2017-01-02 10:29:10 +01:00
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/**CFile****************************************************************
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FileName [sbdPath.c]
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SystemName [ABC: Logic synthesis and verification system.]
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PackageName [SAT-based optimization using internal don't-cares.]
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Synopsis [Critical path.]
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Author [Alan Mishchenko]
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Affiliation [UC Berkeley]
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Date [Ver. 1.0. Started - June 20, 2005.]
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Revision [$Id: sbdPath.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
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***********************************************************************/
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#include "sbdInt.h"
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ABC_NAMESPACE_IMPL_START
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////////////////////////////////////////////////////////////////////////
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/// DECLARATIONS ///
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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/// FUNCTION DEFINITIONS ///
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////////////////////////////////////////////////////////////////////////
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/**Function*************************************************************
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Synopsis []
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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int Sbc_ManAddInternalToPath_rec( Gia_Man_t * p, int iObj, Vec_Bit_t * vPath )
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{
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Gia_Obj_t * pObj;
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int k, iFan, Value = 0;
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if ( Gia_ObjIsTravIdCurrentId(p, iObj) )
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return Vec_BitEntry(vPath, iObj);
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Gia_ObjSetTravIdCurrentId(p, iObj);
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pObj = Gia_ManObj( p, iObj );
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if ( Gia_ObjIsCi(pObj) )
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return 0;
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assert( Gia_ObjIsAnd(pObj) );
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Gia_LutForEachFanin( p, iObj, iFan, k )
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Value |= Sbc_ManAddInternalToPath_rec( p, iFan, vPath );
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if ( Value )
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Vec_BitWriteEntry( vPath, iObj, 1 );
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return Value;
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}
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void Sbc_ManAddInternalToPath( Gia_Man_t * p, Vec_Bit_t * vPath )
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{
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int k, iFan, iObj;
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2017-01-02 10:29:10 +01:00
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Gia_ManForEachLut( p, iObj )
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{
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if ( !Vec_BitEntry(vPath, iObj) )
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continue;
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Gia_ManIncrementTravId( p );
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Gia_LutForEachFanin( p, iObj, iFan, k )
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Gia_ObjSetTravIdCurrentId(p, iFan);
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2017-01-02 10:29:10 +01:00
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Sbc_ManAddInternalToPath_rec( p, iObj, vPath );
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}
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}
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/**Function*************************************************************
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Synopsis []
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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void Sbc_ManCriticalPath_rec( Gia_Man_t * p, int * pLevels, int iObj, int LevelFan, Vec_Bit_t * vPath )
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{
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Gia_Obj_t * pObj; int k, iFan;
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if ( Gia_ObjIsTravIdCurrentId(p, iObj) )
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return;
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Gia_ObjSetTravIdCurrentId(p, iObj);
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pObj = Gia_ManObj( p, iObj );
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if ( Gia_ObjIsCi(pObj) )
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return;
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assert( Gia_ObjIsAnd(pObj) );
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Vec_BitWriteEntry( vPath, iObj, 1 );
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Gia_LutForEachFanin( p, iObj, iFan, k )
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if ( pLevels[iFan] == LevelFan )
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Sbc_ManCriticalPath_rec( p, pLevels, iFan, LevelFan-1, vPath );
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}
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Vec_Bit_t * Sbc_ManCriticalPath( Gia_Man_t * p )
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{
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int * pLevels = NULL, k, iDriver;
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int nLevels = p->pManTime ? Gia_ManLutLevelWithBoxes(p) : Gia_ManLutLevel(p, &pLevels);
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Vec_Bit_t * vPath = Vec_BitStart( Gia_ManObjNum(p) );
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if ( p->pManTime )
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pLevels = Vec_IntArray( p->vLevels );
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Gia_ManIncrementTravId( p );
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Gia_ManForEachCoDriverId( p, iDriver, k )
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if ( (pLevels[iDriver] == nLevels) && iDriver )
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Sbc_ManCriticalPath_rec( p, pLevels, iDriver, nLevels-1, vPath );
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if ( !p->pManTime )
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ABC_FREE( pLevels );
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Sbc_ManAddInternalToPath( p, vPath );
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return vPath;
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}
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////////////////////////////////////////////////////////////////////////
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/// END OF FILE ///
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////////////////////////////////////////////////////////////////////////
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ABC_NAMESPACE_IMPL_END
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