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:
Nov. 02, 2010
Filed:
Sep. 06, 2006
Mikio Hondou, Kawasaki, JP;
Mikio Hondou, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A branch prediction apparatus reads out a branch history tableby an index calculated by the output of a branch history registercontaining a plurality of the latest branch result of a branch instruction. The branch prediction apparatus comprises frequency detection units-for detecting the appearance frequency of a branch instruction with a different address and data width modification unitsandfor modifying the number of valid bits of the branch history register, based on the detected appearance frequency. Even a program in which a branch result strongly depends on the latest branch history or even a program having a plenty of branch instructions can maintain high prediction accuracy with a small capacity of the branch history table.