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. 17, 1985
Filed:
Apr. 28, 1982
Applicant:
Inventor:
Dwight D Hill, Holmdel, NJ (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364200 ;
Abstract
Disclosed is a method and an apparatus for range checking a value in a programmable system. An instruction prefix LDRNG enables the checking of a value against one or both limits of a range of values. The value is calculated as part of the execution of a primary instruction which is any suitable instruction, such as ADD, MOVE, STORE, etc., that directly follows the prefix. During the execution of the primary instruction the range check is performed, and an exception is taken without completing execution of the primary instruction if the value does not lie within the range.