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/**CFile****************************************************************
FileName [cswCore.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Cut sweeping.]
Synopsis []
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - July 11, 2007.]
Revision [$Id: cswCore.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $]
***********************************************************************/
#include "cswInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Csw_Sweep( Aig_Man_t * pAig, int nCutsMax, int nLeafMax, int fVerbose )
{
Csw_Man_t * p;
Aig_Man_t * pRes;
Aig_Obj_t * pObj, * pObjNew, * pObjRes;
int i;
clock_t clk;
clk = clock();
// start the manager
p = Csw_ManStart( pAig, nCutsMax, nLeafMax, fVerbose );
// set elementary cuts at the PIs
Aig_ManForEachCi( p->pManRes, pObj, i )
{
Csw_ObjPrepareCuts( p, pObj, 1 );
Csw_ObjAddRefs( p, pObj, Aig_ManCi(p->pManAig,i)->nRefs );
}
// process the nodes
Aig_ManForEachNode( pAig, pObj, i )
{
// create the new node
pObjNew = Aig_And( p->pManRes, Csw_ObjChild0Equiv(p, pObj), Csw_ObjChild1Equiv(p, pObj) );
// check if this node can be represented using another node
// pObjRes = Csw_ObjSweep( p, Aig_Regular(pObjNew), pObj->nRefs > 1 );
// pObjRes = Aig_NotCond( pObjRes, Aig_IsComplement(pObjNew) );
// try recursively if resubsitution is used
do {
pObjRes = Csw_ObjSweep( p, Aig_Regular(pObjNew), pObj->nRefs > 1 );
pObjRes = Aig_NotCond( pObjRes, Aig_IsComplement(pObjNew) );
pObjNew = pObjRes;
} while ( Csw_ObjCuts(p, Aig_Regular(pObjNew)) == NULL && !Aig_ObjIsConst1(Aig_Regular(pObjNew)) );
// save the resulting node
Csw_ObjSetEquiv( p, pObj, pObjRes );
// add to the reference counter
Csw_ObjAddRefs( p, Aig_Regular(pObjRes), pObj->nRefs );
}
// add the POs
Aig_ManForEachCo( pAig, pObj, i )
Aig_ObjCreateCo( p->pManRes, Csw_ObjChild0Equiv(p, pObj) );
// remove dangling nodes
Aig_ManCleanup( p->pManRes );
// return the resulting manager
p->timeTotal = clock() - clk;
p->timeOther = p->timeTotal - p->timeCuts - p->timeHash;
pRes = p->pManRes;
Csw_ManStop( p );
return pRes;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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