Boots – shoes – and leggings
Patent
1990-05-25
1991-04-16
Shaw, Dale M.
Boots, shoes, and leggings
G06F 752
Patent
active
050088505
ABSTRACT:
A circuit for multiplying two binary numbers including apparatus for sorting one of the binary numbers into groups of variable lengths, each group including all contiguous ones beginning at the lowest order bit and all continguous zeroes beginning with the highest order one of the group; apparatus for selecting for each group starting with the lowest order group of bits a binary number equal to the value of the other one of the binary numbers multiplied by a selected binary number consisting of ones; apparatus for shifting the selected number right a number of bits equal to the number of zeros in the group; apparatus for adding a next binary number equal to the value of the other one of the binary numbers multiplied by a selected binary number consisting of ones equal to the number of ones in an individual group to the partial product for each remaining group; apparatus for shifting the partial result of the addition right a number of bits equal to the number of zeroes in the each group after the addition of each selected number.
REFERENCES:
patent: 4864528 (1989-09-01), Nishiyama et al.
Blaauw et al., "Binary Multiplicatoin", IBM Tech. Discl. Bull., vol. 4, No. 11, Apr. 1962, pp. 32-34.
IBM Tech. Discl. Bull., vol. 27, No. 11, Apr. 1985, pp. 6624-6632, "Improved Approach to the Use of Booth's Multiplication Algorithm".
Mai Tan V.
Shaw Dale M.
Sun Microsystems Inc.
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