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Diffstat (limited to 'src/aig/llb/llb3Image.c')
| -rw-r--r-- | src/aig/llb/llb3Image.c | 1093 |
1 files changed, 0 insertions, 1093 deletions
diff --git a/src/aig/llb/llb3Image.c b/src/aig/llb/llb3Image.c deleted file mode 100644 index 09f2700c..00000000 --- a/src/aig/llb/llb3Image.c +++ /dev/null @@ -1,1093 +0,0 @@ -/**CFile**************************************************************** - - FileName [llb3Image.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [BDD based reachability.] - - Synopsis [Computes image using partitioned structure.] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - June 20, 2005.] - - Revision [$Id: llb3Image.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "llbInt.h" - -ABC_NAMESPACE_IMPL_START - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -typedef struct Llb_Var_t_ Llb_Var_t; -struct Llb_Var_t_ -{ - int iVar; // variable number - int nScore; // variable score - Vec_Int_t * vParts; // partitions -}; - -typedef struct Llb_Prt_t_ Llb_Prt_t; -struct Llb_Prt_t_ -{ - int iPart; // partition number - int nSize; // the number of BDD nodes - DdNode * bFunc; // the partition - Vec_Int_t * vVars; // support -}; - -typedef struct Llb_Mgr_t_ Llb_Mgr_t; -struct Llb_Mgr_t_ -{ - Aig_Man_t * pAig; // AIG manager - Vec_Ptr_t * vLeaves; // leaves in the AIG manager - Vec_Ptr_t * vRoots; // roots in the AIG manager - DdManager * dd; // working BDD manager - int * pVars2Q; // variables to quantify - // internal - Llb_Prt_t ** pParts; // partitions - Llb_Var_t ** pVars; // variables - int iPartFree; // next free partition - int nVars; // the number of BDD variables - int nSuppMax; // maximum support size - // temporary - int * pSupp; // temporary support storage -}; - -static inline Llb_Var_t * Llb_MgrVar( Llb_Mgr_t * p, int i ) { return p->pVars[i]; } -static inline Llb_Prt_t * Llb_MgrPart( Llb_Mgr_t * p, int i ) { return p->pParts[i]; } - -// iterator over vars -#define Llb_MgrForEachVar( p, pVar, i ) \ - for ( i = 0; (i < p->nVars) && (((pVar) = Llb_MgrVar(p, i)), 1); i++ ) if ( pVar == NULL ) {} else -// iterator over parts -#define Llb_MgrForEachPart( p, pPart, i ) \ - for ( i = 0; (i < p->iPartFree) && (((pPart) = Llb_MgrPart(p, i)), 1); i++ ) if ( pPart == NULL ) {} else - -// iterator over vars of one partition -#define Llb_PartForEachVar( p, pPart, pVar, i ) \ - for ( i = 0; (i < Vec_IntSize(pPart->vVars)) && (((pVar) = Llb_MgrVar(p, Vec_IntEntry(pPart->vVars,i))), 1); i++ ) -// iterator over parts of one variable -#define Llb_VarForEachPart( p, pVar, pPart, i ) \ - for ( i = 0; (i < Vec_IntSize(pVar->vParts)) && (((pPart) = Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,i))), 1); i++ ) - -// statistics -int timeBuild, timeAndEx, timeOther; -int nSuppMax; - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Removes one variable.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinRemoveVar( Llb_Mgr_t * p, Llb_Var_t * pVar ) -{ - assert( p->pVars[pVar->iVar] == pVar ); - p->pVars[pVar->iVar] = NULL; - Vec_IntFree( pVar->vParts ); - ABC_FREE( pVar ); -} - -/**Function************************************************************* - - Synopsis [Removes one partition.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinRemovePart( Llb_Mgr_t * p, Llb_Prt_t * pPart ) -{ - assert( p->pParts[pPart->iPart] == pPart ); - p->pParts[pPart->iPart] = NULL; - Vec_IntFree( pPart->vVars ); - Cudd_RecursiveDeref( p->dd, pPart->bFunc ); - ABC_FREE( pPart ); -} - -/**Function************************************************************* - - Synopsis [Create cube with singleton variables.