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Adding a new feature to decompose special 6-input cuts.

This commit is contained in:
Alan Mishchenko 2019-10-26 18:54:10 +03:00
parent feb3e7943d
commit f9309ce949
1 changed files with 28 additions and 0 deletions
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28
src/aig/gia/giaIf.c
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@ -1091,6 +1091,34 @@ int Gia_ManFromIfLogicNode( void * pIfMan, Gia_Man_t * pNew, int iObj, Vec_Int_t
}
return Gia_ManFromIfLogicCreateLutSpecial( pNew, pRes, vLeaves, vLeavesTemp, vCover, vMapping, vMapping2, vPacking );
}
if ( ((If_Man_t *)pIfMan)->pPars->fLut6Filter && Vec_IntSize(vLeaves) == 6 )
{
extern word If_Dec6Perform( word t, int fDerive );
extern void If_Dec6Verify( word t, word z );
Vec_Int_t * vLeaves2 = Vec_IntAlloc( 4 );
word t = pRes[0];
word z = If_Dec6Perform( t, 1 );
//If_DecPrintConfig( z );
If_Dec6Verify( t, z );
t = Abc_Tt6Stretch( z & 0xffff, 4 );
Vec_IntClear( vLeaves2 );
for ( i = 0; i < 4; i++ )
Vec_IntPush( vLeaves2, Vec_IntEntry( vLeaves, (int)((z >> (16+i*4)) & 7) ) );
iObjLit1 = Gia_ManFromIfLogicCreateLut( pNew, &t, vLeaves2, vCover, vMapping, vMapping2 );
t = Abc_Tt6Stretch( (z >> 32) & 0xffff, 4 );
Vec_IntClear( vLeaves2 );
for ( i = 0; i < 4; i++ )
if ( ((z >> (48+i*4)) & 7) == 7 )
Vec_IntPush( vLeaves2, iObjLit1 );
else
Vec_IntPush( vLeaves2, Vec_IntEntry( vLeaves, (int)((z >> (48+i*4)) & 7) ) );
iObjLit1 = Gia_ManFromIfLogicCreateLut( pNew, &t, vLeaves2, vCover, vMapping, vMapping2 );
Vec_IntFree( vLeaves2 );
return iObjLit1;
}
// check if there is no LUT structures
if ( pStr == NULL )
return Gia_ManFromIfLogicCreateLut( pNew, pRes, vLeaves, vCover, vMapping, vMapping2 );