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:
Oct. 14, 2014
Filed:
Dec. 22, 2010
Iwao Yamazaki, Kawasaki, JP;
Iwao Yamazaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A cache unit comprising a register file that selects an entry indicated by a cache index of n bits (n is a natural number) that is used to search for an instruction cache tag, using multiplexer groups having n stages respectively corresponding to the n bits of the cache index. Among the multiplexer groups having n stages, a multiplexer group in an mstage has 2multiplex circuits. The multiplexer group in the mstage uses a value of an mbit (m is a natural number equal to or less than n) from the least significant bit in the cache index as a control signal. The multiplexer group in the mstage switches all multiplex circuits included in the multiplexer group in the mstage in accordance with the control signal.