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/**CFile****************************************************************
FileName [abcUtils.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Utilities working sequential AIGs.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcUtils.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Returns the latch number of the fanout.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_ObjFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout )
{
assert( Abc_NtkIsSeq(pObj->pNtk) );
if ( Abc_ObjFaninId0(pFanout) == (int)pObj->Id )
return Abc_ObjFaninL0(pFanout);
else if ( Abc_ObjFaninId1(pFanout) == (int)pObj->Id )
return Abc_ObjFaninL1(pFanout);
else
assert( 0 );
return 0;
}
/**Function*************************************************************
Synopsis [Sets the latch number of the fanout.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ObjSetFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout, int nLats )
{
assert( Abc_NtkIsSeq(pObj->pNtk) );
if ( Abc_ObjFaninId0(pFanout) == (int)pObj->Id )
Abc_ObjSetFaninL0(pFanout, nLats);
else if ( Abc_ObjFaninId1(pFanout) == (int)pObj->Id )
Abc_ObjSetFaninL1(pFanout, nLats);
else
assert( 0 );
}
/**Function*************************************************************
Synopsis [Adds to the latch number of the fanout.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ObjAddFanoutL( Abc_Obj_t * pObj, Abc_Obj_t * pFanout, int nLats )
{
assert( Abc_NtkIsSeq(pObj->pNtk) );
if ( Abc_ObjFaninId0(pFanout) == (int)pObj->Id )
Abc_ObjAddFaninL0(pFanout, nLats);
else if ( Abc_ObjFaninId1(pFanout) == (int)pObj->Id )
Abc_ObjAddFaninL1(pFanout, nLats);
else
assert( 0 );
}
/**Function*************************************************************
Synopsis [Returns the latch number of the fanout.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_ObjFanoutLMax( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, nLatchCur, nLatchRes;
nLatchRes = 0;
Abc_ObjForEachFanout( pObj, pFanout, i )
{
nLatchCur = Abc_ObjFanoutL(pObj, pFanout);
if ( nLatchRes < nLatchCur )
nLatchRes = nLatchCur;
}
assert( nLatchRes >= 0 );
return nLatchRes;
}
/**Function*************************************************************
Synopsis [Returns the latch number of the fanout.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_ObjFanoutLMin( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, nLatchCur, nLatchRes;
nLatchRes = ABC_INFINITY;
Abc_ObjForEachFanout( pObj, pFanout, i )
{
nLatchCur = Abc_ObjFanoutL(pObj, pFanout);
if ( nLatchRes > nLatchCur )
nLatchRes = nLatchCur;
}
assert( nLatchRes < ABC_INFINITY );
return nLatchRes;
}
/**Function*************************************************************
Synopsis [Returns the sum of latches on the fanout edges.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_ObjFanoutLSum( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, nSum = 0;
Abc_ObjForEachFanout( pObj, pFanout, i )
nSum += Abc_ObjFanoutL(pObj, pFanout);
return nSum;
}
/**Function*************************************************************
Synopsis [Returns the sum of latches on the fanin edges.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_ObjFaninLSum( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanin;
int i, nSum = 0;
Abc_ObjForEachFanin( pObj, pFanin, i )
nSum += Abc_ObjFaninL(pObj, i);
return nSum;
}
/**Function*************************************************************
Synopsis [Counters the number of latches in the sequential AIG.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkSeqLatchNum( Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pObj;
int i, Counter;
assert( Abc_NtkIsSeq( pNtk ) );
Counter = 0;
Abc_NtkForEachNode( pNtk, pObj, i )
Counter += Abc_ObjFaninLSum( pObj );
Abc_NtkForEachPo( pNtk, pObj, i )
Counter += Abc_ObjFaninLSum( pObj );
return Counter;
}
/**Function*************************************************************
Synopsis [Counters the number of latches in the sequential AIG.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkSeqLatchNumShared( Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pObj;
int i, Counter;
assert( Abc_NtkIsSeq( pNtk ) );
Counter = 0;
Abc_NtkForEachPi( pNtk, pObj, i )
Counter += Abc_ObjFanoutLMax( pObj );
Abc_NtkForEachNode( pNtk, pObj, i )
Counter += Abc_ObjFanoutLMax( pObj );
return Counter;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
