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/**CFile****************************************************************
FileName [ntlFraig.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Netlist representation.]
Synopsis [Performing fraiging with white-boxes.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: ntlFraig.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "ntl.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Returns AIG with WB after fraiging.]
Description [pAig points to the nodes of pNew derived using it.
pNew points to the nodes of pAigCol derived using it.]
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Obj_t ** Ntl_ManFraigDeriveClasses( Aig_Man_t * pAig, Ntl_Man_t * pNew, Aig_Man_t * pAigCol )
{
Ntl_Net_t * pNet;
Aig_Obj_t ** pReprs = NULL, ** pMapBack = NULL;
Aig_Obj_t * pObj, * pObjCol, * pObjColRepr, * pCorresp;
int i;
// map the AIG managers
Aig_ManForEachObj( pAig, pObj, i )
if ( Aig_ObjIsConst1(pObj) )
pObj->pData = Aig_ManConst1(pAigCol);
else if ( !Aig_ObjIsPo(pObj) )
{
pNet = pObj->pData;
pObjCol = Aig_Regular(pNet->pCopy);
pObj->pData = pObjCol;
}
// create mapping from the collapsed manager into the original manager
pMapBack = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(pAigCol) );
memset( pMapBack, 0, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(pAigCol) );
Aig_ManForEachObj( pAig, pObj, i )
{
if ( Aig_ObjIsPo(pObj) )
continue;
pObjCol = pObj->pData;
if ( pMapBack[pObjCol->Id] == NULL )
pMapBack[pObjCol->Id] = pObj;
}
// create the equivalence classes for the original manager
pReprs = ALLOC( Aig_Obj_t *, Aig_ManObjNumMax(pAig) );
memset( pReprs, 0, sizeof(Aig_Obj_t *) * Aig_ManObjNumMax(pAig) );
Aig_ManForEachObj( pAig, pObj, i )
{
if ( Aig_ObjIsPo(pObj) )
continue;
// get the collapsed node
pObjCol = pObj->pData;
// get the representative of the collapsed node
pObjColRepr = pAigCol->pReprs[pObjCol->Id];
if ( pObjColRepr == NULL )
pObjColRepr = pObjCol;
// get the corresponding original node
pCorresp = pMapBack[pObjColRepr->Id];
if ( pCorresp == NULL || pCorresp == pObj )
continue;
// set the representative
if ( pCorresp->Id < pObj->Id )
pReprs[pObj->Id] = pCorresp;
else
pReprs[pCorresp->Id] = pObj;
}
free( pMapBack );
return pReprs;
}
/**Function*************************************************************
Synopsis [Returns AIG with WB after fraiging.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Ntl_ManFraig( Ntl_Man_t * p, Aig_Man_t * pAig, int nPartSize, int nConfLimit, int nLevelMax, int fVerbose )
{
Ntl_Man_t * pNew;
Aig_Man_t * pAigCol, * pTemp;
assert( pAig->pReprs == NULL );
// create a new netlist whose nodes are in 1-to-1 relationship with AIG
pNew = Ntl_ManDup( p );
if ( !Ntl_ManInsertAig( pNew, pAig ) )
{
Ntl_ManFree( pNew );
printf( "Ntk_ManFraig(): Inserting AIG has failed.\n" );
return NULL;
}
// collapse the AIG
pAigCol = Ntl_ManCollapse( pNew );
// perform fraiging for the given design
if ( nPartSize == 0 )
nPartSize = Aig_ManPoNum(pAigCol);
pTemp = Aig_ManFraigPartitioned( pAigCol, nPartSize, nConfLimit, nLevelMax, fVerbose );
Aig_ManStop( pTemp );
// transfer equivalence classes to the original AIG
pAig->pReprs = Ntl_ManFraigDeriveClasses( pAig, pNew, pAigCol );
pAig->nReprsAlloc = Aig_ManObjNumMax(pAig);
// cleanup
Aig_ManStop( pAigCol );
Ntl_ManFree( pNew );
// derive the new AIG
pTemp = Aig_ManDupRepresDfs( pAig );
// duplicate the timing manager
if ( pAig->pManTime )
pTemp->pManTime = Tim_ManDup( pAig->pManTime, 0 );
// reset levels
Aig_ManChoiceLevel( pTemp );
return pTemp;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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