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:
Dec. 06, 2016
Filed:
Jun. 10, 2015
Applicant:
International Business Machines Corporation, Armonk, NY (US);
Inventors:
Benjamin Carter Nowak, Austin, TX (US);
Guy Lynn Guthrie, Austin, TX (US);
Venkat R. Indukuru, Austin, TX (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 12/08 (2016.01);
U.S. Cl.
CPC ...
G06F 12/0815 (2013.01); G06F 12/0804 (2013.01); G06F 2212/1016 (2013.01); G06F 2212/1032 (2013.01); G06F 2212/281 (2013.01); G06F 2212/608 (2013.01); G06F 2212/62 (2013.01);
Abstract
A hint bit detection and correction method uses two additional bits as part of every cache directory. These bits represent the lwarx and stwcx instructions (larx disp, stcx disp). When a hint bit event occurs, depending the on combination of these two bits, there can be an indication of a hint bit error. Once a hint bit error is detected a software interrupt is issued and the hint bit correction method identifies and corrects the incorrect hint bit.