Version abc51121

abc.plg

@@ -6,13 +6,13 @@
 --------------------Configuration: abc - Win32 Debug--------------------
 </h3>
 <h3>Command Lines</h3>
-Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF90.tmp" with contents
+Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSP1416.tmp" with contents
 [
 /nologo /MLd /W3 /Gm /GX /ZI /Od /I "src\base\abc" /I "src\base\abci" /I "src\base\abcs" /I "src\base\seq" /I "src\base\cmd" /I "src\base\io" /I "src\base\main" /I "src\bdd\cudd" /I "src\bdd\epd" /I "src\bdd\mtr" /I "src\bdd\parse" /I "src\bdd\dsd" /I "src\bdd\reo" /I "src\sop\ft" /I "src\sat\asat" /I "src\sat\msat" /I "src\sat\fraig" /I "src\opt\cut" /I "src\opt\dec" /I "src\opt\fxu" /I "src\opt\sim" /I "src\opt\rwr" /I "src\map\fpga" /I "src\map\pga" /I "src\map\mapper" /I "src\map\mapp" /I "src\map\mio" /I "src\map\super" /I "src\misc\extra" /I "src\misc\st" /I "src\misc\mvc" /I "src\misc\util" /I "src\misc\npn" /I "src\misc\vec" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /D "__STDC__" /D "HAVE_ASSERT_H" /FR"Debug/" /Fp"Debug/abc.pch" /YX /Fo"Debug/" /Fd"Debug/" /FD /GZ /c 
-"C:\_projects\abc\src\base\seq\seqFpgaCore.c"
+"C:\_projects\abc\src\base\seq\seqFpgaIter.c"
 ]
-Creating command line "cl.exe @C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF90.tmp" 
-Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF91.tmp" with contents
+Creating command line "cl.exe @C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSP1416.tmp" 
+Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSP1417.tmp" with contents
 [
 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /incremental:yes /pdb:"Debug/abc.pdb" /debug /machine:I386 /out:"_TEST/abc.exe" /pdbtype:sept 
 .\Debug\abcAig.obj
@@ -329,12 +329,12 @@ kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32
 .\Debug\mvcSort.obj
 .\Debug\mvcUtils.obj
 ]
-Creating command line "link.exe @C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF91.tmp"
+Creating command line "link.exe @C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSP1417.tmp"
 <h3>Output Window</h3>
 Compiling...
-seqFpgaCore.c
+seqFpgaIter.c
 Linking...
-Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF92.tmp" with contents
+Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSP1418.tmp" with contents
 [
 /nologo /o"Debug/abc.bsc" 
 .\Debug\abcAig.sbr
@@ -650,7 +650,7 @@ Creating temporary file "C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF92.tmp" with conte
 .\Debug\mvcPrint.sbr
 .\Debug\mvcSort.sbr
 .\Debug\mvcUtils.sbr]
-Creating command line "bscmake.exe @C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSPF92.tmp"
+Creating command line "bscmake.exe @C:\DOCUME~1\alanmi\LOCALS~1\Temp\RSP1418.tmp"
 Creating browse info file...
 <h3>Output Window</h3>
 

src/base/abc/abc.h

@@ -312,11 +312,6 @@ static inline Abc_Obj_t * Abc_ObjFanout0Ntk( Abc_Obj_t * pObj )      { return (A
 static inline bool        Abc_ObjFaninC( Abc_Obj_t * pObj, int i )   { return pObj->vFanins.pArray[i].fCompl;                               }
 static inline bool        Abc_ObjFaninC0( Abc_Obj_t * pObj )         { return pObj->vFanins.pArray[0].fCompl;                               }
 static inline bool        Abc_ObjFaninC1( Abc_Obj_t * pObj )         { return pObj->vFanins.pArray[1].fCompl;                               }
-static inline int         Abc_ObjFaninL( Abc_Obj_t * pObj, int i )   { return pObj->vFanins.pArray[i].nLats;                                }
-static inline int         Abc_ObjFaninL0( Abc_Obj_t * pObj )         { return pObj->vFanins.pArray[0].nLats;                                }
-static inline int         Abc_ObjFaninL1( Abc_Obj_t * pObj )         { return pObj->vFanins.pArray[1].nLats;                                }
-static inline int         Abc_ObjFaninLMin( Abc_Obj_t * pObj )       {  assert( Abc_ObjIsNode(pObj) ); return ABC_MIN( Abc_ObjFaninL0(pObj), Abc_ObjFaninL1(pObj) ); }
-static inline int         Abc_ObjFaninLMax( Abc_Obj_t * pObj )       {  assert( Abc_ObjIsNode(pObj) ); return ABC_MAX( Abc_ObjFaninL0(pObj), Abc_ObjFaninL1(pObj) ); }
 static inline Abc_Obj_t * Abc_ObjChild( Abc_Obj_t * pObj, int i )    { return Abc_ObjNotCond( Abc_ObjFanin(pObj,i), Abc_ObjFaninC(pObj,i) );}
 static inline Abc_Obj_t * Abc_ObjChild0( Abc_Obj_t * pObj )          { return Abc_ObjNotCond( Abc_ObjFanin0(pObj), Abc_ObjFaninC0(pObj) );  }
 static inline Abc_Obj_t * Abc_ObjChild1( Abc_Obj_t * pObj )          { return Abc_ObjNotCond( Abc_ObjFanin1(pObj), Abc_ObjFaninC1(pObj) );  }
@@ -325,15 +320,6 @@ static inline Abc_Obj_t * Abc_ObjChild0Copy( Abc_Obj_t * pObj )      { return Ab
 static inline Abc_Obj_t * Abc_ObjChild1Copy( Abc_Obj_t * pObj )      { return Abc_ObjNotCond( Abc_ObjFanin1(pObj)->pCopy, Abc_ObjFaninC1(pObj) );  }
 static inline void        Abc_ObjSetFaninC( Abc_Obj_t * pObj, int i ){ pObj->vFanins.pArray[i].fCompl = 1;                               }
 static inline void        Abc_ObjXorFaninC( Abc_Obj_t * pObj, int i ){ pObj->vFanins.pArray[i].fCompl ^= 1;                              }
-static inline void        Abc_ObjSetFaninL( Abc_Obj_t * pObj, int i, int nLats )  { pObj->vFanins.pArray[i].nLats = nLats;               }
-static inline void        Abc_ObjSetFaninL0( Abc_Obj_t * pObj, int nLats )        { pObj->vFanins.pArray[0].nLats = nLats;               }
-static inline void        Abc_ObjSetFaninL1( Abc_Obj_t * pObj, int nLats )        { pObj->vFanins.pArray[1].nLats = nLats;               }
-static inline void        Abc_ObjAddFaninL( Abc_Obj_t * pObj, int i, int nLats )  { pObj->vFanins.pArray[i].nLats += nLats;              }
-static inline void        Abc_ObjAddFaninL0( Abc_Obj_t * pObj, int nLats )        { pObj->vFanins.pArray[0].nLats += nLats;              }
-static inline void        Abc_ObjAddFaninL1( Abc_Obj_t * pObj, int nLats )        { pObj->vFanins.pArray[1].nLats += nLats;              }
-static inline int         Abc_ObjFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout )               {  return Abc_ObjFaninL( pFanout, Abc_ObjFanoutEdgeNum(pObj,pFanout) );     }
-static inline void        Abc_ObjSetFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout, int nLats ) {  Abc_ObjSetFaninL( pFanout, Abc_ObjFanoutEdgeNum(pObj,pFanout), nLats );  }
-static inline void        Abc_ObjAddFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout, int nLats ) {  Abc_ObjAddFaninL( pFanout, Abc_ObjFanoutEdgeNum(pObj,pFanout), nLats );  }
 
