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Diffstat (limited to 'src/proof/cec')
-rw-r--r-- | src/proof/cec/cecSplit.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/src/proof/cec/cecSplit.c b/src/proof/cec/cecSplit.c new file mode 100644 index 00000000..05bfd9f4 --- /dev/null +++ b/src/proof/cec/cecSplit.c @@ -0,0 +1,213 @@ +/**CFile**************************************************************** + + FileName [cecSplit.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Combinational equivalence checking.] + + Synopsis [Cofactoring for combinational miters.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: cecSplit.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig/gia/gia.h" +#include "bdd/cudd/cuddInt.h" + +ABC_NAMESPACE_IMPL_START + + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Permute primary inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +DdManager * Gia_ManBuildBdd( Gia_Man_t * p, Vec_Ptr_t ** pvNodes, int nSkip ) +{ + abctime clk = Abc_Clock(); + DdManager * dd; + DdNode * bBdd, * bBdd0, * bBdd1; + Vec_Ptr_t * vNodes; + Gia_Obj_t * pObj; + int i; + vNodes = Vec_PtrStart( Gia_ManObjNum(p) ); + dd = Cudd_Init( Gia_ManPiNum(p), 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 ); +// Cudd_AutodynEnable( dd, CUDD_REORDER_SYMM_SIFT ); + bBdd = Cudd_ReadLogicZero(dd); Cudd_Ref( bBdd ); + Vec_PtrWriteEntry( vNodes, 0, bBdd ); + Gia_ManForEachPi( p, pObj, i ) + { + bBdd = i > nSkip ? Cudd_bddIthVar(dd, i) : Cudd_ReadLogicZero(dd); Cudd_Ref( bBdd ); + Vec_PtrWriteEntry( vNodes, Gia_ObjId(p, pObj), bBdd ); + } + Gia_ManForEachAnd( p, pObj, i ) + { + bBdd0 = Cudd_NotCond( (DdNode *)Vec_PtrEntry(vNodes, Gia_ObjFaninId0(pObj, i)), Gia_ObjFaninC0(pObj) ); + bBdd1 = Cudd_NotCond( (DdNode *)Vec_PtrEntry(vNodes, Gia_ObjFaninId1(pObj, i)), Gia_ObjFaninC1(pObj) ); + bBdd = Cudd_bddAnd( dd, bBdd0, bBdd1 ); Cudd_Ref( bBdd ); + Vec_PtrWriteEntry( vNodes, Gia_ObjId(p, pObj), bBdd ); + if ( i % 10 == 0 ) + printf( "%d ", i ); +// if ( i == 3000 ) +// break; + } + printf( "\n" ); + Gia_ManForEachPo( p, pObj, i ) + { + bBdd = Cudd_NotCond( (DdNode *)Vec_PtrEntry(vNodes, Gia_ObjFaninId0(pObj, Gia_ObjId(p, pObj))), Gia_ObjFaninC0(pObj) ); Cudd_Ref( bBdd ); + Vec_PtrWriteEntry( vNodes, Gia_ObjId(p, pObj), bBdd ); + } + if ( bBdd == Cudd_ReadLogicZero(dd) ) + printf( "Equivalent!\n" ); + else + printf( "Not tquivalent!\n" ); + if ( pvNodes ) + *pvNodes = vNodes; + Abc_PrintTime( 1, "Time", Abc_Clock() - clk ); + return dd; +} +void Gia_ManDerefBdd( DdManager * dd, Vec_Ptr_t * vNodes ) +{ + DdNode * bBdd; + int i; + Vec_PtrForEachEntry( DdNode *, vNodes, bBdd, i ) + if ( bBdd ) + Cudd_RecursiveDeref( dd, bBdd ); + if ( Cudd_CheckZeroRef(dd) > 0 ) + printf( "The number of referenced nodes = %d\n", Cudd_CheckZeroRef(dd) ); + Cudd_PrintInfo( dd, stdout ); + Cudd_Quit( dd ); +} +void Gia_ManBuildBddTest( Gia_Man_t * p ) +{ + Vec_Ptr_t * vNodes; + DdManager * dd = Gia_ManBuildBdd( p, &vNodes, 50 ); + Gia_ManDerefBdd( dd, vNodes ); +} + +/**Function************************************************************* + + Synopsis [Permute primary inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Gia_Man_t * Gia_PermuteSpecial( Gia_Man_t * p ) +{ + Vec_Int_t * vPerm; + Gia_Man_t * pNew; + Gia_Obj_t * pObj; + int i, * pOrder; + Gia_ManCreateRefs( p ); + vPerm = Vec_IntAlloc( Gia_ManPiNum(p) ); + Gia_ManForEachPi( p, pObj, i ) + Vec_IntPush( vPerm, Gia_ObjRefNum(p, pObj) ); + pOrder = Abc_QuickSortCost( Vec_IntArray(vPerm), Vec_IntSize(vPerm), 1 ); + Vec_IntFree( vPerm ); + vPerm = Vec_IntAllocArray( pOrder, Gia_ManPiNum(p) ); + pNew = Gia_ManDupPerm( p, vPerm ); + Vec_IntFree( vPerm ); + return pNew; +} + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec_GiaSplitExplore( Gia_Man_t * p ) +{ + Gia_Obj_t * pObj, * pFan0, * pFan1; + int i, Counter = 0; + assert( p->pMuxes == NULL ); + ABC_FREE( p->pRefs ); + Gia_ManCreateRefs( p ); + Gia_ManForEachAnd( p, pObj, i ) + { + if ( !Gia_ObjRecognizeExor(pObj, &pFan0, &pFan1) ) + continue; + if ( Gia_ObjRefNum(p, Gia_ObjFanin0(pObj)) > 1 && + Gia_ObjRefNum(p, Gia_ObjFanin1(pObj)) > 1 ) + continue; + printf( "%5d : ", Counter++ ); + printf( "%2d %2d ", Gia_ObjRefNum(p, Gia_Regular(pFan0)), Gia_ObjRefNum(p, Gia_Regular(pFan1)) ); + printf( "%2d %2d \n", Gia_ObjRefNum(p, Gia_ObjFanin0(pObj)), Gia_ObjRefNum(p, Gia_ObjFanin1(pObj)) ); + } +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Gia_Man_t * Cec_GiaSplitTest( Gia_Man_t * p ) +{ + Gia_Man_t * pNew; +// Gia_Man_t * pMuxes; + Gia_Man_t * pCof; + Gia_Obj_t * pObj; + int i; + pNew = Gia_PermuteSpecial( p ); + Gia_ManCreateRefs( pNew ); + Gia_ManForEachPi( pNew, pObj, i ) + printf( "%d ", Gia_ObjRefNum(pNew, pObj) ); + printf( "\n" ); +// Cec_GiaSplitExplore( pNew ); +// Gia_ManBuildBddTest( p ); +/* + // derive muxes + pMuxes = Gia_ManDupMuxes( pNew ); + printf( "GIA manager has %d ANDs, %d XORs, %d MUXes.\n", + Gia_ManAndNum(pMuxes) - Gia_ManXorNum(pMuxes) - Gia_ManMuxNum(pMuxes), Gia_ManXorNum(pMuxes), Gia_ManMuxNum(pMuxes) ); + Gia_ManStop( pMuxes ); +*/ + pCof = Gia_ManDupDfsRehash( pNew, 20 ); + Gia_ManStop( pNew ); + return pCof; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + +ABC_NAMESPACE_IMPL_END + |