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Improvements to CNF generation.

This commit is contained in:
Alan Mishchenko 2014-06-23 14:50:46 -07:00
parent e19d21a09b
commit f79d8e4b04
2 changed files with 10 additions and 1 deletions
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9
src/aig/gia/giaMf.c
View File

@ -455,6 +455,15 @@ Cnf_Dat_t * Mf_ManDeriveCnf( Mf_Man_t * p, int fCnfObjIds, int fAddOrCla )
pCnf->pVarNums[Id] = pCnfIds[Gia_ManCiIdToId(p->pGia, i)];
Gia_ManForEachCoId( p->pGia0, Id, i )
pCnf->pVarNums[Id] = pCnfIds[Gia_ManCoIdToId(p->pGia, i)];
/*
// transform polarity of the internal nodes
Gia_ManSetPhase( p->pGia );
Gia_ManForEachCo( p->pGia, pObj, i )
pObj->fPhase = 0;
for ( i = 0; i < pCnf->nLiterals; i++ )
if ( Gia_ManObj(p->pGia, Abc_Lit2Var(pCnf->pClauses[0][i]))->fPhase )
pCnf->pClauses[0][i] = Abc_LitNot( pCnf->pClauses[0][i] );
*/
}
else
pCnf->pVarNums = Vec_IntReleaseArray(vCnfIds);

2
src/base/io/io.c
View File

@ -1914,7 +1914,7 @@ int IoCommandWriteCnf( Abc_Frame_t * pAbc, int argc, char **argv )
usage:
fprintf( pAbc->Err, "usage: write_cnf [-nfpcvh] <file>\n" );
fprintf( pAbc->Err, "\t writes the miter cone into a CNF file\n" );
fprintf( pAbc->Err, "\t generated CNF for the miter (see also \"&write_cnf\")\n" );
fprintf( pAbc->Err, "\t-n : toggle using new algorithm [default = %s]\n", fNewAlgo? "yes" : "no" );
fprintf( pAbc->Err, "\t-f : toggle using fast algorithm [default = %s]\n", fFastAlgo? "yes" : "no" );
fprintf( pAbc->Err, "\t-p : toggle using all primes to enhance implicativity [default = %s]\n", fAllPrimes? "yes" : "no" );