4 files changed, 75 insertions, 2 deletions

diff --git a/src/aig/gia/gia.h b/src/aig/gia/gia.h
index 6dad5eb5..41093a30 100644
--- a/src/aig/gia/gia.h
+++ b/src/aig/gia/gia.h
@@ -874,6 +874,7 @@ extern Gia_Man_t *         Gia_ManChoiceMiter( Vec_Ptr_t * vGias );
 extern Gia_Man_t *         Gia_ManDupWithConstraints( Gia_Man_t * p, Vec_Int_t * vPoTypes );
 extern Gia_Man_t *         Gia_ManDupCones( Gia_Man_t * p, int * pPos, int nPos, int fTrimPis );
 extern Gia_Man_t *         Gia_ManDupOneHot( Gia_Man_t * p );
+extern Gia_Man_t *         Gia_ManDupLevelized( Gia_Man_t * p );
 /*=== giaEnable.c ==========================================================*/
 extern void                Gia_ManDetectSeqSignals( Gia_Man_t * p, int fSetReset, int fVerbose );
 extern Gia_Man_t *         Gia_ManUnrollAndCofactor( Gia_Man_t * p, int nFrames, int nFanMax, int fVerbose );
@@ -1071,8 +1072,10 @@ extern void                Gia_ManCleanTruth( Gia_Man_t * p );
 extern void                Gia_ManFillValue( Gia_Man_t * p );
 extern void                Gia_ObjSetPhase( Gia_Obj_t * pObj );
 extern void                Gia_ManSetPhase( Gia_Man_t * p );
+extern void                Gia_ManSetPhasePattern( Gia_Man_t * p, Vec_Int_t * vCiValues );
 extern void                Gia_ManSetPhase1( Gia_Man_t * p );
 extern void                Gia_ManCleanPhase( Gia_Man_t * p );
+extern int                 Gia_ManCheckCoPhase( Gia_Man_t * p );
 extern int                 Gia_ManLevelNum( Gia_Man_t * p );
 extern void                Gia_ManCreateValueRefs( Gia_Man_t * p );
 extern void                Gia_ManCreateRefs( Gia_Man_t * p );
diff --git a/src/aig/gia/giaAiger.c b/src/aig/gia/giaAiger.c
index 19ea1447..e30d88de 100644
--- a/src/aig/gia/giaAiger.c
+++ b/src/aig/gia/giaAiger.c
@@ -1044,6 +1044,7 @@ void Gia_AigerWrite( Gia_Man_t * pInit, char * pFileName, int fWriteSymbols, int
         p->vNamesOut  = pInit->vNamesOut;  pInit->vNamesOut  = NULL;
         p->pAigExtra  = pInit->pAigExtra;  pInit->pAigExtra  = NULL;
         p->nAnd2Delay = pInit->nAnd2Delay; pInit->nAnd2Delay = 0;
+        p->nConstrs   = pInit->nConstrs;   pInit->nConstrs   = 0;
     }
     else
         p = pInit;
@@ -1137,7 +1138,6 @@ void Gia_AigerWrite( Gia_Man_t * pInit, char * pFileName, int fWriteSymbols, int
         Vec_StrFree( vStrExt );
         if ( fVerbose ) printf( "Finished writing extension \"a\".\n" );
     }
-/*
     // write constraints
     if ( p->nConstrs )
     {
@@ -1145,7 +1145,6 @@ void Gia_AigerWrite( Gia_Man_t * pInit, char * pFileName, int fWriteSymbols, int
         Gia_FileWriteBufferSize( pFile, 4 );
         Gia_FileWriteBufferSize( pFile, p->nConstrs );
     }
-*/
     // write timing information
     if ( p->nAnd2Delay )
     {
diff --git a/src/aig/gia/giaDup.c b/src/aig/gia/giaDup.c
index 78aac33c..f3f60267 100644
--- a/src/aig/gia/giaDup.c
+++ b/src/aig/gia/giaDup.c
@@ -2243,6 +2243,47 @@ Gia_Man_t * Gia_ManDupOneHot( Gia_Man_t * p )
     return pNew;
 }
 
+/**Function*************************************************************
+
+  Synopsis    [Duplicates the AIG with nodes ordered by level.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManDupLevelized( Gia_Man_t * p )
+{
+    Gia_Man_t * pNew;
+    Gia_Obj_t * pObj;
+    int i, nLevels = Gia_ManLevelNum( p );
+    int * pCounts = ABC_CALLOC( int, nLevels + 1 );
+    int * pNodes = ABC_ALLOC( int, Gia_ManAndNum(p) );
+    Gia_ManForEachAnd( p, pObj, i )
+        pCounts[Gia_ObjLevel(p, pObj)]++;
+    for ( i = 1; i <= nLevels; i++ )
+        pCounts[i] += pCounts[i-1];
+    Gia_ManForEachAnd( p, pObj, i )
+        pNodes[pCounts[Gia_ObjLevel(p, pObj)-1]++] = i;
+    // duplicate
+    pNew = Gia_ManStart( Gia_ManObjNum(p) );
+    pNew->pName = Abc_UtilStrsav( p->pName );
+    pNew->pSpec = Abc_UtilStrsav( p->pSpec );
+    Gia_ManConst0(p)->Value = 0;
+    Gia_ManForEachCi( p, pObj, i )
+        pObj->Value = Gia_ManAppendCi( pNew );
+    for ( i = 0; i < Gia_ManAndNum(p) && (pObj = Gia_ManObj(p, pNodes[i])); i++ )
+        pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+    Gia_ManForEachCo( p, pObj, i )
+        pObj->Value = Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
+    Gia_ManSetRegNum( pNew, Gia_ManRegNum(p) );
+    ABC_FREE( pCounts );
+    ABC_FREE( pNodes );
+    return pNew;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////
diff --git a/src/aig/gia/giaUtil.c b/src/aig/gia/giaUtil.c
index 6f4389a8..1d122112 100644
--- a/src/aig/gia/giaUtil.c
+++ b/src/aig/gia/giaUtil.c
@@ -366,6 +366,16 @@ void Gia_ManSetPhase( Gia_Man_t * p )
     Gia_ManForEachObj( p, pObj, i )
         Gia_ObjSetPhase( pObj );
 }
+void Gia_ManSetPhasePattern( Gia_Man_t * p, Vec_Int_t * vCiValues )  
+{
+    Gia_Obj_t * pObj;
+    int i;
+    Gia_ManForEachObj( p, pObj, i )
+        if ( Gia_ObjIsCi(pObj) )
+            pObj->fPhase = Vec_IntEntry( vCiValues, Gia_ObjCioId(pObj) );
+        else
+            Gia_ObjSetPhase( pObj );
+}
 
 /**Function*************************************************************
 
@@ -410,6 +420,26 @@ void Gia_ManCleanPhase( Gia_Man_t * p )
 
 /**Function*************************************************************
 
+  Synopsis    [Returns the number of COs whose value is 1.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Gia_ManCheckCoPhase( Gia_Man_t * p )
+{
+    Gia_Obj_t * pObj;
+    int i, Counter = 0;
+    Gia_ManForEachCo( p, pObj, i )
+        Counter += pObj->fPhase;
+    return Counter;
+}
+
+/**Function*************************************************************
+
   Synopsis    [Prepares copies for the model.]
 
   Description []