 // checking the node type
 static inline bool        Abc_NodeIsAigAnd( Abc_Obj_t * pNode )      { assert(Abc_NtkHasAig(pNode->pNtk));           return Abc_ObjFaninNum(pNode) == 2;                         }

src/base/abc/abcFanio.c

@@ -19,6 +19,7 @@
 ***********************************************************************/
 
 #include "abc.h"
+#include "seqInt.h"
 
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
@@ -146,14 +147,13 @@ void Abc_ObjPatchFanin( Abc_Obj_t * pObj, Abc_Obj_t * pFaninOld, Abc_Obj_t * pFa
     }
     // remember the attributes of the old fanin
     fCompl = Abc_ObjFaninC(pObj, iFanin);
-    nLats  = Abc_ObjFaninL(pObj, iFanin);
     // replace the old fanin entry by the new fanin entry (removes attributes)
     Vec_FanWriteEntry( &pObj->vFanins, iFanin, Vec_Int2Fan(pFaninNewR->Id) );
     // set the attributes of the new fanin
     if ( fCompl ^ Abc_ObjIsComplement(pFaninNew) )
         Abc_ObjSetFaninC( pObj, iFanin );
-    if ( nLats )
-        Abc_ObjSetFaninL( pObj, iFanin, nLats );
+    if ( Abc_NtkIsSeq(pObj->pNtk) && (nLats = Seq_ObjFaninL(pObj, iFanin)) )
+        Seq_ObjSetFaninL( pObj, iFanin, nLats );
     // update the fanout of the fanin
     if ( !Vec_FanDeleteEntry( &pFaninOld->vFanouts, pObj->Id ) )
     {

src/base/abc/abcNtk.c

@@ -22,7 +22,7 @@
 #include "abcInt.h"
 #include "main.h"
 #include "mio.h"
-#include "seq.h"
+#include "seqInt.h"
 
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
@@ -322,7 +322,7 @@ Abc_Ntk_t * Abc_NtkDup( Abc_Ntk_t * pNtk )
                 Abc_ObjAddFanin( pObj->pCopy, pFanin->pCopy );
                 if ( Abc_ObjFaninC(pObj, k) )
                     Abc_ObjSetFaninC( pObj->pCopy, k );
-                if ( Abc_ObjFaninL(pObj, k) > 0 )
+                if ( Seq_ObjFaninL(pObj, k) )
                     Seq_NodeDupLats( pObj->pCopy, pObj, k );
             }
         }

src/base/abci/abc.c

@@ -901,7 +901,7 @@ int Abc_CommandPrintKMap( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsBddLogic(pNtk) )
     {
-        fprintf( pErr, "Visualizing BDDs can only be done for logic BDD networks (run \"bdd\").\n" );
+        fprintf( pErr, "Visualizing Karnaugh map works for BDD logic networks (run \"bdd\").\n" );
         return 1;
     }
     if ( argc > util_optind + 1 )
@@ -1388,6 +1388,11 @@ int Abc_CommandBalance( Abc_Frame_t * pAbc, int argc, char ** argv )
         fprintf( pErr, "Empty network.\n" );
         return 1;
     }
+    if ( Abc_NtkIsSeq(pNtk) )
+    {
+        fprintf( pErr, "Balancing cannot be applied to a sequential AIG.\n" );
+        return 1;
+    }
 
     // get the new network
     if ( Abc_NtkIsStrash(pNtk) )
@@ -2731,7 +2736,7 @@ int Abc_CommandExtSeqDcs( Abc_Frame_t * pAbc, int argc, char ** argv )
     }
     if ( !Abc_NtkIsStrash(pNtk) )
     {
-        fprintf( stdout, "This command works only for AIGs (run \"strash\").\n" );
+        fprintf( stdout, "Extracting sequential don't-cares works only for AIGs (run \"strash\").\n" );
         return 0;
     }
     if ( !Abc_NtkExtractSequentialDcs( pNtk, fVerbose ) )
@@ -4279,7 +4284,7 @@ int Abc_CommandSuperChoice( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsStrash(pNtk) )
     {
-        fprintf( pErr, "Works only for the AIG representation (run \"strash\").\n" );
+        fprintf( pErr, "Superchoicing works only for the AIG representation (run \"strash\").\n" );
         return 1;
     }
 
@@ -4736,7 +4741,7 @@ int Abc_CommandSeq( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
     FILE * pOut, * pErr;
     Abc_Ntk_t * pNtk, * pNtkRes;
-    int c;
+    int c, nLoops;
 
     pNtk = Abc_FrameReadNet(pAbc);
     pOut = Abc_FrameReadOut(pAbc);
@@ -4769,14 +4774,14 @@ int Abc_CommandSeq( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsStrash(pNtk) )
     {
-        fprintf( pErr, "Works only for AIG (run \"strash\").\n" );
+        fprintf( pErr, "Conversion to sequential AIG works only for combinational AIGs (run \"strash\").\n" );
         return 1;
     }
 
