Comments on “Comments on `A systematic approach for design ofdigit serial signal processing architectures'”

摘要

In the above paper, [see ibid., vol. 47, p. 369-70, 2000] thenauthors have modified the nonrestoring square root algorithmn(Q=√A) and its architecture [see ibid., vol. 38, p.358-75, 1991]nto give correct results. They claimed that the partial remainder (PR)nshould be kept as is rather than eliminating its MSB at each step of thenalgorithm. Since two bits of A are appended to PR at each step of thenalgorithm, length of kth PR will be 2k rather than k+1 as in thenalgorithm of [1]. They also suggested that k of 0's to be appended tonthe left of the MSB of the radicand to keep its length as that of PR. Asna result, k-1 CAS cells are added to the kth row of the architecture. Innthis comment, it will be shown that most of the additional CAS cells arenredundant where only one added CAS cell per each row is enough toncompute the correct square root