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US Patent 7634637 Execution of parallel groups of threads with per-instruction serialization

Patent 7634637 was granted and assigned to Nvidia on December, 2009 by the United States Patent and Trademark Office.

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Patent
Patent

Patent attributes

Current Assignee
NVIDIA
NVIDIA
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7634637
Date of Patent
December 15, 2009
Patent Application Number
11305803
Date Filed
December 16, 2005
Patent Citations Received
‌
US Patent 11656875 Method and system for instruction block to execution unit grouping
3
Patent Primary Examiner
‌
David J. Huisman
Patent abstract

In a processor, a SIMD group (a group of threads for which instructions are issued in parallel using single instruction, multiple data instruction issue techniques) is logically divided into two or more “SIMD subsets,” each containing one or more of the threads in the SIMD group. Each SIMD subset is associated with a different instance of a variable state parameter. The processor determines which of the instructions to be executed for the SIMD group rely on the state variable and serializes execution of such instructions so that the instruction is executed separately for each SIMD subset. Instructions that do not rely on the state variable are advantageously not serialized.

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