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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.:

US 12223290 B1

PDFFull Text
Date of Patent:
Feb. 11, 2025

Filed:

Jun. 21, 2023

Decimal floating-point instruction in a round-for-reround mode

Applicant:

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

Inventors:

Eric Mark Schwarz, Gardiner, NY (US);

Martin Stanley Schmookler, Austin, TX (US);

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);

Attorneys:

Jeffrey Ingalls, Esq.

Blanche E. Schiller, Esq.

Heslin Rothenberg Farley & Mesiti P.C.

Primary Examiner:

Michael D Yaary

Int. Cl.
CPC ...
G06F 7/499 (2006.01); G06F 7/38 (2006.01); G06F 7/483 (2006.01); G06F 7/491 (2006.01); G06F 9/30 (2018.01); G06F 17/10 (2006.01);
U.S. Cl.
CPC ...
G06F 7/49957 (2013.01); G06F 7/386 (2013.01); G06F 7/483 (2013.01); G06F 7/491 (2013.01); G06F 7/49915 (2013.01); G06F 7/49963 (2013.01); G06F 7/49968 (2013.01); G06F 7/49973 (2013.01); G06F 7/49978 (2013.01); G06F 7/49984 (2013.01); G06F 9/30014 (2013.01); G06F 17/10 (2013.01); G06F 7/49947 (2013.01);
Abstract

A decimal floating-point instruction is executed in a round-for-reround mode. The decimal floating-point instruction is configured to perform a decimal floating-point operation on a decimal floating-point operand. The executing includes forming based on performing the decimal floating-point operation, an intermediate result having a high order portion and a low order portion. The high order portion has a least significant digit. A rounded-for-reround number is created from the intermediate result. The rounded-for-reround number includes the high order portion of the intermediate result and based on the least significant coefficient digit of the high order portion being a selected value and based on the low order portion having another selected value, the least significant digit of the rounded-for-reround number is incremented. The rounded-for-reround number is stored.

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