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:
Nov. 18, 2008
Filed:
Dec. 17, 2002
Yuki Kondoh, Kokubunji, JP;
Yuki Kondoh, Kokubunji, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A processor and its arithmetic instruction processing method and arithmetic operation control method are disclosed that add a new operand designation option to SIMD arithmetic instructions and permit software pipelining between arithmetic operations performed in parallel by a SIMD arithmetic unit. A selector for adding an operation for interchanging multiple outputs of a SIMD arithmetic unit is added to a data path. A register file is divided in accordance with the output bit fields of the SIMD arithmetic unit. A means of specifying multiple registers as a SIMD instruction's output operand is added. Therefore, part of the output results of arithmetic operations performed in parallel by the SIMD arithmetic unit can be stored in a register providing the input for another arithmetic operation. Software pipelining is rendered achievable in this manner.