Method and apparatus for rounding the result of an arithmetic op

Details Method and apparatus for rounding the result of an arithmetic op Method and apparatus for rounding the result of an arithmetic op

1994-10-14

1996-08-20

Mai, Tan V.

Boots, shoes, and leggings

364748, G06F 738

Patent

active

055485448

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.

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