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -DdNode * Llb_NonlinCreateCube1( Llb_Mgr_t * p, Llb_Prt_t * pPart ) -{ - DdNode * bCube, * bTemp; - Llb_Var_t * pVar; - int i, TimeStop; - TimeStop = p->dd->TimeStop; p->dd->TimeStop = 0; - bCube = Cudd_ReadOne(p->dd); Cudd_Ref( bCube ); - Llb_PartForEachVar( p, pPart, pVar, i ) - { - assert( Vec_IntSize(pVar->vParts) > 0 ); - if ( Vec_IntSize(pVar->vParts) != 1 ) - continue; - assert( Vec_IntEntry(pVar->vParts, 0) == pPart->iPart ); - bCube = Cudd_bddAnd( p->dd, bTemp = bCube, Cudd_bddIthVar(p->dd, pVar->iVar) ); Cudd_Ref( bCube ); - Cudd_RecursiveDeref( p->dd, bTemp ); - } - Cudd_Deref( bCube ); - p->dd->TimeStop = TimeStop; - return bCube; -} - -/**Function************************************************************* - - Synopsis [Create cube of variables appearing only in two partitions.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -DdNode * Llb_NonlinCreateCube2( Llb_Mgr_t * p, Llb_Prt_t * pPart1, Llb_Prt_t * pPart2 ) -{ - DdNode * bCube, * bTemp; - Llb_Var_t * pVar; - int i, TimeStop; - TimeStop = p->dd->TimeStop; p->dd->TimeStop = 0; - bCube = Cudd_ReadOne(p->dd); Cudd_Ref( bCube ); - Llb_PartForEachVar( p, pPart1, pVar, i ) - { - assert( Vec_IntSize(pVar->vParts) > 0 ); - if ( Vec_IntSize(pVar->vParts) != 2 ) - continue; - if ( (Vec_IntEntry(pVar->vParts, 0) == pPart1->iPart && Vec_IntEntry(pVar->vParts, 1) == pPart2->iPart) || - (Vec_IntEntry(pVar->vParts, 0) == pPart2->iPart && Vec_IntEntry(pVar->vParts, 1) == pPart1->iPart) ) - { - bCube = Cudd_bddAnd( p->dd, bTemp = bCube, Cudd_bddIthVar(p->dd, pVar->iVar) ); Cudd_Ref( bCube ); - Cudd_RecursiveDeref( p->dd, bTemp ); - } - } - Cudd_Deref( bCube ); - p->dd->TimeStop = TimeStop; - return bCube; -} - -/**Function************************************************************* - - Synopsis [Returns 1 if partition has singleton variables.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Llb_NonlinHasSingletonVars( Llb_Mgr_t * p, Llb_Prt_t * pPart ) -{ - Llb_Var_t * pVar; - int i; - Llb_PartForEachVar( p, pPart, pVar, i ) - if ( Vec_IntSize(pVar->vParts) == 1 ) - return 1; - return 0; -} - -/**Function************************************************************* - - Synopsis [Returns 1 if partition has singleton variables.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinPrint( Llb_Mgr_t * p ) -{ - Llb_Prt_t * pPart; - Llb_Var_t * pVar; - int i, k; - printf( "\n" ); - Llb_MgrForEachVar( p, pVar, i ) - { - printf( "Var %3d : ", i ); - Llb_VarForEachPart( p, pVar, pPart, k ) - printf( "%d ", pPart->iPart ); - printf( "\n" ); - } - Llb_MgrForEachPart( p, pPart, i ) - { - printf( "Part %3d : ", i ); - Llb_PartForEachVar( p, pPart, pVar, k ) - printf( "%d ", pVar->iVar ); - printf( "\n" ); - } -} - -/**Function************************************************************* - - Synopsis [Quantifies singles belonging to one partition.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Llb_NonlinQuantify1( Llb_Mgr_t * p, Llb_Prt_t * pPart, int fSubset ) -{ - Llb_Var_t * pVar; - Llb_Prt_t * pTemp; - Vec_Ptr_t * vSingles; - DdNode * bCube, * bTemp; - int i, RetValue, nSizeNew; - if ( fSubset ) - { - int Length; -// int nSuppSize = Cudd_SupportSize( p->dd, pPart->bFunc ); -// pPart->bFunc = Cudd_SubsetHeavyBranch( p->dd, bTemp = pPart->bFunc, nSuppSize, 3*pPart->nSize/4 ); Cudd_Ref( pPart->bFunc ); - pPart->bFunc = Cudd_LargestCube( p->dd, bTemp = pPart->bFunc, &Length ); Cudd_Ref( pPart->bFunc ); - - printf( "Subsetting %3d : ", pPart->iPart ); - printf( "(Supp =%3d Node =%5d) -> ", Cudd_SupportSize(p->dd, bTemp), Cudd_DagSize(bTemp) ); - printf( "(Supp =%3d Node =%5d)\n", Cudd_SupportSize(p->dd, pPart->bFunc), Cudd_DagSize(pPart->bFunc) ); - - RetValue = (Cudd_DagSize(bTemp) == Cudd_DagSize(pPart->bFunc)); - - Cudd_RecursiveDeref( p->dd, bTemp ); - - if ( RetValue ) - return 1; - } - else - { - // create cube to be quantified - bCube = Llb_NonlinCreateCube1( p, pPart ); Cudd_Ref( bCube ); -// assert( !Cudd_IsConstant(bCube) ); - // derive new function - pPart->bFunc = Cudd_bddExistAbstract( p->dd, bTemp = pPart->bFunc, bCube ); Cudd_Ref( pPart->bFunc ); - Cudd_RecursiveDeref( p->dd, bTemp ); - Cudd_RecursiveDeref( p->dd, bCube ); - } - // get support - vSingles = Vec_PtrAlloc( 0 ); - nSizeNew = Cudd_DagSize(pPart->bFunc); - Extra_SupportArray( p->dd, pPart->bFunc, p->pSupp ); - Llb_PartForEachVar( p, pPart, pVar, i ) - if ( p->pSupp[pVar->iVar] ) - { - assert( Vec_IntSize(pVar->vParts) > 1 ); - pVar->nScore -= pPart->nSize - nSizeNew; - } - else - { - RetValue = Vec_IntRemove( pVar->vParts, pPart->iPart ); - assert( RetValue ); - pVar->nScore -= pPart->nSize; - if ( Vec_IntSize(pVar->vParts) == 0 ) - Llb_NonlinRemoveVar( p, pVar ); - else if ( Vec_IntSize(pVar->vParts) == 1 ) - Vec_PtrPushUnique( vSingles, Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0)) ); - } - - // update partition - pPart->nSize = nSizeNew; - Vec_IntClear( pPart->vVars ); - for ( i = 0; i < p->nVars; i++ ) - if ( p->pSupp[i] && p->pVars2Q[i] ) - Vec_IntPush( pPart->vVars, i ); - // remove other variables - Vec_PtrForEachEntry( Llb_Prt_t *, vSingles, pTemp, i ) - Llb_NonlinQuantify1( p, pTemp, 0 ); - Vec_PtrFree( vSingles ); - return 0; -} - -/**Function************************************************************* - - Synopsis [Quantifies singles belonging to one partition.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Llb_NonlinQuantify2( Llb_Mgr_t * p, Llb_Prt_t * pPart1, Llb_Prt_t * pPart2, int Limit, int TimeOut ) -{ - int fVerbose = 0; - Llb_Var_t * pVar; - Llb_Prt_t * pTemp; - Vec_Ptr_t * vSingles; - DdNode * bCube, * bFunc; - int i, RetValue, nSuppSize; - int iPart1 = pPart1->iPart; - int iPart2 = pPart2->iPart; - - // create cube to be quantified - bCube = Llb_NonlinCreateCube2( p, pPart1, pPart2 ); Cudd_Ref( bCube ); -if ( fVerbose ) -{ -printf( "\n" ); -printf( "\n" ); -Llb_NonlinPrint( p ); -printf( "Conjoining partitions %d and %d.\n", pPart1->iPart, pPart2->iPart ); -Extra_bddPrintSupport( p->dd, bCube ); printf( "\n" ); -} - - // derive new function -// bFunc = Cudd_bddAndAbstract( p->dd, pPart1->bFunc, pPart2->bFunc, bCube ); Cudd_Ref( bFunc ); -/* - bFunc = Cudd_bddAndAbstractLimit( p->dd, pPart1->bFunc, pPart2->bFunc, bCube, Limit ); - if ( bFunc == NULL ) - { - int RetValue; - Cudd_RecursiveDeref( p->dd, bCube ); - if ( pPart1->nSize < pPart2->nSize ) - RetValue = Llb_NonlinQuantify1( p, pPart1, 1 ); - else - RetValue = Llb_NonlinQuantify1( p, pPart2, 1 ); - if ( RetValue ) - Limit = Limit + 1000; - Llb_NonlinQuantify2( p, pPart1, pPart2, Limit, TimeOut ); - return 0; - } - Cudd_Ref( bFunc ); -*/ - -// bFunc = Extra_bddAndAbstractTime( p->dd, pPart1->bFunc, pPart2->bFunc, bCube, TimeOut ); - bFunc = Cudd_bddAndAbstract( p->dd, pPart1->bFunc, pPart2->bFunc, bCube ); - if ( bFunc == NULL ) - { - Cudd_RecursiveDeref( p->dd, bCube ); - return 0; - } - Cudd_Ref( bFunc ); - Cudd_RecursiveDeref( p->dd, bCube ); - - // create new partition - pTemp = p->pParts[p->iPartFree] = ABC_CALLOC( Llb_Prt_t, 1 ); - pTemp->iPart = p->iPartFree++; - pTemp->nSize = Cudd_DagSize(bFunc); - pTemp->bFunc = bFunc; - pTemp->vVars = Vec_IntAlloc( 8 ); - // update variables - Llb_PartForEachVar( p, pPart1, pVar, i ) - { - RetValue = Vec_IntRemove( pVar->vParts, pPart1->iPart ); - assert( RetValue ); - pVar->nScore -= pPart1->nSize; - } - // update variables - Llb_PartForEachVar( p, pPart2, pVar, i ) - { - RetValue = Vec_IntRemove( pVar->vParts, pPart2->iPart ); - assert( RetValue ); - pVar->nScore -= pPart2->nSize; - } - // add variables to the new partition - nSuppSize = 0; - Extra_SupportArray( p->dd, bFunc, p->pSupp ); - for ( i = 0; i < p->nVars; i++ ) - { - nSuppSize += p->pSupp[i]; - if ( p->pSupp[i] && p->pVars2Q[i] ) - { - pVar = Llb_MgrVar( p, i ); - pVar->nScore += pTemp->nSize; - Vec_IntPush( pVar->vParts, pTemp->iPart ); - Vec_IntPush( pTemp->vVars, i ); - } - } - p->nSuppMax = ABC_MAX( p->nSuppMax, nSuppSize ); - // remove variables and collect partitions with singleton variables - vSingles = Vec_PtrAlloc( 0 ); - Llb_PartForEachVar( p, pPart1, pVar, i ) - { - if ( Vec_IntSize(pVar->vParts) == 0 ) - Llb_NonlinRemoveVar( p, pVar ); - else if ( Vec_IntSize(pVar->vParts) == 1 ) - { - if ( fVerbose ) - printf( "Adding partition %d because of var %d.\n", - Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0))->iPart, pVar->iVar ); - Vec_PtrPushUnique( vSingles, Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0)) ); - } - } - Llb_PartForEachVar( p, pPart2, pVar, i ) - { - if ( pVar == NULL ) - continue; - if ( Vec_IntSize(pVar->vParts) == 0 ) - Llb_NonlinRemoveVar( p, pVar ); - else if ( Vec_IntSize(pVar->vParts) == 1 ) - { - if ( fVerbose ) - printf( "Adding partition %d because of var %d.\n", - Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0))->iPart, pVar->iVar ); - Vec_PtrPushUnique( vSingles, Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0)) ); - } - } - // remove partitions - Llb_NonlinRemovePart( p, pPart1 ); - Llb_NonlinRemovePart( p, pPart2 ); - // remove other variables -if ( fVerbose ) -Llb_NonlinPrint( p ); - Vec_PtrForEachEntry( Llb_Prt_t *, vSingles, pTemp, i ) - { -if ( fVerbose ) -printf( "Updating partitiong %d with singlton vars.\n", pTemp->iPart ); - Llb_NonlinQuantify1( p, pTemp, 0 ); - } -if ( fVerbose ) -Llb_NonlinPrint( p ); - Vec_PtrFree( vSingles ); - return 1; -} - -/**Function************************************************************* - - Synopsis [Computes volume of the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinCutNodes_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes ) -{ - if ( Aig_ObjIsTravIdCurrent(p, pObj) ) - return; - Aig_ObjSetTravIdCurrent(p, pObj); - if ( Saig_ObjIsLi(p, pObj) ) - { - Llb_NonlinCutNodes_rec(p, Aig_ObjFanin0(pObj), vNodes); - return; - } - if ( Aig_ObjIsConst1(pObj) ) - return; - assert( Aig_ObjIsNode(pObj) ); - Llb_NonlinCutNodes_rec(p, Aig_ObjFanin0(pObj), vNodes); - Llb_NonlinCutNodes_rec(p, Aig_ObjFanin1(pObj), vNodes); - Vec_PtrPush( vNodes, pObj ); -} - -/**Function************************************************************* - - Synopsis [Computes volume of the cut.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Vec_Ptr_t * Llb_NonlinCutNodes( Aig_Man_t * p, Vec_Ptr_t * vLower, Vec_Ptr_t * vUpper ) -{ - Vec_Ptr_t * vNodes; - Aig_Obj_t * pObj; - int i; - // mark the lower cut with the traversal ID - Aig_ManIncrementTravId(p); - Vec_PtrForEachEntry( Aig_Obj_t *, vLower, pObj, i ) - Aig_ObjSetTravIdCurrent( p, pObj ); - // count the upper cut - vNodes = Vec_PtrAlloc( 100 ); - Vec_PtrForEachEntry( Aig_Obj_t *, vUpper, pObj, i ) - Llb_NonlinCutNodes_rec( p, pObj, vNodes ); - return vNodes; -} - -/**Function************************************************************* - - Synopsis [Returns array of BDDs for the roots in terms of the leaves.