diff options
Diffstat (limited to 'src/aig')
-rw-r--r-- | src/aig/cnf/cnf.h | 148 | ||||
-rw-r--r-- | src/aig/cnf/cnfCore.c | 101 | ||||
-rw-r--r-- | src/aig/cnf/cnfCut.c | 371 | ||||
-rw-r--r-- | src/aig/cnf/cnfData.c (renamed from src/aig/dar/darData2.c) | 11 | ||||
-rw-r--r-- | src/aig/cnf/cnfMan.c | 173 | ||||
-rw-r--r-- | src/aig/cnf/cnfMap.c | 271 | ||||
-rw-r--r-- | src/aig/cnf/cnfPost.c | 225 | ||||
-rw-r--r-- | src/aig/cnf/cnfUtil.c | 157 | ||||
-rw-r--r-- | src/aig/cnf/cnfWrite.c | 337 | ||||
-rw-r--r-- | src/aig/cnf/cnf_.c | 48 | ||||
-rw-r--r-- | src/aig/cnf/module.make | 8 | ||||
-rw-r--r-- | src/aig/dar/dar.h | 25 | ||||
-rw-r--r-- | src/aig/dar/darCnf.c | 679 | ||||
-rw-r--r-- | src/aig/dar/darCore.c | 5 | ||||
-rw-r--r-- | src/aig/dar/darCut.c | 32 | ||||
-rw-r--r-- | src/aig/dar/darLib.c | 12 | ||||
-rw-r--r-- | src/aig/dar/darMan.c | 72 | ||||
-rw-r--r-- | src/aig/fra/fra.h | 196 | ||||
-rw-r--r-- | src/aig/fra/fraAnd.c | 138 | ||||
-rw-r--r-- | src/aig/fra/fraClass.c | 394 | ||||
-rw-r--r-- | src/aig/fra/fraCnf.c | 285 | ||||
-rw-r--r-- | src/aig/fra/fraCore.c | 64 | ||||
-rw-r--r-- | src/aig/fra/fraMan.c | 188 | ||||
-rw-r--r-- | src/aig/fra/fraSat.c | 328 | ||||
-rw-r--r-- | src/aig/fra/fraSim.c | 599 | ||||
-rw-r--r-- | src/aig/fra/fra_.c | 48 | ||||
-rw-r--r-- | src/aig/fra/ivyFraig.c | 2750 | ||||
-rw-r--r-- | src/aig/fra/module.make | 7 |
28 files changed, 6953 insertions, 719 deletions
diff --git a/src/aig/cnf/cnf.h b/src/aig/cnf/cnf.h new file mode 100644 index 00000000..8c27b62d --- /dev/null +++ b/src/aig/cnf/cnf.h @@ -0,0 +1,148 @@ +/**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 "dar.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_ +{ + Dar_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_ +{ + Dar_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 + Dar_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 +}; + +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( Dar_Obj_t * pObj ) { return pObj->pData; } +static inline void Cnf_ObjSetBestCut( Dar_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) = Dar_ManObj(p, (pCut)->pFanins[i])); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== cnfCore.c ========================================================*/ +extern Cnf_Dat_t * Cnf_Derive( Cnf_Man_t * p, Dar_Man_t * pAig ); +/*=== cnfCut.c ========================================================*/ +extern Cnf_Cut_t * Cnf_CutCreate( Cnf_Man_t * p, Dar_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 void Cnf_DataFree( Cnf_Dat_t * p ); +extern void Cnf_DataWriteIntoFile( Cnf_Dat_t * p, char * pFileName ); +void * Cnf_DataWriteIntoSolver( Cnf_Dat_t * p ); +/*=== cnfMap.c ========================================================*/ +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 * Dar_ManScanMapping( Cnf_Man_t * p, int fCollect ); +extern Vec_Ptr_t * Cnf_ManScanMapping( Cnf_Man_t * p, int fCollect ); +/*=== 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 ); + +#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..b09f0bdc --- /dev/null +++ b/src/aig/cnf/cnfCore.c @@ -0,0 +1,101 @@ +/**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 /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Dat_t * Cnf_Derive( Cnf_Man_t * p, Dar_Man_t * pAig ) +{ + Cnf_Dat_t * pCnf = NULL; + Vec_Ptr_t * vMapped; + int nIters = 2; + int clk; + + // connect the managers + pAig->pManCnf = p; + p->pManAig = pAig; + + // generate cuts for all nodes, assign cost, and find best cuts +clk = clock(); + Dar_ManComputeCuts( pAig ); +PRT( "Cuts", clock() - clk ); +/* + // 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 = Dar_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; +*/ + return NULL; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfCut.c b/src/aig/cnf/cnfCut.c new file mode 100644 index 00000000..feeef1f2 --- /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) * Dar_TruthWordNum(nLeaves); + pCut = (Cnf_Cut_t *)Dar_MmFlexEntryFetch( p->pMemCuts, nSize ); + pCut->nFanins = nLeaves; + pCut->nWords = Dar_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, Dar_Obj_t * pObj ) +{ + Dar_Cut_t * pCutBest; + Cnf_Cut_t * pCut; + unsigned * pTruth; + assert( Dar_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 = p->pSopSizes[0xFFFF & *pTruth] + p->pSopSizes[0xFFFF & ~*pTruth]; + 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 ) +{ + Dar_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 ) +{ + Dar_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/dar/darData2.c b/src/aig/cnf/cnfData.c index 81607ee9..57ce9392 100644 --- a/src/aig/dar/darData2.c +++ b/src/aig/cnf/cnfData.c @@ -1,10 +1,10 @@ /**CFile**************************************************************** - FileName [dar_.c] + FileName [cnfData.c] SystemName [ABC: Logic synthesis and verification system.] - PackageName [DAG-aware AIG rewriting.] + PackageName [AIG-to-CNF conversion.] Synopsis [] @@ -14,11 +14,11 @@ Date [Ver. 1.0. Started - April 28, 2007.] - Revision [$Id: dar_.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] + Revision [$Id: cnfData.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] ***********************************************************************/ -#include "dar.h" +#include "cnf.h" //////////////////////////////////////////////////////////////////////// /// DECLARATIONS /// @@ -4531,7 +4531,7 @@ NULL SeeAlso [] ***********************************************************************/ -void Dar_LibReadMsops( char ** ppSopSizes, char *** ppSops ) +void Cnf_ReadMsops( char ** ppSopSizes, char *** ppSops ) { unsigned uMasks[4][2] = { { 0x5555, 0xAAAA }, @@ -4566,6 +4566,7 @@ void Dar_LibReadMsops( char ** ppSopSizes, char *** ppSops ) // set pointers and compute SOP sizes pSopSizes = ALLOC( char, 65536 ); pSops = ALLOC( char *, 65536 ); + pSopSizes[0] = 0; pSops[0] = NULL; pPrev = pMemory; for ( k = 0, i = 1; i < 65536; k++ ) diff --git a/src/aig/cnf/cnfMan.c b/src/aig/cnf/cnfMan.c new file mode 100644 index 00000000..d1d1fc21 --- /dev/null +++ b/src/aig/cnf/cnfMan.c @@ -0,0 +1,173 @@ +/**CFile**************************************************************** + + FileName [cnfMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [AIG-to-CNF conversion.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - April 28, 2007.] + + Revision [$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; } + +//////////////////////////////////////////////////////////////////////// +/// 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 = Dar_MmFlexStart(); + p->nMergeLimit = 10; + // allocate temporary truth tables + p->pTruths[0] = ALLOC( unsigned, 4 * Dar_TruthWordNum(p->nMergeLimit) ); + for ( i = 1; i < 4; i++ ) + p->pTruths[i] = p->pTruths[i-1] + Dar_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] ); + Dar_MmFlexStop( p->pMemCuts, 0 ); + free( p->pSopSizes ); + free( p->pSops[1] ); + free( p->pSops ); + free( p ); +} + +/**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 ) +{ + 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 ", 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; + 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; + } + } + 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..09be7701 --- /dev/null +++ b/src/aig/cnf/cnfMap.c @@ -0,0 +1,271 @@ +/**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 of the first level.] + + Description [The cut need to be derefed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dar_CutDeref( Dar_Man_t * p, Dar_Cut_t * pCut ) +{ + Dar_Obj_t * pLeaf; + int i; + Dar_CutForEachLeaf( p, pCut, pLeaf, i ) + { + assert( pLeaf->nRefs > 0 ); + if ( --pLeaf->nRefs > 0 || !Dar_ObjIsAnd(pLeaf) ) + continue; + Dar_CutDeref( p, Dar_ObjBestCut(pLeaf) ); + } +} + +/**Function************************************************************* + + Synopsis [Computes area of the first level.] + + Description [The cut need to be derefed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dar_CutRef( Dar_Man_t * p, Dar_Cut_t * pCut ) +{ + Dar_Obj_t * pLeaf; + int i, Area = pCut->Cost; + Dar_CutForEachLeaf( p, pCut, pLeaf, i ) + { + assert( pLeaf->nRefs >= 0 ); + if ( pLeaf->nRefs++ > 0 || !Dar_ObjIsAnd(pLeaf) ) + continue; + Area += Dar_CutRef( p, Dar_ObjBestCut(pLeaf) ); + } + return Area; +} + +/**Function************************************************************* + + Synopsis [Computes exact area of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_CutArea( Dar_Man_t * p, Dar_Cut_t * pCut ) +{ + int Area; + Area = Dar_CutRef( p, pCut ); + Dar_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( Dar_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_CutAssignAreaFlow( Cnf_Man_t * p, Dar_Cut_t * pCut ) +{ + Dar_Obj_t * pLeaf; + int i; + pCut->Cost = p->pSopSizes[pCut->uTruth] + p->pSopSizes[0xFFFF & ~pCut->uTruth]; + pCut->Area = (float)pCut->Cost; + pCut->NoRefs = 0; + pCut->FanRefs = 0; + Dar_CutForEachLeaf( p->pManAig, pCut, pLeaf, i ) + { + if ( !Dar_ObjIsNode(pLeaf) ) + continue; + if ( pLeaf->nRefs == 0 ) + { + pCut->Area += Dar_ObjBestCut(pLeaf)->Area; + pCut->NoRefs++; + } + else + { + pCut->Area += Dar_ObjBestCut(pLeaf)->Area / pLeaf->nRefs; + if ( pCut->FanRefs + pLeaf->nRefs > 15 ) + pCut->FanRefs = 15; + else + pCut->FanRefs += pLeaf->nRefs; + } + } +} + +/**Function************************************************************* + + Synopsis [Computes area flow of the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cnf_CutAssignArea( Cnf_Man_t * p, Dar_Cut_t * pCut ) +{ + Dar_Obj_t * pLeaf; + int i; + pCut->Area = (float)pCut->Cost; + pCut->NoRefs = 0; + pCut->FanRefs = 0; + Dar_CutForEachLeaf( p->pManAig, pCut, pLeaf, i ) + { + if ( !Dar_ObjIsNode(pLeaf) ) + continue; + if ( pLeaf->nRefs == 0 ) + { + pCut->Area += Dar_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 ) +{ + Dar_Obj_t * pObj; + Dar_Cut_t * pCut, * pCutBest; + int i, k; + // visit the nodes in the topological order and update their best cuts + Dar_ManForEachNode( p->pManAig, pObj, i ) + { + // find the old best cut + pCutBest = Dar_ObjBestCut(pObj); + Dar_ObjClearBestCut(pCutBest); + // if the node is used, dereference its cut + if ( pObj->nRefs ) + Dar_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 ) + Dar_CutRef( p->pManAig, pCutBest ); + } + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/cnf/cnfPost.c b/src/aig/cnf/cnfPost.c new file mode 100644 index 00000000..2f6a6424 --- /dev/null +++ b/src/aig/cnf/cnfPost.c @@ -0,0 +1,225 @@ +/**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 Dar_ManLargeCutEval( Dar_Man_t * p, Dar_Obj_t * pRoot, Dar_Cut_t * pCutR, Dar_Cut_t * pCutL, int Leaf ); + int nNew, Gain, nGain = 0, nVars = 0; + + Dar_Obj_t * pObj, * pFan; + Dar_Cut_t * pCutBest, * pCut; + int i, k;//, a, b, Counter; + Dar_ManForEachObj( p->pManAig, pObj, i ) + { + if ( !Dar_ObjIsNode(pObj) ) + continue; + if ( pObj->nRefs == 0 ) + continue; + pCutBest = Dar_ObjBestCut(pObj); + Dar_CutForEachLeaf( p->pManAig, pCutBest, pFan, k ) + { + if ( !Dar_ObjIsNode(pFan) ) + continue; + assert( pFan->nRefs != 0 ); + if ( pFan->nRefs != 1 ) + continue; + pCut = Dar_ObjBestCut(pFan); +/* + // 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 = Dar_ManLargeCutEval( p->pManAig, pObj, pCutBest, pCut, pFan->Id ); +// printf( "%d+%d=%d:%d(%d) ", pCutBest->Cost, pCut->Cost, +// pCutBest->Cost+pCut->Cost, nNew, pCutBest->Cost+pCut->Cost-nNew ); + + Gain = pCutBest->Cost+pCut->Cost-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 ) +{ + Dar_Obj_t * pObj; + int i; + Dar_MmFlexRestart( p->pMemCuts ); + Dar_ManForEachObj( p->pManAig, pObj, i ) + { + if ( Dar_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 ) +{ + Dar_Obj_t * pObj; + int i; + Dar_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; + Dar_Obj_t * pObj, * pFan; + int Order[16], Costs[16]; + int i, k, fChanges; + Dar_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] = Dar_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) = Dar_ManObj(p->pManAig, (pCut)->pFanins[Order[k]])); k++ ) + { + if ( !Dar_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..249f43fb --- /dev/null +++ b/src/aig/cnf/cnfUtil.c @@ -0,0 +1,157 @@ +/**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 Dar_ManScanMapping_rec( Cnf_Man_t * p, Dar_Obj_t * pObj, Vec_Ptr_t * vMapped ) +{ + Dar_Obj_t * pLeaf; + Dar_Cut_t * pCutBest; + int aArea, i; + if ( pObj->nRefs++ || Dar_ObjIsPi(pObj) || Dar_ObjIsConst1(pObj) ) + return 0; + assert( Dar_ObjIsAnd(pObj) ); + // collect the node first to derive pre-order + if ( vMapped ) + Vec_PtrPush( vMapped, pObj ); + // visit the transitive fanin of the selected cut + pCutBest = Dar_ObjBestCut(pObj); + aArea = pCutBest->Cost; + Dar_CutForEachLeaf( p->pManAig, pCutBest, pLeaf, i ) + aArea += Dar_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 * Dar_ManScanMapping( Cnf_Man_t * p, int fCollect ) +{ + Vec_Ptr_t * vMapped = NULL; + Dar_Obj_t * pObj; + int i; + // clean all references + Dar_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; + Dar_ManForEachPo( p->pManAig, pObj, i ) + p->aArea += Dar_ManScanMapping_rec( p, Dar_ObjFanin0(pObj), vMapped ); + printf( "Variables = %6d. Clauses = %8d.\n", vMapped? Vec_PtrSize(vMapped) : 0, p->aArea ); + return vMapped; +} + +/**Function************************************************************* + + Synopsis [Computes area, references, and nodes used in the mapping.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cnf_ManScanMapping_rec( Cnf_Man_t * p, Dar_Obj_t * pObj, Vec_Ptr_t * vMapped ) +{ + Dar_Obj_t * pLeaf; + Cnf_Cut_t * pCutBest; + int aArea, i; + if ( pObj->nRefs++ || Dar_ObjIsPi(pObj) || Dar_ObjIsConst1(pObj) ) + return 0; + assert( Dar_ObjIsAnd(pObj) ); + assert( pObj->pData != NULL ); + // visit the transitive fanin of the selected cut + pCutBest = pObj->pData; + assert( pCutBest->Cost < 127 ); + aArea = pCutBest->Cost; + Cnf_CutForEachLeaf( p->pManAig, pCutBest, pLeaf, i ) + aArea += Cnf_ManScanMapping_rec( p, pLeaf, vMapped ); + // collect the node first to derive pre-order + if ( vMapped ) + 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 ) +{ + Vec_Ptr_t * vMapped = NULL; + Dar_Obj_t * pObj; + int i; + // clean all references + Dar_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; + Dar_ManForEachPo( p->pManAig, pObj, i ) + p->aArea += Cnf_ManScanMapping_rec( p, Dar_ObjFanin0(pObj), vMapped ); + printf( "Variables = %6d. Clauses = %8d.\n", vMapped? Vec_PtrSize(vMapped) : 0, p->aArea ); + 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..2637d115 --- /dev/null +++ b/src/aig/cnf/cnfWrite.c @@ -0,0 +1,337 @@ +/**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_SopWriteCube( char Cube, int * pVars, int fCompl, int * pLiterals ) +{ + int nLits = 4, b; + for ( b = 0; b < 4; b++ ) + { + if ( Cube % 3 == 0 ) + *pLiterals++ = 2 * pVars[b] + !fCompl; + else if ( Cube % 3 == 1 ) + *pLiterals++ = 2 * pVars[b] + fCompl; + else + nLits--; + Cube = Cube / 3; + } + 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 fCompl, int * pLiterals ) +{ + int nLits = nVars, b; + for ( b = 0; b < nVars; b++ ) + { + if ( (Cube & 3) == 1 ) + *pLiterals++ = 2 * pVars[b] + !fCompl; + else if ( (Cube & 3) == 2 ) + *pLiterals++ = 2 * pVars[b] + fCompl; + else + nLits--; + Cube >>= 2; + } + return nLits; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cnf_Dat_t * Cnf_ManWriteCnf( Cnf_Man_t * p, Vec_Ptr_t * vMapped ) +{ + Dar_Obj_t * pObj; + Cnf_Dat_t * pCnf; + Cnf_Cut_t * pCut; + int OutVar, pVars[32], * pLits, ** pClas; + unsigned uTruth; + int i, k, nLiterals, nClauses, nCubes, Cube, Number; + + // count the number of literals and clauses + nLiterals = 1 + Dar_ManPoNum( p->pManAig ); + nClauses = 1 + Dar_ManPoNum( p->pManAig ); + Vec_PtrForEachEntry( vMapped, pObj, i ) + { + assert( Dar_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 + Dar_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; + + // set variable numbers + Number = 0; + pCnf->pVarNums = ALLOC( int, 1+Dar_ManObjIdMax(p->pManAig) ); + memset( pCnf->pVarNums, 0xff, sizeof(int) * (1+Dar_ManObjIdMax(p->pManAig)) ); + Vec_PtrForEachEntry( vMapped, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + Dar_ManForEachPi( p->pManAig, pObj, i ) + pCnf->pVarNums[pObj->Id] = Number++; + pCnf->pVarNums[Dar_ManConst1(p->pManAig)->Id] = Number++; + pCnf->nVars = Number; + + // assign the clauses + 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] <= Dar_ManObjIdMax(p->pManAig) ); + } + + // positive polarity of the cut + if ( pCut->nFanins < 5 ) + { + uTruth = 0xFFFF & *Cnf_CutTruth(pCut); + nCubes = p->pSopSizes[uTruth]; + for ( k = 0; k < nCubes; k++ ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar + 1; + pLits += Cnf_SopWriteCube( p->pSops[uTruth][k], pVars, 0, pLits ); + } + } + else + { + Vec_IntForEachEntry( pCut->vIsop[1], Cube, k ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar + 1; + pLits += Cnf_IsopWriteCube( Cube, pCut->nFanins, pVars, 0, pLits ); + } + } + + // negative polarity of the cut + if ( pCut->nFanins < 5 ) + { + uTruth = 0xFFFF & ~*Cnf_CutTruth(pCut); + nCubes = p->pSopSizes[uTruth]; + for ( k = 0; k < nCubes; k++ ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + pLits += Cnf_SopWriteCube( p->pSops[uTruth][k], pVars, 1, pLits ); + } + } + else + { + Vec_IntForEachEntry( pCut->vIsop[0], Cube, k ) + { + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + pLits += Cnf_IsopWriteCube( Cube, pCut->nFanins, pVars, 1, pLits ); + } + } +//printf( "%d ", pClas-pCnf->pClauses ); + } + + // write the constant literal + OutVar = pCnf->pVarNums[ Dar_ManConst1(p->pManAig)->Id ]; + assert( OutVar <= Dar_ManObjIdMax(p->pManAig) ); + *pClas++ = pLits; + *pLits++ = 2 * OutVar; + + // write the output literals + Dar_ManForEachPo( p->pManAig, pObj, i ) + { + OutVar = pCnf->pVarNums[ Dar_ObjFanin0(pObj)->Id ]; + *pClas++ = pLits; + *pLits++ = 2 * OutVar + Dar_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/dar/dar.h b/src/aig/dar/dar.h index f71470cf..9744da88 100644 --- a/src/aig/dar/dar.h +++ b/src/aig/dar/dar.h @@ -84,10 +84,11 @@ struct Dar_Cut_t_ // 8 words { unsigned uSign; unsigned uTruth : 16; // the truth table of the cut function - unsigned Cost : 6; // the cost of the cut in terms of CNF clauses + unsigned Cost : 5; // the cost of the cut in terms of CNF clauses unsigned FanRefs : 4; // the average number of fanin references unsigned NoRefs : 3; // the average number of fanin references unsigned nLeaves : 3; // the number of leaves + unsigned fBest : 1; // marks the best cut int pLeaves[4]; // the array of leaves // unsigned char pIndices[4]; float Area; // the area flow or exact area of the cut @@ -139,6 +140,7 @@ struct Dar_Man_t_ int nNodesInit; // the original number of nodes 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 @@ -146,6 +148,7 @@ struct Dar_Man_t_ 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 // various data members Dar_MmFixed_t * pMemObjs; // memory manager for objects Dar_MmFlex_t * pMemCuts; // memory manager for cuts @@ -155,9 +158,7 @@ struct Dar_Man_t_ int nTravIds; // the current traversal ID int fCatchExor; // enables EXOR nodes // CNF mapping - char * pSopSizes; // sizes of SOPs for 4-variable functions - char ** pSops; // the SOPs for 4-variable functions - int aArea; // the area of the mapping + void * pManCnf; // CNF conversion manager // rewriting statistics int nCutsBad; int nCutsGood; @@ -274,8 +275,16 @@ static inline int Dar_ObjFanoutC( Dar_Obj_t * pObj, Dar_Obj_t * pFanout if ( Dar_ObjFanin1(pFanout) == pObj ) return Dar_ObjFaninC1(pObj); assert(0); return -1; } -static inline Dar_Cut_t * Dar_ObjBestCut( Dar_Obj_t * pObj ) { return (Dar_Cut_t *)pObj->pNext; } -static inline void Dar_ObjSetBestCut( Dar_Obj_t * pObj, Dar_Cut_t * pCut ) { pObj->pNext = (Dar_Obj_t *)pCut; } +static inline Dar_Cut_t * Dar_ObjBestCut( Dar_Obj_t * pObj ) +{ + Dar_Cut_t * pCut; int i; + for ( pCut = pObj->pData, i = 0; i < (int)pObj->nCuts; i++, pCut++ ) + if ( pCut->fBest ) + return pCut; + return NULL; +} +static inline void Dar_ObjSetBestCut( Dar_Cut_t * pCut ) { assert( !pCut->fBest ); pCut->fBest = 1; } +static inline void Dar_ObjClearBestCut( Dar_Cut_t * pCut ) { assert( pCut->fBest ); pCut->fBest = 0; } // create the ghost of the new node static inline Dar_Obj_t * Dar_ObjCreateGhost( Dar_Man_t * p, Dar_Obj_t * p0, Dar_Obj_t * p1, Dar_Type_t Type ) @@ -333,6 +342,9 @@ static inline void Dar_ManRecycleMemory( Dar_Man_t * p, Dar_Obj_t * pEntry ) // iterator over all objects, including those currently not used #define Dar_ManForEachObj( p, pObj, i ) \ Vec_PtrForEachEntry( p->vObjs, pObj, i ) if ( (pObj) == NULL ) {} else +// iterator over all nodes +#define Dar_ManForEachNode( p, pObj, i ) \ + Vec_PtrForEachEntry( p->vObjs, pObj, i ) if ( (pObj) == NULL || !Dar_ObjIsNode(pObj) ) {} else // iterator over all cuts of the node #define Dar_ObjForEachCut( pObj, pCut, i ) \ for ( pCut = pObj->pData, i = 0; i < (int)pObj->nCuts; i++, pCut++ ) if ( i==0 ) {} else @@ -383,6 +395,7 @@ extern void Dar_LibEval( Dar_Man_t * p, Dar_Obj_t * pRoot, Dar_Cut_t extern Dar_Obj_t * Dar_LibBuildBest( Dar_Man_t * p ); /*=== darMan.c ==========================================================*/ extern Dar_Man_t * Dar_ManStart(); +extern Dar_Man_t * Dar_ManStartFrom( Dar_Man_t * p ); extern Dar_Man_t * Dar_ManDup( Dar_Man_t * p ); extern void Dar_ManStop( Dar_Man_t * p ); extern int Dar_ManCleanup( Dar_Man_t * p ); diff --git a/src/aig/dar/darCnf.c b/src/aig/dar/darCnf.c deleted file mode 100644 index fd58b875..00000000 --- a/src/aig/dar/darCnf.c +++ /dev/null @@ -1,679 +0,0 @@ -/**CFile**************************************************************** - - FileName [darCnf.