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/**CFile****************************************************************
FileName [absIter.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Abstraction package.]
Synopsis [Iterative improvement of abstraction.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: absIter.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abs.h"
#include "sat/bmc/bmc.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static inline int Gia_ObjIsInGla( Gia_Man_t * p, Gia_Obj_t * pObj ) { return Vec_IntEntry(p->vGateClasses, Gia_ObjId(p, pObj)); }
static inline void Gia_ObjAddToGla( Gia_Man_t * p, Gia_Obj_t * pObj ) { Vec_IntWriteEntry(p->vGateClasses, Gia_ObjId(p, pObj), 1); }
static inline void Gia_ObjRemFromGla( Gia_Man_t * p, Gia_Obj_t * pObj ) { Vec_IntWriteEntry(p->vGateClasses, Gia_ObjId(p, pObj), 0); }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Gia_IterTryImprove( Gia_Man_t * p, int nTimeOut, int iFrame0 )
{
Gia_Man_t * pAbs = Gia_ManDupAbsGates( p, p->vGateClasses );
Aig_Man_t * pAig = Gia_ManToAigSimple( pAbs );
int nStart = 0;
int nFrames = iFrame0 ? iFrame0 + 1 : 10000000;
int nNodeDelta = 2000;
int nBTLimit = 0;
int nBTLimitAll = 0;
int fVerbose = 0;
int RetValue, iFrame;
RetValue = Saig_BmcPerform( pAig, nStart, nFrames, nNodeDelta, nTimeOut, nBTLimit, nBTLimitAll, fVerbose, 0, &iFrame, 1 );
assert( RetValue == 0 || RetValue == -1 );
Aig_ManStop( pAig );
Gia_ManStop( pAbs );
return iFrame;
}
Gia_Man_t * Gia_ManShrinkGla( Gia_Man_t * p, int nFrameMax, int nTimeOut, int fUsePdr, int fUseSat, int fUseBdd, int fVerbose )
{
Gia_Obj_t * pObj;
int i, iFrame0, iFrame;
int nTotal = 0, nRemoved = 0;
Vec_Int_t * vGScopy;
abctime clk, clkTotal = Abc_Clock();
assert( Gia_ManPoNum(p) == 1 );
assert( p->vGateClasses != NULL );
vGScopy = Vec_IntDup( p->vGateClasses );
if ( nFrameMax == 0 )
iFrame0 = Gia_IterTryImprove( p, 0, 0 );
else
iFrame0 = nFrameMax - 1;
while ( 1 )
{
int fChanges = 0;
Gia_ManForEachObj1( p, pObj, i )
{
if ( pObj->fMark0 )
continue;
if ( !Gia_ObjIsInGla(p, pObj) )
continue;
if ( pObj == Gia_ObjFanin0( Gia_ManPo(p, 0) ) )
continue;
if ( Gia_ObjIsAnd(pObj) )
{
if ( Gia_ObjIsInGla(p, Gia_ObjFanin0(pObj)) && Gia_ObjIsInGla(p, Gia_ObjFanin1(pObj)) )
continue;
}
if ( Gia_ObjIsRo(p, pObj) )
{
if ( Gia_ObjIsInGla(p, Gia_ObjFanin0(Gia_ObjRoToRi(p, pObj))) )
continue;
}
clk = Abc_Clock();
printf( "%5d : ", nTotal );
printf( "Obj =%7d ", i );
Gia_ObjRemFromGla( p, pObj );
iFrame = Gia_IterTryImprove( p, nTimeOut, iFrame0 );
if ( nFrameMax )
assert( iFrame <= nFrameMax );
else
assert( iFrame <= iFrame0 );
printf( "Frame =%6d ", iFrame );
if ( iFrame < iFrame0 )
{
pObj->fMark0 = 1;
Gia_ObjAddToGla( p, pObj );
printf( " " );
}
else
{
fChanges = 1;
nRemoved++;
printf( "Removing " );
Vec_IntWriteEntry( vGScopy, Gia_ObjId(p, pObj), 0 );
}
Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
nTotal++;
// update the classes
Vec_IntFreeP( &p->vGateClasses );
p->vGateClasses = Vec_IntDup(vGScopy);
}
if ( !fChanges )
break;
}
Gia_ManCleanMark0(p);
Vec_IntFree( vGScopy );
printf( "Tried = %d. ", nTotal );
printf( "Removed = %d. (%.2f %%) ", nRemoved, 100.0 * nRemoved / Vec_IntCountPositive(p->vGateClasses) );
Abc_PrintTime( 1, "Time", Abc_Clock() - clkTotal );
return NULL;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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