the standard output.] + + Description [] + + SideEffects [] + +******************************************************************************/ +void Cloud_bddPrint( CloudManager * dd, CloudNode * Func ) +{ + CloudNode * Cube; + int fFirst = 1; + + if ( Func == dd->zero ) + printf( "Constant 0." ); + else if ( Func == dd->one ) + printf( "Constant 1." ); + else + { + while ( 1 ) + { + Cube = Cloud_GetOneCube( dd, Func ); + if ( Cube == CLOUD_VOID || Cube == dd->zero ) + break; + if ( fFirst ) fFirst = 0; + else printf( " + " ); + Cloud_bddPrintCube( dd, Cube ); + Func = Cloud_bddAnd( dd, Func, Cloud_Not(Cube) ); + } + } + printf( "\n" ); +} + +/**Function******************************************************************** + + Synopsis [Prints one cube.] + + Description [] + + SideEffects [] + +******************************************************************************/ +void Cloud_bddPrintCube( CloudManager * dd, CloudNode * bCube ) +{ + CloudNode * bCube0, * bCube1; + + assert( !Cloud_IsConstant(bCube) ); + while ( 1 ) + { + // get the node structure + if ( Cloud_IsConstant(bCube) ) + break; + + // cofactor the cube + if ( Cloud_IsComplement(bCube) ) + { + bCube0 = Cloud_Not( cloudE(bCube) ); + bCube1 = Cloud_Not( cloudT(bCube) ); + } + else + { + bCube0 = cloudE(bCube); + bCube1 = cloudT(bCube); + } + + if ( bCube0 != dd->zero ) + { + assert( bCube1 == dd->zero ); + printf( "[%d]'", cloudV(bCube) ); + bCube = bCube0; + } + else + { + assert( bCube1 != dd->zero ); + printf( "[%d]", cloudV(bCube) ); + bCube = bCube1; + } + } +} + + +/**Function******************************************************************** + + Synopsis [Prints info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Cloud_PrintInfo( CloudManager * dd ) +{ + if ( dd == NULL ) return; + printf( "The number of unique table nodes allocated = %12d.\n", dd->nNodesAlloc ); + printf( "The number of unique table nodes present = %12d.\n", dd->nNodesCur ); + printf( "The number of unique table hits = %12d.\n", dd->nUniqueHits ); + printf( "The number of unique table misses = %12d.\n", dd->nUniqueMisses ); + printf( "The number of unique table steps = %12d.\n", dd->nUniqueSteps ); + printf( "The number of cache hits = %12d.\n", dd->nCacheHits ); + printf( "The number of cache misses = %12d.\n", dd->nCacheMisses ); + printf( "The current signature = %12d.\n", dd->nSignCur ); + printf( "The total memory in use = %12d.\n", dd->nMemUsed ); +} + +/**Function******************************************************************** + + Synopsis [Prints the state of the hash table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Cloud_PrintHashTable( CloudManager * dd ) +{ + int i; + + for ( i = 0; i < dd->nNodesAlloc; i++ ) + if ( dd->tUnique[i].v == CLOUD_CONST_INDEX ) + printf( "-" ); + else + printf( "+" ); + printf( "\n" ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/kit/cloud.h b/src/aig/kit/cloud.h new file mode 100644 index 00000000..ac9d45f4 --- /dev/null +++ b/src/aig/kit/cloud.h @@ -0,0 +1,269 @@ +/**CFile**************************************************************** + + FileName [cloud.h] + + PackageName [Fast application-specific BDD package.] + + Synopsis [Interface of the package.] + + Author [Alan Mishchenko <alanmi@ece.pdx.edu>] + + Affiliation [ECE Department. Portland State University, Portland, Oregon.] + + Date [Ver. 1.0. Started - June 10, 2002.] + + Revision [$Id: cloud.h,v 1.0 2002/06/10 03:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __CLOUD_H__ +#define __CLOUD_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <assert.h> +#include <time.h> + +#ifdef _WIN32 +#define inline __inline // compatible with MS VS 6.0 +#endif + +//////////////////////////////////////////////////////////////////////// +// n | 2^n || n | 2^n || n | 2^n || n | 2^n // +//====================================================================// +// 1 | 2 || 9 | 512 || 17 | 131,072 || 25 | 33,554,432 // +// 2 | 4 || 10 | 1,024 || 18 | 262,144 || 26 | 67,108,864 // +// 3 | 8 || 11 | 2,048 || 19 | 524,288 || 27 | 134,217,728 // +// 4 | 16 || 12 | 4,096 || 20 | 1,048,576 || 28 | 268,435,456 // +// 5 | 32 || 13 | 8,192 || 21 | 2,097,152 || 29 | 536,870,912 // +// 6 | 64 || 14 | 16,384 || 22 | 4,194,304 || 30 | 1,073,741,824 // +// 7 | 128 || 15 | 32,768 || 23 | 8,388,608 || 31 | 2,147,483,648 // +// 8 | 256 || 16 | 65,536 || 24 | 16,777,216 || 32 | 4,294,967,296 // +//////////////////////////////////////////////////////////////////////// + +// data structure typedefs +typedef struct cloudManager CloudManager; +typedef unsigned CloudVar; +typedef unsigned CloudSign; +typedef struct cloudNode CloudNode; +typedef struct cloudCacheEntry1 CloudCacheEntry1; +typedef struct cloudCacheEntry2 CloudCacheEntry2; +typedef struct cloudCacheEntry3 CloudCacheEntry3; + +// operation codes used to set up the cache +typedef enum { + CLOUD_OPER_AND, + CLOUD_OPER_XOR, + CLOUD_OPER_BDIFF, + CLOUD_OPER_LEQ +} CloudOper; + +/* +// the number of operators using cache +static int CacheOperNum = 4; + +// the ratio of cache size to the unique table size for each operator +static int CacheLogRatioDefault[4] = { + 4, // CLOUD_OPER_AND, + 8, // CLOUD_OPER_XOR, + 8, // CLOUD_OPER_BDIFF, + 8 // CLOUD_OPER_LEQ +}; + +// the ratio of cache size to the unique table size for each operator +static int CacheSize[4] = { + 2, // CLOUD_OPER_AND, + 2, // CLOUD_OPER_XOR, + 2, // CLOUD_OPER_BDIFF, + 2 // CLOUD_OPER_LEQ +}; +*/ + +// data structure definitions +struct cloudManager // the fast bdd manager +{ + // variables + int nVars; // the number of variables allocated + // bits + int bitsNode; // the number of bits used for the node + int bitsCache[4]; // default: bitsNode - CacheSizeRatio[i] + // shifts + int shiftUnique; // 8*sizeof(unsigned) - (bitsNode + 1) + int shiftCache[4]; // 8*sizeof(unsigned) - bitsCache[i] + // nodes + int nNodesAlloc; // 2 ^ (bitsNode + 1) + int nNodesLimit; // 2 ^ bitsNode + int nNodesCur; // the current number of nodes (including const1 and vars) + // signature + CloudSign nSignCur; + + // statistics + int nMemUsed; // memory usage in bytes + // cache stats + int nUniqueHits; // hits in the unique table + int nUniqueMisses; // misses in the unique table + int nCacheHits; // hits in the caches + int nCacheMisses; // misses in the caches + // the number of steps through the hash table + int nUniqueSteps; + + // tables + CloudNode * tUnique; // the unique table to store BDD nodes + + // special nodes + CloudNode * pNodeStart; // the pointer to the first node + CloudNode * pNodeEnd; // the pointer to the first node out of the table + + // constants and variables + CloudNode * one; // the one function + CloudNode * zero; // the zero function + CloudNode ** vars; // the elementary variables + + // temporary storage for nodes + CloudNode ** ppNodes; + + // caches + CloudCacheEntry2 * tCaches[20]; // caches +}; + +struct cloudNode // representation of the node in the unique table +{ + CloudSign s; // signature + CloudVar v; // variable + CloudNode * e; // negative cofactor + CloudNode * t; // positive cofactor +}; +struct cloudCacheEntry1 // one-argument cache +{ + CloudSign s; // signature + CloudNode * a; // argument 1 + CloudNode * r; // result +}; +struct cloudCacheEntry2 // the two-argument cache +{ + CloudSign s; // signature + CloudNode * a; + CloudNode * b; + CloudNode * r; +}; +struct cloudCacheEntry3 // the three-argument cache +{ + CloudSign s; // signature + CloudNode * a; + CloudNode * b; + CloudNode * c; + CloudNode * r; +}; + + +// parameters +#define CLOUD_NODE_BITS 23 +#define CLOUD_ONE ((unsigned)0x00000001) +#define CLOUD_NOT_ONE ((unsigned)0xfffffffe) +#define CLOUD_VOID ((unsigned)0x00000000) + +#define CLOUD_CONST_INDEX ((unsigned)0x0fffffff) +#define CLOUD_MARK_ON ((unsigned)0x10000000) +#define CLOUD_MARK_OFF ((unsigned)0xefffffff) + +// hash functions a la Buddy +#define cloudHashBuddy2(x,y,s) ((((x)+(y))*((x)+(y)+1)/2) & ((1<<(32-(s)))-1)) +#define cloudHashBuddy3(x,y,z,s) (cloudHashBuddy2((cloudHashBuddy2((x),(y),(s))),(z),(s)) & ((1<<(32-(s)))-1)) +// hash functions a la Cudd +#define DD_P1 12582917 +#define DD_P2 4256249 +#define DD_P3 741457 +#define DD_P4 1618033999 +#define cloudHashCudd2(f,g,s) ((((unsigned)(f) * DD_P1 + (unsigned)(g)) * DD_P2) >> (s)) +#define cloudHashCudd3(f,g,h,s) (((((unsigned)(f) * DD_P1 + (unsigned)(g)) * DD_P2 + (unsigned)(h)) * DD_P3) >> (s)) + +// node complementation (using node) +#define Cloud_Regular(p) ((CloudNode*)(((unsigned)(p)) & CLOUD_NOT_ONE)) // get the regular node (w/o bubble) +#define Cloud_Not(p) ((CloudNode*)(((unsigned)(p)) ^ CLOUD_ONE)) // complement the node +#define Cloud_NotCond(p,c) (((int)(c))? Cloud_Not(p):(p)) // complement the node conditionally +#define Cloud_IsComplement(p) ((int)(((unsigned)(p)) & CLOUD_ONE)) // check if complemented +// checking constants (using node) +#define Cloud_IsConstant(p) (((Cloud_Regular(p))->v & CLOUD_MARK_OFF) == CLOUD_CONST_INDEX) +#define cloudIsConstant(p) (((p)->v & CLOUD_MARK_OFF) == CLOUD_CONST_INDEX) + +// retrieving values from the node (using node structure) +#define Cloud_V(p) ((Cloud_Regular(p))->v) +#define Cloud_E(p) ((Cloud_Regular(p))->e) +#define Cloud_T(p) ((Cloud_Regular(p))->t) +// retrieving values from the regular node (using node structure) +#define cloudV(p) ((p)->v) +#define cloudE(p) ((p)->e) +#define cloudT(p) ((p)->t) +// marking/unmarking (using node structure) +#define cloudNodeMark(p) ((p)->v |= CLOUD_MARK_ON) +#define cloudNodeUnmark(p) ((p)->v &= CLOUD_MARK_OFF) +#define cloudNodeIsMarked(p) ((int)((p)->v & CLOUD_MARK_ON)) + +// cache lookups and inserts (using node) +#define cloudCacheLookup1(p,sign,f) (((p)->s == (sign) && (p)->a == (f))? ((p)->r): (CLOUD_VOID)) +#define cloudCacheLookup2(p,sign,f,g) (((p)->s == (sign) && (p)->a == (f) && (p)->b == (g))? ((p)->r): (CLOUD_VOID)) +#define cloudCacheLookup3(p,sign,f,g,h) (((p)->s == (sign) && (p)->a == (f) && (p)->b == (g) && (p)->c == (h))? ((p)->r): (CLOUD_VOID)) +// cache inserts +#define cloudCacheInsert1(p,sign,f,r) (((p)->s = (sign)), ((p)->a = (f)), ((p)->r = (r))) +#define cloudCacheInsert2(p,sign,f,g,r) (((p)->s = (sign)), ((p)->a = (f)), ((p)->b = (g)), ((p)->r = (r))) +#define cloudCacheInsert3(p,sign,f,g,h,r) (((p)->s = (sign)), ((p)->a = (f)), ((p)->b = (g)), ((p)->c = (h)), ((p)->r = (r))) + +//#define CLOUD_ASSERT(p) (assert((p) >= (dd->pNodeStart-1) && (p) < dd->pNodeEnd)) +#define CLOUD_ASSERT(p) assert((p) >= dd->tUnique && (p) < dd->tUnique+dd->nNodesAlloc) + +// utility macros +#ifndef ALLOC +#define ALLOC(type, num) ((type *) malloc(sizeof(type) * (num))) +#endif + +#ifndef CALLOC +#define CALLOC(type, num) ((type *) calloc((num), sizeof(type))) +#endif + +#ifndef FREE +#define FREE(obj) ((obj) ? (free((char *) (obj)), (obj) = 0) : 0) +#endif + +#ifndef PRT +#define PRT(a,t) fprintf( stdout, "%s = ", (a)); printf( "%.2f sec\n", (float)(t)/(float)(CLOCKS_PER_SEC) ) +#endif + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// +// starting/stopping +extern CloudManager * Cloud_Init( int nVars, int nBits ); +extern void Cloud_Quit( CloudManager * dd ); +extern void Cloud_Restart( CloudManager * dd ); +extern void Cloud_CacheAllocate( CloudManager * dd, CloudOper oper, int size ); +extern CloudNode * Cloud_MakeNode( CloudManager * dd, CloudVar v, CloudNode * t, CloudNode * e ); +// support and node count +extern CloudNode * Cloud_Support( CloudManager * dd, CloudNode * n ); +extern int Cloud_SupportSize( CloudManager * dd, CloudNode * n ); +extern int Cloud_DagSize( CloudManager * dd, CloudNode * n ); +extern int Cloud_DagCollect( CloudManager * dd, CloudNode * n ); +extern int Cloud_SharingSize( CloudManager * dd, CloudNode * * pn, int nn ); +// cubes +extern CloudNode * Cloud_GetOneCube( CloudManager * dd, CloudNode * n ); +extern void Cloud_bddPrint( CloudManager * dd, CloudNode * Func ); +extern void Cloud_bddPrintCube( CloudManager * dd, CloudNode * Cube ); +// operations +extern CloudNode * Cloud_bddAnd( CloudManager * dd, CloudNode * f, CloudNode * g ); +extern CloudNode * Cloud_bddOr( CloudManager * dd, CloudNode * f, CloudNode * g ); +// stats +extern void Cloud_PrintInfo( CloudManager * dd ); +extern void Cloud_PrintHashTable( CloudManager * dd ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// diff --git a/src/aig/kit/kit.h b/src/aig/kit/kit.h new file mode 100644 index 00000000..06a93cf0 --- /dev/null +++ b/src/aig/kit/kit.h @@ -0,0 +1,594 @@ +/**CFile**************************************************************** + + FileName [kit.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kit.h,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __KIT_H__ +#define __KIT_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <time.h> +#include "vec.h" +#include "extra.h" +#include "cloud.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Kit_Sop_t_ Kit_Sop_t; +struct Kit_Sop_t_ +{ + int nCubes; // the number of cubes + unsigned * pCubes; // the storage for cubes +}; + +typedef struct Kit_Edge_t_ Kit_Edge_t; +struct Kit_Edge_t_ +{ + unsigned fCompl : 1; // the complemented bit + unsigned Node : 30; // the decomposition node pointed by the edge +}; + +typedef struct Kit_Node_t_ Kit_Node_t; +struct Kit_Node_t_ +{ + Kit_Edge_t eEdge0; // the left child of the node + Kit_Edge_t eEdge1; // the right child of the node + // other info + void * pFunc; // the function of the node (BDD or AIG) + unsigned Level : 14; // the level of this node in the global AIG + // printing info + unsigned fNodeOr : 1; // marks the original OR node + unsigned fCompl0 : 1; // marks the original complemented edge + unsigned fCompl1 : 1; // marks the original complemented edge + // latch info + unsigned nLat0 : 5; // the number of latches on the first edge + unsigned nLat1 : 5; // the number of latches on the second edge + unsigned nLat2 : 5; // the number of latches on the output edge +}; + +typedef struct Kit_Graph_t_ Kit_Graph_t; +struct Kit_Graph_t_ +{ + int fConst; // marks the constant 1 graph + int nLeaves; // the number of leaves + int nSize; // the number of nodes (including the leaves) + int nCap; // the number of allocated nodes + Kit_Node_t * pNodes; // the array of leaves and internal nodes + Kit_Edge_t eRoot; // the pointer to the topmost node +}; + + +// DSD node types +typedef enum { + KIT_DSD_NONE = 0, // 0: unknown + KIT_DSD_CONST1, // 1: constant 1 + KIT_DSD_VAR, // 2: elementary variable + KIT_DSD_AND, // 3: multi-input AND + KIT_DSD_XOR, // 4: multi-input XOR + KIT_DSD_PRIME // 5: arbitrary function of 3+ variables +} Kit_Dsd_t; + +// DSD node +typedef struct Kit_DsdObj_t_ Kit_DsdObj_t; +struct Kit_DsdObj_t_ +{ + unsigned Id : 6; // the number of this node + unsigned Type : 3; // none, const, var, AND, XOR, MUX, PRIME + unsigned fMark : 1; // finished checking output + unsigned Offset : 8; // offset to the truth table + unsigned nRefs : 8; // offset to the truth table + unsigned nFans : 6; // the number of fanins of this node + unsigned char pFans[0]; // the fanin literals +}; + +// DSD network +typedef struct Kit_DsdNtk_t_ Kit_DsdNtk_t; +struct Kit_DsdNtk_t_ +{ + unsigned char nVars; // at most 16 (perhaps 18?) + unsigned char nNodesAlloc; // the number of allocated nodes (at most nVars) + unsigned char nNodes; // the number of nodes + unsigned char Root; // the root of the tree + unsigned * pMem; // memory for the truth tables (memory manager?) + unsigned * pSupps; // supports of the nodes + Kit_DsdObj_t** pNodes; // the nodes +}; + +// DSD manager +typedef struct Kit_DsdMan_t_ Kit_DsdMan_t; +struct Kit_DsdMan_t_ +{ + int nVars; // the maximum number of variables + int nWords; // the number of words in TTs + Vec_Ptr_t * vTtElems; // elementary truth tables + Vec_Ptr_t * vTtNodes; // the node truth tables + // BDD representation + CloudManager * dd; // BDD package + Vec_Ptr_t * vTtBdds; // the node truth tables + Vec_Int_t * vNodes; // temporary array for BDD nodes +}; + +static inline int Kit_DsdVar2Lit( int Var, int fCompl ) { return Var + Var + fCompl; } +static inline int Kit_DsdLit2Var( int Lit ) { return Lit >> 1; } +static inline int Kit_DsdLitIsCompl( int Lit ) { return Lit & 1; } +static inline int Kit_DsdLitNot( int Lit ) { return Lit ^ 1; } +static inline int Kit_DsdLitNotCond( int Lit, int c ) { return Lit ^ (int)(c > 0); } +static inline int Kit_DsdLitRegular( int Lit ) { return Lit & 0xfe; } + +static inline unsigned Kit_DsdObjOffset( int nFans ) { return (nFans >> 2) + ((nFans & 3) > 0); } +static inline unsigned * Kit_DsdObjTruth( Kit_DsdObj_t * pObj ) { return pObj->Type == KIT_DSD_PRIME ? (unsigned *)pObj->pFans + pObj->Offset: NULL; } +static inline int Kit_DsdNtkObjNum( Kit_DsdNtk_t * pNtk ){ return pNtk->nVars + pNtk->nNodes; } +static inline Kit_DsdObj_t * Kit_DsdNtkObj( Kit_DsdNtk_t * pNtk, int Id ) { assert( Id >= 0 && Id < pNtk->nVars + pNtk->nNodes ); return Id < pNtk->nVars ? NULL : pNtk->pNodes[Id - pNtk->nVars]; } +static inline Kit_DsdObj_t * Kit_DsdNtkRoot( Kit_DsdNtk_t * pNtk ) { return Kit_DsdNtkObj( pNtk, Kit_DsdLit2Var(pNtk->Root) ); } +static inline int Kit_DsdLitIsLeaf( Kit_DsdNtk_t * pNtk, int Lit ) { int Id = Kit_DsdLit2Var(Lit); assert( Id >= 0 && Id < pNtk->nVars + pNtk->nNodes ); return Id < pNtk->nVars; } +static inline unsigned Kit_DsdLitSupport( Kit_DsdNtk_t * pNtk, int Lit ) { int Id = Kit_DsdLit2Var(Lit); assert( Id >= 0 && Id < pNtk->nVars + pNtk->nNodes ); return pNtk->pSupps? (Id < pNtk->nVars? (1 << Id) : pNtk->pSupps[Id - pNtk->nVars]) : 0; } + +#define Kit_DsdNtkForEachObj( pNtk, pObj, i ) \ + for ( i = 0; (i < (pNtk)->nNodes) && ((pObj) = (pNtk)->pNodes[i]); i++ ) +#define Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) \ + for ( i = 0; (i < (pObj)->nFans) && ((iLit) = (pObj)->pFans[i], 1); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +#define KIT_MIN(a,b) (((a) < (b))? (a) : (b)) +#define KIT_MAX(a,b) (((a) > (b))? (a) : (b)) +#define KIT_INFINITY (100000000) + +#ifndef ALLOC +#define ALLOC(type, num) ((type *) malloc(sizeof(type) * (num))) +#endif + +#ifndef FREE +#define FREE(obj) ((obj) ? (free((char *) (obj)), (obj) = 0) : 0) +#endif + +#ifndef REALLOC +#define REALLOC(type, obj, num) \ + ((obj) ? ((type *) realloc((char *)(obj), sizeof(type) * (num))) : \ + ((type *) malloc(sizeof(type) * (num)))) +#endif + +static inline int Kit_CubeHasLit( unsigned uCube, int i ) { return(uCube & (unsigned)(1<<i)) > 0; } +static inline unsigned Kit_CubeSetLit( unsigned uCube, int i ) { return uCube | (unsigned)(1<<i); } +static inline unsigned Kit_CubeXorLit( unsigned uCube, int i ) { return uCube ^ (unsigned)(1<<i); } +static inline unsigned Kit_CubeRemLit( unsigned uCube, int i ) { return uCube & ~(unsigned)(1<<i); } + +static inline int Kit_CubeContains( unsigned uLarge, unsigned uSmall ) { return (uLarge & uSmall) == uSmall; } +static inline unsigned Kit_CubeSharp( unsigned uCube, unsigned uMask ) { return uCube & ~uMask; } +static inline unsigned Kit_CubeMask( int nVar ) { return (~(unsigned)0) >> (32-nVar); } + +static inline int Kit_CubeIsMarked( unsigned uCube ) { return Kit_CubeHasLit( uCube, 31 ); } +static inline unsigned Kit_CubeMark( unsigned uCube ) { return Kit_CubeSetLit( uCube, 31 ); } +static inline unsigned Kit_CubeUnmark( unsigned uCube ) { return Kit_CubeRemLit( uCube, 31 ); } + +static inline int Kit_SopCubeNum( Kit_Sop_t * cSop ) { return cSop->nCubes; } +static inline unsigned Kit_SopCube( Kit_Sop_t * cSop, int i ) { return cSop->pCubes[i]; } +static inline void Kit_SopShrink( Kit_Sop_t * cSop, int nCubesNew ) { cSop->nCubes = nCubesNew; } +static inline void Kit_SopPushCube( Kit_Sop_t * cSop, unsigned uCube ) { cSop->pCubes[cSop->nCubes++] = uCube; } +static inline void Kit_SopWriteCube( Kit_Sop_t * cSop, unsigned uCube, int i ) { cSop->pCubes[i] = uCube; } + +static inline Kit_Edge_t Kit_EdgeCreate( int Node, int fCompl ) { Kit_Edge_t eEdge = { fCompl, Node }; return eEdge; } +static inline unsigned Kit_EdgeToInt( Kit_Edge_t eEdge ) { return (eEdge.Node << 1) | eEdge.fCompl; } +static inline Kit_Edge_t Kit_IntToEdge( unsigned Edge ) { return Kit_EdgeCreate( Edge >> 1, Edge & 1 ); } +static inline unsigned Kit_EdgeToInt_( Kit_Edge_t eEdge ) { return *(unsigned *)&eEdge; } +static inline Kit_Edge_t Kit_IntToEdge_( unsigned Edge ) { return *(Kit_Edge_t *)&Edge; } + +static inline int Kit_GraphIsConst( Kit_Graph_t * pGraph ) { return pGraph->fConst; } +static inline int Kit_GraphIsConst0( Kit_Graph_t * pGraph ) { return pGraph->fConst && pGraph->eRoot.fCompl; } +static inline int Kit_GraphIsConst1( Kit_Graph_t * pGraph ) { return pGraph->fConst && !pGraph->eRoot.fCompl; } +static inline int Kit_GraphIsComplement( Kit_Graph_t * pGraph ) { return pGraph->eRoot.fCompl; } +static inline int Kit_GraphIsVar( Kit_Graph_t * pGraph ) { return pGraph->eRoot.Node < (unsigned)pGraph->nLeaves; } +static inline void Kit_GraphComplement( Kit_Graph_t * pGraph ) { pGraph->eRoot.fCompl ^= 1; } +static inline void Kit_GraphSetRoot( Kit_Graph_t * pGraph, Kit_Edge_t eRoot ) { pGraph->eRoot = eRoot; } +static inline int Kit_GraphLeaveNum( Kit_Graph_t * pGraph ) { return pGraph->nLeaves; } +static inline int Kit_GraphNodeNum( Kit_Graph_t * pGraph ) { return pGraph->nSize - pGraph->nLeaves; } +static inline Kit_Node_t * Kit_GraphNode( Kit_Graph_t * pGraph, int i ) { return pGraph->pNodes + i; } +static inline Kit_Node_t * Kit_GraphNodeLast( Kit_Graph_t * pGraph ) { return pGraph->pNodes + pGraph->nSize - 1; } +static inline int Kit_GraphNodeInt( Kit_Graph_t * pGraph, Kit_Node_t * pNode ) { return pNode - pGraph->pNodes; } +static inline int Kit_GraphNodeIsVar( Kit_Graph_t * pGraph, Kit_Node_t * pNode ) { return Kit_GraphNodeInt(pGraph,pNode) < pGraph->nLeaves; } +static inline Kit_Node_t * Kit_GraphVar( Kit_Graph_t * pGraph ) { assert( Kit_GraphIsVar( pGraph ) ); return Kit_GraphNode( pGraph, pGraph->eRoot.Node ); } +static inline int Kit_GraphVarInt( Kit_Graph_t * pGraph ) { assert( Kit_GraphIsVar( pGraph ) ); return Kit_GraphNodeInt( pGraph, Kit_GraphVar(pGraph) ); } +static inline Kit_Node_t * Kit_GraphNodeFanin0( Kit_Graph_t * pGraph, Kit_Node_t * pNode ){ return Kit_GraphNodeIsVar(pGraph, pNode)? NULL : Kit_GraphNode(pGraph, pNode->eEdge0.Node); } +static inline Kit_Node_t * Kit_GraphNodeFanin1( Kit_Graph_t * pGraph, Kit_Node_t * pNode ){ return Kit_GraphNodeIsVar(pGraph, pNode)? NULL : Kit_GraphNode(pGraph, pNode->eEdge1.Node); } +static inline int Kit_GraphRootLevel( Kit_Graph_t * pGraph ) { return Kit_GraphNode(pGraph, pGraph->eRoot.Node)->Level; } + +static inline int Kit_Float2Int( float Val ) { return *((int *)&Val); } +static inline float Kit_Int2Float( int Num ) { return *((float *)&Num); } +static inline int Kit_BitWordNum( int nBits ) { return nBits/(8*sizeof(unsigned)) + ((nBits%(8*sizeof(unsigned))) > 0); } +static inline int Kit_TruthWordNum( int nVars ) { return nVars <= 5 ? 1 : (1 << (nVars - 5)); } +static inline unsigned Kit_BitMask( int nBits ) { assert( nBits <= 32 ); return ~((~(unsigned)0) << nBits); } + +static inline void Kit_TruthSetBit( unsigned * p, int Bit ) { p[Bit>>5] |= (1<<(Bit & 31)); } +static inline void Kit_TruthXorBit( unsigned * p, int Bit ) { p[Bit>>5] ^= (1<<(Bit & 31)); } +static inline int Kit_TruthHasBit( unsigned * p, int Bit ) { return (p[Bit>>5] & (1<<(Bit & 31))) > 0; } + +static inline int Kit_WordFindFirstBit( unsigned uWord ) +{ + int i; + for ( i = 0; i < 32; i++ ) + if ( uWord & (1 << i) ) + return i; + return -1; +} +static inline int Kit_WordHasOneBit( unsigned uWord ) +{ + return (uWord & (uWord - 1)) == 0; +} +static inline int Kit_WordCountOnes( unsigned uWord ) +{ + uWord = (uWord & 0x55555555) + ((uWord>>1) & 0x55555555); + uWord = (uWord & 0x33333333) + ((uWord>>2) & 0x33333333); + uWord = (uWord & 0x0F0F0F0F) + ((uWord>>4) & 0x0F0F0F0F); + uWord = (uWord & 0x00FF00FF) + ((uWord>>8) & 0x00FF00FF); + return (uWord & 0x0000FFFF) + (uWord>>16); +} +static inline int Kit_TruthCountOnes( unsigned * pIn, int nVars ) +{ + int w, Counter = 0; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + Counter += Kit_WordCountOnes(pIn[w]); + return Counter; +} +static inline int Kit_TruthFindFirstBit( unsigned * pIn, int nVars ) +{ + int w; + for ( w = 0; w < Kit_TruthWordNum(nVars); w++ ) + if ( pIn[w] ) + return 32*w + Kit_WordFindFirstBit(pIn[w]); + return -1; +} +static inline int Kit_TruthFindFirstZero( unsigned * pIn, int nVars ) +{ + int w; + for ( w = 0; w < Kit_TruthWordNum(nVars); w++ ) + if ( ~pIn[w] ) + return 32*w + Kit_WordFindFirstBit(~pIn[w]); + return -1; +} +static inline int Kit_TruthIsEqual( unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn0[w] != pIn1[w] ) + return 0; + return 1; +} +static inline int Kit_TruthIsOpposite( unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn0[w] != ~pIn1[w] ) + return 0; + return 1; +} +static inline int Kit_TruthIsEqualWithPhase( unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + if ( (pIn0[0] & 1) == (pIn1[0] & 1) ) + { + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn0[w] != pIn1[w] ) + return 0; + } + else + { + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn0[w] != ~pIn1[w] ) + return 0; + } + return 1; +} +static inline int Kit_TruthIsConst0( unsigned * pIn, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn[w] ) + return 0; + return 1; +} +static inline int Kit_TruthIsConst1( unsigned * pIn, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn[w] != ~(unsigned)0 ) + return 0; + return 1; +} +static inline int Kit_TruthIsImply( unsigned * pIn1, unsigned * pIn2, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn1[w] & ~pIn2[w] ) + return 0; + return 1; +} +static inline int Kit_TruthIsDisjoint( unsigned * pIn1, unsigned * pIn2, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn1[w] & pIn2[w] ) + return 0; + return 1; +} +static inline int Kit_TruthIsDisjoint3( unsigned * pIn1, unsigned * pIn2, unsigned * pIn3, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + if ( pIn1[w] & pIn2[w] & pIn3[w] ) + return 0; + return 1; +} +static inline void Kit_TruthCopy( unsigned * pOut, unsigned * pIn, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn[w]; +} +static inline void Kit_TruthClear( unsigned * pOut, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = 0; +} +static inline void Kit_TruthFill( unsigned * pOut, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = ~(unsigned)0; +} +static inline void Kit_TruthNot( unsigned * pOut, unsigned * pIn, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = ~pIn[w]; +} +static inline void Kit_TruthAnd( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn0[w] & pIn1[w]; +} +static inline void Kit_TruthOr( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn0[w] | pIn1[w]; +} +static inline void Kit_TruthXor( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn0[w] ^ pIn1[w]; +} +static inline void Kit_TruthSharp( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn0[w] & ~pIn1[w]; +} +static inline void Kit_TruthNand( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = ~(pIn0[w] & pIn1[w]); +} +static inline void Kit_TruthAndPhase( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, int nVars, int fCompl0, int fCompl1 ) +{ + int w; + if ( fCompl0 && fCompl1 ) + { + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = ~(pIn0[w] | pIn1[w]); + } + else if ( fCompl0 && !fCompl1 ) + { + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = ~pIn0[w] & pIn1[w]; + } + else if ( !fCompl0 && fCompl1 ) + { + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn0[w] & ~pIn1[w]; + } + else // if ( !fCompl0 && !fCompl1 ) + { + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = pIn0[w] & pIn1[w]; + } +} +static inline void Kit_TruthMux( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, unsigned * pCtrl, int nVars ) +{ + int w; + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = (pIn0[w] & ~pCtrl[w]) | (pIn1[w] & pCtrl[w]); +} +static inline void Kit_TruthMuxPhase( unsigned * pOut, unsigned * pIn0, unsigned * pIn1, unsigned * pCtrl, int nVars, int fComp0 ) +{ + int w; + if ( fComp0 ) + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = (~pIn0[w] & ~pCtrl[w]) | (pIn1[w] & pCtrl[w]); + else + for ( w = Kit_TruthWordNum(nVars)-1; w >= 0; w-- ) + pOut[w] = (pIn0[w] & ~pCtrl[w]) | (pIn1[w] & pCtrl[w]); +} +static inline void Kit_TruthIthVar( unsigned * pTruth, int nVars, int iVar ) +{ + unsigned Masks[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 }; + int k, nWords = (nVars <= 5 ? 