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: darCnf.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "dar.h" - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Dereferences the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline void Dar_CurDeref2( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - Dar_Obj_t * pLeaf; - int i; - Dar_CutForEachLeaf( p, pCut, pLeaf, i ) - { - assert( pLeaf->nRefs > 0 ); - pLeaf->nRefs--; - } -} - -/**Function************************************************************* - - Synopsis [References the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline void Dar_CurRef2( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - Dar_Obj_t * pLeaf; - int i; - Dar_CutForEachLeaf( p, pCut, pLeaf, i ) - pLeaf->nRefs++; -} - -/**Function************************************************************* - - Synopsis [Computes area of the first level.] - - Description [The cut need to be derefed.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Dar_CutDeref( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - Dar_Obj_t * pLeaf; - int i; - Dar_CutForEachLeaf( p, pCut, pLeaf, i ) - { - assert( pLeaf->nRefs > 0 ); - if ( --pLeaf->nRefs > 0 || !Dar_ObjIsAnd(pLeaf) ) - continue; - Dar_CutDeref( p, Dar_ObjBestCut(pLeaf) ); - } -} - -/**Function************************************************************* - - Synopsis [Computes area of the first level.] - - Description [The cut need to be derefed.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Dar_CutRef( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - Dar_Obj_t * pLeaf; - int i, Area = pCut->Cost; - Dar_CutForEachLeaf( p, pCut, pLeaf, i ) - { - assert( pLeaf->nRefs >= 0 ); - if ( pLeaf->nRefs++ > 0 || !Dar_ObjIsAnd(pLeaf) ) - continue; - Area += Dar_CutRef( p, Dar_ObjBestCut(pLeaf) ); - } - return Area; -} - -/**Function************************************************************* - - Synopsis [Computes exact area of the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Dar_CutArea( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - int Area = Dar_CutRef( p, pCut ); - Dar_CutDeref( p, pCut ); - return Area; -} - - -/**Function************************************************************* - - Synopsis [Returns 1 if the second cut is better.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline int Dar_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; -} - -/**Function************************************************************* - - Synopsis [Returns the cut with the smallest area flow.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Dar_Cut_t * Dar_ObjFindBestCut( Dar_Obj_t * pObj ) -{ - Dar_Cut_t * pCut, * pCutBest; - int i; - pCutBest = NULL; - Dar_ObjForEachCut( pObj, pCut, i ) - if ( pCutBest == NULL || Dar_CutCompare(pCutBest, pCut) == 1 ) - pCutBest = pCut; - return pCutBest; -} - -/**Function************************************************************* - - Synopsis [Computes area flow of the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Dar_CutAssignAreaFlow( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - Dar_Obj_t * pLeaf; - int i; - pCut->Area = (float)pCut->Cost; - pCut->NoRefs = 0; - pCut->FanRefs = 0; - Dar_CutForEachLeaf( p, pCut, pLeaf, i ) - { - if ( !Dar_ObjIsNode(pLeaf) ) - continue; - if ( pLeaf->nRefs == 0 ) - { - pCut->Area += Dar_ObjBestCut(pLeaf)->Area; -// pCut->NoRefs++; - } - else - { - pCut->Area += Dar_ObjBestCut(pLeaf)->Area / pLeaf->nRefs; -// if ( pCut->FanRefs + pLeaf->nRefs > 15 ) -// pCut->FanRefs = 15; -// else -// pCut->FanRefs += pLeaf->nRefs; - } - } -} - -/**Function************************************************************* - - Synopsis [Computes area flow of the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Dar_CutAssignArea( Dar_Man_t * p, Dar_Cut_t * pCut ) -{ - Dar_Obj_t * pLeaf; - int i; - pCut->Area = (float)pCut->Cost; - pCut->NoRefs = 0; - pCut->FanRefs = 0; - Dar_CutForEachLeaf( p, pCut, pLeaf, i ) - { - if ( !Dar_ObjIsNode(pLeaf) ) - continue; - if ( pLeaf->nRefs == 0 ) - { - pCut->Area += Dar_ObjBestCut(pLeaf)->Cost; - pCut->NoRefs++; - } - else - { - if ( pCut->FanRefs + pLeaf->nRefs > 15 ) - pCut->FanRefs = 15; - else - pCut->FanRefs += pLeaf->nRefs; - } - } -} - - -/**Function************************************************************* - - Synopsis [Computes area, references, and nodes used in the mapping.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Dar_ManScanMapping_rec( Dar_Man_t * p, Dar_Obj_t * pObj, Vec_Ptr_t * vMapped ) -{ - Dar_Obj_t * pLeaf; - Dar_Cut_t * pCutBest; - int aArea, i; - if ( pObj->nRefs++ || Dar_ObjIsPi(pObj) || Dar_ObjIsConst1(pObj) ) - return 0; - assert( Dar_ObjIsAnd(pObj) ); - // collect the node first to derive pre-order - if ( vMapped ) - { -// printf( "%d ", Dar_ObjBestCut(pObj)->Cost ); - Vec_PtrPush( vMapped, pObj ); - } - // visit the transitive fanin of the selected cut - pCutBest = Dar_ObjBestCut(pObj); - aArea = pCutBest->Cost; - Dar_CutForEachLeaf( p, pCutBest, pLeaf, i ) - aArea += Dar_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 in array - p->vMapping.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Vec_Ptr_t * Dar_ManScanMapping( Dar_Man_t * p, int fCollect ) -{ - Vec_Ptr_t * vMapped = NULL; - Dar_Obj_t * pObj; - int i; - // clean all references - Dar_ManForEachObj( p, 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; - Dar_ManForEachPo( p, pObj, i ) - p->aArea += Dar_ManScanMapping_rec( p, Dar_ObjFanin0(pObj), vMapped ); - printf( "Variables = %d. Clauses = %6d.\n", vMapped? Vec_PtrSize(vMapped) : 0, p->aArea ); - return vMapped; -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Dar_ManMapForCnf( Dar_Man_t * p ) -{ - Dar_Obj_t * pObj; - Dar_Cut_t * pCut; - int i, k; - // visit the nodes in the topological order and update their best cuts - Dar_ManForEachObj( p, pObj, i ) - { - if ( !Dar_ObjIsNode(pObj) ) - continue; -// if ( pObj->nRefs ) -// continue; - - // if the node is used, dereference its cut - if ( pObj->nRefs ) - Dar_CutDeref( p, Dar_ObjBestCut(pObj) ); - // evaluate the cuts of this node - Dar_ObjForEachCut( pObj, pCut, k ) -// Dar_CutAssignArea( p, pCut ); -// Dar_CutAssignAreaFlow( p, pCut ); - pCut->Area = (float)Dar_CutArea( p, pCut ); - // find a new good cut - Dar_ObjSetBestCut( pObj, Dar_ObjFindBestCut(pObj) ); - // if the node is used, reference its cut - if ( pObj->nRefs ) - Dar_CutRef( p, Dar_ObjBestCut(pObj) ); - } - return 1; -} - -/**Function************************************************************* - - Synopsis [Returns the number of literals in the SOP.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Dar_SopCountLiterals( char * pSop, int nCubes ) -{ - int nLits = 0, Cube, i, b; - for ( i = 0; i < nCubes; i++ ) - { - Cube = pSop[i]; - for ( b = 3; b >= 0; b-- ) - { - if ( Cube % 3 != 2 ) - nLits++; - Cube = Cube / 3; - } - } - return nLits; -} - -/**Function************************************************************* - - Synopsis [Writes the cube and returns the number of literals in it.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Dar_SopWriteCube( char Cube, int * pVars, int fCompl, int * pLiterals ) -{ - int nLits = 4, b; - for ( b = 3; b >= 0; b-- ) - { - if ( Cube % 3 == 0 ) - *pLiterals++ = 2 * pVars[b] + 1 ^ fCompl; - else if ( Cube % 3 == 1 ) - *pLiterals++ = 2 * pVars[b] + fCompl; - else - nLits--; - Cube = Cube / 3; - } - return nLits; -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Dar_Cnf_t * Dar_ManWriteCnf( Dar_Man_t * p, Vec_Ptr_t * vMapped ) -{ - Dar_Cnf_t * pCnf; - Dar_Obj_t * pObj; - Dar_Cut_t * pCut; - int OutVar, pVars[4], * pLits, ** pClas; - unsigned uTruth; - int i, k, nLiterals, nClauses, nCubes, Number; - - // count the number of literals and clauses - nLiterals = 1 + Dar_ManPoNum( p ); - nClauses = 1 + Dar_ManPoNum( p ); - Vec_PtrForEachEntry( vMapped, pObj, i ) - { - assert( Dar_ObjIsNode(pObj) ); - pCut = Dar_ObjBestCut( pObj ); - // positive polarity of the cut - uTruth = pCut->uTruth; - nLiterals += Dar_SopCountLiterals( p->pSops[uTruth], p->pSopSizes[uTruth] ) + p->pSopSizes[uTruth]; - nClauses += p->pSopSizes[uTruth]; - // negative polarity of the cut - uTruth = 0xFFFF & ~pCut->uTruth; - nLiterals += Dar_SopCountLiterals( p->pSops[uTruth], p->pSopSizes[uTruth] ) + p->pSopSizes[uTruth]; - nClauses += p->pSopSizes[uTruth]; - } - - // allocate CNF - pCnf = ALLOC( Dar_Cnf_t, 1 ); - memset( pCnf, 0, sizeof(Dar_Cnf_t) ); - pCnf->nLiterals = nLiterals; - pCnf->nClauses = nClauses; - pCnf->pClauses = ALLOC( int *, nClauses ); - pCnf->pClauses[0] = ALLOC( int, nLiterals ); - pCnf->pVarNums = ALLOC( int, 1+Dar_ManObjIdMax(p) ); - - // set variable numbers - Number = 0; - memset( pCnf->pVarNums, 0xff, sizeof(int) * (1+Dar_ManObjIdMax(p)) ); - Vec_PtrForEachEntry( vMapped, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - Dar_ManForEachPi( p, pObj, i ) - pCnf->pVarNums[pObj->Id] = Number++; - pCnf->pVarNums[Dar_ManConst1(p)->Id] = Number++; - - // assign the clauses - pLits = pCnf->pClauses[0]; - pClas = pCnf->pClauses; - Vec_PtrForEachEntry( vMapped, pObj, i ) - { - pCut = Dar_ObjBestCut( pObj ); - // write variables of this cut - OutVar = pCnf->pVarNums[ pObj->Id ]; - for ( k = 0; k < (int)pCut->nLeaves; k++ ) - { - pVars[k] = pCnf->pVarNums[ pCut->pLeaves[k] ]; - assert( pVars[k] <= Dar_ManObjIdMax(p) ); - } - - // positive polarity of the cut - uTruth = pCut->uTruth; - nCubes = p->pSopSizes[uTruth]; - // write the cubes - for ( k = 0; k < nCubes; k++ ) - { - *pClas++ = pLits; - *pLits++ = 2 * pVars[OutVar] + 1; - pLits += Dar_SopWriteCube( p->pSops[uTruth][k], pVars, 0, pLits ); - } - - // negative polarity of the cut - uTruth = 0xFFFF & ~pCut->uTruth; - nCubes = p->pSopSizes[uTruth]; - // write the cubes - for ( k = 0; k < nCubes; k++ ) - { - *pClas++ = pLits; - *pLits++ = 2 * pVars[OutVar]; - pLits += Dar_SopWriteCube( p->pSops[uTruth][k], pVars, 1, pLits ); - } - } - - // write the output literals - Dar_ManForEachPo( p, pObj, i ) - { - OutVar = pCnf->pVarNums[ Dar_ObjFanin0(pObj)->Id ]; - *pClas++ = pLits; - *pLits++ = 2 * pVars[OutVar] + Dar_ObjFaninC0(pObj); - } - // write the constant literal - OutVar = pCnf->pVarNums[ Dar_ManConst1(p)->Id ]; - assert( OutVar <= Dar_ManObjIdMax(p) ); - *pClas++ = pLits; - *pLits++ = 2 * pVars[OutVar]; - - // 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 [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Dar_CnfFree( Dar_Cnf_t * pCnf ) -{ - if ( pCnf == NULL ) - return; - free( pCnf->pClauses[0] ); - free( pCnf->pClauses ); - free( pCnf->pVarNums ); - free( pCnf ); -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Dar_ManExploreMapping( Dar_Man_t * p ) -{ - extern int Dar_ManLargeCutEval( Dar_Man_t * p, Dar_Obj_t * pRoot, Dar_Cut_t * pCutR, Dar_Cut_t * pCutL, int Leaf ); - int nNew, Gain, nGain = 0, nVars = 0; - - Dar_Obj_t * pObj, * pLeaf; - Dar_Cut_t * pCutBest, * pCut; - int i, k, a, b, Counter; - Dar_ManForEachObj( p, pObj, i ) - { - if ( !Dar_ObjIsNode(pObj) ) - continue; - if ( pObj->nRefs == 0 ) - continue; - pCutBest = Dar_ObjBestCut(pObj); - Dar_CutForEachLeaf( p, pCutBest, pLeaf, k ) - { - if ( !Dar_ObjIsNode(pLeaf) ) - continue; - assert( pLeaf->nRefs != 0 ); - if ( pLeaf->nRefs != 1 ) - continue; - pCut = Dar_ObjBestCut(pLeaf); -/* - // 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 = Dar_ManLargeCutEval( p, pObj, pCutBest, pCut, pLeaf->Id ); -// printf( "%d+%d=%d:%d(%d) ", pCutBest->Cost, pCut->Cost, -// pCutBest->Cost+pCut->Cost, nNew, pCutBest->Cost+pCut->Cost-nNew ); - - Gain = pCutBest->Cost+pCut->Cost-nNew; - if ( Gain > 0 ) - { - nGain += Gain; - nVars++; - } - } - } - printf( "Total gain = %d. Vars = %d.\n", nGain, nVars ); -} - -/**Function************************************************************* - - Synopsis [] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Dar_Cnf_t * Dar_ManDeriveCnf( Dar_Man_t * p ) -{ - Dar_Cnf_t * pCnf = NULL; - Vec_Ptr_t * vMapped; - int i, nIters = 2; - int clk; - - // derive SOPs for all 4-variable functions -clk = clock(); - Dar_LibReadMsops( &p->pSopSizes, &p->pSops ); -PRT( "setup", clock() - clk ); - - // generate cuts for all nodes, assign cost, and find best cuts - // (used pObj->pNext for storing the best cut of the node!) -clk = clock(); - Dar_ManComputeCuts( p ); -PRT( "cuts ", clock() - clk ); - - // iteratively improve area flow - for ( i = 0; i < nIters; i++ ) - { -clk = clock(); - Dar_ManScanMapping( p, 0 ); - Dar_ManMapForCnf( p ); -PRT( "iter ", clock() - clk ); - } - - // write the file - vMapped = Dar_ManScanMapping( p, 1 ); -clk = clock(); - Dar_ManExploreMapping( p ); -PRT( "exten", clock() - clk ); -// pCnf = Dar_ManWriteCnf( p, vMapped ); - Vec_PtrFree( vMapped ); - - // clean up - Dar_ManCutsFree( p ); - return pCnf; -} - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - diff --git a/src/aig/dar/darCore.c b/src/aig/dar/darCore.c index 820b0002..147cd38f 100644 --- a/src/aig/dar/darCore.c +++ b/src/aig/dar/darCore.c @@ -106,11 +106,15 @@ p->timeCuts += clock() - clk; // count gains of this class p->ClassGains[p->ClassBest] += nNodeBefore - nNodeAfter; +// if ( p->ClassBest == 29 ) +// printf( "%d ", p->OutNumBest ); + } p->timeTotal = clock() - clkStart; p->timeOther = p->timeTotal - p->timeCuts - p->timeEval; Extra_ProgressBarStop( pProgress ); + p->nCutMemUsed = Dar_MmFlexReadMemUsage(p->pMemCuts)/(1<<20); Dar_ManCutsFree( p ); // put the nodes into the DFS order and reassign their IDs // Dar_NtkReassignIds( p ); @@ -161,7 +165,6 @@ int Dar_ManComputeCuts( Dar_Man_t * p ) Dar_ManNodeNum(p), nCutsTotal, nCutsMax, (float)nCutsTotal/Dar_ManNodeNum(p), p->nCutsFiltered, p->nCutsFiltered+nCutsTotal+Dar_ManNodeNum(p)+Dar_ManPiNum(p) ); PRT( "Time", clock() - clkStart ); - // free the cuts // Dar_ManCutsFree( p ); return 1; diff --git a/src/aig/dar/darCut.c b/src/aig/dar/darCut.c index 51b0bb10..48f4dc6c 100644 --- a/src/aig/dar/darCut.c +++ b/src/aig/dar/darCut.c @@ -65,7 +65,7 @@ static inline int Dar_CutCheckDominance( Dar_Cut_t * pDom, Dar_Cut_t * pCut ) SeeAlso [] ***********************************************************************/ -int Dar_CutFilter( Dar_Man_t * p, Dar_Cut_t * pCut ) +static inline int Dar_CutFilter( Dar_Man_t * p, Dar_Cut_t * pCut ) { Dar_Cut_t * pTemp; int i, k; @@ -213,7 +213,7 @@ static inline int Dar_CutMergeOrdered( Dar_Cut_t * pC, Dar_Cut_t * pC0, Dar_Cut_ SeeAlso [] ***********************************************************************/ -int Dar_CutMerge( Dar_Cut_t * pCut, Dar_Cut_t * pCut0, Dar_Cut_t * pCut1 ) +static inline int Dar_CutMerge( Dar_Cut_t * pCut, Dar_Cut_t * pCut0, Dar_Cut_t * pCut1 ) { // merge the nodes if ( pCut0->nLeaves <= pCut1->nLeaves ) @@ -347,7 +347,7 @@ static inline unsigned Dar_CutTruthShrink( unsigned uTruth, int nVars, unsigned SeeAlso [] ***********************************************************************/ -unsigned Dar_CutTruth( Dar_Cut_t * pCut, Dar_Cut_t * pCut0, Dar_Cut_t * pCut1, int fCompl0, int fCompl1 ) +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; @@ -367,7 +367,7 @@ unsigned Dar_CutTruth( Dar_Cut_t * pCut, Dar_Cut_t * pCut0, Dar_Cut_t * pCut1, i SeeAlso [] ***********************************************************************/ -int Dar_CutSuppMinimize( Dar_Cut_t * pCut ) +static inline int Dar_CutSuppMinimize( Dar_Cut_t * pCut ) { unsigned uMasks[4][2] = { { 0x5555, 0xAAAA }, @@ -420,7 +420,7 @@ void Dar_ObjSetupTrivial( Dar_Obj_t * pObj ) { Dar_Cut_t * pCut; pCut = pObj->pData; - pCut->Cost = 0; + memset( pCut, 0, sizeof(Dar_Cut_t) ); pCut->nLeaves = 1; pCut->pLeaves[0] = pObj->Id; // pCut->pIndices[0] = 0; @@ -464,10 +464,7 @@ void Dar_ManSetupPis( Dar_Man_t * p ) ***********************************************************************/ void Dar_ManCutsFree( Dar_Man_t * p ) { - Dar_Obj_t * pObj; - int i; - Dar_ManForEachObj( p, pObj, i ) - pObj->pData = NULL; +// Dar_ManCleanData( p ); Dar_MmFlexStop( p->pMemCuts, 0 ); p->pMemCuts = NULL; } @@ -519,11 +516,11 @@ Dar_Cut_t * Dar_ObjComputeCuts( Dar_Man_t * p, Dar_Obj_t * pObj ) continue; } - // CNF mapping: assign the cut cost if needed - if ( p->pSopSizes ) + // CNF mapping: assign the cut cost + if ( p->pManCnf ) { - pCut->Cost = p->pSopSizes[pCut->uTruth] + p->pSopSizes[0xFFFF & ~pCut->uTruth]; - Dar_CutAssignAreaFlow( p, pCut ); + extern void Cnf_CutAssignAreaFlow( void * pManCnf, Dar_Cut_t * pCut ); + Cnf_CutAssignAreaFlow( p->pManCnf, pCut ); } // increment the number of cuts @@ -538,9 +535,12 @@ Dar_Cut_t * Dar_ObjComputeCuts( Dar_Man_t * p, Dar_Obj_t * pObj ) for ( i = 0; i < p->nCutsUsed; i++ ) *++pCut = *(p->pBaseCuts[i]); - // CNF mapping: assign the best cut if needed - if ( p->pSopSizes ) - Dar_ObjSetBestCut( pObj, Dar_ObjFindBestCut(pObj) ); + // CNF mapping: assign the best cut + if ( p->pManCnf ) + { + extern Dar_Cut_t * Cnf_ObjFindBestCut( Dar_Obj_t * pObj ); + Dar_ObjSetBestCut( Cnf_ObjFindBestCut(pObj) ); + } return pObj->pData; } diff --git a/src/aig/dar/darLib.c b/src/aig/dar/darLib.c index c92324f6..89ce2f0b 100644 --- a/src/aig/dar/darLib.c +++ b/src/aig/dar/darLib.c @@ -273,6 +273,7 @@ void Dar_LibSetup( Dar_Lib_t * p, Vec_Int_t * vOuts ) for ( k = 0; k < p->nSubgr[i]; k++ ) Dar_LibSetup_rec( p, Dar_LibObj(p, p->pSubgr[i][k]), i ); nNodesTotal += p->nNodes[i]; +//printf( "Class %3d : Subgraphs = %4d. Nodes = %5d.\n", i, p->nSubgr[i], p->nNodes[i] ); } assert( nNodesTotal == p->pNodesTotal ); // prepare the number of the PI nodes @@ -604,6 +605,8 @@ void Dar_LibEval( Dar_Man_t * p, Dar_Obj_t * pRoot, Dar_Cut_t * pCut, int Requir int i, k, Class, nNodesSaved, nNodesAdded, nNodesGained, clk; if ( pCut->nLeaves != 4 ) return; +// if ( s_DarLib->nSubgr[ s_DarLib->pMap[pCut->uTruth] ] > 100 ) +// return; clk = clock(); /* for ( k = 0; k < 4; k++ ) @@ -643,10 +646,11 @@ void Dar_LibEval( Dar_Man_t * p, Dar_Obj_t * pRoot, Dar_Cut_t * pCut, int Requir Vec_PtrClear( p->vLeavesBest ); for ( k = 0; k < 4; k++ ) Vec_PtrPush( p->vLeavesBest, s_DarLib->pDatas[k].pFunc ); - p->OutBest = s_DarLib->pSubgr[Class][i]; - p->LevelBest = s_DarLib->pDatas[pObj->Num].Level; - p->GainBest = nNodesGained; - p->ClassBest = Class; + p->OutBest = s_DarLib->pSubgr[Class][i]; + p->OutNumBest = i; + p->LevelBest = s_DarLib->pDatas[pObj->Num].Level; + p->GainBest = nNodesGained; + p->ClassBest = Class; } clk = clock() - clk; p->ClassTimes[Class] += clk; diff --git a/src/aig/dar/darMan.c b/src/aig/dar/darMan.c index da66043e..25b15e9c 100644 --- a/src/aig/dar/darMan.c +++ b/src/aig/dar/darMan.c @@ -79,6 +79,68 @@ Dar_Man_t * Dar_ManStart( int nNodesMax ) /**Function************************************************************* + Synopsis [Duplicates the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Man_t * Dar_ManStartFrom( Dar_Man_t * p ) +{ + Dar_Man_t * pNew; + Dar_Obj_t * pObj; + int i; + // create the new manager + pNew = Dar_ManStart(); + // create the PIs + Dar_ManConst1(p)->pData = Dar_ManConst1(pNew); + Dar_ManForEachPi( p, pObj, i ) + pObj->pData = Dar_ObjCreatePi(pNew); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Duplicates the AIG manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Man_t * Dar_ManDup( Dar_Man_t * p ) +{ + Dar_Man_t * pNew; + Dar_Obj_t * pObj; + int i; + // create the new manager + pNew = Dar_ManStart(); + // create the PIs + Dar_ManConst1(p)->pData = Dar_ManConst1(pNew); + Dar_ManForEachPi( p, pObj, i ) + pObj->pData = Dar_ObjCreatePi(pNew); + // duplicate internal nodes + Dar_ManForEachObj( p, pObj, i ) + if ( Dar_ObjIsBuf(pObj) ) + pObj->pData = Dar_ObjChild0Copy(pObj); + else if ( Dar_ObjIsNode(pObj) ) + pObj->pData = Dar_And( pNew, Dar_ObjChild0Copy(pObj), Dar_ObjChild1Copy(pObj) ); + // add the POs + Dar_ManForEachPo( p, pObj, i ) + Dar_ObjCreatePo( pNew, Dar_ObjChild0Copy(pObj) ); + // check the resulting network + if ( !Dar_ManCheck(pNew) ) + printf( "Dar_ManDup(): The check has failed.