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:
Jun. 13, 1989
Filed:
Sep. 28, 1987
Applicant:
Inventors:
Takeji Tokumaru, Yokohama, JP;
Miyuki Nagata, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
36471508 ; 364900 ;
Abstract
Where an N-bit input data is rotated together with a carry bit by an N-bit or more rotate count, the actual rotate count is obtained as a remainder or modulo of x/N+1 (x: rotate count; N: data bit length). The above remainder will not be obtained by simply masking shift signals. Therefore, the remainder is calculated at high speed through hardware including a subtrahend calculator section for calculating (N+1) (i) (i=0, 1, 2, . . . ) and a subtracter section for calculating {x-(N+1) (i)} to obtain a modulo or a remainder representative of an actual rotate count.