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Vec_Ptr_t * Llb_NonlinBuildBdds( Aig_Man_t * p, Vec_Ptr_t * vLower, Vec_Ptr_t * vUpper, DdManager * dd, int TimeOut ) -{ - Vec_Ptr_t * vNodes, * vResult; - Aig_Obj_t * pObj; - DdNode * bBdd0, * bBdd1, * bProd; - int i, k; - - Aig_ManConst1(p)->pData = Cudd_ReadOne( dd ); - Vec_PtrForEachEntry( Aig_Obj_t *, vLower, pObj, i ) - pObj->pData = Cudd_bddIthVar( dd, Aig_ObjId(pObj) ); - - vNodes = Llb_NonlinCutNodes( p, vLower, vUpper ); - Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i ) - { - bBdd0 = Cudd_NotCond( (DdNode *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) ); - bBdd1 = Cudd_NotCond( (DdNode *)Aig_ObjFanin1(pObj)->pData, Aig_ObjFaninC1(pObj) ); -// pObj->pData = Extra_bddAndTime( dd, bBdd0, bBdd1, TimeOut ); - pObj->pData = Cudd_bddAnd( dd, bBdd0, bBdd1 ); - if ( pObj->pData == NULL ) - { - Vec_PtrForEachEntryStop( Aig_Obj_t *, vNodes, pObj, k, i ) - if ( pObj->pData ) - Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData ); - Vec_PtrFree( vNodes ); - return NULL; - } - Cudd_Ref( (DdNode *)pObj->pData ); - } - - vResult = Vec_PtrAlloc( 100 ); - Vec_PtrForEachEntry( Aig_Obj_t *, vUpper, pObj, i ) - { - if ( Aig_ObjIsNode(pObj) ) - { - bProd = Cudd_bddXnor( dd, Cudd_bddIthVar(dd, Aig_ObjId(pObj)), (DdNode *)pObj->pData ); Cudd_Ref( bProd ); - } - else - { - assert( Saig_ObjIsLi(p, pObj) ); - bBdd0 = Cudd_NotCond( (DdNode *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) ); - bProd = Cudd_bddXnor( dd, Cudd_bddIthVar(dd, Aig_ObjId(pObj)), bBdd0 ); Cudd_Ref( bProd ); - } - Vec_PtrPush( vResult, bProd ); - } - Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i ) - Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData ); - - Vec_PtrFree( vNodes ); - return vResult; -} - -/**Function************************************************************* - - Synopsis [Starts non-linear quantification scheduling.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinAddPair( Llb_Mgr_t * p, DdNode * bFunc, int iPart, int iVar ) -{ - if ( p->pVars[iVar] == NULL ) - { - p->pVars[iVar] = ABC_CALLOC( Llb_Var_t, 1 ); - p->pVars[iVar]->iVar = iVar; - p->pVars[iVar]->nScore = 0; - p->pVars[iVar]->vParts = Vec_IntAlloc( 8 ); - } - Vec_IntPush( p->pVars[iVar]->vParts, iPart ); - Vec_IntPush( p->pParts[iPart]->vVars, iVar ); -} - -/**Function************************************************************* - - Synopsis [Starts non-linear quantification scheduling.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinAddPartition( Llb_Mgr_t * p, int i, DdNode * bFunc ) -{ - int k, nSuppSize; - assert( !Cudd_IsConstant(bFunc) ); - // create partition - p->pParts[i] = ABC_CALLOC( Llb_Prt_t, 1 ); - p->pParts[i]->iPart = i; - p->pParts[i]->bFunc = bFunc; - p->pParts[i]->vVars = Vec_IntAlloc( 8 ); - // add support dependencies - nSuppSize = 0; - Extra_SupportArray( p->dd, bFunc, p->pSupp ); - for ( k = 0; k < p->nVars; k++ ) - { - nSuppSize += p->pSupp[k]; - if ( p->pSupp[k] && p->pVars2Q[k] ) - Llb_NonlinAddPair( p, bFunc, i, k ); - } - p->nSuppMax = ABC_MAX( p->nSuppMax, nSuppSize ); -} - -/**Function************************************************************* - - Synopsis [Starts non-linear quantification scheduling.