Apparatus for determining sticky bit value in arithmetic operati

Details Apparatus for determining sticky bit value in arithmetic operati Apparatus for determining sticky bit value in arithmetic operati

1991-12-30

1993-08-03

Walsh, Donald P.

Boots, shoes, and leggings

364745, G06F 738

Patent

active

H00012220

ABSTRACT:
An apparatus for determining the correct value to be assigned to the "sticky-bit" (S) position as a consequence of an arithmetic floating point multiply, divide or square root operation. The apparatus measures the number of trailing zeroes in the operand registers, performs a sum or difference calculation of these values, and compares the result with a third value to determine the sticky-bit value.

REFERENCES:
patent: 4488247 (1984-12-01), Inagami et al.
patent: 4639887 (1987-01-01), Farmwald
patent: 4758972 (1988-07-01), Frazier
patent: 4928259 (1990-05-01), Galbi et al.
patent: 4994996 (1991-02-01), Fossum et al.
patent: 5128889 (1992-07-01), Nakano

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