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. 09, 2021
Filed:
Apr. 26, 2019
Applicant:
Graphcore Limited, Bristol, GB;
Inventors:
Alan Graham Alexander, Wotton-Under-Edge, GB;
Edward Andrews, Bristol, GB;
Stephen Felix, Bristol, GB;
Mrudula Chidambar Gore, Bath, GB;
Assignee:
Graphcore Limited, Bristol, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/499 (2006.01); G06F 9/30 (2018.01);
U.S. Cl.
CPC ...
G06F 7/49915 (2013.01); G06F 7/49994 (2013.01); G06F 9/3001 (2013.01); G06F 9/30123 (2013.01);
Abstract
A method and apparatus for handling overflow conditions resulting from arithmetic operations involving floating point numbers. An indication is stored as part of a thread's context indicating one of two possible modes for handling overflow conditions. In a first mode, a result of an arithmetic operation is set to the limit representable in the floating point format. In a second mode, a result of an arithmetic operation is set to a NaN.