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/**CFile****************************************************************
FileName [sscCore.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [SAT sweeping under constraints.]
Synopsis [The core procedures.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 29, 2008.]
Revision [$Id: sscCore.c,v 1.00 2008/07/29 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sscInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [This procedure sets default parameters.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssc_ManSetDefaultParams( Ssc_Pars_t * p )
{
memset( p, 0, sizeof(Ssc_Pars_t) );
p->nWords = 4; // the number of simulation words
p->nBTLimit = 1000; // conflict limit at a node
p->nSatVarMax = 5000; // the max number of SAT variables
p->nCallsRecycle = 100; // calls to perform before recycling SAT solver
p->fVerbose = 0; // verbose stats
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssc_ManStop( Ssc_Man_t * p )
{
if ( p->pSat )
sat_solver_delete( p->pSat );
Vec_IntFreeP( &p->vSatVars );
Gia_ManStopP( &p->pFraig );
Vec_IntFreeP( &p->vPivot );
ABC_FREE( p );
}
Ssc_Man_t * Ssc_ManStart( Gia_Man_t * pAig, Gia_Man_t * pCare, Ssc_Pars_t * pPars )
{
Ssc_Man_t * p;
p = ABC_CALLOC( Ssc_Man_t, 1 );
p->pPars = pPars;
p->pAig = pAig;
p->pCare = pCare;
p->pFraig = Gia_ManDup( p->pCare );
Gia_ManInvertPos( p->pFraig );
Ssc_ManStartSolver( p );
if ( p->pSat == NULL )
{
printf( "Constraints are UNSAT after propagation.\n" );
Ssc_ManStop( p );
return NULL;
}
p->vPivot = Ssc_GiaFindPivotSim( p->pFraig );
// Vec_IntFreeP( &p->vPivot );
if ( p->vPivot == NULL )
p->vPivot = Ssc_ManFindPivotSat( p );
if ( p->vPivot == NULL )
{
printf( "Constraints are UNSAT or conflict limit is too low.\n" );
Ssc_ManStop( p );
return NULL;
}
Vec_IntPrint( p->vPivot );
return p;
}
/**Function*************************************************************
Synopsis [Performs computation of AIGs with choices.]
Description [Takes several AIGs and performs choicing.]
SideEffects []
SeeAlso []
***********************************************************************/
Gia_Man_t * Ssc_PerformSweeping( Gia_Man_t * pAig, Gia_Man_t * pCare, Ssc_Pars_t * pPars )
{
Ssc_Man_t * p;
Gia_Man_t * pResult;
clock_t clk, clkTotal = clock();
int i;
assert( Gia_ManRegNum(pCare) == 0 );
assert( Gia_ManPiNum(pAig) == Gia_ManPiNum(pCare) );
assert( Gia_ManIsNormalized(pAig) );
assert( Gia_ManIsNormalized(pCare) );
// reset random numbers
Gia_ManRandom( 1 );
// sweeping manager
p = Ssc_ManStart( pAig, pCare, pPars );
if ( p == NULL )
return Gia_ManDup( pAig );
// perform simulation
clk = clock();
for ( i = 0; i < 16; i++ )
{
Ssc_GiaRandomPiPattern( pAig, 10, NULL );
Ssc_GiaSimRound( pAig );
Ssc_GiaClassesRefine( pAig );
Gia_ManEquivPrintClasses( pAig, 0, 0 );
}
p->timeSimInit += clock() - clk;
// remember the resulting AIG
pResult = Gia_ManEquivReduce( pAig, 1, 0, 0 );
if ( pResult == NULL )
{
printf( "There is no equivalences.\n" );
pResult = Gia_ManDup( pAig );
}
Ssc_ManStop( p );
// count the number of representatives
if ( pPars->fVerbose )
{
Gia_ManEquivPrintClasses( pAig, 0, 0 );
Abc_Print( 1, "Reduction in AIG nodes:%8d ->%8d. ", Gia_ManAndNum(pAig), Gia_ManAndNum(pResult) );
Abc_PrintTime( 1, "Time", clock() - clkTotal );
}
return pResult;
}
Gia_Man_t * Ssc_PerformSweepingConstr( Gia_Man_t * p, Ssc_Pars_t * pPars )
{
Gia_Man_t * pAig, * pCare, * pResult;
int i;
if ( p->nConstrs == 0 )
{
pAig = Gia_ManDup( p );
pCare = Gia_ManStart( Gia_ManPiNum(p) + 2 );
pCare->pName = Abc_UtilStrsav( "care" );
for ( i = 0; i < Gia_ManPiNum(p); i++ )
Gia_ManAppendCi( pCare );
Gia_ManAppendCo( pCare, 1 );
}
else
{
Vec_Int_t * vOuts = Vec_IntStartNatural( Gia_ManPoNum(p) );
pAig = Gia_ManDupCones( p, Vec_IntArray(vOuts), Gia_ManPoNum(p) - p->nConstrs, 0 );
pCare = Gia_ManDupCones( p, Vec_IntArray(vOuts) + Gia_ManPoNum(p) - p->nConstrs, p->nConstrs, 0 );
Vec_IntFree( vOuts );
}
pResult = Ssc_PerformSweeping( pAig, pCare, pPars );
Gia_ManStop( pAig );
Gia_ManStop( pCare );
return pResult;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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