New command &cycle, which is faster than 'cycle'.

src/aig/gia/gia.h

@@ -813,6 +813,7 @@ extern Gia_Man_t *         Gia_ManDupOrderDfsReverse( Gia_Man_t * p );
 extern Gia_Man_t *         Gia_ManDupOutputGroup( Gia_Man_t * p, int iOutStart, int iOutStop );
 extern Gia_Man_t *         Gia_ManDupOrderAiger( Gia_Man_t * p );
 extern Gia_Man_t *         Gia_ManDupFlip( Gia_Man_t * p, int * pInitState );
+extern Gia_Man_t *         Gia_ManDupCycled( Gia_Man_t * pAig, int nFrames );
 extern Gia_Man_t *         Gia_ManDup( Gia_Man_t * p );  
 extern Gia_Man_t *         Gia_ManDupPerm( Gia_Man_t * p, Vec_Int_t * vPiPerm );
 extern void                Gia_ManDupAppend( Gia_Man_t * p, Gia_Man_t * pTwo );

src/aig/gia/giaDup.c

@@ -395,6 +395,55 @@ Gia_Man_t * Gia_ManDupFlip( Gia_Man_t * p, int * pInitState )
 
 /**Function*************************************************************
 
+  Synopsis    [Cycles AIG using random input.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_ManCycle( Gia_Man_t * p, int nFrames )
+{
+    Gia_Obj_t * pObj, * pObjRi, * pObjRo;
+    int i, k;
+//    Gia_ManRandom( 1 );
+    // assign random primary inputs
+    Gia_ManForEachPi( p, pObj, k )
+        pObj->fMark0 = (1 & Gia_ManRandom(0));
+    // iterate for the given number of frames
+    for ( i = 0; i < nFrames; i++ )
+    {
+        Gia_ManForEachAnd( p, pObj, k )
+            pObj->fMark0 = (Gia_ObjFanin0(pObj)->fMark0 ^ Gia_ObjFaninC0(pObj)) & 
+                           (Gia_ObjFanin1(pObj)->fMark0 ^ Gia_ObjFaninC1(pObj));
+        Gia_ManForEachCo( p, pObj, k )
+            pObj->fMark0 = Gia_ObjFanin0(pObj)->fMark0 ^ Gia_ObjFaninC0(pObj);
+        Gia_ManForEachRiRo( p, pObjRi, pObjRo, k )
+            pObjRo->fMark0 = pObjRi->fMark0;
+    }
+}
+Gia_Man_t * Gia_ManDupCycled( Gia_Man_t * p, int nFrames )
+{
+    Gia_Man_t * pNew;
+    Vec_Int_t * vInits;
+    Gia_Obj_t * pObj;
+    int i;
+    Gia_ManCleanMark0(p);
+    Gia_ManCycle( p, nFrames );
+    vInits = Vec_IntAlloc( Gia_ManRegNum(p) );
+    Gia_ManForEachRo( p, pObj, i )
+        Vec_IntPush( vInits, pObj->fMark0 );
+    pNew = Gia_ManDupFlip( p, Vec_IntArray(vInits) );
+    Vec_IntFree( vInits );
+    Gia_ManCleanMark0(p);
+    return pNew;
+}
+
+
+/**Function*************************************************************
+
   Synopsis    [Duplicates AIG without any changes.]
 
   Description []

src/base/abci/abc.c

@@ -371,6 +371,7 @@ static int Abc_CommandAbc9ReachY             ( Abc_Frame_t * pAbc, int argc, cha
 static int Abc_CommandAbc9Undo               ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9Iso                ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9CexInfo            ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int Abc_CommandAbc9Cycle              ( Abc_Frame_t * pAbc, int argc, char ** argv );
 //static int Abc_CommandAbc9CexCut             ( Abc_Frame_t * pAbc, int argc, char ** argv );
 //static int Abc_CommandAbc9CexMerge           ( Abc_Frame_t * pAbc, int argc, char ** argv );
 //static int Abc_CommandAbc9CexMin             ( Abc_Frame_t * pAbc, int argc, char ** argv );
@@ -834,6 +835,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
     Cmd_CommandAdd( pAbc, "ABC9",         "&undo",         Abc_CommandAbc9Undo,         0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&iso",          Abc_CommandAbc9Iso,          0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&cexinfo",      Abc_CommandAbc9CexInfo,      0 );
+    Cmd_CommandAdd( pAbc, "ABC9",         "&cycle",        Abc_CommandAbc9Cycle,        0 );
 //    Cmd_CommandAdd( pAbc, "ABC9",         "&cexcut",       Abc_CommandAbc9CexCut,       0 );
 //    Cmd_CommandAdd( pAbc, "ABC9",         "&cexmerge",     Abc_CommandAbc9CexMerge,     0 );
 //    Cmd_CommandAdd( pAbc, "ABC9",         "&cexmin",       Abc_CommandAbc9CexMin,       0 );
@@ -29408,6 +29410,65 @@ usage:
     return 1;
 }
 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Abc_CommandAbc9Cycle( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Gia_Man_t * pTemp;
+    int c, nFrames = 10, fVerbose = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "Fvh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'F':
+            if ( globalUtilOptind >= argc )
+            {
+                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
+                goto usage;
+            }
+            nFrames = atoi(argv[globalUtilOptind]);
+            globalUtilOptind++;
+            if ( nFrames < 0 )
+                goto usage;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( pAbc->pGia == NULL )
+    {
+        Abc_Print( -1, "Abc_CommandAbc9Cycle(): There is no AIG.\n" );
+        return 1;
+    }
+    pTemp = Gia_ManDupCycled( pAbc->pGia, nFrames );
+    Abc_CommandUpdate9( pAbc, pTemp );
+    return 0;
+
+usage:
+    Abc_Print( -2, "usage: &cycle [-F num] [-vh]\n" );
+    Abc_Print( -2, "\t         cycles sequential circuit for the given number of timeframes\n" );
+    Abc_Print( -2, "\t         to derive a new initial state (which may be on the envelope)\n" );
+    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", nFrames );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
 
 
 /**Function*************************************************************