\n" ); + return pNew; +} + +/**Function************************************************************* + Synopsis [Stops the AIG manager.] Description [] @@ -107,13 +169,6 @@ void Dar_ManStop( Dar_Man_t * p ) if ( p->vRequired ) Vec_IntFree( p->vRequired ); if ( p->vLeavesBest ) Vec_PtrFree( p->vLeavesBest ); free( p->pTable ); - // free CNF mapping data - if ( p->pSopSizes ) - { - free( p->pSopSizes ); - free( p->pSops[1] ); - free( p->pSops ); - } free( p ); } @@ -185,7 +240,8 @@ void Dar_ManPrintStats( Dar_Man_t * p ) void Dar_ManPrintRuntime( Dar_Man_t * p ) { int i, Gain; - printf( "Good cuts = %d. Bad cuts = %d.\n", p->nCutsGood, p->nCutsBad ); + printf( "Good cuts = %d. Bad cuts = %d. Cut mem = %d Mb\n", + p->nCutsGood, p->nCutsBad, p->nCutMemUsed ); PRT( "Cuts ", p->timeCuts ); PRT( "Eval ", p->timeEval ); PRT( "Other ", p->timeOther ); diff --git a/src/aig/fra/fra.h b/src/aig/fra/fra.h new file mode 100644 index 00000000..41d8692d --- /dev/null +++ b/src/aig/fra/fra.h @@ -0,0 +1,196 @@ +/**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 "dar.h" +#include "satSolver.h" + +//////////////////////////////////////////////////////////////////////// +/// PARAMETERS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// BASIC TYPES /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Fra_Par_t_ Fra_Par_t; +typedef struct Fra_Man_t_ Fra_Man_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 fSpeculate; // use speculative reduction + 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 +}; + +// FRAIG manager +struct Fra_Man_t_ +{ + // high-level data + Fra_Par_t * pPars; // parameters governing fraiging + // AIG managers + Dar_Man_t * pManAig; // the starting AIG manager + Dar_Man_t * pManFraig; // the final AIG manager + // simulation info + unsigned * pSimWords; // memory for simulation information + int nSimWords; // the number of simulation words + // 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 + Vec_Ptr_t * vClasses; // equivalence classes + Vec_Ptr_t * vClasses1; // equivalence class of Const1 node + Vec_Ptr_t * vClassesTemp; // temporary storage for new classes + Dar_Obj_t ** pMemClasses; // memory allocated for equivalence classes + Dar_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 + // 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 + sint64 nBTLimitGlobal; // resource limit + sint64 nInsLimitGlobal; // resource limit + // various data members + Dar_Obj_t ** pMemFraig; // memory allocated for points to the fraig nodes + Dar_Obj_t ** pMemRepr; // memory allocated for points to the node representatives + Vec_Ptr_t ** pMemFanins; // the arrays of fanins + int * pMemSatNums; // the array of SAT numbers + int nSizeAlloc; // allocated size of the arrays + // 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; +}; + +//////////////////////////////////////////////////////////////////////// +/// MACRO DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +static inline unsigned * Fra_ObjSim( Dar_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pSimWords + ((Fra_Man_t *)pObj->pData)->nSimWords * pObj->Id; } +static inline unsigned Fra_ObjRandomSim() { return (rand() << 24) ^ (rand() << 12) ^ rand(); } + +static inline Dar_Obj_t * Fra_ObjFraig( Dar_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pMemFraig[pObj->Id]; } +static inline Dar_Obj_t * Fra_ObjRepr( Dar_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pMemRepr[pObj->Id]; } +static inline Vec_Ptr_t * Fra_ObjFaninVec( Dar_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pMemFanins[pObj->Id]; } +static inline int Fra_ObjSatNum( Dar_Obj_t * pObj ) { return ((Fra_Man_t *)pObj->pData)->pMemSatNums[pObj->Id]; } + +static inline Dar_Obj_t * Fra_ObjChild0Fra( Dar_Obj_t * pObj ) { assert( !Dar_IsComplement(pObj) ); return Dar_ObjFanin0(pObj)? Dar_NotCond(Fra_ObjFraig(Dar_ObjFanin0(pObj)), Dar_ObjFaninC0(pObj)) : NULL; } +static inline Dar_Obj_t * Fra_ObjChild1Fra( Dar_Obj_t * pObj ) { assert( !Dar_IsComplement(pObj) ); return Dar_ObjFanin1(pObj)? Dar_NotCond(Fra_ObjFraig(Dar_ObjFanin1(pObj)), Dar_ObjFaninC1(pObj)) : NULL; } + +static inline void Fra_ObjSetFraig( Dar_Obj_t * pObj, Dar_Obj_t * pNode ) { ((Fra_Man_t *)pObj->pData)->pMemFraig[pObj->Id] = pNode; } +static inline void Fra_ObjSetRepr( Dar_Obj_t * pObj, Dar_Obj_t * pNode ) { ((Fra_Man_t *)pObj->pData)->pMemRepr[pObj->Id] = pNode; } +static inline void Fra_ObjSetFaninVec( Dar_Obj_t * pObj, Vec_Ptr_t * vFanins ) { ((Fra_Man_t *)pObj->pData)->pMemFanins[pObj->Id] = vFanins; } +static inline void Fra_ObjSetSatNum( Dar_Obj_t * pObj, int Num ) { ((Fra_Man_t *)pObj->pData)->pMemSatNums[pObj->Id] = Num; } + +//////////////////////////////////////////////////////////////////////// +/// ITERATORS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +/*=== fraAnd.c ========================================================*/ +extern void Fra_Sweep( Fra_Man_t * p ); +/*=== fraClass.c ========================================================*/ +extern void Fra_CreateClasses( Fra_Man_t * p ); +extern int Fra_RefineClasses( Fra_Man_t * p ); +extern int Fra_RefineClasses1( Fra_Man_t * p ); +/*=== fraCnf.c ========================================================*/ +extern void Fra_NodeAddToSolver( Fra_Man_t * p, Dar_Obj_t * pOld, Dar_Obj_t * pNew ); +/*=== fraCore.c ========================================================*/ +extern Dar_Man_t * Fra_Perform( Dar_Man_t * pManAig, Fra_Par_t * pParams ); +/*=== fraMan.c ========================================================*/ +extern void Fra_ParamsDefault( Fra_Par_t * pParams ); +extern Fra_Man_t * Fra_ManStart( Dar_Man_t * pManAig, Fra_Par_t * pParams ); +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, Dar_Obj_t * pOld, Dar_Obj_t * pNew ); +extern int Fra_NodeIsConst( Fra_Man_t * p, Dar_Obj_t * pNew ); +/*=== fraSim.c ========================================================*/ +extern int Fra_NodeHasZeroSim( Fra_Man_t * p, Dar_Obj_t * pObj ); +extern int Fra_NodeCompareSims( Fra_Man_t * p, Dar_Obj_t * pObj0, Dar_Obj_t * pObj1 ); +extern void Fra_SavePattern( Fra_Man_t * p ); +extern void Fra_Simulate( Fra_Man_t * p ); +extern void Fra_Resimulate( Fra_Man_t * p ); +extern int Fra_CheckOutputSims( Fra_Man_t * p ); + +#ifdef __cplusplus +} +#endif + +#endif + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + diff --git a/src/aig/fra/fraAnd.c b/src/aig/fra/fraAnd.c new file mode 100644 index 00000000..333ef1b1 --- /dev/null +++ b/src/aig/fra/fraAnd.c @@ -0,0 +1,138 @@ +/**CFile**************************************************************** + + FileName [fraAnd.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Fraig FRAIG package.] + + Synopsis [] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$Id: fraAnd.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + + +/**Function************************************************************* + + Synopsis [Performs fraiging for one node.] + + Description [Returns the fraiged node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Obj_t * Fra_And( Fra_Man_t * p, Dar_Obj_t * pObjOld ) +{ + Dar_Obj_t * pObjOldRepr, * pObjFraig, * pFanin0Fraig, * pFanin1Fraig, * pObjOldReprFraig; + int RetValue; + assert( !Dar_IsComplement(pObjOld) ); + assert( Dar_ObjIsNode(pObjOld) ); + // get the fraiged fanins + pFanin0Fraig = Fra_ObjChild0Fra(pObjOld); + pFanin1Fraig = Fra_ObjChild1Fra(pObjOld); + // get the fraiged node + pObjFraig = Dar_And( p->pManFraig, pFanin0Fraig, pFanin1Fraig ); + // get representative of this class + pObjOldRepr = Fra_ObjRepr(pObjOld); + if ( pObjOldRepr == NULL || // this is a unique node + (!p->pPars->fDoSparse && pObjOldRepr == Dar_ManConst1(p->pManAig)) ) // this is a sparse node + { + assert( Dar_Regular(pFanin0Fraig) != Dar_Regular(pFanin1Fraig) ); + assert( pObjFraig != Dar_Regular(pFanin0Fraig) ); + assert( pObjFraig != Dar_Regular(pFanin1Fraig) ); + return pObjFraig; + } + // get the fraiged representative + pObjOldReprFraig = Fra_ObjFraig(pObjOldRepr); + // if the fraiged nodes are the same, return + if ( Dar_Regular(pObjFraig) == Dar_Regular(pObjOldReprFraig) ) + return pObjFraig; + assert( Dar_Regular(pObjFraig) != Dar_ManConst1(p->pManFraig) ); + // if they are proved different, the c-ex will be in p->pPatWords + RetValue = Fra_NodesAreEquiv( p, Dar_Regular(pObjOldReprFraig), Dar_Regular(pObjFraig) ); + if ( RetValue == 1 ) // proved equivalent + { + pObjOld->fMarkA = 1; + return Dar_NotCond( pObjOldReprFraig, pObjOld->fPhase ^ pObjOldRepr->fPhase ); + } + if ( RetValue == -1 ) // failed + { + if ( !p->pPars->fSpeculate ) + return pObjFraig; + // substitute the node + pObjOld->fMarkB = 1; + return Dar_NotCond( pObjOldReprFraig, pObjOld->fPhase ^ pObjOldRepr->fPhase ); + } + // simulate the counter-example and return the Fraig node + Fra_Resimulate( p ); + return pObjFraig; +} + +/**Function************************************************************* + + Synopsis [Performs fraiging for the internal nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_Sweep( Fra_Man_t * p ) +{ + Dar_Obj_t * pObj, * pObjNew; + int i, k = 0; +p->nClassesZero = Vec_PtrSize(p->vClasses1); +p->nClassesBeg = Vec_PtrSize(p->vClasses); + // duplicate internal nodes +// p->pProgress = Extra_ProgressBarStart( stdout, Dar_ManNodeNum(p->pManAig) ); + Dar_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 ) + pObjNew = Dar_And( p->pManFraig, Fra_ObjChild0Fra(pObj), Fra_ObjChild1Fra(pObj) ); + else + pObjNew = Fra_And( p, pObj ); // pObjNew can be complemented + assert( Fra_ObjFraig(pObj) != NULL ); + Fra_ObjSetFraig( pObj, pObjNew ); + } +// Extra_ProgressBarStop( p->pProgress ); +p->nClassesEnd = Vec_PtrSize(p->vClasses); + // try to prove the outputs of the miter + p->nNodesMiter = Dar_ManNodeNum(p->pManFraig); +// Fra_MiterStatus( p->pManFraig ); +// if ( p->pPars->fProve && p->pManFraig->pData == NULL ) +// Fra_MiterProve( p ); + // add the POs + Dar_ManForEachPo( p->pManAig, pObj, i ) + Dar_ObjCreatePo( p->pManFraig, Fra_ObjChild0Fra(pObj) ); + // remove dangling nodes + Dar_ManCleanup( p->pManFraig ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraClass.c b/src/aig/fra/fraClass.c new file mode 100644 index 00000000..1f2fc165 --- /dev/null +++ b/src/aig/fra/fraClass.c @@ -0,0 +1,394 @@ +/**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 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 /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Count the number of pairs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_CountPairsClasses( Fra_Man_t * p ) +{ + Dar_Obj_t ** pClass; + int i, nNodes, nPairs = 0; + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + for ( nNodes = 0; pClass[nNodes]; nNodes++ ) + { + if ( nNodes > DAR_INFINITY ) + { + printf( "Error in equivalence classes.