Data processing system having apparatus for increasing the execu

Details Data processing system having apparatus for increasing the execu Data processing system having apparatus for increasing the execu

1987-08-20

1990-07-10

Williams, Jr., Archie E.

Boots, shoes, and leggings

3642523, 3642526, 3642549, 3642551, 3642554, 3642555, 3642624, 3642628, 3642598, 3642462, G06F 930, G06F 9308, G06F 9355, G06F 1204

Patent

active

049410857

ABSTRACT:
In addition to an ordinary bit field instruction without limitation which makes use of an offset value and a field width, a bit field instruction with limitation which does not calculate the spread of the bit field is separately installed. In the present invention the calculation for determination of the spread of the bit field is not performed when the bit field instruction with limitation is executed. In addition, when executing a bit field instruction with limitation, the offset value and the field width can be obtained directly as immediate values thereby decreasing the execution time of the instruction.

REFERENCES:
patent: 3680058 (1972-07-01), DeSantis et al.
patent: 4103329 (1978-07-01), Davis et al.
patent: 4109310 (1978-08-01), England et al.
patent: 4272828 (1981-06-01), Negi et al.
patent: 4466056 (1984-08-01), Tanahashi

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