-    if ( Abc_NtkCountSelfFeedLatches(pNtk) )
+    if ( nLoops = Abc_NtkCountSelfFeedLatches(pNtk) )
     {
-        fprintf( pErr, "Sequential AIG cannot be created for designs with self-feeding latches.\n" );
-        return 1;
+        fprintf( pErr, "Cannot create sequential AIG because the network contains %d self-feeding latches.\n", nLoops );
+        return 0;
     }
 
     // get the new network
@@ -4844,7 +4849,7 @@ int Abc_CommandUnseq( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsSeq(pNtk) )
     {
-        fprintf( pErr, "Works only for sequential AIG (run \"seq\").\n" );
+        fprintf( pErr, "Conversion to combinational AIG works only for sequential AIG (run \"seq\").\n" );
         return 1;
     }
 
@@ -4891,6 +4896,7 @@ int Abc_CommandRetime( Abc_Frame_t * pAbc, int argc, char ** argv )
     int fBackward;
     int fInitial;
     int fVerbose;
+    int nLoops;
 
     pNtk = Abc_FrameReadNet(pAbc);
     pOut = Abc_FrameReadOut(pAbc);
@@ -4933,8 +4939,14 @@ int Abc_CommandRetime( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsSeq(pNtk) )
     {
-        fprintf( pErr, "Works only for sequential AIG (run \"seq\").\n" );
-        return 1;
+        fprintf( pErr, "Retiming works only for sequential AIG (run \"seq\").\n" );
+        return 0;
+    }
+
+    if ( nLoops = Abc_NtkCountSelfFeedLatches(pNtk) )
+    {
+        fprintf( pErr, "Cannot retime because the network contains %d self-feeding latches.\n", nLoops );
+        return 0;
     }
 
     // get the new network
@@ -4979,7 +4991,7 @@ int Abc_CommandSeqFpga( Abc_Frame_t * pAbc, int argc, char ** argv )
     pErr = Abc_FrameReadErr(pAbc);
 
     // set defaults
-    fVerbose = 1;
+    fVerbose = 0;
     util_getopt_reset();
     while ( ( c = util_getopt( argc, argv, "vh" ) ) != EOF )
     {
@@ -5003,20 +5015,16 @@ int Abc_CommandSeqFpga( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsSeq(pNtk) )
     {
-        fprintf( pErr, "Works only for sequential AIG (run \"seq\").\n" );
-        return 1;
+        fprintf( pErr, "Sequential FPGA mapping works only for sequential AIG (run \"seq\").\n" );
+        return 0;
     }
 
-//    printf( "This command is not yet implemented.\n" );
-//    return 0;
-
-
     // get the new network
     pNtkRes = Seq_NtkFpgaMapRetime( pNtk, fVerbose );
     if ( pNtkRes == NULL )
     {
         fprintf( pErr, "Sequential FPGA mapping has failed.\n" );
-        return 1;
+        return 0;
     }
     // replace the current network
     Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
@@ -5078,7 +5086,7 @@ int Abc_CommandSeqMap( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsSeq(pNtk) )
     {
-        fprintf( pErr, "Works only for sequential AIG (run \"seq\").\n" );
+        fprintf( pErr, "Sequential standard cell mapping works only for sequential AIG (run \"seq\").\n" );
         return 1;
     }
 
@@ -5178,7 +5186,7 @@ int Abc_CommandSeqSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( Abc_NtkIsSeq(pNtk) )
     {
-        fprintf( pErr, "Works only for combinational networks (run \"unseq\").\n" );
+        fprintf( pErr, "Sequential sweep works only for combinational networks (run \"unseq\").\n" );
         return 1;
     }
 
@@ -5190,7 +5198,7 @@ int Abc_CommandSeqSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( !Abc_NtkIsStrash(pNtk) )
     {
-        fprintf( pErr, "Works only for structurally hashed networks (run \"strash\").\n" );
+        fprintf( pErr, "Sequential sweep works only for structurally hashed networks (run \"strash\").\n" );
         return 1;
     }
 

src/base/abci/abcCut.c

@@ -20,6 +20,7 @@
 
 #include "abc.h"
 #include "cut.h"
+#include "seqInt.h"
 
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
@@ -196,7 +197,10 @@ Cut_Man_t * Abc_NtkSeqCuts( Abc_Ntk_t * pNtk, Cut_Params_t * pParams )
     pParams->nCutSet = Abc_NtkCutSetNodeNum( pNtk );
     p = Cut_ManStart( pParams );
 
-    // set cuts for PIs
+    // set cuts for the constant node and the PIs
+    pObj = Abc_NtkConst1(pNtk);
+    if ( Abc_ObjFanoutNum(pObj) > 0 )
+        Cut_NodeSetTriv( p, pObj->Id );
     Abc_NtkForEachPi( pNtk, pObj, i )
         Cut_NodeSetTriv( p, pObj->Id );
     // label the cutset nodes and set their number in the array
@@ -240,8 +244,11 @@ Cut_Man_t * Abc_NtkSeqCuts( Abc_Ntk_t * pNtk, Cut_Params_t * pParams )
     // unlabel the cutset nodes
     Abc_SeqForEachCutsetNode( pNtk, pObj, i )
         pObj->fMarkC = 0;
+if ( pParams->fVerbose )
+{
 PRT( "Total", clock() - clk );
 printf( "Converged after %d iterations.\n", nIters );
+}
 //Abc_NtkPrintCuts( p, pNtk, 1 );
     return p;
 }
@@ -306,7 +313,7 @@ void Abc_NodeGetCutsSeq( void * p, Abc_Obj_t * pObj, int fTriv )
     fTriv     = pObj->fMarkC ? 0 : fTriv;
     CutSetNum = pObj->fMarkC ? (int)pObj->pCopy : -1;
     Cut_NodeComputeCutsSeq( p, pObj->Id, Abc_ObjFaninId0(pObj), Abc_ObjFaninId1(pObj),  
-        Abc_ObjFaninC0(pObj), Abc_ObjFaninC1(pObj), Abc_ObjFaninL0(pObj), Abc_ObjFaninL1(pObj), fTriv, CutSetNum );  
+        Abc_ObjFaninC0(pObj), Abc_ObjFaninC1(pObj), Seq_ObjFaninL0(pObj), Seq_ObjFaninL1(pObj), fTriv, CutSetNum );  
 }
 