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Llb_NonlinStart( Llb_Mgr_t * p, int TimeOut ) -{ - Vec_Ptr_t * vRootBdds; - DdNode * bFunc; - int i; - // create and collect BDDs - vRootBdds = Llb_NonlinBuildBdds( p->pAig, p->vLeaves, p->vRoots, p->dd, TimeOut ); // come referenced - if ( vRootBdds == NULL ) - return 0; - // add pairs (refs are consumed inside) - Vec_PtrForEachEntry( DdNode *, vRootBdds, bFunc, i ) - Llb_NonlinAddPartition( p, i, bFunc ); - Vec_PtrFree( vRootBdds ); - return 1; -} - -/**Function************************************************************* - - Synopsis [Checks that each var appears in at least one partition.] - - Description [] - - SideEffects [] - - SeeAlso [] -**********************************************************************/ -void Llb_NonlinCheckVars( Llb_Mgr_t * p ) -{ - Llb_Var_t * pVar; - int i; - Llb_MgrForEachVar( p, pVar, i ) - assert( Vec_IntSize(pVar->vParts) > 1 ); -} - -/**Function************************************************************* - - Synopsis [Find next partition to quantify] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Llb_NonlinNextPartitions( Llb_Mgr_t * p, Llb_Prt_t ** ppPart1, Llb_Prt_t ** ppPart2 ) -{ - Llb_Var_t * pVar, * pVarBest = NULL; - Llb_Prt_t * pPart, * pPart1Best = NULL, * pPart2Best = NULL; - int i; - Llb_NonlinCheckVars( p ); - // find variable with minimum score - Llb_MgrForEachVar( p, pVar, i ) - if ( pVarBest == NULL || pVarBest->nScore > pVar->nScore ) - pVarBest = pVar; - if ( pVarBest == NULL ) - return 0; - // find two partitions with minimum size - Llb_VarForEachPart( p, pVarBest, pPart, i ) - { - if ( pPart1Best == NULL ) - pPart1Best = pPart; - else if ( pPart2Best == NULL ) - pPart2Best = pPart; - else if ( pPart1Best->nSize > pPart->nSize || pPart2Best->nSize > pPart->nSize ) - { - if ( pPart1Best->nSize > pPart2Best->nSize ) - pPart1Best = pPart; - else - pPart2Best = pPart; - } - } - *ppPart1 = pPart1Best; - *ppPart2 = pPart2Best; - return 1; -} - -/**Function************************************************************* - - Synopsis [Reorders BDDs in the working manager.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinReorder( DdManager * dd, int fTwice, int fVerbose ) -{ - int clk = clock(); - if ( fVerbose ) - Abc_Print( 1, "Reordering... Before =%5d. ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) ); - Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 100 ); - if ( fVerbose ) - Abc_Print( 1, "After =%5d. ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) ); - if ( fTwice ) - { - Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 100 ); - if ( fVerbose ) - Abc_Print( 1, "After =%5d. ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) ); - } - if ( fVerbose ) - Abc_PrintTime( 1, "Time", clock() - clk ); -} - -/**Function************************************************************* - - Synopsis [Recomputes scores after variable reordering.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinRecomputeScores( Llb_Mgr_t * p ) -{ - Llb_Prt_t * pPart; - Llb_Var_t * pVar; - int i, k; - Llb_MgrForEachPart( p, pPart, i ) - pPart->nSize = Cudd_DagSize(pPart->bFunc); - Llb_MgrForEachVar( p, pVar, i ) - { - pVar->nScore = 0; - Llb_VarForEachPart( p, pVar, pPart, k ) - pVar->nScore += pPart->nSize; - } -} - -/**Function************************************************************* - - Synopsis [Recomputes scores after variable reordering.