1 : (1 << (nVars - 5))); + if ( iVar < 5 ) + { + for ( k = 0; k < nWords; k++ ) + pTruth[k] = Masks[iVar]; + } + else + { + for ( k = 0; k < nWords; k++ ) + if ( k & (1 << (iVar-5)) ) + pTruth[k] = ~(unsigned)0; + else + pTruth[k] = 0; + } +} + + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +#define Kit_SopForEachCube( cSop, uCube, i ) \ + for ( i = 0; (i < Kit_SopCubeNum(cSop)) && ((uCube) = Kit_SopCube(cSop, i)); i++ ) +#define Kit_CubeForEachLiteral( uCube, Lit, nLits, i ) \ + for ( i = 0; (i < (nLits)) && ((Lit) = Kit_CubeHasLit(uCube, i)); i++ ) + +#define Kit_GraphForEachLeaf( pGraph, pLeaf, i ) \ + for ( i = 0; (i < (pGraph)->nLeaves) && (((pLeaf) = Kit_GraphNode(pGraph, i)), 1); i++ ) +#define Kit_GraphForEachNode( pGraph, pAnd, i ) \ + for ( i = (pGraph)->nLeaves; (i < (pGraph)->nSize) && (((pAnd) = Kit_GraphNode(pGraph, i)), 1); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== kitBdd.c ==========================================================*/ +extern DdNode * Kit_SopToBdd( DdManager * dd, Kit_Sop_t * cSop, int nVars ); +extern DdNode * Kit_GraphToBdd( DdManager * dd, Kit_Graph_t * pGraph ); +extern DdNode * Kit_TruthToBdd( DdManager * dd, unsigned * pTruth, int nVars, int fMSBonTop ); +/*=== kitCloud.c ==========================================================*/ +extern CloudNode * Kit_TruthToCloud( CloudManager * dd, unsigned * pTruth, int nVars ); +extern unsigned * Kit_CloudToTruth( Vec_Int_t * vNodes, int nVars, Vec_Ptr_t * vStore, int fInv ); +extern int Kit_CreateCloud( CloudManager * dd, CloudNode * pFunc, Vec_Int_t * vNodes ); +extern int Kit_CreateCloudFromTruth( CloudManager * dd, unsigned * pTruth, int nVars, Vec_Int_t * vNodes ); +extern unsigned * Kit_TruthCompose( CloudManager * dd, unsigned * pTruth, int nVars, unsigned ** pInputs, int nVarsAll, Vec_Ptr_t * vStore, Vec_Int_t * vNodes ); +extern void Kit_TruthCofSupports( Vec_Int_t * vBddDir, Vec_Int_t * vBddInv, int nVars, Vec_Int_t * vMemory, unsigned * puSupps ); +/*=== kitDsd.c ==========================================================*/ +extern Kit_DsdMan_t * Kit_DsdManAlloc( int nVars, int nNodes ); +extern void Kit_DsdManFree( Kit_DsdMan_t * p ); +extern Kit_DsdNtk_t * Kit_DsdDeriveNtk( unsigned * pTruth, int nVars, int nLutSize ); +extern unsigned * Kit_DsdTruthCompute( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk ); +extern void Kit_DsdTruth( Kit_DsdNtk_t * pNtk, unsigned * pTruthRes ); +extern void Kit_DsdTruthPartial( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, unsigned * pTruthRes, unsigned uSupp ); +extern void Kit_DsdTruthPartialTwo( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, unsigned uSupp, int iVar, unsigned * pTruthCo, unsigned * pTruthDec ); +extern void Kit_DsdPrint( FILE * pFile, Kit_DsdNtk_t * pNtk ); +extern void Kit_DsdPrintExpanded( Kit_DsdNtk_t * pNtk ); +extern void Kit_DsdPrintFromTruth( unsigned * pTruth, int nVars ); +extern Kit_DsdNtk_t * Kit_DsdDecompose( unsigned * pTruth, int nVars ); +extern Kit_DsdNtk_t * Kit_DsdDecomposeExpand( unsigned * pTruth, int nVars ); +extern Kit_DsdNtk_t * Kit_DsdDecomposeMux( unsigned * pTruth, int nVars, int nDecMux ); +extern void Kit_DsdVerify( Kit_DsdNtk_t * pNtk, unsigned * pTruth, int nVars ); +extern void Kit_DsdNtkFree( Kit_DsdNtk_t * pNtk ); +extern int Kit_DsdNonDsdSizeMax( Kit_DsdNtk_t * pNtk ); +extern unsigned Kit_DsdNonDsdSupports( Kit_DsdNtk_t * pNtk ); +extern unsigned Kit_DsdGetSupports( Kit_DsdNtk_t * p ); +extern Kit_DsdNtk_t * Kit_DsdExpand( Kit_DsdNtk_t * p ); +extern Kit_DsdNtk_t * Kit_DsdShrink( Kit_DsdNtk_t * p, int pPrios[] ); +extern void Kit_DsdRotate( Kit_DsdNtk_t * p, int pFreqs[] ); +extern int Kit_DsdCofactoring( unsigned * pTruth, int nVars, int * pCofVars, int nLimit, int fVerbose ); +/*=== kitFactor.c ==========================================================*/ +extern Kit_Graph_t * Kit_SopFactor( Vec_Int_t * vCover, int fCompl, int nVars, Vec_Int_t * vMemory ); +/*=== kitGraph.c ==========================================================*/ +extern Kit_Graph_t * Kit_GraphCreate( int nLeaves ); +extern Kit_Graph_t * Kit_GraphCreateConst0(); +extern Kit_Graph_t * Kit_GraphCreateConst1(); +extern Kit_Graph_t * Kit_GraphCreateLeaf( int iLeaf, int nLeaves, int fCompl ); +extern void Kit_GraphFree( Kit_Graph_t * pGraph ); +extern Kit_Node_t * Kit_GraphAppendNode( Kit_Graph_t * pGraph ); +extern Kit_Edge_t Kit_GraphAddNodeAnd( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1 ); +extern Kit_Edge_t Kit_GraphAddNodeOr( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1 ); +extern Kit_Edge_t Kit_GraphAddNodeXor( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1, int Type ); +extern Kit_Edge_t Kit_GraphAddNodeMux( Kit_Graph_t * pGraph, Kit_Edge_t eEdgeC, Kit_Edge_t eEdgeT, Kit_Edge_t eEdgeE, int Type ); +extern unsigned Kit_GraphToTruth( Kit_Graph_t * pGraph ); +extern Kit_Graph_t * Kit_TruthToGraph( unsigned * pTruth, int nVars, Vec_Int_t * vMemory ); +extern int Kit_GraphLeafDepth_rec( Kit_Graph_t * pGraph, Kit_Node_t * pNode, Kit_Node_t * pLeaf ); +/*=== kitHop.c ==========================================================*/ +//extern Hop_Obj_t * Kit_GraphToHop( Hop_Man_t * pMan, Kit_Graph_t * pGraph ); +//extern Hop_Obj_t * Kit_TruthToHop( Hop_Man_t * pMan, unsigned * pTruth, int nVars, Vec_Int_t * vMemory ); +//extern Hop_Obj_t * Kit_CoverToHop( Hop_Man_t * pMan, Vec_Int_t * vCover, int nVars, Vec_Int_t * vMemory ); +/*=== kitIsop.c ==========================================================*/ +extern int Kit_TruthIsop( unsigned * puTruth, int nVars, Vec_Int_t * vMemory, int fTryBoth ); +/*=== kitSop.c ==========================================================*/ +extern void Kit_SopCreate( Kit_Sop_t * cResult, Vec_Int_t * vInput, int nVars, Vec_Int_t * vMemory ); +extern void Kit_SopCreateInverse( Kit_Sop_t * cResult, Vec_Int_t * vInput, int nVars, Vec_Int_t * vMemory ); +extern void Kit_SopDup( Kit_Sop_t * cResult, Kit_Sop_t * cSop, Vec_Int_t * vMemory ); +extern void Kit_SopDivideByLiteralQuo( Kit_Sop_t * cSop, int iLit ); +extern void Kit_SopDivideByCube( Kit_Sop_t * cSop, Kit_Sop_t * cDiv, Kit_Sop_t * vQuo, Kit_Sop_t * vRem, Vec_Int_t * vMemory ); +extern void Kit_SopDivideInternal( Kit_Sop_t * cSop, Kit_Sop_t * cDiv, Kit_Sop_t * vQuo, Kit_Sop_t * vRem, Vec_Int_t * vMemory ); +extern void Kit_SopMakeCubeFree( Kit_Sop_t * cSop ); +extern int Kit_SopIsCubeFree( Kit_Sop_t * cSop ); +extern void Kit_SopCommonCubeCover( Kit_Sop_t * cResult, Kit_Sop_t * cSop, Vec_Int_t * vMemory ); +extern int Kit_SopAnyLiteral( Kit_Sop_t * cSop, int nLits ); +extern int Kit_SopDivisor( Kit_Sop_t * cResult, Kit_Sop_t * cSop, int nLits, Vec_Int_t * vMemory ); +extern void Kit_SopBestLiteralCover( Kit_Sop_t * cResult, Kit_Sop_t * cSop, unsigned uCube, int nLits, Vec_Int_t * vMemory ); +/*=== kitTruth.c ==========================================================*/ +extern void Kit_TruthSwapAdjacentVars( unsigned * pOut, unsigned * pIn, int nVars, int Start ); +extern void Kit_TruthStretch( unsigned * pOut, unsigned * pIn, int nVars, int nVarsAll, unsigned Phase, int fReturnIn ); +extern void Kit_TruthShrink( unsigned * pOut, unsigned * pIn, int nVars, int nVarsAll, unsigned Phase, int fReturnIn ); +extern int Kit_TruthVarInSupport( unsigned * pTruth, int nVars, int iVar ); +extern int Kit_TruthSupportSize( unsigned * pTruth, int nVars ); +extern unsigned Kit_TruthSupport( unsigned * pTruth, int nVars ); +extern void Kit_TruthCofactor0( unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthCofactor1( unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthCofactor0New( unsigned * pOut, unsigned * pIn, int nVars, int iVar ); +extern void Kit_TruthCofactor1New( unsigned * pOut, unsigned * pIn, int nVars, int iVar ); +extern void Kit_TruthExist( unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthExistNew( unsigned * pRes, unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthExistSet( unsigned * pRes, unsigned * pTruth, int nVars, unsigned uMask ); +extern void Kit_TruthForall( unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthForallNew( unsigned * pRes, unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthForallSet( unsigned * pRes, unsigned * pTruth, int nVars, unsigned uMask ); +extern void Kit_TruthUniqueNew( unsigned * pRes, unsigned * pTruth, int nVars, int iVar ); +extern void Kit_TruthMuxVar( unsigned * pOut, unsigned * pCof0, unsigned * pCof1, int nVars, int iVar ); +extern void Kit_TruthMuxVarPhase( unsigned * pOut, unsigned * pCof0, unsigned * pCof1, int nVars, int iVar, int fCompl0 ); +extern void Kit_TruthChangePhase( unsigned * pTruth, int nVars, int iVar ); +extern int Kit_TruthMinCofSuppOverlap( unsigned * pTruth, int nVars, int * pVarMin ); +extern int Kit_TruthBestCofVar( unsigned * pTruth, int nVars, unsigned * pCof0, unsigned * pCof1 ); +extern void Kit_TruthCountOnesInCofs( unsigned * pTruth, int nVars, short * pStore ); +extern void Kit_TruthCountOnesInCofsSlow( unsigned * pTruth, int nVars, short * pStore, unsigned * pAux ); +extern unsigned Kit_TruthHash( unsigned * pIn, int nWords ); +extern unsigned Kit_TruthSemiCanonicize( unsigned * pInOut, unsigned * pAux, int nVars, char * pCanonPerm, short * pStore ); +extern char * Kit_TruthDumpToFile( unsigned * pTruth, int nVars, int nFile ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/kit/kitAig.c b/src/aig/kit/kitAig.c new file mode 100644 index 00000000..83012a8c --- /dev/null +++ b/src/aig/kit/kitAig.c @@ -0,0 +1,121 @@ +/**CFile**************************************************************** + + FileName [kitAig.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Procedures involving AIGs.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitAig.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" +#include "aig.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Transforms the decomposition graph into the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Kit_GraphToAigInternal( Aig_Man_t * pMan, Kit_Graph_t * pGraph ) +{ + Kit_Node_t * pNode = NULL; + Aig_Obj_t * pAnd0, * pAnd1; + int i; + // check for constant function + if ( Kit_GraphIsConst(pGraph) ) + return Aig_NotCond( Aig_ManConst1(pMan), Kit_GraphIsComplement(pGraph) ); + // check for a literal + if ( Kit_GraphIsVar(pGraph) ) + return Aig_NotCond( Kit_GraphVar(pGraph)->pFunc, Kit_GraphIsComplement(pGraph) ); + // build the AIG nodes corresponding to the AND gates of the graph + Kit_GraphForEachNode( pGraph, pNode, i ) + { + pAnd0 = Aig_NotCond( Kit_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl ); + pAnd1 = Aig_NotCond( Kit_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl ); + pNode->pFunc = Aig_And( pMan, pAnd0, pAnd1 ); + } + // complement the result if necessary + return Aig_NotCond( pNode->pFunc, Kit_GraphIsComplement(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [Strashes one logic node using its SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Kit_GraphToAig( Aig_Man_t * pMan, Aig_Obj_t ** pFanins, Kit_Graph_t * pGraph ) +{ + Kit_Node_t * pNode = NULL; + int i; + // collect the fanins + Kit_GraphForEachLeaf( pGraph, pNode, i ) + pNode->pFunc = pFanins[i]; + // perform strashing + return Kit_GraphToAigInternal( pMan, pGraph ); +} + +/**Function************************************************************* + + Synopsis [Strashed onen logic nodes using its truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Obj_t * Kit_TruthToAig( Aig_Man_t * pMan, Aig_Obj_t ** pFanins, unsigned * pTruth, int nVars, Vec_Int_t * vMemory ) +{ + Aig_Obj_t * pObj; + Kit_Graph_t * pGraph; + // transform truth table into the decomposition tree + if ( vMemory == NULL ) + { + vMemory = Vec_IntAlloc( 0 ); + pGraph = Kit_TruthToGraph( pTruth, nVars, vMemory ); + Vec_IntFree( vMemory ); + } + else + pGraph = Kit_TruthToGraph( pTruth, nVars, vMemory ); + // derive the AIG for the decomposition tree + pObj = Kit_GraphToAig( pMan, pFanins, pGraph ); + Kit_GraphFree( pGraph ); + return pObj; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitBdd.c b/src/aig/kit/kitBdd.c new file mode 100644 index 00000000..9c8d4f7a --- /dev/null +++ b/src/aig/kit/kitBdd.c @@ -0,0 +1,231 @@ +/**CFile**************************************************************** + + FileName [kitBdd.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Procedures involving BDDs.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitBdd.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" +#include "extra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Derives the BDD for the given SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +DdNode * Kit_SopToBdd( DdManager * dd, Kit_Sop_t * cSop, int nVars ) +{ + DdNode * bSum, * bCube, * bTemp, * bVar; + unsigned uCube; + int Value, i, v; + assert( nVars < 16 ); + // start the cover + bSum = Cudd_ReadLogicZero(dd); Cudd_Ref( bSum ); + // check the logic function of the node + Kit_SopForEachCube( cSop, uCube, i ) + { + bCube = Cudd_ReadOne(dd); Cudd_Ref( bCube ); + for ( v = 0; v < nVars; v++ ) + { + Value = ((uCube >> 2*v) & 3); + if ( Value == 1 ) + bVar = Cudd_Not( Cudd_bddIthVar( dd, v ) ); + else if ( Value == 2 ) + bVar = Cudd_bddIthVar( dd, v ); + else + continue; + bCube = Cudd_bddAnd( dd, bTemp = bCube, bVar ); Cudd_Ref( bCube ); + Cudd_RecursiveDeref( dd, bTemp ); + } + bSum = Cudd_bddOr( dd, bTemp = bSum, bCube ); + Cudd_Ref( bSum ); + Cudd_RecursiveDeref( dd, bTemp ); + Cudd_RecursiveDeref( dd, bCube ); + } + // complement the result if necessary + Cudd_Deref( bSum ); + return bSum; +} + +/**Function************************************************************* + + Synopsis [Converts graph to BDD.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +DdNode * Kit_GraphToBdd( DdManager * dd, Kit_Graph_t * pGraph ) +{ + DdNode * bFunc, * bFunc0, * bFunc1; + Kit_Node_t * pNode; + int i; + + // sanity checks + assert( Kit_GraphLeaveNum(pGraph) >= 0 ); + assert( Kit_GraphLeaveNum(pGraph) <= pGraph->nSize ); + + // check for constant function + if ( Kit_GraphIsConst(pGraph) ) + return Cudd_NotCond( b1, Kit_GraphIsComplement(pGraph) ); + // check for a literal + if ( Kit_GraphIsVar(pGraph) ) + return Cudd_NotCond( Cudd_bddIthVar(dd, Kit_GraphVarInt(pGraph)), Kit_GraphIsComplement(pGraph) ); + + // assign the elementary variables + Kit_GraphForEachLeaf( pGraph, pNode, i ) + pNode->pFunc = Cudd_bddIthVar( dd, i ); + + // compute the function for each internal node + Kit_GraphForEachNode( pGraph, pNode, i ) + { + bFunc0 = Cudd_NotCond( Kit_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl ); + bFunc1 = Cudd_NotCond( Kit_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl ); + pNode->pFunc = Cudd_bddAnd( dd, bFunc0, bFunc1 ); Cudd_Ref( pNode->pFunc ); + } + + // deref the intermediate results + bFunc = pNode->pFunc; Cudd_Ref( bFunc ); + Kit_GraphForEachNode( pGraph, pNode, i ) + Cudd_RecursiveDeref( dd, pNode->pFunc ); + Cudd_Deref( bFunc ); + + // complement the result if necessary + return Cudd_NotCond( bFunc, Kit_GraphIsComplement(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +DdNode * Kit_TruthToBdd_rec( DdManager * dd, unsigned * pTruth, int iBit, int nVars, int nVarsTotal, int fMSBonTop ) +{ + DdNode * bF0, * bF1, * bF; + int Var; + if ( nVars <= 5 ) + { + unsigned uTruth, uMask; + uMask = ((~(unsigned)0) >> (32 - (1<<nVars))); + uTruth = (pTruth[iBit>>5] >> (iBit&31)) & uMask; + if ( uTruth == 0 ) + return b0; + if ( uTruth == uMask ) + return b1; + } + // find the variable to use + Var = fMSBonTop? nVarsTotal-nVars : nVars-1; + // other special cases can be added + bF0 = Kit_TruthToBdd_rec( dd, pTruth, iBit, nVars-1, nVarsTotal, fMSBonTop ); Cudd_Ref( bF0 ); + bF1 = Kit_TruthToBdd_rec( dd, pTruth, iBit+(1<<(nVars-1)), nVars-1, nVarsTotal, fMSBonTop ); Cudd_Ref( bF1 ); + bF = Cudd_bddIte( dd, dd->vars[Var], bF1, bF0 ); Cudd_Ref( bF ); + Cudd_RecursiveDeref( dd, bF0 ); + Cudd_RecursiveDeref( dd, bF1 ); + Cudd_Deref( bF ); + return bF; +} + +/**Function************************************************************* + + Synopsis [Compute BDD corresponding to the truth table.] + + Description [If truth table has N vars, the BDD depends on N topmost + variables of the BDD manager. The most significant variable of the table + is encoded by the topmost variable of the manager. BDD construction is + efficient in this case because BDD is constructed one node at a time, + by simply adding BDD nodes on top of existent BDD nodes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +DdNode * Kit_TruthToBdd( DdManager * dd, unsigned * pTruth, int nVars, int fMSBonTop ) +{ + return Kit_TruthToBdd_rec( dd, pTruth, 0, nVars, nVars, fMSBonTop ); +} + +/**Function************************************************************* + + Synopsis [Verifies that the factoring is correct.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_SopFactorVerify( Vec_Int_t * vCover, Kit_Graph_t * pFForm, int nVars ) +{ + static DdManager * dd = NULL; + Kit_Sop_t Sop, * cSop = &Sop; + DdNode * bFunc1, * bFunc2; + Vec_Int_t * vMemory; + int RetValue; + // get the manager + if ( dd == NULL ) + dd = Cudd_Init( 16, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 ); + // derive SOP + vMemory = Vec_IntAlloc( Vec_IntSize(vCover) ); + Kit_SopCreate( cSop, vCover, nVars, vMemory ); + // get the functions + bFunc1 = Kit_SopToBdd( dd, cSop, nVars ); Cudd_Ref( bFunc1 ); + bFunc2 = Kit_GraphToBdd( dd, pFForm ); Cudd_Ref( bFunc2 ); +//Extra_bddPrint( dd, bFunc1 ); printf("\n"); +//Extra_bddPrint( dd, bFunc2 ); printf("\n"); + RetValue = (bFunc1 == bFunc2); + if ( bFunc1 != bFunc2 ) + { + int s; + Extra_bddPrint( dd, bFunc1 ); printf("\n"); + Extra_bddPrint( dd, bFunc2 ); printf("\n"); + s = 0; + } + Cudd_RecursiveDeref( dd, bFunc1 ); + Cudd_RecursiveDeref( dd, bFunc2 ); + Vec_IntFree( vMemory ); + return RetValue; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitCloud.c b/src/aig/kit/kitCloud.c new file mode 100644 index 00000000..7b160fea --- /dev/null +++ b/src/aig/kit/kitCloud.c @@ -0,0 +1,368 @@ +/**CFile**************************************************************** + + FileName [kitCloud.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Procedures using BDD package CLOUD.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitCloud.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// internal representation of the function to be decomposed +typedef struct Kit_Mux_t_ Kit_Mux_t; +struct Kit_Mux_t_ +{ + unsigned v : 5; // variable + unsigned t : 12; // then edge + unsigned e : 12; // else edge + unsigned c : 1; // complemented attr of else edge + unsigned i : 1; // complemented attr of top node +}; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Derive BDD from the truth table for 5 variable functions.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +CloudNode * Kit_TruthToCloud5_rec( CloudManager * dd, unsigned uTruth, int nVars, int nVarsAll ) +{ + static unsigned uVars[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 }; + CloudNode * pCof0, * pCof1; + unsigned uCof0, uCof1; + assert( nVars <= 5 ); + if ( uTruth == 0 ) + return dd->zero; + if ( uTruth == ~0 ) + return dd->one; + if ( nVars == 1 ) + { + if ( uTruth == uVars[0] ) + return dd->vars[nVarsAll-1]; + if ( uTruth == ~uVars[0] ) + return Cloud_Not(dd->vars[nVarsAll-1]); + assert( 0 ); + } +// Count++; + assert( nVars > 1 ); + uCof0 = uTruth & ~uVars[nVars-1]; + uCof1 = uTruth & uVars[nVars-1]; + uCof0 |= uCof0 << (1<<(nVars-1)); + uCof1 |= uCof1 >> (1<<(nVars-1)); + if ( uCof0 == uCof1 ) + return Kit_TruthToCloud5_rec( dd, uCof0, nVars - 1, nVarsAll ); + if ( uCof0 == ~uCof1 ) + { + pCof0 = Kit_TruthToCloud5_rec( dd, uCof0, nVars - 1, nVarsAll ); + pCof1 = Cloud_Not( pCof0 ); + } + else + { + pCof0 = Kit_TruthToCloud5_rec( dd, uCof0, nVars - 1, nVarsAll ); + pCof1 = Kit_TruthToCloud5_rec( dd, uCof1, nVars - 1, nVarsAll ); + } + return Cloud_MakeNode( dd, nVarsAll - nVars, pCof1, pCof0 ); +} + +/**Function******************************************************************** + + Synopsis [Compute BDD for the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Kit_TruthToCloud_rec( CloudManager * dd, unsigned * pTruth, int nVars, int nVarsAll ) +{ + CloudNode * pCof0, * pCof1; + unsigned * pTruth0, * pTruth1; + if ( nVars <= 5 ) + return Kit_TruthToCloud5_rec( dd, pTruth[0], nVars, nVarsAll ); + if ( Kit_TruthIsConst0(pTruth, nVars) ) + return dd->zero; + if ( Kit_TruthIsConst1(pTruth, nVars) ) + return dd->one; +// Count++; + pTruth0 = pTruth; + pTruth1 = pTruth + Kit_TruthWordNum(nVars-1); + if ( Kit_TruthIsEqual( pTruth0, pTruth1, nVars - 1 ) ) + return Kit_TruthToCloud_rec( dd, pTruth0, nVars - 1, nVarsAll ); + if ( Kit_TruthIsOpposite( pTruth0, pTruth1, nVars - 1 ) ) + { + pCof0 = Kit_TruthToCloud_rec( dd, pTruth0, nVars - 1, nVarsAll ); + pCof1 = Cloud_Not( pCof0 ); + } + else + { + pCof0 = Kit_TruthToCloud_rec( dd, pTruth0, nVars - 1, nVarsAll ); + pCof1 = Kit_TruthToCloud_rec( dd, pTruth1, nVars - 1, nVarsAll ); + } + return Cloud_MakeNode( dd, nVarsAll - nVars, pCof1, pCof0 ); +} + +/**Function******************************************************************** + + Synopsis [Compute BDD for the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +CloudNode * Kit_TruthToCloud( CloudManager * dd, unsigned * pTruth, int nVars ) +{ + CloudNode * pRes; + pRes = Kit_TruthToCloud_rec( dd, pTruth, nVars, nVars ); +// printf( "%d/%d ", Count, Cloud_DagSize(dd, pRes) ); + return pRes; +} + +/**Function******************************************************************** + + Synopsis [Transforms the array of BDDs into the integer array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +int Kit_CreateCloud( CloudManager * dd, CloudNode * pFunc, Vec_Int_t * vNodes ) +{ + Kit_Mux_t Mux; + int nNodes, i; + // collect BDD nodes + nNodes = Cloud_DagCollect( dd, pFunc ); + if ( nNodes >= (1<<12) ) // because in Kit_Mux_t edge is 12 bit + return 0; + assert( nNodes == Cloud_DagSize( dd, pFunc ) ); + assert( nNodes < dd->nNodesLimit ); + Vec_IntClear( vNodes ); + Vec_IntPush( vNodes, 0 ); // const1 node + dd->ppNodes[0]->s = 0; + for ( i = 1; i < nNodes; i++ ) + { + dd->ppNodes[i]->s = i; + Mux.v = dd->ppNodes[i]->v; + Mux.t = dd->ppNodes[i]->t->s; + Mux.e = Cloud_Regular(dd->ppNodes[i]->e)->s; + Mux.c = Cloud_IsComplement(dd->ppNodes[i]->e); + Mux.i = (i == nNodes - 1)? Cloud_IsComplement(pFunc) : 0; + // put the MUX into the array + Vec_IntPush( vNodes, *((int *)&Mux) ); + } + assert( Vec_IntSize(vNodes) == nNodes ); + // reset signatures + for ( i = 0; i < nNodes; i++ ) + dd->ppNodes[i]->s = dd->nSignCur; + return 1; +} + +/**Function******************************************************************** + + Synopsis [Transforms the array of BDDs into the integer array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +int Kit_CreateCloudFromTruth( CloudManager * dd, unsigned * pTruth, int nVars, Vec_Int_t * vNodes ) +{ + CloudNode * pFunc; + Cloud_Restart( dd ); + pFunc = Kit_TruthToCloud( dd, pTruth, nVars ); + Vec_IntClear( vNodes ); + return Kit_CreateCloud( dd, pFunc, vNodes ); +} + +/**Function************************************************************* + + Synopsis [Computes composition of truth tables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_CloudToTruth( Vec_Int_t * vNodes, int nVars, Vec_Ptr_t * vStore, int fInv ) +{ + unsigned * pThis, * pFan0, * pFan1; + Kit_Mux_t Mux; + int i, Entry; + assert( Vec_IntSize(vNodes) <= Vec_PtrSize(vStore) ); + pThis = Vec_PtrEntry( vStore, 0 ); + Kit_TruthFill( pThis, nVars ); + Vec_IntForEachEntryStart( vNodes, Entry, i, 1 ) + { + Mux = *((Kit_Mux_t *)&Entry); + assert( (int)Mux.e < i && (int)Mux.t < i && (int)Mux.v < nVars ); + pFan0 = Vec_PtrEntry( vStore, Mux.e ); + pFan1 = Vec_PtrEntry( vStore, Mux.t ); + pThis = Vec_PtrEntry( vStore, i ); + Kit_TruthMuxVarPhase( pThis, pFan0, pFan1, nVars, fInv? Mux.v : nVars-1-Mux.v, Mux.c ); + } + // complement the result + if ( Mux.i ) + Kit_TruthNot( pThis, pThis, nVars ); + return pThis; +} + +/**Function************************************************************* + + Synopsis [Computes composition of truth tables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_TruthCompose( CloudManager * dd, unsigned * pTruth, int nVars, + unsigned ** pInputs, int nVarsAll, Vec_Ptr_t * vStore, Vec_Int_t * vNodes ) +{ + CloudNode * pFunc; + unsigned * pThis, * pFan0, * pFan1; + Kit_Mux_t Mux; + int i, Entry, RetValue; + // derive BDD from truth table + Cloud_Restart( dd ); + pFunc = Kit_TruthToCloud( dd, pTruth, nVars ); + // convert it into nodes + RetValue = Kit_CreateCloud( dd, pFunc, vNodes ); + if ( RetValue == 0 ) + printf( "Kit_TruthCompose(): Internal failure!!!\n" ); + // verify the result +// pFan0 = Kit_CloudToTruth( vNodes, nVars, vStore, 0 ); +// if ( !Kit_TruthIsEqual( pTruth, pFan0, nVars ) ) +// printf( "Failed!\n" ); + // compute truth table from the BDD + assert( Vec_IntSize(vNodes) <= Vec_PtrSize(vStore) ); + pThis = Vec_PtrEntry( vStore, 0 ); + Kit_TruthFill( pThis, nVarsAll ); + Vec_IntForEachEntryStart( vNodes, Entry, i, 1 ) + { + Mux = *((Kit_Mux_t *)&Entry); + pFan0 = Vec_PtrEntry( vStore, Mux.e ); + pFan1 = Vec_PtrEntry( vStore, Mux.t ); + pThis = Vec_PtrEntry( vStore, i ); + Kit_TruthMuxPhase( pThis, pFan0, pFan1, pInputs[nVars-1-Mux.v], nVarsAll, Mux.c ); + } + // complement the result + if ( Mux.i ) + Kit_TruthNot( pThis, pThis, nVarsAll ); + return pThis; +} + +/**Function******************************************************************** + + Synopsis [Compute BDD for the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +******************************************************************************/ +void Kit_TruthCofSupports( Vec_Int_t * vBddDir, Vec_Int_t * vBddInv, int nVars, Vec_Int_t * vMemory, unsigned * puSupps ) +{ + Kit_Mux_t Mux; + unsigned * puSuppAll, * pThis, * pFan0, * pFan1; + int i, v, Var, Entry, nSupps; + nSupps = 2 * nVars; + + // extend storage + if ( Vec_IntSize( vMemory ) < nSupps * Vec_IntSize(vBddDir) ) + Vec_IntGrow( vMemory, nSupps * Vec_IntSize(vBddDir) ); + puSuppAll = Vec_IntArray( vMemory ); + // clear storage for the const node + memset( puSuppAll, 0, sizeof(unsigned) * nSupps ); + // compute supports from nodes + Vec_IntForEachEntryStart( vBddDir, Entry, i, 1 ) + { + Mux = *((Kit_Mux_t *)&Entry); + Var = nVars - 1 - Mux.v; + pFan0 = puSuppAll + nSupps * Mux.e; + pFan1 = puSuppAll + nSupps * Mux.t; + pThis = puSuppAll + nSupps * i; + for ( v = 0; v < nSupps; v++ ) + pThis[v] = pFan0[v] | pFan1[v] | (1<<Var); + assert( pFan0[2*Var + 0] == pFan0[2*Var + 1] ); + assert( pFan1[2*Var + 0] == pFan1[2*Var + 1] ); + pThis[2*Var + 0] = pFan0[2*Var + 0];// | pFan0[2*Var + 1]; + pThis[2*Var + 1] = pFan1[2*Var + 0];// | pFan1[2*Var + 1]; + } + // copy the result + memcpy( puSupps, pThis, sizeof(unsigned) * nSupps ); + // compute the inverse + + // extend storage + if ( Vec_IntSize( vMemory ) < nSupps * Vec_IntSize(vBddInv) ) + Vec_IntGrow( vMemory, nSupps * Vec_IntSize(vBddInv) ); + puSuppAll = Vec_IntArray( vMemory ); + // clear storage for the const node + memset( puSuppAll, 0, sizeof(unsigned) * nSupps ); + // compute supports from nodes + Vec_IntForEachEntryStart( vBddInv, Entry, i, 1 ) + { + Mux = *((Kit_Mux_t *)&Entry); +// Var = nVars - 1 - Mux.v; + Var = Mux.v; + pFan0 = puSuppAll + nSupps * Mux.e; + pFan1 = puSuppAll + nSupps * Mux.t; + pThis = puSuppAll + nSupps * i; + for ( v = 0; v < nSupps; v++ ) + pThis[v] = pFan0[v] | pFan1[v] | (1<<Var); + assert( pFan0[2*Var + 0] == pFan0[2*Var + 1] ); + assert( pFan1[2*Var + 0] == pFan1[2*Var + 1] ); + pThis[2*Var + 0] = pFan0[2*Var + 0];// | pFan0[2*Var + 1]; + pThis[2*Var + 1] = pFan1[2*Var + 0];// | pFan1[2*Var + 1]; + } + + // merge supports + for ( Var = 0; Var < nSupps; Var++ ) + puSupps[Var] = (puSupps[Var] & Kit_BitMask(Var/2)) | (pThis[Var] & ~Kit_BitMask(Var/2)); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitDsd.c b/src/aig/kit/kitDsd.c new file mode 100644 index 00000000..e24a9964 --- /dev/null +++ b/src/aig/kit/kitDsd.c @@ -0,0 +1,2621 @@ +/**CFile**************************************************************** + + FileName [kitDsd.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Performs disjoint-support decomposition based on truth tables.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitDsd.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates the DSD manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdMan_t * Kit_DsdManAlloc( int nVars, int nNodes ) +{ + Kit_DsdMan_t * p; + p = ALLOC( Kit_DsdMan_t, 1 ); + memset( p, 0, sizeof(Kit_DsdMan_t) ); + p->nVars = nVars; + p->nWords = Kit_TruthWordNum( p->nVars ); + p->vTtElems = Vec_PtrAllocTruthTables( p->nVars ); + p->vTtNodes = Vec_PtrAllocSimInfo( nNodes, p->nWords ); + p->dd = Cloud_Init( 16, 14 ); + p->vTtBdds = Vec_PtrAllocSimInfo( (1<<12), p->nWords ); + p->vNodes = Vec_IntAlloc( 512 ); + return p; +} + +/**Function************************************************************* + + Synopsis [Deallocates the DSD manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdManFree( Kit_DsdMan_t * p ) +{ + Cloud_Quit( p->dd ); + Vec_IntFree( p->vNodes ); + Vec_PtrFree( p->vTtBdds ); + Vec_PtrFree( p->vTtElems ); + Vec_PtrFree( p->vTtNodes ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Allocates the DSD node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdObj_t * Kit_DsdObjAlloc( Kit_DsdNtk_t * pNtk, Kit_Dsd_t Type, int nFans ) +{ + Kit_DsdObj_t * pObj; + int nSize = sizeof(Kit_DsdObj_t) + sizeof(unsigned) * (Kit_DsdObjOffset(nFans) + (Type == KIT_DSD_PRIME) * Kit_TruthWordNum(nFans)); + pObj = (Kit_DsdObj_t *)ALLOC( char, nSize ); + memset( pObj, 0, nSize ); + pObj->Id = pNtk->nVars + pNtk->nNodes; + pObj->Type = Type; + pObj->nFans = nFans; + pObj->Offset = Kit_DsdObjOffset( nFans ); + // add the object + if ( pNtk->nNodes == pNtk->nNodesAlloc ) + { + pNtk->nNodesAlloc *= 2; + pNtk->pNodes = REALLOC( Kit_DsdObj_t *, pNtk->pNodes, pNtk->nNodesAlloc ); + } + assert( pNtk->nNodes < pNtk->nNodesAlloc ); + pNtk->pNodes[pNtk->nNodes++] = pObj; + return pObj; +} + +/**Function************************************************************* + + Synopsis [Deallocates the DSD node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdObjFree( Kit_DsdNtk_t * p, Kit_DsdObj_t * pObj ) +{ + free( pObj ); +} + +/**Function************************************************************* + + Synopsis [Allocates the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdNtkAlloc( int nVars ) +{ + Kit_DsdNtk_t * pNtk; + pNtk = ALLOC( Kit_DsdNtk_t, 1 ); + memset( pNtk, 0, sizeof(Kit_DsdNtk_t) ); + pNtk->pNodes = ALLOC( Kit_DsdObj_t *, nVars ); + pNtk->nVars = nVars; + pNtk->nNodesAlloc = nVars; + pNtk->pMem = ALLOC( unsigned, 6 * Kit_TruthWordNum(nVars) ); + return pNtk; +} + +/**Function************************************************************* + + Synopsis [Deallocate the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdNtkFree( Kit_DsdNtk_t * pNtk ) +{ + Kit_DsdObj_t * pObj; + unsigned i; + Kit_DsdNtkForEachObj( pNtk, pObj, i ) + free( pObj ); + FREE( pNtk->pSupps ); + free( pNtk->pNodes ); + free( pNtk->pMem ); + free( pNtk ); +} + +/**Function************************************************************* + + Synopsis [Prints the hex unsigned into a file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrintHex( FILE * pFile, unsigned * pTruth, int nFans ) +{ + int nDigits, Digit, k; + nDigits = (1 << nFans) / 4; + for ( k = nDigits - 1; k >= 0; k-- ) + { + Digit = ((pTruth[k/8] >> ((k%8) * 4)) & 15); + if ( Digit < 10 ) + fprintf( pFile, "%d", Digit ); + else + fprintf( pFile, "%c", 'A' + Digit-10 ); + } +} + +/**Function************************************************************* + + Synopsis [Recursively print the DSD formula.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrint_rec( FILE * pFile, Kit_DsdNtk_t * pNtk, int Id ) +{ + Kit_DsdObj_t * pObj; + unsigned iLit, i; + char Symbol; + + pObj = Kit_DsdNtkObj( pNtk, Id ); + if ( pObj == NULL ) + { + assert( Id < pNtk->nVars ); + fprintf( pFile, "%c", 'a' + Id ); + return; + } + + if ( pObj->Type == KIT_DSD_CONST1 ) + { + assert( pObj->nFans == 0 ); + fprintf( pFile, "Const1" ); + return; + } + + if ( pObj->Type == KIT_DSD_VAR ) + assert( pObj->nFans == 1 ); + + if ( pObj->Type == KIT_DSD_AND ) + Symbol = '*'; + else if ( pObj->Type == KIT_DSD_XOR ) + Symbol = '+'; + else + Symbol = ','; + + if ( pObj->Type == KIT_DSD_PRIME ) + Kit_DsdPrintHex( stdout, Kit_DsdObjTruth(pObj), pObj->nFans ); + + fprintf( pFile, "(" ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + if ( Kit_DsdLitIsCompl(iLit) ) + fprintf( pFile, "!" ); + Kit_DsdPrint_rec( pFile, pNtk, Kit_DsdLit2Var(iLit) ); + if ( i < pObj->nFans - 1 ) + fprintf( pFile, "%c", Symbol ); + } + fprintf( pFile, ")" ); +} + +/**Function************************************************************* + + Synopsis [Print the DSD formula.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrint( FILE * pFile, Kit_DsdNtk_t * pNtk ) +{ + fprintf( pFile, "F = " ); + if ( Kit_DsdLitIsCompl(pNtk->Root) ) + fprintf( pFile, "!" ); + Kit_DsdPrint_rec( pFile, pNtk, Kit_DsdLit2Var(pNtk->Root) ); + fprintf( pFile, "\n" ); +} + +/**Function************************************************************* + + Synopsis [Print the DSD formula.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrintExpanded( Kit_DsdNtk_t * pNtk ) +{ + Kit_DsdNtk_t * pTemp; + pTemp = Kit_DsdExpand( pNtk ); + Kit_DsdPrint( stdout, pTemp ); + Kit_DsdNtkFree( pTemp ); +} + +/**Function************************************************************* + + Synopsis [Print the DSD formula.