 /**Function*************************************************************

src/base/io/ioWriteDot.c

@@ -19,7 +19,7 @@
 ***********************************************************************/
 
 #include "io.h"
-#include "seq.h"
+#include "seqInt.h"
 
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
@@ -315,7 +315,7 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
             fprintf( pFile, "Node%d%s",  Abc_ObjFaninId0(pNode), (Abc_ObjIsLatch(Abc_ObjFanin0(pNode))? "_out":"") );
             fprintf( pFile, " [" );
             fprintf( pFile, "style = %s", Abc_ObjFaninC0(pNode)? "dotted" : "bold" );
-            if ( Abc_ObjFaninL0(pNode) > 0 )
+            if ( Seq_ObjFaninL0(pNode) > 0 )
             fprintf( pFile, ", label = \"%s\"", Seq_ObjFaninGetInitPrintable(pNode,0) );
             fprintf( pFile, "]" );
             fprintf( pFile, ";\n" );
@@ -330,7 +330,7 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
             fprintf( pFile, "Node%d%s",  Abc_ObjFaninId1(pNode), (Abc_ObjIsLatch(Abc_ObjFanin1(pNode))? "_out":"") );
             fprintf( pFile, " [" );
             fprintf( pFile, "style = %s", Abc_ObjFaninC1(pNode)? "dotted" : "bold" );
-            if ( Abc_ObjFaninL1(pNode) > 0 )
+            if ( Seq_ObjFaninL1(pNode) > 0 )
             fprintf( pFile, ", label = \"%s\"", Seq_ObjFaninGetInitPrintable(pNode,1) );
             fprintf( pFile, "]" );
             fprintf( pFile, ";\n" );

src/base/io/ioWriteList.c

@@ -19,6 +19,7 @@
 ***********************************************************************/
 
 #include "io.h"
+#include "seqInt.h"
 
 /*
 -------- Original Message --------
@@ -156,7 +157,7 @@ void Io_WriteListEdge( FILE * pFile, Abc_Obj_t * pObj )
     fprintf( pFile, "%-10s >    ", Abc_ObjName(pObj) );
     Abc_ObjForEachFanout( pObj, pFanout, i )
     {
-        fprintf( pFile, " %s ([%s_to_%s] = %d)", Abc_ObjName(pFanout), Abc_ObjName(pObj), Abc_ObjName(pFanout), Abc_ObjFanoutL(pObj, pFanout) );
+        fprintf( pFile, " %s ([%s_to_%s] = %d)", Abc_ObjName(pFanout), Abc_ObjName(pObj), Abc_ObjName(pFanout), Seq_ObjFanoutL(pObj, pFanout) );
         if ( i == Abc_ObjFanoutNum(pObj) - 1 )
             fprintf( pFile, "." );
         else

src/base/seq/seq.h

@@ -68,6 +68,7 @@ extern int             Seq_NtkLatchNum( Abc_Ntk_t * pNtk );
 extern int             Seq_NtkLatchNumMax( Abc_Ntk_t * pNtk );
 extern int             Seq_NtkLatchNumShared( Abc_Ntk_t * pNtk );
 extern void            Seq_NtkLatchGetInitNums( Abc_Ntk_t * pNtk, int * pInits );
+extern int             Seq_NtkLatchGetEqualFaninNum( Abc_Ntk_t * pNtk );
 
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///

src/base/seq/seqCreate.c

@@ -158,6 +158,7 @@ Abc_Ntk_t * Abc_NtkAigToSeq( Abc_Ntk_t * pNtk )
 
     // set the cutset composed of latch drivers
     Abc_NtkAigCutsetCopy( pNtk );
+    Seq_NtkLatchGetEqualFaninNum( pNtkNew );
 
     // copy EXDC and check correctness
     if ( pNtkNew->pExdc )
@@ -280,7 +281,7 @@ Abc_Ntk_t * Abc_NtkSeqToLogicSop( Abc_Ntk_t * pNtk )
         if ( Abc_ObjFaninNum(pObj) == 0 )
             continue;
         // create the edge
-        pFaninNew = Abc_NodeSeqToLogic( pNtkNew, Abc_ObjFanin0(pObj), Seq_NodeGetRing(pObj,0), Abc_ObjFaninL0(pObj) );
+        pFaninNew = Abc_NodeSeqToLogic( pNtkNew, Abc_ObjFanin0(pObj), Seq_NodeGetRing(pObj,0), Seq_ObjFaninL0(pObj) );
         Abc_ObjAddFanin( pObj->pCopy, pFaninNew );
         if ( Abc_ObjFaninNum(pObj) == 1 )
         {
@@ -290,7 +291,7 @@ Abc_Ntk_t * Abc_NtkSeqToLogicSop( Abc_Ntk_t * pNtk )
             continue;
         }
         // create the edge
-        pFaninNew = Abc_NodeSeqToLogic( pNtkNew, Abc_ObjFanin1(pObj), Seq_NodeGetRing(pObj,1), Abc_ObjFaninL1(pObj) );
+        pFaninNew = Abc_NodeSeqToLogic( pNtkNew, Abc_ObjFanin1(pObj), Seq_NodeGetRing(pObj,1), Seq_ObjFaninL1(pObj) );
         Abc_ObjAddFanin( pObj->pCopy, pFaninNew );
         // the complemented edges are subsumed by the node function
     }

src/base/seq/seqFpgaIter.c

@@ -63,7 +63,7 @@ void Seq_FpgaMappingDelays( Abc_Ntk_t * pNtk, int fVerbose )
     pParams->fTruth    = 0;     // compute truth tables
     pParams->fFilter   = 1;     // filter dominated cuts
     pParams->fSeq      = 1;     // compute sequential cuts
-    pParams->fVerbose  = 0;     // the verbosiness flag
+    pParams->fVerbose  = fVerbose;     // the verbosiness flag
 
     // compute the cuts
 clk = clock();
@@ -84,7 +84,8 @@ p->timeDelay = clock() - clk;
     Abc_NtkForEachPo( pNtk, pObj, i )
         Seq_FpgaMappingCollectNode_rec( Abc_ObjFanin0(pObj), p->vMapAnds, p->vMapCuts );
 
-printf( "The number of LUTs = %d.\n", Vec_PtrSize(p->vMapAnds) );
+    if ( fVerbose )
+    printf( "The number of LUTs = %d.\n", Vec_PtrSize(p->vMapAnds) );
 
