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/**CFile****************************************************************
FileName [ioWriteCnf.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Command processing package.]
Synopsis [Procedures to output CNF of the miter cone.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: ioWriteCnf.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "ioAbc.h"
#include "satSolver.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static Abc_Ntk_t * s_pNtk = NULL;
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Write the miter cone into a CNF file for the SAT solver.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Io_WriteCnf( Abc_Ntk_t * pNtk, char * pFileName, int fAllPrimes )
{
sat_solver * pSat;
if ( Abc_NtkIsStrash(pNtk) )
printf( "Io_WriteCnf() warning: Generating CNF by applying heuristic AIG to CNF conversion.\n" );
else
printf( "Io_WriteCnf() warning: Generating CNF by convering logic nodes into CNF clauses.\n" );
if ( Abc_NtkPoNum(pNtk) != 1 )
{
fprintf( stdout, "Io_WriteCnf(): Currently can only process the miter (the network with one PO).\n" );
return 0;
}
if ( Abc_NtkLatchNum(pNtk) != 0 )
{
fprintf( stdout, "Io_WriteCnf(): Currently can only process the miter for combinational circuits.\n" );
return 0;
}
if ( Abc_NtkNodeNum(pNtk) == 0 )
{
fprintf( stdout, "The network has no logic nodes. No CNF file is generaled.\n" );
return 0;
}
// convert to logic BDD network
if ( Abc_NtkIsLogic(pNtk) )
Abc_NtkToBdd( pNtk );
// create solver with clauses
pSat = (sat_solver *)Abc_NtkMiterSatCreate( pNtk, fAllPrimes );
if ( pSat == NULL )
{
fprintf( stdout, "The problem is trivially UNSAT. No CNF file is generated.\n" );
return 1;
}
// write the clauses
s_pNtk = pNtk;
Sat_SolverWriteDimacs( pSat, pFileName, 0, 0, 1 );
s_pNtk = NULL;
// free the solver
sat_solver_delete( pSat );
return 1;
}
/**Function*************************************************************
Synopsis [Output the mapping of PIs into variable numbers.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Io_WriteCnfOutputPiMapping( FILE * pFile, int incrementVars )
{
extern Vec_Int_t * Abc_NtkGetCiSatVarNums( Abc_Ntk_t * pNtk );
Abc_Ntk_t * pNtk = s_pNtk;
Vec_Int_t * vCiIds;
Abc_Obj_t * pObj;
int i;
vCiIds = Abc_NtkGetCiSatVarNums( pNtk );
fprintf( pFile, "c PI variable numbers: <PI_name> <SAT_var_number>\n" );
Abc_NtkForEachCi( pNtk, pObj, i )
fprintf( pFile, "c %s %d\n", Abc_ObjName(pObj), Vec_IntEntry(vCiIds, i) + (int)(incrementVars > 0) );
Vec_IntFree( vCiIds );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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