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. 25, 1995
Filed:
Nov. 20, 1992
Hiroaki Fujii, Kokubunji, JP;
Naoki Hamanaka, Palo Alto, CA (US);
Teruo Tanaka, Hachoiji, JP;
Yasuhiro Inagami, Kodaira, JP;
Yoshiko Tamaki, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An arrangement having a register file having registers greater in number than those which are designated by an instruction, a pipeline ALU, a current window pointer and window number modifier operating in a register window mode, an element counter and address counter operating in a vector register mode, and register determining circuits for determining physical register numbers from the register numbers designated by an instruction in one of the two modes. Each register determining circuit has a first register determining circuit using an output of the window number modifier, for using the register file as a register window configuration, and a second register determining circuit using an output of the element counter, for using the register file as a vector register configuration. Physical registers of the register file are used as scalar registers in the register window mode, and used as vector registers in the vector register modes.