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:
Mar. 20, 2012
Filed:
Sep. 25, 2008
David Papa, Austin, TX (US);
Michael D. Moffitt, Austin, TX (US);
David Papa, Austin, TX (US);
Michael D. Moffitt, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A portion of a gate-level netlist representing an integrated circuit design is selected for optimization. A timing window representing the selected portion is made comprising one or more copies of the selected portion. A checkpoint is created for the timing window and stored in a transaction history. One or more changes are then made to the timing window and stored in the transaction history. The changed elements are marked as dirty and stored in the transaction history. After the one or more changes have been made, the timing window is queried for current timing conditions and compared with the checkpoint. If the one or more changes are an improvement, the one or more changes are committed by replicating the one or more changes to the portion of the gate-level netlist. If the one or more changes are not an improvement, the timing window may be restored to the checkpoint.