1 files changed, 49 insertions, 0 deletions
diff --git a/src/aig/gia/giaDup.c b/src/aig/gia/giaDup.c
index d1a115a5..735bd566 100644
--- a/src/aig/gia/giaDup.c
+++ b/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 []