Updates to delay optimization project.

1 files changed, 124 insertions, 0 deletions

diff --git a/src/opt/sbd/sbdPath.c b/src/opt/sbd/sbdPath.c
new file mode 100644
index 00000000..417cb407
--- /dev/null
+++ b/src/opt/sbd/sbdPath.c
@@ -0,0 +1,124 @@
+/**CFile****************************************************************
+
+  FileName    [sbdPath.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [SAT-based optimization using internal don't-cares.]
+
+  Synopsis    [Critical path.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: sbdPath.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "sbdInt.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Sbc_ManAddInternalToPath_rec( Gia_Man_t * p, int iObj, Vec_Bit_t * vPath )
+{
+    Gia_Obj_t * pObj; 
+    int k, iFan, Value = 0;
+    if ( Gia_ObjIsTravIdCurrentId(p, iObj) )
+        return Vec_BitEntry(vPath, iObj);
+    Gia_ObjSetTravIdCurrentId(p, iObj);
+    pObj = Gia_ManObj( p, iObj );
+    if ( Gia_ObjIsCi(pObj) )
+        return 0;
+    assert( Gia_ObjIsAnd(pObj) );
+    Gia_LutForEachFanin( p, iObj, iFan, k )
+        Value |= Sbc_ManAddInternalToPath_rec( p, iFan, vPath );
+    if ( Value )
+        Vec_BitWriteEntry( vPath, iObj, 1 );
+    return Value;
+}
+void Sbc_ManAddInternalToPath( Gia_Man_t * p, Vec_Bit_t * vPath )
+{
+    int iObj;
+    Gia_ManForEachLut( p, iObj )
+    {
+        if ( !Vec_BitEntry(vPath, iObj) )
+            continue;
+        Gia_ManIncrementTravId( p );
+        Sbc_ManAddInternalToPath_rec( p, iObj, vPath );
+    }
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Sbc_ManCriticalPath_rec( Gia_Man_t * p, int * pLevels, int iObj, int LevelFan, Vec_Bit_t * vPath )
+{
+    Gia_Obj_t * pObj; int k, iFan;
+    if ( Gia_ObjIsTravIdCurrentId(p, iObj) )
+        return;
+    Gia_ObjSetTravIdCurrentId(p, iObj);
+    pObj = Gia_ManObj( p, iObj );
+    if ( Gia_ObjIsCi(pObj) )
+        return;
+    assert( Gia_ObjIsAnd(pObj) );
+    Vec_BitWriteEntry( vPath, iObj, 1 );
+    Gia_LutForEachFanin( p, iObj, iFan, k )
+        if ( pLevels[iFan] == LevelFan )
+            Sbc_ManCriticalPath_rec( p, pLevels, iFan, LevelFan-1, vPath );
+}
+Vec_Bit_t * Sbc_ManCriticalPath( Gia_Man_t * p )
+{
+    int * pLevels = NULL, k, iDriver;
+    int nLevels = p->pManTime ? Gia_ManLutLevelWithBoxes(p) : Gia_ManLutLevel(p, &pLevels);
+    Vec_Bit_t * vPath = Vec_BitStart( Gia_ManObjNum(p) );
+    if ( p->pManTime )
+        pLevels = Vec_IntArray( p->vLevels );
+    Gia_ManIncrementTravId( p );
+    Gia_ManForEachCoDriverId( p, iDriver, k )
+        if ( pLevels[iDriver] == nLevels && iDriver )
+            Sbc_ManCriticalPath_rec( p, pLevels, iDriver, nLevels-1, vPath );
+    if ( !p->pManTime )
+        ABC_FREE( pLevels );
+    Sbc_ManAddInternalToPath( p, vPath );
+    return vPath;
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+