luke
/
abc
mirror of https://github.com/YosysHQ/abc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Experiments with MFFC computation.

This commit is contained in:
Alan Mishchenko 2020-11-16 07:12:26 -08:00
parent ecafca53d8
commit d350b1a82f
1 changed files with 109 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

152
src/aig/gia/giaMf.c
View File

@ -1548,38 +1548,6 @@ void Mf_ManComputeCuts( Mf_Man_t * p )
SeeAlso []
***********************************************************************/
int Mf_CutRef2_rec( Mf_Man_t * p, int * pCut, Vec_Int_t * vTemp, int Limit )
{
int i, Count = Mf_CutArea(p, Mf_CutSize(pCut), Mf_CutFunc(pCut));
if ( Limit == 0 ) return Count;
for ( i = 1; i <= Mf_CutSize(pCut); i++ )
{
Vec_IntPush( vTemp, pCut[i] );
if ( !Mf_ObjMapRefInc(p, pCut[i]) && Mf_ManObj(p, pCut[i])->iCutSet )
Count += Mf_CutRef2_rec( p, Mf_ObjCutBest(p, pCut[i]), vTemp, Limit-1 );
}
return Count;
}
static inline int Mf_CutAreaDerefed2( Mf_Man_t * p, int * pCut )
{
int Ela1, iObj, i;
Vec_IntClear( &p->vTemp );
Ela1 = Mf_CutRef2_rec( p, pCut, &p->vTemp, 8 );
Vec_IntForEachEntry( &p->vTemp, iObj, i )
Mf_ObjMapRefDec( p, iObj );
return Ela1;
}
static inline int Mf_CutAreaDerefed2Multi( Mf_Man_t * p, int ** ppCuts, int nCuts )
{
int Ela1 = 0, iObj, i;
Vec_IntClear( &p->vTemp );
for ( i = 0; i < nCuts; i++ )
Ela1 += Mf_CutRef2_rec( p, ppCuts[i], &p->vTemp, ABC_INFINITY );
Vec_IntForEachEntry( &p->vTemp, iObj, i )
Mf_ObjMapRefDec( p, iObj );
return Ela1;
}
int Mf_CutRef_rec( Mf_Man_t * p, int * pCut )
{
int i, Count = Mf_CutArea(p, Mf_CutSize(pCut), Mf_CutFunc(pCut));
@ -1610,6 +1578,67 @@ static inline int Mf_CutAreaDerefed( Mf_Man_t * p, int * pCut )
assert( Ela1 == Ela2 );
return Ela1;
}
static inline int Mf_CutAreaMffc( Mf_Man_t * p, int iObj )
{
return Mf_ObjMapRefNum(p, iObj) ?
Mf_CutAreaRefed (p, Mf_ObjCutBest(p, iObj)) :
Mf_CutAreaDerefed(p, Mf_ObjCutBest(p, iObj));
}
int Mf_CutRef2_rec( Mf_Man_t * p, int * pCut, Vec_Int_t * vTemp, int Limit )
{
int i, Count = Mf_CutArea(p, Mf_CutSize(pCut), Mf_CutFunc(pCut));
if ( Limit == 0 ) return Count;
for ( i = 1; i <= Mf_CutSize(pCut); i++ )
{
Vec_IntPush( vTemp, pCut[i] );
if ( !Mf_ObjMapRefInc(p, pCut[i]) && Mf_ManObj(p, pCut[i])->iCutSet )
Count += Mf_CutRef2_rec( p, Mf_ObjCutBest(p, pCut[i]), vTemp, Limit-1 );
}
return Count;
}
int Mf_CutDeref2_rec( Mf_Man_t * p, int * pCut, Vec_Int_t * vTemp, int Limit )
{
int i, Count = Mf_CutArea(p, Mf_CutSize(pCut), Mf_CutFunc(pCut));
if ( Limit == 0 ) return Count;
for ( i = 1; i <= Mf_CutSize(pCut); i++ )
{
Vec_IntPush( vTemp, pCut[i] );
if ( !Mf_ObjMapRefDec(p, pCut[i]) && Mf_ManObj(p, pCut[i])->iCutSet )
Count += Mf_CutDeref2_rec( p, Mf_ObjCutBest(p, pCut[i]), vTemp, Limit-1 );
}
return Count;
}
static inline int Mf_CutAreaRefed2( Mf_Man_t * p, int * pCut )
{
int Ela1, iObj, i;
Vec_IntClear( &p->vTemp );
Ela1 = Mf_CutDeref2_rec( p, pCut, &p->vTemp, 8 );
Vec_IntForEachEntry( &p->vTemp, iObj, i )
Mf_ObjMapRefInc( p, iObj );
return Ela1;
}
static inline int Mf_CutAreaDerefed2( Mf_Man_t * p, int * pCut )
{
int Ela1, iObj, i;
Vec_IntClear( &p->vTemp );
Ela1 = Mf_CutRef2_rec( p, pCut, &p->vTemp, 8 );
Vec_IntForEachEntry( &p->vTemp, iObj, i )
Mf_ObjMapRefDec( p, iObj );
return Ela1;
}
static inline int Mf_CutAreaRefed2Multi( Mf_Man_t * p, int iObj, int ** ppCuts, int nCuts )
{
int Ela1 = 0, iTemp, i;
Vec_IntClear( &p->vTemp );
for ( i = 0; i < nCuts; i++ )
Ela1 += Mf_CutDeref2_rec( p, ppCuts[i], &p->vTemp, ABC_INFINITY );
assert( Mf_ObjMapRefNum(p, iObj) == 0 );
Vec_IntForEachEntry( &p->vTemp, iTemp, i )
Mf_ObjMapRefInc( p, iTemp );
return Ela1;
}
static inline float Mf_CutFlow( Mf_Man_t * p, int * pCut, int * pTime )
