The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Jul. 02, 2009
Jeremy T. Hopkins, Round Rock, TX (US);
John M. Isakson, Austin, TX (US);
Joachim Keinert, Altdorf, DE;
Smita Krishnaswamy, New York, NY (US);
Nilesh A. Modi, Santa Barbara, CA (US);
Ruchir Puri, Baldwin Place, NY (US);
Haoxing Ren, Austin, TX (US);
David L. Rude, Wendell, NC (US);
Jeremy T. Hopkins, Round Rock, TX (US);
John M. Isakson, Austin, TX (US);
Joachim Keinert, Altdorf, DE;
Smita Krishnaswamy, New York, NY (US);
Nilesh A. Modi, Santa Barbara, CA (US);
Ruchir Puri, Baldwin Place, NY (US);
Haoxing Ren, Austin, TX (US);
David L. Rude, Wendell, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer executed method is disclosed which accepts an original circuit with an original logic, accepts a modified circuit, and synthesizes a difference circuit. The difference circuit represents changes that implement the modified circuit's logic for the original circuit. The synthesis may locate an output-side boundary in the original logic in such a manner that the original logic is free of logic changes in between the output-side boundary and the primary output elements of the original circuit. The disclosed synthesis may also locate an input-side boundary in the original logic in such a manner that the original logic is free of logic changes in between the input-side boundary and the primary input elements of the original circuit. A computer program products are also disclosed. The computer program product contains a computer useable medium having a computer readable program code embodied therein. The computer readable program code when executed on a computer causes the computer to carry out the methods of finding input and output side boundaries in an original logic, and synthesizing in between those boundaries a difference circuit representing logic changes.