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrintFromTruth( unsigned * pTruth, int nVars ) +{ + Kit_DsdNtk_t * pTemp; + pTemp = Kit_DsdDecomposeMux( pTruth, nVars, 5 ); + Kit_DsdVerify( pTemp, pTruth, nVars ); + Kit_DsdPrintExpanded( pTemp ); + Kit_DsdNtkFree( pTemp ); +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_DsdTruthComputeNode_rec( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, int Id ) +{ + Kit_DsdObj_t * pObj; + unsigned * pTruthRes, * pTruthFans[16], * pTruthTemp; + unsigned i, iLit, fCompl; +// unsigned m, nMints, * pTruthPrime, * pTruthMint; + + // get the node with this ID + pObj = Kit_DsdNtkObj( pNtk, Id ); + pTruthRes = Vec_PtrEntry( p->vTtNodes, Id ); + + // special case: literal of an internal node + if ( pObj == NULL ) + { + assert( Id < pNtk->nVars ); + return pTruthRes; + } + + // constant node + if ( pObj->Type == KIT_DSD_CONST1 ) + { + assert( pObj->nFans == 0 ); + Kit_TruthFill( pTruthRes, pNtk->nVars ); + return pTruthRes; + } + + // elementary variable node + if ( pObj->Type == KIT_DSD_VAR ) + { + assert( pObj->nFans == 1 ); + iLit = pObj->pFans[0]; + pTruthFans[0] = Kit_DsdTruthComputeNode_rec( p, pNtk, Kit_DsdLit2Var(iLit) ); + if ( Kit_DsdLitIsCompl(iLit) ) + Kit_TruthNot( pTruthRes, pTruthFans[0], pNtk->nVars ); + else + Kit_TruthCopy( pTruthRes, pTruthFans[0], pNtk->nVars ); + return pTruthRes; + } + + // collect the truth tables of the fanins + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + pTruthFans[i] = Kit_DsdTruthComputeNode_rec( p, pNtk, Kit_DsdLit2Var(iLit) ); + // create the truth table + + // simple gates + if ( pObj->Type == KIT_DSD_AND ) + { + Kit_TruthFill( pTruthRes, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + Kit_TruthAndPhase( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars, 0, Kit_DsdLitIsCompl(iLit) ); + return pTruthRes; + } + if ( pObj->Type == KIT_DSD_XOR ) + { + Kit_TruthClear( pTruthRes, pNtk->nVars ); + fCompl = 0; + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + Kit_TruthXor( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars ); + fCompl ^= Kit_DsdLitIsCompl(iLit); + } + if ( fCompl ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; + } + assert( pObj->Type == KIT_DSD_PRIME ); +/* + // get the truth table of the prime node + pTruthPrime = Kit_DsdObjTruth( pObj ); + // get storage for the temporary minterm + pTruthMint = Vec_PtrEntry(p->vTtNodes, pNtk->nVars + pNtk->nNodes); + + // go through the minterms + nMints = (1 << pObj->nFans); + Kit_TruthClear( pTruthRes, pNtk->nVars ); + for ( m = 0; m < nMints; m++ ) + { + if ( !Kit_TruthHasBit(pTruthPrime, m) ) + continue; + Kit_TruthFill( pTruthMint, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + Kit_TruthAndPhase( pTruthMint, pTruthMint, pTruthFans[i], pNtk->nVars, 0, ((m & (1<<i)) == 0) ^ Kit_DsdLitIsCompl(iLit) ); + Kit_TruthOr( pTruthRes, pTruthRes, pTruthMint, pNtk->nVars ); + } +*/ + pTruthTemp = Kit_TruthCompose( p->dd, Kit_DsdObjTruth(pObj), pObj->nFans, pTruthFans, pNtk->nVars, p->vTtBdds, p->vNodes ); + Kit_TruthCopy( pTruthRes, pTruthTemp, pNtk->nVars ); + return pTruthRes; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_DsdTruthCompute( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk ) +{ + unsigned * pTruthRes; + int i; + // assign elementary truth ables + assert( pNtk->nVars <= p->nVars ); + for ( i = 0; i < (int)pNtk->nVars; i++ ) + Kit_TruthCopy( Vec_PtrEntry(p->vTtNodes, i), Vec_PtrEntry(p->vTtElems, i), p->nVars ); + // compute truth table for each node + pTruthRes = Kit_DsdTruthComputeNode_rec( p, pNtk, Kit_DsdLit2Var(pNtk->Root) ); + // complement the truth table if needed + if ( Kit_DsdLitIsCompl(pNtk->Root) ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_DsdTruthComputeNodeOne_rec( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, int Id, unsigned uSupp ) +{ + Kit_DsdObj_t * pObj; + unsigned * pTruthRes, * pTruthFans[16], * pTruthTemp; + unsigned i, iLit, fCompl, nPartial = 0; +// unsigned m, nMints, * pTruthPrime, * pTruthMint; + + // get the node with this ID + pObj = Kit_DsdNtkObj( pNtk, Id ); + pTruthRes = Vec_PtrEntry( p->vTtNodes, Id ); + + // special case: literal of an internal node + if ( pObj == NULL ) + { + assert( Id < pNtk->nVars ); + assert( !uSupp || uSupp != (uSupp & ~(1<<Id)) ); + return pTruthRes; + } + + // constant node + if ( pObj->Type == KIT_DSD_CONST1 ) + { + assert( pObj->nFans == 0 ); + Kit_TruthFill( pTruthRes, pNtk->nVars ); + return pTruthRes; + } + + // elementary variable node + if ( pObj->Type == KIT_DSD_VAR ) + { + assert( pObj->nFans == 1 ); + iLit = pObj->pFans[0]; + assert( Kit_DsdLitIsLeaf( pNtk, iLit ) ); + pTruthFans[0] = Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Kit_DsdLit2Var(iLit), uSupp ); + if ( Kit_DsdLitIsCompl(iLit) ) + Kit_TruthNot( pTruthRes, pTruthFans[0], pNtk->nVars ); + else + Kit_TruthCopy( pTruthRes, pTruthFans[0], pNtk->nVars ); + return pTruthRes; + } + + // collect the truth tables of the fanins + if ( uSupp ) + { + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + if ( uSupp != (uSupp & ~Kit_DsdLitSupport(pNtk, iLit)) ) + pTruthFans[i] = Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Kit_DsdLit2Var(iLit), uSupp ); + else + { + pTruthFans[i] = NULL; + nPartial = 1; + } + } + else + { + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + pTruthFans[i] = Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Kit_DsdLit2Var(iLit), uSupp ); + } + // create the truth table + + // simple gates + if ( pObj->Type == KIT_DSD_AND ) + { + Kit_TruthFill( pTruthRes, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + if ( pTruthFans[i] ) + Kit_TruthAndPhase( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars, 0, Kit_DsdLitIsCompl(iLit) ); + return pTruthRes; + } + if ( pObj->Type == KIT_DSD_XOR ) + { + Kit_TruthClear( pTruthRes, pNtk->nVars ); + fCompl = 0; + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + if ( pTruthFans[i] ) + { + Kit_TruthXor( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars ); + fCompl ^= Kit_DsdLitIsCompl(iLit); + } + } + if ( fCompl ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; + } + assert( pObj->Type == KIT_DSD_PRIME ); + + if ( uSupp && nPartial ) + { + // find the only non-empty component + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + if ( pTruthFans[i] ) + break; + assert( i < pObj->nFans ); + return pTruthFans[i]; + } +/* + // get the truth table of the prime node + pTruthPrime = Kit_DsdObjTruth( pObj ); + // get storage for the temporary minterm + pTruthMint = Vec_PtrEntry(p->vTtNodes, pNtk->nVars + pNtk->nNodes); + + // go through the minterms + nMints = (1 << pObj->nFans); + Kit_TruthClear( pTruthRes, pNtk->nVars ); + for ( m = 0; m < nMints; m++ ) + { + if ( !Kit_TruthHasBit(pTruthPrime, m) ) + continue; + Kit_TruthFill( pTruthMint, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + Kit_TruthAndPhase( pTruthMint, pTruthMint, pTruthFans[i], pNtk->nVars, 0, ((m & (1<<i)) == 0) ^ Kit_DsdLitIsCompl(iLit) ); + Kit_TruthOr( pTruthRes, pTruthRes, pTruthMint, pNtk->nVars ); + } +*/ + pTruthTemp = Kit_TruthCompose( p->dd, Kit_DsdObjTruth(pObj), pObj->nFans, pTruthFans, pNtk->nVars, p->vTtBdds, p->vNodes ); + Kit_TruthCopy( pTruthRes, pTruthTemp, pNtk->nVars ); + return pTruthRes; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_DsdTruthComputeOne( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, unsigned uSupp ) +{ + unsigned * pTruthRes; + int i; + // if support is specified, request that supports are available + if ( uSupp ) + Kit_DsdGetSupports( pNtk ); + // assign elementary truth tables + assert( pNtk->nVars <= p->nVars ); + for ( i = 0; i < (int)pNtk->nVars; i++ ) + Kit_TruthCopy( Vec_PtrEntry(p->vTtNodes, i), Vec_PtrEntry(p->vTtElems, i), p->nVars ); + // compute truth table for each node + pTruthRes = Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Kit_DsdLit2Var(pNtk->Root), uSupp ); + // complement the truth table if needed + if ( Kit_DsdLitIsCompl(pNtk->Root) ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_DsdTruthComputeNodeTwo_rec( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, int Id, unsigned uSupp, int iVar, unsigned * pTruthDec ) +{ + Kit_DsdObj_t * pObj; + int pfBoundSet[16]; + unsigned * pTruthRes, * pTruthFans[16], * pTruthTemp; + unsigned i, iLit, fCompl, nPartial, uSuppFan, uSuppCur; +// unsigned m, nMints, * pTruthPrime, * pTruthMint; + assert( uSupp > 0 ); + + // get the node with this ID + pObj = Kit_DsdNtkObj( pNtk, Id ); + pTruthRes = Vec_PtrEntry( p->vTtNodes, Id ); + if ( pObj == NULL ) + { + assert( Id < pNtk->nVars ); + return pTruthRes; + } + assert( pObj->Type != KIT_DSD_CONST1 ); + assert( pObj->Type != KIT_DSD_VAR ); + + // count the number of intersecting fanins + // collect the total support of the intersecting fanins + nPartial = 0; + uSuppFan = 0; + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + uSuppCur = Kit_DsdLitSupport(pNtk, iLit); + if ( uSupp & uSuppCur ) + { + nPartial++; + uSuppFan |= uSuppCur; + } + } + + // if there is no intersection, or full intersection, use simple procedure + if ( nPartial == 0 || nPartial == pObj->nFans ) + return Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Id, 0 ); + + // if support of the component includes some other variables + // we need to continue constructing it as usual by the two-function procedure + if ( uSuppFan != (uSuppFan & uSupp) ) + { + assert( nPartial == 1 ); +// return Kit_DsdTruthComputeNodeTwo_rec( p, pNtk, Id, uSupp, iVar, pTruthDec ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + if ( uSupp & Kit_DsdLitSupport(pNtk, iLit) ) + pTruthFans[i] = Kit_DsdTruthComputeNodeTwo_rec( p, pNtk, Kit_DsdLit2Var(iLit), uSupp, iVar, pTruthDec ); + else + pTruthFans[i] = Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Kit_DsdLit2Var(iLit), 0 ); + } + + // create composition/decomposition functions + if ( pObj->Type == KIT_DSD_AND ) + { + Kit_TruthFill( pTruthRes, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + Kit_TruthAndPhase( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars, 0, Kit_DsdLitIsCompl(iLit) ); + return pTruthRes; + } + if ( pObj->Type == KIT_DSD_XOR ) + { + Kit_TruthClear( pTruthRes, pNtk->nVars ); + fCompl = 0; + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + fCompl ^= Kit_DsdLitIsCompl(iLit); + Kit_TruthXor( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars ); + } + if ( fCompl ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; + } + assert( pObj->Type == KIT_DSD_PRIME ); + } + else + { + assert( uSuppFan == (uSuppFan & uSupp) ); + assert( nPartial < pObj->nFans ); + // the support of the insecting component(s) is contained in the bound-set + // and yet there are components that are not contained in the bound set + + // solve the fanins and collect info, which components belong to the bound set + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + pTruthFans[i] = Kit_DsdTruthComputeNodeOne_rec( p, pNtk, Kit_DsdLit2Var(iLit), 0 ); + pfBoundSet[i] = (int)((uSupp & Kit_DsdLitSupport(pNtk, iLit)) > 0); + } + + // create composition/decomposition functions + if ( pObj->Type == KIT_DSD_AND ) + { + Kit_TruthIthVar( pTruthRes, pNtk->nVars, iVar ); + Kit_TruthFill( pTruthDec, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + if ( pfBoundSet[i] ) + Kit_TruthAndPhase( pTruthDec, pTruthDec, pTruthFans[i], pNtk->nVars, 0, Kit_DsdLitIsCompl(iLit) ); + else + Kit_TruthAndPhase( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars, 0, Kit_DsdLitIsCompl(iLit) ); + return pTruthRes; + } + if ( pObj->Type == KIT_DSD_XOR ) + { + Kit_TruthIthVar( pTruthRes, pNtk->nVars, iVar ); + Kit_TruthClear( pTruthDec, pNtk->nVars ); + fCompl = 0; + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + { + fCompl ^= Kit_DsdLitIsCompl(iLit); + if ( pfBoundSet[i] ) + Kit_TruthXor( pTruthDec, pTruthDec, pTruthFans[i], pNtk->nVars ); + else + Kit_TruthXor( pTruthRes, pTruthRes, pTruthFans[i], pNtk->nVars ); + } + if ( fCompl ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; + } + assert( pObj->Type == KIT_DSD_PRIME ); + assert( nPartial == 1 ); + + // find the only non-empty component + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + if ( pfBoundSet[i] ) + break; + assert( i < pObj->nFans ); + + // save this component as the decomposed function + Kit_TruthCopy( pTruthDec, pTruthFans[i], pNtk->nVars ); + // set the corresponding component to be the new variable + Kit_TruthIthVar( pTruthFans[i], pNtk->nVars, iVar ); + } +/* + // get the truth table of the prime node + pTruthPrime = Kit_DsdObjTruth( pObj ); + // get storage for the temporary minterm + pTruthMint = Vec_PtrEntry(p->vTtNodes, pNtk->nVars + pNtk->nNodes); + + // go through the minterms + nMints = (1 << pObj->nFans); + Kit_TruthClear( pTruthRes, pNtk->nVars ); + for ( m = 0; m < nMints; m++ ) + { + if ( !Kit_TruthHasBit(pTruthPrime, m) ) + continue; + Kit_TruthFill( pTruthMint, pNtk->nVars ); + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + Kit_TruthAndPhase( pTruthMint, pTruthMint, pTruthFans[i], pNtk->nVars, 0, ((m & (1<<i)) == 0) ^ Kit_DsdLitIsCompl(iLit) ); + Kit_TruthOr( pTruthRes, pTruthRes, pTruthMint, pNtk->nVars ); + } +*/ + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + assert( !Kit_DsdLitIsCompl(iLit) ); + pTruthTemp = Kit_TruthCompose( p->dd, Kit_DsdObjTruth(pObj), pObj->nFans, pTruthFans, pNtk->nVars, p->vTtBdds, p->vNodes ); + Kit_TruthCopy( pTruthRes, pTruthTemp, pNtk->nVars ); + return pTruthRes; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_DsdTruthComputeTwo( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, unsigned uSupp, int iVar, unsigned * pTruthDec ) +{ + unsigned * pTruthRes, uSuppAll; + int i; + assert( uSupp > 0 ); + assert( pNtk->nVars <= p->nVars ); + // compute support of all nodes + uSuppAll = Kit_DsdGetSupports( pNtk ); + // consider special case - there is no overlap + if ( (uSupp & uSuppAll) == 0 ) + { + Kit_TruthClear( pTruthDec, pNtk->nVars ); + return Kit_DsdTruthCompute( p, pNtk ); + } + // consider special case - support is fully contained + if ( (uSupp & uSuppAll) == uSuppAll ) + { + pTruthRes = Kit_DsdTruthCompute( p, pNtk ); + Kit_TruthCopy( pTruthDec, pTruthRes, pNtk->nVars ); + Kit_TruthIthVar( pTruthRes, pNtk->nVars, iVar ); + return pTruthRes; + } + // assign elementary truth tables + for ( i = 0; i < (int)pNtk->nVars; i++ ) + Kit_TruthCopy( Vec_PtrEntry(p->vTtNodes, i), Vec_PtrEntry(p->vTtElems, i), p->nVars ); + // compute truth table for each node + pTruthRes = Kit_DsdTruthComputeNodeTwo_rec( p, pNtk, Kit_DsdLit2Var(pNtk->Root), uSupp, iVar, pTruthDec ); + // complement the truth table if needed + if ( Kit_DsdLitIsCompl(pNtk->Root) ) + Kit_TruthNot( pTruthRes, pTruthRes, pNtk->nVars ); + return pTruthRes; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdTruth( Kit_DsdNtk_t * pNtk, unsigned * pTruthRes ) +{ + Kit_DsdMan_t * p; + unsigned * pTruth; + p = Kit_DsdManAlloc( pNtk->nVars, Kit_DsdNtkObjNum(pNtk) ); + pTruth = Kit_DsdTruthCompute( p, pNtk ); + Kit_TruthCopy( pTruthRes, pTruth, pNtk->nVars ); + Kit_DsdManFree( p ); +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdTruthPartialTwo( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, unsigned uSupp, int iVar, unsigned * pTruthCo, unsigned * pTruthDec ) +{ + unsigned * pTruth = Kit_DsdTruthComputeTwo( p, pNtk, uSupp, iVar, pTruthDec ); + if ( pTruthCo ) + Kit_TruthCopy( pTruthCo, pTruth, pNtk->nVars ); +} + +/**Function************************************************************* + + Synopsis [Derives the truth table of the DSD network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdTruthPartial( Kit_DsdMan_t * p, Kit_DsdNtk_t * pNtk, unsigned * pTruthRes, unsigned uSupp ) +{ + unsigned * pTruth = Kit_DsdTruthComputeOne( p, pNtk, uSupp ); + Kit_TruthCopy( pTruthRes, pTruth, pNtk->nVars ); +/* + // verification + { + // compute the same function using different procedure + unsigned * pTruthTemp = Vec_PtrEntry(p->vTtNodes, pNtk->nVars + pNtk->nNodes + 1); + pNtk->pSupps = NULL; + Kit_DsdTruthComputeTwo( p, pNtk, uSupp, -1, pTruthTemp ); +// if ( !Kit_TruthIsEqual( pTruthTemp, pTruthRes, pNtk->nVars ) ) + if ( !Kit_TruthIsEqualWithPhase( pTruthTemp, pTruthRes, pNtk->nVars ) ) + { + printf( "Verification FAILED!\n" ); + Kit_DsdPrint( stdout, pNtk ); + Kit_DsdPrintFromTruth( pTruthRes, pNtk->nVars ); + Kit_DsdPrintFromTruth( pTruthTemp, pNtk->nVars ); + } +// else +// printf( "Verification successful.\n" ); + } +*/ +} + +/**Function************************************************************* + + Synopsis [Counts the number of blocks of the given number of inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdCountLuts_rec( Kit_DsdNtk_t * pNtk, int nLutSize, int Id, int * pCounter ) +{ + Kit_DsdObj_t * pObj; + unsigned iLit, i, Res0, Res1; + pObj = Kit_DsdNtkObj( pNtk, Id ); + if ( pObj == NULL ) + return 0; + if ( pObj->Type == KIT_DSD_AND || pObj->Type == KIT_DSD_XOR ) + { + assert( pObj->nFans == 2 ); + Res0 = Kit_DsdCountLuts_rec( pNtk, nLutSize, Kit_DsdLit2Var(pObj->pFans[0]), pCounter ); + Res1 = Kit_DsdCountLuts_rec( pNtk, nLutSize, Kit_DsdLit2Var(pObj->pFans[1]), pCounter ); + if ( Res0 == 0 && Res1 > 0 ) + return Res1 - 1; + if ( Res0 > 0 && Res1 == 0 ) + return Res0 - 1; + (*pCounter)++; + return nLutSize - 2; + } + assert( pObj->Type == KIT_DSD_PRIME ); + if ( (int)pObj->nFans > nLutSize ) //+ 1 ) + { + *pCounter = 1000; + return 0; + } + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + Kit_DsdCountLuts_rec( pNtk, nLutSize, Kit_DsdLit2Var(iLit), pCounter ); + (*pCounter)++; +// if ( (int)pObj->nFans == nLutSize + 1 ) +// (*pCounter)++; + return nLutSize - pObj->nFans; +} + +/**Function************************************************************* + + Synopsis [Counts the number of blocks of the given number of inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdCountLuts( Kit_DsdNtk_t * pNtk, int nLutSize ) +{ + int Counter = 0; + if ( Kit_DsdNtkRoot(pNtk)->Type == KIT_DSD_CONST1 ) + return 0; + if ( Kit_DsdNtkRoot(pNtk)->Type == KIT_DSD_VAR ) + return 0; + Kit_DsdCountLuts_rec( pNtk, nLutSize, Kit_DsdLit2Var(pNtk->Root), &Counter ); + if ( Counter >= 1000 ) + return -1; + return Counter; +} + +/**Function************************************************************* + + Synopsis [Counts the number of blocks of the given number of inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdNonDsdSizeMax( Kit_DsdNtk_t * pNtk ) +{ + Kit_DsdObj_t * pObj; + unsigned i, nSizeMax = 0; + Kit_DsdNtkForEachObj( pNtk, pObj, i ) + { + if ( pObj->Type != KIT_DSD_PRIME ) + continue; + if ( nSizeMax < pObj->nFans ) + nSizeMax = pObj->nFans; + } + return nSizeMax; +} + +/**Function************************************************************* + + Synopsis [Finds the union of supports of the non-DSD blocks.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_DsdNonDsdSupports( Kit_DsdNtk_t * pNtk ) +{ + Kit_DsdObj_t * pObj; + unsigned i, uSupport = 0; +// FREE( pNtk->pSupps ); + Kit_DsdGetSupports( pNtk ); + Kit_DsdNtkForEachObj( pNtk, pObj, i ) + { + if ( pObj->Type != KIT_DSD_PRIME ) + continue; + uSupport |= Kit_DsdLitSupport( pNtk, Kit_DsdVar2Lit(pObj->Id,0) ); + } + return uSupport; +} + + +/**Function************************************************************* + + Synopsis [Expands the node.] + + Description [Returns the new literal.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdExpandCollectAnd_rec( Kit_DsdNtk_t * p, int iLit, int * piLitsNew, int * nLitsNew ) +{ + Kit_DsdObj_t * pObj; + unsigned i, iLitFanin; + // check the end of the supergate + pObj = Kit_DsdNtkObj( p, Kit_DsdLit2Var(iLit) ); + if ( Kit_DsdLitIsCompl(iLit) || Kit_DsdLit2Var(iLit) < p->nVars || pObj->Type != KIT_DSD_AND ) + { + piLitsNew[(*nLitsNew)++] = iLit; + return; + } + // iterate through the fanins + Kit_DsdObjForEachFanin( p, pObj, iLitFanin, i ) + Kit_DsdExpandCollectAnd_rec( p, iLitFanin, piLitsNew, nLitsNew ); +} + +/**Function************************************************************* + + Synopsis [Expands the node.] + + Description [Returns the new literal.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdExpandCollectXor_rec( Kit_DsdNtk_t * p, int iLit, int * piLitsNew, int * nLitsNew ) +{ + Kit_DsdObj_t * pObj; + unsigned i, iLitFanin; + // check the end of the supergate + pObj = Kit_DsdNtkObj( p, Kit_DsdLit2Var(iLit) ); + if ( Kit_DsdLit2Var(iLit) < p->nVars || pObj->Type != KIT_DSD_XOR ) + { + piLitsNew[(*nLitsNew)++] = iLit; + return; + } + // iterate through the fanins + pObj = Kit_DsdNtkObj( p, Kit_DsdLit2Var(iLit) ); + Kit_DsdObjForEachFanin( p, pObj, iLitFanin, i ) + Kit_DsdExpandCollectXor_rec( p, iLitFanin, piLitsNew, nLitsNew ); + // if the literal was complemented, pass the complemented attribute somewhere + if ( Kit_DsdLitIsCompl(iLit) ) + piLitsNew[0] = Kit_DsdLitNot( piLitsNew[0] ); +} + +/**Function************************************************************* + + Synopsis [Expands the node.] + + Description [Returns the new literal.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdExpandNode_rec( Kit_DsdNtk_t * pNew, Kit_DsdNtk_t * p, int iLit ) +{ + unsigned * pTruth, * pTruthNew; + unsigned i, iLitFanin, piLitsNew[16], nLitsNew = 0; + Kit_DsdObj_t * pObj, * pObjNew; + + // consider the case of simple gate + pObj = Kit_DsdNtkObj( p, Kit_DsdLit2Var(iLit) ); + if ( pObj == NULL ) + return iLit; + if ( pObj->Type == KIT_DSD_AND ) + { + Kit_DsdExpandCollectAnd_rec( p, Kit_DsdLitRegular(iLit), piLitsNew, &nLitsNew ); + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_AND, nLitsNew ); + for ( i = 0; i < pObjNew->nFans; i++ ) + pObjNew->pFans[i] = Kit_DsdExpandNode_rec( pNew, p, piLitsNew[i] ); + return Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(iLit) ); + } + if ( pObj->Type == KIT_DSD_XOR ) + { + int fCompl = Kit_DsdLitIsCompl(iLit); + Kit_DsdExpandCollectXor_rec( p, Kit_DsdLitRegular(iLit), piLitsNew, &nLitsNew ); + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_XOR, nLitsNew ); + for ( i = 0; i < pObjNew->nFans; i++ ) + { + pObjNew->pFans[i] = Kit_DsdExpandNode_rec( pNew, p, Kit_DsdLitRegular(piLitsNew[i]) ); + fCompl ^= Kit_DsdLitIsCompl(piLitsNew[i]); + } + return Kit_DsdVar2Lit( pObjNew->Id, fCompl ); + } + assert( pObj->Type == KIT_DSD_PRIME ); + + // create new PRIME node + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_PRIME, pObj->nFans ); + // copy the truth table + pTruth = Kit_DsdObjTruth( pObj ); + pTruthNew = Kit_DsdObjTruth( pObjNew ); + Kit_TruthCopy( pTruthNew, pTruth, pObj->nFans ); + // create fanins + Kit_DsdObjForEachFanin( pNtk, pObj, iLitFanin, i ) + { + pObjNew->pFans[i] = Kit_DsdExpandNode_rec( pNew, p, iLitFanin ); + // complement the corresponding inputs of the truth table + if ( Kit_DsdLitIsCompl(pObjNew->pFans[i]) ) + { + pObjNew->pFans[i] = Kit_DsdLitRegular(pObjNew->pFans[i]); + Kit_TruthChangePhase( pTruthNew, pObjNew->nFans, i ); + } + } + // if the incoming phase is complemented, absorb it into the prime node + if ( Kit_DsdLitIsCompl(iLit) ) + Kit_TruthNot( pTruthNew, pTruthNew, pObj->nFans ); + return Kit_DsdVar2Lit( pObjNew->Id, 0 ); +} + +/**Function************************************************************* + + Synopsis [Expands the network.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdExpand( Kit_DsdNtk_t * p ) +{ + Kit_DsdNtk_t * pNew; + Kit_DsdObj_t * pObjNew; + assert( p->nVars <= 16 ); + // create a new network + pNew = Kit_DsdNtkAlloc( p->nVars ); + // consider simple special cases + if ( Kit_DsdNtkRoot(p)->Type == KIT_DSD_CONST1 ) + { + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_CONST1, 0 ); + pNew->Root = Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(p->Root) ); + return pNew; + } + if ( Kit_DsdNtkRoot(p)->Type == KIT_DSD_VAR ) + { + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_VAR, 1 ); + pObjNew->pFans[0] = Kit_DsdNtkRoot(p)->pFans[0]; + pNew->Root = Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(p->Root) ); + return pNew; + } + // convert the root node + pNew->Root = Kit_DsdExpandNode_rec( pNew, p, p->Root ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Sorts the literals by their support.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdCompSort( int pPrios[], unsigned uSupps[], unsigned char * piLits, int nVars, int piLitsRes[] ) +{ + int nSuppSizes[16], Priority[16], pOrder[16]; + int i, k, iVarBest, SuppMax, PrioMax; + // compute support sizes and priorities of the components + for ( i = 0; i < nVars; i++ ) + { + assert( uSupps[i] ); + pOrder[i] = i; + Priority[i] = KIT_INFINITY; + for ( k = 0; k < 16; k++ ) + if ( uSupps[i] & (1 << k) ) + Priority[i] = KIT_MIN( Priority[i], pPrios[k] ); + assert( Priority[i] != 16 ); + nSuppSizes[i] = Kit_WordCountOnes(uSupps[i]); + } + // sort the components by pririty + Extra_BubbleSort( pOrder, Priority, nVars, 0 ); + // find the component by with largest size and lowest priority + iVarBest = -1; + SuppMax = 0; + PrioMax = 0; + for ( i = 0; i < nVars; i++ ) + { + if ( SuppMax < nSuppSizes[i] || (SuppMax == nSuppSizes[i] && PrioMax < Priority[i]) ) + { + SuppMax = nSuppSizes[i]; + PrioMax = Priority[i]; + iVarBest = i; + } + } + assert( iVarBest != -1 ); + // copy the resulting literals + k = 0; + piLitsRes[k++] = piLits[iVarBest]; + for ( i = 0; i < nVars; i++ ) + { + if ( pOrder[i] == iVarBest ) + continue; + piLitsRes[k++] = piLits[pOrder[i]]; + } + assert( k == nVars ); +} + +/**Function************************************************************* + + Synopsis [Shrinks multi-input nodes.] + + Description [Takes the array of variable priorities pPrios.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdShrink_rec( Kit_DsdNtk_t * pNew, Kit_DsdNtk_t * p, int iLit, int pPrios[] ) +{ + Kit_DsdObj_t * pObj, * pObjNew; + unsigned * pTruth, * pTruthNew; + unsigned i, piLitsNew[16], uSupps[16]; + int iLitFanin, iLitNew; + + // consider the case of simple gate + pObj = Kit_DsdNtkObj( p, Kit_DsdLit2Var(iLit) ); + if ( pObj == NULL ) + return iLit; + if ( pObj->Type == KIT_DSD_AND ) + { + // get the supports + Kit_DsdObjForEachFanin( p, pObj, iLitFanin, i ) + uSupps[i] = Kit_DsdLitSupport( p, iLitFanin ); + // put the largest component last + // sort other components in the decreasing order of priority of their vars + Kit_DsdCompSort( pPrios, uSupps, pObj->pFans, pObj->nFans, piLitsNew ); + // construct the two-input node network + iLitNew = Kit_DsdShrink_rec( pNew, p, piLitsNew[0], pPrios ); + for ( i = 1; i < pObj->nFans; i++ ) + { + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_AND, 2 ); + pObjNew->pFans[0] = Kit_DsdShrink_rec( pNew, p, piLitsNew[i], pPrios ); + pObjNew->pFans[1] = iLitNew; + iLitNew = Kit_DsdVar2Lit( pObjNew->Id, 0 ); + } + return Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(iLit) ); + } + if ( pObj->Type == KIT_DSD_XOR ) + { + // get the supports + Kit_DsdObjForEachFanin( p, pObj, iLitFanin, i ) + { + assert( !Kit_DsdLitIsCompl(iLitFanin) ); + uSupps[i] = Kit_DsdLitSupport( p, iLitFanin ); + } + // put the largest component last + // sort other components in the decreasing order of priority of their vars + Kit_DsdCompSort( pPrios, uSupps, pObj->pFans, pObj->nFans, piLitsNew ); + // construct the two-input node network + iLitNew = Kit_DsdShrink_rec( pNew, p, piLitsNew[0], pPrios ); + for ( i = 1; i < pObj->nFans; i++ ) + { + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_XOR, 2 ); + pObjNew->pFans[0] = Kit_DsdShrink_rec( pNew, p, piLitsNew[i], pPrios ); + pObjNew->pFans[1] = iLitNew; + iLitNew = Kit_DsdVar2Lit( pObjNew->Id, 0 ); + } + return Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(iLit) ); + } + assert( pObj->Type == KIT_DSD_PRIME ); + + // create new PRIME node + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_PRIME, pObj->nFans ); + // copy the truth table + pTruth = Kit_DsdObjTruth( pObj ); + pTruthNew = Kit_DsdObjTruth( pObjNew ); + Kit_TruthCopy( pTruthNew, pTruth, pObj->nFans ); + // create fanins + Kit_DsdObjForEachFanin( pNtk, pObj, iLitFanin, i ) + { + pObjNew->pFans[i] = Kit_DsdShrink_rec( pNew, p, iLitFanin, pPrios ); + // complement the corresponding inputs of the truth table + if ( Kit_DsdLitIsCompl(pObjNew->pFans[i]) ) + { + pObjNew->pFans[i] = Kit_DsdLitRegular(pObjNew->pFans[i]); + Kit_TruthChangePhase( pTruthNew, pObjNew->nFans, i ); + } + } + // if the incoming phase is complemented, absorb it into the prime node + if ( Kit_DsdLitIsCompl(iLit) ) + Kit_TruthNot( pTruthNew, pTruthNew, pObj->nFans ); + return Kit_DsdVar2Lit( pObjNew->Id, 0 ); +} + +/**Function************************************************************* + + Synopsis [Shrinks the network.] + + Description [Transforms the network to have two-input nodes so that the + higher-ordered nodes were decomposed out first.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdShrink( Kit_DsdNtk_t * p, int pPrios[] ) +{ + Kit_DsdNtk_t * pNew; + Kit_DsdObj_t * pObjNew; + assert( p->nVars <= 16 ); + // create a new network + pNew = Kit_DsdNtkAlloc( p->nVars ); + // consider simple special cases + if ( Kit_DsdNtkRoot(p)->Type == KIT_DSD_CONST1 ) + { + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_CONST1, 0 ); + pNew->Root = Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(p->Root) ); + return pNew; + } + if ( Kit_DsdNtkRoot(p)->Type == KIT_DSD_VAR ) + { + pObjNew = Kit_DsdObjAlloc( pNew, KIT_DSD_VAR, 1 ); + pObjNew->pFans[0] = Kit_DsdNtkRoot(p)->pFans[0]; + pNew->Root = Kit_DsdVar2Lit( pObjNew->Id, Kit_DsdLitIsCompl(p->Root) ); + return pNew; + } + // convert the root node + pNew->Root = Kit_DsdShrink_rec( pNew, p, p->Root, pPrios ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Rotates the network.] + + Description [Transforms prime nodes to have the fanin with the + highest frequency of supports go first.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdRotate( Kit_DsdNtk_t * p, int pFreqs[] ) +{ + Kit_DsdObj_t * pObj; + unsigned * pIn, * pOut, * pTemp, k; + int i, v, Temp, uSuppFanin, iFaninLit, WeightMax, FaninMax, nSwaps; + int Weights[16]; + // go through the prime nodes + Kit_DsdNtkForEachObj( p, pObj, i ) + { + if ( pObj->Type != KIT_DSD_PRIME ) + continue; + // count the fanin frequencies + Kit_DsdObjForEachFanin( p, pObj, iFaninLit, k ) + { + uSuppFanin = Kit_DsdLitSupport( p, iFaninLit ); + Weights[k] = 0; + for ( v = 0; v < 16; v++ ) + if ( uSuppFanin & (1 << v) ) + Weights[k] += pFreqs[v] - 1; + } + // find the most frequent fanin + WeightMax = 0; + FaninMax = -1; + for ( k = 0; k < pObj->nFans; k++ ) + if ( WeightMax < Weights[k] ) + { + WeightMax = Weights[k]; + FaninMax = k; + } + // no need to reorder if there are no frequent fanins + if ( FaninMax == -1 ) + continue; + // move the fanins number k to the first place + nSwaps = 0; + pIn = Kit_DsdObjTruth(pObj); + pOut = p->pMem; +// for ( v = FaninMax; v < ((int)pObj->nFans)-1; v++ ) + for ( v = FaninMax-1; v >= 0; v-- ) + { + // swap the fanins + Temp = pObj->pFans[v]; + pObj->pFans[v] = pObj->pFans[v+1]; + pObj->pFans[v+1] = Temp; + // swap the truth table variables + Kit_TruthSwapAdjacentVars( pOut, pIn, pObj->nFans, v ); + pTemp = pIn; pIn = pOut; pOut = pTemp; + nSwaps++; + } + if ( nSwaps & 1 ) + Kit_TruthCopy( pOut, pIn, pObj->nFans ); + } +} + +/**Function************************************************************* + + Synopsis [Compute the support.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_DsdGetSupports_rec( Kit_DsdNtk_t * p, int iLit ) +{ + Kit_DsdObj_t * pObj; + unsigned uSupport, k; + int iFaninLit; + pObj = Kit_DsdNtkObj( p, Kit_DsdLit2Var(iLit) ); + if ( pObj == NULL ) + return Kit_DsdLitSupport( p, iLit ); + uSupport = 0; + Kit_DsdObjForEachFanin( p, pObj, iFaninLit, k ) + uSupport |= Kit_DsdGetSupports_rec( p, iFaninLit ); + p->pSupps[pObj->Id - p->nVars] = uSupport; + assert( uSupport <= 0xFFFF ); + return uSupport; +} + +/**Function************************************************************* + + Synopsis [Compute the support.