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Experiment with SOP balancing.

This commit is contained in:
Alan Mishchenko 2014-07-02 11:19:27 -07:00
parent 7ff2bce037
commit c6814a5c8b
1 changed files with 20 additions and 1 deletions
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21
src/aig/gia/giaIf.c
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@ -714,6 +714,18 @@ int Gia_ManBuildFromMini( Gia_Man_t * pNew, If_Man_t * pIfMan, If_Cut_t * pCut,
SeeAlso []
***********************************************************************/
int Gia_ManFromIfAig_rec( Gia_Man_t * pNew, If_Man_t * pIfMan, If_Obj_t * pIfObj )
{
int iLit0, iLit1;
if ( pIfObj->iCopy )
return pIfObj->iCopy;
iLit0 = Gia_ManFromIfAig_rec( pNew, pIfMan, pIfObj->pFanin0 );
iLit1 = Gia_ManFromIfAig_rec( pNew, pIfMan, pIfObj->pFanin1 );
iLit0 = Abc_LitNotCond( iLit0, pIfObj->fCompl0 );
iLit1 = Abc_LitNotCond( iLit1, pIfObj->fCompl1 );
pIfObj->iCopy = Gia_ManHashAnd( pNew, iLit0, iLit1 );
return pIfObj->iCopy;
}
Gia_Man_t * Gia_ManFromIfAig( If_Man_t * pIfMan )
{
int fHash = 0;
@ -731,7 +743,8 @@ Gia_Man_t * Gia_ManFromIfAig( If_Man_t * pIfMan )
// iterate through nodes used in the mapping
vAig = Vec_IntAlloc( 1 << 16 );
vLeaves = Vec_IntAlloc( 16 );
If_ManCleanCutData( pIfMan );
// If_ManForEachObj( pIfMan, pIfObj, i )
// pIfObj->iCopy = 0;
If_ManForEachObj( pIfMan, pIfObj, i )
{
if ( pIfObj->nRefs == 0 && !If_ObjIsTerm(pIfObj) )
@ -739,6 +752,12 @@ Gia_Man_t * Gia_ManFromIfAig( If_Man_t * pIfMan )
if ( If_ObjIsAnd(pIfObj) )
{
pCutBest = If_ObjCutBest( pIfObj );
// if the cut does not offer delay improvement
// if ( (int)pIfObj->Level <= (int)pCutBest->Delay )
// {
// Gia_ManFromIfAig_rec( pNew, pIfMan, pIfObj );
// continue;
// }
// collect leaves of the best cut
Vec_IntClear( vLeaves );
If_CutForEachLeaf( pIfMan, pCutBest, pIfLeaf, k )