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-rw-r--r--src/aig/gia/giaFadds.c19
-rw-r--r--src/base/abci/abc.c14
2 files changed, 21 insertions, 12 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;
}
diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index 1b21672c..14d6ddbe 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -36947,12 +36947,12 @@ usage:
int Abc_CommandAbc9Fadds( Abc_Frame_t * pAbc, int argc, char ** argv )
{
extern Gia_Man_t * Gia_ManDupWithNaturalBoxes( Gia_Man_t * p, int nFaddMin, int fVerbose );
- extern Gia_Man_t * Gia_ManDupWithArtificialBoxes( Gia_Man_t * p, int DelayC, int nPathMin, int nPathMax, int nPathLimit, int fUseFanout, int fIgnoreBoxDelays, int fVerbose );
+ extern 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 * pTemp, * pTemp2;
int c, nFaddMin = 3, fUseNat = 0, fUseArt = 0, fVerbose = 0;
- int DelayC = 0, nPathMin = 3, nPathMax = 32, nPathLimit = 50, fUseFanout = 0, fIgnoreBoxDelays = 0;
+ int DelayC = 0, nPathMin = 3, nPathMax = 32, nPathLimit = 50, fUseFanout = 0, fUseXorTrick = 0, fIgnoreBoxDelays = 0;
Extra_UtilGetoptReset();
- while ( ( c = Extra_UtilGetopt( argc, argv, "NBSLPnafbvh" ) ) != EOF )
+ while ( ( c = Extra_UtilGetopt( argc, argv, "NBSLPnafxbvh" ) ) != EOF )
{
switch ( c )
{
@@ -37020,6 +37020,9 @@ int Abc_CommandAbc9Fadds( Abc_Frame_t * pAbc, int argc, char ** argv )
case 'f':
fUseFanout ^= 1;
break;
+ case 'x':
+ fUseXorTrick ^= 1;
+ break;
case 'b':
fIgnoreBoxDelays ^= 1;
break;
@@ -37045,7 +37048,7 @@ int Abc_CommandAbc9Fadds( Abc_Frame_t * pAbc, int argc, char ** argv )
Gia_ManTransferTiming( pTemp, pAbc->pGia );
}
if ( fUseArt )
- pTemp2 = Gia_ManDupWithArtificialBoxes( pTemp, DelayC, nPathMin, nPathMax, nPathLimit, fUseFanout, fIgnoreBoxDelays, fVerbose );
+ pTemp2 = Gia_ManDupWithArtificialBoxes( pTemp, DelayC, nPathMin, nPathMax, nPathLimit, fUseFanout, fUseXorTrick, fIgnoreBoxDelays, fVerbose );
else
{
pTemp2 = Gia_ManDup( pTemp );
@@ -37055,7 +37058,7 @@ int Abc_CommandAbc9Fadds( Abc_Frame_t * pAbc, int argc, char ** argv )
Abc_FrameUpdateGia( pAbc, pTemp2 );
return 0;
usage:
- Abc_Print( -2, "usage: &fadds [-NBSLP num] [-nafvh]\n" );
+ Abc_Print( -2, "usage: &fadds [-NBSLP num] [-nafxvh]\n" );
Abc_Print( -2, "\t detects full-adder chains and puts them into white boxes\n" );
Abc_Print( -2, "\t-n : toggles detecting natural full-adder chains [default = %s]\n", fUseNat? "yes": "no" );
Abc_Print( -2, "\t-N num : minimum length of a natural full-adder chain to detect [default = %d]\n", nFaddMin );
@@ -37065,6 +37068,7 @@ usage:
Abc_Print( -2, "\t-L num : maximum length of an artificial full-adder chain [default = %d]\n", nPathMax );
Abc_Print( -2, "\t-P num : maximum number of artificial full-adder chains to detect [default = %d]\n", nPathLimit );
Abc_Print( -2, "\t-f : toggles allowing external fanouts in artificial chains [default = %s]\n", fUseFanout? "yes": "no" );
+ Abc_Print( -2, "\t-x : toggles using XOR to generate fanouts in artificial chains [default = %s]\n", fUseXorTrick? "yes": "no" );
Abc_Print( -2, "\t-b : toggles ignoring boxes when computing delays [default = %s]\n", fIgnoreBoxDelays? "yes": "no" );
Abc_Print( -2, "\t-v : toggles printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
Abc_Print( -2, "\t-h : print the command usage\n");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 20:52:38 +0000