Fix in reading flop classes.

src/aig/gia/gia.h

@@ -141,6 +141,7 @@ struct Gia_Man_t_
     Vec_Int_t *    vGateClasses;  // classes of gates for abstraction
     Vec_Int_t *    vObjClasses;   // classes of objects for abstraction
     Vec_Int_t *    vInitClasses;  // classes of flops for retiming/merging/etc
+    Vec_Int_t *    vRegClasses;   // classes of registers for sequential synthesis
     Vec_Int_t *    vDoms;         // dominators
     Vec_Int_t *    vBarBufs;      // barrier buffers
     unsigned char* pSwitching;    // switching activity for each object

src/aig/gia/giaAiger.c

@@ -571,12 +571,10 @@ Gia_Man_t * Gia_AigerReadFromMemory( char * pContents, int nFileSize, int fSkipS
             // read flop classes
             else if ( *pCur == 'f' )
             {
-                int nFlops;
                 pCur++;
-                nFlops = Gia_AigerReadInt(pCur);  pCur += 4;
-                //assert( Gia_AigerReadInt(pCur) == 4*Gia_ManRegNum(pNew) );   pCur += 4; 
-                pNew->vFlopClasses  = Vec_IntStart( nFlops );
-                memcpy( Vec_IntArray(pNew->vFlopClasses),  pCur, 4*nFlops );   pCur += 4*nFlops;
+                assert( Gia_AigerReadInt(pCur) == 4*Gia_ManRegNum(pNew) );   pCur += 4;
+                pNew->vFlopClasses  = Vec_IntStart( Gia_ManRegNum(pNew) );
+                memcpy( Vec_IntArray(pNew->vFlopClasses),  pCur, 4*Gia_ManRegNum(pNew) );   pCur += 4*Gia_ManRegNum(pNew);
                 if ( fVerbose ) printf( "Finished reading extension \"f\".\n" );
             }
             // read gate classes
@@ -654,6 +652,16 @@ Gia_Man_t * Gia_AigerReadFromMemory( char * pContents, int nFileSize, int fSkipS
                 pNew->pPlacement = pPlacement;
                 if ( fVerbose ) printf( "Finished reading extension \"p\".\n" );
             }
+            // read register classes
+            else if ( *pCur == 'r' )
+            {
+                int nRegs;
+                pCur++;
+                nRegs = Gia_AigerReadInt(pCur);                         pCur += 4;
+                pNew->vRegClasses = Vec_IntStart( nRegs );
+                memcpy(Vec_IntArray(pNew->vRegClasses), pCur, 4*nRegs); pCur += 4*nRegs;
+                if ( fVerbose ) printf( "Finished reading extension \"r\".\n" );
+            }
             // read choices
             else if ( *pCur == 'q' )
             {
@@ -1188,9 +1196,9 @@ void Gia_AigerWrite( Gia_Man_t * pInit, char * pFileName, int fWriteSymbols, int
     if ( p->vFlopClasses )
     {
         fprintf( pFile, "f" );
-        Gia_FileWriteBufferSize( pFile, 4*Vec_IntSize(p->vFlopClasses) );
-        //assert( Vec_IntSize(p->vFlopClasses) == Gia_ManRegNum(p) );
-        fwrite( Vec_IntArray(p->vFlopClasses), 1, 4*Vec_IntSize(p->vFlopClasses), pFile );
+        Gia_FileWriteBufferSize( pFile, 4*Gia_ManRegNum(p) );
+        assert( Vec_IntSize(p->vFlopClasses) == Gia_ManRegNum(p) );
+        fwrite( Vec_IntArray(p->vFlopClasses), 1, 4*Gia_ManRegNum(p), pFile );
     }
     // write gate classes
     if ( p->vGateClasses )
@@ -1241,6 +1249,13 @@ void Gia_AigerWrite( Gia_Man_t * pInit, char * pFileName, int fWriteSymbols, int
         Gia_FileWriteBufferSize( pFile, 4*Gia_ManObjNum(p) );
         fwrite( p->pPlacement, 1, 4*Gia_ManObjNum(p), pFile );
     }
+    // write register classes
+    if ( p->vRegClasses )
+    {
+        fprintf( pFile, "r" );
+        Gia_FileWriteBufferSize( pFile, Vec_IntSize(p->vRegClasses) );
+        fwrite( Vec_IntArray(p->vRegClasses), 1, 4*Vec_IntSize(p->vRegClasses), pFile );
+    }
     // write choices
     if ( Gia_ManHasChoices(p) )
     {

src/aig/gia/giaMan.c

@@ -101,6 +101,7 @@ void Gia_ManStop( Gia_Man_t * p )
     Vec_IntFreeP( &p->vGateClasses );
     Vec_IntFreeP( &p->vObjClasses );
     Vec_IntFreeP( &p->vInitClasses );
+    Vec_IntFreeP( &p->vRegClasses );
     Vec_IntFreeP( &p->vDoms );
     Vec_IntFreeP( &p->vBarBufs );
     Vec_IntFreeP( &p->vLevels );
@@ -462,16 +463,14 @@ void Gia_ManPrintStats( Gia_Man_t * p, Gps_Par_t * pPars )
         Gia_ManPrintPlacement( p );
 //    if ( p->pManTime )
 //        Tim_ManPrintStats( (Tim_Man_t *)p->pManTime, p->nAnd2Delay );
-    // print register classes
-    if ( p->vFlopClasses && Gia_ManRegNum(p) == 0 )
-    {
-        printf( "The design has %d flops with the following class info: ", Vec_IntSize(p->vFlopClasses) );
-        Vec_IntPrint( p->vFlopClasses );
-    }
-    else
     Gia_ManPrintFlopClasses( p );
     Gia_ManPrintGateClasses( p );
     Gia_ManPrintObjClasses( p );
+    if ( p->vRegClasses )
+    {
+        printf( "The design has %d flops with the following class info: ", Vec_IntSize(p->vRegClasses) );
+        Vec_IntPrint( p->vRegClasses );
+    }
     if ( p->vInitClasses )
         Gia_ManPrintInitClasses( p->vInitClasses );
     if ( pPars && pPars->fTents )