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Experiments with cofactoring variables.

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This commit is contained in:
Alan Mishchenko
2014-06-20 20:10:14 -07:00
parent 1e76ebdf3b
commit e2411552eb
3 changed files with 127 additions and 15 deletions
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src/proof/cec/cecSplit.c
+76 -6
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@@ -228,11 +228,11 @@ int Gia_SplitCofVar( Gia_Man_t * p, int LookAhead, int * pnFanouts, int * pnCost
LookAhead = Abc_MinInt( LookAhead, Gia_ManPiNum(p) );
for ( i = 0; i < LookAhead; i++ )
{
pPart = Gia_ManDupCofactor( p, pOrder[i], 0 );
pPart = Gia_ManDupCofactorVar( p, pOrder[i], 0 );
Cost0 = Gia_ManAndNum(pPart);
Gia_ManStop( pPart );
pPart = Gia_ManDupCofactor( p, pOrder[i], 1 );
pPart = Gia_ManDupCofactorVar( p, pOrder[i], 1 );
Cost1 = Gia_ManAndNum(pPart);
Gia_ManStop( pPart );
@@ -434,7 +434,7 @@ int Cec_GiaSplitTest2( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, in
int Depth = 1 + (pLast->vCofVars ? Vec_IntSize(pLast->vCofVars) : 0);
int nFanouts, Cost, iVar = Gia_SplitCofVar( pLast, LookAhead, &nFanouts, &Cost );
// cofactor
Gia_Man_t * pPart = Gia_ManDupCofactor( pLast, iVar, 0 );
Gia_Man_t * pPart = Gia_ManDupCofactorVar( pLast, iVar, 0 );
if ( pLast->vCofVars == NULL )
pLast->vCofVars = Vec_IntAlloc( 100 );
// print results
@@ -470,7 +470,7 @@ int Cec_GiaSplitTest2( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, in
else // UNDEC
Vec_PtrPush( vStack, pPart );
// cofactor
pPart = Gia_ManDupCofactor( pLast, iVar, 1 );
pPart = Gia_ManDupCofactorVar( pLast, iVar, 1 );
// create variable
pPart->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 );
Vec_IntAppend( pPart->vCofVars, pLast->vCofVars );
@@ -644,7 +644,7 @@ int Cec_GiaSplitTestInt( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax,
// determine cofactoring variable
int nFanouts, Cost, iVar = Gia_SplitCofVar( pLast, LookAhead, &nFanouts, &Cost );
// cofactor
Gia_Man_t * pPart = Gia_ManDupCofactor( pLast, iVar, 0 );
Gia_Man_t * pPart = Gia_ManDupCofactorVar( pLast, iVar, 0 );
pPart->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 );
Vec_IntAppend( pPart->vCofVars, pLast->vCofVars );
Vec_IntPush( pPart->vCofVars, Abc_Var2Lit(iVar, 1) );
@@ -658,7 +658,7 @@ int Cec_GiaSplitTestInt( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax,
// Cec_GiaSplitPrintRefs( pPart );
}
// cofactor
pPart = Gia_ManDupCofactor( pLast, iVar, 1 );
pPart = Gia_ManDupCofactorVar( pLast, iVar, 1 );
pPart->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 );
Vec_IntAppend( pPart->vCofVars, pLast->vCofVars );
Vec_IntPush( pPart->vCofVars, Abc_Var2Lit(iVar, 1) );
@@ -752,6 +752,76 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int
return RetValue;
}
/**Function*************************************************************
Synopsis [Print stats about cofactoring variables.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cec_GiaPrintCofStats( Gia_Man_t * p )
{
Gia_Man_t * pCof0, * pCof1;
Gia_Obj_t * pObj, * pFan0, * pFan1, * pCtrl;
Vec_Int_t * vMarks;
int i, Count = 0;
vMarks = Vec_IntStart( Gia_ManObjNum(p) );
Gia_ManForEachAnd( p, pObj, i )
{
if ( !Gia_ObjIsMuxType(pObj) )
continue;
if ( Gia_ObjRecognizeExor(pObj, &pFan0, &pFan1) )
continue;
pCtrl = Gia_ObjRecognizeMux( pObj, &pFan1, &pFan0 );
pCtrl = Gia_Regular(pCtrl);
Vec_IntAddToEntry( vMarks, Gia_ObjId(p, pCtrl), 1 );
}
printf( "The AIG with %d candidate nodes (PI+AND) has %d unique MUX control drivers:\n",
Gia_ManCandNum(p), Vec_IntCountPositive(vMarks) );
Gia_ManLevelNum( p );
Gia_ManForEachCand( p, pObj, i )
{
if ( !Vec_IntEntry(vMarks, i) )
continue;
pCof0 = Gia_ManDupCofactorObj( p, i, 0 );
pCof1 = Gia_ManDupCofactorObj( p, i, 1 );
printf( "%6d : ", Count++ );
printf( "Obj = %6d ", i );
printf( "MUX refs = %5d ", Vec_IntEntry(vMarks, i) );
printf( "Level = %5d ", Gia_ObjLevelId(p, i) );
printf( "Cof0 = %7d ", Gia_ManAndNum(pCof0) );
printf( "Cof1 = %7d ", Gia_ManAndNum(pCof1) );
printf( "\n" );
Gia_ManStop( pCof0 );
Gia_ManStop( pCof1 );
}
Vec_IntFree( vMarks );
}
void Cec_GiaPrintCofStats2( Gia_Man_t * p )
{
Gia_Man_t * pCof0, * pCof1;
Gia_Obj_t * pObj;
int i;
Gia_ManLevelNum( p );
Gia_ManCreateRefs( p );
Gia_ManForEachPi( p, pObj, i )
{
pCof0 = Gia_ManDupCofactorVar( p, i, 0 );
pCof1 = Gia_ManDupCofactorVar( p, i, 1 );
printf( "PI %5d : ", i );
printf( "Refs = %5d ", Gia_ObjRefNum(p, pObj) );
printf( "Cof0 = %7d ", Gia_ManAndNum(pCof0) );
printf( "Cof1 = %7d ", Gia_ManAndNum(pCof1) );
printf( "\n" );
Gia_ManStop( pCof0 );
Gia_ManStop( pCof1 );
}
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////