\n" ); + break; + } + } + nPairs += (nNodes - 1) * (nNodes - 2) / 2; + } + return nPairs; +} + +/**Function************************************************************* + + Synopsis [Computes hash value using simulation info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +unsigned Fra_NodeHash( Fra_Man_t * p, Dar_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 + }; + unsigned * pSims; + unsigned uHash; + int i; + assert( p->nSimWords <= 128 ); + uHash = 0; + pSims = Fra_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + uHash ^= pSims[i] * s_FPrimes[i]; + return uHash; +} + +/**Function******************************************************************** + + Synopsis [Returns the next prime >= p.] + + Description [Copied from CUDD, for stand-aloneness.] + + SideEffects [None] + + SeeAlso [] + +******************************************************************************/ +unsigned int Cudd_PrimeFra( 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 [Creates initial simulation classes.] + + Description [Assumes that simulation info is assigned.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_CreateClasses( Fra_Man_t * p ) +{ + Dar_Obj_t ** pTable; + Dar_Obj_t * pObj; + int i, k, k2, nTableSize, nEntries, iEntry; + // allocate the table + nTableSize = Cudd_PrimeFra( Dar_ManNodeNum(p->pManAig) ); + pTable = ALLOC( Dar_Obj_t *, nTableSize ); + memset( pTable, 0, sizeof(Dar_Obj_t *) * nTableSize ); + // collect nodes into the table + Vec_PtrClear( p->vClasses1 ); + Dar_ManForEachObj( p->pManAig, pObj, i ) + { + if ( !Dar_ObjIsPi(pObj) && !Dar_ObjIsNode(pObj) ) + continue; + // hash the node by its simulation info + iEntry = Fra_NodeHash( p, pObj ) % nTableSize; + // check if the node belongs to the class of constant 1 + if ( iEntry == 0 && Fra_NodeHasZeroSim( p, pObj ) ) + { + Vec_PtrPush( p->vClasses1, pObj ); + continue; + } + // add the node to the table + pObj->pData = pTable[iEntry]; + pTable[iEntry] = pObj; + } + // count the total number of nodes in the non-trivial classes + nEntries = 0; + for ( i = 0; i < nTableSize; i++ ) + if ( pTable[i] && pTable[i]->pData ) + { + k = 0; + for ( pObj = pTable[i]; pObj; pObj = pObj->pData ) + k++; + nEntries += 2*k; + } + // allocate room for classes + p->pMemClasses = ALLOC( Dar_Obj_t *, nEntries + 2*Vec_PtrSize(p->vClasses1) ); + p->pMemClassesFree = p->pMemClasses + nEntries; + // copy the entries into storage + Vec_PtrClear( p->vClasses ); + nEntries = 0; + for ( i = 0; i < nTableSize; i++ ) + if ( pTable[i] && pTable[i]->pData ) + { + k = 0; + for ( pObj = pTable[i]; pObj; pObj = pObj->pData ) + k++; + // write entries in the topological order + k2 = k; + for ( pObj = pTable[i]; pObj; pObj = pObj->pData ) + { + k2--; + p->pMemClasses[nEntries+k2] = pObj; + p->pMemClasses[nEntries+k+k2] = NULL; + } + assert( k2 == 0 ); + Vec_PtrPush( p->vClasses, p->pMemClasses + nEntries ); + nEntries += 2*k; + } + free( pTable ); + // now it is time to refine the classes + Fra_RefineClasses( p ); + // set the pointer to the manager + Dar_ManForEachObj( p->pManAig, pObj, i ) + pObj->pData = p->pManAig; +} + +/**Function************************************************************* + + Synopsis [Refines one class using simulation info.] + + Description [Returns the new class if refinement happened.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Obj_t ** Fra_RefineClassOne( Fra_Man_t * p, Dar_Obj_t ** pClass ) +{ + Dar_Obj_t * pObj; + int i; + assert( pClass[1] != NULL ); + // check if the class is going to be refined + for ( pObj = pClass[1]; pObj; pObj++ ) + if ( !Fra_NodeCompareSims(p, pClass[0], pObj) ) + break; + if ( pObj == NULL ) + return NULL; + // split the class + Vec_PtrClear( p->vClassOld ); + Vec_PtrClear( p->vClassNew ); + Vec_PtrPush( p->vClassOld, pClass[0] ); + for ( pObj = pClass[1]; pObj; pObj++ ) + if ( Fra_NodeCompareSims(p, pClass[0], pObj) ) + Vec_PtrPush( p->vClassOld, pObj ); + else + Vec_PtrPush( p->vClassNew, pObj ); + // put the nodes back into the class memory + Vec_PtrForEachEntry( p->vClassOld, pObj, i ) + { + pClass[i] = pObj; + pClass[Vec_PtrSize(p->vClassOld)+i] = NULL; + } + pClass += 2*Vec_PtrSize(p->vClassOld); + // put the new nodes into the class memory + Vec_PtrForEachEntry( p->vClassNew, pObj, i ) + { + pClass[i] = pObj; + pClass[Vec_PtrSize(p->vClassNew)+i] = NULL; + } + return pClass; +} + +/**Function************************************************************* + + Synopsis [Iteratively refines the classes after simulation.] + + Description [Returns the number of refinements performed.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_RefineClassLastIter( Fra_Man_t * p, Vec_Ptr_t * vClasses ) +{ + Dar_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 ) + break; + // othewise, add the class and continue + 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_RefineClasses( Fra_Man_t * p ) +{ + Vec_Ptr_t * vTemp; + Dar_Obj_t ** pClass; + int clk, i, nRefis = 0; + // check if some outputs already became non-constant + // this is a special case when computation can be stopped!!! + if ( p->pPars->fProve ) + Fra_CheckOutputSims( p ); + if ( p->pManFraig->pData ) + return 0; + // refine the classes +clk = clock(); + Vec_PtrClear( p->vClassesTemp ); + Vec_PtrForEachEntry( p->vClasses, pClass, i ) + { + // add the class to the new array + Vec_PtrPush( p->vClassesTemp, pClass ); + // refine the class interatively + nRefis += Fra_RefineClassLastIter( p, p->vClassesTemp ); + } + // exchange the class representation + vTemp = p->vClassesTemp; + p->vClassesTemp = p->vClasses; + p->vClasses = vTemp; +p->timeRef += clock() - clk; + return nRefis; +} + +/**Function************************************************************* + + Synopsis [Refines constant 1 equivalence class.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_RefineClasses1( Fra_Man_t * p ) +{ + Dar_Obj_t * pObj, ** pClass; + int i, k; + // collect all the nodes to be refined + Vec_PtrClear( p->vClassNew ); + k = 0; + Vec_PtrForEachEntry( p->vClasses1, pObj, i ) + { + if ( Fra_NodeHasZeroSim( p, 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; + if ( Vec_PtrSize(p->vClassNew) == 1 ) + return 1; + // create a new class composed of these nodes + pClass = p->pMemClassesFree; + p->pMemClassesFree += 2 * Vec_PtrSize(p->vClassNew); + Vec_PtrForEachEntry( p->vClassNew, pObj, i ) + { + pClass[i] = pObj; + pClass[Vec_PtrSize(p->vClassNew)+i] = NULL; + } + Vec_PtrPush( p->vClasses, pClass ); + // iteratively refine this class + return 1 + Fra_RefineClassLastIter( p, p->vClasses ); +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraCnf.c b/src/aig/fra/fraCnf.c new file mode 100644 index 00000000..18a5ceb6 --- /dev/null +++ b/src/aig/fra/fraCnf.c @@ -0,0 +1,285 @@ +/**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, Dar_Obj_t * pNode ) +{ + Dar_Obj_t * pNodeI, * pNodeT, * pNodeE; + int pLits[4], RetValue, VarF, VarI, VarT, VarE, fCompT, fCompE; + + assert( !Dar_IsComplement( pNode ) ); + assert( Dar_ObjIsMuxType( pNode ) ); + // get nodes (I = if, T = then, E = else) + pNodeI = Dar_ObjRecognizeMux( pNode, &pNodeT, &pNodeE ); + // get the variable numbers + VarF = Fra_ObjSatNum(pNode); + VarI = Fra_ObjSatNum(pNodeI); + VarT = Fra_ObjSatNum(Dar_Regular(pNodeT)); + VarE = Fra_ObjSatNum(Dar_Regular(pNodeE)); + // get the complementation flags + fCompT = Dar_IsComplement(pNodeT); + fCompE = Dar_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, Dar_Obj_t * pNode, Vec_Ptr_t * vSuper ) +{ + Dar_Obj_t * pFanin; + int * pLits, nLits, RetValue, i; + assert( !Dar_IsComplement(pNode) ); + assert( Dar_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(Dar_Regular(pFanin)), Dar_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(Dar_Regular(pFanin)), !Dar_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( Dar_Obj_t * pObj, Vec_Ptr_t * vSuper, int fFirst, int fUseMuxes ) +{ + // if the new node is complemented or a PI, another gate begins + if ( Dar_IsComplement(pObj) || Dar_ObjIsPi(pObj) || (!fFirst && Dar_ObjRefs(pObj) > 1) || + (fUseMuxes && Dar_ObjIsMuxType(pObj)) ) + { + Vec_PtrPushUnique( vSuper, pObj ); + return; + } + // go through the branches + Fra_CollectSuper_rec( Dar_ObjChild0(pObj), vSuper, 0, fUseMuxes ); + Fra_CollectSuper_rec( Dar_ObjChild1(pObj), vSuper, 0, fUseMuxes ); +} + +/**Function************************************************************* + + Synopsis [Collects the supergate.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Ptr_t * Fra_CollectSuper( Dar_Obj_t * pObj, int fUseMuxes ) +{ + Vec_Ptr_t * vSuper; + assert( !Dar_IsComplement(pObj) ); + assert( !Dar_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, Dar_Obj_t * pObj, Vec_Ptr_t * vFrontier ) +{ + assert( !Dar_IsComplement(pObj) ); + if ( Fra_ObjSatNum(pObj) ) + return; + assert( Fra_ObjSatNum(pObj) == 0 ); + assert( Fra_ObjFaninVec(pObj) == NULL ); + if ( Dar_ObjIsConst1(pObj) ) + return; +//printf( "Assigning node %d number %d\n", pObj->Id, p->nSatVars ); + Fra_ObjSetSatNum( pObj, p->nSatVars++ ); + if ( Dar_ObjIsNode(pObj) ) + Vec_PtrPush( vFrontier, pObj ); +} + +/**Function************************************************************* + + Synopsis [Updates the solver clause database.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_NodeAddToSolver( Fra_Man_t * p, Dar_Obj_t * pOld, Dar_Obj_t * pNew ) +{ + Vec_Ptr_t * vFrontier, * vFanins; + Dar_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 && Dar_ObjIsMuxType(pNode) ) + { + vFanins = Vec_PtrAlloc( 4 ); + Vec_PtrPushUnique( vFanins, Dar_ObjFanin0( Dar_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( vFanins, Dar_ObjFanin0( Dar_ObjFanin1(pNode) ) ); + Vec_PtrPushUnique( vFanins, Dar_ObjFanin1( Dar_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( vFanins, Dar_ObjFanin1( Dar_ObjFanin1(pNode) ) ); + Vec_PtrForEachEntry( vFanins, pFanin, k ) + Fra_ObjAddToFrontier( p, Dar_Regular(pFanin), vFrontier ); + Fra_AddClausesMux( p, pNode ); + } + else + { + vFanins = Fra_CollectSuper( pNode, fUseMuxes ); + Vec_PtrForEachEntry( vFanins, pFanin, k ) + Fra_ObjAddToFrontier( p, Dar_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..7fdd1b83 --- /dev/null +++ b/src/aig/fra/fraCore.c @@ -0,0 +1,64 @@ +/**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 $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs fraiging of the AIG.