In a data processor an SRT divider having a negative divisor sti

Details In a data processor an SRT divider having a negative divisor sti In a data processor an SRT divider having a negative divisor sti

1992-06-01

1993-08-17

Mai, Tan V.

Boots, shoes, and leggings

G06F 752

Patent

active

052375250

ABSTRACT:
In a data processor an Sweeney-Robertson-Tocher (SRT) divider is provided having a negative divisor sticky detection circuit. The negative divisor sticky detection circuit allows negative sticky correction to occur in the SRT divider without requiring additional iteration cycles. At the conclusion of iterative cycles of a divide operation, a final remainder is formed and stored in a latch in the SRT divider. The negative divisor sticky detection circuit determines whether a negative final remainder is equal in magnitude to a divisor value by bit-wise XORing the final remainder with the two's complement value of a divisor, immediately before sticky logic detects the negative sticky bit. The final sticky value is obtained by logically combining the negative sticky bit with a positive sticky bit computed by a positive divisor sticky detection circuit.

REFERENCES:
patent: 3733477 (1973-05-01), Tate et al.
patent: 4979142 (1980-12-01), Allen et al.
patent: 5103420 (1992-04-01), Avnon et al.
patent: 5128891 (1992-07-01), Lynch et al.

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