Experiments with don't-cares.

src/base/abc/abc.h

@@ -897,6 +897,7 @@ extern ABC_DLL char *             Abc_SopCreateInv( Mem_Flex_t * pMan );
 extern ABC_DLL char *             Abc_SopCreateBuf( Mem_Flex_t * pMan );
 extern ABC_DLL char *             Abc_SopCreateFromTruth( Mem_Flex_t * pMan, int nVars, unsigned * pTruth );
 extern ABC_DLL char *             Abc_SopCreateFromIsop( Mem_Flex_t * pMan, int nVars, Vec_Int_t * vCover );
+extern ABC_DLL char *             Abc_SopCreateFromTruthIsop( Mem_Flex_t * pMan, int nVars, word * pTruth, Vec_Int_t * vCover );
 extern ABC_DLL int                Abc_SopGetCubeNum( char * pSop );
 extern ABC_DLL int                Abc_SopGetLitNum( char * pSop );
 extern ABC_DLL int                Abc_SopGetVarNum( char * pSop );

src/base/abc/abcSop.c

@@ -19,6 +19,7 @@
 ***********************************************************************/
 
 #include "abc.h"
+#include "bool/kit/kit.h"
 
 ABC_NAMESPACE_IMPL_START
 
@@ -442,6 +443,37 @@ char * Abc_SopCreateFromIsop( Mem_Flex_t * pMan, int nVars, Vec_Int_t * vCover )
     return pSop;
 }
 
+/**Function*************************************************************
+
+  Synopsis    [Creates the cover from the ISOP computed from TT.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+char * Abc_SopCreateFromTruthIsop( Mem_Flex_t * pMan, int nVars, word * pTruth, Vec_Int_t * vCover )
+{
+    char * pSop = NULL;
+    assert( nVars <= 6 );
+    if ( pTruth[0] == 0 )
+        pSop = Abc_SopRegister( pMan, " 0\n" );
+    else if ( ~pTruth[0] == 0 )
+        pSop = Abc_SopRegister( pMan, " 1\n" );
+    else
+    {
+        int RetValue = Kit_TruthIsop( (unsigned *)pTruth, nVars, vCover, 1 );
+        assert( nVars > 0 );
+        assert( RetValue == 0 || RetValue == 1 );
+        pSop = Abc_SopCreateFromIsop( pMan, nVars, vCover );
+        if ( RetValue )
+            Abc_SopComplement( pSop );
+    }
+    return pSop;
+}
+
 /**Function*************************************************************
 
   Synopsis    [Creates the cover from the ISOP computed from TT.]

src/base/abci/abc.c

@@ -5672,7 +5672,7 @@ usage:
 int Abc_CommandMfse( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
     extern Abc_Ntk_t * Abc_NtkOptMfse( Abc_Ntk_t * pNtk, Acb_Par_t * pPars );
-    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
+    Abc_Ntk_t * pNtkNew, * pNtk = Abc_FrameReadNtk(pAbc);
     Acb_Par_t Pars, * pPars = &Pars; int c;
     Acb_ParSetDefault( pPars );
     Extra_UtilGetoptReset();
@@ -5771,6 +5771,19 @@ int Abc_CommandMfse( Abc_Frame_t * pAbc, int argc, char ** argv )
         Abc_Print( -1, "This command can only be applied to a logic network.\n" );
         return 1;
     }
+    pPars->nLutSize = Abc_NtkGetFaninMax( pNtk );
+    if ( pPars->nLutSize > 6 )
+    {
+        Abc_Print( -1, "Command is only applicable to LUT size no more than 6.\n" );
+        return 1;
+    }
+    pNtkNew = Abc_NtkOptMfse( pNtk, pPars );
+    if ( pNtkNew == NULL )
+    {
+        Abc_Print( -1, "Command \"mfse\" has failed.\n" );
+        return 1;
+    }
+    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
     return 0;
 
 usage:

src/base/abci/abcMfs.c

@@ -216,21 +216,8 @@ void Abc_NtkInsertMfs( Abc_Ntk_t * pNtk, Sfm_Ntk_t * p )
         vArray = Sfm_NodeReadFanins( p, pNode->iTemp );
         Vec_IntForEachEntry( vArray, Fanin, k )
             Abc_ObjAddFanin( pNode, Abc_NtkObj(pNtk, Vec_IntEntry(vMap, Fanin)) );
-        // update function
         pTruth = Sfm_NodeReadTruth( p, pNode->iTemp );
-        if ( pTruth[0] == 0 )
+        pNode->pData = Abc_SopCreateFromTruthIsop( (Mem_Flex_t *)pNtk->pManFunc, Vec_IntSize(vArray), pTruth, vCover );
-            pNode->pData = Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, " 0\n" );
-        else if ( ~pTruth[0] == 0 )
-            pNode->pData = Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, " 1\n" );
-        else
-        {
-            int RetValue = Kit_TruthIsop( (unsigned *)pTruth, Vec_IntSize(vArray), vCover, 1 );
-            assert( Vec_IntSize(vArray) > 0 );
-            assert( RetValue == 0 || RetValue == 1 );
-            pNode->pData = Abc_SopCreateFromIsop( (Mem_Flex_t *)pNtk->pManFunc, Vec_IntSize(vArray), vCover );
-            if ( RetValue )
-                Abc_SopComplement( (char *)pNode->pData );
-        }
         assert( Abc_SopGetVarNum((char *)pNode->pData) == Vec_IntSize(vArray) );
     }
     Vec_IntFree( vCover );

