diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/aig/gia/giaEquiv.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/aig/gia/giaEquiv.c b/src/aig/gia/giaEquiv.c index c987453f..224d9c4d 100644 --- a/src/aig/gia/giaEquiv.c +++ b/src/aig/gia/giaEquiv.c @@ -2707,6 +2707,117 @@ void Gia_ManTransferTest( Gia_Man_t * p ) Gia_ManStop( pNew ); } + +/**Function************************************************************* + + Synopsis [Converting AIG after SAT sweeping into AIG with choices.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cec4_ManMarkIndependentClasses_rec( Gia_Man_t * p, int iObj ) +{ + Gia_Obj_t * pObj; + assert( iObj > 0 ); + if ( Gia_ObjIsTravIdPreviousId(p, iObj) ) // failed + return 0; + if ( Gia_ObjIsTravIdCurrentId(p, iObj) ) // passed + return 1; + Gia_ObjSetTravIdCurrentId(p, iObj); + pObj = Gia_ManObj( p, iObj ); + if ( Gia_ObjIsCi(pObj) ) + return 1; + assert( Gia_ObjIsAnd(pObj) ); + if ( Cec4_ManMarkIndependentClasses_rec( p, Gia_ObjFaninId0(pObj, iObj) ) && + Cec4_ManMarkIndependentClasses_rec( p, Gia_ObjFaninId1(pObj, iObj) ) ) + return 1; + Gia_ObjSetTravIdPreviousId(p, iObj); + return 0; +} +int Cec4_ManMarkIndependentClasses( Gia_Man_t * p, Gia_Man_t * pNew ) +{ + int iObjNew, iRepr, iObj, Res, fHaveChoices = 0; + Gia_ManCleanMark01(p); + Gia_ManForEachClass( p, iRepr ) + { + Gia_ManIncrementTravId( pNew ); + Gia_ManIncrementTravId( pNew ); + iObjNew = Abc_Lit2Var( Gia_ManObj(p, iRepr)->Value ); + Res = Cec4_ManMarkIndependentClasses_rec( pNew, iObjNew ); + assert( Res == 1 ); + Gia_ObjSetTravIdPreviousId( pNew, iObjNew ); + p->pReprs[iRepr].fColorA = 1; + Gia_ClassForEachObj1( p, iRepr, iObj ) + { + assert( p->pReprs[iObj].iRepr == (unsigned)iRepr ); + iObjNew = Abc_Lit2Var( Gia_ManObj(p, iObj)->Value ); + if ( Cec4_ManMarkIndependentClasses_rec( pNew, iObjNew ) ) + { + p->pReprs[iObj].fColorA = 1; + fHaveChoices = 1; + } + Gia_ObjSetTravIdPreviousId( pNew, iObjNew ); + } + } + return fHaveChoices; +} +int Cec4_ManSatSolverAnd_rec( Gia_Man_t * pCho, Gia_Man_t * p, Gia_Man_t * pNew, int iObj ) +{ + return 0; +} +int Cec4_ManSatSolverChoices_rec( Gia_Man_t * pCho, Gia_Man_t * p, Gia_Man_t * pNew, int iObj ) +{ + if ( !Gia_ObjIsClass(p, iObj) ) + return Cec4_ManSatSolverAnd_rec( pCho, p, pNew, iObj ); + else + { + Vec_Int_t * vLits = Vec_IntAlloc( 100 ); + int i, iHead, iNext, iRepr = Gia_ObjIsHead(p, iObj) ? iObj : Gia_ObjRepr(p, iObj); + Gia_ClassForEachObj( p, iRepr, iObj ) + if ( p->pReprs[iObj].fColorA ) + Vec_IntPush( vLits, Cec4_ManSatSolverAnd_rec( pCho, p, pNew, iObj ) ); + Vec_IntSort( vLits, 1 ); + iHead = Abc_Lit2Var( Vec_IntEntry(vLits, 0) ); + if ( Vec_IntSize(vLits) > 1 ) + { + Vec_IntForEachEntryStart( vLits, iNext, i, 1 ) + { + pCho->pSibls[iHead] = Abc_Lit2Var(iNext); + iHead = Abc_Lit2Var(iNext); + } + } + return Abc_LitNotCond( Vec_IntEntry(vLits, 0), Gia_ManObj(p, iHead)->fPhase ); + } +} +Gia_Man_t * Cec4_ManSatSolverChoices( Gia_Man_t * p, Gia_Man_t * pNew ) +{ + Gia_Man_t * pCho; + Gia_Obj_t * pObj; + int i, DriverId; + // mark topologically dependent equivalent nodes + if ( !Cec4_ManMarkIndependentClasses( p, pNew ) ) + return Gia_ManDup( pNew ); + // rebuild AIG in a different order with choices + pCho = Gia_ManStart( Gia_ManObjNum(pNew) ); + pCho->pName = Abc_UtilStrsav( p->pName ); + pCho->pSpec = Abc_UtilStrsav( p->pSpec ); + pCho->pSibls = ABC_CALLOC( int, Gia_ManObjNum(pNew) ); + Gia_ManFillValue(pNew); + Gia_ManConst0(pNew)->Value = 0; + for ( i = 0; i < Gia_ManCiNum(pNew); i++ ) + Gia_ManCi(pNew, i)->Value = Gia_ManAppendCi( pCho ); + Gia_ManForEachCoDriverId( p, DriverId, i ) + Cec4_ManSatSolverChoices_rec( pCho, p, pNew, DriverId ); + Gia_ManForEachCo( pNew, pObj, i ) + pObj->Value = Gia_ManAppendCo( pCho, Gia_ObjFanin0Copy(pObj) ); + Gia_ManSetRegNum( pCho, Gia_ManRegNum(p) ); + return pCho; +} + //////////////////////////////////////////////////////////////////////// /// END OF FILE /// //////////////////////////////////////////////////////////////////////// |