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

Experiments with LUT structure mapping.

This commit is contained in:
Alan Mishchenko 2015-09-28 21:43:02 -07:00
parent ac6066dce1
commit b01b47e571
1 changed files with 43 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
src/aig/gia/giaOf.c
View File

@ -137,8 +137,8 @@ static inline void Of_ObjUpdateRequired( Of_Man_t * p,int i, int x )
static inline int Of_ObjRefInc( Of_Man_t * p, int i ) { return Of_ObjData(p, i)->nRefs++; }
static inline int Of_ObjRefDec( Of_Man_t * p, int i ) { return --Of_ObjData(p, i)->nRefs; }
static inline int * Of_ObjCutBestP( Of_Man_t * p, int * pCutSet, int iObj ) { return Of_ObjCutBest(p, iObj) ? Of_CutFromHandle(pCutSet, Of_ObjCutBest(p, iObj)) : NULL; }
static inline void Of_ObjSetCutBestP( Of_Man_t * p, int * pCutSet, int iObj, int * pCut ) { Of_ObjSetCutBest( p, iObj, Of_CutHandle(pCutSet, pCut) ); }
static inline int * Of_ObjCutBestP( Of_Man_t * p, int * pCutSet, int iObj ) { assert(iObj>0 && iObj<Gia_ManObjNum(p->pGia));return Of_ObjCutBest(p, iObj) ? Of_CutFromHandle(pCutSet, Of_ObjCutBest(p, iObj)) : NULL; }
static inline void Of_ObjSetCutBestP( Of_Man_t * p, int * pCutSet, int iObj, int * pCut ) { Of_ObjSetCutBest( p, iObj, Of_CutHandle(pCutSet, pCut) ); /*printf( "Setting obj %d with cut %d.\n", iObj, Of_CutHandle(pCutSet, pCut));*/ }
#define Of_SetForEachCut( pList, pCut, i ) for ( i = 0, pCut = pList + 1; i < pList[0]; i++, pCut += Of_CutSize(pCut) + OF_CUT_EXTRA )
#define Of_ObjForEachCut( pCuts, i, nCuts ) for ( i = 0, i < nCuts; i++ )
@ -419,6 +419,14 @@ static inline void Of_ManLiftCuts( Of_Man_t * p, int iObj )
pCut[k] = Abc_Var2Lit(pCut[k], 0);
}
}
static inline void Of_CutPrint( Of_Man_t * p, int * pCut )
{
int k, iVar;
printf( "Cut with %d inputs and function %3d : { ", Of_CutSize(pCut), Of_CutFunc(pCut) == OF_NO_FUNC ? 0 : Of_CutFunc(pCut) );
Of_CutForEachVar( pCut, iVar, k )
printf( "%d ", iVar );
printf( "}\n" );
}
/**Function*************************************************************
@ -966,26 +974,33 @@ static inline int Of_ManComputeForwardCut( Of_Man_t * p, int iObj, int * pCut )
static inline int Of_ManComputeForwardObj( Of_Man_t * p, int iObj )
{
int Delay1 = ABC_INFINITY;
int i, * pCut, * pList = Of_ObjCutSet(p, iObj);
int i, * pCut, * pCutMin = NULL, * pList = Of_ObjCutSet(p, iObj);
// compute cut arrivals
Of_SetForEachCut( pList, pCut, i )
Delay1 = Abc_MinInt( Delay1, Of_ManComputeForwardCut(p, iObj, pCut) );
{
int Delay1This = Of_ManComputeForwardCut(p, iObj, pCut);
if ( Delay1 > Delay1This )
{
Delay1 = Delay1This;
pCutMin = pCut;
}
}
// if mapping is present, set object arrival equal to cut arrival
pCut = Of_ObjCutBestP( p, pList, iObj );
if ( pCut ) Delay1 = Of_CutDelay1( pCut );
if ( Of_ObjRefNum(p, iObj) )
Delay1 = Of_CutDelay1( Of_ObjCutBestP(p, pList, iObj) );
else
Of_ObjSetCutBestP( p, pList, iObj, pCutMin );
Of_ObjSetDelay1( p, iObj, Delay1 );
return Delay1;
}
void Of_ManComputeForward( Of_Man_t * p )
{
int Time = 0;
Gia_Obj_t * pObj; int i;
Gia_ManForEachAnd( p->pGia, pObj, i )
if ( Gia_ObjIsBuf(pObj) )
Of_ObjSetDelay1( p, i, Of_ObjDelay1(p, Gia_ObjFaninId0(pObj, i)) );
