Extending Liberty parser to handle multi-output cells.

src/base/abc/abc.h

@@ -661,6 +661,8 @@ extern ABC_DLL int                Abc_LibFindTopLevelModels( Abc_Lib_t * pLib );
 extern ABC_DLL Abc_Ntk_t *        Abc_LibDeriveRoot( Abc_Lib_t * pLib );
 /*=== abcLog.c ==========================================================*/
 extern ABC_DLL void               Abc_NtkWriteLogFile( char * pFileName, Abc_Cex_t * pSeqCex, int Status, int nFrames, char * pCommand );
+/*=== abcMap.c ==========================================================*/
+extern ABC_DLL Abc_Obj_t *        Abc_NtkFetchTwinNode( Abc_Obj_t * pNode );
 /*=== abcMiter.c ==========================================================*/
 extern ABC_DLL int                Abc_NtkMinimumBase( Abc_Ntk_t * pNtk );
 extern ABC_DLL int                Abc_NodeMinimumBase( Abc_Obj_t * pNode );

src/base/abc/abcUtil.c

@@ -357,22 +357,22 @@ int Abc_NtkGetClauseNum( Abc_Ntk_t * pNtk )
 ***********************************************************************/
 double Abc_NtkGetMappedArea( Abc_Ntk_t * pNtk )
 {
-    Abc_Obj_t * pNode;
+    Abc_Obj_t * pObj;
     double TotalArea;
     int i;
     assert( Abc_NtkHasMapping(pNtk) );
     TotalArea = 0.0;
-    Abc_NtkForEachNode( pNtk, pNode, i )
+    Abc_NtkForEachNode( pNtk, pObj, i )
     {
-//        assert( pNode->pData );
-        if ( pNode->pData == NULL )
+//        assert( pObj->pData );
+        if ( pObj->pData == NULL )
         {
             printf( "Node without mapping is encountered.\n" );
             continue;
         }
-        TotalArea += Mio_GateReadArea( (Mio_Gate_t *)pNode->pData );
+        TotalArea += Mio_GateReadArea( (Mio_Gate_t *)pObj->pData );
         // assuming that twin gates follow each other
-        if ( Mio_GateReadTwin(((Mio_Gate_t *)pNode->pData)) != NULL )
+        if ( Abc_NtkFetchTwinNode(pObj) )
             i++;
     }
     return TotalArea;

src/base/abci/abcMap.c

@@ -682,6 +682,35 @@ Abc_Obj_t * Abc_NodeFromMapSuperChoice_rec( Abc_Ntk_t * pNtkNew, Map_Super_t * p
     return pNodeNew;
 }
 
+/**Function*************************************************************
+
+  Synopsis    [Returns the twin node if it exists.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Abc_Obj_t * Abc_NtkFetchTwinNode( Abc_Obj_t * pNode )
+{
+    Abc_Obj_t * pNode2;
+    Mio_Gate_t * pGate = (Mio_Gate_t *)pNode->pData;
+    assert( Abc_NtkHasMapping(pNode->pNtk) );
+    if ( pGate == NULL || Mio_GateReadTwin(pGate) == NULL )
+        return NULL;
+    // assuming the twin node is following next
+    if ( (int)Abc_ObjId(pNode) == Abc_NtkObjNumMax(pNode->pNtk) - 1 )
+        return NULL;
+    pNode2 = Abc_NtkObj( pNode->pNtk, Abc_ObjId(pNode) + 1 );
+    if ( pNode2 == NULL || !Abc_ObjIsNode(pNode2) || Abc_ObjFaninNum(pNode) != Abc_ObjFaninNum(pNode2) )
+        return NULL;
+    if ( Mio_GateReadTwin(pGate) != (Mio_Gate_t *)pNode2->pData )
+        return NULL;
+    return pNode2;
+}
+
 
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///

src/base/abci/abcPrint.c

@@ -1025,7 +1025,7 @@ void Abc_NtkPrintGates( Abc_Ntk_t * pNtk, int fUseLibrary )
             Mio_GateSetValue( (Mio_Gate_t *)pObj->pData, 1 + Mio_GateReadValue((Mio_Gate_t *)pObj->pData) );
             CounterTotal++;
             // assuming that twin gates follow each other
-            if ( Mio_GateReadTwin(((Mio_Gate_t *)pObj->pData)) != NULL )
+            if ( Abc_NtkFetchTwinNode(pObj) )
                 i++;
         }
 

src/base/io/ioWriteBlif.c

@@ -514,6 +514,7 @@ void Io_NtkWriteNodeFanins( FILE * pFile, Abc_Obj_t * pNode )
     fprintf( pFile, " %s", pName );
 }
 
