Multiplier device with overflow detection function

Details Multiplier device with overflow detection function Multiplier device with overflow detection function

1993-08-10

1996-07-23

Mai, Tan V.

Boots, shoes, and leggings

36471504, 364745, 364759, C06F 700, C06F 738, C06F 752

Patent

active

055396852

ABSTRACT:
A multiplier device with an overflow detection function includes a multiplier register, a multiplicand register, a priority encoder, a shifter for shifting the output from the multiplicand register, in a specified direction according to a value output by the priority encoder, an addition result register for storing a result of an addition, an adder for adding the output from the shifter to the output from the addition result register, a mask pattern generator for outputting a predetermined mask pattern from a bit pattern output from the priority encoder, a logical product circuit for performing an AND operation on the mask pattern output from the mask pattern generator and the value output from the multiplicand register; and a OR circuit for performing an OR operation between the output from the logical product circuit and a carry component output from the adder.

REFERENCES:
patent: 4282581 (1981-08-01), Bondurant et al.
patent: 4700324 (1987-10-01), Doi et al.
patent: 4811268 (1989-03-01), Nishitani et al.
patent: 5138570 (1992-08-01), Argade

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