else
Time = Abc_MaxInt( Time, Of_ManComputeForwardObj(p, i) );
// printf( "Best delay = %.2f\n", Of_Int2Flt(Time) );
Of_ManComputeForwardObj( p, i );
}
static inline int Of_ManComputeRequired( Of_Man_t * p )
{
@ -1012,17 +1027,19 @@ static inline int Of_ManComputeBackwardCut( Of_Man_t * p, int * pCut )
int Of_CutRef_rec( Of_Man_t * p, int * pCut )
{
int i, Var, Count = Of_CutArea(p, Of_CutSize(pCut));
//printf( "Refing " ); Of_CutPrint( p, pCut );
Of_CutForEachVar( pCut, Var, i )
if ( Of_ObjCutBest(p, Var) && !Of_ObjRefInc(p, Var) )
Count += Of_CutRef_rec( p, Of_ObjCutBestP(p, Of_ObjCutSet(p, i), Var) );
Count += Of_CutRef_rec( p, Of_ObjCutBestP(p, Of_ObjCutSet(p, Var), Var) );
return Count;
}
int Of_CutDeref_rec( Of_Man_t * p, int * pCut )
{
int i, Var, Count = Of_CutArea(p, Of_CutSize(pCut));
//printf( "Derefing " ); Of_CutPrint( p, pCut );
Of_CutForEachVar( pCut, Var, i )
if ( Of_ObjCutBest(p, Var) && !Of_ObjRefDec(p, Var) )
Count += Of_CutDeref_rec( p, Of_ObjCutBestP(p, Of_ObjCutSet(p, i), Var) );
Count += Of_CutDeref_rec( p, Of_ObjCutBestP(p, Of_ObjCutSet(p, Var), Var) );
return Count;
}
static inline int Of_CutAreaDerefed( Of_Man_t * p, int * pCut )
@ -1038,6 +1055,7 @@ void Of_ManComputeBackward( Of_Man_t * p )
int fFirst = (int)(p->Iter == 0);
int DelayLut1 = p->pPars->nDelayLut1;
int i, k, Id, iVar, * pList, * pCut, * pCutMin;
int AreaBef = 0, AreaAft = 0;
// int Count0, Count1;
Of_ManComputeRequired( p );
// start references
@ -1061,7 +1079,7 @@ void Of_ManComputeBackward( Of_Man_t * p )
continue;
// deref best cut
if ( !fFirst )
Of_CutDeref_rec( p, Of_ObjCutBestP(p, Of_ObjCutSet(p, i), i) );
AreaBef = Of_CutDeref_rec( p, Of_ObjCutBestP(p, Of_ObjCutSet(p, i), i) );
// select the best cut
// Count0 = Count1 = 0;
pCutMin = NULL;
@ -1085,14 +1103,21 @@ void Of_ManComputeBackward( Of_Man_t * p )
}
// printf( "%5d : %5d %5d %5d\n", i, Count0, Count1, Required );
// the cut is selected
assert( pCutMin != NULL );
Of_ObjSetCutBestP( p, pList, i, pCutMin );
Of_CutForEachVar( pCutMin, iVar, k )
{
Of_ObjUpdateRequired( p, iVar, Required - DelayLut1 );
Of_ObjRefInc( p, iVar );
if ( fFirst )
Of_ObjRefInc( p, iVar );
}
p->pPars->Area++;
// ref best cut
if ( !fFirst )
AreaAft = Of_CutRef_rec( p, pCutMin );
assert( AreaAft <= AreaBef );
// update parameters
p->pPars->Edge += Of_CutSize(pCutMin);
p->pPars->Area++;
}
}
@ -1113,7 +1138,7 @@ void Of_ManSetDefaultPars( Jf_Par_t * pPars )
pPars->nLutSize = 4;
pPars->nCutNum = 16;
pPars->nProcNum = 0;
pPars->nRounds = 1;
pPars->nRounds = 4;
pPars->nRoundsEla = 0;
pPars->nRelaxRatio = 0;
pPars->nCoarseLimit = 3;
@ -1149,12 +1174,13 @@ Gia_Man_t * Of_ManDeriveMapping( Of_Man_t * p )
pCut = Of_ObjCutBestP( p, Of_ObjCutSet(p, i), i );
Vec_IntWriteEntry( vMapping, i, Vec_IntSize(vMapping) );
Vec_IntPush( vMapping, Of_CutSize(pCut) );
// printf( "%3d : ", i );
Of_CutForEachVar( pCut, iVar, k )
{
Vec_IntPush( vMapping, iVar );
// printf( "%d ", iVar );
// printf( "%3d ", iVar );
}
// printf( " -- %d\n", i );
// printf( "\n" );
Vec_IntPush( vMapping, i );
}
assert( Vec_IntCap(vMapping) == 16 || Vec_IntSize(vMapping) == Vec_IntCap(vMapping) );