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. 03, 2020
Filed:
Jan. 09, 2019
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Kenichi Kitamura, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
An arithmetic processing device includes a coefficient memory storing coefficients of a Taylor series expansion of a trigonometric function, a multiply-add arithmetic unit, a first bypass path supplying an output of the multiply-add arithmetic unit to a register file, an OR circuit calculating OR of a sign bit of the output of the multiply-add arithmetic unit and a least significant bit of a second input, a first selector selecting either a first input y or a value '1.0' an EOR circuit calculating an EOR of a first bit of the second input and a sign bit of an output of the first selector, and a second bypass path supplying the least significant bit of the second input to a coefficient selector. The multiply-add arithmetic unit executes an auxiliary instruction repeatedly while modifying a coefficient index from a maximum value to a minimum value to calculate sin (x).