Appeal No. 1999-0263
Application No. 08/517,902
term is looked up in a first lookup table, wherein the
estimated reciprocal term corresponds to a first portion of
the operand, an error term is looked up in a second lookup
table, wherein the error term corresponds to a second
portion of the operand, and the reciprocal is generated
from the estimated reciprocal term and the error term.
Representative independent claim 1 is reproduced as
follows:
1. A method of computing a reciprocal of an operand
comprising the steps of:
a) looking up an estimated reciprocal term in a
first lookup table, wherein the estimated
reciprocal term corresponds to at least a first
portion of the operand;
b) looking up an error term in a second lookup
table, wherein the error term corresponds to at
least a second portion of the operand; and
c) generating the reciprocal from the estimated
reciprocal term and the error term.
The examiner relies on the following reference:
Yamaguchi 5,012,438 Apr. 30, 1991
2
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