     // remove the cuts
     Cut_ManStop( p->pCutMan );
@@ -151,7 +152,7 @@ Cut_Cut_t * Seq_FpgaMappingSelectCut( Abc_Obj_t * pAnd )
     int ArrivalCut, ArrivalMin, i;
     // get the arrival time of the best non-trivial cut
     ArrivalMin = Seq_NodeGetLValue( pAnd );
-    // iterate through the cuts and with the one with the minimum cost
+    // iterate through the cuts and select the one with the minimum cost
     pList = Abc_NodeReadCuts( Seq_NodeCutMan(pAnd), pAnd );
     CostMin = ABC_INFINITY;
     pCutBest = NULL;
@@ -231,7 +232,7 @@ int Seq_FpgaNodeUpdateLValue( Abc_Obj_t * pObj, int Fi )
     assert( Abc_ObjFaninNum(pObj) > 0 );
     if ( Abc_ObjIsPo(pObj) )
     {
-        lValueNew = Seq_NodeGetLValue(Abc_ObjFanin0(pObj)) - Fi * Abc_ObjFaninL0(pObj);
+        lValueNew = Seq_NodeGetLValue(Abc_ObjFanin0(pObj)) - Fi * Seq_ObjFaninL0(pObj);
         return (lValueNew > Fi)? SEQ_UPDATE_FAIL : SEQ_UPDATE_NO;
     }
     // get the arrival time of the best non-trivial cut

src/base/seq/seqInt.h

@@ -48,6 +48,7 @@ struct Abc_Seq_t_
     // sequential information
     Abc_Ntk_t *         pNtk;           // the network
     int                 nSize;          // the number of entries in all internal arrays
+    Vec_Int_t *         vNums;          // the number of latches on each edge in the AIG
     Vec_Ptr_t *         vInits;         // the initial states for each edge in the AIG
     Extra_MmFixed_t *   pMmInits;       // memory manager for latch structures used to remember init states
     int                 fVerbose;       // the verbose flag
@@ -104,18 +105,29 @@ static inline Seq_RetEdge_t  Seq_Int2RetEdge( int Num )            { return *((S
 static inline int            Seq_RetStep2Int( Seq_RetStep_t Val )  { return *((int *)&Val);           }
 static inline Seq_RetStep_t  Seq_Int2RetStep( int Num )            { return *((Seq_RetStep_t *)&Num); }
 
+// manipulating the number of latches on each edge
+static inline Vec_Int_t *    Seq_ObjLNums( Abc_Obj_t * pObj )                        { return ((Abc_Seq_t*)pObj->pNtk->pManFunc)->vNums;                    }
+static inline int            Seq_ObjFaninL( Abc_Obj_t * pObj, int i )                { return Vec_IntEntry(Seq_ObjLNums(pObj), 2*pObj->Id + i);             }
+static inline int            Seq_ObjFaninL0( Abc_Obj_t * pObj )                      { return Vec_IntEntry(Seq_ObjLNums(pObj), 2*pObj->Id + 0);             }
+static inline int            Seq_ObjFaninL1( Abc_Obj_t * pObj )                      { return Vec_IntEntry(Seq_ObjLNums(pObj), 2*pObj->Id + 1);             }
+static inline void           Seq_ObjSetFaninL( Abc_Obj_t * pObj, int i, int nLats )  { Vec_IntWriteEntry(Seq_ObjLNums(pObj), 2*pObj->Id + i, nLats);        }
+static inline void           Seq_ObjSetFaninL0( Abc_Obj_t * pObj, int nLats )        { Vec_IntWriteEntry(Seq_ObjLNums(pObj), 2*pObj->Id + 0, nLats);        }
+static inline void           Seq_ObjSetFaninL1( Abc_Obj_t * pObj, int nLats )        { Vec_IntWriteEntry(Seq_ObjLNums(pObj), 2*pObj->Id + 1, nLats);        }
+static inline void           Seq_ObjAddFaninL( Abc_Obj_t * pObj, int i, int nLats )  { Vec_IntAddToEntry(Seq_ObjLNums(pObj), 2*pObj->Id + i, nLats);        }
+static inline void           Seq_ObjAddFaninL0( Abc_Obj_t * pObj, int nLats )        { Vec_IntAddToEntry(Seq_ObjLNums(pObj), 2*pObj->Id + 0, nLats);        }
+static inline void           Seq_ObjAddFaninL1( Abc_Obj_t * pObj, int nLats )        { Vec_IntAddToEntry(Seq_ObjLNums(pObj), 2*pObj->Id + 1, nLats);        }
+static inline int            Seq_ObjFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout ) { return Seq_ObjFaninL( pFanout, Abc_ObjFanoutEdgeNum(pObj,pFanout) ); }
+static inline void           Seq_ObjSetFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout, int nLats ) {  Seq_ObjSetFaninL( pFanout, Abc_ObjFanoutEdgeNum(pObj,pFanout), nLats );  }
+static inline void           Seq_ObjAddFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout, int nLats ) {  Seq_ObjAddFaninL( pFanout, Abc_ObjFanoutEdgeNum(pObj,pFanout), nLats );  }
+static inline int            Seq_ObjFaninLMin( Abc_Obj_t * pObj )                    {  assert( Abc_ObjIsNode(pObj) ); return ABC_MIN( Seq_ObjFaninL0(pObj), Seq_ObjFaninL1(pObj) ); }
+static inline int            Seq_ObjFaninLMax( Abc_Obj_t * pObj )                    {  assert( Abc_ObjIsNode(pObj) ); return ABC_MAX( Seq_ObjFaninL0(pObj), Seq_ObjFaninL1(pObj) ); }
+
 // reading l-values and lags
 static inline Vec_Int_t *    Seq_NodeLValues( Abc_Obj_t * pNode )                    { return ((Abc_Seq_t *)(pNode)->pNtk->pManFunc)->vLValues;           }
 static inline int            Seq_NodeGetLValue( Abc_Obj_t * pNode )                  { return Vec_IntEntry( Seq_NodeLValues(pNode), (pNode)->Id );        }
 static inline void           Seq_NodeSetLValue( Abc_Obj_t * pNode, int Value )       { Vec_IntWriteEntry( Seq_NodeLValues(pNode), (pNode)->Id, Value );   }
 static inline int            Seq_NodeComputeLag( int LValue, int Fi )                { return (LValue + 1024*Fi)/Fi - 1024 - (int)(LValue % Fi == 0);     }
 
