ABC_NAMESPACE_IMPL_START
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/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
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/**Function*************************************************************
Synopsis [Checks containment of the function in the ISF.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Bdc_TableCheckContainment( Bdc_Man_t * p, Bdc_Isf_t * pIsf, unsigned * puTruth )
{
return Kit_TruthIsImply( pIsf->puOn, puTruth, p->nVars ) &&
Kit_TruthIsDisjoint( puTruth, pIsf->puOff, p->nVars );
}
/**Function*************************************************************
Synopsis [Checks existence of weak OR-bidecomposition.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Bdc_DecomposeWeakOr( Bdc_Man_t * p, Bdc_Isf_t * pIsf, Bdc_Isf_t * pIsfL, Bdc_Isf_t * pIsfR )
{
int v, VarCost, VarBest, Cost, VarCostBest = 0;
for ( v = 0; v < p->nVars; v++ )
{
Kit_TruthExistNew( p->puTemp1, pIsf->puOff, p->nVars, v );
// if ( (Q & !bdd_exist( R, VarSetXa )) != bddfalse )
// Exist = Cudd_bddExistAbstract( dd, pF->R, Var ); Cudd_Ref( Exist );
// if ( Cudd_bddIteConstant( dd, pF->Q, Cudd_Not(Exist), b0 ) != b0 )
if ( !Kit_TruthIsImply( pIsf->puOn, p->puTemp1, p->nVars ) )
{
// measure the cost of this variable
// VarCost = bdd_satcountset( bdd_forall( Q, VarSetXa ), VarCube );
// Univ = Cudd_bddUnivAbstract( dd, pF->Q, Var ); Cudd_Ref( Univ );
// VarCost = Kit_TruthCountOnes( Univ, p->nVars );
// Cudd_RecursiveDeref( dd, Univ );
Kit_TruthForallNew( p->puTemp2, pIsf->puOn, p->nVars, v );
VarCost = Kit_TruthCountOnes( p->puTemp2, p->nVars );
if ( VarCost == 0 )
VarCost = 1;
if ( VarCostBest < VarCost )
{
VarCostBest = VarCost;
VarBest = v;
}
}
}
// derive the components for weak-bi-decomposition if the variable is found
if ( VarCostBest )
{
// funQLeftRes = Q & bdd_exist( R, setRightORweak );
// Temp = Cudd_bddExistAbstract( dd, pF->R, VarBest ); Cudd_Ref( Temp );
// pL->Q = Cudd_bddAnd( dd, pF->Q, Temp ); Cudd_Ref( pL->Q );
// Cudd_RecursiveDeref( dd, Temp );
Kit_TruthExistNew( p->puTemp1, pIsf->puOff, p->nVars, VarBest );
Kit_TruthAnd( pIsfL->puOn, pIsf->puOn, p->puTemp1, p->nVars );
// pL->R = pF->R; Cudd_Ref( pL->R );
// pL->V = VarBest; Cudd_Ref( pL->V );
Kit_TruthCopy( pIsfL->puOff, pIsf->puOff, p->nVars );
pIsfL->Var = VarBest;
// assert( pL->Q != b0 );
// assert( pL->R != b0 );
// assert( Cudd_bddIteConstant( dd, pL->Q, pL->R, b0 ) == b0 );
// express cost in percents of the covered boolean space
Cost = VarCostBest * BDC_SCALE / (1<<p->nVars);
if ( Cost == 0 )
Cost = 1;
return Cost;
}
return 0;
}