src/base/acb/acbAbc.c

@@ -86,15 +86,23 @@ Abc_Ntk_t * Acb_NtkToAbc( Abc_Ntk_t * pNtk, Acb_Ntk_t * p )
     int i, k, iObj, iFanin;
     Abc_Ntk_t * pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_SOP );
     Mem_Flex_t * pMan = (Mem_Flex_t *)pNtkNew->pManFunc;
+    Vec_Int_t * vCover = Vec_IntAlloc( 1000 );
     Acb_NtkCleanObjCopies( p );
     Acb_NtkForEachCi( p, iObj, i )
         Acb_ObjSetCopy( p, iObj, Abc_ObjId(Abc_NtkCi(pNtkNew, i)) );
     Acb_NtkForEachNode( p, iObj )
     {
         Abc_Obj_t * pObjNew = Abc_NtkCreateNode( pNtkNew );
+        pObjNew->pData = Abc_SopCreateFromTruthIsop( pMan, Acb_ObjFaninNum(p, iObj), Acb_ObjTruthP(p, iObj), vCover );
+        Acb_ObjSetCopy( p, iObj, Abc_ObjId(pObjNew) );
+    }
+    Vec_IntFree( vCover );
+    Acb_NtkForEachNode( p, iObj )
+    {
+        Abc_Obj_t * pObjNew = Abc_NtkObj(pNtkNew, Acb_ObjCopy(p, iObj));
         Acb_ObjForEachFanin( p, iObj, iFanin, k )
             Abc_ObjAddFanin( pObjNew, Abc_NtkObj(pNtkNew, Acb_ObjCopy(p, iFanin)) );
-        pObjNew->pData = Abc_SopCreateFromTruth( pMan, Acb_ObjFaninNum(p, iObj), (unsigned *)Acb_ObjTruthP(p, iObj) );
+        assert( Abc_SopGetVarNum((char *)pObjNew->pData) == Abc_ObjFaninNum(pObjNew) );
     }
     Acb_NtkForEachCoDriver( p, iFanin, i )
         Abc_ObjAddFanin( Abc_NtkCo(pNtkNew, i), Abc_NtkObj(pNtkNew, Acb_ObjCopy(p, iFanin)) );
@@ -222,7 +230,7 @@ Abc_Ntk_t * Abc_NtkOptMfse( Abc_Ntk_t * pNtk, Acb_Par_t * pPars )
     extern void Acb_NtkOpt( Acb_Ntk_t * p, Acb_Par_t * pPars );
     Abc_Ntk_t * pNtkNew;
     Acb_Ntk_t * p = Acb_NtkFromAbc( pNtk );
-    Acb_NtkOpt( p, pPars );
+    //Acb_NtkOpt( p, pPars );
     pNtkNew = Acb_NtkToAbc( pNtk, p );
     Acb_ManFree( p->pDesign );
     return pNtkNew;

src/base/acb/acbMfs.c

@@ -95,7 +95,7 @@ Vec_Wec_t * Acb_DeriveCnfForWindow( Acb_Ntk_t * p, Vec_Int_t * vWin, int PivotVa
         if ( Abc_LitIsCompl(iObj) && i < PivotVar )
             continue;
         vCnfBase = (Vec_Str_t *)Vec_WecEntry( vCnfs, iObj );
-        if ( vCnfBase != NULL )
+        if ( Vec_StrSize(vCnfBase) > 0 )
             continue;
         if ( vCnf == NULL )
             vCnf = Vec_StrAlloc( 1000 );

src/base/acb/acbUtil.c

@@ -362,6 +362,7 @@ void Acb_NtkUpdateNode( Acb_Ntk_t * p, int Pivot, word uTruth, Vec_Int_t * vSupp
         Acb_ObjAddFanin( p, Pivot, iFanin );
     Acb_ObjAddFanout( p, Pivot );
     Acb_NtkUpdateTiming( p, Pivot );
+    Vec_IntErase( Vec_WecEntry(&p->vCnfs, Pivot) );
 }