-// reading best cuts at each node
-static inline Cut_Man_t *    Seq_NodeCutMan( Abc_Obj_t * pNode )                { return ((Abc_Seq_t *)(pNode)->pNtk->pManFunc)->pCutMan;                 }
-//static inline Vec_Ptr_t *    Seq_NodeCutBests( Abc_Obj_t * pNode )              { return ((Abc_Seq_t *)(pNode)->pNtk->pManFunc)->vBestCuts;               }
-//static inline Cut_Cut_t *    Seq_NodeGetCutBest( Abc_Obj_t * pNode )            { return Vec_PtrEntry( Seq_NodeCutBests(pNode), (pNode)->Id );            }
-//static inline void           Seq_NodeSetCutBest( Abc_Obj_t * pNode, Cut_Cut_t * pCut ) { Vec_PtrWriteEntry( Seq_NodeCutBests(pNode), (pNode)->Id, pCut ); }
-
 // reading the contents of the lat
 static inline Abc_InitType_t Seq_LatInit( Seq_Lat_t * pLat )  { return ((unsigned)pLat->pPrev) & 3;                                 }
 static inline Seq_Lat_t *    Seq_LatNext( Seq_Lat_t * pLat )  { return pLat->pNext;                                                 }
@@ -127,6 +139,7 @@ static inline void           Seq_LatSetNext( Seq_Lat_t * pLat, Seq_Lat_t * pNext
 static inline void           Seq_LatSetPrev( Seq_Lat_t * pLat, Seq_Lat_t * pPrev )    { Abc_InitType_t Init = Seq_LatInit(pLat);  pLat->pPrev = pPrev;  Seq_LatSetInit(pLat, Init); }
 
 // accessing retiming lags
+static inline Cut_Man_t *    Seq_NodeCutMan( Abc_Obj_t * pNode )                      { return ((Abc_Seq_t *)(pNode)->pNtk->pManFunc)->pCutMan;                 }
 static inline Vec_Str_t *    Seq_NodeLags( Abc_Obj_t * pNode )                        { return ((Abc_Seq_t *)(pNode)->pNtk->pManFunc)->vLags;            }
 static inline char           Seq_NodeGetLag( Abc_Obj_t * pNode )                      { return Vec_StrEntry( Seq_NodeLags(pNode), (pNode)->Id );         }
 static inline void           Seq_NodeSetLag( Abc_Obj_t * pNode, char Value )          { Vec_StrWriteEntry( Seq_NodeLags(pNode), (pNode)->Id, (Value) );  }

src/base/seq/seqLatch.c

@@ -60,7 +60,7 @@ void Seq_NodeInsertFirst( Abc_Obj_t * pObj, int Edge, Abc_InitType_t Init )
         Seq_NodeSetRing( pObj, Edge, pLat );  // rotate the ring to make pLat the first
     }
     Seq_LatSetInit( pLat, Init );
-    Abc_ObjAddFaninL( pObj, Edge, 1 );
+    Seq_ObjAddFaninL( pObj, Edge, 1 );
 }
 
 /**Function*************************************************************
@@ -94,7 +94,7 @@ void Seq_NodeInsertLast( Abc_Obj_t * pObj, int Edge, Abc_InitType_t Init )
         Seq_LatSetNext( pLat, pRing );
     }
     Seq_LatSetInit( pLat, Init );
-    Abc_ObjAddFaninL( pObj, Edge, 1 );
+    Seq_ObjAddFaninL( pObj, Edge, 1 );
 }
 
 /**Function*************************************************************
@@ -126,7 +126,7 @@ Abc_InitType_t Seq_NodeDeleteFirst( Abc_Obj_t * pObj, int Edge )
     }
     Init = Seq_LatInit( pLat );
     Seq_NodeRecycleLat( pObj, pLat );
-    Abc_ObjAddFaninL( pObj, Edge, -1 );
+    Seq_ObjAddFaninL( pObj, Edge, -1 );
     return Init;
 }
 
@@ -158,7 +158,7 @@ Abc_InitType_t Seq_NodeDeleteLast( Abc_Obj_t * pObj, int Edge )
     }
     Init = Seq_LatInit( pLat );
     Seq_NodeRecycleLat( pObj, pLat ); 
-    Abc_ObjAddFaninL( pObj, Edge, -1 );
+    Seq_ObjAddFaninL( pObj, Edge, -1 );
     return Init;
 }
 

src/base/seq/seqMan.c

@@ -51,6 +51,7 @@ Abc_Seq_t * Seq_Create( Abc_Ntk_t * pNtk )
     p->nSize = 1000;
     p->pMmInits = Extra_MmFixedStart( sizeof(Seq_Lat_t) );
     // create internal data structures
+    p->vNums    = Vec_IntStart( 2 * p->nSize ); 
     p->vInits   = Vec_PtrStart( 2 * p->nSize ); 
     p->vLValues = Vec_IntStart( p->nSize ); 
     p->vLags    = Vec_StrStart( p->nSize ); 
@@ -73,6 +74,7 @@ void Seq_Resize( Abc_Seq_t * p, int nMaxId )
     if ( p->nSize > nMaxId )
         return;
     p->nSize = nMaxId + 1;
+    Vec_IntFill( p->vNums,     2 * p->nSize, 0 ); 
     Vec_PtrFill( p->vInits,    2 * p->nSize, NULL ); 
     Vec_IntFill( p->vLValues,  p->nSize, 0 ); 
     Vec_StrFill( p->vLags,     p->nSize, 0 ); 
@@ -97,6 +99,7 @@ void Seq_Delete( Abc_Seq_t * p )
     if ( p->vLValues )  Vec_IntFree( p->vLValues );  // the arrival times (L-Values of nodes)
     if ( p->vLags )     Vec_StrFree( p->vLags );     // the lags of the mapped nodes
     if ( p->vInits )    Vec_PtrFree( p->vInits );    // the initial values of the latches
+    if ( p->vNums )     Vec_IntFree( p->vNums );     // the numbers of latches
     Extra_MmFixedStop( p->pMmInits, 0 );
     free( p );
 }

