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:
Jul. 17, 2007
Filed:
Feb. 20, 2003
Yuji Shirahige, Kawasaki, JP;
Tsuyoshi Motokurumada, Kawasaki, JP;
Masaki Ukai, Kawasaki, JP;
Aiichiro Inoue, Kawasaki, JP;
Yuji Shirahige, Kawasaki, JP;
Tsuyoshi Motokurumada, Kawasaki, JP;
Masaki Ukai, Kawasaki, JP;
Aiichiro Inoue, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention realizes pre-fetch based on a high-accuracy prediction. A plurality of address values are registered in advance in a pre-fetch address queue, based on previous memory accesses. If a request address from the processor unit of a request address register matches this address value, a pre-fetch address obtained by adding a block size to the request address is output to a secondary cache as a pre-fetch request. This pre-fetch address is written back into the pre-fetch address queue.