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. 12, 2018
Filed:
Jun. 14, 2012
Gerard R. Williams, Iii, Lost Altos, CA (US);
John H. Mylius, Gilroy, CA (US);
Conrade Blasco-allue, Sunnyvale, CA (US);
Gerard R. Williams, III, Lost Altos, CA (US);
John H. Mylius, Gilroy, CA (US);
Conrade Blasco-Allue, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A system and method for reducing the latency of load operations. A register rename unit within a processor determines whether a decoded load instruction is eligible for conversion to a zero-cycle load operation. If so, control logic assigns a physical register identifier associated with a source operand of an older dependent store instruction to the destination operand of the load instruction. Additionally, the register rename unit marks the load instruction to prevent it from reading data associated with the source operand of the store instruction from memory. Due to the duplicate renaming, this data may be forwarded from a physical register file to instructions that are younger and dependent on the load instruction.