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinVerifyScores( Llb_Mgr_t * p ) -{ - Llb_Prt_t * pPart; - Llb_Var_t * pVar; - int i, k, nScore; - Llb_MgrForEachPart( p, pPart, i ) - assert( pPart->nSize == Cudd_DagSize(pPart->bFunc) ); - Llb_MgrForEachVar( p, pVar, i ) - { - nScore = 0; - Llb_VarForEachPart( p, pVar, pPart, k ) - nScore += pPart->nSize; - assert( nScore == pVar->nScore ); - } -} - -/**Function************************************************************* - - Synopsis [Starts non-linear quantification scheduling.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -Llb_Mgr_t * Llb_NonlinAlloc( Aig_Man_t * pAig, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vRoots, int * pVars2Q, DdManager * dd ) -{ - Llb_Mgr_t * p; - p = ABC_CALLOC( Llb_Mgr_t, 1 ); - p->pAig = pAig; - p->vLeaves = vLeaves; - p->vRoots = vRoots; - p->dd = dd; - p->pVars2Q = pVars2Q; - p->nVars = Cudd_ReadSize(dd); - p->iPartFree = Vec_PtrSize(vRoots); - p->pVars = ABC_CALLOC( Llb_Var_t *, p->nVars ); - p->pParts = ABC_CALLOC( Llb_Prt_t *, 2 * p->iPartFree + 2 ); - p->pSupp = ABC_ALLOC( int, Cudd_ReadSize(dd) ); - return p; -} - -/**Function************************************************************* - - Synopsis [Stops non-linear quantification scheduling.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinFree( Llb_Mgr_t * p ) -{ - Llb_Prt_t * pPart; - Llb_Var_t * pVar; - int i; - Llb_MgrForEachVar( p, pVar, i ) - Llb_NonlinRemoveVar( p, pVar ); - Llb_MgrForEachPart( p, pPart, i ) - Llb_NonlinRemovePart( p, pPart ); - ABC_FREE( p->pVars ); - ABC_FREE( p->pParts ); - ABC_FREE( p->pSupp ); - ABC_FREE( p ); -} - -/**Function************************************************************* - - Synopsis [Performs image computation.] - - Description [Computes image of BDDs (vFuncs).] - - SideEffects [BDDs in vFuncs are derefed inside. The result is refed.] - - SeeAlso [] - -***********************************************************************/ -DdNode * Llb_NonlinImage( Aig_Man_t * pAig, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vRoots, int * pVars2Q, - DdManager * dd, DdNode * bCurrent, int fReorder, int fVerbose, int * pOrder, int Limit, int TimeOut ) -{ - Llb_Prt_t * pPart, * pPart1, * pPart2; - Llb_Mgr_t * p; - DdNode * bFunc, * bTemp; - int i, nReorders, timeInside; - int clk = clock(), clk2; - // start the manager - clk2 = clock(); - p = Llb_NonlinAlloc( pAig, vLeaves, vRoots, pVars2Q, dd ); - if ( !Llb_NonlinStart( p, TimeOut ) ) - { - Llb_NonlinFree( p ); - return NULL; - } - // add partition - Llb_NonlinAddPartition( p, p->iPartFree++, bCurrent ); - // remove singles - Llb_MgrForEachPart( p, pPart, i ) - if ( Llb_NonlinHasSingletonVars(p, pPart) ) - Llb_NonlinQuantify1( p, pPart, 0 ); - timeBuild += clock() - clk2; - timeInside = clock() - clk2; - // compute scores - Llb_NonlinRecomputeScores( p ); - // save permutation - if ( pOrder ) - memcpy( pOrder, dd->invperm, sizeof(int) * dd->size ); - // iteratively quantify variables - while ( Llb_NonlinNextPartitions(p, &pPart1, &pPart2) ) - { - clk2 = clock(); - nReorders = Cudd_ReadReorderings(dd); - if ( !Llb_NonlinQuantify2( p, pPart1, pPart2, Limit, TimeOut ) ) - { - Llb_NonlinFree( p ); - return NULL; - } - timeAndEx += clock() - clk2; - timeInside += clock() - clk2; - if ( nReorders < Cudd_ReadReorderings(dd) ) - Llb_NonlinRecomputeScores( p ); -// else -// Llb_NonlinVerifyScores( p ); - } - // load partitions - bFunc = Cudd_ReadOne(p->dd); Cudd_Ref( bFunc ); - Llb_MgrForEachPart( p, pPart, i ) - { - bFunc = Cudd_bddAnd( p->dd, bTemp = bFunc, pPart->bFunc ); Cudd_Ref( bFunc ); - Cudd_RecursiveDeref( p->dd, bTemp ); - } - nSuppMax = p->nSuppMax; - Llb_NonlinFree( p ); - // reorder variables - if ( fReorder ) - Llb_NonlinReorder( dd, 0, fVerbose ); - timeOther += clock() - clk - timeInside; - // return - Cudd_Deref( bFunc ); - return bFunc; -} - - - -static Llb_Mgr_t * p = NULL; - -/**Function************************************************************* - - Synopsis [Starts image computation manager.