src/base/seq/seqRetIter.c

@@ -78,6 +78,23 @@ void Seq_NtkRetimeDelayLags( Abc_Ntk_t * pNtk, int fVerbose )
         NodeLag = Seq_NodeComputeLag( Seq_NodeGetLValue(pNode), FiBest );
         Seq_NodeSetLag( pNode, NodeLag );
     }
+/*
+    {
+        Abc_Obj_t * pFanin, * pFanout;
+        pNode = Abc_NtkObj( pNtk, 823 );
+        printf( "Node  %d.  Lag = %d. LValue = %d. Latches = (%d,%d) (%d,%d).\n", pNode->Id, Seq_NodeGetLag(pNode), Seq_NodeGetLValue(pNode), 
+            Seq_ObjFaninL0(pNode), Seq_ObjFaninL1(pNode), Seq_ObjFanoutL(pNode, Abc_NtkObj(pNtk, 826)), Seq_ObjFanoutL(pNode, Abc_NtkObj(pNtk, 1210)) );
+        pFanin = Abc_ObjFanin0( pNode );
+        printf( "Fanin %d.  Lag = %d. LValue = %d. Latches = (%d,%d)\n", pFanin->Id, Seq_NodeGetLag(pFanin), Seq_NodeGetLValue(pFanin),
+            Seq_ObjFaninL0(pFanin), Seq_ObjFaninL1(pFanin) );
+        pFanin = Abc_ObjFanin1( pNode );
+        printf( "Fanin %d.  Lag = %d. LValue = %d.\n", pFanin->Id, Seq_NodeGetLag(pFanin), Seq_NodeGetLValue(pFanin) );
+        Abc_ObjForEachFanout( pNode, pFanout, i )
+            printf( "Fanout %d.  Lag = %d. LValue = %d.\n", pFanout->Id, Seq_NodeGetLag(pFanout), Seq_NodeGetLValue(pFanout) );
+        Abc_ObjForEachFanout( Abc_ObjFanin0(pNode), pFanout, i )
+            printf( "Fanout %d.  Lag = %d. LValue = %d.\n", pFanout->Id, Seq_NodeGetLag(pFanout), Seq_NodeGetLValue(pFanout) );
+    }
+*/
 
     // print the result
     if ( fVerbose )
@@ -135,6 +152,7 @@ int Seq_RetimeForPeriod( Abc_Ntk_t * pNtk, int Fi, int fVerbose )
 {
     Abc_Seq_t * p = pNtk->pManFunc;
     Abc_Obj_t * pObj;
+    int nMaxSteps = 10;
     int i, c, RetValue, fChange, Counter;
     char * pReason = "";
 
@@ -149,7 +167,7 @@ int Seq_RetimeForPeriod( Abc_Ntk_t * pNtk, int Fi, int fVerbose )
 
     // update all values iteratively
     Counter = 0;
-    for ( c = 0; c < 20; c++ )
+    for ( c = 0; c < nMaxSteps; c++ )
     {
         fChange = 0;
         Abc_AigForEachAnd( pNtk, pObj, i )
@@ -185,7 +203,7 @@ int Seq_RetimeForPeriod( Abc_Ntk_t * pNtk, int Fi, int fVerbose )
         if ( fChange == 0 )
             break;
     }
-    if ( c == 20 )
+    if ( c == nMaxSteps )
     {
         RetValue = SEQ_UPDATE_FAIL;
         pReason = "(timeout)";
@@ -222,11 +240,11 @@ int Seq_RetimeNodeUpdateLValue( Abc_Obj_t * pObj, int Fi )
     int lValueNew, lValueOld, lValue0, lValue1;
     assert( !Abc_ObjIsPi(pObj) );
     assert( Abc_ObjFaninNum(pObj) > 0 );
-    lValue0 = Seq_NodeGetLValue(Abc_ObjFanin0(pObj)) - Fi * Abc_ObjFaninL0(pObj);
+    lValue0 = Seq_NodeGetLValue(Abc_ObjFanin0(pObj)) - Fi * Seq_ObjFaninL0(pObj);
     if ( Abc_ObjIsPo(pObj) )
         return (lValue0 > Fi)? SEQ_UPDATE_FAIL : SEQ_UPDATE_NO;
     if ( Abc_ObjFaninNum(pObj) == 2 )
-        lValue1 = Seq_NodeGetLValue(Abc_ObjFanin1(pObj)) - Fi * Abc_ObjFaninL1(pObj);
+        lValue1 = Seq_NodeGetLValue(Abc_ObjFanin1(pObj)) - Fi * Seq_ObjFaninL1(pObj);
     else
         lValue1 = -ABC_INFINITY;
     lValueNew = 1 + ABC_MAX( lValue0, lValue1 );

src/base/seq/seqShare.c

@@ -82,7 +82,7 @@ void Seq_NodeShareFanouts( Abc_Obj_t * pNode, Vec_Ptr_t * vNodes )
     // find the number of fanouts having latches of each type
     Abc_ObjForEachFanout( pNode, pFanout, i )  
     {
-        if ( Abc_ObjFanoutL(pNode, pFanout) == 0 )
+        if ( Seq_ObjFanoutL(pNode, pFanout) == 0 )
             continue;
         Type = Seq_NodeGetInitLast( pFanout, Abc_ObjFanoutEdgeNum(pNode, pFanout) );
         nLatches[Type]++;
@@ -119,6 +119,7 @@ void Seq_NodeShareFanouts( Abc_Obj_t * pNode, Vec_Ptr_t * vNodes )
 ***********************************************************************/
 void Seq_NodeShareOne( Abc_Obj_t * pNode, Abc_InitType_t Init, Vec_Ptr_t * vNodes )
 {
+    Vec_Int_t * vNums  = Seq_ObjLNums( pNode );
     Vec_Ptr_t * vInits = Seq_NodeLats( pNode );
     Abc_Obj_t * pFanout, * pBuffer;
     Abc_InitType_t Type, InitNew;
@@ -128,7 +129,7 @@ void Seq_NodeShareOne( Abc_Obj_t * pNode, Abc_InitType_t Init, Vec_Ptr_t * vNode
     Vec_PtrClear( vNodes );
     Abc_ObjForEachFanout( pNode, pFanout, i )
     {
-        if ( Abc_ObjFanoutL(pNode, pFanout) == 0 )
+        if ( Seq_ObjFanoutL(pNode, pFanout) == 0 )
             continue;
         Type = Seq_NodeGetInitLast( pFanout, Abc_ObjFanoutEdgeNum(pNode, pFanout) );
         if ( Type == Init )
@@ -147,6 +148,11 @@ void Seq_NodeShareOne( Abc_Obj_t * pNode, Abc_InitType_t Init, Vec_Ptr_t * vNode
     Vec_PtrGrow( vInits, 2 * pBuffer->Id + 2 );
     for ( i = Vec_PtrSize(vInits); i < 2 * (int)pBuffer->Id + 2; i++ )
         Vec_PtrPush( vInits, NULL );
+    // grow storage for numbers of latches
+    Vec_IntGrow( vNums, 2 * pBuffer->Id + 2 );
+    for ( i = Vec_IntSize(vNums); i < 2 * (int)pBuffer->Id + 2; i++ )
+        Vec_IntPush( vNums, 0 );
+    // insert the new latch
     Seq_NodeInsertFirst( pBuffer, 0, InitNew );
 