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_DsdGetSupports( Kit_DsdNtk_t * p ) +{ + Kit_DsdObj_t * pRoot; + unsigned uSupport; + assert( p->pSupps == NULL ); + p->pSupps = ALLOC( unsigned, p->nNodes ); + // consider simple special cases + pRoot = Kit_DsdNtkRoot(p); + if ( pRoot->Type == KIT_DSD_CONST1 ) + { + assert( p->nNodes == 1 ); + uSupport = p->pSupps[0] = 0; + } + if ( pRoot->Type == KIT_DSD_VAR ) + { + assert( p->nNodes == 1 ); + uSupport = p->pSupps[0] = Kit_DsdLitSupport( p, pRoot->pFans[0] ); + } + else + uSupport = Kit_DsdGetSupports_rec( p, p->Root ); + assert( uSupport <= 0xFFFF ); + return uSupport; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if there is a component with more than 3 inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdFindLargeBox_rec( Kit_DsdNtk_t * pNtk, int Id, int Size ) +{ + Kit_DsdObj_t * pObj; + unsigned iLit, i, RetValue; + pObj = Kit_DsdNtkObj( pNtk, Id ); + if ( pObj == NULL ) + return 0; + if ( pObj->Type == KIT_DSD_PRIME && (int)pObj->nFans > Size ) + return 1; + RetValue = 0; + Kit_DsdObjForEachFanin( pNtk, pObj, iLit, i ) + RetValue |= Kit_DsdFindLargeBox_rec( pNtk, Kit_DsdLit2Var(iLit), Size ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if there is a component with more than 3 inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdFindLargeBox( Kit_DsdNtk_t * pNtk, int Size ) +{ + return Kit_DsdFindLargeBox_rec( pNtk, Kit_DsdLit2Var(pNtk->Root), Size ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the non-DSD 4-var func is implementable with two 3-LUTs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdRootNodeHasCommonVars( Kit_DsdObj_t * pObj0, Kit_DsdObj_t * pObj1 ) +{ + unsigned i, k; + for ( i = 0; i < pObj0->nFans; i++ ) + { + if ( Kit_DsdLit2Var(pObj0->pFans[i]) >= 4 ) + continue; + for ( k = 0; k < pObj1->nFans; k++ ) + if ( Kit_DsdLit2Var(pObj0->pFans[i]) == Kit_DsdLit2Var(pObj1->pFans[k]) ) + return 1; + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the non-DSD 4-var func is implementable with two 3-LUTs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdCheckVar4Dec2( Kit_DsdNtk_t * pNtk0, Kit_DsdNtk_t * pNtk1 ) +{ + assert( pNtk0->nVars == 4 ); + assert( pNtk1->nVars == 4 ); + if ( Kit_DsdFindLargeBox(pNtk0, 2) ) + return 0; + if ( Kit_DsdFindLargeBox(pNtk1, 2) ) + return 0; + return Kit_DsdRootNodeHasCommonVars( Kit_DsdNtkRoot(pNtk0), Kit_DsdNtkRoot(pNtk1) ); +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdDecompose_rec( Kit_DsdNtk_t * pNtk, Kit_DsdObj_t * pObj, unsigned uSupp, unsigned char * pPar, int nDecMux ) +{ + Kit_DsdObj_t * pRes, * pRes0, * pRes1; + int nWords = Kit_TruthWordNum(pObj->nFans); + unsigned * pTruth = Kit_DsdObjTruth(pObj); + unsigned * pCofs2[2] = { pNtk->pMem, pNtk->pMem + nWords }; + unsigned * pCofs4[2][2] = { {pNtk->pMem + 2 * nWords, pNtk->pMem + 3 * nWords}, {pNtk->pMem + 4 * nWords, pNtk->pMem + 5 * nWords} }; + int i, iLit0, iLit1, nFans0, nFans1, nPairs; + int fEquals[2][2], fOppos, fPairs[4][4]; + unsigned j, k, nFansNew, uSupp0, uSupp1; + + assert( pObj->nFans > 0 ); + assert( pObj->Type == KIT_DSD_PRIME ); + assert( uSupp == (uSupp0 = (unsigned)Kit_TruthSupport(pTruth, pObj->nFans)) ); + + // compress the truth table + if ( uSupp != Kit_BitMask(pObj->nFans) ) + { + nFansNew = Kit_WordCountOnes(uSupp); + Kit_TruthShrink( pNtk->pMem, pTruth, nFansNew, pObj->nFans, uSupp, 1 ); + for ( j = k = 0; j < pObj->nFans; j++ ) + if ( uSupp & (1 << j) ) + pObj->pFans[k++] = pObj->pFans[j]; + assert( k == nFansNew ); + pObj->nFans = k; + uSupp = Kit_BitMask(pObj->nFans); + } + + // consider the single variable case + if ( pObj->nFans == 1 ) + { + pObj->Type = KIT_DSD_NONE; + if ( pTruth[0] == 0x55555555 ) + pObj->pFans[0] = Kit_DsdLitNot(pObj->pFans[0]); + else + assert( pTruth[0] == 0xAAAAAAAA ); + // update the parent pointer + *pPar = Kit_DsdLitNotCond( pObj->pFans[0], Kit_DsdLitIsCompl(*pPar) ); + return; + } + + // decompose the output + if ( !pObj->fMark ) + for ( i = pObj->nFans - 1; i >= 0; i-- ) + { + // get the two-variable cofactors + Kit_TruthCofactor0New( pCofs2[0], pTruth, pObj->nFans, i ); + Kit_TruthCofactor1New( pCofs2[1], pTruth, pObj->nFans, i ); +// assert( !Kit_TruthVarInSupport( pCofs2[0], pObj->nFans, i) ); +// assert( !Kit_TruthVarInSupport( pCofs2[1], pObj->nFans, i) ); + // get the constant cofs + fEquals[0][0] = Kit_TruthIsConst0( pCofs2[0], pObj->nFans ); + fEquals[0][1] = Kit_TruthIsConst0( pCofs2[1], pObj->nFans ); + fEquals[1][0] = Kit_TruthIsConst1( pCofs2[0], pObj->nFans ); + fEquals[1][1] = Kit_TruthIsConst1( pCofs2[1], pObj->nFans ); + fOppos = Kit_TruthIsOpposite( pCofs2[0], pCofs2[1], pObj->nFans ); + assert( !Kit_TruthIsEqual(pCofs2[0], pCofs2[1], pObj->nFans) ); + if ( fEquals[0][0] + fEquals[0][1] + fEquals[1][0] + fEquals[1][1] + fOppos == 0 ) + { + // check the MUX decomposition + uSupp0 = Kit_TruthSupport( pCofs2[0], pObj->nFans ); + uSupp1 = Kit_TruthSupport( pCofs2[1], pObj->nFans ); + assert( uSupp == (uSupp0 | uSupp1 | (1<<i)) ); + if ( uSupp0 & uSupp1 ) + continue; + // perform MUX decomposition + pRes0 = Kit_DsdObjAlloc( pNtk, KIT_DSD_PRIME, pObj->nFans ); + pRes1 = Kit_DsdObjAlloc( pNtk, KIT_DSD_PRIME, pObj->nFans ); + for ( k = 0; k < pObj->nFans; k++ ) + { + pRes0->pFans[k] = (uSupp0 & (1 << k))? pObj->pFans[k] : 127; + pRes1->pFans[k] = (uSupp1 & (1 << k))? pObj->pFans[k] : 127; + } + Kit_TruthCopy( Kit_DsdObjTruth(pRes0), pCofs2[0], pObj->nFans ); + Kit_TruthCopy( Kit_DsdObjTruth(pRes1), pCofs2[1], pObj->nFans ); + // update the current one + assert( pObj->Type == KIT_DSD_PRIME ); + pTruth[0] = 0xCACACACA; + pObj->nFans = 3; + pObj->pFans[2] = pObj->pFans[i]; + pObj->pFans[0] = 2*pRes0->Id; pRes0->nRefs++; + pObj->pFans[1] = 2*pRes1->Id; pRes1->nRefs++; + // call recursively + Kit_DsdDecompose_rec( pNtk, pRes0, uSupp0, pObj->pFans + 0, nDecMux ); + Kit_DsdDecompose_rec( pNtk, pRes1, uSupp1, pObj->pFans + 1, nDecMux ); + return; + } + + // create the new node + pRes = Kit_DsdObjAlloc( pNtk, KIT_DSD_AND, 2 ); + pRes->nRefs++; + pRes->nFans = 2; + pRes->pFans[0] = pObj->pFans[i]; pObj->pFans[i] = 127; uSupp &= ~(1 << i); + pRes->pFans[1] = 2*pObj->Id; + // update the parent pointer + *pPar = Kit_DsdLitNotCond( 2 * pRes->Id, Kit_DsdLitIsCompl(*pPar) ); + // consider different decompositions + if ( fEquals[0][0] ) + { + Kit_TruthCopy( pTruth, pCofs2[1], pObj->nFans ); + } + else if ( fEquals[0][1] ) + { + pRes->pFans[0] = Kit_DsdLitNot(pRes->pFans[0]); + Kit_TruthCopy( pTruth, pCofs2[0], pObj->nFans ); + } + else if ( fEquals[1][0] ) + { + *pPar = Kit_DsdLitNot(*pPar); + pRes->pFans[1] = Kit_DsdLitNot(pRes->pFans[1]); + Kit_TruthCopy( pTruth, pCofs2[1], pObj->nFans ); + } + else if ( fEquals[1][1] ) + { + *pPar = Kit_DsdLitNot(*pPar); + pRes->pFans[0] = Kit_DsdLitNot(pRes->pFans[0]); + pRes->pFans[1] = Kit_DsdLitNot(pRes->pFans[1]); + Kit_TruthCopy( pTruth, pCofs2[0], pObj->nFans ); + } + else if ( fOppos ) + { + pRes->Type = KIT_DSD_XOR; + Kit_TruthCopy( pTruth, pCofs2[0], pObj->nFans ); + } + else + assert( 0 ); + // decompose the remainder + assert( Kit_DsdObjTruth(pObj) == pTruth ); + Kit_DsdDecompose_rec( pNtk, pObj, uSupp, pRes->pFans + 1, nDecMux ); + return; + } + pObj->fMark = 1; + + // decompose the input + for ( i = pObj->nFans - 1; i >= 0; i-- ) + { + assert( Kit_TruthVarInSupport( pTruth, pObj->nFans, i ) ); + // get the single variale cofactors + Kit_TruthCofactor0New( pCofs2[0], pTruth, pObj->nFans, i ); + Kit_TruthCofactor1New( pCofs2[1], pTruth, pObj->nFans, i ); + // check the existence of MUX decomposition + uSupp0 = Kit_TruthSupport( pCofs2[0], pObj->nFans ); + uSupp1 = Kit_TruthSupport( pCofs2[1], pObj->nFans ); + assert( uSupp == (uSupp0 | uSupp1 | (1<<i)) ); + // if one of the cofs is a constant, it is time to check the output again + if ( uSupp0 == 0 || uSupp1 == 0 ) + { + pObj->fMark = 0; + Kit_DsdDecompose_rec( pNtk, pObj, uSupp, pPar, nDecMux ); + return; + } + assert( uSupp0 && uSupp1 ); + // get the number of unique variables + nFans0 = Kit_WordCountOnes( uSupp0 & ~uSupp1 ); + nFans1 = Kit_WordCountOnes( uSupp1 & ~uSupp0 ); + if ( nFans0 == 1 && nFans1 == 1 ) + { + // get the cofactors w.r.t. the unique variables + iLit0 = Kit_WordFindFirstBit( uSupp0 & ~uSupp1 ); + iLit1 = Kit_WordFindFirstBit( uSupp1 & ~uSupp0 ); + // get four cofactors + Kit_TruthCofactor0New( pCofs4[0][0], pCofs2[0], pObj->nFans, iLit0 ); + Kit_TruthCofactor1New( pCofs4[0][1], pCofs2[0], pObj->nFans, iLit0 ); + Kit_TruthCofactor0New( pCofs4[1][0], pCofs2[1], pObj->nFans, iLit1 ); + Kit_TruthCofactor1New( pCofs4[1][1], pCofs2[1], pObj->nFans, iLit1 ); + // check existence conditions + fEquals[0][0] = Kit_TruthIsEqual( pCofs4[0][0], pCofs4[1][0], pObj->nFans ); + fEquals[0][1] = Kit_TruthIsEqual( pCofs4[0][1], pCofs4[1][1], pObj->nFans ); + fEquals[1][0] = Kit_TruthIsEqual( pCofs4[0][0], pCofs4[1][1], pObj->nFans ); + fEquals[1][1] = Kit_TruthIsEqual( pCofs4[0][1], pCofs4[1][0], pObj->nFans ); + if ( (fEquals[0][0] && fEquals[0][1]) || (fEquals[1][0] && fEquals[1][1]) ) + { + // construct the MUX + pRes = Kit_DsdObjAlloc( pNtk, KIT_DSD_PRIME, 3 ); + Kit_DsdObjTruth(pRes)[0] = 0xCACACACA; + pRes->nRefs++; + pRes->nFans = 3; + pRes->pFans[0] = pObj->pFans[iLit0]; pObj->pFans[iLit0] = 127; uSupp &= ~(1 << iLit0); + pRes->pFans[1] = pObj->pFans[iLit1]; pObj->pFans[iLit1] = 127; uSupp &= ~(1 << iLit1); + pRes->pFans[2] = pObj->pFans[i]; pObj->pFans[i] = 2 * pRes->Id; // remains in support + // update the node +// if ( fEquals[0][0] && fEquals[0][1] ) +// Kit_TruthMuxVar( pTruth, pCofs4[0][0], pCofs4[0][1], pObj->nFans, i ); +// else +// Kit_TruthMuxVar( pTruth, pCofs4[0][1], pCofs4[0][0], pObj->nFans, i ); + Kit_TruthMuxVar( pTruth, pCofs4[1][0], pCofs4[1][1], pObj->nFans, i ); + if ( fEquals[1][0] && fEquals[1][1] ) + pRes->pFans[0] = Kit_DsdLitNot(pRes->pFans[0]); + // decompose the remainder + Kit_DsdDecompose_rec( pNtk, pObj, uSupp, pPar, nDecMux ); + return; + } + } + + // try other inputs + for ( k = i+1; k < pObj->nFans; k++ ) + { + // get four cofactors ik + Kit_TruthCofactor0New( pCofs4[0][0], pCofs2[0], pObj->nFans, k ); // 00 + Kit_TruthCofactor1New( pCofs4[0][1], pCofs2[0], pObj->nFans, k ); // 01 + Kit_TruthCofactor0New( pCofs4[1][0], pCofs2[1], pObj->nFans, k ); // 10 + Kit_TruthCofactor1New( pCofs4[1][1], pCofs2[1], pObj->nFans, k ); // 11 + // compare equal pairs + fPairs[0][1] = fPairs[1][0] = Kit_TruthIsEqual( pCofs4[0][0], pCofs4[0][1], pObj->nFans ); + fPairs[0][2] = fPairs[2][0] = Kit_TruthIsEqual( pCofs4[0][0], pCofs4[1][0], pObj->nFans ); + fPairs[0][3] = fPairs[3][0] = Kit_TruthIsEqual( pCofs4[0][0], pCofs4[1][1], pObj->nFans ); + fPairs[1][2] = fPairs[2][1] = Kit_TruthIsEqual( pCofs4[0][1], pCofs4[1][0], pObj->nFans ); + fPairs[1][3] = fPairs[3][1] = Kit_TruthIsEqual( pCofs4[0][1], pCofs4[1][1], pObj->nFans ); + fPairs[2][3] = fPairs[3][2] = Kit_TruthIsEqual( pCofs4[1][0], pCofs4[1][1], pObj->nFans ); + nPairs = fPairs[0][1] + fPairs[0][2] + fPairs[0][3] + fPairs[1][2] + fPairs[1][3] + fPairs[2][3]; + if ( nPairs != 3 && nPairs != 2 ) + continue; + + // decomposition exists + pRes = Kit_DsdObjAlloc( pNtk, KIT_DSD_AND, 2 ); + pRes->nRefs++; + pRes->nFans = 2; + pRes->pFans[0] = pObj->pFans[k]; pObj->pFans[k] = 2 * pRes->Id; // remains in support + pRes->pFans[1] = pObj->pFans[i]; pObj->pFans[i] = 127; uSupp &= ~(1 << i); + if ( !fPairs[0][1] && !fPairs[0][2] && !fPairs[0][3] ) // 00 + { + pRes->pFans[0] = Kit_DsdLitNot(pRes->pFans[0]); + pRes->pFans[1] = Kit_DsdLitNot(pRes->pFans[1]); + Kit_TruthMuxVar( pTruth, pCofs4[1][1], pCofs4[0][0], pObj->nFans, k ); + } + else if ( !fPairs[1][0] && !fPairs[1][2] && !fPairs[1][3] ) // 01 + { + pRes->pFans[1] = Kit_DsdLitNot(pRes->pFans[1]); + Kit_TruthMuxVar( pTruth, pCofs4[0][0], pCofs4[0][1], pObj->nFans, k ); + } + else if ( !fPairs[2][0] && !fPairs[2][1] && !fPairs[2][3] ) // 10 + { + pRes->pFans[0] = Kit_DsdLitNot(pRes->pFans[0]); + Kit_TruthMuxVar( pTruth, pCofs4[0][0], pCofs4[1][0], pObj->nFans, k ); + } + else if ( !fPairs[3][0] && !fPairs[3][1] && !fPairs[3][2] ) // 11 + { +// unsigned uSupp0 = Kit_TruthSupport(pCofs4[0][0], pObj->nFans); +// unsigned uSupp1 = Kit_TruthSupport(pCofs4[1][1], pObj->nFans); +// unsigned uSupp; +// Extra_PrintBinary( stdout, &uSupp0, pObj->nFans ); printf( "\n" ); +// Extra_PrintBinary( stdout, &uSupp1, pObj->nFans ); printf( "\n" ); + Kit_TruthMuxVar( pTruth, pCofs4[0][0], pCofs4[1][1], pObj->nFans, k ); +// uSupp = Kit_TruthSupport(pTruth, pObj->nFans); +// Extra_PrintBinary( stdout, &uSupp, pObj->nFans ); printf( "\n" ); printf( "\n" ); + } + else + { + assert( fPairs[0][3] && fPairs[1][2] ); + pRes->Type = KIT_DSD_XOR;; + Kit_TruthMuxVar( pTruth, pCofs4[0][0], pCofs4[0][1], pObj->nFans, k ); + } + // decompose the remainder + Kit_DsdDecompose_rec( pNtk, pObj, uSupp, pPar, nDecMux ); + return; + } + } +/* + // if all decomposition methods failed and we are still above the limit, perform MUX-decomposition + if ( nDecMux > 0 && (int)pObj->nFans > nDecMux ) + { + int iBestVar = Kit_TruthBestCofVar( pTruth, pObj->nFans, pCofs2[0], pCofs2[1] ); + uSupp0 = Kit_TruthSupport( pCofs2[0], pObj->nFans ); + uSupp1 = Kit_TruthSupport( pCofs2[1], pObj->nFans ); + // perform MUX decomposition + pRes0 = Kit_DsdObjAlloc( pNtk, KIT_DSD_PRIME, pObj->nFans ); + pRes1 = Kit_DsdObjAlloc( pNtk, KIT_DSD_PRIME, pObj->nFans ); + for ( k = 0; k < pObj->nFans; k++ ) + pRes0->pFans[k] = pRes1->pFans[k] = pObj->pFans[k]; + Kit_TruthCopy( Kit_DsdObjTruth(pRes0), pCofs2[0], pObj->nFans ); + Kit_TruthCopy( Kit_DsdObjTruth(pRes1), pCofs2[1], pObj->nFans ); + // update the current one + assert( pObj->Type == KIT_DSD_PRIME ); + pTruth[0] = 0xCACACACA; + pObj->nFans = 3; + pObj->pFans[0] = 2*pRes0->Id; pRes0->nRefs++; + pObj->pFans[1] = 2*pRes1->Id; pRes1->nRefs++; + pObj->pFans[2] = pObj->pFans[iBestVar]; + // call recursively + Kit_DsdDecompose_rec( pNtk, pRes0, uSupp0, pObj->pFans + 0, nDecMux ); + Kit_DsdDecompose_rec( pNtk, pRes1, uSupp1, pObj->pFans + 1, nDecMux ); + } +*/ +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdDecomposeInt( unsigned * pTruth, int nVars, int nDecMux ) +{ + Kit_DsdNtk_t * pNtk; + Kit_DsdObj_t * pObj; + unsigned uSupp; + int i, nVarsReal; + assert( nVars <= 16 ); + pNtk = Kit_DsdNtkAlloc( nVars ); + pNtk->Root = Kit_DsdVar2Lit( pNtk->nVars, 0 ); + // create the first node + pObj = Kit_DsdObjAlloc( pNtk, KIT_DSD_PRIME, nVars ); + assert( pNtk->pNodes[0] == pObj ); + for ( i = 0; i < nVars; i++ ) + pObj->pFans[i] = Kit_DsdVar2Lit( i, 0 ); + Kit_TruthCopy( Kit_DsdObjTruth(pObj), pTruth, nVars ); + uSupp = Kit_TruthSupport( pTruth, nVars ); + // consider special cases + nVarsReal = Kit_WordCountOnes( uSupp ); + if ( nVarsReal == 0 ) + { + pObj->Type = KIT_DSD_CONST1; + pObj->nFans = 0; + if ( pTruth[0] == 0 ) + pNtk->Root = Kit_DsdLitNot(pNtk->Root); + return pNtk; + } + if ( nVarsReal == 1 ) + { + pObj->Type = KIT_DSD_VAR; + pObj->nFans = 1; + pObj->pFans[0] = Kit_DsdVar2Lit( Kit_WordFindFirstBit(uSupp), (pTruth[0] & 1) ); + return pNtk; + } + Kit_DsdDecompose_rec( pNtk, pNtk->pNodes[0], uSupp, &pNtk->Root, nDecMux ); + return pNtk; +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdDecompose( unsigned * pTruth, int nVars ) +{ + return Kit_DsdDecomposeInt( pTruth, nVars, 0 ); +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdDecomposeExpand( unsigned * pTruth, int nVars ) +{ + Kit_DsdNtk_t * pNtk, * pTemp; + pNtk = Kit_DsdDecomposeInt( pTruth, nVars, 0 ); + pNtk = Kit_DsdExpand( pTemp = pNtk ); + Kit_DsdNtkFree( pTemp ); + return pNtk; +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [Uses MUXes to break-down large prime nodes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_DsdNtk_t * Kit_DsdDecomposeMux( unsigned * pTruth, int nVars, int nDecMux ) +{ + return Kit_DsdDecomposeInt( pTruth, nVars, nDecMux ); +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdTestCofs( Kit_DsdNtk_t * pNtk, unsigned * pTruthInit ) +{ + Kit_DsdNtk_t * pNtk0, * pNtk1, * pTemp; +// Kit_DsdObj_t * pRoot; + unsigned * pCofs2[2] = { pNtk->pMem, pNtk->pMem + Kit_TruthWordNum(pNtk->nVars) }; + unsigned i, * pTruth; + int fVerbose = 1; + int RetValue = 0; + + pTruth = pTruthInit; +// pRoot = Kit_DsdNtkRoot(pNtk); +// pTruth = Kit_DsdObjTruth(pRoot); +// assert( pRoot->nFans == pNtk->nVars ); + + if ( fVerbose ) + { + printf( "Function: " ); +// Extra_PrintBinary( stdout, pTruth, (1 << pNtk->nVars) ); + Extra_PrintHexadecimal( stdout, pTruth, pNtk->nVars ); + printf( "\n" ); + Kit_DsdPrint( stdout, pNtk ); + } + for ( i = 0; i < pNtk->nVars; i++ ) + { + Kit_TruthCofactor0New( pCofs2[0], pTruth, pNtk->nVars, i ); + pNtk0 = Kit_DsdDecompose( pCofs2[0], pNtk->nVars ); + pNtk0 = Kit_DsdExpand( pTemp = pNtk0 ); + Kit_DsdNtkFree( pTemp ); + + if ( fVerbose ) + { + printf( "Cof%d0: ", i ); + Kit_DsdPrint( stdout, pNtk0 ); + } + + Kit_TruthCofactor1New( pCofs2[1], pTruth, pNtk->nVars, i ); + pNtk1 = Kit_DsdDecompose( pCofs2[1], pNtk->nVars ); + pNtk1 = Kit_DsdExpand( pTemp = pNtk1 ); + Kit_DsdNtkFree( pTemp ); + + if ( fVerbose ) + { + printf( "Cof%d1: ", i ); + Kit_DsdPrint( stdout, pNtk1 ); + } + +// if ( Kit_DsdCheckVar4Dec2( pNtk0, pNtk1 ) ) +// RetValue = 1; + + Kit_DsdNtkFree( pNtk0 ); + Kit_DsdNtkFree( pNtk1 ); + } + if ( fVerbose ) + printf( "\n" ); + + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdEval( unsigned * pTruth, int nVars, int nLutSize ) +{ + Kit_DsdMan_t * p; + Kit_DsdNtk_t * pNtk; + unsigned * pTruthC; + int Result; + + // decompose the function + pNtk = Kit_DsdDecompose( pTruth, nVars ); + Result = Kit_DsdCountLuts( pNtk, nLutSize ); +// printf( "\n" ); +// Kit_DsdPrint( stdout, pNtk ); +// printf( "Eval = %d.\n", Result ); + + // recompute the truth table + p = Kit_DsdManAlloc( nVars, Kit_DsdNtkObjNum(pNtk) ); + pTruthC = Kit_DsdTruthCompute( p, pNtk ); + if ( !Kit_TruthIsEqual( pTruth, pTruthC, nVars ) ) + printf( "Verification failed.\n" ); + Kit_DsdManFree( p ); + + Kit_DsdNtkFree( pNtk ); + return Result; +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdVerify( Kit_DsdNtk_t * pNtk, unsigned * pTruth, int nVars ) +{ + Kit_DsdMan_t * p; + unsigned * pTruthC; + p = Kit_DsdManAlloc( nVars, Kit_DsdNtkObjNum(pNtk)+2 ); + pTruthC = Kit_DsdTruthCompute( p, pNtk ); + if ( !Extra_TruthIsEqual( pTruth, pTruthC, nVars ) ) + printf( "Verification failed.\n" ); + Kit_DsdManFree( p ); +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdTest( unsigned * pTruth, int nVars ) +{ + Kit_DsdMan_t * p; + unsigned * pTruthC; + Kit_DsdNtk_t * pNtk, * pTemp; + pNtk = Kit_DsdDecompose( pTruth, nVars ); + +// if ( Kit_DsdFindLargeBox(pNtk, Kit_DsdLit2Var(pNtk->Root)) ) +// Kit_DsdPrint( stdout, pNtk ); + +// if ( Kit_DsdNtkRoot(pNtk)->nFans == (unsigned)nVars && nVars == 6 ) + + printf( "\n" ); + Kit_DsdPrint( stdout, pNtk ); + + pNtk = Kit_DsdExpand( pTemp = pNtk ); + Kit_DsdNtkFree( pTemp ); + + Kit_DsdPrint( stdout, pNtk ); + +// if ( Kit_DsdFindLargeBox(pNtk, Kit_DsdLit2Var(pNtk->Root)) ) +// Kit_DsdTestCofs( pNtk, pTruth ); + + // recompute the truth table + p = Kit_DsdManAlloc( nVars, Kit_DsdNtkObjNum(pNtk) ); + pTruthC = Kit_DsdTruthCompute( p, pNtk ); +// Extra_PrintBinary( stdout, pTruth, 1 << nVars ); printf( "\n" ); +// Extra_PrintBinary( stdout, pTruthC, 1 << nVars ); printf( "\n" ); + if ( Extra_TruthIsEqual( pTruth, pTruthC, nVars ) ) + { +// printf( "Verification is okay.\n" ); + } + else + printf( "Verification failed.\n" ); + Kit_DsdManFree( p ); + + + Kit_DsdNtkFree( pNtk ); +} + +/**Function************************************************************* + + Synopsis [Performs decomposition of the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrecompute4Vars() +{ + Kit_DsdMan_t * p; + Kit_DsdNtk_t * pNtk, * pTemp; + FILE * pFile; + unsigned uTruth; + unsigned * pTruthC; + char Buffer[256]; + int i, RetValue; + int Counter1 = 0, Counter2 = 0; + + pFile = fopen( "5npn/npn4.txt", "r" ); + for ( i = 0; fgets( Buffer, 100, pFile ); i++ ) + { + Buffer[6] = 0; + Extra_ReadHexadecimal( &uTruth, Buffer+2, 4 ); + uTruth = ((uTruth & 0xffff) << 16) | (uTruth & 0xffff); + pNtk = Kit_DsdDecompose( &uTruth, 4 ); + + pNtk = Kit_DsdExpand( pTemp = pNtk ); + Kit_DsdNtkFree( pTemp ); + + + if ( Kit_DsdFindLargeBox(pNtk, 3) ) + { +// RetValue = 0; + RetValue = Kit_DsdTestCofs( pNtk, &uTruth ); + printf( "\n" ); + printf( "%3d : Non-DSD function %s %s\n", i, Buffer + 2, RetValue? "implementable" : "" ); + Kit_DsdPrint( stdout, pNtk ); + + Counter1++; + Counter2 += RetValue; + } + +/* + printf( "%3d : Function %s ", i, Buffer + 2 ); + if ( !Kit_DsdFindLargeBox(pNtk, 3) ) + Kit_DsdPrint( stdout, pNtk ); + else + printf( "\n" ); +*/ + + p = Kit_DsdManAlloc( 4, Kit_DsdNtkObjNum(pNtk) ); + pTruthC = Kit_DsdTruthCompute( p, pNtk ); + if ( !Extra_TruthIsEqual( &uTruth, pTruthC, 4 ) ) + printf( "Verification failed.\n" ); + Kit_DsdManFree( p ); + + Kit_DsdNtkFree( pNtk ); + } + fclose( pFile ); + printf( "non-DSD = %d implementable = %d\n", Counter1, Counter2 ); +} + + +/**Function************************************************************* + + Synopsis [Returns the set of cofactoring variables.] + + Description [If there is no DSD components returns 0.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdCofactoringGetVars( Kit_DsdNtk_t ** ppNtk, int nSize, int * pVars ) +{ + Kit_DsdObj_t * pObj; + unsigned m; + int i, k, v, Var, nVars, iFaninLit; + // go through all the networks + nVars = 0; + for ( i = 0; i < nSize; i++ ) + { + // go through the prime objects of each networks + Kit_DsdNtkForEachObj( ppNtk[i], pObj, k ) + { + if ( pObj->Type != KIT_DSD_PRIME ) + continue; + if ( pObj->nFans == 3 ) + continue; + // collect direct fanin variables + Kit_DsdObjForEachFanin( ppNtk[i], pObj, iFaninLit, m ) + { + if ( !Kit_DsdLitIsLeaf(ppNtk[i], iFaninLit) ) + continue; + // add it to the array + Var = Kit_DsdLit2Var( iFaninLit ); + for ( v = 0; v < nVars; v++ ) + if ( pVars[v] == Var ) + break; + if ( v == nVars ) + pVars[nVars++] = Var; + } + } + } + return nVars; +} + +/**Function************************************************************* + + Synopsis [Canonical decomposition into completely DSD-structure.] + + Description [Returns the number of cofactoring steps. Also returns + the cofactoring variables in pVars.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_DsdCofactoring( unsigned * pTruth, int nVars, int * pCofVars, int nLimit, int fVerbose ) +{ + Kit_DsdNtk_t * ppNtks[5][16] = {0}, * pTemp; + unsigned * ppCofs[5][16]; + int pTryVars[16], nTryVars; + int nPrimeSizeMin, nPrimeSizeMax, nPrimeSizeCur; + int nSuppSizeMin, nSuppSizeMax, iVarBest; + int i, k, v, nStep, nSize, nMemSize; + assert( nLimit < 5 ); + + // allocate storage for cofactors + nMemSize = Kit_TruthWordNum(nVars); + ppCofs[0][0] = ALLOC( unsigned, 80 * nMemSize ); + nSize = 0; + for ( i = 0; i < 5; i++ ) + for ( k = 0; k < 16; k++ ) + ppCofs[i][k] = ppCofs[0][0] + nMemSize * nSize++; + assert( nSize == 80 ); + + // copy the function + Kit_TruthCopy( ppCofs[0][0], pTruth, nVars ); + ppNtks[0][0] = Kit_DsdDecompose( ppCofs[0][0], nVars ); + + if ( fVerbose ) + printf( "\nProcessing prime function with %d support variables:\n", nVars ); + + // perform recursive cofactoring + for ( nStep = 0; nStep < nLimit; nStep++ ) + { + nSize = (1 << nStep); + // find the variables to use in the cofactoring step + nTryVars = Kit_DsdCofactoringGetVars( ppNtks[nStep], nSize, pTryVars ); + if ( nTryVars == 0 ) + break; + // cofactor w.r.t. the above variables + iVarBest = -1; + nPrimeSizeMin = 10000; + nSuppSizeMin = 10000; + for ( v = 0; v < nTryVars; v++ ) + { + nPrimeSizeMax = 0; + nSuppSizeMax = 0; + for ( i = 0; i < nSize; i++ ) + { + // cofactor and decompose cofactors + Kit_TruthCofactor0New( ppCofs[nStep+1][2*i+0], ppCofs[nStep][i], nVars, pTryVars[v] ); + Kit_TruthCofactor1New( ppCofs[nStep+1][2*i+1], ppCofs[nStep][i], nVars, pTryVars[v] ); + ppNtks[nStep+1][2*i+0] = Kit_DsdDecompose( ppCofs[nStep+1][2*i+0], nVars ); + ppNtks[nStep+1][2*i+1] = Kit_DsdDecompose( ppCofs[nStep+1][2*i+1], nVars ); + // compute the largest non-decomp block + nPrimeSizeCur = Kit_DsdNonDsdSizeMax(ppNtks[nStep+1][2*i+0]); + nPrimeSizeMax = KIT_MAX( nPrimeSizeMax, nPrimeSizeCur ); + nPrimeSizeCur = Kit_DsdNonDsdSizeMax(ppNtks[nStep+1][2*i+1]); + nPrimeSizeMax = KIT_MAX( nPrimeSizeMax, nPrimeSizeCur ); + // compute the sum total of supports + nSuppSizeMax += Kit_TruthSupportSize( ppCofs[nStep+1][2*i+0], nVars ); + nSuppSizeMax += Kit_TruthSupportSize( ppCofs[nStep+1][2*i+1], nVars ); + // free the networks + Kit_DsdNtkFree( ppNtks[nStep+1][2*i+0] ); + Kit_DsdNtkFree( ppNtks[nStep+1][2*i+1] ); + } + // find the min max support size of the prime component + if ( nPrimeSizeMin > nPrimeSizeMax || (nPrimeSizeMin == nPrimeSizeMax && nSuppSizeMin > nSuppSizeMax) ) + { + nPrimeSizeMin = nPrimeSizeMax; + nSuppSizeMin = nSuppSizeMax; + iVarBest = pTryVars[v]; + } + } + assert( iVarBest != -1 ); + // save the variable + if ( pCofVars ) + pCofVars[nStep] = iVarBest; + // cofactor w.r.t. the best + for ( i = 0; i < nSize; i++ ) + { + Kit_TruthCofactor0New( ppCofs[nStep+1][2*i+0], ppCofs[nStep][i], nVars, iVarBest ); + Kit_TruthCofactor1New( ppCofs[nStep+1][2*i+1], ppCofs[nStep][i], nVars, iVarBest ); + ppNtks[nStep+1][2*i+0] = Kit_DsdDecompose( ppCofs[nStep+1][2*i+0], nVars ); + ppNtks[nStep+1][2*i+1] = Kit_DsdDecompose( ppCofs[nStep+1][2*i+1], nVars ); + if ( fVerbose ) + { + ppNtks[nStep+1][2*i+0] = Kit_DsdExpand( pTemp = ppNtks[nStep+1][2*i+0] ); + Kit_DsdNtkFree( pTemp ); + ppNtks[nStep+1][2*i+1] = Kit_DsdExpand( pTemp = ppNtks[nStep+1][2*i+1] ); + Kit_DsdNtkFree( pTemp ); + + printf( "Cof%d%d: ", nStep+1, 2*i+0 ); + Kit_DsdPrint( stdout, ppNtks[nStep+1][2*i+0] ); + printf( "Cof%d%d: ", nStep+1, 2*i+1 ); + Kit_DsdPrint( stdout, ppNtks[nStep+1][2*i+1] ); + } + } + } + + // free the networks + for ( i = 0; i < 5; i++ ) + for ( k = 0; k < 16; k++ ) + if ( ppNtks[i][k] ) + Kit_DsdNtkFree( ppNtks[i][k] ); + free( ppCofs[0][0] ); + + assert( nStep <= nLimit ); + return nStep; +} + +/**Function************************************************************* + + Synopsis [Canonical decomposition into completely DSD-structure.] + + Description [Returns the number of cofactoring steps. Also returns + the cofactoring variables in pVars.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_DsdPrintCofactors( unsigned * pTruth, int nVars, int nCofLevel, int fVerbose ) +{ + Kit_DsdNtk_t * ppNtks[32] = {0}, * pTemp; + unsigned * ppCofs[5][16]; + int piCofVar[5]; + int nPrimeSizeMax, nPrimeSizeCur, nSuppSizeMax; + int i, k, v1, v2, v3, v4, s, nSteps, nSize, nMemSize; + assert( nCofLevel < 5 ); + + // print the function + ppNtks[0] = Kit_DsdDecompose( pTruth, nVars ); + ppNtks[0] = Kit_DsdExpand( pTemp = ppNtks[0] ); + Kit_DsdNtkFree( pTemp ); + if ( fVerbose ) + Kit_DsdPrint( stdout, ppNtks[0] ); + Kit_DsdNtkFree( ppNtks[0] ); + + // allocate storage for cofactors + nMemSize = Kit_TruthWordNum(nVars); + ppCofs[0][0] = ALLOC( unsigned, 80 * nMemSize ); + nSize = 0; + for ( i = 0; i < 5; i++ ) + for ( k = 0; k < 16; k++ ) + ppCofs[i][k] = ppCofs[0][0] + nMemSize * nSize++; + assert( nSize == 80 ); + + // copy the function + Kit_TruthCopy( ppCofs[0][0], pTruth, nVars ); + + if ( nCofLevel == 1 ) + for ( v1 = 0; v1 < nVars; v1++ ) + { + nSteps = 0; + piCofVar[nSteps++] = v1; + + printf( " Variables { " ); + for ( i = 0; i < nSteps; i++ ) + printf( "%c ", 'a' + piCofVar[i] ); + printf( "}\n" ); + + // single cofactors + for ( s = 1; s <= nSteps; s++ ) + { + for ( k = 0; k < s; k++ ) + { + nSize = (1 << k); + for ( i = 0; i < nSize; i++ ) + { + Kit_TruthCofactor0New( ppCofs[k+1][2*i+0], ppCofs[k][i], nVars, piCofVar[k] ); + Kit_TruthCofactor1New( ppCofs[k+1][2*i+1], ppCofs[k][i], nVars, piCofVar[k] ); + } + } + } + // compute DSD networks + nSize = (1 << nSteps); + nPrimeSizeMax = 0; + nSuppSizeMax = 0; + for ( i = 0; i < nSize; i++ ) + { + ppNtks[i] = Kit_DsdDecompose( ppCofs[nSteps][i], nVars ); + ppNtks[i] = Kit_DsdExpand( pTemp = ppNtks[i] ); + Kit_DsdNtkFree( pTemp ); + if ( fVerbose ) + { + printf( "Cof%d%d: ", nSteps, i ); + Kit_DsdPrint( stdout, ppNtks[i] ); + } + // compute the largest non-decomp block + nPrimeSizeCur = Kit_DsdNonDsdSizeMax(ppNtks[i]); + nPrimeSizeMax = KIT_MAX( nPrimeSizeMax, nPrimeSizeCur ); + Kit_DsdNtkFree( ppNtks[i] ); + nSuppSizeMax += Kit_TruthSupportSize( ppCofs[nSteps][i], nVars ); + } + printf( "Max = %2d. Supps = %2d.\n", nPrimeSizeMax, nSuppSizeMax ); + } + + if ( nCofLevel == 2 ) + for ( v1 = 0; v1 < nVars; v1++ ) + for ( v2 = v1+1; v2 < nVars; v2++ ) + { + nSteps = 0; + piCofVar[nSteps++] = v1; + piCofVar[nSteps++] = v2; + + printf( " Variables { " ); + for ( i = 0; i < nSteps; i++ ) + printf( "%c ", 'a' + piCofVar[i] ); + printf( "}\n" ); + + // single cofactors + for ( s = 1; s <= nSteps; s++ ) + { + for ( k = 0; k < s; k++ ) + { + nSize = (1 << k); + for ( i = 0; i < nSize; i++ ) + { + Kit_TruthCofactor0New( ppCofs[k+1][2*i+0], ppCofs[k][i], nVars, piCofVar[k] ); + Kit_TruthCofactor1New( ppCofs[k+1][2*i+1], ppCofs[k][i], nVars, piCofVar[k] ); + } + } + } + // compute DSD networks + nSize = (1 << nSteps); + nPrimeSizeMax = 0; + nSuppSizeMax = 0; + for ( i = 0; i < nSize; i++ ) + { + ppNtks[i] = Kit_DsdDecompose( ppCofs[nSteps][i], nVars ); + ppNtks[i] = Kit_DsdExpand( pTemp = ppNtks[i] ); + Kit_DsdNtkFree( pTemp ); + if ( fVerbose ) + { + printf( "Cof%d%d: ", nSteps, i ); + Kit_DsdPrint( stdout, ppNtks[i] ); + } + // compute the largest non-decomp block + nPrimeSizeCur = Kit_DsdNonDsdSizeMax(ppNtks[i]); + nPrimeSizeMax = KIT_MAX( nPrimeSizeMax, nPrimeSizeCur ); + Kit_DsdNtkFree( ppNtks[i] ); + nSuppSizeMax += Kit_TruthSupportSize( ppCofs[nSteps][i], nVars ); + } + printf( "Max = %2d. Supps = %2d.\n", nPrimeSizeMax, nSuppSizeMax ); + } + + if ( nCofLevel == 3 ) + for ( v1 = 0; v1 < nVars; v1++ ) + for ( v2 = v1+1; v2 < nVars; v2++ ) + for ( v3 = v2+1; v3 < nVars; v3++ ) + { + nSteps = 0; + piCofVar[nSteps++] = v1; + piCofVar[nSteps++] = v2; + piCofVar[nSteps++] = v3; + + printf( " Variables { " ); + for ( i = 0; i < nSteps; i++ ) + printf( "%c ", 'a' + piCofVar[i] ); + printf( "}\n" ); + + // single cofactors + for ( s = 1; s <= nSteps; s++ ) + { + for ( k = 0; k < s; k++ ) + { + nSize = (1 << k); + for ( i = 0; i < nSize; i++ ) + { + Kit_TruthCofactor0New( ppCofs[k+1][2*i+0], ppCofs[k][i], nVars, piCofVar[k] ); + Kit_TruthCofactor1New( ppCofs[k+1][2*i+1], ppCofs[k][i], nVars, piCofVar[k] ); + } + } + } + // compute DSD networks + nSize = (1 << nSteps); + nPrimeSizeMax = 0; + nSuppSizeMax = 0; + for ( i = 0; i < nSize; i++ ) + { + ppNtks[i] = Kit_DsdDecompose( ppCofs[nSteps][i], nVars ); + ppNtks[i] = Kit_DsdExpand( pTemp = ppNtks[i] ); + Kit_DsdNtkFree( pTemp ); + if ( fVerbose ) + { + printf( "Cof%d%d: ", nSteps, i ); + Kit_DsdPrint( stdout, ppNtks[i] ); + } + // compute the largest non-decomp block + nPrimeSizeCur = Kit_DsdNonDsdSizeMax(ppNtks[i]); + nPrimeSizeMax = KIT_MAX( nPrimeSizeMax, nPrimeSizeCur ); + Kit_DsdNtkFree( ppNtks[i] ); + nSuppSizeMax += Kit_TruthSupportSize( ppCofs[nSteps][i], nVars ); + } + printf( "Max = %2d. Supps = %2d.\n", nPrimeSizeMax, nSuppSizeMax ); + } + + if ( nCofLevel == 4 ) + for ( v1 = 0; v1 < nVars; v1++ ) + for ( v2 = v1+1; v2 < nVars; v2++ ) + for ( v3 = v2+1; v3 < nVars; v3++ ) + for ( v4 = v3+1; v4 < nVars; v4++ ) + { + nSteps = 0; + piCofVar[nSteps++] = v1; + piCofVar[nSteps++] = v2; + piCofVar[nSteps++] = v3; + piCofVar[nSteps++] = v4; + + printf( " Variables { " ); + for ( i = 0; i < nSteps; i++ ) + printf( "%c ", 'a' + piCofVar[i] ); + printf( "}\n" ); + + // single cofactors + for ( s = 1; s <= nSteps; s++ ) + { + for ( k = 0; k < s; k++ ) + { + nSize = (1 << k); + for ( i = 0; i < nSize; i++ ) + { + Kit_TruthCofactor0New( ppCofs[k+1][2*i+0], ppCofs[k][i], nVars, piCofVar[k] ); + Kit_TruthCofactor1New( ppCofs[k+1][2*i+1], ppCofs[k][i], nVars, piCofVar[k] ); + } + } + } + // compute DSD networks + nSize = (1 << nSteps); + nPrimeSizeMax = 0; + nSuppSizeMax = 0; + for ( i = 0; i < nSize; i++ ) + { + ppNtks[i] = Kit_DsdDecompose( ppCofs[nSteps][i], nVars ); + ppNtks[i] = Kit_DsdExpand( pTemp = ppNtks[i] ); + Kit_DsdNtkFree( pTemp ); + if ( fVerbose ) + { + printf( "Cof%d%d: ", nSteps, i ); + Kit_DsdPrint( stdout, ppNtks[i] ); + } + // compute the largest non-decomp block + nPrimeSizeCur = Kit_DsdNonDsdSizeMax(ppNtks[i]); + nPrimeSizeMax = KIT_MAX( nPrimeSizeMax, nPrimeSizeCur ); + Kit_DsdNtkFree( ppNtks[i] ); + nSuppSizeMax += Kit_TruthSupportSize( ppCofs[nSteps][i], nVars ); + } + printf( "Max = %2d. Supps = %2d.\n", nPrimeSizeMax, nSuppSizeMax ); + } + + + free( ppCofs[0][0] ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitFactor.c b/src/aig/kit/kitFactor.c new file mode 100644 index 00000000..e3288342 --- /dev/null +++ b/src/aig/kit/kitFactor.c @@ -0,0 +1,339 @@ +/**CFile**************************************************************** + + FileName [kitFactor.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Algebraic factoring.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitFactor.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// factoring fails if intermediate memory usage exceed this limit +#define KIT_FACTOR_MEM_LIMIT (1<<16) + +static Kit_Edge_t Kit_SopFactor_rec( Kit_Graph_t * pFForm, Kit_Sop_t * cSop, int nLits, Vec_Int_t * vMemory ); +static Kit_Edge_t Kit_SopFactorLF_rec( Kit_Graph_t * pFForm, Kit_Sop_t * cSop, Kit_Sop_t * cSimple, int nLits, Vec_Int_t * vMemory ); +static Kit_Edge_t Kit_SopFactorTrivial( Kit_Graph_t * pFForm, Kit_Sop_t * cSop, int nLits ); +static Kit_Edge_t Kit_SopFactorTrivialCube( Kit_Graph_t * pFForm, unsigned uCube, int nLits ); + +extern int Kit_SopFactorVerify( Vec_Int_t * cSop, Kit_Graph_t * pFForm, int nVars ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Factors the cover.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Graph_t * Kit_SopFactor( Vec_Int_t * vCover, int fCompl, int nVars, Vec_Int_t * vMemory ) +{ + Kit_Sop_t Sop, * cSop = &Sop; + Kit_Graph_t * pFForm; + Kit_Edge_t eRoot; +// int nCubes; + + // works for up to 15 variables because divisin procedure + // used the last bit for marking the cubes going to the remainder + assert( nVars < 16 ); + + // check for trivial functions + if ( Vec_IntSize(vCover) == 0 ) + return Kit_GraphCreateConst0(); + if ( Vec_IntSize(vCover) == 1 && Vec_IntEntry(vCover, 0) == 0 ) + return Kit_GraphCreateConst1(); + + // prepare memory manager +// Vec_IntClear( vMemory ); + Vec_IntGrow( vMemory, KIT_FACTOR_MEM_LIMIT ); + + // perform CST + Kit_SopCreateInverse( cSop, vCover, 2 * nVars, vMemory ); // CST + + // start the factored form + pFForm = Kit_GraphCreate( nVars ); + // factor the cover + eRoot = Kit_SopFactor_rec( pFForm, cSop, 2 * nVars, vMemory ); + // finalize the factored form + Kit_GraphSetRoot( pFForm, eRoot ); + if ( fCompl ) + Kit_GraphComplement( pFForm ); + + // verify the factored form +// nCubes = Vec_IntSize(vCover); +// Vec_IntShrink( vCover, nCubes ); +// if ( !Kit_SopFactorVerify( vCover, pFForm, nVars ) ) +// printf( "Verification has failed.\n" ); + return pFForm; +} + +/**Function************************************************************* + + Synopsis [Recursive factoring procedure.] + + Description [For the pseudo-code, see Hachtel/Somenzi, + Logic synthesis and verification algorithms, Kluwer, 1996, p. 432.