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COFACTORBDDNODE(3) BDD FUNCTIONS COFACTORBDDNODE(3)

NAME

cofactorbddnode - computes the generalized cofactor.

ORIGIN

This software belongs to the ALLIANCE CAD SYSTEM developed by the ASIM team at LIP6 laboratory of Université Pierre et Marie CURIE, in Paris, France.

Web : http://asim.lip6.fr/recherche/alliance/
E-mail : alliance-users@asim.lip6.fr

SYNOPSYS

#include "bdd101.h"
bddnode ∗cofactorbddnode( BddSystem, BddNode1, BddNode2 )
  bddsystem ∗BddSystem;
  bddnode   ∗BddNode1;
  bddnode   ∗BddNode2;

PARAMETERS

BddSystem
The bdd system.
BddNode1
The first bdd node.
BddNode2
The second bdd node.

DESCRIPTION

cofactorbddnode computes the generalized cofactor of BddNode1 by BddNode2, in the bdd system BddSystem. If a null pointer is given, the default bdd system is used.

RETURN VALUE

cofactorbddnode returns the resulting bdd node.

ERRORS

"index xxx out of range"
The BddNode2 parameter must be different to the zero bdd node.

EXAMPLE

#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode1;
   bddnode    ∗BddNode2;
   bddnode    ∗BddNode;
   chain_list ∗Expr;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   Expr = createablbinexpr( ABL_OR,
                            createablatom( "i0" ),
                            createablatom( "i1" ) );
   BddNode1 = addbddcircuitabl( BddCircuit, Expr );
   freeablexpr( Expr );
   Expr = createablbinexpr( ABL_AND,
                            createablatom( "i0" ),
                            createablatom( "i1" ) );
   BddNode2 = addbddcircuitabl( BddCircuit, Expr );
   freeablexpr( Expr );
   BddNode = cofactorbddnode( (bddsystem ∗)0, BddNode1, BddNode2 );
   Expr = convertbddcircuitabl( BddCircuit, BddNode );
   /* displays '1' */
   viewablexpr( Expr, ABL_VIEW_VHDL );
   freeablexpr( Expr );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );

SEE ALSO

bdd(1)

BUG REPORT

This tool is under development at the ASIM department of the LIP6 laboratory.
We need your feedback to improve documentation and tools.

October 1, 1997 ASIM/LIP6