Data processor performing operation on data having length shorte

Details Data processor performing operation on data having length shorte Data processor performing operation on data having length shorte

1989-03-10

1992-09-29

Fleming, Michael R.

Boots, shoes, and leggings

36426281, 3649515, 364DIG1, G06F 930

Patent

active

051519933

ABSTRACT:
A data processor for executing an instruction designating a half-word length operation or a quarter-word length operation in addition to one-word length operation is disclosed. This processor includes an operation unit performing an operation on data applied thereto and producing result data, a blocking register temporarily storing more significant bits data of a destination register, a first output circuit outputting less significant bits data of the result data when the half-word length operation or the quarter-word length operation is designated, and a second output circuit operatively outputting the data of the blocking register. The ouputs of the first and second circuits are then combined and written into the destination area.

REFERENCES:
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patent: 4272828 (1981-06-01), Negi et al.
patent: 4307445 (1981-12-01), Tredennick et al.
patent: 4488224 (1984-12-01), Ippolito et al.
patent: 4586130 (1986-04-01), Butts, Jr. et al.
patent: 4593267 (1986-06-01), Kuroda et al.
patent: 4785393 (1988-11-01), Chu et al.
patent: 4825355 (1989-04-01), Kurakazu et al.
patent: 4893235 (1990-01-01), Butts, Jr. et al.

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