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_SopFactor_rec( Kit_Graph_t * pFForm, Kit_Sop_t * cSop, int nLits, Vec_Int_t * vMemory ) +{ + Kit_Sop_t Div, Quo, Rem, Com; + Kit_Sop_t * cDiv = &Div, * cQuo = &Quo, * cRem = &Rem, * cCom = &Com; + Kit_Edge_t eNodeDiv, eNodeQuo, eNodeRem, eNodeAnd; + + // make sure the cover contains some cubes + assert( Kit_SopCubeNum(cSop) > 0 ); + + // get the divisor + if ( !Kit_SopDivisor(cDiv, cSop, nLits, vMemory) ) + return Kit_SopFactorTrivial( pFForm, cSop, nLits ); + + // divide the cover by the divisor + Kit_SopDivideInternal( cSop, cDiv, cQuo, cRem, vMemory ); + + // check the trivial case + assert( Kit_SopCubeNum(cQuo) > 0 ); + if ( Kit_SopCubeNum(cQuo) == 1 ) + return Kit_SopFactorLF_rec( pFForm, cSop, cQuo, nLits, vMemory ); + + // make the quotient cube free + Kit_SopMakeCubeFree( cQuo ); + + // divide the cover by the quotient + Kit_SopDivideInternal( cSop, cQuo, cDiv, cRem, vMemory ); + + // check the trivial case + if ( Kit_SopIsCubeFree( cDiv ) ) + { + eNodeDiv = Kit_SopFactor_rec( pFForm, cDiv, nLits, vMemory ); + eNodeQuo = Kit_SopFactor_rec( pFForm, cQuo, nLits, vMemory ); + eNodeAnd = Kit_GraphAddNodeAnd( pFForm, eNodeDiv, eNodeQuo ); + if ( Kit_SopCubeNum(cRem) == 0 ) + return eNodeAnd; + eNodeRem = Kit_SopFactor_rec( pFForm, cRem, nLits, vMemory ); + return Kit_GraphAddNodeOr( pFForm, eNodeAnd, eNodeRem ); + } + + // get the common cube + Kit_SopCommonCubeCover( cCom, cDiv, vMemory ); + + // solve the simple problem + return Kit_SopFactorLF_rec( pFForm, cSop, cCom, nLits, vMemory ); +} + + +/**Function************************************************************* + + Synopsis [Internal recursive factoring procedure for the leaf case.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_SopFactorLF_rec( Kit_Graph_t * pFForm, Kit_Sop_t * cSop, Kit_Sop_t * cSimple, int nLits, Vec_Int_t * vMemory ) +{ + Kit_Sop_t Div, Quo, Rem; + Kit_Sop_t * cDiv = &Div, * cQuo = &Quo, * cRem = &Rem; + Kit_Edge_t eNodeDiv, eNodeQuo, eNodeRem, eNodeAnd; + assert( Kit_SopCubeNum(cSimple) == 1 ); + // get the most often occurring literal + Kit_SopBestLiteralCover( cDiv, cSop, Kit_SopCube(cSimple, 0), nLits, vMemory ); + // divide the cover by the literal + Kit_SopDivideByCube( cSop, cDiv, cQuo, cRem, vMemory ); + // get the node pointer for the literal + eNodeDiv = Kit_SopFactorTrivialCube( pFForm, Kit_SopCube(cDiv, 0), nLits ); + // factor the quotient and remainder + eNodeQuo = Kit_SopFactor_rec( pFForm, cQuo, nLits, vMemory ); + eNodeAnd = Kit_GraphAddNodeAnd( pFForm, eNodeDiv, eNodeQuo ); + if ( Kit_SopCubeNum(cRem) == 0 ) + return eNodeAnd; + eNodeRem = Kit_SopFactor_rec( pFForm, cRem, nLits, vMemory ); + return Kit_GraphAddNodeOr( pFForm, eNodeAnd, eNodeRem ); +} + + +/**Function************************************************************* + + Synopsis [Factoring cube.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_SopFactorTrivialCube_rec( Kit_Graph_t * pFForm, unsigned uCube, int nStart, int nFinish ) +{ + Kit_Edge_t eNode1, eNode2; + int i, iLit = -1, nLits, nLits1, nLits2; + assert( uCube ); + // count the number of literals in this interval + nLits = 0; + for ( i = nStart; i < nFinish; i++ ) + if ( Kit_CubeHasLit(uCube, i) ) + { + iLit = i; + nLits++; + } + assert( iLit != -1 ); + // quit if there is only one literal + if ( nLits == 1 ) + return Kit_EdgeCreate( iLit/2, iLit%2 ); // CST + // split the literals into two parts + nLits1 = nLits/2; + nLits2 = nLits - nLits1; +// nLits2 = nLits/2; +// nLits1 = nLits - nLits2; + // find the splitting point + nLits = 0; + for ( i = nStart; i < nFinish; i++ ) + if ( Kit_CubeHasLit(uCube, i) ) + { + if ( nLits == nLits1 ) + break; + nLits++; + } + // recursively construct the tree for the parts + eNode1 = Kit_SopFactorTrivialCube_rec( pFForm, uCube, nStart, i ); + eNode2 = Kit_SopFactorTrivialCube_rec( pFForm, uCube, i, nFinish ); + return Kit_GraphAddNodeAnd( pFForm, eNode1, eNode2 ); +} + +/**Function************************************************************* + + Synopsis [Factoring cube.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_SopFactorTrivialCube( Kit_Graph_t * pFForm, unsigned uCube, int nLits ) +{ + return Kit_SopFactorTrivialCube_rec( pFForm, uCube, 0, nLits ); +} + +/**Function************************************************************* + + Synopsis [Factoring SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_SopFactorTrivial_rec( Kit_Graph_t * pFForm, unsigned * pCubes, int nCubes, int nLits ) +{ + Kit_Edge_t eNode1, eNode2; + int nCubes1, nCubes2; + if ( nCubes == 1 ) + return Kit_SopFactorTrivialCube_rec( pFForm, pCubes[0], 0, nLits ); + // split the cubes into two parts + nCubes1 = nCubes/2; + nCubes2 = nCubes - nCubes1; +// nCubes2 = nCubes/2; +// nCubes1 = nCubes - nCubes2; + // recursively construct the tree for the parts + eNode1 = Kit_SopFactorTrivial_rec( pFForm, pCubes, nCubes1, nLits ); + eNode2 = Kit_SopFactorTrivial_rec( pFForm, pCubes + nCubes1, nCubes2, nLits ); + return Kit_GraphAddNodeOr( pFForm, eNode1, eNode2 ); +} + +/**Function************************************************************* + + Synopsis [Factoring the cover, which has no algebraic divisors.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_SopFactorTrivial( Kit_Graph_t * pFForm, Kit_Sop_t * cSop, int nLits ) +{ + return Kit_SopFactorTrivial_rec( pFForm, cSop->pCubes, cSop->nCubes, nLits ); +} + + +/**Function************************************************************* + + Synopsis [Testing procedure for the factoring code.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_FactorTest( unsigned * pTruth, int nVars ) +{ + Vec_Int_t * vCover, * vMemory; + Kit_Graph_t * pGraph; +// unsigned uTruthRes; + int RetValue; + + // derive SOP + vCover = Vec_IntAlloc( 0 ); + RetValue = Kit_TruthIsop( pTruth, nVars, vCover, 0 ); + assert( RetValue == 0 ); + + // derive factored form + vMemory = Vec_IntAlloc( 0 ); + pGraph = Kit_SopFactor( vCover, 0, nVars, vMemory ); +/* + // derive truth table + assert( nVars <= 5 ); + uTruthRes = Kit_GraphToTruth( pGraph ); + if ( uTruthRes != pTruth[0] ) + printf( "Verification failed!" ); +*/ + printf( "Vars = %2d. Cubes = %3d. FFNodes = %3d. FF_memory = %3d.\n", + nVars, Vec_IntSize(vCover), Kit_GraphNodeNum(pGraph), Vec_IntSize(vMemory) ); + + Vec_IntFree( vMemory ); + Vec_IntFree( vCover ); + Kit_GraphFree( pGraph ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitGraph.c b/src/aig/kit/kitGraph.c new file mode 100644 index 00000000..80dcbdc0 --- /dev/null +++ b/src/aig/kit/kitGraph.c @@ -0,0 +1,397 @@ +/**CFile**************************************************************** + + FileName [kitGraph.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Decomposition graph representation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitGraph.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Creates a graph with the given number of leaves.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Graph_t * Kit_GraphCreate( int nLeaves ) +{ + Kit_Graph_t * pGraph; + pGraph = ALLOC( Kit_Graph_t, 1 ); + memset( pGraph, 0, sizeof(Kit_Graph_t) ); + pGraph->nLeaves = nLeaves; + pGraph->nSize = nLeaves; + pGraph->nCap = 2 * nLeaves + 50; + pGraph->pNodes = ALLOC( Kit_Node_t, pGraph->nCap ); + memset( pGraph->pNodes, 0, sizeof(Kit_Node_t) * pGraph->nSize ); + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates constant 0 graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Graph_t * Kit_GraphCreateConst0() +{ + Kit_Graph_t * pGraph; + pGraph = ALLOC( Kit_Graph_t, 1 ); + memset( pGraph, 0, sizeof(Kit_Graph_t) ); + pGraph->fConst = 1; + pGraph->eRoot.fCompl = 1; + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates constant 1 graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Graph_t * Kit_GraphCreateConst1() +{ + Kit_Graph_t * pGraph; + pGraph = ALLOC( Kit_Graph_t, 1 ); + memset( pGraph, 0, sizeof(Kit_Graph_t) ); + pGraph->fConst = 1; + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates the literal graph.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Graph_t * Kit_GraphCreateLeaf( int iLeaf, int nLeaves, int fCompl ) +{ + Kit_Graph_t * pGraph; + assert( 0 <= iLeaf && iLeaf < nLeaves ); + pGraph = Kit_GraphCreate( nLeaves ); + pGraph->eRoot.Node = iLeaf; + pGraph->eRoot.fCompl = fCompl; + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Creates a graph with the given number of leaves.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_GraphFree( Kit_Graph_t * pGraph ) +{ + FREE( pGraph->pNodes ); + free( pGraph ); +} + +/**Function************************************************************* + + Synopsis [Appends a new node to the graph.] + + Description [This procedure is meant for internal use.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Node_t * Kit_GraphAppendNode( Kit_Graph_t * pGraph ) +{ + Kit_Node_t * pNode; + if ( pGraph->nSize == pGraph->nCap ) + { + pGraph->pNodes = REALLOC( Kit_Node_t, pGraph->pNodes, 2 * pGraph->nCap ); + pGraph->nCap = 2 * pGraph->nCap; + } + pNode = pGraph->pNodes + pGraph->nSize++; + memset( pNode, 0, sizeof(Kit_Node_t) ); + return pNode; +} + +/**Function************************************************************* + + Synopsis [Creates an AND node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_GraphAddNodeAnd( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1 ) +{ + Kit_Node_t * pNode; + // get the new node + pNode = Kit_GraphAppendNode( pGraph ); + // set the inputs and other info + pNode->eEdge0 = eEdge0; + pNode->eEdge1 = eEdge1; + pNode->fCompl0 = eEdge0.fCompl; + pNode->fCompl1 = eEdge1.fCompl; + return Kit_EdgeCreate( pGraph->nSize - 1, 0 ); +} + +/**Function************************************************************* + + Synopsis [Creates an OR node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_GraphAddNodeOr( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1 ) +{ + Kit_Node_t * pNode; + // get the new node + pNode = Kit_GraphAppendNode( pGraph ); + // set the inputs and other info + pNode->eEdge0 = eEdge0; + pNode->eEdge1 = eEdge1; + pNode->fCompl0 = eEdge0.fCompl; + pNode->fCompl1 = eEdge1.fCompl; + // make adjustments for the OR gate + pNode->fNodeOr = 1; + pNode->eEdge0.fCompl = !pNode->eEdge0.fCompl; + pNode->eEdge1.fCompl = !pNode->eEdge1.fCompl; + return Kit_EdgeCreate( pGraph->nSize - 1, 1 ); +} + +/**Function************************************************************* + + Synopsis [Creates an XOR node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_GraphAddNodeXor( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1, int Type ) +{ + Kit_Edge_t eNode0, eNode1, eNode; + if ( Type == 0 ) + { + // derive the first AND + eEdge0.fCompl ^= 1; + eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + eEdge0.fCompl ^= 1; + // derive the second AND + eEdge1.fCompl ^= 1; + eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + // derive the final OR + eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + } + else + { + // derive the first AND + eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + // derive the second AND + eEdge0.fCompl ^= 1; + eEdge1.fCompl ^= 1; + eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 ); + // derive the final OR + eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + eNode.fCompl ^= 1; + } + return eNode; +} + +/**Function************************************************************* + + Synopsis [Creates an XOR node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Edge_t Kit_GraphAddNodeMux( Kit_Graph_t * pGraph, Kit_Edge_t eEdgeC, Kit_Edge_t eEdgeT, Kit_Edge_t eEdgeE, int Type ) +{ + Kit_Edge_t eNode0, eNode1, eNode; + if ( Type == 0 ) + { + // derive the first AND + eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeT ); + // derive the second AND + eEdgeC.fCompl ^= 1; + eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeE ); + // derive the final OR + eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + } + else + { + // complement the arguments + eEdgeT.fCompl ^= 1; + eEdgeE.fCompl ^= 1; + // derive the first AND + eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeT ); + // derive the second AND + eEdgeC.fCompl ^= 1; + eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeE ); + // derive the final OR + eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 ); + eNode.fCompl ^= 1; + } + return eNode; +} + +/**Function************************************************************* + + Synopsis [Derives the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_GraphToTruth( Kit_Graph_t * pGraph ) +{ + unsigned uTruths[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 }; + unsigned uTruth = 0, uTruth0, uTruth1; + Kit_Node_t * pNode; + int i; + + // sanity checks + assert( Kit_GraphLeaveNum(pGraph) >= 0 ); + assert( Kit_GraphLeaveNum(pGraph) <= pGraph->nSize ); + assert( Kit_GraphLeaveNum(pGraph) <= 5 ); + + // check for constant function + if ( Kit_GraphIsConst(pGraph) ) + return Kit_GraphIsComplement(pGraph)? 0 : ~((unsigned)0); + // check for a literal + if ( Kit_GraphIsVar(pGraph) ) + return Kit_GraphIsComplement(pGraph)? ~uTruths[Kit_GraphVarInt(pGraph)] : uTruths[Kit_GraphVarInt(pGraph)]; + + // assign the elementary variables + Kit_GraphForEachLeaf( pGraph, pNode, i ) + pNode->pFunc = (void *)(long)uTruths[i]; + + // compute the function for each internal node + Kit_GraphForEachNode( pGraph, pNode, i ) + { + uTruth0 = (unsigned)(long)Kit_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc; + uTruth1 = (unsigned)(long)Kit_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc; + uTruth0 = pNode->eEdge0.fCompl? ~uTruth0 : uTruth0; + uTruth1 = pNode->eEdge1.fCompl? ~uTruth1 : uTruth1; + uTruth = uTruth0 & uTruth1; + pNode->pFunc = (void *)(long)uTruth; + } + + // complement the result if necessary + return Kit_GraphIsComplement(pGraph)? ~uTruth : uTruth; +} + +/**Function************************************************************* + + Synopsis [Derives the factored form from the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Kit_Graph_t * Kit_TruthToGraph( unsigned * pTruth, int nVars, Vec_Int_t * vMemory ) +{ + Kit_Graph_t * pGraph; + int RetValue; + // derive SOP + RetValue = Kit_TruthIsop( pTruth, nVars, vMemory, 1 ); // tried 1 and found not useful in "renode" + if ( RetValue == -1 ) + return NULL; + if ( Vec_IntSize(vMemory) > 128 ) + return NULL; +// printf( "Isop size = %d.\n", Vec_IntSize(vMemory) ); + assert( RetValue == 0 || RetValue == 1 ); + // derive factored form + pGraph = Kit_SopFactor( vMemory, RetValue, nVars, vMemory ); + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Derives the maximum depth from the leaf to the root.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_GraphLeafDepth_rec( Kit_Graph_t * pGraph, Kit_Node_t * pNode, Kit_Node_t * pLeaf ) +{ + int Depth0, Depth1, Depth; + if ( pNode == pLeaf ) + return 0; + if ( Kit_GraphNodeIsVar(pGraph, pNode) ) + return -100; + Depth0 = Kit_GraphLeafDepth_rec( pGraph, Kit_GraphNodeFanin0(pGraph, pNode), pLeaf ); + Depth1 = Kit_GraphLeafDepth_rec( pGraph, Kit_GraphNodeFanin1(pGraph, pNode), pLeaf ); + Depth = KIT_MAX( Depth0, Depth1 ); + Depth = (Depth == -100) ? -100 : Depth + 1; + return Depth; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/kit/kitHop.c b/src/aig/kit/kitHop.c new file mode 100644 index 00000000..86ec5a88 --- /dev/null +++ b/src/aig/kit/kitHop.c @@ -0,0 +1,144 @@ +/**CFile**************************************************************** + + FileName [kitHop.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Procedures involving AIGs.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitHop.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" +#include "hop.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Transforms the decomposition graph into the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Kit_GraphToHopInternal( Hop_Man_t * pMan, Kit_Graph_t * pGraph ) +{ + Kit_Node_t * pNode = NULL; + Hop_Obj_t * pAnd0, * pAnd1; + int i; + // check for constant function + if ( Kit_GraphIsConst(pGraph) ) + return Hop_NotCond( Hop_ManConst1(pMan), Kit_GraphIsComplement(pGraph) ); + // check for a literal + if ( Kit_GraphIsVar(pGraph) ) + return Hop_NotCond( Kit_GraphVar(pGraph)->pFunc, Kit_GraphIsComplement(pGraph) ); + // build the AIG nodes corresponding to the AND gates of the graph + Kit_GraphForEachNode( pGraph, pNode, i ) + { + pAnd0 = Hop_NotCond( Kit_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl ); + pAnd1 = Hop_NotCond( Kit_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl ); + pNode->pFunc = Hop_And( pMan, pAnd0, pAnd1 ); + } + // complement the result if necessary + return Hop_NotCond( pNode->pFunc, Kit_GraphIsComplement(pGraph) ); +} + +/**Function************************************************************* + + Synopsis [Strashes one logic node using its SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Kit_GraphToHop( Hop_Man_t * pMan, Kit_Graph_t * pGraph ) +{ + Kit_Node_t * pNode = NULL; + int i; + // collect the fanins + Kit_GraphForEachLeaf( pGraph, pNode, i ) + pNode->pFunc = Hop_IthVar( pMan, i ); + // perform strashing + return Kit_GraphToHopInternal( pMan, pGraph ); +} + +/**Function************************************************************* + + Synopsis [Strashed onen logic nodes using its truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Kit_TruthToHop( Hop_Man_t * pMan, unsigned * pTruth, int nVars, Vec_Int_t * vMemory ) +{ + Hop_Obj_t * pObj; + Kit_Graph_t * pGraph; + // transform truth table into the decomposition tree + if ( vMemory == NULL ) + { + vMemory = Vec_IntAlloc( 0 ); + pGraph = Kit_TruthToGraph( pTruth, nVars, vMemory ); + Vec_IntFree( vMemory ); + } + else + pGraph = Kit_TruthToGraph( pTruth, nVars, vMemory ); + // derive the AIG for the decomposition tree + pObj = Kit_GraphToHop( pMan, pGraph ); + Kit_GraphFree( pGraph ); + return pObj; +} + +/**Function************************************************************* + + Synopsis [Strashes one logic node using its SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Hop_Obj_t * Kit_CoverToHop( Hop_Man_t * pMan, Vec_Int_t * vCover, int nVars, Vec_Int_t * vMemory ) +{ + Kit_Graph_t * pGraph; + Hop_Obj_t * pFunc; + // perform factoring + pGraph = Kit_SopFactor( vCover, 0, nVars, vMemory ); + // convert graph to the AIG + pFunc = Kit_GraphToHop( pMan, pGraph ); + Kit_GraphFree( pGraph ); + return pFunc; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitIsop.c b/src/aig/kit/kitIsop.c new file mode 100644 index 00000000..42fae2ea --- /dev/null +++ b/src/aig/kit/kitIsop.c @@ -0,0 +1,325 @@ +/**CFile**************************************************************** + + FileName [kitIsop.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [ISOP computation based on Morreale's algorithm.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitIsop.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// ISOP computation fails if intermediate memory usage exceed this limit +#define KIT_ISOP_MEM_LIMIT (1<<16) + +// static procedures to compute ISOP +static unsigned * Kit_TruthIsop_rec( unsigned * puOn, unsigned * puOnDc, int nVars, Kit_Sop_t * pcRes, Vec_Int_t * vStore ); +static unsigned Kit_TruthIsop5_rec( unsigned uOn, unsigned uOnDc, int nVars, Kit_Sop_t * pcRes, Vec_Int_t * vStore ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Computes ISOP from TT.] + + Description [Returns the cover in vMemory. Uses the rest of array in vMemory + as an intermediate memory storage. Returns the cover with -1 cubes, if the + the computation exceeded the memory limit (KIT_ISOP_MEM_LIMIT words of + intermediate data).] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthIsop( unsigned * puTruth, int nVars, Vec_Int_t * vMemory, int fTryBoth ) +{ + Kit_Sop_t cRes, * pcRes = &cRes; + Kit_Sop_t cRes2, * pcRes2 = &cRes2; + unsigned * pResult; + int RetValue = 0; + assert( nVars >= 0 && nVars < 16 ); + // if nVars < 5, make sure it does not depend on those vars +// for ( i = nVars; i < 5; i++ ) +// assert( !Kit_TruthVarInSupport(puTruth, 5, i) ); + // prepare memory manager + Vec_IntClear( vMemory ); + Vec_IntGrow( vMemory, KIT_ISOP_MEM_LIMIT ); + // compute ISOP for the direct polarity + pResult = Kit_TruthIsop_rec( puTruth, puTruth, nVars, pcRes, vMemory ); + if ( pcRes->nCubes == -1 ) + { + vMemory->nSize = -1; + return -1; + } + assert( Kit_TruthIsEqual( puTruth, pResult, nVars ) ); + if ( pcRes->nCubes == 0 || (pcRes->nCubes == 1 && pcRes->pCubes[0] == 0) ) + { + vMemory->pArray[0] = 0; + Vec_IntShrink( vMemory, pcRes->nCubes ); + return 0; + } + if ( fTryBoth ) + { + // compute ISOP for the complemented polarity + Kit_TruthNot( puTruth, puTruth, nVars ); + pResult = Kit_TruthIsop_rec( puTruth, puTruth, nVars, pcRes2, vMemory ); + if ( pcRes2->nCubes >= 0 ) + { + assert( Kit_TruthIsEqual( puTruth, pResult, nVars ) ); + if ( pcRes->nCubes > pcRes2->nCubes ) + { + RetValue = 1; + pcRes = pcRes2; + } + } + Kit_TruthNot( puTruth, puTruth, nVars ); + } +// printf( "%d ", vMemory->nSize ); + // move the cover representation to the beginning of the memory buffer + memmove( vMemory->pArray, pcRes->pCubes, pcRes->nCubes * sizeof(unsigned) ); + Vec_IntShrink( vMemory, pcRes->nCubes ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Computes ISOP 6 variables or more.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned * Kit_TruthIsop_rec( unsigned * puOn, unsigned * puOnDc, int nVars, Kit_Sop_t * pcRes, Vec_Int_t * vStore ) +{ + Kit_Sop_t cRes0, cRes1, cRes2; + Kit_Sop_t * pcRes0 = &cRes0, * pcRes1 = &cRes1, * pcRes2 = &cRes2; + unsigned * puRes0, * puRes1, * puRes2; + unsigned * puOn0, * puOn1, * puOnDc0, * puOnDc1, * pTemp, * pTemp0, * pTemp1; + int i, k, Var, nWords, nWordsAll; +// assert( Kit_TruthIsImply( puOn, puOnDc, nVars ) ); + // allocate room for the resulting truth table + nWordsAll = Kit_TruthWordNum( nVars ); + pTemp = Vec_IntFetch( vStore, nWordsAll ); + if ( pTemp == NULL ) + { + pcRes->nCubes = -1; + return NULL; + } + // check for constants + if ( Kit_TruthIsConst0( puOn, nVars ) ) + { + pcRes->nCubes = 0; + pcRes->pCubes = NULL; + Kit_TruthClear( pTemp, nVars ); + return pTemp; + } + if ( Kit_TruthIsConst1( puOnDc, nVars ) ) + { + pcRes->nCubes = 1; + pcRes->pCubes = Vec_IntFetch( vStore, 1 ); + if ( pcRes->pCubes == NULL ) + { + pcRes->nCubes = -1; + return NULL; + } + pcRes->pCubes[0] = 0; + Kit_TruthFill( pTemp, nVars ); + return pTemp; + } + assert( nVars > 0 ); + // find the topmost var + for ( Var = nVars-1; Var >= 0; Var-- ) + if ( Kit_TruthVarInSupport( puOn, nVars, Var ) || + Kit_TruthVarInSupport( puOnDc, nVars, Var ) ) + break; + assert( Var >= 0 ); + // consider a simple case when one-word computation can be used + if ( Var < 5 ) + { + unsigned uRes = Kit_TruthIsop5_rec( puOn[0], puOnDc[0], Var+1, pcRes, vStore ); + for ( i = 0; i < nWordsAll; i++ ) + pTemp[i] = uRes; + return pTemp; + } + assert( Var >= 5 ); + nWords = Kit_TruthWordNum( Var ); + // cofactor + puOn0 = puOn; puOn1 = puOn + nWords; + puOnDc0 = puOnDc; puOnDc1 = puOnDc + nWords; + pTemp0 = pTemp; pTemp1 = pTemp + nWords; + // solve for cofactors + Kit_TruthSharp( pTemp0, puOn0, puOnDc1, Var ); + puRes0 = Kit_TruthIsop_rec( pTemp0, puOnDc0, Var, pcRes0, vStore ); + if ( pcRes0->nCubes == -1 ) + { + pcRes->nCubes = -1; + return NULL; + } + Kit_TruthSharp( pTemp1, puOn1, puOnDc0, Var ); + puRes1 = Kit_TruthIsop_rec( pTemp1, puOnDc1, Var, pcRes1, vStore ); + if ( pcRes1->nCubes == -1 ) + { + pcRes->nCubes = -1; + return NULL; + } + Kit_TruthSharp( pTemp0, puOn0, puRes0, Var ); + Kit_TruthSharp( pTemp1, puOn1, puRes1, Var ); + Kit_TruthOr( pTemp0, pTemp0, pTemp1, Var ); + Kit_TruthAnd( pTemp1, puOnDc0, puOnDc1, Var ); + puRes2 = Kit_TruthIsop_rec( pTemp0, pTemp1, Var, pcRes2, vStore ); + if ( pcRes2->nCubes == -1 ) + { + pcRes->nCubes = -1; + return NULL; + } + // create the resulting cover + pcRes->nCubes = pcRes0->nCubes + pcRes1->nCubes + pcRes2->nCubes; + pcRes->pCubes = Vec_IntFetch( vStore, pcRes->nCubes ); + if ( pcRes->pCubes == NULL ) + { + pcRes->nCubes = -1; + return NULL; + } + k = 0; + for ( i = 0; i < pcRes0->nCubes; i++ ) + pcRes->pCubes[k++] = pcRes0->pCubes[i] | (1 << ((Var<<1)+0)); + for ( i = 0; i < pcRes1->nCubes; i++ ) + pcRes->pCubes[k++] = pcRes1->pCubes[i] | (1 << ((Var<<1)+1)); + for ( i = 0; i < pcRes2->nCubes; i++ ) + pcRes->pCubes[k++] = pcRes2->pCubes[i]; + assert( k == pcRes->nCubes ); + // create the resulting truth table + Kit_TruthOr( pTemp0, puRes0, puRes2, Var ); + Kit_TruthOr( pTemp1, puRes1, puRes2, Var ); + // copy the table if needed + nWords <<= 1; + for ( i = 1; i < nWordsAll/nWords; i++ ) + for ( k = 0; k < nWords; k++ ) + pTemp[i*nWords + k] = pTemp[k]; + // verify in the end +// assert( Kit_TruthIsImply( puOn, pTemp, nVars ) ); +// assert( Kit_TruthIsImply( pTemp, puOnDc, nVars ) ); + return pTemp; +} + +/**Function************************************************************* + + Synopsis [Computes ISOP for 5 variables or less.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_TruthIsop5_rec( unsigned uOn, unsigned uOnDc, int nVars, Kit_Sop_t * pcRes, Vec_Int_t * vStore ) +{ + unsigned uMasks[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 }; + Kit_Sop_t cRes0, cRes1, cRes2; + Kit_Sop_t * pcRes0 = &cRes0, * pcRes1 = &cRes1, * pcRes2 = &cRes2; + unsigned uOn0, uOn1, uOnDc0, uOnDc1, uRes0, uRes1, uRes2; + int i, k, Var; + assert( nVars <= 5 ); + assert( (uOn & ~uOnDc) == 0 ); + if ( uOn == 0 ) + { + pcRes->nCubes = 0; + pcRes->pCubes = NULL; + return 0; + } + if ( uOnDc == 0xFFFFFFFF ) + { + pcRes->nCubes = 1; + pcRes->pCubes = Vec_IntFetch( vStore, 1 ); + if ( pcRes->pCubes == NULL ) + { + pcRes->nCubes = -1; + return 0; + } + pcRes->pCubes[0] = 0; + return 0xFFFFFFFF; + } + assert( nVars > 0 ); + // find the topmost var + for ( Var = nVars-1; Var >= 0; Var-- ) + if ( Kit_TruthVarInSupport( &uOn, 5, Var ) || + Kit_TruthVarInSupport( &uOnDc, 5, Var ) ) + break; + assert( Var >= 0 ); + // cofactor + uOn0 = uOn1 = uOn; + uOnDc0 = uOnDc1 = uOnDc; + Kit_TruthCofactor0( &uOn0, Var + 1, Var ); + Kit_TruthCofactor1( &uOn1, Var + 1, Var ); + Kit_TruthCofactor0( &uOnDc0, Var + 1, Var ); + Kit_TruthCofactor1( &uOnDc1, Var + 1, Var ); + // solve for cofactors + uRes0 = Kit_TruthIsop5_rec( uOn0 & ~uOnDc1, uOnDc0, Var, pcRes0, vStore ); + if ( pcRes0->nCubes == -1 ) + { + pcRes->nCubes = -1; + return 0; + } + uRes1 = Kit_TruthIsop5_rec( uOn1 & ~uOnDc0, uOnDc1, Var, pcRes1, vStore ); + if ( pcRes1->nCubes == -1 ) + { + pcRes->nCubes = -1; + return 0; + } + uRes2 = Kit_TruthIsop5_rec( (uOn0 & ~uRes0) | (uOn1 & ~uRes1), uOnDc0 & uOnDc1, Var, pcRes2, vStore ); + if ( pcRes2->nCubes == -1 ) + { + pcRes->nCubes = -1; + return 0; + } + // create the resulting cover + pcRes->nCubes = pcRes0->nCubes + pcRes1->nCubes + pcRes2->nCubes; + pcRes->pCubes = Vec_IntFetch( vStore, pcRes->nCubes ); + if ( pcRes->pCubes == NULL ) + { + pcRes->nCubes = -1; + return 0; + } + k = 0; + for ( i = 0; i < pcRes0->nCubes; i++ ) + pcRes->pCubes[k++] = pcRes0->pCubes[i] | (1 << ((Var<<1)+0)); + for ( i = 0; i < pcRes1->nCubes; i++ ) + pcRes->pCubes[k++] = pcRes1->pCubes[i] | (1 << ((Var<<1)+1)); + for ( i = 0; i < pcRes2->nCubes; i++ ) + pcRes->pCubes[k++] = pcRes2->pCubes[i]; + assert( k == pcRes->nCubes ); + // derive the final truth table + uRes2 |= (uRes0 & ~uMasks[Var]) | (uRes1 & uMasks[Var]); +// assert( (uOn & ~uRes2) == 0 ); +// assert( (uRes2 & ~uOnDc) == 0 ); + return uRes2; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitSop.c b/src/aig/kit/kitSop.c new file mode 100644 index 00000000..20ad0651 --- /dev/null +++ b/src/aig/kit/kitSop.c @@ -0,0 +1,572 @@ +/**CFile**************************************************************** + + FileName [kitSop.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Procedures involving SOPs.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitSop.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Creates SOP from the cube array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopCreate( Kit_Sop_t * cResult, Vec_Int_t * vInput, int nVars, Vec_Int_t * vMemory ) +{ + unsigned uCube; + int i; + // start the cover + cResult->nCubes = 0; + cResult->pCubes = Vec_IntFetch( vMemory, Vec_IntSize(vInput) ); + // add the cubes + Vec_IntForEachEntry( vInput, uCube, i ) + Kit_SopPushCube( cResult, uCube ); +} + +/**Function************************************************************* + + Synopsis [Creates SOP from the cube array.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopCreateInverse( Kit_Sop_t * cResult, Vec_Int_t * vInput, int nLits, Vec_Int_t * vMemory ) +{ + unsigned uCube, uMask = 0; + int i, nCubes = Vec_IntSize(vInput); + // start the cover + cResult->nCubes = 0; + cResult->pCubes = Vec_IntFetch( vMemory, nCubes ); + // add the cubes +// Vec_IntForEachEntry( vInput, uCube, i ) + for ( i = 0; i < nCubes; i++ ) + { + uCube = Vec_IntEntry( vInput, i ); + uMask = ((uCube | (uCube >> 1)) & 0x55555555); + uMask |= (uMask << 1); + Kit_SopPushCube( cResult, uCube ^ uMask ); + } +} + +/**Function************************************************************* + + Synopsis [Duplicates SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopDup( Kit_Sop_t * cResult, Kit_Sop_t * cSop, Vec_Int_t * vMemory ) +{ + unsigned uCube; + int i; + // start the cover + cResult->nCubes = 0; + cResult->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) ); + // add the cubes + Kit_SopForEachCube( cSop, uCube, i ) + Kit_SopPushCube( cResult, uCube ); +} + +/**Function************************************************************* + + Synopsis [Derives the quotient of division by literal.] + + Description [Reduces the cover to be equal to the result of + division of the given cover by the literal.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopDivideByLiteralQuo( Kit_Sop_t * cSop, int iLit ) +{ + unsigned uCube; + int i, k = 0; + Kit_SopForEachCube( cSop, uCube, i ) + { + if ( Kit_CubeHasLit(uCube, iLit) ) + Kit_SopWriteCube( cSop, Kit_CubeRemLit(uCube, iLit), k++ ); + } + Kit_SopShrink( cSop, k ); +} + + +/**Function************************************************************* + + Synopsis [Divides cover by one cube.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopDivideByCube( Kit_Sop_t * cSop, Kit_Sop_t * cDiv, Kit_Sop_t * vQuo, Kit_Sop_t * vRem, Vec_Int_t * vMemory ) +{ + unsigned uCube, uDiv; + int i; + // get the only cube + assert( Kit_SopCubeNum(cDiv) == 1 ); + uDiv = Kit_SopCube(cDiv, 0); + // allocate covers + vQuo->nCubes = 0; + vQuo->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) ); + vRem->nCubes = 0; + vRem->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) ); + // sort the cubes + Kit_SopForEachCube( cSop, uCube, i ) + { + if ( Kit_CubeContains( uCube, uDiv ) ) + Kit_SopPushCube( vQuo, Kit_CubeSharp(uCube, uDiv) ); + else + Kit_SopPushCube( vRem, uCube ); + } +} + +/**Function************************************************************* + + Synopsis [Divides cover by one cube.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopDivideInternal( Kit_Sop_t * cSop, Kit_Sop_t * cDiv, Kit_Sop_t * vQuo, Kit_Sop_t * vRem, Vec_Int_t * vMemory ) +{ + unsigned uCube, uDiv, uCube2, uDiv2, uQuo; + int i, i2, k, k2, nCubesRem; + assert( Kit_SopCubeNum(cSop) >= Kit_SopCubeNum(cDiv) ); + // consider special case + if ( Kit_SopCubeNum(cDiv) == 1 ) + { + Kit_SopDivideByCube( cSop, cDiv, vQuo, vRem, vMemory ); + return; + } + // allocate quotient + vQuo->nCubes = 0; + vQuo->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) / Kit_SopCubeNum(cDiv) ); + // for each cube of the cover + // it either belongs to the quotient or to the remainder + Kit_SopForEachCube( cSop, uCube, i ) + { + // skip taken cubes + if ( Kit_CubeIsMarked(uCube) ) + continue; + // find a matching cube in the divisor + uDiv = ~0; + Kit_SopForEachCube( cDiv, uDiv, k ) + if ( Kit_CubeContains( uCube, uDiv ) ) + break; + // the cube is not found + if ( k == Kit_SopCubeNum(cDiv) ) + continue; + // the quotient cube exists + uQuo = Kit_CubeSharp( uCube, uDiv ); + // find corresponding cubes for other cubes of the divisor + uDiv2 = ~0; + Kit_SopForEachCube( cDiv, uDiv2, k2 ) + { + if ( k2 == k ) + continue; + // find a matching cube + Kit_SopForEachCube( cSop, uCube2, i2 ) + { + // skip taken cubes + if ( Kit_CubeIsMarked(uCube2) ) + continue; + // check if the cube can be used + if ( Kit_CubeContains( uCube2, uDiv2 ) && uQuo == Kit_CubeSharp( uCube2, uDiv2 ) ) + break; + } + // the case when the cube is not found + if ( i2 == Kit_SopCubeNum(cSop) ) + break; + } + // we did not find some cubes - continue looking at other cubes + if ( k2 != Kit_SopCubeNum(cDiv) ) + continue; + // we found all cubes - add the quotient cube + Kit_SopPushCube( vQuo, uQuo ); + + // mark the first cube + Kit_SopWriteCube( cSop, Kit_CubeMark(uCube), i ); + // mark other cubes that have this quotient + Kit_SopForEachCube( cDiv, uDiv2, k2 ) + { + if ( k2 == k ) + continue; + // find a matching cube + Kit_SopForEachCube( cSop, uCube2, i2 ) + { + // skip taken cubes + if ( Kit_CubeIsMarked(uCube2) ) + continue; + // check if the cube can be used + if ( Kit_CubeContains( uCube2, uDiv2 ) && uQuo == Kit_CubeSharp( uCube2, uDiv2 ) ) + break; + } + assert( i2 < Kit_SopCubeNum(cSop) ); + // the cube is found, mark it + // (later we will add all unmarked cubes to the remainder) + Kit_SopWriteCube( cSop, Kit_CubeMark(uCube2), i2 ); + } + } + // determine the number of cubes in the remainder + nCubesRem = Kit_SopCubeNum(cSop) - Kit_SopCubeNum(vQuo) * Kit_SopCubeNum(cDiv); + // allocate remainder + vRem->nCubes = 0; + vRem->pCubes = Vec_IntFetch( vMemory, nCubesRem ); + // finally add the remaining unmarked cubes to the remainder + // and clean the marked cubes in the cover + Kit_SopForEachCube( cSop, uCube, i ) + { + if ( !Kit_CubeIsMarked(uCube) ) + { + Kit_SopPushCube( vRem, uCube ); + continue; + } + Kit_SopWriteCube( cSop, Kit_CubeUnmark(uCube), i ); + } + assert( nCubesRem == Kit_SopCubeNum(vRem) ); +} + +/**Function************************************************************* + + Synopsis [Returns the common cube.