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:
Mar. 22, 2011
Filed:
Oct. 13, 2008
Christopher Michael Abernathy, Austin, TX (US);
Jonathan James Dement, Austin, TX (US);
Ronald Hall, Cedar Park, TX (US);
Robert Alan Philhower, Valley Cottage, NY (US);
David Shippy, Austin, TX (US);
Christopher Michael Abernathy, Austin, TX (US);
Jonathan James DeMent, Austin, TX (US);
Ronald Hall, Cedar Park, TX (US);
Robert Alan Philhower, Valley Cottage, NY (US);
David Shippy, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Tracking the order of issued instructions using a counter is presented. In one embodiment, a saturating, decrementing counter is used. The counter is initialized to a value that corresponds to the processor's commit point. Instructions are issued from a first issue queue to one or more execution units and one or more second issue queues. After being issued by the first issue queue, the counter associated with each instruction is decremented during each instruction cycle until the instruction is executed by one of the execution units. Once the counter reaches zero it will be completed by the execution unit. If a flush condition occurs, instructions with counters equal to zero are maintained (i.e., not flushed or invalidated), while other instructions in the pipeline are invalidated based upon their counter values.