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.

Date of Patent:
Apr. 24, 2018

Filed:

Feb. 01, 2016
Applicant:

International Business Machines Corporation, Armonk, NY (US);

Inventors:

Michael Klein, Schoenaich, DE;

Klaus M. Kroener, Ehningen, DE;

Cédric Lichtenau, Stuttgart, DE;

Silvia Melitta Mueller, Altdorf, DE;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/485 (2006.01); G06F 7/487 (2006.01); G06F 7/483 (2006.01); G06F 7/544 (2006.01); G06F 5/01 (2006.01);
U.S. Cl.
CPC ...
G06F 7/4876 (2013.01); G06F 5/01 (2013.01); G06F 5/012 (2013.01); G06F 7/483 (2013.01); G06F 7/485 (2013.01); G06F 7/5443 (2013.01); G06F 2207/483 (2013.01);
Abstract

A binary fused multiply-add floating-point unit configured to operate on an addend, a multiplier, and a multiplicand. The unit is configured to receive as the addend an unrounded result of a prior operation executed in the unit via an early result feedback path; to perform an alignment shift of the unrounded addend on an unrounded exponent and an unrounded mantissa; as well as perform a rounding correction for the addend in parallel to the actual alignment shift, responsive to a rounding-up signal.


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