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Experiments with MUX restructuring.

This commit is contained in:
Alan Mishchenko 2020-01-20 13:25:38 -08:00
parent 632c7a7d89
commit 0e05d1487f
1 changed files with 34 additions and 7 deletions
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41
src/aig/gia/giaUtil.c
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@ -2396,29 +2396,56 @@ void Gia_ManDumpFiles( Gia_Man_t * p, int nCexesT, int nCexesV )
Gia_Man_t * Gia_ManDupWithMuxPos( Gia_Man_t * p )
{
Vec_Int_t * vPoints = Vec_IntAlloc( 1000 );
Vec_Int_t * vQuads = Vec_IntAlloc( 1000 );
Vec_Bit_t * vHeads = Vec_BitStart( Gia_ManObjNum(p) );
Vec_Bit_t * vDatas = Vec_BitStart( Gia_ManObjNum(p) );
Gia_Obj_t * pObj, * pCtrl, * pData0, * pData1;
Gia_Man_t * pNew = Gia_ManDup( p ); int i, iObj;
assert( Gia_ManRegNum(pNew) == 0 );
Gia_ManForEachCo( pNew, pObj, i )
Gia_ObjFanin0(pObj)->fMark0 = 1;
Gia_ManForEachAnd( pNew, pObj, i )
{
if ( !Gia_ObjIsMuxType(pObj) )
continue;
pCtrl = Gia_ObjRecognizeMux( pObj, &pData1, &pData0 );
pCtrl = Gia_Regular(pCtrl);
pData1 = Gia_Regular(pData1);
pData0 = Gia_Regular(pData0);
if ( Gia_ObjIsAnd(pObj) && !pObj->fMark0 ) Vec_IntPush( vPoints, Gia_ObjId(pNew, pObj) );
if ( Gia_ObjIsAnd(pCtrl) && !pCtrl->fMark0 ) Vec_IntPush( vPoints, Gia_ObjId(pNew, pCtrl) );
if ( Gia_ObjIsAnd(pData1) && !pData1->fMark0 ) Vec_IntPush( vPoints, Gia_ObjId(pNew, pData1) );
if ( Gia_ObjIsAnd(pData0) && !pData0->fMark0 ) Vec_IntPush( vPoints, Gia_ObjId(pNew, pData0) );
pData1 = Gia_Regular(pData1);
Vec_IntPushTwo( vQuads, Gia_ObjId(pNew, pObj), Gia_ObjId(pNew, pCtrl) );
Vec_IntPushTwo( vQuads, Gia_ObjId(pNew, pData0), Gia_ObjId(pNew, pData1) );
Vec_BitWriteEntry( vHeads, Gia_ObjId(pNew, pObj), 1 );
Vec_BitWriteEntry( vDatas, Gia_ObjId(pNew, pData0), 1 );
Vec_BitWriteEntry( vDatas, Gia_ObjId(pNew, pData1), 1 );
}
Gia_ManForEachCo( pNew, pObj, i )
Gia_ObjFanin0(pObj)->fMark0 = 1;
for ( i = 0; i < Vec_IntSize(vQuads)/4; i++ )
{
int iObj = Vec_IntEntry( vQuads, 4*i+0 );
int iCtrl = Vec_IntEntry( vQuads, 4*i+1 );
int iData0 = Vec_IntEntry( vQuads, 4*i+2 );
int iData1 = Vec_IntEntry( vQuads, 4*i+3 );
if ( (Vec_BitEntry(vHeads, iObj) && Vec_BitEntry(vDatas, iObj)) ||
(Vec_BitEntry(vHeads, iData0) && Vec_BitEntry(vDatas, iData0)) ||
(Vec_BitEntry(vHeads, iData1) && Vec_BitEntry(vDatas, iData1)) )
{
Gia_Obj_t * pObj = Gia_ManObj( p, iObj );
Gia_Obj_t * pCtrl = Gia_ManObj( p, iCtrl );
Gia_Obj_t * pData0 = Gia_ManObj( p, iData0 );
Gia_Obj_t * pData1 = Gia_ManObj( p, iData1 );
if ( Gia_ObjIsAnd(pObj) && !pObj->fMark0 ) Vec_IntPush( vPoints, iObj );
if ( Gia_ObjIsAnd(pCtrl) && !pCtrl->fMark0 ) Vec_IntPush( vPoints, iCtrl );
if ( Gia_ObjIsAnd(pData0) && !pData0->fMark0 ) Vec_IntPush( vPoints, iData0 );
if ( Gia_ObjIsAnd(pData1) && !pData1->fMark0 ) Vec_IntPush( vPoints, iData1 );
}
}
Gia_ManCleanMark0( pNew );
Vec_IntUniqify( vPoints );
Vec_IntForEachEntry( vPoints, iObj, i )
Gia_ManAppendCo( pNew, Abc_Var2Lit(iObj, 0) );
Vec_IntFree( vPoints );
Vec_IntFree( vQuads );
Vec_BitFree( vHeads );
Vec_BitFree( vDatas );
return pNew;
}