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/**CFile****************************************************************
FileName [dchCore.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Choice computation for tech-mapping.]
Synopsis [The core procedures.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 29, 2008.]
Revision [$Id: dchCore.c,v 1.00 2008/07/29 00:00:00 alanmi Exp $]
***********************************************************************/
#include "dchInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [This procedure sets default parameters.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManSetDefaultParams( Dch_Pars_t * p )
{
memset( p, 0, sizeof(Dch_Pars_t) );
p->nWords = 8; // the number of simulation words
p->nBTLimit = 1000; // conflict limit at a node
p->nSatVarMax = 5000; // the max number of SAT variables
p->fSynthesis = 1; // derives three snapshots
p->fPolarFlip = 1; // uses polarity adjustment
p->fSimulateTfo = 1; // simulate TFO
p->fPower = 0; // power-aware rewriting
p->fLightSynth = 0; // uses lighter version of synthesis
p->fSkipRedSupp = 0; // skips choices with redundant structural support
p->fVerbose = 0; // verbose stats
p->nNodesAhead = 1000; // the lookahead in terms of nodes
p->nCallsRecycle = 100; // calls to perform before recycling SAT solver
}
/**Function*************************************************************
Synopsis [Returns verbose parameter.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dch_ManReadVerbose( Dch_Pars_t * p )
{
return p->fVerbose;
}
/**Function*************************************************************
Synopsis [Performs computation of AIGs with choices.]
Description [Takes several AIGs and performs choicing.]
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Dch_ComputeChoices( Aig_Man_t * pAig, Dch_Pars_t * pPars )
{
Dch_Man_t * p;
Aig_Man_t * pResult;
clock_t clk, clkTotal = clock();
// reset random numbers
Aig_ManRandom(1);
// start the choicing manager
p = Dch_ManCreate( pAig, pPars );
// compute candidate equivalence classes
clk = clock();
p->ppClasses = Dch_CreateCandEquivClasses( pAig, pPars->nWords, pPars->fVerbose );
p->timeSimInit = clock() - clk;
// Dch_ClassesPrint( p->ppClasses, 0 );
p->nLits = Dch_ClassesLitNum( p->ppClasses );
// perform SAT sweeping
Dch_ManSweep( p );
// free memory ahead of time
p->timeTotal = clock() - clkTotal;
Dch_ManStop( p );
// create choices
ABC_FREE( pAig->pTable );
pResult = Dch_DeriveChoiceAig( pAig, pPars->fSkipRedSupp );
// count the number of representatives
if ( pPars->fVerbose )
Abc_Print( 1, "STATS: Reprs = %6d. Equivs = %6d. Choices = %6d.\n",
Dch_DeriveChoiceCountReprs( pAig ),
Dch_DeriveChoiceCountEquivs( pResult ),
Aig_ManChoiceNum( pResult ) );
return pResult;
}
/**Function*************************************************************
Synopsis [Performs computation of AIGs with choices.]
Description [Takes several AIGs and performs choicing.]
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ComputeEquivalences( Aig_Man_t * pAig, Dch_Pars_t * pPars )
{
Dch_Man_t * p;
clock_t clk, clkTotal = clock();
// reset random numbers
Aig_ManRandom(1);
// start the choicing manager
p = Dch_ManCreate( pAig, pPars );
// compute candidate equivalence classes
clk = clock();
p->ppClasses = Dch_CreateCandEquivClasses( pAig, pPars->nWords, pPars->fVerbose );
p->timeSimInit = clock() - clk;
// Dch_ClassesPrint( p->ppClasses, 0 );
p->nLits = Dch_ClassesLitNum( p->ppClasses );
// perform SAT sweeping
Dch_ManSweep( p );
// free memory ahead of time
p->timeTotal = clock() - clkTotal;
Dch_ManStop( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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