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:
Sep. 08, 2015
Filed:
May. 04, 2012
Stephan G. Meier, Los Altos, CA (US);
John H. Mylius, Gilroy, CA (US);
Gerard R. Williams, Iii, Los Altos, CA (US);
Suparn Vats, Fremont, CA (US);
Stephan G. Meier, Los Altos, CA (US);
John H. Mylius, Gilroy, CA (US);
Gerard R. Williams, III, Los Altos, CA (US);
Suparn Vats, Fremont, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Methods and apparatuses for managing load-store dependencies in an out-of-order processor. A load store dependency predictor may include a table for storing entries for load-store pairs that have been found to be dependent and execute out of order. Each entry in the table includes a counter to indicate a strength of the dependency prediction. If the counter is above a threshold, a dependency is enforced for the load-store pair. If the counter is below the threshold, the dependency is not enforced for the load-store pair. When a store is dispatched, the table is searched, and any matching entries in the table are armed. If a load is dispatched, matches on an armed entry, and the counter is above the threshold, then the load will wait to issue until the corresponding store issues.