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:
May. 22, 2007
Filed:
Aug. 16, 2002
G. William Walster, Cupertino, CA (US);
Eldon R. Hansen, Los Altos, CA (US);
G. William Walster, Cupertino, CA (US);
Eldon R. Hansen, Los Altos, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
One embodiment of the present invention provides a system that facilitates performing exception-free arithmetic operations within a computer system. During execution of a computer program, the system receives an instruction to perform an arithmetic operation that involves manipulating floating-point values. If the arithmetic operation manipulates a floating-point value representing {+0}, the arithmetic operation is performed in a manner consistent with {+0} representing a set containing a single value '−0', wherein '−0' is the limit of a sequence of values that approaches zero only from above. Similarly, if the arithmetic operation manipulates a floating-point value representing {−0}, the arithmetic operation is performed in a manner consistent with {−0} representing a set containing a single value “+0”, wherein “+0” is the limit of a sequence of values that approaches zero only from below.