     // redirect the fanouts

src/base/seq/seqUtil.c

@@ -48,7 +48,7 @@ int Seq_ObjFanoutLMax( Abc_Obj_t * pObj )
     nLatchRes = 0;
     Abc_ObjForEachFanout( pObj, pFanout, i )
     {
-        nLatchCur = Abc_ObjFanoutL(pObj, pFanout);
+        nLatchCur = Seq_ObjFanoutL(pObj, pFanout);
         if ( nLatchRes < nLatchCur )
             nLatchRes = nLatchCur;
     }
@@ -76,7 +76,7 @@ int Seq_ObjFanoutLMin( Abc_Obj_t * pObj )
     nLatchRes = ABC_INFINITY;
     Abc_ObjForEachFanout( pObj, pFanout, i )
     {
-        nLatchCur = Abc_ObjFanoutL(pObj, pFanout);
+        nLatchCur = Seq_ObjFanoutL(pObj, pFanout);
         if ( nLatchRes > nLatchCur )
             nLatchRes = nLatchCur;
     }
@@ -100,7 +100,7 @@ int Seq_ObjFanoutLSum( Abc_Obj_t * pObj )
     Abc_Obj_t * pFanout;
     int i, nSum = 0;
     Abc_ObjForEachFanout( pObj, pFanout, i )
-        nSum += Abc_ObjFanoutL(pObj, pFanout);
+        nSum += Seq_ObjFanoutL(pObj, pFanout);
     return nSum;
 }
 
@@ -120,7 +120,7 @@ int Seq_ObjFaninLSum( Abc_Obj_t * pObj )
     Abc_Obj_t * pFanin;
     int i, nSum = 0;
     Abc_ObjForEachFanin( pObj, pFanin, i )
-        nSum += Abc_ObjFaninL(pObj, i);
+        nSum += Seq_ObjFaninL(pObj, i);
     return nSum;
 }
 
@@ -140,7 +140,7 @@ char * Seq_ObjFaninGetInitPrintable( Abc_Obj_t * pObj, int Edge )
     static char Buffer[1000];
     Abc_InitType_t Init;
     int nLatches, i;
-    nLatches = Abc_ObjFaninL( pObj, Edge );
+    nLatches = Seq_ObjFaninL( pObj, Edge );
     for ( i = 0; i < nLatches; i++ )
     {
         Init = Seq_LatInit( Seq_NodeGetLat(pObj, Edge, i) );
@@ -249,13 +249,13 @@ int Seq_NtkLatchNumMax( Abc_Ntk_t * pNtk )
     Max = 0;
     Abc_AigForEachAnd( pNtk, pObj, i )
     {
-        Cur = Abc_ObjFaninLMax( pObj );
+        Cur = Seq_ObjFaninLMax( pObj );
         if ( Max < Cur )
             Max = Cur;
     }
     Abc_NtkForEachPo( pNtk, pObj, i )
     {
-        Cur = Abc_ObjFaninL0( pObj );
+        Cur = Seq_ObjFaninL0( pObj );
         if ( Max < Cur )
             Max = Cur;
     }
@@ -301,7 +301,7 @@ void Seq_ObjLatchGetInitNums( Abc_Obj_t * pObj, int Edge, int * pInits )
 {
     Abc_InitType_t Init;
     int nLatches, i;
-    nLatches = Abc_ObjFaninL( pObj, Edge );
+    nLatches = Seq_ObjFaninL( pObj, Edge );
     for ( i = 0; i < nLatches; i++ )
     {
         Init = Seq_NodeGetInitOne( pObj, Edge, i );
@@ -338,6 +338,31 @@ void Seq_NtkLatchGetInitNums( Abc_Ntk_t * pNtk, int * pInits )
     }
 }
 
+/**Function*************************************************************
+
+  Synopsis    [Report nodes with equal fanins.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Seq_NtkLatchGetEqualFaninNum( Abc_Ntk_t * pNtk )
+{
+    Abc_Obj_t * pObj;
+    int i, Counter;
+    assert( Abc_NtkIsSeq( pNtk ) );
+    Counter = 0;
+    Abc_AigForEachAnd( pNtk, pObj, i )
+        if ( Abc_ObjFaninId0(pObj) == Abc_ObjFaninId1(pObj) )
+            Counter++;
+    if ( Counter )
+        printf( "The number of nodes with equal fanins = %d.\n", Counter );
+    return Counter;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////

src/misc/vec/vecFan.h

@@ -39,8 +39,7 @@
 typedef struct Abc_Fan_t_       Abc_Fan_t;
 struct Abc_Fan_t_ // 1 word
 {
-    unsigned         iFan    : 24;  // the ID of the object
-    unsigned         nLats   :  7;  // the number of latches (up to 127)
+    unsigned         iFan    : 31;  // the ID of the object
     unsigned         fCompl  :  1;  // the complemented attribute
 };
 

src/misc/vec/vecInt.h

@@ -307,6 +307,23 @@ static inline void Vec_IntWriteEntry( Vec_Int_t * p, int i, int Entry )
   SeeAlso     []
 
 ***********************************************************************/
+static inline void Vec_IntAddToEntry( Vec_Int_t * p, int i, int Addition )
+{
+    assert( i >= 0 && i < p->nSize );
+    p->pArray[i] += Addition;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
 static inline int Vec_IntEntryLast( Vec_Int_t * p )
 {
     return p->pArray[p->nSize-1];