/**Function*************************************************************
Synopsis [Counts the number of EXOR type nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Fraig_ManCountExors( Fraig_Man_t * pMan )
{
int i, nExors;
nExors = 0;
for ( i = 0; i < pMan->vNodes->nSize; i++ )
nExors += Fraig_NodeIsExorType( pMan->vNodes->pArray[i] );
return nExors;
}
/**Function*************************************************************
Synopsis [Returns 1 if the node is EXOR, 0 if it is NEXOR.]
Description [The node should be EXOR type and not complemented.]
SideEffects []
SeeAlso []
***********************************************************************/
int Fraig_NodeIsExor( Fraig_Node_t * pNode )
{
Fraig_Node_t * pNode1;
assert( !Fraig_IsComplement(pNode) );
assert( Fraig_NodeIsExorType(pNode) );
assert( Fraig_IsComplement(pNode->p1) );
// get children
pNode1 = Fraig_Regular(pNode->p1);
return Fraig_IsComplement(pNode1->p1) == Fraig_IsComplement(pNode1->p2);
}
/**Function*************************************************************
Synopsis [Adds clauses to the solver.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Fraig_SupergateAddClausesExor( Fraig_Man_t * p, Fraig_Node_t * pNode )
{
Fraig_Node_t * pNode1, * pNode2;
int fComp, RetValue;
assert( !Fraig_IsComplement( pNode ) );
assert( Fraig_NodeIsExorType( pNode ) );
// get nodes
pNode1 = Fraig_Regular(Fraig_Regular(pNode->p1)->p1);
pNode2 = Fraig_Regular(Fraig_Regular(pNode->p1)->p2);
// get the complemented attribute of the EXOR/NEXOR gate
fComp = Fraig_NodeIsExor( pNode ); // 1 if EXOR, 0 if NEXOR
// create four clauses
Msat_IntVecClear( p->vProj );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode->Num, fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode1->Num, fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode2->Num, fComp) );
RetValue = Msat_SolverAddClause( p->pSat, p->vProj );
assert( RetValue );
Msat_IntVecClear( p->vProj );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode->Num, fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode1->Num, !fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode2->Num, !fComp) );
RetValue = Msat_SolverAddClause( p->pSat, p->vProj );
assert( RetValue );
Msat_IntVecClear( p->vProj );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode->Num, !fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode1->Num, fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode2->Num, !fComp) );
RetValue = Msat_SolverAddClause( p->pSat, p->vProj );
assert( RetValue );
Msat_IntVecClear( p->vProj );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode->Num, !fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode1->Num, !fComp) );
Msat_IntVecPush( p->vProj, MSAT_VAR2LIT(pNode2->Num, fComp) );
RetValue = Msat_SolverAddClause( p->pSat, p->vProj );
assert( RetValue );
}
