Predetermination of result conditions of decimal operations

Details Predetermination of result conditions of decimal operations Predetermination of result conditions of decimal operations

1988-12-28

1989-12-26

Clark, David L.

Boots, shoes, and leggings

G06F 1500

Patent

active

048902535

ABSTRACT:
An apparatus is provided which tests the magnitude and sign digits of packed decimal binary numbers during performance of arithmetic operations which combine the numbers for the purpose of setting status bits used for setting condition codes, determining execution paths, setting the sign of the result and detecting invalid conditions.

REFERENCES:
patent: 4086474 (1978-04-01), Negi et al.
patent: 4229801 (1980-10-01), Whipple
patent: 4288850 (1981-09-01), Kindell et al.
patent: 4320464 (1982-03-01), Desmonds
patent: 4460970 (1984-07-01), McClary
patent: 4608660 (1986-08-01), Hasebe
patent: 4761756 (1988-08-01), Lee et al.
patent: 4785393 (1988-11-01), Chu et al.

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