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:
Sep. 06, 1994
Filed:
May. 29, 1992
Applicant:
Inventors:
Tatsuya Yokoyama, Machida, JP;
Tetsuhiko Hirata, Machida, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364746 ;
Abstract
An arithmetic-logic unit ALU having three data input ports A, B and C, a modulo adder/subtracter for executing an arithmetic-logic operation of (A.+-.B) mod (C+1), a comparator for determining whether the input data A, B and C satisfy at least one of the relationship of A.ltoreq.B.ltoreq., A.ltoreq.B<C, A<B.ltoreq.C and A<B<C from a modulo operation viewpoint, and outputting a comparison judgment signal, a two-input ALU for executing an arithmetic-logic operation of two data, and one data output port for outputting operation results.