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. 05, 2019
Filed:
Apr. 01, 2016
Arm Limited, Cambridge, GB;
Cedric Denis Robert Airaud, Saint Laurent du Var, FR;
Luca Scalabrino, Villeneuve Loubet, FR;
Frederic Jean Denis Arsanto, Le Rouret, FR;
Thomas Gilles Tarridec, Juan-les-Pins, FR;
ARM Limited, Cambridge, GB;
Abstract
An apparatus has register rename circuitry to map architectural register specifiers specified by instructions to physical register specifiers identifying physical registers. A restoration table identifies at least one restoration mapping between an architectural register specifier and a previously mapped physical register specifier. Register reserving circuitry indicates one or more reserved register specifiers. In response to detecting that a speculative instruction corresponding to a restoration mapping has been committed when that instruction or an older instruction still could potentially read a register, the register reserving circuitry indicates the physical register specifier of that restoration mapping as reserved.