+
 /**Function*************************************************************
 
   Synopsis    [Writes the primary input list.]
@@ -527,12 +528,11 @@ void Io_NtkWriteNodeFanins( FILE * pFile, Abc_Obj_t * pNode )
 ***********************************************************************/
 int Io_NtkWriteNodeGate( FILE * pFile, Abc_Obj_t * pNode, int Length )
 {
+    static int fReport = 0;
     Mio_Gate_t * pGate = (Mio_Gate_t *)pNode->pData;
-    Mio_Gate_t * pGate2;
     Mio_Pin_t * pGatePin;
     Abc_Obj_t * pNode2;
     int i;
-    // write the node
     fprintf( pFile, " %-*s ", Length, Mio_GateReadName(pGate) );
     for ( pGatePin = Mio_GateReadPins(pGate), i = 0; pGatePin; pGatePin = Mio_PinReadNext(pGatePin), i++ )
         fprintf( pFile, "%s=%s ", Mio_PinReadName(pGatePin), Abc_ObjName( Abc_ObjFanin(pNode,i) ) );
@@ -540,25 +540,14 @@ int Io_NtkWriteNodeGate( FILE * pFile, Abc_Obj_t * pNode, int Length )
     fprintf( pFile, "%s=%s", Mio_GateReadOutName(pGate), Abc_ObjName( Abc_ObjFanout0(pNode) ) );
     if ( Mio_GateReadTwin(pGate) == NULL )
         return 0;
-    // assuming the twin node is following next
-    if ( (int)Abc_ObjId(pNode) == Abc_NtkObjNumMax(pNode->pNtk) - 1 )
-    {
-        printf( "Warning: Missing second output of gate \"%s\".\n", Mio_GateReadName(pGate) );
-        return 0;
-    }
-    pNode2 = Abc_NtkObj( pNode->pNtk, Abc_ObjId(pNode) + 1 );
-    if ( !Abc_ObjIsNode(pNode2) || Abc_ObjFaninNum(pNode) != Abc_ObjFaninNum(pNode2) )
-    {
-        printf( "Warning: Missing second output of gate \"%s\".\n", Mio_GateReadName(pGate) );
-        return 0;
-    }
-    pGate2 = (Mio_Gate_t *)pNode2->pData;
-    if ( strcmp( Mio_GateReadName(pGate), Mio_GateReadName(pGate2)) )
+    pNode2 = Abc_NtkFetchTwinNode( pNode );
+    if ( pNode2 == NULL )
     {
-        printf( "Warning: Missing second output of gate \"%s\".\n", Mio_GateReadName(pGate) );
+        if ( !fReport )
+            fReport = 1, printf( "Warning: Missing second output of gate(s) \"%s\".\n", Mio_GateReadName(pGate) );
         return 0;
     }
-    fprintf( pFile, " %s=%s", Mio_GateReadOutName(pGate2), Abc_ObjName( Abc_ObjFanout0(pNode2) ) );
+    fprintf( pFile, " %s=%s", Mio_GateReadOutName((Mio_Gate_t *)pNode2->pData), Abc_ObjName( Abc_ObjFanout0(pNode2) ) );
     return 1;
 }
 

src/map/amap/amapInt.h

@@ -149,6 +149,7 @@ struct Amap_Pin_t_
 struct Amap_Gat_t_
 {
     Amap_Lib_t *       pLib;            // library   
+    Amap_Gat_t *       pTwin;           // twin gate
     char *             pName;           // the name of the gate
     char *             pOutName;        // name of the output
     double             dArea;           // the area of the gate

src/map/amap/amapLib.c

@@ -269,11 +269,11 @@ Vec_Ptr_t * Amap_LibSelectGates( Amap_Lib_t * p, int fVerbose )
     vSelect = Vec_PtrAlloc( 100 );
     Vec_PtrForEachEntry( Amap_Gat_t *, p->vSorted, pGate, i )
     {
-        if ( pGate->pFunc == NULL )
+        if ( pGate->pFunc == NULL || pGate->pTwin != NULL )
             continue;
         Vec_PtrForEachEntryStop( Amap_Gat_t *, p->vSorted, pGate2, k, i )
         {
-            if ( pGate2->pFunc == NULL )
+            if ( pGate2->pFunc == NULL || pGate2->pTwin != NULL )
                 continue;
             if ( pGate2->nPins != pGate->nPins )
                 continue;

src/map/amap/amapLiberty.c

@@ -229,7 +229,7 @@ Amap_Item_t * Amap_LibertyPinFunction( Amap_Tree_t * p, Amap_Item_t * pPin )
 
