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:
Jul. 10, 1990
Filed:
Apr. 17, 1989
Applicant:
Inventors:
Jeffrey D Brown, Rochester, MN (US);
Donald L Freerksen, Rochester, MN (US);
Scott A Hilker, Rochester, MN (US);
Daniel L Stasiak, Rochester, MN (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364748 ; 364745 ;
Abstract
Apparatus for enhancing certain floating point arithmetic operations, by examining the initial operands and the exponent and fractional results and predicting when the steps of postnormalization and rounding can be skipped. The fraction result format enables a prediction of normalization and rounding under each of the addition, subtraction and multiplication possibilities, and under each of the various choices of rounding mode which are used in floating point arithmetic.