{
Mf_Obj_t * pObj;
@ -1657,6 +1686,41 @@ static inline void Mf_ObjComputeBestCut( Mf_Man_t * p, int iObj )
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Mf_ManMappingFromMapping( Mf_Man_t * p )
{
Gia_Man_t * pGia = p->pGia0;
Gia_Obj_t * pObj;
int i, iObj, Count = 0;
Vec_Int_t * vMapping = Vec_IntAlloc( 3 * Gia_ManObjNum(pGia) );
Vec_IntFill( vMapping, Gia_ManObjNum(pGia), 0 );
Gia_ManForEachAnd( pGia, pObj, iObj )
if ( Mf_ObjMapRefNum(p, iObj) )
{
int * pCut = Mf_ObjCutBest(p, iObj);
Vec_IntWriteEntry( vMapping, iObj, Vec_IntSize(vMapping) );
Vec_IntPush( vMapping, Mf_CutSize(pCut) );
for ( i = 1; i <= Mf_CutSize(pCut); i++ )
Vec_IntPush( vMapping, pCut[i] );
Vec_IntPush( vMapping, iObj );
Count++;
}
assert( pGia->vMapping == NULL );
pGia->vMapping = vMapping;
printf( "Mapping is %.2fx larger than AIG manager.\n", 1.0*Vec_IntSize(vMapping)/Gia_ManObjNum(pGia) );
return Count;
}
/**Function*************************************************************
Synopsis []
@ -1685,11 +1749,9 @@ void Mf_ManPrintFanoutProfile( Mf_Man_t * p, Vec_Int_t * vFanCounts )
int Mf_ManPrintMfccStats( Mf_Man_t * p, int iObj )
{
Gia_Man_t * pGia = p->pGia0;
int Area = Mf_ObjMapRefNum(p, iObj) > 0 ?
Mf_CutAreaRefed (p, Mf_ObjCutBest(p, iObj)) :
Mf_CutAreaDerefed(p, Mf_ObjCutBest(p, iObj));
int Area;
printf( "%5d : Level = %5d Refs = %5d Mffc = %5d\n",
iObj, Gia_ObjLevelId(pGia, iObj), Mf_ObjMapRefNum(p, iObj), Area );
iObj, Gia_ObjLevelId(pGia, iObj), Mf_ObjMapRefNum(p, iObj), (Area = Mf_CutAreaMffc(p, iObj)) );
return Area;
}
void Mf_ManOptimizationOne( Mf_Man_t * p, int iObj )
@ -1697,10 +1759,14 @@ void Mf_ManOptimizationOne( Mf_Man_t * p, int iObj )
Gia_Man_t * pGia = p->pGia0;
int * ppCuts[32], nCuts = 0;
int iFanout, i, nAreaSum = 0, nAreaBest = 0;
// skip pivots whose MFFC fanouts are not used in the mapping or pointed to by COs
// skip pivots whose MFFC fanouts are pointed to by COs
Gia_ObjForEachFanoutStaticId( pGia, iObj, iFanout, i )
if ( Mf_ObjMapRefNum(p, iFanout) == 0 || Gia_ObjIsCo(Gia_ManObj(pGia, iFanout)) )
if ( Gia_ObjIsCo(Gia_ManObj(pGia, iFanout)) )
return;
// the pivot is used in the mapping as well as all of its fanouts
assert( Mf_ObjMapRefNum(p, iObj) > 1 );
Gia_ObjForEachFanoutStaticId( pGia, iObj, iFanout, i )
assert( Mf_ObjMapRefNum(p, iFanout) > 0 );
// print this pivot and its fanouts
printf( "\nPivot node = %d\n", iObj );
printf( "Pivot " ), Mf_ManPrintMfccStats( p, iObj );
@ -1711,21 +1777,21 @@ void Mf_ManOptimizationOne( Mf_Man_t * p, int iObj )
Mf_ObjMapRefInc( p, iFanout );
Gia_ObjForEachFanoutStaticId( pGia, iObj, iFanout, i )
ppCuts[nCuts++] = Mf_ObjCutBest( p, iFanout );
nAreaBest = Mf_CutAreaDerefed2Multi( p, ppCuts, nCuts );
nAreaBest = Mf_CutAreaRefed2Multi( p, iObj, ppCuts, nCuts );
Gia_ObjForEachFanoutStaticId( pGia, iObj, iFanout, i )
Mf_ObjMapRefDec( p, iFanout );
printf( "Sum of MFFC size = %d\n", nAreaSum );
printf( "Shared MFFC size = %d\n", nAreaBest );
printf( "Sum of MFFC sizes = %d\n", nAreaSum );
printf( "Shared MFFC size = %d\n", nAreaBest );
}
void Mf_ManOptimization( Mf_Man_t * p )
{
int nOutMax = 3;
Gia_Man_t * pGia = p->pGia0;
int i, Count, nNodes = Gia_NodeMffcMapping( pGia );
int i, Count, nNodes = Mf_ManMappingFromMapping( p );
Gia_ManLevelNum( pGia );
Gia_ManStaticMappingFanoutStart( pGia );
Mf_ManPrintFanoutProfile( p, pGia->vFanoutNums );
printf( "\nIndividual logic cones:\n" );
printf( "\nIndividual logic cones for mapping with %d nodes:\n", nNodes );
Vec_IntForEachEntry( pGia->vFanoutNums, Count, i )
if ( Count >= 2 && Count <= nOutMax && Gia_ObjIsAnd(Gia_ManObj(pGia, i)) )
Mf_ManOptimizationOne( p, i );