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:
Aug. 20, 1996
Filed:
Oct. 14, 1994
David T Matheny, Austin, TX (US);
Paul K Miller, Austin, TX (US);
Michael P Taborn, Austin, TX (US);
IBM Corporation, Armonk, NY (US);
Abstract
An apparatus for rounding an answer produced during the execution of an operation by a multiple stage execution pipeline includes first circuitry for detecting when the operation is iterative and accuracy bits associated with the answer to determine if a rounding calculation is required. When the first circuitry detects a rounding calculation is required, it sets a correction factor for the answer in accordance with a rounding mode and the detected accuracy. In a method practiced by the apparatus, the rounding an answer produced during the execution of an operation occurs through the steps of detecting, when the operation is iterative, accuracy bits associated with the answer to determine if a rounding calculation is required, and, when the rounding calculation is required, setting a correction factor for the answer in accordance with a rounding mode and the detected accuracy bits.