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. 29, 2020
Filed:
Sep. 06, 2019
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Shivam Priyadarshi, Morrisville, NC (US);
Yusuf Cagatay Tekmen, Raleigh, NC (US);
Kiran Ravi Seth, Morrisville, NC (US);
Rodney Wayne Smith, Raleigh, NC (US);
Vignyan Reddy Kothinti Naresh, Morrisville, NC (US);
Microsoft Technology Licensing, LLC, Redmond, WA (US);
Abstract
Minimizing traversal of a processor reorder buffer (ROB) for register rename map table (RMT) state recovery for interrupted instruction recovery in a processor. Instructions may execute out of order in a processor. Information about the logical register-to-physical register mapping resulting from each instruction is stored in entries in program order in the ROB. When the pipeline is interrupted by an instruction that fails to execute, changing program flow, all instructions following the interrupting instruction may be flushed from the processor pipeline. It is important to return the state of the RMT to the state that existed when the interrupting instruction entered the pipeline. To recover the RMT state in response to an interrupting instruction, register mapping information in the ROB entries is traversed to either undo the younger instructions that entered the pipeline after the interrupting instruction or replay the older instructions that entered the pipeline before the interrupting instruction.