Method and apparatus for generating carry out signals

Details Method and apparatus for generating carry out signals Method and apparatus for generating carry out signals

1990-12-12

1993-08-10

Smith, Jerry

Boots, shoes, and leggings

G06F 750

Patent

active

052355390

ABSTRACT:
A circuit for determining the carry out from the addition of two numbers independent of the determination of the sum of the two numbers including apparatus for determining a first carry out from each bit position for a carry in of a first value, apparatus for determining a second carry out from each bit position for a carry in of a second value, a plurality of apparatus for utilizing the first and second carry out values from two or more adjacent bit positions to produce a first carry out from each plurality of bit positions for a carry in of a first value, and second carry out from each plurality of bit positions for a carry in of a second value, and apparatus for selecting between the first and second values based on the actual values of the carry ins.

REFERENCES:
patent: 4918642 (1990-04-01), Chang
patent: 4949297 (1990-08-01), Matsuoka
patent: 5043934 (1991-08-01), Lamb
Schmookle et al., IBM Technical Disclosure Bulletin, vol. 6, No. 1, Jun. 1963. (Group-Carry Generator).

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