Patent · US Active

Efficient forcing of corner cases in a floating point rounder

US8352531B2 · kind B2 · utility

2Cited by

23References

13Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Maarten J. Boersma · Holzgerlingen, DE
J. Adam Butts · Hartsdale, US
Silvia M. Mueller · Altdorf, DE
Jochen Preiss · Eppelheim, DE

Key dates

Filing date	Jul 22, 2008
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Nov 8, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F7/49947
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The forcing of the result or output of a rounder portion of a floating point processor occurs only in a fraction non-increment data path within the rounder and not in the fraction increment data path within the rounder. The fraction forcing is active on a corner case such as a disabled overflow exception. A disabled overflow exception may be detected by inspecting the normalized exponent. If a disabled overflow exception is detected, the round mode is selected to execute only in the non-increment data path thereby preventing the fraction increment data path from being selected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.