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. 27, 2005
Filed:
Nov. 02, 2000
Darrell D. Boggs, Aloha, OR (US);
Douglas M. Carmean, Beaverton, OR (US);
Per H. Hammarlund, Hillsboro, OR (US);
Francis X. Mckeen, Portland, OR (US);
David J. Sager, Portland, OR (US);
Ronak Singhal, Beaverton, OR (US);
Darrell D. Boggs, Aloha, OR (US);
Douglas M. Carmean, Beaverton, OR (US);
Per H. Hammarlund, Hillsboro, OR (US);
Francis X. McKeen, Portland, OR (US);
David J. Sager, Portland, OR (US);
Ronak Singhal, Beaverton, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
Breaking replay dependency loops in a processor using a rescheduled replay queue. The processor comprises a replay queue to receive a plurality of instructions, and an execution unit to execute the plurality of instructions. A scheduler is coupled between the replay queue and the execution unit. The scheduler speculatively schedules instructions for execution and increments a counter for each of the plurality of instructions to reflect the number of times each of the plurality of instructions has been executed. The scheduler also dispatches each instruction to the execution unit either when the counter does not exceed a maximum number of replays or, if the counter exceeds the maximum number of replays, when the instruction is safe to execute. A checker is coupled to the execution unit to determine whether each instruction has executed successfully. The checker is also coupled to the replay queue to communicate to the replay queue each instruction that has not executed successfully.