Tuning LUT mapping to work while saving the best network.

src/base/abci/abc.c

@@ -15017,8 +15017,8 @@ int Abc_CommandIf( Abc_Frame_t * pAbc, int argc, char ** argv )
     // enable truth table computation if choices are selected
     if ( (c = Abc_NtkGetChoiceNum( pNtk )) )
     {
-        if ( !Abc_FrameReadFlag("silentmode") )
-            Abc_Print( 0, "Performing LUT mapping with %d choices.\n", c );
+//        if ( !Abc_FrameReadFlag("silentmode") )
+//            Abc_Print( 0, "Performing LUT mapping with %d choices.\n", c );
         pPars->fExpRed = 0;
     }
 
@@ -29749,8 +29749,8 @@ int Abc_CommandAbc9If( Abc_Frame_t * pAbc, int argc, char ** argv )
     // enable truth table computation if choices are selected
     if ( Gia_ManHasChoices(pAbc->pGia) )
     {
-        if ( !Abc_FrameReadFlag("silentmode") )
-            Abc_Print( 0, "Performing LUT mapping with choices.\n" );
+//        if ( !Abc_FrameReadFlag("silentmode") )
+//            Abc_Print( 0, "Performing LUT mapping with choices.\n" );
         pPars->fExpRed = 0;
     }
 

src/base/abci/abcPrint.c

@@ -101,7 +101,10 @@ int Abc_NtkCompareAndSaveBest( Abc_Ntk_t * pNtk )
         ParsBest.nPis  = ParsNew.nPis;
         ParsBest.nPos  = ParsNew.nPos;
         // writ the network
+        if ( strcmp(pNtk->pSpec + strlen(pNtk->pSpec) - strlen("_best.blif"), "_best.blif") )
             pFileNameOut = Extra_FileNameGenericAppend( pNtk->pSpec, "_best.blif" );
+        else
+            pFileNameOut = pNtk->pSpec;
         Io_Write( pNtk, pFileNameOut, IO_FILE_BLIF );
         return 1;
     }

src/map/if/if.h

@@ -490,7 +490,7 @@ extern int             If_ManPerformMapping( If_Man_t * p );
 extern int             If_ManPerformMappingComb( If_Man_t * p );
 /*=== ifCut.c ============================================================*/
 extern int             If_CutVerifyCuts( If_Set_t * pCutSet, int fOrdered );
-extern int             If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut );
+extern int             If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut, int fSaveCut0 );
 extern void            If_CutSort( If_Man_t * p, If_Set_t * pCutSet, If_Cut_t * pCut );
 extern void            If_CutOrder( If_Cut_t * pCut );
 extern int             If_CutMergeOrdered( If_Man_t * p, If_Cut_t * pCut0, If_Cut_t * pCut1, If_Cut_t * pCut );

src/map/if/ifCut.c

@@ -143,7 +143,7 @@ static inline int If_CutCheckDominance( If_Cut_t * pDom, If_Cut_t * pCut )
   SeeAlso     []
 
 ***********************************************************************/
-int If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut )
+int If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut, int fSaveCut0 )
 { 
     If_Cut_t * pTemp;
     int i, k;
@@ -154,7 +154,7 @@ int If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut )
         if ( pTemp->nLeaves > pCut->nLeaves )
         {
             // do not fiter the first cut
-            if ( i == 0 && pCutSet->nCuts > 1 && pCutSet->ppCuts[1]->fUseless )
+            if ( i == 0 && ((pCutSet->nCuts > 1 && pCutSet->ppCuts[1]->fUseless) || (fSaveCut0 && pCutSet->nCuts == 1)) )
                 continue;
             // skip the non-contained cuts
             if ( (pTemp->uSign & pCut->uSign) != pCut->uSign )

src/map/if/ifMap.c

@@ -184,7 +184,7 @@ void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPrep
         p->nCutsMerged++;
         p->nCutsTotal++;
         // check if this cut is contained in any of the available cuts
-        if ( !p->pPars->fSkipCutFilter && If_CutFilter( pCutSet, pCut ) )
+        if ( !p->pPars->fSkipCutFilter && If_CutFilter( pCutSet, pCut, p->pPars->fUserRecLib || p->pPars->fDelayOpt ) )
             continue;
         // compute the truth table
         pCut->iCutFunc = -1;
@@ -202,7 +202,7 @@ void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPrep
                 fChange = If_CutComputeTruth( p, pCut, pCut0, pCut1, pObj->fCompl0, pObj->fCompl1 );
             if ( p->pPars->fVerbose )
                 p->timeCache[4] += Abc_Clock() - clk;
-            if ( !p->pPars->fSkipCutFilter && fChange && If_CutFilter( pCutSet, pCut ) )
+            if ( !p->pPars->fSkipCutFilter && fChange && If_CutFilter( pCutSet, pCut, p->pPars->fUserRecLib || p->pPars->fDelayOpt ) )
                 continue;
             if ( p->pPars->fUseDsd )
             {
@@ -385,7 +385,7 @@ void If_ObjPerformMappingChoice( If_Man_t * p, If_Obj_t * pObj, int Mode, int fP
             // copy the cut into storage
             If_CutCopy( p, pCut, pCutTemp );
             // check if this cut is contained in any of the available cuts
-            if ( If_CutFilter( pCutSet, pCut ) )
+            if ( If_CutFilter( pCutSet, pCut, p->pPars->fUserRecLib || p->pPars->fDelayOpt ) )
                 continue;
             // check if the cut satisfies the required times
             assert( pCut->Delay == If_CutDelay( p, pTemp, pCut ) );

src/map/if/ifTime.c

@@ -378,12 +378,17 @@ int If_CutDelaySopCost( If_Man_t * p, If_Cut_t * pCut )
     }
     // get the cost
     If_AndClear( &Leaf );
-    if ( Vec_WrdSize(vAnds) )
+    if ( Vec_WrdSize(vAnds) > 0 )
         Leaf = If_WrdToAnd( Vec_WrdEntryLast(vAnds) );
-    if ( pCut->nLeaves > 2 && Vec_WrdSize(vAnds) > (int)pCut->nLeaves )
-        pCut->Cost = Vec_WrdSize(vAnds) - pCut->nLeaves;
     else
+        Leaf.Delay = 0;
+    if ( Vec_WrdSize(vAnds) > (int)pCut->nLeaves )
+        pCut->Cost = Vec_WrdSize(vAnds) - pCut->nLeaves;
+    else if ( pCut->nLeaves == 1 )
         pCut->Cost = 1;
+    else if ( pCut->nLeaves == 0 )
+        pCut->Cost = 0;
+    else assert( 0 );
     // get the permutation
     for ( i = 0; i < (int)pCut->nLeaves; i++ )
     {