
doi: 10.1109/12.863046
The aim of this paper is to accelerate division, square root, and square root reciprocal computations when the Goldschmidt method is used on a pipelined multiplier. This is done by replacing the last iteration by the addition of a correcting term that can be looked up during the early iterations. We describe several variants of the Goldschmidt algorithm, assuming 4-cycle pipelined multiplier, and discuss obtained number of cycles and error achieved. Extensions to other than 4-cycle multipliers are given. If we call G/sub m/ the Goldschmidt algorithm with m iterations, our variants allow us to reach an accuracy that is between that of G/sub 3/ and that of G/sub 4/, with a number of cycle equal to that of G/sub 3/.
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