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:
Apr. 03, 2007
Filed:
Feb. 10, 2005
Fadi Y. Busaba, Poughkeepsie, NY (US);
Michael J. Mack, Round Rock, TX (US);
John G. Rell, Jr., Saugerties, NY (US);
Eric M. Schwarz, Gardiner, NY (US);
Chung-lung K. Shum, Wappingers Falls, NY (US);
Timothy J. Slegel, Staatsburg, NY (US);
Scott B. Swaney, Catskill, NY (US);
Sheryll H. Veneracion, Pleasant Valley, NY (US);
Fadi Y. Busaba, Poughkeepsie, NY (US);
Michael J. Mack, Round Rock, TX (US);
John G. Rell, Jr., Saugerties, NY (US);
Eric M. Schwarz, Gardiner, NY (US);
Chung-Lung K. Shum, Wappingers Falls, NY (US);
Timothy J. Slegel, Staatsburg, NY (US);
Scott B. Swaney, Catskill, NY (US);
Sheryll H. Veneracion, Pleasant Valley, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for creating precise exceptions including checkpointing an exception causing instruction. The checkpointing results in a current checkpointed state. The current checkpointed state is locked. It is determined if any of a plurality of registers require restoration to the current checkpointed state. One or more of the registers are restored to the current checkpointed state in response to the results of the determining indicating that the one or more registers require the restoring. The execution unit is restarted at the exception handler or the next sequential instruction dependent on whether traps are enabled for the exception.