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline unsigned Kit_SopCommonCube( Kit_Sop_t * cSop ) +{ + unsigned uMask, uCube; + int i; + uMask = ~(unsigned)0; + Kit_SopForEachCube( cSop, uCube, i ) + uMask &= uCube; + return uMask; +} + +/**Function************************************************************* + + Synopsis [Makes the cover cube-free.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopMakeCubeFree( Kit_Sop_t * cSop ) +{ + unsigned uMask, uCube; + int i; + uMask = Kit_SopCommonCube( cSop ); + if ( uMask == 0 ) + return; + // remove the common cube + Kit_SopForEachCube( cSop, uCube, i ) + Kit_SopWriteCube( cSop, Kit_CubeSharp(uCube, uMask), i ); +} + +/**Function************************************************************* + + Synopsis [Checks if the cover is cube-free.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_SopIsCubeFree( Kit_Sop_t * cSop ) +{ + return Kit_SopCommonCube( cSop ) == 0; +} + +/**Function************************************************************* + + Synopsis [Creates SOP composes of the common cube of the given SOP.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopCommonCubeCover( Kit_Sop_t * cResult, Kit_Sop_t * cSop, Vec_Int_t * vMemory ) +{ + assert( Kit_SopCubeNum(cSop) > 0 ); + cResult->nCubes = 0; + cResult->pCubes = Vec_IntFetch( vMemory, 1 ); + Kit_SopPushCube( cResult, Kit_SopCommonCube(cSop) ); +} + + +/**Function************************************************************* + + Synopsis [Find any literal that occurs more than once.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_SopAnyLiteral( Kit_Sop_t * cSop, int nLits ) +{ + unsigned uCube; + int i, k, nLitsCur; + // go through each literal + for ( i = 0; i < nLits; i++ ) + { + // go through all the cubes + nLitsCur = 0; + Kit_SopForEachCube( cSop, uCube, k ) + if ( Kit_CubeHasLit(uCube, i) ) + nLitsCur++; + if ( nLitsCur > 1 ) + return i; + } + return -1; +} + +/**Function************************************************************* + + Synopsis [Find the least often occurring literal.] + + Description [Find the least often occurring literal among those + that occur more than once.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_SopWorstLiteral( Kit_Sop_t * cSop, int nLits ) +{ + unsigned uCube; + int i, k, iMin, nLitsMin, nLitsCur; + int fUseFirst = 1; + + // go through each literal + iMin = -1; + nLitsMin = 1000000; + for ( i = 0; i < nLits; i++ ) + { + // go through all the cubes + nLitsCur = 0; + Kit_SopForEachCube( cSop, uCube, k ) + if ( Kit_CubeHasLit(uCube, i) ) + nLitsCur++; + // skip the literal that does not occur or occurs once + if ( nLitsCur < 2 ) + continue; + // check if this is the best literal + if ( fUseFirst ) + { + if ( nLitsMin > nLitsCur ) + { + nLitsMin = nLitsCur; + iMin = i; + } + } + else + { + if ( nLitsMin >= nLitsCur ) + { + nLitsMin = nLitsCur; + iMin = i; + } + } + } + if ( nLitsMin < 1000000 ) + return iMin; + return -1; +} + +/**Function************************************************************* + + Synopsis [Find the least often occurring literal.] + + Description [Find the least often occurring literal among those + that occur more than once.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_SopBestLiteral( Kit_Sop_t * cSop, int nLits, unsigned uMask ) +{ + unsigned uCube; + int i, k, iMax, nLitsMax, nLitsCur; + int fUseFirst = 1; + + // go through each literal + iMax = -1; + nLitsMax = -1; + for ( i = 0; i < nLits; i++ ) + { + if ( !Kit_CubeHasLit(uMask, i) ) + continue; + // go through all the cubes + nLitsCur = 0; + Kit_SopForEachCube( cSop, uCube, k ) + if ( Kit_CubeHasLit(uCube, i) ) + nLitsCur++; + // skip the literal that does not occur or occurs once + if ( nLitsCur < 2 ) + continue; + // check if this is the best literal + if ( fUseFirst ) + { + if ( nLitsMax < nLitsCur ) + { + nLitsMax = nLitsCur; + iMax = i; + } + } + else + { + if ( nLitsMax <= nLitsCur ) + { + nLitsMax = nLitsCur; + iMax = i; + } + } + } + if ( nLitsMax >= 0 ) + return iMax; + return -1; +} + +/**Function************************************************************* + + Synopsis [Computes a level-zero kernel.] + + Description [Modifies the cover to contain one level-zero kernel.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopDivisorZeroKernel_rec( Kit_Sop_t * cSop, int nLits ) +{ + int iLit; + // find any literal that occurs at least two times + iLit = Kit_SopWorstLiteral( cSop, nLits ); + if ( iLit == -1 ) + return; + // derive the cube-free quotient + Kit_SopDivideByLiteralQuo( cSop, iLit ); // the same cover + Kit_SopMakeCubeFree( cSop ); // the same cover + // call recursively + Kit_SopDivisorZeroKernel_rec( cSop, nLits ); // the same cover +} + +/**Function************************************************************* + + Synopsis [Computes the quick divisor of the cover.] + + Description [Returns 0, if there is no divisor other than trivial.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_SopDivisor( Kit_Sop_t * cResult, Kit_Sop_t * cSop, int nLits, Vec_Int_t * vMemory ) +{ + if ( Kit_SopCubeNum(cSop) <= 1 ) + return 0; + if ( Kit_SopAnyLiteral( cSop, nLits ) == -1 ) + return 0; + // duplicate the cover + Kit_SopDup( cResult, cSop, vMemory ); + // perform the kerneling + Kit_SopDivisorZeroKernel_rec( cResult, nLits ); + assert( Kit_SopCubeNum(cResult) > 0 ); + return 1; +} + + +/**Function************************************************************* + + Synopsis [Create the one-literal cover with the best literal from cSop.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_SopBestLiteralCover( Kit_Sop_t * cResult, Kit_Sop_t * cSop, unsigned uCube, int nLits, Vec_Int_t * vMemory ) +{ + int iLitBest; + // get the best literal + iLitBest = Kit_SopBestLiteral( cSop, nLits, uCube ); + // start the cover + cResult->nCubes = 0; + cResult->pCubes = Vec_IntFetch( vMemory, 1 ); + // set the cube + Kit_SopPushCube( cResult, Kit_CubeSetLit(0, iLitBest) ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kitTruth.c b/src/aig/kit/kitTruth.c new file mode 100644 index 00000000..dab60132 --- /dev/null +++ b/src/aig/kit/kitTruth.c @@ -0,0 +1,1721 @@ +/**CFile**************************************************************** + + FileName [kitTruth.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [Procedures involving truth tables.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kitTruth.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Swaps two adjacent variables in the truth table.] + + Description [Swaps var number Start and var number Start+1 (0-based numbers). + The input truth table is pIn. The output truth table is pOut.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthSwapAdjacentVars( unsigned * pOut, unsigned * pIn, int nVars, int iVar ) +{ + static unsigned PMasks[4][3] = { + { 0x99999999, 0x22222222, 0x44444444 }, + { 0xC3C3C3C3, 0x0C0C0C0C, 0x30303030 }, + { 0xF00FF00F, 0x00F000F0, 0x0F000F00 }, + { 0xFF0000FF, 0x0000FF00, 0x00FF0000 } + }; + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step, Shift; + + assert( iVar < nVars - 1 ); + if ( iVar < 4 ) + { + Shift = (1 << iVar); + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & PMasks[iVar][0]) | ((pIn[i] & PMasks[iVar][1]) << Shift) | ((pIn[i] & PMasks[iVar][2]) >> Shift); + } + else if ( iVar > 4 ) + { + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 4*Step ) + { + for ( i = 0; i < Step; i++ ) + pOut[i] = pIn[i]; + for ( i = 0; i < Step; i++ ) + pOut[Step+i] = pIn[2*Step+i]; + for ( i = 0; i < Step; i++ ) + pOut[2*Step+i] = pIn[Step+i]; + for ( i = 0; i < Step; i++ ) + pOut[3*Step+i] = pIn[3*Step+i]; + pIn += 4*Step; + pOut += 4*Step; + } + } + else // if ( iVar == 4 ) + { + for ( i = 0; i < nWords; i += 2 ) + { + pOut[i] = (pIn[i] & 0x0000FFFF) | ((pIn[i+1] & 0x0000FFFF) << 16); + pOut[i+1] = (pIn[i+1] & 0xFFFF0000) | ((pIn[i] & 0xFFFF0000) >> 16); + } + } +} + +/**Function************************************************************* + + Synopsis [Swaps two adjacent variables in the truth table.] + + Description [Swaps var number Start and var number Start+1 (0-based numbers). + The input truth table is pIn. The output truth table is pOut.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthSwapAdjacentVars2( unsigned * pIn, unsigned * pOut, int nVars, int Start ) +{ + int nWords = (nVars <= 5)? 1 : (1 << (nVars-5)); + int i, k, Step; + + assert( Start < nVars - 1 ); + switch ( Start ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0x99999999) | ((pIn[i] & 0x22222222) << 1) | ((pIn[i] & 0x44444444) >> 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xC3C3C3C3) | ((pIn[i] & 0x0C0C0C0C) << 2) | ((pIn[i] & 0x30303030) >> 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xF00FF00F) | ((pIn[i] & 0x00F000F0) << 4) | ((pIn[i] & 0x0F000F00) >> 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xFF0000FF) | ((pIn[i] & 0x0000FF00) << 8) | ((pIn[i] & 0x00FF0000) >> 8); + return; + case 4: + for ( i = 0; i < nWords; i += 2 ) + { + pOut[i] = (pIn[i] & 0x0000FFFF) | ((pIn[i+1] & 0x0000FFFF) << 16); + pOut[i+1] = (pIn[i+1] & 0xFFFF0000) | ((pIn[i] & 0xFFFF0000) >> 16); + } + return; + default: + Step = (1 << (Start - 5)); + for ( k = 0; k < nWords; k += 4*Step ) + { + for ( i = 0; i < Step; i++ ) + pOut[i] = pIn[i]; + for ( i = 0; i < Step; i++ ) + pOut[Step+i] = pIn[2*Step+i]; + for ( i = 0; i < Step; i++ ) + pOut[2*Step+i] = pIn[Step+i]; + for ( i = 0; i < Step; i++ ) + pOut[3*Step+i] = pIn[3*Step+i]; + pIn += 4*Step; + pOut += 4*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Expands the truth table according to the phase.] + + Description [The input and output truth tables are in pIn/pOut. The current number + of variables is nVars. The total number of variables in nVarsAll. The last argument + (Phase) contains shows where the variables should go.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthStretch( unsigned * pOut, unsigned * pIn, int nVars, int nVarsAll, unsigned Phase, int fReturnIn ) +{ + unsigned * pTemp; + int i, k, Var = nVars - 1, Counter = 0; + for ( i = nVarsAll - 1; i >= 0; i-- ) + if ( Phase & (1 << i) ) + { + for ( k = Var; k < i; k++ ) + { + Kit_TruthSwapAdjacentVars( pOut, pIn, nVarsAll, k ); + pTemp = pIn; pIn = pOut; pOut = pTemp; + Counter++; + } + Var--; + } + assert( Var == -1 ); + // swap if it was moved an even number of times + if ( fReturnIn ^ !(Counter & 1) ) + Kit_TruthCopy( pOut, pIn, nVarsAll ); +} + +/**Function************************************************************* + + Synopsis [Shrinks the truth table according to the phase.] + + Description [The input and output truth tables are in pIn/pOut. The current number + of variables is nVars. The total number of variables in nVarsAll. The last argument + (Phase) contains shows what variables should remain.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthShrink( unsigned * pOut, unsigned * pIn, int nVars, int nVarsAll, unsigned Phase, int fReturnIn ) +{ + unsigned * pTemp; + int i, k, Var = 0, Counter = 0; + for ( i = 0; i < nVarsAll; i++ ) + if ( Phase & (1 << i) ) + { + for ( k = i-1; k >= Var; k-- ) + { + Kit_TruthSwapAdjacentVars( pOut, pIn, nVarsAll, k ); + pTemp = pIn; pIn = pOut; pOut = pTemp; + Counter++; + } + Var++; + } + assert( Var == nVars ); + // swap if it was moved an even number of times + if ( fReturnIn ^ !(Counter & 1) ) + Kit_TruthCopy( pOut, pIn, nVarsAll ); +} + + +/**Function************************************************************* + + Synopsis [Returns 1 if TT depends on the given variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthVarInSupport( unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + if ( (pTruth[i] & 0x55555555) != ((pTruth[i] & 0xAAAAAAAA) >> 1) ) + return 1; + return 0; + case 1: + for ( i = 0; i < nWords; i++ ) + if ( (pTruth[i] & 0x33333333) != ((pTruth[i] & 0xCCCCCCCC) >> 2) ) + return 1; + return 0; + case 2: + for ( i = 0; i < nWords; i++ ) + if ( (pTruth[i] & 0x0F0F0F0F) != ((pTruth[i] & 0xF0F0F0F0) >> 4) ) + return 1; + return 0; + case 3: + for ( i = 0; i < nWords; i++ ) + if ( (pTruth[i] & 0x00FF00FF) != ((pTruth[i] & 0xFF00FF00) >> 8) ) + return 1; + return 0; + case 4: + for ( i = 0; i < nWords; i++ ) + if ( (pTruth[i] & 0x0000FFFF) != ((pTruth[i] & 0xFFFF0000) >> 16) ) + return 1; + return 0; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + if ( pTruth[i] != pTruth[Step+i] ) + return 1; + pTruth += 2*Step; + } + return 0; + } +} + +/**Function************************************************************* + + Synopsis [Returns the number of support vars.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthSupportSize( unsigned * pTruth, int nVars ) +{ + int i, Counter = 0; + for ( i = 0; i < nVars; i++ ) + Counter += Kit_TruthVarInSupport( pTruth, nVars, i ); + return Counter; +} + +/**Function************************************************************* + + Synopsis [Returns support of the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_TruthSupport( unsigned * pTruth, int nVars ) +{ + int i, Support = 0; + for ( i = 0; i < nVars; i++ ) + if ( Kit_TruthVarInSupport( pTruth, nVars, i ) ) + Support |= (1 << i); + return Support; +} + + + +/**Function************************************************************* + + Synopsis [Computes negative cofactor of the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCofactor0( unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0x55555555) | ((pTruth[i] & 0x55555555) << 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0x33333333) | ((pTruth[i] & 0x33333333) << 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0x0F0F0F0F) | ((pTruth[i] & 0x0F0F0F0F) << 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0x00FF00FF) | ((pTruth[i] & 0x00FF00FF) << 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0x0000FFFF) | ((pTruth[i] & 0x0000FFFF) << 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + pTruth[Step+i] = pTruth[i]; + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Computes positive cofactor of the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCofactor1( unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0xAAAAAAAA) | ((pTruth[i] & 0xAAAAAAAA) >> 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0xCCCCCCCC) | ((pTruth[i] & 0xCCCCCCCC) >> 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0xF0F0F0F0) | ((pTruth[i] & 0xF0F0F0F0) >> 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0xFF00FF00) | ((pTruth[i] & 0xFF00FF00) >> 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = (pTruth[i] & 0xFFFF0000) | ((pTruth[i] & 0xFFFF0000) >> 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + pTruth[i] = pTruth[Step+i]; + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Computes positive cofactor of the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCofactor0New( unsigned * pOut, unsigned * pIn, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0x55555555) | ((pIn[i] & 0x55555555) << 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0x33333333) | ((pIn[i] & 0x33333333) << 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0x0F0F0F0F) | ((pIn[i] & 0x0F0F0F0F) << 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0x00FF00FF) | ((pIn[i] & 0x00FF00FF) << 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0x0000FFFF) | ((pIn[i] & 0x0000FFFF) << 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + pOut[i] = pOut[Step+i] = pIn[i]; + pIn += 2*Step; + pOut += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Computes positive cofactor of the function.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCofactor1New( unsigned * pOut, unsigned * pIn, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xAAAAAAAA) | ((pIn[i] & 0xAAAAAAAA) >> 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xCCCCCCCC) | ((pIn[i] & 0xCCCCCCCC) >> 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xF0F0F0F0) | ((pIn[i] & 0xF0F0F0F0) >> 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xFF00FF00) | ((pIn[i] & 0xFF00FF00) >> 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pIn[i] & 0xFFFF0000) | ((pIn[i] & 0xFFFF0000) >> 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + pOut[i] = pOut[Step+i] = pIn[Step+i]; + pIn += 2*Step; + pOut += 2*Step; + } + return; + } +} + + +/**Function************************************************************* + + Synopsis [Existentially quantifies the variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthExist( unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pTruth[i] |= ((pTruth[i] & 0xAAAAAAAA) >> 1) | ((pTruth[i] & 0x55555555) << 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pTruth[i] |= ((pTruth[i] & 0xCCCCCCCC) >> 2) | ((pTruth[i] & 0x33333333) << 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pTruth[i] |= ((pTruth[i] & 0xF0F0F0F0) >> 4) | ((pTruth[i] & 0x0F0F0F0F) << 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pTruth[i] |= ((pTruth[i] & 0xFF00FF00) >> 8) | ((pTruth[i] & 0x00FF00FF) << 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pTruth[i] |= ((pTruth[i] & 0xFFFF0000) >> 16) | ((pTruth[i] & 0x0000FFFF) << 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pTruth[i] |= pTruth[Step+i]; + pTruth[Step+i] = pTruth[i]; + } + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Existentially quantifies the variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthExistNew( unsigned * pRes, unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] | ((pTruth[i] & 0xAAAAAAAA) >> 1) | ((pTruth[i] & 0x55555555) << 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] | ((pTruth[i] & 0xCCCCCCCC) >> 2) | ((pTruth[i] & 0x33333333) << 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] | ((pTruth[i] & 0xF0F0F0F0) >> 4) | ((pTruth[i] & 0x0F0F0F0F) << 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] | ((pTruth[i] & 0xFF00FF00) >> 8) | ((pTruth[i] & 0x00FF00FF) << 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] | ((pTruth[i] & 0xFFFF0000) >> 16) | ((pTruth[i] & 0x0000FFFF) << 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pRes[i] = pTruth[i] | pTruth[Step+i]; + pRes[Step+i] = pRes[i]; + } + pRes += 2*Step; + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Existantially quantifies the set of variables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthExistSet( unsigned * pRes, unsigned * pTruth, int nVars, unsigned uMask ) +{ + int v; + Kit_TruthCopy( pRes, pTruth, nVars ); + for ( v = 0; v < nVars; v++ ) + if ( uMask & (1 << v) ) + Kit_TruthExist( pRes, nVars, v ); +} + +/**Function************************************************************* + + Synopsis [Unversally quantifies the variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthForall( unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pTruth[i] &= ((pTruth[i] & 0xAAAAAAAA) >> 1) | ((pTruth[i] & 0x55555555) << 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pTruth[i] &= ((pTruth[i] & 0xCCCCCCCC) >> 2) | ((pTruth[i] & 0x33333333) << 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pTruth[i] &= ((pTruth[i] & 0xF0F0F0F0) >> 4) | ((pTruth[i] & 0x0F0F0F0F) << 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pTruth[i] &= ((pTruth[i] & 0xFF00FF00) >> 8) | ((pTruth[i] & 0x00FF00FF) << 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pTruth[i] &= ((pTruth[i] & 0xFFFF0000) >> 16) | ((pTruth[i] & 0x0000FFFF) << 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pTruth[i] &= pTruth[Step+i]; + pTruth[Step+i] = pTruth[i]; + } + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Universally quantifies the variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthForallNew( unsigned * pRes, unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] & (((pTruth[i] & 0xAAAAAAAA) >> 1) | ((pTruth[i] & 0x55555555) << 1)); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] & (((pTruth[i] & 0xCCCCCCCC) >> 2) | ((pTruth[i] & 0x33333333) << 2)); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] & (((pTruth[i] & 0xF0F0F0F0) >> 4) | ((pTruth[i] & 0x0F0F0F0F) << 4)); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] & (((pTruth[i] & 0xFF00FF00) >> 8) | ((pTruth[i] & 0x00FF00FF) << 8)); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] & (((pTruth[i] & 0xFFFF0000) >> 16) | ((pTruth[i] & 0x0000FFFF) << 16)); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pRes[i] = pTruth[i] & pTruth[Step+i]; + pRes[Step+i] = pRes[i]; + } + pRes += 2*Step; + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Universally quantifies the variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthUniqueNew( unsigned * pRes, unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] ^ (((pTruth[i] & 0xAAAAAAAA) >> 1) | ((pTruth[i] & 0x55555555) << 1)); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] ^ (((pTruth[i] & 0xCCCCCCCC) >> 2) | ((pTruth[i] & 0x33333333) << 2)); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] ^ (((pTruth[i] & 0xF0F0F0F0) >> 4) | ((pTruth[i] & 0x0F0F0F0F) << 4)); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] ^ (((pTruth[i] & 0xFF00FF00) >> 8) | ((pTruth[i] & 0x00FF00FF) << 8)); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pRes[i] = pTruth[i] ^ (((pTruth[i] & 0xFFFF0000) >> 16) | ((pTruth[i] & 0x0000FFFF) << 16)); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pRes[i] = pTruth[i] ^ pTruth[Step+i]; + pRes[Step+i] = pRes[i]; + } + pRes += 2*Step; + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Universally quantifies the set of variables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthForallSet( unsigned * pRes, unsigned * pTruth, int nVars, unsigned uMask ) +{ + int v; + Kit_TruthCopy( pRes, pTruth, nVars ); + for ( v = 0; v < nVars; v++ ) + if ( uMask & (1 << v) ) + Kit_TruthForall( pRes, nVars, v ); +} + + +/**Function************************************************************* + + Synopsis [Multiplexes two functions with the given variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthMuxVar( unsigned * pOut, unsigned * pCof0, unsigned * pCof1, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pCof0[i] & 0x55555555) | (pCof1[i] & 0xAAAAAAAA); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pCof0[i] & 0x33333333) | (pCof1[i] & 0xCCCCCCCC); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pCof0[i] & 0x0F0F0F0F) | (pCof1[i] & 0xF0F0F0F0); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pCof0[i] & 0x00FF00FF) | (pCof1[i] & 0xFF00FF00); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (pCof0[i] & 0x0000FFFF) | (pCof1[i] & 0xFFFF0000); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pOut[i] = pCof0[i]; + pOut[Step+i] = pCof1[Step+i]; + } + pOut += 2*Step; + pCof0 += 2*Step; + pCof1 += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Multiplexes two functions with the given variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthMuxVarPhase( unsigned * pOut, unsigned * pCof0, unsigned * pCof1, int nVars, int iVar, int fCompl0 ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + + if ( fCompl0 == 0 ) + { + Kit_TruthMuxVar( pOut, pCof0, pCof1, nVars, iVar ); + return; + } + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (~pCof0[i] & 0x55555555) | (pCof1[i] & 0xAAAAAAAA); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (~pCof0[i] & 0x33333333) | (pCof1[i] & 0xCCCCCCCC); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (~pCof0[i] & 0x0F0F0F0F) | (pCof1[i] & 0xF0F0F0F0); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (~pCof0[i] & 0x00FF00FF) | (pCof1[i] & 0xFF00FF00); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pOut[i] = (~pCof0[i] & 0x0000FFFF) | (pCof1[i] & 0xFFFF0000); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + pOut[i] = ~pCof0[i]; + pOut[Step+i] = pCof1[Step+i]; + } + pOut += 2*Step; + pCof0 += 2*Step; + pCof1 += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Checks symmetry of two variables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthVarsSymm( unsigned * pTruth, int nVars, int iVar0, int iVar1 ) +{ + static unsigned uTemp0[16], uTemp1[16]; + assert( nVars <= 9 ); + // compute Cof01 + Kit_TruthCopy( uTemp0, pTruth, nVars ); + Kit_TruthCofactor0( uTemp0, nVars, iVar0 ); + Kit_TruthCofactor1( uTemp0, nVars, iVar1 ); + // compute Cof10 + Kit_TruthCopy( uTemp1, pTruth, nVars ); + Kit_TruthCofactor1( uTemp1, nVars, iVar0 ); + Kit_TruthCofactor0( uTemp1, nVars, iVar1 ); + // compare + return Kit_TruthIsEqual( uTemp0, uTemp1, nVars ); +} + +/**Function************************************************************* + + Synopsis [Checks antisymmetry of two variables.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthVarsAntiSymm( unsigned * pTruth, int nVars, int iVar0, int iVar1 ) +{ + static unsigned uTemp0[16], uTemp1[16]; + assert( nVars <= 9 ); + // compute Cof00 + Kit_TruthCopy( uTemp0, pTruth, nVars ); + Kit_TruthCofactor0( uTemp0, nVars, iVar0 ); + Kit_TruthCofactor0( uTemp0, nVars, iVar1 ); + // compute Cof11 + Kit_TruthCopy( uTemp1, pTruth, nVars ); + Kit_TruthCofactor1( uTemp1, nVars, iVar0 ); + Kit_TruthCofactor1( uTemp1, nVars, iVar1 ); + // compare + return Kit_TruthIsEqual( uTemp0, uTemp1, nVars ); +} + +/**Function************************************************************* + + Synopsis [Changes phase of the function w.r.t. one variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthChangePhase( unsigned * pTruth, int nVars, int iVar ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Step; + unsigned Temp; + + assert( iVar < nVars ); + switch ( iVar ) + { + case 0: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ((pTruth[i] & 0x55555555) << 1) | ((pTruth[i] & 0xAAAAAAAA) >> 1); + return; + case 1: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ((pTruth[i] & 0x33333333) << 2) | ((pTruth[i] & 0xCCCCCCCC) >> 2); + return; + case 2: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ((pTruth[i] & 0x0F0F0F0F) << 4) | ((pTruth[i] & 0xF0F0F0F0) >> 4); + return; + case 3: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ((pTruth[i] & 0x00FF00FF) << 8) | ((pTruth[i] & 0xFF00FF00) >> 8); + return; + case 4: + for ( i = 0; i < nWords; i++ ) + pTruth[i] = ((pTruth[i] & 0x0000FFFF) << 16) | ((pTruth[i] & 0xFFFF0000) >> 16); + return; + default: + Step = (1 << (iVar - 5)); + for ( k = 0; k < nWords; k += 2*Step ) + { + for ( i = 0; i < Step; i++ ) + { + Temp = pTruth[i]; + pTruth[i] = pTruth[Step+i]; + pTruth[Step+i] = Temp; + } + pTruth += 2*Step; + } + return; + } +} + +/**Function************************************************************* + + Synopsis [Computes minimum overlap in supports of cofactors.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthMinCofSuppOverlap( unsigned * pTruth, int nVars, int * pVarMin ) +{ + static unsigned uCofactor[16]; + int i, ValueCur, ValueMin, VarMin; + unsigned uSupp0, uSupp1; + int nVars0, nVars1; + assert( nVars <= 9 ); + ValueMin = 32; + VarMin = -1; + for ( i = 0; i < nVars; i++ ) + { + // get negative cofactor + Kit_TruthCopy( uCofactor, pTruth, nVars ); + Kit_TruthCofactor0( uCofactor, nVars, i ); + uSupp0 = Kit_TruthSupport( uCofactor, nVars ); + nVars0 = Kit_WordCountOnes( uSupp0 ); +//Kit_PrintBinary( stdout, &uSupp0, 8 ); printf( "\n" ); + // get positive cofactor + Kit_TruthCopy( uCofactor, pTruth, nVars ); + Kit_TruthCofactor1( uCofactor, nVars, i ); + uSupp1 = Kit_TruthSupport( uCofactor, nVars ); + nVars1 = Kit_WordCountOnes( uSupp1 ); +//Kit_PrintBinary( stdout, &uSupp1, 8 ); printf( "\n" ); + // get the number of common vars + ValueCur = Kit_WordCountOnes( uSupp0 & uSupp1 ); + if ( ValueMin > ValueCur && nVars0 <= 5 && nVars1 <= 5 ) + { + ValueMin = ValueCur; + VarMin = i; + } + if ( ValueMin == 0 ) + break; + } + if ( pVarMin ) + *pVarMin = VarMin; + return ValueMin; +} + + +/**Function************************************************************* + + Synopsis [Find the best cofactoring variable.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthBestCofVar( unsigned * pTruth, int nVars, unsigned * pCof0, unsigned * pCof1 ) +{ + int i, iBestVar, nSuppSizeCur0, nSuppSizeCur1, nSuppSizeCur, nSuppSizeMin; + if ( Kit_TruthIsConst0(pTruth, nVars) || Kit_TruthIsConst1(pTruth, nVars) ) + return -1; + // iterate through variables + iBestVar = -1; + nSuppSizeMin = KIT_INFINITY; + for ( i = 0; i < nVars; i++ ) + { + // cofactor the functiona and get support sizes + Kit_TruthCofactor0New( pCof0, pTruth, nVars, i ); + Kit_TruthCofactor1New( pCof1, pTruth, nVars, i ); + nSuppSizeCur0 = Kit_TruthSupportSize( pCof0, nVars ); + nSuppSizeCur1 = Kit_TruthSupportSize( pCof1, nVars ); + nSuppSizeCur = nSuppSizeCur0 + nSuppSizeCur1; + // compare this variable with other variables + if ( nSuppSizeMin > nSuppSizeCur ) + { + nSuppSizeMin = nSuppSizeCur; + iBestVar = i; + } + } + assert( iBestVar != -1 ); + // cofactor w.r.t. this variable + Kit_TruthCofactor0New( pCof0, pTruth, nVars, iBestVar ); + Kit_TruthCofactor1New( pCof1, pTruth, nVars, iBestVar ); + return iBestVar; +} + + +/**Function************************************************************* + + Synopsis [Counts the number of 1's in each cofactor.] + + Description [The resulting numbers are stored in the array of shorts, + whose length is 2*nVars. The number of 1's is counted in a different + space than the original function. For example, if the function depends + on k variables, the cofactors are assumed to depend on k-1 variables.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCountOnesInCofs( unsigned * pTruth, int nVars, short * pStore ) +{ + int nWords = Kit_TruthWordNum( nVars ); + int i, k, Counter; + memset( pStore, 0, sizeof(short) * 2 * nVars ); + if ( nVars <= 5 ) + { + if ( nVars > 0 ) + { + pStore[2*0+0] = Kit_WordCountOnes( pTruth[0] & 0x55555555 ); + pStore[2*0+1] = Kit_WordCountOnes( pTruth[0] & 0xAAAAAAAA ); + } + if ( nVars > 1 ) + { + pStore[2*1+0] = Kit_WordCountOnes( pTruth[0] & 0x33333333 ); + pStore[2*1+1] = Kit_WordCountOnes( pTruth[0] & 0xCCCCCCCC ); + } + if ( nVars > 2 ) + { + pStore[2*2+0] = Kit_WordCountOnes( pTruth[0] & 0x0F0F0F0F ); + pStore[2*2+1] = Kit_WordCountOnes( pTruth[0] & 0xF0F0F0F0 ); + } + if ( nVars > 3 ) + { + pStore[2*3+0] = Kit_WordCountOnes( pTruth[0] & 0x00FF00FF ); + pStore[2*3+1] = Kit_WordCountOnes( pTruth[0] & 0xFF00FF00 ); + } + if ( nVars > 4 ) + { + pStore[2*4+0] = Kit_WordCountOnes( pTruth[0] & 0x0000FFFF ); + pStore[2*4+1] = Kit_WordCountOnes( pTruth[0] & 0xFFFF0000 ); + } + return; + } + // nVars >= 6 + // count 1's for all other variables + for ( k = 0; k < nWords; k++ ) + { + Counter = Kit_WordCountOnes( pTruth[k] ); + for ( i = 5; i < nVars; i++ ) + if ( k & (1 << (i-5)) ) + pStore[2*i+1] += Counter; + else + pStore[2*i+0] += Counter; + } + // count 1's for the first five variables + for ( k = 0; k < nWords/2; k++ ) + { + pStore[2*0+0] += Kit_WordCountOnes( (pTruth[0] & 0x55555555) | ((pTruth[1] & 0x55555555) << 1) ); + pStore[2*0+1] += Kit_WordCountOnes( (pTruth[0] & 0xAAAAAAAA) | ((pTruth[1] & 0xAAAAAAAA) >> 1) ); + pStore[2*1+0] += Kit_WordCountOnes( (pTruth[0] & 0x33333333) | ((pTruth[1] & 0x33333333) << 2) ); + pStore[2*1+1] += Kit_WordCountOnes( (pTruth[0] & 0xCCCCCCCC) | ((pTruth[1] & 0xCCCCCCCC) >> 2) ); + pStore[2*2+0] += Kit_WordCountOnes( (pTruth[0] & 0x0F0F0F0F) | ((pTruth[1] & 0x0F0F0F0F) << 4) ); + pStore[2*2+1] += Kit_WordCountOnes( (pTruth[0] & 0xF0F0F0F0) | ((pTruth[1] & 0xF0F0F0F0) >> 4) ); + pStore[2*3+0] += Kit_WordCountOnes( (pTruth[0] & 0x00FF00FF) | ((pTruth[1] & 0x00FF00FF) << 8) ); + pStore[2*3+1] += Kit_WordCountOnes( (pTruth[0] & 0xFF00FF00) | ((pTruth[1] & 0xFF00FF00) >> 8) ); + pStore[2*4+0] += Kit_WordCountOnes( (pTruth[0] & 0x0000FFFF) | ((pTruth[1] & 0x0000FFFF) << 16) ); + pStore[2*4+1] += Kit_WordCountOnes( (pTruth[0] & 0xFFFF0000) | ((pTruth[1] & 0xFFFF0000) >> 16) ); + pTruth += 2; + } +} + +/**Function************************************************************* + + Synopsis [Counts the number of 1's in each cofactor.] + + Description [Verifies the above procedure.