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dar_Man_t * Fra_Perform( Dar_Man_t * pManAig, Fra_Par_t * pPars ) +{ + Fra_Man_t * p; + Dar_Man_t * pManAigNew; + int clk; + if ( Dar_ManNodeNum(pManAig) == 0 ) + return Dar_ManDup(pManAig); +clk = clock(); + assert( Dar_ManLatchNum(pManAig) == 0 ); + p = Fra_ManStart( pManAig, pPars ); + Fra_Simulate( p ); + Fra_Sweep( p ); + pManAigNew = p->pManFraig; +p->timeTotal = clock() - clk; + Fra_ManStop( p ); + return pManAigNew; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraMan.c b/src/aig/fra/fraMan.c new file mode 100644 index 00000000..cccd1d75 --- /dev/null +++ b/src/aig/fra/fraMan.c @@ -0,0 +1,188 @@ +/**CFile**************************************************************** + + FileName [fraMan.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [New FRAIG package.] + + Synopsis [Starts the FRAIG manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 30, 2007.] + + Revision [$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 +} + +/**Function************************************************************* + + Synopsis [Starts the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fra_Man_t * Fra_ManStart( Dar_Man_t * pManAig, Fra_Par_t * pPars ) +{ + Fra_Man_t * p; + Dar_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->pManFraig = Dar_ManStartFrom( pManAig ); + assert( Dar_ManPiNum(p->pManAig) == Dar_ManPiNum(p->pManFraig) ); + // allocate simulation info + p->nSimWords = pPars->nSimWords; + p->pSimWords = ALLOC( unsigned, (Dar_ManObjIdMax(pManAig) + 1) * p->nSimWords ); + // clean simulation info of the constant node + memset( p->pSimWords, 0, p->nSimWords * sizeof(unsigned) ); + // allocate storage for sim pattern + p->nPatWords = Dar_BitWordNum( Dar_ManPiNum(pManAig) ); + p->pPatWords = ALLOC( unsigned, p->nPatWords ); + p->pPatScores = ALLOC( int, 32 * p->nSimWords ); + p->vPiVars = Vec_PtrAlloc( 100 ); + p->vClasses = Vec_PtrAlloc( 100 ); + // allocate other members + p->nSizeAlloc = Dar_ManObjIdMax(pManAig) + 1; + p->pMemFraig = ALLOC( Dar_Obj_t *, p->nSizeAlloc ); + memset( p->pMemFraig, 0, p->nSizeAlloc * sizeof(Dar_Obj_t *) ); + p->pMemRepr = ALLOC( Dar_Obj_t *, p->nSizeAlloc ); + memset( p->pMemRepr, 0, p->nSizeAlloc * sizeof(Dar_Obj_t *) ); + p->pMemFanins = ALLOC( Vec_Ptr_t *, p->nSizeAlloc ); + memset( p->pMemFanins, 0, p->nSizeAlloc * sizeof(Vec_Ptr_t *) ); + p->pMemSatNums = ALLOC( int, p->nSizeAlloc ); + memset( p->pMemSatNums, 0xff, p->nSizeAlloc * sizeof(int) ); + // set the pointers to the available fraig nodes + Fra_ObjSetFraig( Dar_ManConst1(p->pManAig), Dar_ManConst1(p->pManFraig) ); + Dar_ManForEachPi( p->pManAig, pObj, i ) + Fra_ObjSetFraig( pObj, Dar_ManPi(p->pManFraig, i) ); + // set the pointers to the manager + Dar_ManForEachObj( p->pManFraig, pObj, i ) + pObj->pData = p->pManFraig; + // set random number generator + srand( 0xABCABC ); + return p; +} + +/**Function************************************************************* + + Synopsis [Stops the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManStop( Fra_Man_t * p ) +{ + int i; + for ( i = 0; i < p->nSizeAlloc; i++ ) + if ( p->pMemFanins[i] ) + Vec_PtrFree( p->pMemFanins[i] ); + if ( p->pPars->fVerbose ) + Fra_ManPrint( p ); + 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->vPiVars ) Vec_PtrFree( p->vPiVars ); + if ( p->pSat ) sat_solver_delete( p->pSat ); + FREE( p->pMemSatNums ); + FREE( p->pMemFanins ); + FREE( p->pMemRepr ); + FREE( p->pMemFraig ); + FREE( p->pMemClasses ); + FREE( p->pPatScores ); + FREE( p->pPatWords ); + FREE( p->pSimWords ); + free( p ); +} + +/**Function************************************************************* + + Synopsis [Prints stats for the fraiging manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_ManPrint( Fra_Man_t * p ) +{ + double nMemory = 1.0*Dar_ManObjIdMax(p->pManAig)*((p->nSimWords+2)*sizeof(unsigned)+6*sizeof(void*))/(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->pPars->nBTLimitNode, p->pPars->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", + Dar_ManNodeNum(p->pManFraig), p->nNodesMiter, Dar_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 ); } +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/fraSat.c b/src/aig/fra/fraSat.c new file mode 100644 index 00000000..1c72c807 --- /dev/null +++ b/src/aig/fra/fraSat.c @@ -0,0 +1,328 @@ +/**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 "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static int Fra_SetActivityFactors( Fra_Man_t * p, Dar_Obj_t * pOld, Dar_Obj_t * pNew ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Runs equivalence test for the two nodes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodesAreEquiv( Fra_Man_t * p, Dar_Obj_t * pOld, Dar_Obj_t * pNew ) +{ + int pLits[4], RetValue, RetValue1, nBTLimit, clk, clk2 = clock(); + + // make sure the nodes are not complemented + assert( !Dar_IsComplement(pNew) ); + assert( !Dar_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 ( 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 ); + } + + // if the nodes do not have SAT variables, allocate them + Fra_NodeAddToSolver( p, pOld, pNew ); + + // prepare variable activity + 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_SavePattern( 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( 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_SavePattern( 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 = 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 equivalence test for one node.] + + Description [Returns the fraiged node.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodeIsConst( Fra_Man_t * p, Dar_Obj_t * pNew ) +{ + int pLits[2], RetValue1, RetValue, clk; + + // make sure the nodes are not complemented + assert( !Dar_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 ); + } + + // if the nodes do not have SAT variables, allocate them + Fra_NodeAddToSolver( p, NULL, pNew ); + + // prepare variable activity + 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_SavePattern( 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 [Sets variable activities in the cone.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_SetActivityFactors_rec( Fra_Man_t * p, Dar_Obj_t * pObj, int LevelMin, int LevelMax ) +{ + Vec_Ptr_t * vFanins; + Dar_Obj_t * pFanin; + int i, Counter = 0; + assert( !Dar_IsComplement(pObj) ); + assert( Fra_ObjSatNum(pObj) ); + // skip visited variables + if ( Dar_ObjIsTravIdCurrent(p->pManFraig, pObj) ) + return 0; + Dar_ObjSetTravIdCurrent(p->pManFraig, pObj); + // add the PI to the list + if ( pObj->Level <= (unsigned)LevelMin || Dar_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, Dar_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, Dar_Obj_t * pOld, Dar_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 + Dar_ManIncrementTravId( p->pManFraig ); + // determine the min and max level to visit + assert( p->pPars->dActConeRatio > 0 && p->pPars->dActConeRatio < 1 ); + LevelMax = DAR_MAX( (pNew ? pNew->Level : 0), (pOld ? pOld->Level : 0) ); + LevelMin = (int)(LevelMax * (1.0 - p->pPars->dActConeRatio)); + // traverse + if ( pOld && !Dar_ObjIsConst1(pOld) ) + Fra_SetActivityFactors_rec( p, pOld, LevelMin, LevelMax ); + if ( pNew && !Dar_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/fraSim.c b/src/aig/fra/fraSim.c new file mode 100644 index 00000000..e8b88159 --- /dev/null +++ b/src/aig/fra/fraSim.c @@ -0,0 +1,599 @@ +/**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 [Assigns random patterns to the PI node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_NodeAssignRandom( Fra_Man_t * p, Dar_Obj_t * pObj ) +{ + unsigned * pSims; + int i; + assert( Dar_ObjIsPi(pObj) ); + pSims = Fra_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = Fra_ObjRandomSim(); +} + +/**Function************************************************************* + + Synopsis [Assigns constant patterns to the PI node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_NodeAssignConst( Fra_Man_t * p, Dar_Obj_t * pObj, int fConst1 ) +{ + unsigned * pSims; + int i; + assert( Dar_ObjIsPi(pObj) ); + pSims = Fra_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = fConst1? ~(unsigned)0 : 0; +} + +/**Function************************************************************* + + Synopsis [Assings random simulation info for the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_AssignRandom( Fra_Man_t * p ) +{ + Dar_Obj_t * pObj; + int i; + Dar_ManForEachPi( p->pManAig, pObj, i ) + Fra_NodeAssignRandom( p, pObj ); +} + +/**Function************************************************************* + + Synopsis [Assings distance-1 simulation info for the PIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_AssignDist1( Fra_Man_t * p, unsigned * pPat ) +{ + Dar_Obj_t * pObj; + int i, Limit; + Dar_ManForEachPi( p->pManAig, pObj, i ) + Fra_NodeAssignConst( p, pObj, Dar_InfoHasBit(pPat, i) ); + Limit = DAR_MIN( Dar_ManPiNum(p->pManAig), p->nSimWords * 32 - 1 ); + for ( i = 0; i < Limit; i++ ) + Dar_InfoXorBit( Fra_ObjSim( Dar_ManPi(p->pManAig,i) ), i+1 ); +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation info is composed of all zeros.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodeHasZeroSim( Fra_Man_t * p, Dar_Obj_t * pObj ) +{ + unsigned * pSims; + int i; + pSims = Fra_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + if ( pSims[i] ) + return 0; + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation info is composed of all zeros.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_NodeComplementSim( Fra_Man_t * p, Dar_Obj_t * pObj ) +{ + unsigned * pSims; + int i; + pSims = Fra_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = ~pSims[i]; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if simulation infos are equal.