 /**Function*************************************************************
 
-  Synopsis    [Returns cell's function.]
+  Synopsis    [Returns output pin(s).]
 
   Description []
 
@@ -250,6 +250,20 @@ Amap_Item_t * Amap_LibertyCellOutput( Amap_Tree_t * p, Amap_Item_t * pCell )
     }
     return NULL;
 }
+Vec_Ptr_t * Amap_LibertyCellOutputs( Amap_Tree_t * p, Amap_Item_t * pCell )
+{
+    Amap_Item_t * pPin;
+    Vec_Ptr_t * vOutPins;
+    vOutPins = Vec_PtrAlloc( 2 );
+    Amap_ItemForEachChild( p, pCell, pPin )
+    {
+        if ( Amap_LibertyCompare(p, pPin->Key, "pin") )
+            continue;
+        if ( Amap_LibertyPinFunction(p, pPin) )
+            Vec_PtrPush( vOutPins, pPin );
+    }
+    return vOutPins;
+}
 
 /**Function*************************************************************
 
@@ -353,9 +367,10 @@ char * Amap_LibertyGetStringFormula( Amap_Tree_t * p, Amap_Pair_t Pair )
 int Amap_LibertyPrintGenlib( Amap_Tree_t * p, char * pFileName, int fVerbose )
 {
     FILE * pFile;
+    Vec_Ptr_t * vOutputs;
     Amap_Item_t * pCell, * pArea, * pFunc, * pPin, * pOutput;
     char * pForm;
-    int Counter;
+    int i, Counter;
     if ( pFileName == NULL )
         pFile = stdout;
     else
@@ -406,12 +421,14 @@ int Amap_LibertyPrintGenlib( Amap_Tree_t * p, char * pFileName, int fVerbose )
                 printf( "Amap_LibertyPrintGenlib() skipped cell \"%s\" without logic function.\n", Amap_LibertyGetString(p, pCell->Head) );
             continue;
         }
+/*
         if ( Counter > 1 )
         {
             if ( fVerbose )
                 printf( "Amap_LibertyPrintGenlib() skipped multi-output cell \"%s\".\n", Amap_LibertyGetString(p, pCell->Head) );
             continue;
         }
+*/
         pArea = Amap_LibertyCellArea( p, pCell );
         if ( pArea == NULL )
         {
@@ -419,25 +436,28 @@ int Amap_LibertyPrintGenlib( Amap_Tree_t * p, char * pFileName, int fVerbose )
                 printf( "Amap_LibertyPrintGenlib() skipped cell \"%s\" with unspecified area.\n", Amap_LibertyGetString(p, pCell->Head) );
             continue;
         }
-        pOutput = Amap_LibertyCellOutput( p, pCell );
-        pFunc   = Amap_LibertyPinFunction( p, pOutput );
-        pForm   = Amap_LibertyGetStringFormula( p, pFunc->Head );
-        if ( !strcmp(pForm, "0") || !strcmp(pForm, "1") )
+//        pOutput = Amap_LibertyCellOutput( p, pCell );
+        vOutputs = Amap_LibertyCellOutputs( p, pCell );
+        Vec_PtrForEachEntry( Amap_Item_t *, vOutputs, pOutput, i )
         {
-            if ( fVerbose )
-                printf( "Amap_LibertyPrintGenlib() skipped cell \"%s\" with constant formula \"%s\".\n", Amap_LibertyGetString(p, pCell->Head), pForm );
-            continue;
+            pFunc   = Amap_LibertyPinFunction( p, pOutput );
+            pForm   = Amap_LibertyGetStringFormula( p, pFunc->Head );
+            if ( !strcmp(pForm, "0") || !strcmp(pForm, "1") )
+            {
+                if ( fVerbose )
+                    printf( "Amap_LibertyPrintGenlib() skipped cell \"%s\" with constant formula \"%s\".\n", Amap_LibertyGetString(p, pCell->Head), pForm );
+                continue;
+            }
+            fprintf( pFile, "GATE  " );
+            fprintf( pFile, "%16s  ", Amap_LibertyGetString(p, pCell->Head) );
+            fprintf( pFile, "%f  ",   atof(Amap_LibertyGetString(p, pArea->Head)) );
+            fprintf( pFile, "%s=",    Amap_LibertyGetString(p, pOutput->Head) );
+            fprintf( pFile, "%s;\n",  Amap_LibertyGetStringFormula(p, pFunc->Head) );
+            Amap_ItemForEachChild( p, pCell, pPin )
+                if ( pPin != pOutput && !Amap_LibertyCompare(p, pPin->Key, "pin") )
+                    fprintf( pFile, "    PIN  %13s  UNKNOWN  1  999  1.00  0.00  1.00  0.00\n", Amap_LibertyGetString(p, pPin->Head) );
         }
-
-        fprintf( pFile, "GATE  " );
-        fprintf( pFile, "%16s  ", Amap_LibertyGetString(p, pCell->Head) );
-        fprintf( pFile, "%f  ",   atof(Amap_LibertyGetString(p, pArea->Head)) );
-        fprintf( pFile, "%s=",    Amap_LibertyGetString(p, pOutput->Head) );
-        fprintf( pFile, "%s;\n",  Amap_LibertyGetStringFormula(p, pFunc->Head) );
-
-        Amap_ItemForEachChild( p, pCell, pPin )
-            if ( pPin != pOutput && !Amap_LibertyCompare(p, pPin->Key, "pin") )
-                fprintf( pFile, "    PIN  %13s  UNKNOWN  1  999  1.00  0.00  1.00  0.00\n", Amap_LibertyGetString(p, pPin->Head) );
+        Vec_PtrFree( vOutputs );
     }
     if ( pFile != stdout )
         fclose( pFile );

