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/**CFile****************************************************************
FileName [acecBo.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [CEC for arithmetic circuits.]
Synopsis [Core procedures.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: acecBo.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "acecInt.h"
#include "misc/vec/vecWec.h"
#include "misc/extra/extra.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Acec_DetectBoothXorMux( Gia_Man_t * p, Gia_Obj_t * pMux, Gia_Obj_t * pXor, int pIns[3] )
{
Gia_Obj_t * pFan0, * pFan1;
Gia_Obj_t * pDat0, * pDat1, * pCtrl;
if ( !Gia_ObjIsMuxType(pMux) || !Gia_ObjIsMuxType(pXor) )
return 0;
if ( !Gia_ObjRecognizeExor( pXor, &pFan0, &pFan1 ) )
return 0;
pFan0 = Gia_Regular(pFan0);
pFan1 = Gia_Regular(pFan1);
if ( Gia_ObjId(p, pFan0) > Gia_ObjId(p, pFan1) )
ABC_SWAP( Gia_Obj_t *, pFan0, pFan1 );
if ( !(pCtrl = Gia_ObjRecognizeMux( pMux, &pDat0, &pDat1 )) )
return 0;
pDat0 = Gia_Regular(pDat0);
pDat1 = Gia_Regular(pDat1);
pCtrl = Gia_Regular(pCtrl);
if ( !Gia_ObjIsAnd(pDat0) || !Gia_ObjIsAnd(pDat1) )
return 0;
if ( Gia_ObjFaninId0p(p, pDat0) != Gia_ObjFaninId0p(p, pDat1) ||
Gia_ObjFaninId1p(p, pDat0) != Gia_ObjFaninId1p(p, pDat1) )
return 0;
if ( Gia_ObjFaninId0p(p, pDat0) != Gia_ObjId(p, pFan0) ||
Gia_ObjFaninId1p(p, pDat0) != Gia_ObjId(p, pFan1) )
return 0;
pIns[0] = Gia_ObjId(p, pFan0);
pIns[1] = Gia_ObjId(p, pFan1);
pIns[2] = Gia_ObjId(p, pCtrl);
return 1;
}
int Acec_DetectBoothXorFanin( Gia_Man_t * p, Gia_Obj_t * pObj, int pIns[5] )
{
Gia_Obj_t * pFan0, * pFan1;
//int Id = Gia_ObjId(p, pObj);
if ( !Gia_ObjIsAnd(pObj) )
return 0;
if ( !Gia_ObjFaninC0(pObj) || !Gia_ObjFaninC1(pObj) )
return 0;
pFan0 = Gia_ObjFanin0(pObj);
pFan1 = Gia_ObjFanin1(pObj);
if ( !Gia_ObjIsAnd(pFan0) || !Gia_ObjIsAnd(pFan1) )
return 0;
if ( Acec_DetectBoothXorMux(p, Gia_ObjFanin0(pFan0), Gia_ObjFanin0(pFan1), pIns) )
{
pIns[3] = Gia_ObjId(p, Gia_ObjFanin1(pFan0));
pIns[4] = Gia_ObjId(p, Gia_ObjFanin1(pFan1));
return 1;
}
if ( Acec_DetectBoothXorMux(p, Gia_ObjFanin0(pFan0), Gia_ObjFanin1(pFan1), pIns) )
{
pIns[3] = Gia_ObjId(p, Gia_ObjFanin1(pFan0));
pIns[4] = Gia_ObjId(p, Gia_ObjFanin0(pFan1));
return 1;
}
if ( Acec_DetectBoothXorMux(p, Gia_ObjFanin1(pFan0), Gia_ObjFanin0(pFan1), pIns) )
{
pIns[3] = Gia_ObjId(p, Gia_ObjFanin0(pFan0));
pIns[4] = Gia_ObjId(p, Gia_ObjFanin1(pFan1));
return 1;
}
if ( Acec_DetectBoothXorMux(p, Gia_ObjFanin1(pFan0), Gia_ObjFanin1(pFan1), pIns) )
{
pIns[3] = Gia_ObjId(p, Gia_ObjFanin0(pFan0));
pIns[4] = Gia_ObjId(p, Gia_ObjFanin0(pFan1));
return 1;
}
return 0;
}
int Acec_DetectBoothOne( Gia_Man_t * p, Gia_Obj_t * pObj, int pIns[5] )
{
Gia_Obj_t * pFan0, * pFan1;
if ( !Gia_ObjRecognizeExor( pObj, &pFan0, &pFan1 ) )
return 0;
pFan0 = Gia_Regular(pFan0);
pFan1 = Gia_Regular(pFan1);
if ( Acec_DetectBoothXorFanin( p, pFan0, pIns ) && pIns[2] == Gia_ObjId(p, pFan1) )
return 1;
if ( Acec_DetectBoothXorFanin( p, pFan1, pIns ) && pIns[2] == Gia_ObjId(p, pFan0) )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Acec_DetectBoothTwoXor( Gia_Man_t * p, Gia_Obj_t * pObj, int pIns[5] )
{
Gia_Obj_t * pFan0, * pFan1;
if ( !Gia_ObjIsAnd(pObj) )
return 0;
if ( Gia_ObjRecognizeExor( Gia_ObjFanin0(pObj), &pFan0, &pFan1 ) )
{
pIns[0] = Gia_ObjId(p, Gia_Regular(pFan0));
pIns[1] = Gia_ObjId(p, Gia_Regular(pFan1));
pIns[2] = -1;
pIns[3] = 0;
pIns[4] = Gia_ObjId(p, Gia_ObjFanin1(pObj));
return 1;
}
if ( Gia_ObjRecognizeExor( Gia_ObjFanin1(pObj), &pFan0, &pFan1 ) )
{
pIns[0] = Gia_ObjId(p, Gia_Regular(pFan0));
pIns[1] = Gia_ObjId(p, Gia_Regular(pFan1));
pIns[2] = -1;
pIns[3] = 0;
pIns[4] = Gia_ObjId(p, Gia_ObjFanin0(pObj));
return 1;
}
return 0;
}
int Acec_DetectBoothTwo( Gia_Man_t * p, Gia_Obj_t * pObj, int pIns[5] )
{
Gia_Obj_t * pFan0, * pFan1;
if ( !Gia_ObjRecognizeExor( pObj, &pFan0, &pFan1 ) )
return 0;
pFan0 = Gia_Regular(pFan0);
pFan1 = Gia_Regular(pFan1);
if ( Acec_DetectBoothTwoXor( p, pFan0, pIns ) )
{
pIns[2] = Gia_ObjId(p, pFan1);
return 1;
}
if ( Acec_DetectBoothTwoXor( p, pFan1, pIns ) )
{
pIns[2] = Gia_ObjId(p, pFan0);
return 1;
}
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Acec_DetectBoothTest( Gia_Man_t * p )
{
Gia_Obj_t * pObj;
int i, pIns[5];
Gia_ManForEachAnd( p, pObj, i )
{
if ( !Acec_DetectBoothOne(p, pObj, pIns) && !Acec_DetectBoothTwo(p, pObj, pIns) )
continue;
printf( "obj = %4d : b0 = %4d b1 = %4d b2 = %4d a0 = %4d a1 = %4d\n",
i, pIns[0], pIns[1], pIns[2], pIns[3], pIns[4] );
}
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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