Patent · US Active

Range check based lookup tables

US8914431B2 · kind B2 · utility

3Cited by

5References

15Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Steven R. Carlough · Poughkeepsie, US
Klaus M. Kroener · Ehningen, DE
Christophe J. Layer · Eppelheim, DE
Silvia M. Mueller · Altdorf, DE
Kerstin Claudia Schelm · Stuttgart, DE

Key dates

Filing date	Jan 3, 2012
Grant date	Dec 16, 2014
Priority date	—
Expiry date	Feb 24, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG06F2207/5354
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Mechanisms for utilizing a reduced lookup table circuit to perform an operation in a data processing device are provided. A first input value is input for selecting a subset of values from the reduced lookup table circuit. The reduced lookup table circuit stores only boundary cell values from a fully filled lookup table corresponding to the reduced lookup table circuit. The subset of values comprises only a subset of boundary cell values corresponding to the first input value. A second value is input and a comparison, by the reduced lookup table circuit, of the second value to each of the boundary cell values in the subset of boundary cell values is performed. The reduced lookup table circuit outputs an output value based on results of the comparison of the second value to each of the boundary cell values in the subset of boundary cell values.

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