src/map/amap/amapRead.c

@@ -326,10 +326,10 @@ int Amap_CollectFormulaTokens( Vec_Ptr_t * vTokens, char * pToken, int iPos )
 Amap_Lib_t * Amap_ParseTokens( Vec_Ptr_t * vTokens, int fVerbose )
 {
     Amap_Lib_t * p;
-    Amap_Gat_t * pGate;
+    Amap_Gat_t * pGate, * pPrev;
     Amap_Pin_t * pPin;
     char * pToken;
-    int nPins, iPos = 0;
+    int i, nPins, iPos = 0;
     p = Amap_LibAlloc();
     pToken = (char *)Vec_PtrEntry(vTokens, iPos++);
     do 
@@ -409,8 +409,21 @@ Amap_Lib_t * Amap_ParseTokens( Vec_Ptr_t * vTokens, int fVerbose )
             Vec_PtrPush( p->vGates, pGate );
         }
         pToken = (char *)Vec_PtrEntry(vTokens, iPos++);
+//printf( "Finished reading gate %s (%s)\n", pGate->pName, pGate->pOutName );
     }
     while ( strcmp( pToken, ".end" ) );
+
+    // check if there are gates with identical names
+    pPrev = NULL;
+    Amap_LibForEachGate( p, pGate, i )
+    {
+        if ( pPrev && !strcmp(pPrev->pName, pGate->pName) )
+        {
+            pPrev->pTwin = pGate, pGate->pTwin = pPrev;
+            printf( "Warning: Detected multi-output gate \"%s\".\n", pGate->pName );
+        }
+        pPrev = pGate;
+    }
     return p;
 }
 

src/map/mio/mioUtils.c

@@ -319,6 +319,8 @@ Mio_Gate_t ** Mio_CollectRoots( Mio_Library_t * pLib, int nInputs, float tDelay,
             continue;
         if ( pGate->uTruth == ~0xAAAAAAAAAAAAAAAA && fSkipInv )
             continue;
+        if ( pGate->pTwin ) // skip multi-output gates for now
+            continue;
         // check if the gate with this functionality already exists
         for ( i = 0; i < iGate; i++ )
             if ( ppGates[i]->uTruth == pGate->uTruth )