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:
Jun. 01, 2010
Filed:
Aug. 11, 2004
James N. Dieffenderfer, Apex, NC (US);
Nathan S. Nunamaker, Durham, NC (US);
Sanjay B. Patel, Cary, NC (US);
James N. Dieffenderfer, Apex, NC (US);
Nathan S. Nunamaker, Durham, NC (US);
Sanjay B. Patel, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for avoiding various hazards for instructions which are propagating through a microprocessor pipeline. When a plurality of instructions exist within the pipeline which read and write the same value, a vector is established to distinguish the older from the newer instructions. Further, before instructions are dispatched for execution, pointers are generated which identify the particular instruction which had the operand or parameter value needed. Accordingly, by monitoring both the recent vector and pointers, dated dependency hazards can be avoided.