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fra_NodeCompareSims( Fra_Man_t * p, Dar_Obj_t * pObj0, Dar_Obj_t * pObj1 ) +{ + unsigned * pSims0, * pSims1; + int i; + pSims0 = Fra_ObjSim(pObj0); + pSims1 = Fra_ObjSim(pObj1); + for ( i = 0; i < p->nSimWords; i++ ) + if ( pSims0[i] != pSims1[i] ) + return 0; + return 1; +} + + +/**Function************************************************************* + + Synopsis [Simulates one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_NodeSimulate( Fra_Man_t * p, Dar_Obj_t * pObj ) +{ + unsigned * pSims, * pSims0, * pSims1; + int fCompl, fCompl0, fCompl1, i; + assert( !Dar_IsComplement(pObj) ); + assert( Dar_ObjIsNode(pObj) ); + // get hold of the simulation information + pSims = Fra_ObjSim(pObj); + pSims0 = Fra_ObjSim(Dar_ObjFanin0(pObj)); + pSims1 = Fra_ObjSim(Dar_ObjFanin1(pObj)); + // get complemented attributes of the children using their random info + fCompl = pObj->fPhase; + fCompl0 = Dar_ObjFaninPhase(Dar_ObjChild0(pObj)); + fCompl1 = Dar_ObjFaninPhase(Dar_ObjChild1(pObj)); + // simulate + if ( fCompl0 && fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = (pSims0[i] | pSims1[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = ~(pSims0[i] | pSims1[i]); + } + else if ( fCompl0 && !fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = (pSims0[i] | ~pSims1[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = (~pSims0[i] & pSims1[i]); + } + else if ( !fCompl0 && fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = (~pSims0[i] | pSims1[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = (pSims0[i] & ~pSims1[i]); + } + else // if ( !fCompl0 && !fCompl1 ) + { + if ( fCompl ) + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = ~(pSims0[i] & pSims1[i]); + else + for ( i = 0; i < p->nSimWords; i++ ) + pSims[i] = (pSims0[i] & pSims1[i]); + } +} + +/**Function************************************************************* + + Synopsis [Generated const 0 pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SavePattern0( Fra_Man_t * p ) +{ + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); +} + +/**Function************************************************************* + + Synopsis [[Generated const 1 pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SavePattern1( Fra_Man_t * p ) +{ + memset( p->pPatWords, 0xff, sizeof(unsigned) * p->nPatWords ); +} + +/**Function************************************************************* + + Synopsis [Copy pattern from the solver into the internal storage.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SavePattern( Fra_Man_t * p ) +{ + Dar_Obj_t * pObj; + int i; + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); + Dar_ManForEachPi( p->pManFraig, pObj, i ) +// Vec_PtrForEachEntry( p->vPiVars, pObj, i ) + if ( p->pSat->model.ptr[Fra_ObjSatNum(pObj)] == l_True ) + Dar_InfoSetBit( p->pPatWords, i ); +// Ivy_InfoSetBit( p->pPatWords, pObj->Id - 1 ); +} + +/**Function************************************************************* + + Synopsis [Cleans pattern scores.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_CleanPatScores( Fra_Man_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 Fra_AddToPatScores( Fra_Man_t * p, Dar_Obj_t * pClass, Dar_Obj_t * pClassNew ) +{ + unsigned * pSims0, * pSims1; + unsigned uDiff; + int i, w; + // get hold of the simulation information + pSims0 = Fra_ObjSim(pClass); + pSims1 = Fra_ObjSim(pClassNew); + // iterate through the differences and record the score + for ( w = 0; w < p->nSimWords; w++ ) + { + uDiff = pSims0[w] ^ pSims1[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 Fra_SelectBestPat( Fra_Man_t * p ) +{ + unsigned * pSims; + Dar_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->pPars->MaxScore ) +// printf( "Max score is %3d. ", MaxScore ); + // copy the best pattern into the selected pattern + memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords ); + Dar_ManForEachPi( p->pManAig, pObj, i ) + { + pSims = Fra_ObjSim(pObj); + if ( Dar_InfoHasBit(pSims, BestPat) ) + Dar_InfoSetBit(p->pPatWords, i); + } + return MaxScore; +} + +/**Function************************************************************* + + Synopsis [Simulates AIG manager.] + + Description [Assumes that the PI simulation info is attached.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_SimulateOne( Fra_Man_t * p ) +{ + Dar_Obj_t * pObj; + int i, clk; +clk = clock(); + Dar_ManForEachNode( p->pManAig, pObj, i ) + { + Fra_NodeSimulate( p, pObj ); +/* + if ( Dar_ObjFraig(pObj) == NULL ) + printf( "%3d --- -- %d : ", pObj->Id, pObj->fPhase ); + else + printf( "%3d %3d %2d %d : ", pObj->Id, Dar_Regular(Dar_ObjFraig(pObj))->Id, Dar_ObjSatNum(Dar_Regular(Dar_ObjFraig(pObj))), pObj->fPhase ); + Extra_PrintBinary( stdout, Fra_ObjSim(pObj), 30 ); + printf( "\n" ); +*/ + } +p->timeSim += clock() - clk; +p->nSimRounds++; +} + +/**Function************************************************************* + + Synopsis [Resimulates fraiging manager after finding a counter-example.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_Resimulate( Fra_Man_t * p ) +{ + int nChanges; + Fra_AssignDist1( p, p->pPatWords ); + Fra_SimulateOne( p ); + if ( p->pPars->fPatScores ) + Fra_CleanPatScores( p ); + nChanges = Fra_RefineClasses( p ); + nChanges += Fra_RefineClasses1( 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->pPars->fPatScores ) + return; + + // perform additional simulation using dist1 patterns derived from successful patterns + while ( Fra_SelectBestPat(p) > p->pPars->MaxScore ) + { + Fra_AssignDist1( p, p->pPatWords ); + Fra_SimulateOne( p ); + Fra_CleanPatScores( p ); + nChanges = Fra_RefineClasses( p ); + nChanges += Fra_RefineClasses1( p ); + if ( p->pManFraig->pData ) + return; +//printf( "Refined class!!! = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Fra_CountPairsClasses(p) ); + if ( nChanges == 0 ) + break; + } +} + +/**Function************************************************************* + + Synopsis [Performs simulation of the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_Simulate( Fra_Man_t * p ) +{ + int nChanges, nClasses; + // start the classes + Fra_AssignRandom( p ); + Fra_SimulateOne( p ); + Fra_CreateClasses( p ); +//printf( "Starting classes = %5d. Pairs = %6d.\n", p->lClasses.nItems, Fra_CountPairsClasses(p) ); + // refine classes by walking 0/1 patterns + Fra_SavePattern0( p ); + Fra_AssignDist1( p, p->pPatWords ); + Fra_SimulateOne( p ); + nChanges = Fra_RefineClasses( p ); + nChanges += Fra_RefineClasses1( p ); + if ( p->pManFraig ) + return; +//printf( "Refined classes = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Fra_CountPairsClasses(p) ); + Fra_SavePattern1( p ); + Fra_AssignDist1( p, p->pPatWords ); + Fra_SimulateOne( p ); + nChanges = Fra_RefineClasses( p ); + nChanges += Fra_RefineClasses1( p ); + if ( p->pManFraig ) + return; +//printf( "Refined classes = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Fra_CountPairsClasses(p) ); + // refine classes by random simulation + do { + Fra_AssignRandom( p ); + Fra_SimulateOne( p ); + nClasses = Vec_PtrSize(p->vClasses); + nChanges = Fra_RefineClasses( p ); + nChanges += Fra_RefineClasses1( p ); + if ( p->pManFraig ) + return; +//printf( "Refined classes = %5d. Changes = %4d. Pairs = %6d.\n", p->lClasses.nItems, nChanges, Fra_CountPairsClasses(p) ); + } while ( (double)nChanges / nClasses > p->pPars->dSimSatur ); +// Fra_PrintSimClasses( p ); +} + +/**Function************************************************************* + + Synopsis [Creates the counter-example from the successful pattern.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fra_CheckOutputSimsSavePattern( Fra_Man_t * p, Dar_Obj_t * pObj ) +{ + unsigned * pSims; + int i, k, BestPat, * pModel; + // find the word of the pattern + pSims = Fra_ObjSim(pObj); + for ( i = 0; i < p->nSimWords; i++ ) + if ( pSims[i] ) + break; + assert( i < p->nSimWords ); + // 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, Dar_ManPiNum(p->pManFraig) ); + Dar_ManForEachPi( p->pManAig, pObj, i ) + { + pModel[i] = Dar_InfoHasBit(Fra_ObjSim(pObj), 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_CheckOutputSims( Fra_Man_t * p ) +{ + Dar_Obj_t * pObj; + int i; + // make sure the reference simulation pattern does not detect the bug + pObj = Dar_ManPo( p->pManAig, 0 ); + assert( Dar_ObjFanin0(pObj)->fPhase == (unsigned)Dar_ObjFaninC0(pObj) ); // Dar_ObjFaninPhase(Dar_ObjChild0(pObj)) == 0 + Dar_ManForEachPo( p->pManAig, pObj, i ) + { + // complement simulation info +// if ( Dar_ObjFanin0(pObj)->fPhase ^ Dar_ObjFaninC0(pObj) ) // Dar_ObjFaninPhase(Dar_ObjChild0(pObj)) +// Fra_NodeComplementSim( p, Dar_ObjFanin0(pObj) ); + // check + if ( !Fra_NodeHasZeroSim( p, Dar_ObjFanin0(pObj) ) ) + { + // create the counter-example from this pattern + Fra_CheckOutputSimsSavePattern( p, Dar_ObjFanin0(pObj) ); + return 1; + } + // complement simulation info +// if ( Dar_ObjFanin0(pObj)->fPhase ^ Dar_ObjFaninC0(pObj) ) +// Fra_NodeComplementSim( p, Dar_ObjFanin0(pObj) ); + } + return 0; +} + + +//////////////////////////////////////////////////////////////////////// +/// 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 $] + +***********************************************************************/ + +#include "fra.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/fra/ivyFraig.c b/src/aig/fra/ivyFraig.c new file mode 100644 index 00000000..e9a65881 --- /dev/null +++ b/src/aig/fra/ivyFraig.c @@ -0,0 +1,2750 @@ +/**CFile**************************************************************** + + FileName [ivyFraig.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [And-Inverter Graph package.] + + Synopsis [Functional reduction of AIGs] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - May 11, 2006.] + + Revision [$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( "Mitering = %d (%3.1f). Rewriting = %d (%3.1f). Fraiging = %d (%3.1f).\n", + pParams->nMiteringLimitStart, pParams->nMiteringLimitMulti, + pParams->nRewritingLimitStart, pParams->nRewritingLimitMulti, + pParams->nFraigingLimitStart, pParams->nFraigingLimitMulti ); + printf( "Mitering last = %d.\n", + 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) ); + 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) ); + // 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 ); + } + + // 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 ); + } + + // 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/fra/module.make b/src/aig/fra/module.make new file mode 100644 index 00000000..934fbdac --- /dev/null +++ b/src/aig/fra/module.make @@ -0,0 +1,7 @@ +SRC += src/aig/fra/fraAnd.c \ + src/aig/fra/fraClass.c \ + src/aig/fra/fraCnf.c \ + src/aig/fra/fraCore.c \ + src/aig/fra/fraMan.c \ + src/aig/fra/fraSat.c \ + src/aig/fra/fraSim.c |