Microprocessor having multiply/divide circuitry

Details Microprocessor having multiply/divide circuitry Microprocessor having multiply/divide circuitry

1978-09-25

1980-10-14

Malzahn, David H.

Boots, shoes, and leggings

G06F 754

Patent

active

042285186

ABSTRACT:
A microprocessor having the capability of performing either a multiply or divide operation from a single instruction for each operation is provided. Much of the standard circuitry of a microprocessor is used along with a multiply/divide cycle counter, logic circuitry, and a shift network separate from the arithmetic logic unit. The microprocessor has the capability of performing unsigned integer multiplication and division. A shift and add algorithm is used for multiplication while for division a non-restoring divide algorithm is used.

REFERENCES:
patent: 4065666 (1977-12-01), Wu
patent: 4086474 (1978-04-01), Negi et al.
Hanf, "Multiply-Divide", IBM Tech. Disclosure Bulletin, vol. 11, No. 6, Nov. 1968, pp. 658-660.
Dauby et al., "Half-Wired Multiplier", IBM Tech. Disclosure Bulletin, vol. 18, No. 10, Mar. 1976, pp. 3311-3312.

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