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. 02, 2003
Filed:
Jun. 22, 2000
Adam R. Talcott, San Jose, CA (US);
Daniel L. Liebholz, Cambridge, MA (US);
Sanjay Patel, Fremont, CA (US);
Richard H. Larson, Los Gatos, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A method of handling an exception in a processor includes setting a state upon detection of an exception, signaling a trap for the exception if the state is set, and based on a class of the exception, processing the exception differently before signaling the trap. The method may include replaying an instruction causing the exception before signaling the trap for the exception based on the class of the exception. The method may include replaying the instruction causing the exception after the instruction causing the exception becomes an oldest, unretired instruction. The method may include signaling the trap for the exception after an instruction causing the exception becomes an oldest, unretired instruction. The method may include marking an instruction causing the exception as complete without issuing the instruction causing the exception. An apparatus for handling exceptions in a processor includes an instruction scheduler for setting a state upon detection of an exception and signaling a trap for the exception if the state is set. The instruction scheduler, based on a class of the exception, processes the exception differently before signaling the trap.