Version abc80330

1 files changed, 112 insertions, 0 deletions

diff --git a/src/aig/mfx/mfxWin.c b/src/aig/mfx/mfxWin.c
new file mode 100644
index 00000000..e84a9b90
--- /dev/null
+++ b/src/aig/mfx/mfxWin.c
@@ -0,0 +1,112 @@
+/**CFile****************************************************************
+
+  FileName    [mfxWin.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [The good old minimization with complete don't-cares.]
+
+  Synopsis    [Procedures to compute windows stretching to the PIs.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: mfxWin.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "mfxInt.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Returns 1 if the node should be a root.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Mfx_ComputeRootsCheck( Nwk_Obj_t * pNode, int nLevelMax, int nFanoutLimit )
+{
+    Nwk_Obj_t * pFanout;
+    int i;
+    // the node is the root if one of the following is true:
+    // (1) the node has more than fanouts than the limit
+    if ( Nwk_ObjFanoutNum(pNode) > nFanoutLimit )
+        return 1;
+    // (2) the node has CO fanouts
+    // (3) the node has fanouts above the cutoff level
+    Nwk_ObjForEachFanout( pNode, pFanout, i )
+        if ( Nwk_ObjIsCo(pFanout) || pFanout->Level > nLevelMax )
+            return 1;
+    return 0;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Recursively collects the root candidates.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Mfx_ComputeRoots_rec( Nwk_Obj_t * pNode, int nLevelMax, int nFanoutLimit, Vec_Ptr_t * vRoots )
+{
+    Nwk_Obj_t * pFanout;
+    int i;
+    assert( Nwk_ObjIsNode(pNode) );
+    if ( Nwk_ObjIsTravIdCurrent(pNode) )
+        return;
+    Nwk_ObjSetTravIdCurrent( pNode );
+    // check if the node should be the root
+    if ( Mfx_ComputeRootsCheck( pNode, nLevelMax, nFanoutLimit ) )
+        Vec_PtrPush( vRoots, pNode );
+    else // if not, explore its fanouts
+        Nwk_ObjForEachFanout( pNode, pFanout, i )
+            Mfx_ComputeRoots_rec( pFanout, nLevelMax, nFanoutLimit, vRoots );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Recursively collects the root candidates.]
+
+  Description [Returns 1 if the only root is this node.]
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Ptr_t * Mfx_ComputeRoots( Nwk_Obj_t * pNode, int nWinTfoMax, int nFanoutLimit )
+{
+    Vec_Ptr_t * vRoots;
+    vRoots = Vec_PtrAlloc( 10 );
+    Nwk_ManIncrementTravId( pNode->pMan );
+    Mfx_ComputeRoots_rec( pNode, pNode->Level + nWinTfoMax, nFanoutLimit, vRoots );
+    assert( Vec_PtrSize(vRoots) > 0 );
+//    if ( Vec_PtrSize(vRoots) == 1 && Vec_PtrEntry(vRoots, 0) == pNode )
+//        return 0;
+    return vRoots;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+