Range check based lookup tables

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United States of America Patent

PATENT NO 8914431
SERIAL NO

13342232

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
INTERNATIONAL BUSINESS MACHINES CORPORATIONNEW ORCHARD ROAD ARMONK NY 10504

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carlough, Steven R Wappingers Falls, US 161 863
Kroener, Klaus M Ehningen, DE 19 56
Layer, Christophe J Beoblingen, DE 12 39
Mueller, Silvia Melitta Altdorf, DE 85 330
Schelm, Kerstin Stuttgart, DE 16 135

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