NAME¶

composebddnode - substitutes a variable by a bdd in another bdd.

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 ∗composebddnode( BddSystem, BddNode, Variable, BddSubst )


  bddsystem ∗BddSystem;


  bddnode   ∗BddNode;


  bddvar     Variable;


  bddnode   ∗BddSubst;

PARAMETERS¶

BddSystem

The bdd system.

BddNode

The bdd node.

Variable

The variable to find.

BddSubst

The bdd to substitute with.

DESCRIPTION¶

composebddnode substitutes all the occurency of the variable Variable in the bdd node BddNode by the bdd node BddSubst, in the bdd system BddSystem. If a null pointer is given, the default bdd system is used.

RETURN VALUE¶

composebddnode returns the resulting bdd node.

ERRORS¶

"variable xxx out of range, error !"

EXAMPLE¶

#include "bdd101.h"


   bddsystem  ∗BddSystem;


   bddcircuit ∗BddCircuit;


   bddnode    ∗BddVariable;


   bddnode    ∗BddNode;


   bddnode    ∗BddSubst;


   chain_list ∗Expr;


   bddvar         Variable;


   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );


   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );


   Expr = createablbinexpr( ABL_AND,


                            createablatom( "i0" ),


                            createablatom( "i1" ) );


   BddNode = addbddcircuitabl( BddCircuit, Expr );


   freeablexpr( Expr );


   Expr = createablbinexpr( ABL_OR,


                            createablatom( "i2" ),


                            createablatom( "i3" ) );


   BddSubst = addbddcircuitabl( BddCircuit, Expr );


   freeablexpr( Expr );


   BddVariable = searchbddcircuitin( (bddcircuit ∗)0, "i0" );


   Variable = getbddvarbyindex( (bddsystem ∗)0, BddVariable->INDEX );


   BddNode = composebddnode( (bddsystem ∗)0, BddNode, Variable, BddSubst );


   Expr = convertbddcircuitabl( BddCircuit, BddNode );


   /* displays (i1 and (i2 or i3)) */


   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.