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. 24, 1998
Filed:
Sep. 18, 1995
Kevin Arthur Chiarot, Pflugerville, TX (US);
Michael John Mayfield, Austin, TX (US);
Era Kasturia Nangia, Austin, TX (US);
Milford John Peterson, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for selectively pre-fetching Line M+1 into an L1 instruction cache from an L2 cache or from main memory during the execution of Line M. If unresolved branches exist in pending Line M, Line M+1 is speculative and may be pre-fetched into L1 instruction cache only from L2 cache, not from main memory. Unresolved branches in pending Line M are resolved before Line M+1 is pre-fetched from main memory. If no unresolved branches exist, Line M is committed ('inevitable-speculative') and is pre-fetched from main memory. In this way, no potentially wasteful pre-fetches are performed and main memory bandwidth is preserved.