diff options
Diffstat (limited to 'src/aig/gia/giaFadds.c')
| -rw-r--r-- | src/aig/gia/giaFadds.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/src/aig/gia/giaFadds.c b/src/aig/gia/giaFadds.c index 37e9da51..4a3a07ea 100644 --- a/src/aig/gia/giaFadds.c +++ b/src/aig/gia/giaFadds.c @@ -765,7 +765,7 @@ int Gia_ObjFanin1CopyCarry( Vec_Int_t * vCarries, Gia_Obj_t * pObj, int Id ) return Gia_ObjFanin1Copy(pObj); return Abc_LitNotCond( Vec_IntEntry(vCarries, Gia_ObjFaninId1(pObj, Id)), Gia_ObjFaninC1(pObj) ); } -Gia_Man_t * Gia_ManDupWithArtificalFaddBoxes( Gia_Man_t * p, int fUseFanout ) +Gia_Man_t * Gia_ManDupWithArtificalFaddBoxes( Gia_Man_t * p, int fUseFanout, int fXorTrick ) { Gia_Man_t * pNew; Gia_Obj_t * pObj; @@ -821,7 +821,7 @@ Gia_Man_t * Gia_ManDupWithArtificalFaddBoxes( Gia_Man_t * p, int fUseFanout ) pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) ); else // AND-gate with chain { - int iCiLit, iOtherLit, iLit0, iLit1, iLit2; + int iCiLit, iOtherLit, iLit0, iLit1, iLit2, iXorLit; assert( pObj->fMark0 != pObj->fMark1 ); iCiLit = pObj->fMark0 ? Gia_ObjFanin0CopyCarry(vCarries, pObj, i) : Gia_ObjFanin1CopyCarry(vCarries, pObj, i); iOtherLit = pObj->fMark0 ? Gia_ObjFanin1Copy(pObj) : Gia_ObjFanin0Copy(pObj); @@ -835,14 +835,19 @@ Gia_Man_t * Gia_ManDupWithArtificalFaddBoxes( Gia_Man_t * p, int fUseFanout ) Gia_ManAppendCo( pNew, iLit1 ); Gia_ManAppendCo( pNew, iLit2 ); // add CI (unused sum bit) - Gia_ManAppendCi(pNew); + iXorLit = Gia_ManAppendCi(pNew); // add CI (carry bit) pObj->Value = Abc_LitNotCond( Gia_ManAppendCi(pNew), Abc_LitIsCompl(iCiLit) ); if ( vCarries && pObj->fPhase ) { Vec_IntWriteEntry( vCarries, i, pObj->Value ); if ( Gia_ObjRefNum(p, pObj) > 0 ) - pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) ); + { + if ( fXorTrick ) + pObj->Value = Gia_ManAppendAnd( pNew, Abc_LitNotCond(iXorLit, !Abc_LitIsCompl(iCiLit)), iOtherLit ); + else + pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) ); + } } nBoxes++; } @@ -877,7 +882,7 @@ Gia_Man_t * Gia_ManDupWithArtificalFaddBoxesTest( Gia_Man_t * p ) } // output new AIG - pNew = Gia_ManDupWithArtificalFaddBoxes( p, 0 ); + pNew = Gia_ManDupWithArtificalFaddBoxes( p, 0, 0 ); Gia_ManCleanMark01( p ); return pNew; } @@ -1079,7 +1084,7 @@ int Gia_ManIteratePaths( Gia_Man_t * p, int DelayC, int nPathMin, int nPathMax, return 1; } // annotate artificial chains and then put them into boxes -Gia_Man_t * Gia_ManDupWithArtificialBoxes( Gia_Man_t * p, int DelayC, int nPathMin, int nPathMax, int nPathLimit, int fUseFanout, int fIgnoreBoxDelays, int fVerbose ) +Gia_Man_t * Gia_ManDupWithArtificialBoxes( Gia_Man_t * p, int DelayC, int nPathMin, int nPathMax, int nPathLimit, int fUseFanout, int fXorTrick, int fIgnoreBoxDelays, int fVerbose ) { Gia_Man_t * pNew; /* @@ -1090,7 +1095,7 @@ Gia_Man_t * Gia_ManDupWithArtificialBoxes( Gia_Man_t * p, int DelayC, int nPathM } */ Gia_ManIteratePaths( p, DelayC, nPathMin, nPathMax, nPathLimit, fIgnoreBoxDelays, fVerbose ); - pNew = Gia_ManDupWithArtificalFaddBoxes( p, fUseFanout ); + pNew = Gia_ManDupWithArtificalFaddBoxes( p, fUseFanout, fXorTrick ); Gia_ManCleanMark01( p ); return pNew; } |