Data processing system for performing a shifting operation and a

Details Data processing system for performing a shifting operation and a Data processing system for performing a shifting operation and a

1991-05-03

1994-04-05

Bowler, Alyssa H.

Boots, shoes, and leggings

3642387, 3642386, 3642397, 3642398, 364240, 3642401, 3642405, 364242, 3642412, 364247, 364258, 3642595, 3642599, 3642628, 3642684, 3642651, 3642654, 364DIG1, 364DIG2, G06F 501, G06F 764, G06F 930, G06F 9315

Patent

active

053013450

ABSTRACT:
A data processing system (10) has a control selector (30) which has at least one conductor used for the common functions of shifting data and controling the generation of constants in an execution unit (26). A logic circuit (34) provides control signals to enable the control selector (30) to perform an information transfer, a shift operation, or a constant generation function. A plurality of constant signals enables a plurality of transistors (82, 114, 130, 84, 132, 86, 134) to generate a plurality of constant values. During an operation to shift data, a portion of the logic circuit (30) which generates a constant value is disabled by a Shift Disable signal. The conductors used to enable the control electrodes of the transistors during a constant generation function are used to shift data a predetermined number of bits when two shift signals are asserted.

REFERENCES:
patent: 4414622 (1983-11-01), Matsumoto
patent: 4414625 (1983-11-01), Miller
patent: 4415969 (1983-11-01), Bayliss et al.
patent: 4467444 (1984-08-01), Harmon, Jr. et al.
patent: 4785393 (1988-11-01), Chu et al.
patent: 4821187 (1989-04-01), Ueda et al.
patent: 4875160 (1989-10-01), Brow, III
patent: 4903231 (1990-02-01), Artieri
patent: 5023828 (1991-06-01), Grundmann et al.
patent: 5163120 (1992-11-01), Childers et al.

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