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:
Sep. 26, 1995
Filed:
Oct. 23, 1992
Susumu Narita, Kokubunji, JP;
Fumio Arakawa, Tokyo, JP;
Kunio Uchiyama, Kodaira, JP;
Hirokazu Aoki, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An address of a branch instruction, a branch target address thereof, and a type thereof are stored as branch history information in a branch instruction buffer. In addition, a return address for a return from a subroutine is retained in a return buffer. A look-up operation is conducted through the buffer by using the pre-fetch address such that when a hit occurs, a branch target address is output from the buffer depending on a branch instruction type. Consequently, the branch processing is achieved at a high speed. Particularly, the processing speed of an unconditional branch instruction containing a return instruction is increased.