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

1990-01-02

1993-05-11

Lee, Thomas C.

Boots, shoes, and leggings

395800, 395425, 364DIG1, 3642523, 3642526, 3642549, 3642551, 3642554, G06F 930, G06F 9308

Patent

active

052108350

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), De Santis et al.
patent: 3735363 (1973-05-01), Beers et al.
patent: 4103329 (1978-07-01), Davis et al.
patent: 4520439 (1985-05-01), Liepa
patent: 4785393 (1988-11-01), Chu et al.
patent: 4941085 (1990-07-01), Sakamura et al.

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