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:
Jun. 30, 2015
Filed:
Sep. 16, 2011
Brian R. Konigsburg, Austin, TX (US);
David S. Levitan, Austin, TX (US);
Brian R. Mestan, Austin, TX (US);
David Mui, Round Rock, TX (US);
Brian R. Konigsburg, Austin, TX (US);
David S. Levitan, Austin, TX (US);
Brian R. Mestan, Austin, TX (US);
David Mui, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A technique for reducing store-hit-loads in an out-of-order processor includes storing a store address of a store instruction associated with a store-hit-load (SHL) pipeline flush in an SHL entry. In response to detecting another SHL pipeline flush for the store address, a current count associated with the SHL entry is updated. In response to the current count associated with the SHL entry reaching a first terminal count, a dependency for the store instruction is created such that execution of a younger load instruction with a load address that overlaps the store address stalls until the store instruction executes.