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:
Feb. 23, 2021
Filed:
Mar. 05, 2019
Advanced Micro Devices, Inc., Santa Clara, CA (US);
David Kaplan, Austin, TX (US);
Marius Evers, Santa Clara, CA (US);
ADVANCED MICRO DEVICES, INC., Santa Clara, CA (US);
Abstract
A state of a first architectural register in a processing system is changed from a first state to a second state that indicates that the first architectural register is to be monitored during speculative execution. A second architectural register in the processing system is associated with a third state in response to the first architectural register being a source register for a memory load instruction that loads data from a memory into the second architectural register during speculative execution. Use of data in the second architectural register is constrained during speculative operations while the second architectural register is in the third state. In some cases, a 'set taint' instruction is executed to change the state of the first architectural register from the first state to the second state.