Supporting bit-wise XNOR operator in Wlc_Ntk_t.

src/base/wlc/wlc.h

@@ -61,6 +61,7 @@ typedef enum {
     WLC_OBJ_BIT_AND,       // 16: bitwise AND
     WLC_OBJ_BIT_OR,        // 17: bitwise OR
     WLC_OBJ_BIT_XOR,       // 18: bitwise XOR
+    WLC_OBJ_BIT_NXOR,      // 18: bitwise NXOR
     WLC_OBJ_BIT_SELECT,    // 19: bit selection
     WLC_OBJ_BIT_CONCAT,    // 20: bit concatenation
     WLC_OBJ_BIT_ZEROPAD,   // 21: zero padding

src/base/wlc/wlcBlast.c

@@ -930,13 +930,13 @@ Gia_Man_t * Wlc_NtkBitBlast( Wlc_Ntk_t * p, Vec_Int_t * vBoxIds )
             for ( k = 0; k < nRange; k++ )
                 Vec_IntPush( vRes, Gia_ManHashOr(pNew, pArg0[k], pArg1[k]) );
         }
-        else if ( pObj->Type == WLC_OBJ_BIT_XOR )
+        else if ( pObj->Type == WLC_OBJ_BIT_XOR || pObj->Type == WLC_OBJ_BIT_NXOR )
         {
             int nRangeMax = Abc_MaxInt( nRange, Abc_MaxInt(nRange0, nRange1) );
             int * pArg0 = Wlc_VecLoadFanins( vTemp0, pFans0, nRange0, nRangeMax, Wlc_ObjIsSignedFanin01(p, pObj) );
             int * pArg1 = Wlc_VecLoadFanins( vTemp1, pFans1, nRange1, nRangeMax, Wlc_ObjIsSignedFanin01(p, pObj) );
             for ( k = 0; k < nRange; k++ )
-                Vec_IntPush( vRes, Gia_ManHashXor(pNew, pArg0[k], pArg1[k]) );
+                Vec_IntPush( vRes, Abc_LitNotCond(Gia_ManHashXor(pNew, pArg0[k], pArg1[k]), pObj->Type == WLC_OBJ_BIT_NXOR) );
         }
         else if ( pObj->Type == WLC_OBJ_BIT_SELECT )
         {

src/base/wlc/wlcNtk.c

@@ -50,6 +50,7 @@ static char * Wlc_Names[WLC_OBJ_NUMBER+1] = {
     "&",                   // 16: bitwise AND
     "|",                   // 17: bitwise OR
     "^",                   // 18: bitwise XOR
+    "~|",                  // 18: bitwise NXOR
     "[:]",                 // 19: bit selection
     "{,}",                 // 20: bit concatenation
     "zeroPad",             // 21: zero padding
@@ -360,6 +361,8 @@ void Wlc_NtkPrintDistrib( Wlc_Ntk_t * p, int fVerbose )
             Vec_IntAddToEntry( vAnds, WLC_OBJ_BIT_OR,       Wlc_ObjRange(Wlc_ObjFanin0(p, pObj)) );
         else if ( pObj->Type == WLC_OBJ_BIT_XOR )      
             Vec_IntAddToEntry( vAnds, WLC_OBJ_BIT_XOR,  3 * Wlc_ObjRange(Wlc_ObjFanin0(p, pObj)) );
+        else if ( pObj->Type == WLC_OBJ_BIT_NXOR )      
+            Vec_IntAddToEntry( vAnds, WLC_OBJ_BIT_NXOR, 3 * Wlc_ObjRange(Wlc_ObjFanin0(p, pObj)) );
         else if ( pObj->Type == WLC_OBJ_BIT_SELECT )   
             Vec_IntAddToEntry( vAnds, WLC_OBJ_BIT_SELECT, 0 );
         else if ( pObj->Type == WLC_OBJ_BIT_CONCAT )   

src/base/wlc/wlcReadVer.c

@@ -782,10 +782,10 @@ static inline int Wlc_PrsFindDefinition( Wlc_Prs_t * p, char * pStr, Vec_Int_t *
             else if ( pStr[0] == '&' && pStr[1] != '&'                   ) pStr += 1, Type = WLC_OBJ_BIT_AND;       
             else if ( pStr[0] == '|' && pStr[1] != '|'                   ) pStr += 1, Type = WLC_OBJ_BIT_OR;        
             else if ( pStr[0] == '^' && pStr[1] != '^'                   ) pStr += 1, Type = WLC_OBJ_BIT_XOR;       
+            else if ( pStr[0] == '~' && pStr[1] == '^'                   ) pStr += 2, Type = WLC_OBJ_BIT_NXOR;       
             else if ( pStr[0] == '&' && pStr[1] == '&'                   ) pStr += 2, Type = WLC_OBJ_LOGIC_AND;     
             else if ( pStr[0] == '|' && pStr[1] == '|'                   ) pStr += 2, Type = WLC_OBJ_LOGIC_OR;      
             else if ( pStr[0] == '=' && pStr[1] == '='                   ) pStr += 2, Type = WLC_OBJ_COMP_EQU;      
-            else if ( pStr[0] == '~' && pStr[1] == '^'                   ) pStr += 2, Type = WLC_OBJ_COMP_EQU;      
             else if ( pStr[0] == '!' && pStr[1] == '='                   ) pStr += 2, Type = WLC_OBJ_COMP_NOTEQU;      
             else if ( pStr[0] == '<' && pStr[1] != '='                   ) pStr += 1, Type = WLC_OBJ_COMP_LESS;     
             else if ( pStr[0] == '>' && pStr[1] != '='                   ) pStr += 1, Type = WLC_OBJ_COMP_MORE;     

src/base/wlc/wlcWriteVer.c

@@ -308,6 +308,8 @@ void Wlc_WriteVerInt( FILE * pFile, Wlc_Ntk_t * p, int fNoFlops )
                     fprintf( pFile, "|" );
                 else if ( pObj->Type == WLC_OBJ_BIT_XOR )
                     fprintf( pFile, "^" );
+                else if ( pObj->Type == WLC_OBJ_BIT_NXOR )
+                    fprintf( pFile, "~^" );
                 else if ( pObj->Type == WLC_OBJ_LOGIC_AND )
                     fprintf( pFile, "&&" );
                 else if ( pObj->Type == WLC_OBJ_LOGIC_OR )