Table of Contents

Origin

This software belongs to the ALLIANCE CAD system from the CAO-VLSI team at ASIM/LIP6/UPMC laboratory.
LIP6/ASIM
University P. et M. Curie 4, place Jussieu 75252 PARIS Cedex 05 FRANCE
Fax : {33/0} 1.44.27.62.86
E-mail support : alliance-support@asim.lip6.fr

Name

constraintCct - restricts all the outputs within a circuit with a BDD constraint

Synopsys

#include logmmm.h"
void constraintCct(pC,pBdd)
pCircuit pC;
pNode pBdd;

Parameters

pC
Circuit in which is made the restriction
pBdd
BDD constraint

Description

constraintCct() restricts the boolean space to the sub-space corresponding to the on-set of pBdd. This function can be called when a primary input is stuck at 0 or 1.

Example

#include mutnnn.h
/* mbk utilities */ #include logmmm.h" chain_list *expr; pNode res; pCircuit pC;

initializeBdd(SMALL_BDD);
pC = initializeCct("circuit 1",10,10);

addInputCct(pC,"a");
addInputCct(pC,"b");

addOutputCct(pC,"s",applyBinBdd(XOR,
createNodeTermBdd(searchInputCct(pC,"a")), createNodeTermBdd(searchInputCct(pC,"b"))));

/* b is stuck at 1 */

constraintCct(pC,createNodeTermBdd(searchInputCct(pC,"b"))); displayCct(pC,1);

/* it will display
************* DISPLAY circuit 1 ********* INPUT = a INDEX = 2
INPUT = b INDEX = 3
----------- NUMBER OF INPUTS = 2

OUTPUT = s
s = (NOT a) ----------- NUMBER OF OUTPUTS = 1 ***************************************** */

destroyCct(pC) ;
destroyBdd(1) ;

See Also

log(1) , bdd(1) , abl(1) , upVarCct(3) , composeCct(3) .

Bug Report

This tool is under development at the ASIM/LIP6/UPMC laboratory, cao-vlsi research team.
We need your feedbak to improve documentation and tools. If you find bugs, please fill-in the form at http://asim.lip6.fr/alliance/support/bug-report/ Thanks for doing this.


Table of Contents

 



Alliance Web Site © 1997, 2002 ASIM/LIP6/UPMC, page maintained by Czo [Olivier Sirol] , last updated on 26 May 2000.