Skip cells in Liberty files which have dont_use attribute.

src/map/amap/amapLiberty.c

@@ -209,6 +209,26 @@ int Amap_LibertyCellIsFlop( Amap_Tree_t * p, Amap_Item_t * pCell )
 
 /**Function*************************************************************
 
+  Synopsis    [Returns cell's function.]
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Amap_LibertyCellIsDontUse( Amap_Tree_t * p, Amap_Item_t * pCell )
+{
+    Amap_Item_t * pAttr;
+    Amap_ItemForEachChild( p, pCell, pAttr )
+        if ( !Amap_LibertyCompare(p, pAttr->Key, "dont_use") )
+            return 1;
+    return 0;
+}
+
+/**Function*************************************************************
+
   Synopsis    [Returns pin's function.]
 
   Description []
@@ -414,6 +434,12 @@ int Amap_LibertyPrintGenlib( Amap_Tree_t * p, char * pFileName, int fVerbose )
                 printf( "Amap_LibertyPrintGenlib() skipped sequential cell \"%s\".\n", Amap_LibertyGetString(p, pCell->Head) );
             continue;
         }
+        if ( Amap_LibertyCellIsDontUse(p, pCell) )
+        {
+            if ( fVerbose )
+                printf( "Amap_LibertyPrintGenlib() skipped cell \"%s\" due to dont_use attribute.\n", Amap_LibertyGetString(p, pCell->Head) );
+            continue;
+        }
         Counter = Amap_LibertyCellCountOutputs( p, pCell );
         if ( Counter == 0 )
         {
@@ -498,6 +524,12 @@ Vec_Str_t * Amap_LibertyPrintGenlibStr( Amap_Tree_t * p, int fVerbose )
                 printf( "Amap_LibertyPrintGenlib() skipped sequential cell \"%s\".\n", Amap_LibertyGetString(p, pCell->Head) );
             continue;
         }
+        if ( Amap_LibertyCellIsDontUse(p, pCell) )
+        {
+            if ( fVerbose )
+                printf( "Amap_LibertyPrintGenlib() skipped cell \"%s\" due to dont_use attribute.\n", Amap_LibertyGetString(p, pCell->Head) );
+            continue;
+        }
         Counter = Amap_LibertyCellCountOutputs( p, pCell );
         if ( Counter == 0 )
         {

src/map/scl/sclLiberty.c

@@ -629,6 +629,14 @@ int Scl_LibertyReadCellIsFlop( Scl_Tree_t * p, Scl_Item_t * pCell )
             return 1;
     return 0;
 }
+int Scl_LibertyReadCellIsDontUse( Scl_Tree_t * p, Scl_Item_t * pCell )
+{
+    Scl_Item_t * pAttr;
+    Scl_ItemForEachChild( p, pCell, pAttr )
+        if ( !Scl_LibertyCompare(p, pAttr->Key, "dont_use") )
+            return 1;
+    return 0;
+}
 char * Scl_LibertyReadCellArea( Scl_Tree_t * p, Scl_Item_t * pCell )
 {
     Scl_Item_t * pArea;
@@ -704,6 +712,11 @@ Vec_Str_t * Scl_LibertyReadGenlibStr( Scl_Tree_t * p, int fVerbose )
             if ( fVerbose )  printf( "Scl_LibertyReadGenlib() skipped sequential cell \"%s\".\n", Scl_LibertyReadString(p, pCell->Head) );
             continue;
         }
+        if ( Scl_LibertyReadCellIsDontUse(p, pCell) )
+        {
+            if ( fVerbose )  printf( "Scl_LibertyReadGenlib() skipped cell \"%s\" due to dont_use attribute.\n", Scl_LibertyReadString(p, pCell->Head) );
+            continue;
+        }
         if ( Scl_LibertyReadCellIsThreeState(p, pCell) )
         {
             if ( fVerbose )  printf( "Scl_LibertyReadGenlib() skipped three-state cell \"%s\".\n", Scl_LibertyReadString(p, pCell->Head) );
@@ -1417,7 +1430,7 @@ Vec_Str_t * Scl_LibertyReadSclStr( Scl_Tree_t * p, int fVerbose, int fVeryVerbos
     Vec_Wrd_t * vTruth;
     char * pFormula, * pName;
     int i, k, Counter, nOutputs, nCells;
-    int nSkipped[3] = {0};
+    int nSkipped[4] = {0};
 
     // read delay-table templates
     vTemples = Scl_LibertyReadTemplates( p );
@@ -1451,6 +1464,12 @@ Vec_Str_t * Scl_LibertyReadSclStr( Scl_Tree_t * p, int fVerbose, int fVeryVerbos
             nSkipped[0]++;
             continue;
         }
+        if ( Scl_LibertyReadCellIsDontUse(p, pCell) )
+        {
+            if ( fVeryVerbose )  printf( "Scl_LibertyReadGenlib() skipped cell \"%s\" due to dont_use attribute.\n", Scl_LibertyReadString(p, pCell->Head) );
+            nSkipped[3]++;
+            continue;
+        }
         if ( Scl_LibertyReadCellIsThreeState(p, pCell) )
         {
             if ( fVeryVerbose )  printf( "Scl_LibertyReadGenlib() skipped three-state cell \"%s\".\n", Scl_LibertyReadString(p, pCell->Head) );
@@ -1473,6 +1492,8 @@ Vec_Str_t * Scl_LibertyReadSclStr( Scl_Tree_t * p, int fVerbose, int fVeryVerbos
     {
         if ( Scl_LibertyReadCellIsFlop(p, pCell) )
             continue;
+        if ( Scl_LibertyReadCellIsDontUse(p, pCell) )
+            continue;
         if ( Scl_LibertyReadCellIsThreeState(p, pCell) )
             continue;
         if ( (Counter = Scl_LibertyReadCellOutputNum(p, pCell)) == 0 )
@@ -1640,8 +1661,8 @@ Vec_Str_t * Scl_LibertyReadSclStr( Scl_Tree_t * p, int fVerbose, int fVeryVerbos
     {
         printf( "Library \"%s\" from \"%s\" has %d cells ", 
             Scl_LibertyReadString(p, Scl_LibertyRoot(p)->Head), p->pFileName, nCells );
-        printf( "(%d skipped: %d seq; %d tri-state; %d no func).  ", 
-            nSkipped[0]+nSkipped[1]+nSkipped[2], nSkipped[0], nSkipped[1], nSkipped[2] );
+        printf( "(%d skipped: %d seq; %d tri-state; %d no func; %d dont_use).  ", 
+            nSkipped[0]+nSkipped[1]+nSkipped[2], nSkipped[0], nSkipped[1], nSkipped[2], nSkipped[3] );
         Abc_PrintTime( 1, "Time", Abc_Clock() - p->clkStart );
     }
     return vOut;