1 files changed, 115 insertions, 0 deletions
diff --git a/src/proof/int/intFrames.c b/src/proof/int/intFrames.c
new file mode 100644
index 00000000..0fbab6cb
--- /dev/null
+++ b/src/proof/int/intFrames.c
@@ -0,0 +1,115 @@
+/**CFile****************************************************************
+
+  FileName    [intFrames.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Interpolation engine.]
+
+  Synopsis    [Sequential AIG unrolling for interpolation.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 24, 2008.]
+
+  Revision    [$Id: intFrames.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "intInt.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Create timeframes of the manager for interpolation.]
+
+  Description [The resulting manager is combinational. The primary inputs
+  corresponding to register outputs are ordered first. The only POs of the 
+  manager is the property output of the last timeframe.]
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Aig_Man_t * Inter_ManFramesInter( Aig_Man_t * pAig, int nFrames, int fAddRegOuts )
+{
+    Aig_Man_t * pFrames;
+    Aig_Obj_t * pObj, * pObjLi, * pObjLo;
+    int i, f;
+    assert( Saig_ManRegNum(pAig) > 0 );
+    assert( Saig_ManPoNum(pAig)-Saig_ManConstrNum(pAig) == 1 );
+    pFrames = Aig_ManStart( Aig_ManNodeNum(pAig) * nFrames );
+    // map the constant node
+    Aig_ManConst1(pAig)->pData = Aig_ManConst1( pFrames );
+    // create variables for register outputs
+    if ( fAddRegOuts )
+    {
+        Saig_ManForEachLo( pAig, pObj, i )
+            pObj->pData = Aig_ManConst0( pFrames );
+    }
+    else
+    {
+        Saig_ManForEachLo( pAig, pObj, i )
+            pObj->pData = Aig_ObjCreatePi( pFrames );
+    }
+    // add timeframes
+    for ( f = 0; f < nFrames; f++ )
+    {
+        // create PI nodes for this frame
+        Saig_ManForEachPi( pAig, pObj, i )
+            pObj->pData = Aig_ObjCreatePi( pFrames );
+        // add internal nodes of this frame
+        Aig_ManForEachNode( pAig, pObj, i )
+            pObj->pData = Aig_And( pFrames, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) );
+        // add outputs for constraints
+        Saig_ManForEachPo( pAig, pObj, i )
+        {
+            if ( i < Saig_ManPoNum(pAig)-Saig_ManConstrNum(pAig) )
+                continue;
+            Aig_ObjCreatePo( pFrames, Aig_Not( Aig_ObjChild0Copy(pObj) ) );
+        }
+        if ( f == nFrames - 1 )
+            break;
+        // save register inputs
+        Saig_ManForEachLi( pAig, pObj, i )
+            pObj->pData = Aig_ObjChild0Copy(pObj);
+        // transfer to register outputs
+        Saig_ManForEachLiLo(  pAig, pObjLi, pObjLo, i )
+            pObjLo->pData = pObjLi->pData;
+    }
+    // create POs for each register output
+    if ( fAddRegOuts )
+    {
+        Saig_ManForEachLi( pAig, pObj, i )
+            Aig_ObjCreatePo( pFrames, Aig_ObjChild0Copy(pObj) );
+    }
+    // create the only PO of the manager
+    else
+    {
+        pObj = Aig_ManPo( pAig, 0 );
+        Aig_ObjCreatePo( pFrames, Aig_ObjChild0Copy(pObj) );
+    }
+    Aig_ManCleanup( pFrames );
+    return pFrames;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+