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCountOnesInCofsSlow( unsigned * pTruth, int nVars, short * pStore, unsigned * pAux ) +{ + int i; + for ( i = 0; i < nVars; i++ ) + { + Kit_TruthCofactor0New( pAux, pTruth, nVars, i ); + pStore[2*i+0] = Kit_TruthCountOnes( pAux, nVars ) / 2; + Kit_TruthCofactor1New( pAux, pTruth, nVars, i ); + pStore[2*i+1] = Kit_TruthCountOnes( pAux, nVars ) / 2; + } +} + +/**Function************************************************************* + + Synopsis [Canonicize the truth table.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_TruthHash( unsigned * pIn, int nWords ) +{ + // The 1,024 smallest prime numbers used to compute the hash value + // http://www.math.utah.edu/~alfeld/math/primelist.html + static int HashPrimes[1024] = { 2, 3, 5, + 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, + 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, + 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, + 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, + 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, + 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, + 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, + 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, + 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997, + 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091, + 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153, 1163, 1171, 1181, 1187, 1193, + 1201, 1213, 1217, 1223, 1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291, + 1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373, 1381, 1399, 1409, 1423, + 1427, 1429, 1433, 1439, 1447, 1451, 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, + 1499, 1511, 1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, 1597, 1601, + 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667, 1669, 1693, 1697, 1699, + 1709, 1721, 1723, 1733, 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811, + 1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889, 1901, 1907, 1913, 1931, + 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, + 2039, 2053, 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, 2131, 2137, + 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243, 2251, 2267, + 2269, 2273, 2281, 2287, 2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357, + 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423, 2437, 2441, 2447, 2459, + 2467, 2473, 2477, 2503, 2521, 2531, 2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, + 2609, 2617, 2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687, 2689, 2693, + 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791, + 2797, 2801, 2803, 2819, 2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903, + 2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999, 3001, 3011, 3019, 3023, + 3037, 3041, 3049, 3061, 3067, 3079, 3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, + 3169, 3181, 3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257, 3259, 3271, + 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331, 3343, 3347, 3359, 3361, 3371, 3373, + 3389, 3391, 3407, 3413, 3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511, + 3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583, 3593, 3607, + 3613, 3617, 3623, 3631, 3637, 3643, 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709, + 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779, 3793, 3797, 3803, 3821, 3823, 3833, + 3847, 3851, 3853, 3863, 3877, 3881, 3889, 3907, 3911, 3917, 3919, 3923, 3929, 3931, + 3943, 3947, 3967, 3989, 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, + 4073, 4079, 4091, 4093, 4099, 4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177, + 4201, 4211, 4217, 4219, 4229, 4231, 4241, 4243, 4253, 4259, 4261, 4271, 4273, 4283, + 4289, 4297, 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391, 4397, 4409, 4421, 4423, + 4441, 4447, 4451, 4457, 4463, 4481, 4483, 4493, 4507, 4513, 4517, 4519, 4523, 4547, + 4549, 4561, 4567, 4583, 4591, 4597, 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657, + 4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729, 4733, 4751, 4759, 4783, 4787, 4789, + 4793, 4799, 4801, 4813, 4817, 4831, 4861, 4871, 4877, 4889, 4903, 4909, 4919, 4931, + 4933, 4937, 4943, 4951, 4957, 4967, 4969, 4973, 4987, 4993, 4999, 5003, 5009, 5011, + 5021, 5023, 5039, 5051, 5059, 5077, 5081, 5087, 5099, 5101, 5107, 5113, 5119, 5147, + 5153, 5167, 5171, 5179, 5189, 5197, 5209, 5227, 5231, 5233, 5237, 5261, 5273, 5279, + 5281, 5297, 5303, 5309, 5323, 5333, 5347, 5351, 5381, 5387, 5393, 5399, 5407, 5413, + 5417, 5419, 5431, 5437, 5441, 5443, 5449, 5471, 5477, 5479, 5483, 5501, 5503, 5507, + 5519, 5521, 5527, 5531, 5557, 5563, 5569, 5573, 5581, 5591, 5623, 5639, 5641, 5647, + 5651, 5653, 5657, 5659, 5669, 5683, 5689, 5693, 5701, 5711, 5717, 5737, 5741, 5743, + 5749, 5779, 5783, 5791, 5801, 5807, 5813, 5821, 5827, 5839, 5843, 5849, 5851, 5857, + 5861, 5867, 5869, 5879, 5881, 5897, 5903, 5923, 5927, 5939, 5953, 5981, 5987, 6007, + 6011, 6029, 6037, 6043, 6047, 6053, 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, + 6131, 6133, 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, 6229, 6247, + 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, 6311, 6317, 6323, 6329, 6337, 6343, + 6353, 6359, 6361, 6367, 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, + 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, 6577, 6581, 6599, 6607, + 6619, 6637, 6653, 6659, 6661, 6673, 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, + 6737, 6761, 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, 6841, 6857, + 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, 6947, 6949, 6959, 6961, 6967, 6971, + 6977, 6983, 6991, 6997, 7001, 7013, 7019, 7027, 7039, 7043, 7057, 7069, 7079, 7103, + 7109, 7121, 7127, 7129, 7151, 7159, 7177, 7187, 7193, 7207, 7211, 7213, 7219, 7229, + 7237, 7243, 7247, 7253, 7283, 7297, 7307, 7309, 7321, 7331, 7333, 7349, 7351, 7369, + 7393, 7411, 7417, 7433, 7451, 7457, 7459, 7477, 7481, 7487, 7489, 7499, 7507, 7517, + 7523, 7529, 7537, 7541, 7547, 7549, 7559, 7561, 7573, 7577, 7583, 7589, 7591, 7603, + 7607, 7621, 7639, 7643, 7649, 7669, 7673, 7681, 7687, 7691, 7699, 7703, 7717, 7723, + 7727, 7741, 7753, 7757, 7759, 7789, 7793, 7817, 7823, 7829, 7841, 7853, 7867, 7873, + 7877, 7879, 7883, 7901, 7907, 7919, 7927, 7933, 7937, 7949, 7951, 7963, 7993, 8009, + 8011, 8017, 8039, 8053, 8059, 8069, 8081, 8087, 8089, 8093, 8101, 8111, 8117, 8123, + 8147, 8161 }; + int i; + unsigned uHashKey; + assert( nWords <= 1024 ); + uHashKey = 0; + for ( i = 0; i < nWords; i++ ) + uHashKey ^= HashPrimes[i] * pIn[i]; + return uHashKey; +} + + +/**Function************************************************************* + + Synopsis [Canonicize the truth table.] + + Description [Returns the phase. ] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Kit_TruthSemiCanonicize( unsigned * pInOut, unsigned * pAux, int nVars, char * pCanonPerm, short * pStore ) +{ +// short pStore2[32]; + unsigned * pIn = pInOut, * pOut = pAux, * pTemp; +// int nWords = Kit_TruthWordNum( nVars ); + int i, Temp, fChange, Counter;//, nOnes;//, k, j, w, Limit; + unsigned uCanonPhase; + + // canonicize output + uCanonPhase = 0; +/* + nOnes = Kit_TruthCountOnes(pIn, nVars); + if ( (nOnes > nWords * 16) )//|| ((nOnes == nWords * 16) && (pIn[0] & 1)) ) + { + uCanonPhase |= (1 << nVars); + Kit_TruthNot( pIn, pIn, nVars ); + } +*/ + // collect the minterm counts + Kit_TruthCountOnesInCofs( pIn, nVars, pStore ); +// Kit_TruthCountOnesInCofsSlow( pIn, nVars, pStore2, pAux ); +// for ( i = 0; i < 2*nVars; i++ ) +// { +// assert( pStore[i] == pStore2[i] ); +// } + + // canonicize phase + for ( i = 0; i < nVars; i++ ) + { + if ( pStore[2*i+0] >= pStore[2*i+1] ) + continue; + uCanonPhase |= (1 << i); + Temp = pStore[2*i+0]; + pStore[2*i+0] = pStore[2*i+1]; + pStore[2*i+1] = Temp; + Kit_TruthChangePhase( pIn, nVars, i ); + } + +// Kit_PrintHexadecimal( stdout, pIn, nVars ); +// printf( "\n" ); + + // permute + Counter = 0; + do { + fChange = 0; + for ( i = 0; i < nVars-1; i++ ) + { + if ( pStore[2*i] >= pStore[2*(i+1)] ) + continue; + Counter++; + fChange = 1; + + Temp = pCanonPerm[i]; + pCanonPerm[i] = pCanonPerm[i+1]; + pCanonPerm[i+1] = Temp; + + Temp = pStore[2*i]; + pStore[2*i] = pStore[2*(i+1)]; + pStore[2*(i+1)] = Temp; + + Temp = pStore[2*i+1]; + pStore[2*i+1] = pStore[2*(i+1)+1]; + pStore[2*(i+1)+1] = Temp; + + // if the polarity of variables is different, swap them + if ( ((uCanonPhase & (1 << i)) > 0) != ((uCanonPhase & (1 << (i+1))) > 0) ) + { + uCanonPhase ^= (1 << i); + uCanonPhase ^= (1 << (i+1)); + } + + Kit_TruthSwapAdjacentVars( pOut, pIn, nVars, i ); + pTemp = pIn; pIn = pOut; pOut = pTemp; + } + } while ( fChange ); + +/* + Extra_PrintBinary( stdout, &uCanonPhase, nVars+1 ); printf( " : " ); + for ( i = 0; i < nVars; i++ ) + printf( "%d=%d/%d ", pCanonPerm[i], pStore[2*i], pStore[2*i+1] ); + printf( " C = %d\n", Counter ); + Extra_PrintHexadecimal( stdout, pIn, nVars ); + printf( "\n" ); +*/ + +/* + // process symmetric variable groups + uSymms = 0; + for ( i = 0; i < nVars-1; i++ ) + { + if ( pStore[2*i] != pStore[2*(i+1)] ) // i and i+1 cannot be symmetric + continue; + if ( pStore[2*i] != pStore[2*i+1] ) + continue; + if ( Kit_TruthVarsSymm( pIn, nVars, i, i+1 ) ) + continue; + if ( Kit_TruthVarsAntiSymm( pIn, nVars, i, i+1 ) ) + Kit_TruthChangePhase( pIn, nVars, i+1 ); + } +*/ + +/* + // process symmetric variable groups + uSymms = 0; + for ( i = 0; i < nVars-1; i++ ) + { + if ( pStore[2*i] != pStore[2*(i+1)] ) // i and i+1 cannot be symmetric + continue; + // i and i+1 can be symmetric + // find the end of this group + for ( k = i+1; k < nVars; k++ ) + if ( pStore[2*i] != pStore[2*k] ) + break; + Limit = k; + assert( i < Limit-1 ); + // go through the variables in this group + for ( j = i + 1; j < Limit; j++ ) + { + // check symmetry + if ( Kit_TruthVarsSymm( pIn, nVars, i, j ) ) + { + uSymms |= (1 << j); + continue; + } + // they are phase-unknown + if ( pStore[2*i] == pStore[2*i+1] ) + { + if ( Kit_TruthVarsAntiSymm( pIn, nVars, i, j ) ) + { + Kit_TruthChangePhase( pIn, nVars, j ); + uCanonPhase ^= (1 << j); + uSymms |= (1 << j); + continue; + } + } + + // they are not symmetric - move j as far as it goes in the group + for ( k = j; k < Limit-1; k++ ) + { + Counter++; + + Temp = pCanonPerm[k]; + pCanonPerm[k] = pCanonPerm[k+1]; + pCanonPerm[k+1] = Temp; + + assert( pStore[2*k] == pStore[2*(k+1)] ); + Kit_TruthSwapAdjacentVars( pOut, pIn, nVars, k ); + pTemp = pIn; pIn = pOut; pOut = pTemp; + } + Limit--; + j--; + } + i = Limit - 1; + } +*/ + + // swap if it was moved an even number of times + if ( Counter & 1 ) + Kit_TruthCopy( pOut, pIn, nVars ); + return uCanonPhase; +} + + +/**Function************************************************************* + + Synopsis [Fast counting minterms in the cofactors of a function.] + + Description [Returns the total number of minterms in the function. + The resulting array (pRes) contains the number of minterms in 0-cofactor + w.r.t. each variables. The additional array (pBytes) is used for internal + storage. It should have the size equal to the number of truth table bytes.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Kit_TruthCountMinterms( unsigned * pTruth, int nVars, int * pRes, int * pBytes ) +{ + // the number of 1s if every byte as well as in the 0-cofactors w.r.t. three variables + static unsigned Table[256] = { + 0x00000000, 0x01010101, 0x01010001, 0x02020102, 0x01000101, 0x02010202, 0x02010102, 0x03020203, + 0x01000001, 0x02010102, 0x02010002, 0x03020103, 0x02000102, 0x03010203, 0x03010103, 0x04020204, + 0x00010101, 0x01020202, 0x01020102, 0x02030203, 0x01010202, 0x02020303, 0x02020203, 0x03030304, + 0x01010102, 0x02020203, 0x02020103, 0x03030204, 0x02010203, 0x03020304, 0x03020204, 0x04030305, + 0x00010001, 0x01020102, 0x01020002, 0x02030103, 0x01010102, 0x02020203, 0x02020103, 0x03030204, + 0x01010002, 0x02020103, 0x02020003, 0x03030104, 0x02010103, 0x03020204, 0x03020104, 0x04030205, + 0x00020102, 0x01030203, 0x01030103, 0x02040204, 0x01020203, 0x02030304, 0x02030204, 0x03040305, + 0x01020103, 0x02030204, 0x02030104, 0x03040205, 0x02020204, 0x03030305, 0x03030205, 0x04040306, + 0x00000101, 0x01010202, 0x01010102, 0x02020203, 0x01000202, 0x02010303, 0x02010203, 0x03020304, + 0x01000102, 0x02010203, 0x02010103, 0x03020204, 0x02000203, 0x03010304, 0x03010204, 0x04020305, + 0x00010202, 0x01020303, 0x01020203, 0x02030304, 0x01010303, 0x02020404, 0x02020304, 0x03030405, + 0x01010203, 0x02020304, 0x02020204, 0x03030305, 0x02010304, 0x03020405, 0x03020305, 0x04030406, + 0x00010102, 0x01020203, 0x01020103, 0x02030204, 0x01010203, 0x02020304, 0x02020204, 0x03030305, + 0x01010103, 0x02020204, 0x02020104, 0x03030205, 0x02010204, 0x03020305, 0x03020205, 0x04030306, + 0x00020203, 0x01030304, 0x01030204, 0x02040305, 0x01020304, 0x02030405, 0x02030305, 0x03040406, + 0x01020204, 0x02030305, 0x02030205, 0x03040306, 0x02020305, 0x03030406, 0x03030306, 0x04040407, + 0x00000001, 0x01010102, 0x01010002, 0x02020103, 0x01000102, 0x02010203, 0x02010103, 0x03020204, + 0x01000002, 0x02010103, 0x02010003, 0x03020104, 0x02000103, 0x03010204, 0x03010104, 0x04020205, + 0x00010102, 0x01020203, 0x01020103, 0x02030204, 0x01010203, 0x02020304, 0x02020204, 0x03030305, + 0x01010103, 0x02020204, 0x02020104, 0x03030205, 0x02010204, 0x03020305, 0x03020205, 0x04030306, + 0x00010002, 0x01020103, 0x01020003, 0x02030104, 0x01010103, 0x02020204, 0x02020104, 0x03030205, + 0x01010003, 0x02020104, 0x02020004, 0x03030105, 0x02010104, 0x03020205, 0x03020105, 0x04030206, + 0x00020103, 0x01030204, 0x01030104, 0x02040205, 0x01020204, 0x02030305, 0x02030205, 0x03040306, + 0x01020104, 0x02030205, 0x02030105, 0x03040206, 0x02020205, 0x03030306, 0x03030206, 0x04040307, + 0x00000102, 0x01010203, 0x01010103, 0x02020204, 0x01000203, 0x02010304, 0x02010204, 0x03020305, + 0x01000103, 0x02010204, 0x02010104, 0x03020205, 0x02000204, 0x03010305, 0x03010205, 0x04020306, + 0x00010203, 0x01020304, 0x01020204, 0x02030305, 0x01010304, 0x02020405, 0x02020305, 0x03030406, + 0x01010204, 0x02020305, 0x02020205, 0x03030306, 0x02010305, 0x03020406, 0x03020306, 0x04030407, + 0x00010103, 0x01020204, 0x01020104, 0x02030205, 0x01010204, 0x02020305, 0x02020205, 0x03030306, + 0x01010104, 0x02020205, 0x02020105, 0x03030206, 0x02010205, 0x03020306, 0x03020206, 0x04030307, + 0x00020204, 0x01030305, 0x01030205, 0x02040306, 0x01020305, 0x02030406, 0x02030306, 0x03040407, + 0x01020205, 0x02030306, 0x02030206, 0x03040307, 0x02020306, 0x03030407, 0x03030307, 0x04040408 + }; + unsigned uSum; + unsigned char * pTruthC, * pLimit; + int i, iVar, Step, nWords, nBytes, nTotal; + + assert( nVars <= 20 ); + + // clear storage + memset( pRes, 0, sizeof(int) * nVars ); + + // count the number of one's in 0-cofactors of the first three variables + nTotal = uSum = 0; + nWords = Kit_TruthWordNum( nVars ); + nBytes = nWords * 4; + pTruthC = (unsigned char *)pTruth; + pLimit = pTruthC + nBytes; + for ( ; pTruthC < pLimit; pTruthC++ ) + { + uSum += Table[*pTruthC]; + *pBytes++ = (Table[*pTruthC] & 0xff); + if ( (uSum & 0xff) > 246 ) + { + nTotal += (uSum & 0xff); + pRes[0] += ((uSum >> 8) & 0xff); + pRes[2] += ((uSum >> 16) & 0xff); + pRes[3] += ((uSum >> 24) & 0xff); + uSum = 0; + } + } + if ( uSum ) + { + nTotal += (uSum & 0xff); + pRes[0] += ((uSum >> 8) & 0xff); + pRes[1] += ((uSum >> 16) & 0xff); + pRes[2] += ((uSum >> 24) & 0xff); + } + + // count all other variables + for ( iVar = 3, Step = 1; Step < nBytes; Step *= 2, iVar++ ) + for ( i = 0; i < nBytes; i += Step + Step ) + { + pRes[iVar] += pBytes[i]; + pBytes[i] += pBytes[i+Step]; + } + assert( pBytes[0] == nTotal ); + assert( iVar == nVars ); + return nTotal; +} + +/**Function************************************************************* + + Synopsis [Prints the hex unsigned into a file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_PrintHexadecimal( FILE * pFile, unsigned Sign[], int nVars ) +{ + int nDigits, Digit, k; + // write the number into the file + nDigits = (1 << nVars) / 4; + for ( k = nDigits - 1; k >= 0; k-- ) + { + Digit = ((Sign[k/8] >> ((k%8) * 4)) & 15); + if ( Digit < 10 ) + fprintf( pFile, "%d", Digit ); + else + fprintf( pFile, "%c", 'a' + Digit-10 ); + } +// fprintf( pFile, "\n" ); +} + +/**Function************************************************************* + + Synopsis [Fast counting minterms for the functions.] + + Description [Returns 0 if the function is a constant.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Kit_TruthCountMintermsPrecomp() +{ + int bit_count[256] = { + 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5, + 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6, + 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6, + 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7, + 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6, + 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7, + 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7, + 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8 + }; + unsigned i, uWord; + for ( i = 0; i < 256; i++ ) + { + if ( i % 8 == 0 ) + printf( "\n" ); + uWord = bit_count[i]; + uWord |= (bit_count[i & 0x55] << 8); + uWord |= (bit_count[i & 0x33] << 16); + uWord |= (bit_count[i & 0x0f] << 24); + printf( "0x" ); + Kit_PrintHexadecimal( stdout, &uWord, 5 ); + printf( ", " ); + } +} + +/**Function************************************************************* + + Synopsis [Dumps truth table into a file.] + + Description [Generates script file for reading into ABC.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Kit_TruthDumpToFile( unsigned * pTruth, int nVars, int nFile ) +{ + static char pFileName[100]; + FILE * pFile; + sprintf( pFileName, "tt\\s%04d", nFile ); + pFile = fopen( pFileName, "w" ); + fprintf( pFile, "rt " ); + Kit_PrintHexadecimal( pFile, pTruth, nVars ); + fprintf( pFile, "; bdd; sop; ps\n" ); + fclose( pFile ); + return pFileName; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/kit_.c b/src/aig/kit/kit_.c new file mode 100644 index 00000000..5c68ee3c --- /dev/null +++ b/src/aig/kit/kit_.c @@ -0,0 +1,48 @@ +/**CFile**************************************************************** + + FileName [kit_.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Computation kit.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - Dec 6, 2006.] + + Revision [$Id: kit_.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "kit.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/kit/module.make b/src/aig/kit/module.make new file mode 100644 index 00000000..ea62381b --- /dev/null +++ b/src/aig/kit/module.make @@ -0,0 +1,10 @@ +SRC += src/aig/kit/kitAig.c \ + src/aig/kit/kitBdd.c \ + src/aig/kit/kitCloud.c src/aig/kit/cloud.c \ + src/aig/kit/kitDsd.c \ + src/aig/kit/kitFactor.c \ + src/aig/kit/kitGraph.c \ + src/aig/kit/kitHop.c \ + src/aig/kit/kitIsop.c \ + src/aig/kit/kitSop.c \ + src/aig/kit/kitTruth.c diff --git a/src/aig/mem/mem.c b/src/aig/mem/mem.c new file mode 100644 index 00000000..f5bfbfd8 --- /dev/null +++ b/src/aig/mem/mem.c @@ -0,0 +1,604 @@ +/**CFile**************************************************************** + + FileName [esopMem.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Cover manipulation package.] + + Synopsis [Memory managers.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: esopMem.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include "mem.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +struct Mem_Fixed_t_ +{ + // information about individual entries + int nEntrySize; // the size of one entry + int nEntriesAlloc; // the total number of entries allocated + int nEntriesUsed; // the number of entries in use + int nEntriesMax; // the max number of entries in use + char * pEntriesFree; // the linked list of free entries + + // this is where the memory is stored + int nChunkSize; // the size of one chunk + int nChunksAlloc; // the maximum number of memory chunks + int nChunks; // the current number of memory chunks + char ** pChunks; // the allocated memory + + // statistics + int nMemoryUsed; // memory used in the allocated entries + int nMemoryAlloc; // memory allocated +}; + +struct Mem_Flex_t_ +{ + // information about individual entries + int nEntriesUsed; // the number of entries allocated + char * pCurrent; // the current pointer to free memory + char * pEnd; // the first entry outside the free memory + + // this is where the memory is stored + int nChunkSize; // the size of one chunk + int nChunksAlloc; // the maximum number of memory chunks + int nChunks; // the current number of memory chunks + char ** pChunks; // the allocated memory + + // statistics + int nMemoryUsed; // memory used in the allocated entries + int nMemoryAlloc; // memory allocated +}; + +struct Mem_Step_t_ +{ + int nMems; // the number of fixed memory managers employed + Mem_Fixed_t ** pMems; // memory managers: 2^1 words, 2^2 words, etc + int nMapSize; // the size of the memory array + Mem_Fixed_t ** pMap; // maps the number of bytes into its memory manager +}; + +#define ALLOC(type, num) ((type *) malloc(sizeof(type) * (num))) +#define FREE(obj) ((obj) ? (free((char *) (obj)), (obj) = 0) : 0) +#define REALLOC(type, obj, num) \ + ((obj) ? ((type *) realloc((char *)(obj), sizeof(type) * (num))) : \ + ((type *) malloc(sizeof(type) * (num)))) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Allocates memory pieces of fixed size.] + + Description [The size of the chunk is computed as the minimum of + 1024 entries and 64K. Can only work with entry size at least 4 byte long.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Mem_Fixed_t * Mem_FixedStart( int nEntrySize ) +{ + Mem_Fixed_t * p; + + p = ALLOC( Mem_Fixed_t, 1 ); + memset( p, 0, sizeof(Mem_Fixed_t) ); + + p->nEntrySize = nEntrySize; + p->nEntriesAlloc = 0; + p->nEntriesUsed = 0; + p->pEntriesFree = NULL; + + if ( nEntrySize * (1 << 10) < (1<<16) ) + p->nChunkSize = (1 << 10); + else + p->nChunkSize = (1<<16) / nEntrySize; + if ( p->nChunkSize < 8 ) + p->nChunkSize = 8; + + p->nChunksAlloc = 64; + p->nChunks = 0; + p->pChunks = ALLOC( char *, p->nChunksAlloc ); + + p->nMemoryUsed = 0; + p->nMemoryAlloc = 0; + return p; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_FixedStop( Mem_Fixed_t * p, int fVerbose ) +{ + int i; + if ( p == NULL ) + return; + if ( fVerbose ) + { + printf( "Fixed memory manager: Entry = %5d. Chunk = %5d. Chunks used = %5d.\n", + p->nEntrySize, p->nChunkSize, p->nChunks ); + printf( " Entries used = %8d. Entries peak = %8d. Memory used = %8d. Memory alloc = %8d.\n", + p->nEntriesUsed, p->nEntriesMax, p->nEntrySize * p->nEntriesUsed, p->nMemoryAlloc ); + } + for ( i = 0; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + free( p->pChunks ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Mem_FixedEntryFetch( Mem_Fixed_t * p ) +{ + char * pTemp; + int i; + + // check if there are still free entries + if ( p->nEntriesUsed == p->nEntriesAlloc ) + { // need to allocate more entries + assert( p->pEntriesFree == NULL ); + if ( p->nChunks == p->nChunksAlloc ) + { + p->nChunksAlloc *= 2; + p->pChunks = REALLOC( char *, p->pChunks, p->nChunksAlloc ); + } + p->pEntriesFree = ALLOC( char, p->nEntrySize * p->nChunkSize ); + p->nMemoryAlloc += p->nEntrySize * p->nChunkSize; + // transform these entries into a linked list + pTemp = p->pEntriesFree; + for ( i = 1; i < p->nChunkSize; i++ ) + { + *((char **)pTemp) = pTemp + p->nEntrySize; + pTemp += p->nEntrySize; + } + // set the last link + *((char **)pTemp) = NULL; + // add the chunk to the chunk storage + p->pChunks[ p->nChunks++ ] = p->pEntriesFree; + // add to the number of entries allocated + p->nEntriesAlloc += p->nChunkSize; + } + // incrememt the counter of used entries + p->nEntriesUsed++; + if ( p->nEntriesMax < p->nEntriesUsed ) + p->nEntriesMax = p->nEntriesUsed; + // return the first entry in the free entry list + pTemp = p->pEntriesFree; + p->pEntriesFree = *((char **)pTemp); + return pTemp; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_FixedEntryRecycle( Mem_Fixed_t * p, char * pEntry ) +{ + // decrement the counter of used entries + p->nEntriesUsed--; + // add the entry to the linked list of free entries + *((char **)pEntry) = p->pEntriesFree; + p->pEntriesFree = pEntry; +} + +/**Function************************************************************* + + Synopsis [] + + Description [Relocates all the memory except the first chunk.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_FixedRestart( Mem_Fixed_t * p ) +{ + int i; + char * pTemp; + + // deallocate all chunks except the first one + for ( i = 1; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + p->nChunks = 1; + // transform these entries into a linked list + pTemp = p->pChunks[0]; + for ( i = 1; i < p->nChunkSize; i++ ) + { + *((char **)pTemp) = pTemp + p->nEntrySize; + pTemp += p->nEntrySize; + } + // set the last link + *((char **)pTemp) = NULL; + // set the free entry list + p->pEntriesFree = p->pChunks[0]; + // set the correct statistics + p->nMemoryAlloc = p->nEntrySize * p->nChunkSize; + p->nMemoryUsed = 0; + p->nEntriesAlloc = p->nChunkSize; + p->nEntriesUsed = 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mem_FixedReadMemUsage( Mem_Fixed_t * p ) +{ + return p->nMemoryAlloc; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mem_FixedReadMaxEntriesUsed( Mem_Fixed_t * p ) +{ + return p->nEntriesMax; +} + + + +/**Function************************************************************* + + Synopsis [Allocates entries of flexible size.] + + Description [Can only work with entry size at least 4 byte long.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Mem_Flex_t * Mem_FlexStart() +{ + Mem_Flex_t * p; + + p = ALLOC( Mem_Flex_t, 1 ); + memset( p, 0, sizeof(Mem_Flex_t) ); + + p->nEntriesUsed = 0; + p->pCurrent = NULL; + p->pEnd = NULL; + + p->nChunkSize = (1 << 14); + p->nChunksAlloc = 64; + p->nChunks = 0; + p->pChunks = ALLOC( char *, p->nChunksAlloc ); + + p->nMemoryUsed = 0; + p->nMemoryAlloc = 0; + return p; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_FlexStop( Mem_Flex_t * p, int fVerbose ) +{ + int i; + if ( p == NULL ) + return; + if ( fVerbose ) + { + printf( "Flexible memory manager: Chunk size = %d. Chunks used = %d.\n", + p->nChunkSize, p->nChunks ); + printf( " Entries used = %d. Memory used = %d. Memory alloc = %d.\n", + p->nEntriesUsed, p->nMemoryUsed, p->nMemoryAlloc ); + } + for ( i = 0; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + free( p->pChunks ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Mem_FlexEntryFetch( Mem_Flex_t * p, int nBytes ) +{ + char * pTemp; + // check if there are still free entries + if ( p->pCurrent == NULL || p->pCurrent + nBytes > p->pEnd ) + { // need to allocate more entries + if ( p->nChunks == p->nChunksAlloc ) + { + p->nChunksAlloc *= 2; + p->pChunks = REALLOC( char *, p->pChunks, p->nChunksAlloc ); + } + if ( nBytes > p->nChunkSize ) + { + // resize the chunk size if more memory is requested than it can give + // (ideally, this should never happen) + p->nChunkSize = 2 * nBytes; + } + p->pCurrent = ALLOC( char, p->nChunkSize ); + p->pEnd = p->pCurrent + p->nChunkSize; + p->nMemoryAlloc += p->nChunkSize; + // add the chunk to the chunk storage + p->pChunks[ p->nChunks++ ] = p->pCurrent; + } + assert( p->pCurrent + nBytes <= p->pEnd ); + // increment the counter of used entries + p->nEntriesUsed++; + // keep track of the memory used + p->nMemoryUsed += nBytes; + // return the next entry + pTemp = p->pCurrent; + p->pCurrent += nBytes; + return pTemp; +} + +/**Function************************************************************* + + Synopsis [] + + Description [Relocates all the memory except the first chunk.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_FlexRestart( Mem_Flex_t * p ) +{ + int i; + if ( p->nChunks == 0 ) + return; + // deallocate all chunks except the first one + for ( i = 1; i < p->nChunks; i++ ) + free( p->pChunks[i] ); + p->nChunks = 1; + p->nMemoryAlloc = p->nChunkSize; + // transform these entries into a linked list + p->pCurrent = p->pChunks[0]; + p->pEnd = p->pCurrent + p->nChunkSize; + p->nEntriesUsed = 0; + p->nMemoryUsed = 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mem_FlexReadMemUsage( Mem_Flex_t * p ) +{ + return p->nMemoryUsed; +} + + + + + +/**Function************************************************************* + + Synopsis [Starts the hierarchical memory manager.] + + Description [This manager can allocate entries of any size. + Iternally they are mapped into the entries with the number of bytes + equal to the power of 2. The smallest entry size is 8 bytes. The + next one is 16 bytes etc. So, if the user requests 6 bytes, he gets + 8 byte entry. If we asks for 25 bytes, he gets 32 byte entry etc. + The input parameters "nSteps" says how many fixed memory managers + are employed internally. Calling this procedure with nSteps equal + to 10 results in 10 hierarchically arranged internal memory managers, + which can allocate up to 4096 (1Kb) entries. Requests for larger + entries are handed over to malloc() and then free()ed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Mem_Step_t * Mem_StepStart( int nSteps ) +{ + Mem_Step_t * p; + int i, k; + p = ALLOC( Mem_Step_t, 1 ); + memset( p, 0, sizeof(Mem_Step_t) ); + p->nMems = nSteps; + // start the fixed memory managers + p->pMems = ALLOC( Mem_Fixed_t *, p->nMems ); + for ( i = 0; i < p->nMems; i++ ) + p->pMems[i] = Mem_FixedStart( (8<<i) ); + // set up the mapping of the required memory size into the corresponding manager + p->nMapSize = (4<<p->nMems); + p->pMap = ALLOC( Mem_Fixed_t *, p->nMapSize+1 ); + p->pMap[0] = NULL; + for ( k = 1; k <= 4; k++ ) + p->pMap[k] = p->pMems[0]; + for ( i = 0; i < p->nMems; i++ ) + for ( k = (4<<i)+1; k <= (8<<i); k++ ) + p->pMap[k] = p->pMems[i]; +//for ( i = 1; i < 100; i ++ ) +//printf( "%10d: size = %10d\n", i, p->pMap[i]->nEntrySize ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the memory manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_StepStop( Mem_Step_t * p, int fVerbose ) +{ + int i; + for ( i = 0; i < p->nMems; i++ ) + Mem_FixedStop( p->pMems[i], fVerbose ); +// if ( p->pLargeChunks ) +// { +// for ( i = 0; i < p->nLargeChunks; i++ ) +// free( p->pLargeChunks[i] ); +// free( p->pLargeChunks ); +// } + free( p->pMems ); + free( p->pMap ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Creates the entry.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Mem_StepEntryFetch( Mem_Step_t * p, int nBytes ) +{ + if ( nBytes == 0 ) + return NULL; + if ( nBytes > p->nMapSize ) + { +// printf( "Allocating %d bytes.\n", nBytes ); +/* + if ( p->nLargeChunks == p->nLargeChunksAlloc ) + { + if ( p->nLargeChunksAlloc == 0 ) + p->nLargeChunksAlloc = 5; + p->nLargeChunksAlloc *= 2; + p->pLargeChunks = REALLOC( char *, p->pLargeChunks, p->nLargeChunksAlloc ); + } + p->pLargeChunks[ p->nLargeChunks++ ] = ALLOC( char, nBytes ); + return p->pLargeChunks[ p->nLargeChunks - 1 ]; +*/ + return ALLOC( char, nBytes ); + } + return Mem_FixedEntryFetch( p->pMap[nBytes] ); +} + + +/**Function************************************************************* + + Synopsis [Recycles the entry.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Mem_StepEntryRecycle( Mem_Step_t * p, char * pEntry, int nBytes ) +{ + if ( nBytes == 0 ) + return; + if ( nBytes > p->nMapSize ) + { + free( pEntry ); + return; + } + Mem_FixedEntryRecycle( p->pMap[nBytes], pEntry ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mem_StepReadMemUsage( Mem_Step_t * p ) +{ + int i, nMemTotal = 0; + for ( i = 0; i < p->nMems; i++ ) + nMemTotal += p->pMems[i]->nMemoryAlloc; + return nMemTotal; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// diff --git a/src/aig/mem/mem.h b/src/aig/mem/mem.h new file mode 100644 index 00000000..d43e5fc3 --- /dev/null +++ b/src/aig/mem/mem.h @@ -0,0 +1,72 @@ +/**CFile**************************************************************** + + FileName [mem.