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Diffstat (limited to 'src/aig/cec/cecCore.c')
| -rw-r--r-- | src/aig/cec/cecCore.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/aig/cec/cecCore.c b/src/aig/cec/cecCore.c new file mode 100644 index 00000000..86287a96 --- /dev/null +++ b/src/aig/cec/cecCore.c @@ -0,0 +1,233 @@ +/**CFile**************************************************************** + + FileName [cecCore.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Combinatinoal equivalence checking.] + + Synopsis [Core procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: cecCore.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "cecInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [This procedure sets default parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec_ManSatSetDefaultParams( Cec_ParSat_t * p ) +{ + memset( p, 0, sizeof(Cec_ParSat_t) ); + p->nBTLimit = 100; // conflict limit at a node + p->nSatVarMax = 2000; // the max number of SAT variables + p->nCallsRecycle = 10; // calls to perform before recycling SAT solver + p->fFirstStop = 0; // stop on the first sat output + p->fPolarFlip = 0; // uses polarity adjustment + p->fVerbose = 0; // verbose stats +} + +/**Function************************************************************* + + Synopsis [This procedure sets default parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec_ManCswSetDefaultParams( Cec_ParCsw_t * p ) +{ + memset( p, 0, sizeof(Cec_ParCsw_t) ); + p->nWords = 15; // the number of simulation words + p->nRounds = 10; // the number of simulation rounds + p->nBTlimit = 10; // conflict limit at a node + p->fRewriting = 0; // enables AIG rewriting + p->fVerbose = 1; // verbose stats +} + +/**Function************************************************************* + + Synopsis [This procedure sets default parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec_ManCecSetDefaultParams( Cec_ParCec_t * p ) +{ + memset( p, 0, sizeof(Cec_ParCec_t) ); + p->nIters = 5; // iterations of SAT solving/sweeping + p->nBTLimitBeg = 2; // starting backtrack limit + p->nBTlimitMulti = 8; // multiple of backtrack limiter + p->fUseSmartCnf = 0; // use smart CNF computation + p->fRewriting = 0; // enables AIG rewriting + p->fSatSweeping = 0; // enables SAT sweeping + p->fFirstStop = 0; // stop on the first sat output + p->fVerbose = 1; // verbose stats +} + + +/**Function************************************************************* + + Synopsis [Performs equivalence checking.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cec_Sweep( Aig_Man_t * pAig, int nBTLimit ) +{ + Cec_MtrStatus_t Status; + Cec_ParCsw_t ParsCsw, * pParsCsw = &ParsCsw; + Cec_ParSat_t ParsSat, * pParsSat = &ParsSat; + Caig_Man_t * pCaig; + Aig_Man_t * pSRAig; + int clk; + + Cec_ManCswSetDefaultParams( pParsCsw ); + pParsCsw->nBTlimit = nBTLimit; + pCaig = Caig_ManClassesPrepare( pAig, pParsCsw->nWords, pParsCsw->nRounds ); + + pSRAig = Caig_ManSpecReduce( pCaig ); + Aig_ManPrintStats( pSRAig ); + + Cec_ManSatSetDefaultParams( pParsSat ); + pParsSat->fFirstStop = 0; + pParsSat->nBTLimit = pParsCsw->nBTlimit; +clk = clock(); + Status = Cec_SatSolveOutputs( pSRAig, pParsSat ); + Cec_MiterStatusPrint( Status, "SRM ", clock() - clk ); + + Aig_ManStop( pSRAig ); + + Caig_ManDelete( pCaig ); + + return 1; +} + +/**Function************************************************************* + + Synopsis [Performs equivalence checking.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cec_Solve( Aig_Man_t * pAig0, Aig_Man_t * pAig1, Cec_ParCec_t * pPars ) +{ + Cec_ParSat_t ParsSat, * pParsSat = &ParsSat; + Cec_MtrStatus_t Status; + Aig_Man_t * pMiter; + int i, clk = clock(); + if ( pPars->fVerbose ) + { + Status = Cec_MiterStatusTrivial( pAig0 ); + Status.nNodes += pAig1? Aig_ManNodeNum( pAig1 ) : 0; + Cec_MiterStatusPrint( Status, "Init ", 0 ); + } + // create combinational miter + if ( pAig1 == NULL ) + { + Status = Cec_MiterStatus( pAig0 ); + if ( Status.nSat > 0 && pPars->fFirstStop ) + { + if ( pPars->fVerbose ) + printf( "Output %d is trivially SAT.\n", Status.iOut ); + return 0; + } + if ( Status.nUndec == 0 ) + { + if ( pPars->fVerbose ) + printf( "The miter has no undecided outputs.\n" ); + return 1; + } + pMiter = Cec_Duplicate( pAig0 ); + } + else + { + pMiter = Cec_DeriveMiter( pAig0, pAig1 ); + Status = Cec_MiterStatus( pMiter ); + if ( Status.nSat > 0 && pPars->fFirstStop ) + { + if ( pPars->fVerbose ) + printf( "Output %d is trivially SAT.\n", Status.iOut ); + Aig_ManStop( pMiter ); + return 0; + } + if ( Status.nUndec == 0 ) + { + if ( pPars->fVerbose ) + printf( "The problem is solved by structrual hashing.\n" ); + Aig_ManStop( pMiter ); + return 1; + } + } + if ( pPars->fVerbose ) + Cec_MiterStatusPrint( Status, "Strash", clock() - clk ); + // start parameter structures + Cec_ManSatSetDefaultParams( pParsSat ); + pParsSat->fFirstStop = pPars->fFirstStop; + pParsSat->nBTLimit = pPars->nBTLimitBeg; + for ( i = 0; i < pPars->nIters; i++ ) + { + // try SAT solving + clk = clock(); + pParsSat->nBTLimit *= pPars->nBTlimitMulti; + Status = Cec_SatSolveOutputs( pMiter, pParsSat ); + if ( pPars->fVerbose ) + Cec_MiterStatusPrint( Status, "SAT ", clock() - clk ); + if ( Status.nSat && pParsSat->fFirstStop ) + break; + if ( Status.nUndec == 0 ) + break; + + // try rewriting + + // try SAT sweeping + Cec_Sweep( pMiter, 10 ); + i = i; + } + Aig_ManStop( pMiter ); + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |