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. 29, 1997
Filed:
May. 31, 1995
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to allow prefetching of pointer-type data structure, an instruction word of load instruction has pointer hints indicating that the data being loaded by the instruction comprises a pointer specifying the address of the next data. When a CPU executes such an instruction, and the data requested by that instruction is loaded from a main memory, a prefetch circuit in a memory interface circuit uses this pointer to read a block containing the data specified by this pointer from the main memory, then stores temporarily in a prefetch buffer provided therein. When CPU executes a load instruction requesting reading of the data specified by this pointer, the data in this stored block is supplied to CPU through a processor interface circuit and a cache control circuit.