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:
May. 09, 2017
Filed:
Oct. 31, 2012
Arm Limited, Cambridge, GB;
Vladimir Vasekin, Cambridge, GB;
Allan John Skillman, Cambridge, GB;
Chiloda Ashan Senerath Pathirane, Cambridge, GB;
Jean-Baptiste Brelot, Cambridge, GB;
ARM Limited, Cambridge, GB;
Abstract
An integrated circuit incorporates prefetch circuitry for prefetching program instructions from a memory. The prefetch circuitry includes a branch target address cache. The branch target address cache stores data indicative of branch target addresses of previously encountered branch instructions fetched from the memory. For each previously encountered branch instructions, the branch target address cache stores a tag value indicative of a fetch address of that previously encountered branch instruction. The tag values stored are generated by tag value generating circuitry which performs a hashing function upon a portion of the fetch address such that the tag value has a bit length less than the bit length of the portion of the fetch address concerned.