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. 28, 2009
Filed:
Jan. 30, 2004
Norman Rubin, Cambridge, MA (US);
Richard Bagley, Arlington, MA (US);
Norman Rubin, Cambridge, MA (US);
Richard Bagley, Arlington, MA (US);
ATI Technologies, Inc., Markham, ON, CA;
Abstract
A method and apparatus for superword register value numbering includes hashing an operation code and the value numbers of a plurality of sources to generate a flint hash value. The method and apparatus further includes retrieving an operation value number from the first hash table based on the first hash value. The method and apparatus further includes generating a result value number based on a previous bit hash value and the operation value number. The result value number is a combination of the operation value numbers for each component having a live indicator (e.g., a false write mask value) and a previous value numbers for the components without the live indicator (e.g., a true write mask value). Thereupon, the method and apparatus includes searching a second hash table using the result value number. As such, the method and apparatus provides using two separate hash tables for value numbering with superword instructions.