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:
Apr. 24, 1990
Filed:
Jun. 28, 1985
Applicant:
Inventors:
Joni N Chan, Los Altos Hills, CA (US);
Andrew Moy, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 19 ; 371 161 ; 364200 ;
Abstract
A global label (path identifier) is stored at compile time which computes a check marker along one permissible execution path of execution of a microinstruction sequence. The remaining execution paths are embedded with scalars and skip microinstructions so that execution along any conditional branch path will always yield the same global label (path identifier). Microcode sequence errors are determined at the completion of each microprogram node execution by comparing a path identifier generated at runtime with the global label stored earlier.