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:
Sep. 10, 2013
Filed:
Jun. 29, 2010
Mikio Hondou, Kawasaki, JP;
Mikio Hondou, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A processing unit computes a trigonometric function, for decrease the number of instructions and improve throughput. In a floating point multiply-add circuit, an OR circuit, a selector and an EOR circuit are disposed, and an expansion point and expansion function of the Taylor series expansion of the trigonometric function are computed using a first trigonometric function operation auxiliary instruction for defining the operation of rd=(rs*rs)|(rs[0]<<63) and a second trigonometric function operation auxiliary instruction for defining the operation of rd=((rs[0])? 1.0: rs)^(rs[1]<<63), or a third trigonometric function operation auxiliary instruction for defining the operation of rd=(rs*rs)|((˜rs[0]<<63) and a fourth trigonometric function operation auxiliary instruction for defining the operation of rd=((rs[0])? rs: 1.0)^((rs[1]^rs[0])<<63)).