Combined multiplier/shifter and method therefor

Details Combined multiplier/shifter and method therefor Combined multiplier/shifter and method therefor

1994-05-26

1995-07-25

Envall, Jr., Roy N.

Boots, shoes, and leggings

36471508, 364754, G06F 752, G06F 700

Patent

active

054368600

ABSTRACT:
A combined multiplier/shifter (150) uses an existing high-speed multiplier to perform both multiplies and programmable left and right shifts without a dedicated high-speed shifter. A shift decoder (160) used in a shift mode provides first recoded signals according to a shift count and a shift direction. A recoder (161) recodes a multiplier input in a multiply mode to provide second recoded signals. A multiplier array (163) receives either a multiplicand or a shift operand at its multiplicand input, and uses either the first or second recoded signals selectively according to the mode. An output of the multiplier array (163) is either a product in the multiply mode or a first shift result in the shift mode. An output shifter (157) selectively adjusts the first shift result according to the shift direction to provide a second, final shift result.

REFERENCES:
patent: 4031377 (1977-07-01), Deutsch et al.
patent: 4546446 (1985-10-01), Machida
patent: 4575812 (1986-03-01), Kloker et al.
patent: 4872128 (1989-10-01), Shimizu
patent: 4887232 (1989-12-01), Wolrich et al.
patent: 5099445 (1992-03-01), Studor et al.
patent: 5218564 (1993-06-01), Covey
patent: 5282153 (1994-01-01), Bartkowiak et al.
patent: 5309382 (1994-05-01), Tamura et al.
Motorola, Inc.; "DSP56116 Digital Signal Processor User's Manual;" Section 3; pp. 3-1- 14 (1990).

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