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Memory management.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: mem.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __MEM_H__ +#define __MEM_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Mem_Fixed_t_ Mem_Fixed_t; +typedef struct Mem_Flex_t_ Mem_Flex_t; +typedef struct Mem_Step_t_ Mem_Step_t; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== mem.c ===========================================================*/ +// fixed-size-block memory manager +extern Mem_Fixed_t * Mem_FixedStart( int nEntrySize ); +extern void Mem_FixedStop( Mem_Fixed_t * p, int fVerbose ); +extern char * Mem_FixedEntryFetch( Mem_Fixed_t * p ); +extern void Mem_FixedEntryRecycle( Mem_Fixed_t * p, char * pEntry ); +extern void Mem_FixedRestart( Mem_Fixed_t * p ); +extern int Mem_FixedReadMemUsage( Mem_Fixed_t * p ); +extern int Mem_FixedReadMaxEntriesUsed( Mem_Fixed_t * p ); +// flexible-size-block memory manager +extern Mem_Flex_t * Mem_FlexStart(); +extern void Mem_FlexStop( Mem_Flex_t * p, int fVerbose ); +extern char * Mem_FlexEntryFetch( Mem_Flex_t * p, int nBytes ); +extern void Mem_FlexRestart( Mem_Flex_t * p ); +extern int Mem_FlexReadMemUsage( Mem_Flex_t * p ); +// hierarchical memory manager +extern Mem_Step_t * Mem_StepStart( int nSteps ); +extern void Mem_StepStop( Mem_Step_t * p, int fVerbose ); +extern char * Mem_StepEntryFetch( Mem_Step_t * p, int nBytes ); +extern void Mem_StepEntryRecycle( Mem_Step_t * p, char * pEntry, int nBytes ); +extern int Mem_StepReadMemUsage( Mem_Step_t * p ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/mem/module.make b/src/aig/mem/module.make new file mode 100644 index 00000000..ae6fcbe4 --- /dev/null +++ b/src/aig/mem/module.make @@ -0,0 +1 @@ +SRC += src/aig/mem/mem.c diff --git a/src/aig/rwt/module.make b/src/aig/rwt/module.make new file mode 100644 index 00000000..439d576f --- /dev/null +++ b/src/aig/rwt/module.make @@ -0,0 +1,3 @@ +SRC += src/aig/rwt/rwtDec.c \ + src/aig/rwt/rwtMan.c \ + src/aig/rwt/rwtUtil.c diff --git a/src/aig/rwt/rwt.h b/src/aig/rwt/rwt.h new file mode 100644 index 00000000..9199ff2a --- /dev/null +++ b/src/aig/rwt/rwt.h @@ -0,0 +1,156 @@ +/**CFile**************************************************************** + + FileName [rwt.h] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting package.] + + Synopsis [External declarations.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: rwt.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#ifndef __RWT_H__ +#define __RWT_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////////////////// +/// INCLUDES /// +//////////////////////////////////////////////////////////////////////// + +#include "mem.h" +#include "extra.h" +#include "vec.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +#define RWT_LIMIT 1048576/4 // ((1 << 20) +#define RWT_MIN(a,b) (((a) < (b))? (a) : (b)) +#define RWT_MAX(a,b) (((a) > (b))? (a) : (b)) + +typedef struct Rwt_Man_t_ Rwt_Man_t; +typedef struct Rwt_Node_t_ Rwt_Node_t; + +struct Rwt_Man_t_ +{ + // internal lookups + int nFuncs; // number of four var functions + unsigned short * puCanons; // canonical forms + char * pPhases; // canonical phases + char * pPerms; // canonical permutations + unsigned char * pMap; // mapping of functions into class numbers + unsigned short * pMapInv; // mapping of classes into functions + char * pPractical; // practical NPN classes + char ** pPerms4; // four-var permutations + // node space + Vec_Ptr_t * vForest; // all the nodes + Rwt_Node_t ** pTable; // the hash table of nodes by their canonical form + Vec_Vec_t * vClasses; // the nodes of the equivalence classes + Mem_Fixed_t * pMmNode; // memory for nodes and cuts + // statistical variables + int nTravIds; // the counter of traversal IDs + int nConsidered; // the number of nodes considered + int nAdded; // the number of nodes added to lists + int nClasses; // the number of NN classes + // the result of resynthesis + int fCompl; // indicates if the output of FF should be complemented + void * pCut; // the decomposition tree (temporary) + void * pGraph; // the decomposition tree (temporary) + char * pPerm; // permutation used for the best cut + Vec_Ptr_t * vFanins; // the fanins array (temporary) + Vec_Ptr_t * vFaninsCur; // the fanins array (temporary) + Vec_Int_t * vLevNums; // the array of levels (temporary) + Vec_Ptr_t * vNodesTemp; // the nodes in MFFC (temporary) + // node statistics + int nNodesConsidered; + int nNodesRewritten; + int nNodesGained; + int nScores[222]; + int nCutsGood; + int nCutsBad; + int nSubgraphs; + // runtime statistics + int timeStart; + int timeTruth; + int timeCut; + int timeRes; + int timeEval; + int timeMffc; + int timeUpdate; + int timeTotal; +}; + +struct Rwt_Node_t_ // 24 bytes +{ + int Id; // ID + int TravId; // traversal ID + unsigned uTruth : 16; // truth table + unsigned Volume : 8; // volume + unsigned Level : 6; // level + unsigned fUsed : 1; // mark + unsigned fExor : 1; // mark + Rwt_Node_t * p0; // first child + Rwt_Node_t * p1; // second child + Rwt_Node_t * pNext; // next in the table +}; + +// manipulation of complemented attributes +static inline int Rwt_IsComplement( Rwt_Node_t * p ) { return (int)(((unsigned long)p) & 01); } +static inline Rwt_Node_t * Rwt_Regular( Rwt_Node_t * p ) { return (Rwt_Node_t *)((unsigned long)(p) & ~01); } +static inline Rwt_Node_t * Rwt_Not( Rwt_Node_t * p ) { return (Rwt_Node_t *)((unsigned long)(p) ^ 01); } +static inline Rwt_Node_t * Rwt_NotCond( Rwt_Node_t * p, int c ) { return (Rwt_Node_t *)((unsigned long)(p) ^ (c)); } + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== rwrDec.c ========================================================*/ +extern void Rwt_ManPreprocess( Rwt_Man_t * p ); +/*=== rwrMan.c ========================================================*/ +extern Rwt_Man_t * Rwt_ManStart( int fPrecompute ); +extern void Rwt_ManStop( Rwt_Man_t * p ); +extern void Rwt_ManPrintStats( Rwt_Man_t * p ); +extern void Rwt_ManPrintStatsFile( Rwt_Man_t * p ); +extern void * Rwt_ManReadDecs( Rwt_Man_t * p ); +extern Vec_Ptr_t * Rwt_ManReadLeaves( Rwt_Man_t * p ); +extern int Rwt_ManReadCompl( Rwt_Man_t * p ); +extern void Rwt_ManAddTimeCuts( Rwt_Man_t * p, int Time ); +extern void Rwt_ManAddTimeUpdate( Rwt_Man_t * p, int Time ); +extern void Rwt_ManAddTimeTotal( Rwt_Man_t * p, int Time ); +/*=== rwrUtil.c ========================================================*/ +extern void Rwt_ManLoadFromArray( Rwt_Man_t * p, int fVerbose ); +extern char * Rwt_ManGetPractical( Rwt_Man_t * p ); +extern Rwt_Node_t * Rwt_ManAddVar( Rwt_Man_t * p, unsigned uTruth, int fPrecompute ); +extern void Rwt_ManIncTravId( Rwt_Man_t * p ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/rwt/rwtDec.c b/src/aig/rwt/rwtDec.c new file mode 100644 index 00000000..98019629 --- /dev/null +++ b/src/aig/rwt/rwtDec.c @@ -0,0 +1,150 @@ +/**CFile**************************************************************** + + FileName [rwtDec.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting package.] + + Synopsis [Evaluation and decomposition procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: rwtDec.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "rwt.h" +#include "deco.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Dec_Graph_t * Rwt_NodePreprocess( Rwt_Man_t * p, Rwt_Node_t * pNode ); +static Dec_Edge_t Rwt_TravCollect_rec( Rwt_Man_t * p, Rwt_Node_t * pNode, Dec_Graph_t * pGraph ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Preprocesses computed library of subgraphs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManPreprocess( Rwt_Man_t * p ) +{ + Dec_Graph_t * pGraph; + Rwt_Node_t * pNode; + int i, k; + // put the nodes into the structure + p->pMapInv = ALLOC( unsigned short, 222 ); + memset( p->pMapInv, 0, sizeof(unsigned short) * 222 ); + p->vClasses = Vec_VecStart( 222 ); + for ( i = 0; i < p->nFuncs; i++ ) + { + if ( p->pTable[i] == NULL ) + continue; + // consider all implementations of this function + for ( pNode = p->pTable[i]; pNode; pNode = pNode->pNext ) + { + assert( pNode->uTruth == p->pTable[i]->uTruth ); + assert( p->pMap[pNode->uTruth] >= 0 && p->pMap[pNode->uTruth] < 222 ); + Vec_VecPush( p->vClasses, p->pMap[pNode->uTruth], pNode ); + p->pMapInv[ p->pMap[pNode->uTruth] ] = p->puCanons[pNode->uTruth]; + } + } + // compute decomposition forms for each node and verify them + Vec_VecForEachEntry( p->vClasses, pNode, i, k ) + { + pGraph = Rwt_NodePreprocess( p, pNode ); + pNode->pNext = (Rwt_Node_t *)pGraph; +// assert( pNode->uTruth == (Dec_GraphDeriveTruth(pGraph) & 0xFFFF) ); + } +} + +/**Function************************************************************* + + Synopsis [Preprocesses subgraphs rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dec_Graph_t * Rwt_NodePreprocess( Rwt_Man_t * p, Rwt_Node_t * pNode ) +{ + Dec_Graph_t * pGraph; + Dec_Edge_t eRoot; + assert( !Rwt_IsComplement(pNode) ); + // consider constant + if ( pNode->uTruth == 0 ) + return Dec_GraphCreateConst0(); + // consider the case of elementary var + if ( pNode->uTruth == 0x00FF ) + return Dec_GraphCreateLeaf( 3, 4, 1 ); + // start the subgraphs + pGraph = Dec_GraphCreate( 4 ); + // collect the nodes + Rwt_ManIncTravId( p ); + eRoot = Rwt_TravCollect_rec( p, pNode, pGraph ); + Dec_GraphSetRoot( pGraph, eRoot ); + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dec_Edge_t Rwt_TravCollect_rec( Rwt_Man_t * p, Rwt_Node_t * pNode, Dec_Graph_t * pGraph ) +{ + Dec_Edge_t eNode0, eNode1, eNode; + // elementary variable + if ( pNode->fUsed ) + return Dec_EdgeCreate( pNode->Id - 1, 0 ); + // previously visited node + if ( pNode->TravId == p->nTravIds ) + return Dec_IntToEdge( pNode->Volume ); + pNode->TravId = p->nTravIds; + // solve for children + eNode0 = Rwt_TravCollect_rec( p, Rwt_Regular(pNode->p0), pGraph ); + if ( Rwt_IsComplement(pNode->p0) ) + eNode0.fCompl = !eNode0.fCompl; + eNode1 = Rwt_TravCollect_rec( p, Rwt_Regular(pNode->p1), pGraph ); + if ( Rwt_IsComplement(pNode->p1) ) + eNode1.fCompl = !eNode1.fCompl; + // create the decomposition node(s) + if ( pNode->fExor ) + eNode = Dec_GraphAddNodeXor( pGraph, eNode0, eNode1, 0 ); + else + eNode = Dec_GraphAddNodeAnd( pGraph, eNode0, eNode1 ); + // save the result + pNode->Volume = Dec_EdgeToInt( eNode ); + return eNode; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/rwt/rwtMan.c b/src/aig/rwt/rwtMan.c new file mode 100644 index 00000000..869043a4 --- /dev/null +++ b/src/aig/rwt/rwtMan.c @@ -0,0 +1,358 @@ +/**CFile**************************************************************** + + FileName [rwtMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting package.] + + Synopsis [Rewriting manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: rwtMan.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "rwt.h" +#include "deco.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static unsigned short * s_puCanons = NULL; +static char * s_pPhases = NULL; +static char * s_pPerms = NULL; +static unsigned char * s_pMap = NULL; + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts residual rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManGlobalStart() +{ + if ( s_puCanons == NULL ) + Extra_Truth4VarNPN( &s_puCanons, &s_pPhases, &s_pPerms, &s_pMap ); +} + +/**Function************************************************************* + + Synopsis [Starts residual rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManGlobalStop() +{ + FREE( s_puCanons ); + FREE( s_pPhases ); + FREE( s_pPerms ); + FREE( s_pMap ); +} + +/**Function************************************************************* + + Synopsis [Starts rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rwt_Man_t * Rwt_ManStart( int fPrecompute ) +{ + Rwt_Man_t * p; + int clk = clock(); +clk = clock(); + p = ALLOC( Rwt_Man_t, 1 ); + memset( p, 0, sizeof(Rwt_Man_t) ); + p->nFuncs = (1<<16); + // copy the global tables + Rwt_ManGlobalStart(); + p->puCanons = s_puCanons; + p->pPhases = s_pPhases; + p->pPerms = s_pPerms; + p->pMap = s_pMap; + // initialize practical NPN classes + p->pPractical = Rwt_ManGetPractical( p ); + // create the table + p->pTable = ALLOC( Rwt_Node_t *, p->nFuncs ); + memset( p->pTable, 0, sizeof(Rwt_Node_t *) * p->nFuncs ); + // create the elementary nodes + p->pMmNode = Mem_FixedStart( sizeof(Rwt_Node_t) ); + p->vForest = Vec_PtrAlloc( 100 ); + Rwt_ManAddVar( p, 0x0000, fPrecompute ); // constant 0 + Rwt_ManAddVar( p, 0xAAAA, fPrecompute ); // var A + Rwt_ManAddVar( p, 0xCCCC, fPrecompute ); // var B + Rwt_ManAddVar( p, 0xF0F0, fPrecompute ); // var C + Rwt_ManAddVar( p, 0xFF00, fPrecompute ); // var D + p->nClasses = 5; + // other stuff + p->nTravIds = 1; + p->pPerms4 = Extra_Permutations( 4 ); + p->vLevNums = Vec_IntAlloc( 50 ); + p->vFanins = Vec_PtrAlloc( 50 ); + p->vFaninsCur = Vec_PtrAlloc( 50 ); + p->vNodesTemp = Vec_PtrAlloc( 50 ); + if ( fPrecompute ) + { // precompute subgraphs +// Rwt_ManPrecompute( p ); +// Rwt_ManPrint( p ); +// Rwt_ManWriteToArray( p ); + } + else + { // load saved subgraphs + Rwt_ManLoadFromArray( p, 0 ); +// Rwt_ManPrint( p ); + Rwt_ManPreprocess( p ); + } +p->timeStart = clock() - clk; + return p; +} + +/**Function************************************************************* + + Synopsis [Stops rewriting manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManStop( Rwt_Man_t * p ) +{ + if ( p->vClasses ) + { + Rwt_Node_t * pNode; + int i, k; + Vec_VecForEachEntry( p->vClasses, pNode, i, k ) + Dec_GraphFree( (Dec_Graph_t *)pNode->pNext ); + } + if ( p->vClasses ) Vec_VecFree( p->vClasses ); + Vec_PtrFree( p->vNodesTemp ); + Vec_PtrFree( p->vForest ); + Vec_IntFree( p->vLevNums ); + Vec_PtrFree( p->vFanins ); + Vec_PtrFree( p->vFaninsCur ); + Mem_FixedStop( p->pMmNode, 0 ); + FREE( p->pMapInv ); + free( p->pTable ); + free( p->pPractical ); + free( p->pPerms4 ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManPrintStats( Rwt_Man_t * p ) +{ + int i, Counter = 0; + for ( i = 0; i < 222; i++ ) + Counter += (p->nScores[i] > 0); + + printf( "Rewriting statistics:\n" ); + printf( "Total cuts tries = %8d.\n", p->nCutsGood ); + printf( "Bad cuts found = %8d.\n", p->nCutsBad ); + printf( "Total subgraphs = %8d.\n", p->nSubgraphs ); + printf( "Used NPN classes = %8d.\n", Counter ); + printf( "Nodes considered = %8d.\n", p->nNodesConsidered ); + printf( "Nodes rewritten = %8d.\n", p->nNodesRewritten ); + printf( "Calculated gain = %8d.\n", p->nNodesGained ); + PRT( "Start ", p->timeStart ); + PRT( "Cuts ", p->timeCut ); + PRT( "Truth ", p->timeTruth ); + PRT( "Resynthesis ", p->timeRes ); + PRT( " Mffc ", p->timeMffc ); + PRT( " Eval ", p->timeEval ); + PRT( "Update ", p->timeUpdate ); + PRT( "TOTAL ", p->timeTotal ); + +/* + printf( "The scores are:\n" ); + for ( i = 0; i < 222; i++ ) + if ( p->nScores[i] > 0 ) + { + extern void Ivy_TruthDsdComputePrint( unsigned uTruth ); + printf( "%3d = %8d canon = %5d ", i, p->nScores[i], p->pMapInv[i] ); + Ivy_TruthDsdComputePrint( (unsigned)p->pMapInv[i] | ((unsigned)p->pMapInv[i] << 16) ); + } + printf( "\n" ); +*/ +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManPrintStatsFile( Rwt_Man_t * p ) +{ + FILE * pTable; + pTable = fopen( "stats.txt", "a+" ); + fprintf( pTable, "%d ", p->nCutsGood ); + fprintf( pTable, "%d ", p->nSubgraphs ); + fprintf( pTable, "%d ", p->nNodesRewritten ); + fprintf( pTable, "%d", p->nNodesGained ); + fprintf( pTable, "\n" ); + fclose( pTable ); +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void * Rwt_ManReadDecs( Rwt_Man_t * p ) +{ + return p->pGraph; +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Rwt_ManReadLeaves( Rwt_Man_t * p ) +{ + return p->vFanins; +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rwt_ManReadCompl( Rwt_Man_t * p ) +{ + return p->fCompl; +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManAddTimeCuts( Rwt_Man_t * p, int Time ) +{ + p->timeCut += Time; +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManAddTimeUpdate( Rwt_Man_t * p, int Time ) +{ + p->timeUpdate += Time; +} + +/**Function************************************************************* + + Synopsis [Stops the resynthesis manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManAddTimeTotal( Rwt_Man_t * p, int Time ) +{ + p->timeTotal += Time; +} + + +/**Function************************************************************* + + Synopsis [Precomputes AIG subgraphs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_Precompute() +{ + Rwt_Man_t * p; + p = Rwt_ManStart( 1 ); + Rwt_ManStop( p ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/rwt/rwtUtil.c b/src/aig/rwt/rwtUtil.c new file mode 100644 index 00000000..af3e1893 --- /dev/null +++ b/src/aig/rwt/rwtUtil.c @@ -0,0 +1,665 @@ +/**CFile**************************************************************** + + FileName [rwtUtil.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting package.] + + Synopsis [Various utilities.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: rwtUtil.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "rwt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// precomputed data +#ifdef _WIN32 +unsigned short s_RwtPracticalClasses[]; +unsigned short s_RwtAigSubgraphs[]; +#else +static unsigned short s_RwtPracticalClasses[]; +static unsigned short s_RwtAigSubgraphs[]; +#endif + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Adds the node to the end of the list.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ListAddToTail( Rwt_Node_t ** ppList, Rwt_Node_t * pNode ) +{ + Rwt_Node_t * pTemp; + // find the last one + for ( pTemp = *ppList; pTemp; pTemp = pTemp->pNext ) + ppList = &pTemp->pNext; + // attach at the end + *ppList = pNode; +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rwt_Node_t * Rwt_ManAddVar( Rwt_Man_t * p, unsigned uTruth, int fPrecompute ) +{ + Rwt_Node_t * pNew; + pNew = (Rwt_Node_t *)Mem_FixedEntryFetch( p->pMmNode ); + pNew->Id = p->vForest->nSize; + pNew->TravId = 0; + pNew->uTruth = uTruth; + pNew->Level = 0; + pNew->Volume = 0; + pNew->fUsed = 1; + pNew->fExor = 0; + pNew->p0 = NULL; + pNew->p1 = NULL; + pNew->pNext = NULL; + Vec_PtrPush( p->vForest, pNew ); + if ( fPrecompute ) + Rwt_ListAddToTail( p->pTable + uTruth, pNew ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Rwt_Node_t * Rwt_ManAddNode( Rwt_Man_t * p, Rwt_Node_t * p0, Rwt_Node_t * p1, int fExor, int Level, int Volume ) +{ + Rwt_Node_t * pNew; + unsigned uTruth; + // compute truth table, leve, volume + p->nConsidered++; + if ( fExor ) + uTruth = (p0->uTruth ^ p1->uTruth); + else + uTruth = (Rwt_IsComplement(p0)? ~Rwt_Regular(p0)->uTruth : Rwt_Regular(p0)->uTruth) & + (Rwt_IsComplement(p1)? ~Rwt_Regular(p1)->uTruth : Rwt_Regular(p1)->uTruth) & 0xFFFF; + // create the new node + pNew = (Rwt_Node_t *)Mem_FixedEntryFetch( p->pMmNode ); + pNew->Id = p->vForest->nSize; + pNew->TravId = 0; + pNew->uTruth = uTruth; + pNew->Level = Level; + pNew->Volume = Volume; + pNew->fUsed = 0; + pNew->fExor = fExor; + pNew->p0 = p0; + pNew->p1 = p1; + pNew->pNext = NULL; + Vec_PtrPush( p->vForest, pNew ); + // do not add if the node is not essential + if ( uTruth != p->puCanons[uTruth] ) + return pNew; + + // add to the list + p->nAdded++; + if ( p->pTable[uTruth] == NULL ) + p->nClasses++; + Rwt_ListAddToTail( p->pTable + uTruth, pNew ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_Trav_rec( Rwt_Man_t * p, Rwt_Node_t * pNode, int * pVolume ) +{ + if ( pNode->fUsed || pNode->TravId == p->nTravIds ) + return; + pNode->TravId = p->nTravIds; + (*pVolume)++; + if ( pNode->fExor ) + (*pVolume)++; + Rwt_Trav_rec( p, Rwt_Regular(pNode->p0), pVolume ); + Rwt_Trav_rec( p, Rwt_Regular(pNode->p1), pVolume ); +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManIncTravId( Rwt_Man_t * p ) +{ + Rwt_Node_t * pNode; + int i; + if ( p->nTravIds++ < 0x8FFFFFFF ) + return; + Vec_PtrForEachEntry( p->vForest, pNode, i ) + pNode->TravId = 0; + p->nTravIds = 1; +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Rwt_ManNodeVolume( Rwt_Man_t * p, Rwt_Node_t * p0, Rwt_Node_t * p1 ) +{ + int Volume = 0; + Rwt_ManIncTravId( p ); + Rwt_Trav_rec( p, p0, &Volume ); + Rwt_Trav_rec( p, p1, &Volume ); + return Volume; +} + +/**Function************************************************************* + + Synopsis [Loads data.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManLoadFromArray( Rwt_Man_t * p, int fVerbose ) +{ + unsigned short * pArray = s_RwtAigSubgraphs; + Rwt_Node_t * p0, * p1; + unsigned Entry0, Entry1; + int Level, Volume, nEntries, fExor; + int i, clk = clock(); + + // reconstruct the forest + for ( i = 0; ; i++ ) + { + Entry0 = pArray[2*i + 0]; + Entry1 = pArray[2*i + 1]; + if ( Entry0 == 0 && Entry1 == 0 ) + break; + // get EXOR flag + fExor = (Entry0 & 1); + Entry0 >>= 1; + // get the nodes + p0 = p->vForest->pArray[Entry0 >> 1]; + p1 = p->vForest->pArray[Entry1 >> 1]; + // compute the level and volume of the new nodes + Level = 1 + RWT_MAX( p0->Level, p1->Level ); + Volume = 1 + Rwt_ManNodeVolume( p, p0, p1 ); + // set the complemented attributes + p0 = Rwt_NotCond( p0, (Entry0 & 1) ); + p1 = Rwt_NotCond( p1, (Entry1 & 1) ); + // add the node +// Rwt_ManTryNode( p, p0, p1, Level, Volume ); + Rwt_ManAddNode( p, p0, p1, fExor, Level, Volume + fExor ); + } + nEntries = i - 1; + if ( fVerbose ) + { + printf( "The number of classes = %d. Canonical nodes = %d.\n", p->nClasses, p->nAdded ); + printf( "The number of nodes loaded = %d. ", nEntries ); PRT( "Loading", clock() - clk ); + } +} + +/**Function************************************************************* + + Synopsis [Create practical classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +char * Rwt_ManGetPractical( Rwt_Man_t * p ) +{ + char * pPractical; + int i; + pPractical = ALLOC( char, p->nFuncs ); + memset( pPractical, 0, sizeof(char) * p->nFuncs ); + pPractical[0] = 1; + for ( i = 1; ; i++ ) + { + if ( s_RwtPracticalClasses[i] == 0 ) + break; + pPractical[ s_RwtPracticalClasses[i] ] = 1; + } + return pPractical; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + +// the following 135 practical NPN classes of 4-variable functions were computed +// by considering all 4-input cuts appearing in IWLS, MCNC, and ISCAS benchmarks +static unsigned short s_RwtPracticalClasses[] = +{ + 0x0000, 0x0001, 0x0003, 0x0006, 0x0007, 0x000f, 0x0016, 0x0017, 0x0018, 0x0019, 0x001b, + 0x001e, 0x001f, 0x003c, 0x003d, 0x003f, 0x0069, 0x006b, 0x006f, 0x007e, 0x007f, 0x00ff, + 0x0116, 0x0118, 0x0119, 0x011a, 0x011b, 0x011e, 0x011f, 0x012c, 0x012d, 0x012f, 0x013c, + 0x013d, 0x013e, 0x013f, 0x0168, 0x0169, 0x016f, 0x017f, 0x0180, 0x0181, 0x0182, 0x0183, + 0x0186, 0x0189, 0x018b, 0x018f, 0x0198, 0x0199, 0x019b, 0x01a8, 0x01a9, 0x01aa, 0x01ab, + 0x01ac, 0x01ad, 0x01ae, 0x01af, 0x01bf, 0x01e9, 0x01ea, 0x01eb, 0x01ee, 0x01ef, 0x01fe, + 0x033c, 0x033d, 0x033f, 0x0356, 0x0357, 0x0358, 0x0359, 0x035a, 0x035b, 0x035f, 0x0368, + 0x0369, 0x036c, 0x036e, 0x037d, 0x03c0, 0x03c1, 0x03c3, 0x03c7, 0x03cf, 0x03d4, 0x03d5, + 0x03d7, 0x03d8, 0x03d9, 0x03dc, 0x03dd, 0x03de, 0x03fc, 0x0660, 0x0661, 0x0666, 0x0669, + 0x066f, 0x0676, 0x067e, 0x0690, 0x0696, 0x0697, 0x069f, 0x06b1, 0x06b6, 0x06f0, 0x06f2, + 0x06f6, 0x06f9, 0x0776, 0x0778, 0x07b0, 0x07b1, 0x07b4, 0x07bc, 0x07f0, 0x07f2, 0x07f8, + 0x0ff0, 0x1683, 0x1696, 0x1698, 0x169e, 0x16e9, 0x178e, 0x17e8, 0x18e7, 0x19e6, 0x1be4, + 0x1ee1, 0x3cc3, 0x6996, 0x0000 +}; + +static unsigned short s_RwtAigSubgraphs[] = +{ + 0x0008,0x0002, 0x000a,0x0002, 0x0008,0x0003, 0x000a,0x0003, 0x0009,0x0002, + 0x000c,0x0002, 0x000e,0x0002, 0x000c,0x0003, 0x000e,0x0003, 0x000d,0x0002, + 0x000c,0x0004, 0x000e,0x0004, 0x000c,0x0005, 0x000e,0x0005, 0x000d,0x0004, + 0x0010,0x0002, 0x0012,0x0002, 0x0010,0x0003, 0x0012,0x0003, 0x0011,0x0002, + 0x0010,0x0004, 0x0012,0x0004, 0x0010,0x0005, 0x0012,0x0005, 0x0011,0x0004, + 0x0010,0x0006, 0x0012,0x0006, 0x0010,0x0007, 0x0012,0x0007, 0x0011,0x0006, + 0x0016,0x0005, 0x0014,0x0006, 0x0016,0x0006, 0x0014,0x0007, 0x0016,0x0007, + 0x0015,0x0006, 0x0014,0x0008, 0x0016,0x0008, 0x0014,0x0009, 0x0016,0x0009, + 0x0015,0x0008, 0x0018,0x0006, 0x001a,0x0006, 0x0018,0x0007, 0x001a,0x0007, + 0x0019,0x0006, 0x0018,0x0009, 0x001a,0x0009, 0x0019,0x0008, 0x001e,0x0005, + 0x001c,0x0006, 0x001e,0x0006, 0x001c,0x0007, 0x001e,0x0007, 0x001d,0x0006, + 0x001c,0x0008, 0x001e,0x0008, 0x001c,0x0009, 0x001e,0x0009, 0x001d,0x0008, + 0x0020,0x0006, 0x0022,0x0006, 0x0020,0x0007, 0x0022,0x0007, 0x0021,0x0006, + 0x0020,0x0008, 0x0022,0x0008, 0x0020,0x0009, 0x0022,0x0009, 0x0021,0x0008, + 0x0024,0x0006, 0x0026,0x0006, 0x0024,0x0007, 0x0026,0x0007, 0x0025,0x0006, + 0x0026,0x0008, 0x0024,0x0009, 0x0026,0x0009, 0x0025,0x0008, 0x0028,0x0004, + 0x002a,0x0004, 0x0028,0x0005, 0x002a,0x0007, 0x0028,0x0008, 0x002a,0x0009, + 0x0029,0x0008, 0x002a,0x000b, 0x0029,0x000a, 0x002a,0x000f, 0x0029,0x000e, + 0x002a,0x0011, 0x002a,0x0013, 0x002c,0x0004, 0x002e,0x0004, 0x002c,0x0005, + 0x002c,0x0009, 0x002e,0x0009, 0x002d,0x0008, 0x002d,0x000c, 0x002e,0x000f, + 0x002e,0x0011, 0x002e,0x0012, 0x0030,0x0004, 0x0032,0x0007, 0x0032,0x0009, + 0x0031,0x0008, 0x0032,0x000b, 0x0032,0x000d, 0x0032,0x000f, 0x0031,0x000e, + 0x0032,0x0013, 0x0034,0x0004, 0x0036,0x0004, 0x0034,0x0005, 0x0036,0x0005, + 0x0035,0x0004, 0x0036,0x0008, 0x0034,0x0009, 0x0036,0x0009, 0x0035,0x0008, + 0x0036,0x000b, 0x0036,0x000d, 0x0036,0x0011, 0x0035,0x0010, 0x0036,0x0013, + 0x0038,0x0004, 0x0039,0x0004, 0x0038,0x0009, 0x003a,0x0009, 0x0039,0x0008, + 0x0038,0x000b, 0x003a,0x000b, 0x003a,0x000d, 0x003a,0x0011, 0x003a,0x0012, + 0x0038,0x0013, 0x003a,0x0013, 0x003c,0x0002, 0x003e,0x0002, 0x003c,0x0003, + 0x003e,0x0005, 0x003e,0x0007, 0x003c,0x0008, 0x003e,0x0008, 0x003c,0x0009, + 0x003e,0x0009, 0x003d,0x0008, 0x003e,0x000d, 0x003e,0x0011, 0x003e,0x0013, + 0x003e,0x0017, 0x003e,0x001b, 0x003e,0x001d, 0x0040,0x0002, 0x0042,0x0002, + 0x0042,0x0005, 0x0041,0x0006, 0x0042,0x0008, 0x0041,0x0008, 0x0042,0x000d, + 0x0042,0x0011, 0x0042,0x0015, 0x0042,0x0019, 0x0042,0x001b, 0x0042,0x001c, + 0x0041,0x001c, 0x0044,0x0002, 0x0046,0x0003, 0x0045,0x0004, 0x0046,0x0007, + 0x0045,0x0008, 0x0046,0x000b, 0x0046,0x000f, 0x0046,0x0013, 0x0045,0x0012, + 0x0046,0x0017, 0x0046,0x001b, 0x0046,0x0021, 0x0048,0x0002, 0x004a,0x0002, + 0x0048,0x0003, 0x004a,0x0003, 0x0049,0x0002, 0x0048,0x0008, 0x004a,0x0008, + 0x0048,0x0009, 0x004a,0x0009, 0x0049,0x0008, 0x004a,0x000b, 0x004a,0x000f, + 0x004a,0x0011, 0x004a,0x0012, 0x004a,0x0013, 0x004a,0x0015, 0x004a,0x0019, + 0x004a,0x001b, 0x004a,0x001d, 0x004c,0x0002, 0x004c,0x0003, 0x004d,0x0002, + 0x004c,0x0008, 0x004e,0x0008, 0x004c,0x0009, 0x004e,0x0009, 0x004d,0x0008, + 0x004c,0x000b, 0x004e,0x000b, 0x004c,0x000f, 0x004e,0x000f, 0x004e,0x0011, + 0x004c,0x0012, 0x004c,0x0013, 0x004e,0x0013, 0x004e,0x0015, 0x004c,0x0017, + 0x004e,0x0019, 0x004c,0x001b, 0x004e,0x001b, 0x004c,0x001c, 0x004c,0x001d, + 0x004e,0x001d, 0x0050,0x0004, 0x0052,0x0004, 0x0050,0x0006, 0x0052,0x0009, + 0x0052,0x000d, 0x0052,0x000f, 0x0052,0x0013, 0x0052,0x0017, 0x0052,0x0019, + 0x0052,0x001d, 0x0052,0x001f, 0x0052,0x0021, 0x0052,0x0023, 0x0052,0x0024, + 0x0052,0x0025, 0x0051,0x0024, 0x0052,0x0027, 0x0054,0x0004, 0x0056,0x0004, + 0x0054,0x0005, 0x0056,0x0006, 0x0054,0x0007, 0x0056,0x0011, 0x0056,0x001b, + 0x0056,0x001e, 0x0054,0x001f, 0x0056,0x001f, 0x0056,0x0020, 0x0054,0x0021, + 0x0055,0x0020, 0x0056,0x0024, 0x0054,0x0025, 0x0056,0x0025, 0x0055,0x0024, + 0x0054,0x0027, 0x0056,0x0027, 0x0055,0x0026, 0x005a,0x0007, 0x005a,0x0009, + 0x005a,0x000b, 0x005a,0x0015, 0x005a,0x001f, 0x0059,0x0020, 0x0058,0x0024, + 0x005a,0x0024, 0x005a,0x0027, 0x0059,0x0026, 0x005c,0x0004, 0x005e,0x0004, + 0x005c,0x0005, 0x005e,0x0006, 0x005c,0x0007, 0x005d,0x0006, 0x005e,0x000d, + 0x005e,0x0013, 0x005e,0x0017, 0x005c,0x001f, 0x005d,0x001e, 0x005e,0x0020, + 0x005e,0x0021, 0x005e,0x0022, 0x005e,0x0023, 0x005c,0x0024, 0x005e,0x0024, + 0x005c,0x0025, 0x005e,0x0025, 0x005d,0x0024, 0x005e,0x0026, 0x005e,0x0027, + 0x0062,0x0004, 0x0061,0x0004, 0x0062,0x0006, 0x0061,0x0006, 0x0060,0x000f, + 0x0060,0x0013, 0x0062,0x0013, 0x0060,0x0019, 0x0062,0x001c, 0x0060,0x001d, + 0x0062,0x001d, 0x0062,0x001f, 0x0060,0x0021, 0x0060,0x0023, 0x0062,0x0024, + 0x0060,0x0027, 0x0061,0x0026, 0x0064,0x0002, 0x0066,0x0002, 0x0064,0x0006, + 0x0066,0x0007, 0x0066,0x0009, 0x0066,0x000d, 0x0066,0x0013, 0x0066,0x0015, + 0x0066,0x0017, 0x0066,0x0019, 0x0066,0x001a, 0x0065,0x001a, 0x0066,0x001f, + 0x0066,0x0023, 0x0066,0x0027, 0x0066,0x002f, 0x0066,0x0030, 0x006a,0x0002, + 0x0068,0x0003, 0x0068,0x0006, 0x006a,0x0006, 0x006a,0x0011, 0x0068,0x0016, + 0x0068,0x0017, 0x006a,0x0017, 0x006a,0x001a, 0x006a,0x001b, 0x006a,0x0025, + 0x006a,0x002d, 0x006e,0x0003, 0x006e,0x0007, 0x006e,0x0009, 0x006e,0x000b, + 0x006e,0x0015, 0x006e,0x0016, 0x006e,0x0017, 0x006c,0x001a, 0x006e,0x001a, + 0x006e,0x001f, 0x006e,0x002b, 0x006e,0x0035, 0x0070,0x0002, 0x0070,0x0003, + 0x0072,0x0006, 0x0070,0x0007, 0x0071,0x0006, 0x0072,0x000b, 0x0072,0x000f, + 0x0072,0x0013, 0x0070,0x0015, 0x0071,0x0014, 0x0072,0x0017, 0x0072,0x0018, + 0x0070,0x0019, 0x0072,0x0019, 0x0070,0x001a, 0x0070,0x001b, 0x0072,0x001b, + 0x0071,0x001a, 0x0072,0x0021, 0x0072,0x0029, 0x0076,0x0002, 0x0076,0x0003, + 0x0075,0x0002, 0x0076,0x0006, 0x0074,0x0007, 0x0076,0x0007, 0x0075,0x0006, + 0x0076,0x000d, 0x0076,0x0011, 0x0076,0x0013, 0x0075,0x0014, 0x0076,0x0019, + 0x0076,0x001a, 0x0076,0x001b, 0x0075,0x001c, 0x0074,0x0023, 0x0075,0x0022, + 0x0074,0x0026, 0x0076,0x0026, 0x0074,0x0027, 0x0076,0x002b, 0x0076,0x002f, + 0x0078,0x0002, 0x0078,0x0004, 0x007a,0x0004, 0x007a,0x0005, 0x0079,0x0004, + 0x007a,0x0009, 0x007a,0x000a, 0x007a,0x000b, 0x007a,0x000d, 0x007a,0x000f, + 0x007a,0x0010, 0x007a,0x0011, 0x007a,0x0012, 0x007a,0x0013, 0x007a,0x0017, + 0x007a,0x001b, 0x007a,0x0021, 0x007a,0x0027, 0x007a,0x002b, 0x007a,0x002f, + 0x007a,0x0030, 0x0079,0x0034, 0x007a,0x0039, 0x007a,0x003a, 0x007e,0x0002, + 0x007c,0x0004, 0x007e,0x0004, 0x007e,0x000c, 0x007c,0x000d, 0x007e,0x0011, + 0x007e,0x0013, 0x007e,0x001b, 0x007e,0x0025, 0x007e,0x002d, 0x007e,0x0037, + 0x0082,0x0003, 0x0082,0x0005, 0x0082,0x0009, 0x0082,0x000b, 0x0080,0x0010, + 0x0082,0x0010, 0x0082,0x0012, 0x0082,0x0015, 0x0082,0x001f, 0x0082,0x002b, + 0x0082,0x0035, 0x0082,0x0039, 0x0082,0x003f, 0x0084,0x0002, 0x0086,0x0002, + 0x0084,0x0003, 0x0086,0x0003, 0x0085,0x0002, 0x0086,0x0004, 0x0084,0x0005, + 0x0085,0x0004, 0x0086,0x000a, 0x0084,0x000b, 0x0085,0x000a, 0x0086,0x000d, + 0x0086,0x000e, 0x0086,0x000f, 0x0084,0x0010, 0x0084,0x0011, 0x0086,0x0011, + 0x0085,0x0010, 0x0084,0x0012, 0x0084,0x0013, 0x0086,0x0013, 0x0085,0x0012, + 0x0086,0x0019, 0x0086,0x0023, 0x0086,0x0029, 0x0086,0x0033, 0x0086,0x0039, + 0x008a,0x0003, 0x0089,0x0002, 0x0088,0x0004, 0x008a,0x0004, 0x0088,0x0005, + 0x0089,0x0004, 0x008a,0x000b, 0x008a,0x0010, 0x0088,0x0011, 0x008a,0x0011, + 0x0089,0x0010, 0x0088,0x0012, 0x008a,0x0012, 0x0089,0x0012, 0x008a,0x0017, + 0x008a,0x001b, 0x0089,0x0020, 0x008a,0x0025, 0x0088,0x0027, 0x008a,0x002b, + 0x008a,0x002f, 0x008a,0x0039, 0x0088,0x003a, 0x008d,0x0044, 0x0092,0x0009, + 0x0092,0x0025, 0x0092,0x0029, 0x0092,0x002d, 0x0092,0x0033, 0x0092,0x0037, + 0x0092,0x003d, 0x0092,0x0041, 0x0095,0x0002, 0x0095,0x0004, 0x0095,0x0010, + 0x0095,0x0012, 0x0096,0x0021, 0x0096,0x0029, 0x0095,0x002e, 0x0096,0x0030, + 0x0096,0x0033, 0x0096,0x003a, 0x0096,0x0043, 0x009a,0x0008, 0x009a,0x0009, + 0x0099,0x0008, 0x009a,0x0011, 0x009a,0x0023, 0x009a,0x0033, 0x009a,0x003d, + 0x009a,0x0044, 0x009a,0x0045, 0x0099,0x0044, 0x009d,0x0002, 0x009e,0x0008, + 0x009c,0x0009, 0x009e,0x0009, 0x009d,0x0008, 0x009e,0x0011, 0x009d,0x0010, + 0x009e,0x001f, 0x009e,0x003f, 0x00a0,0x0009, 0x00a0,0x0011, 0x00a2,0x0030, + 0x00a2,0x0033, 0x00a6,0x0006, 0x00a6,0x0007, 0x00a6,0x0011, 0x00a6,0x0044, + 0x00a6,0x004b, 0x00aa,0x0007, 0x00aa,0x0015, 0x00ae,0x0006, 0x00ae,0x0011, + 0x00ae,0x001b, 0x00ae,0x0025, 0x00ae,0x003d, 0x00ae,0x0041, 0x00ae,0x0043, + 0x00ae,0x0045, 0x00b2,0x0006, 0x00b0,0x0007, 0x00b1,0x0006, 0x00b2,0x0017, + 0x00b1,0x0016, 0x00b0,0x0019, 0x00b2,0x0021, 0x00b2,0x003d, 0x00b5,0x004a, + 0x00ba,0x0009, 0x00ba,0x000f, 0x00bc,0x0009, 0x00be,0x0009, 0x00be,0x000f, + 0x00bd,0x000e, 0x00be,0x0017, 0x00c2,0x0009, 0x00c2,0x0019, 0x00c2,0x001f, + 0x00c2,0x0033, 0x00c6,0x0009, 0x00c5,0x000e, 0x00c6,0x0015, 0x00c6,0x0023, + 0x00c4,0x002d, 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