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Diffstat (limited to 'src/opt/csw/cswCore.c')
-rw-r--r-- | src/opt/csw/cswCore.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/opt/csw/cswCore.c b/src/opt/csw/cswCore.c new file mode 100644 index 00000000..e1bdca00 --- /dev/null +++ b/src/opt/csw/cswCore.c @@ -0,0 +1,99 @@ +/**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, clk; +clk = clock(); + // start the manager + p = Csw_ManStart( pAig, nCutsMax, nLeafMax, fVerbose ); + // set elementary cuts at the PIs + Aig_ManForEachPi( p->pManRes, pObj, i ) + { + Csw_ObjPrepareCuts( p, pObj, 1 ); + Csw_ObjAddRefs( p, pObj, Aig_ManPi(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_ManForEachPo( pAig, pObj, i ) + Aig_ObjCreatePo( 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 + |