The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1991
Filed:
Dec. 20, 1990
Applicant:
Inventor:
Miyuki Nagata, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
395375 ; 3642549 ; 364D / ;
Abstract
A data processor having an inner instruction register, a microinstruction register, and microinstruction decoder for decoding the microinstruction stored in the microinstruction register, and a data expansion section for expanding data bits stored in source and destination registers among general purpose registers when designated by an inner instruction in which the bit lengths of data to be processed can be designated by an inner instruction, a microinstruction for performing the operation of data having same contents but different bit lengths can be made common, thereby reducing the number of steps of the microprograms.