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -DdManager * Llb_NonlinImageStart( Aig_Man_t * pAig, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vRoots, int * pVars2Q, int * pOrder, int fFirst, int TimeTarget ) -{ - DdManager * dd; - int clk = clock(); - assert( p == NULL ); - // start a new manager (disable reordering) - dd = Cudd_Init( Aig_ManObjNumMax(pAig), 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 ); - dd->TimeStop = TimeTarget; - Cudd_ShuffleHeap( dd, pOrder ); -// if ( fFirst ) - Cudd_AutodynEnable( dd, CUDD_REORDER_SYMM_SIFT ); - // start the manager - p = Llb_NonlinAlloc( pAig, vLeaves, vRoots, pVars2Q, dd ); - if ( !Llb_NonlinStart( p, 0 ) ) - { - Llb_NonlinFree( p ); - p = NULL; - return NULL; - } - timeBuild += clock() - clk; -// if ( !fFirst ) -// Cudd_AutodynEnable( dd, CUDD_REORDER_SYMM_SIFT ); - return dd; -} - -/**Function************************************************************* - - Synopsis [Performs image computation.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -DdNode * Llb_NonlinImageCompute( DdNode * bCurrent, int fReorder, int fDrop, int fVerbose, int * pOrder ) -{ - Llb_Prt_t * pPart, * pPart1, * pPart2; - DdNode * bFunc, * bTemp; - int i, nReorders, timeInside = 0; - int clk = clock(), clk2; - - // add partition - Llb_NonlinAddPartition( p, p->iPartFree++, bCurrent ); - // remove singles - Llb_MgrForEachPart( p, pPart, i ) - if ( Llb_NonlinHasSingletonVars(p, pPart) ) - Llb_NonlinQuantify1( p, pPart, 0 ); - // reorder - if ( fReorder ) - Llb_NonlinReorder( p->dd, 0, 0 ); - // save permutation - memcpy( pOrder, p->dd->invperm, sizeof(int) * p->dd->size ); - - // compute scores - Llb_NonlinRecomputeScores( p ); - // iteratively quantify variables - while ( Llb_NonlinNextPartitions(p, &pPart1, &pPart2) ) - { - clk2 = clock(); - nReorders = Cudd_ReadReorderings(p->dd); - if ( !Llb_NonlinQuantify2( p, pPart1, pPart2, 0, 0 ) ) - { - Llb_NonlinFree( p ); - return NULL; - } - timeAndEx += clock() - clk2; - timeInside += clock() - clk2; - if ( nReorders < Cudd_ReadReorderings(p->dd) ) - Llb_NonlinRecomputeScores( p ); -// else -// Llb_NonlinVerifyScores( p ); - } - // load partitions - bFunc = Cudd_ReadOne(p->dd); Cudd_Ref( bFunc ); - Llb_MgrForEachPart( p, pPart, i ) - { - bFunc = Cudd_bddAnd( p->dd, bTemp = bFunc, pPart->bFunc ); - if ( bFunc == NULL ) - { - Cudd_RecursiveDeref( p->dd, bTemp ); - Llb_NonlinFree( p ); - return NULL; - } - Cudd_Ref( bFunc ); - Cudd_RecursiveDeref( p->dd, bTemp ); - } - nSuppMax = p->nSuppMax; - // reorder variables -// if ( fReorder ) -// Llb_NonlinReorder( p->dd, 0, fVerbose ); - // save permutation -// memcpy( pOrder, p->dd->invperm, sizeof(int) * Cudd_ReadSize(p->dd) ); - - timeOther += clock() - clk - timeInside; - // return - Cudd_Deref( bFunc ); - return bFunc; -} - -/**Function************************************************************* - - Synopsis [Quits image computation manager.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Llb_NonlinImageQuit() -{ - DdManager * dd; - if ( p == NULL ) - return; - dd = p->dd; - Llb_NonlinFree( p ); - if ( dd->bFunc ) - Cudd_RecursiveDeref( dd, dd->bFunc ); - Extra_StopManager( dd ); -// Cudd_Quit ( dd ); - p = NULL; -} - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - -ABC_NAMESPACE_IMPL_END - |