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:
Apr. 14, 2020
Filed:
Feb. 14, 2017
Applicant:
Arm Limited, Cambridge, GB;
Inventors:
Kauser Yakub Johar, Cambridge, GB;
Antony John Penton, Little Canfield, GB;
Assignee:
ARM Limited, Cambridge, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/38 (2018.01); G06F 9/30 (2018.01); G06F 9/32 (2018.01);
U.S. Cl.
CPC ...
G06F 9/3005 (2013.01); G06F 9/30054 (2013.01); G06F 9/324 (2013.01); G06F 9/3804 (2013.01); G06F 9/3806 (2013.01); G06F 9/3867 (2013.01);
Abstract
A data processing apparatus has prefetch circuitry for prefetching instructions from a data store into an instruction queue. Branch prediction circuitry is provided for predicting outcomes of branch instructions and the prefetch circuitry may prefetch instructions subsequent to the branch based on the predicted outcome. Instruction identifying circuitry identifies whether a given instruction prefetched from the data store is a predetermined type of program flow altering instruction and if so then controls the prefetch circuitry to halt prefetching of subsequent instructions into the instruction queue.