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:
Jan. 14, 1997
Filed:
Dec. 21, 1993
Tsukasa Matoba, Kawasaki, JP;
Hiroyuki Satou, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An instruction cache and a data cache are formed with a 2-port structure, the first port of the instruction cache is exclusively used for readout of the contiguous instruction, and the second port thereof is exclusively used for readout of the branched instruction when the conditional branch instruction is executed. With this construction, two instructions which may be executed can be simultaneously fetched irrespective of whether the branch of the conditional branch instruction is taken or untaken, thereby making it possible to enhance the CPU performance. Further, in the 2-port data cache, time for the cache refill process can be reduced by means of the contiguous data transfer and non-cacheable access.