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:
Jul. 12, 1988
Filed:
Jul. 29, 1987
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 371 16 ;
Abstract
A method and data processing system for validating prefetch instruction. The system includes an instruction unit, an n-stage pipeline which provides data segments representing instruction words from a memory to the instruction unit. The system further includes a circuit for prefetching instruction words to be executed subsequently to a presently executing instruction and a circuit for verifying the validity of the prefetched instruction word prior to execution thereof by the execution unit, and a circuit for causing the instruction unit to a fault condition only when the execution of an invalid instruction is begun.