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Radix-4 square rot without initial PLA

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2 Author(s)
Ercegovac, M.D. ; Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA ; Lang, T.

A systematic derivation of a radix-4 square-root algorithm using redundant residual and result is presented. Unlike other similar schemes it does not use a table lookup or PLA for the initial step, resulting in a simpler implementation without any time penalty. The scheme can be integrated with division and incorporates an on-the-fly conversion and rounding of the result, thus eliminating a carry-propagate step to obtain the final result. The result-digit selection uses 3 bits of the result and 7 bits of the estimate of the residual

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Computers, IEEE Transactions on  (Volume:39 ,  Issue: 8 )