UNANIMOUS BRANCH INSTRUCTIONS IN A PARALLEL THREAD PROCESSOR

One embodiment of the present invention sets forth a mechanism for managing thread divergence in a thread group executing a multithreaded processor. A unanimous branch instruction, when executed, causes all the active threads in the thread group to branch only when each thread in the thread group ag...

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Main Authors JOHNSON, RICHARD, CRAIG, ROZAS, GUILLERMO, JUAN, NICKOLLS, JOHN, R, GLANVILLE, ROBERT, STEVEN
Format Patent
LanguageEnglish
French
German
Published 02.04.2014
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:One embodiment of the present invention sets forth a mechanism for managing thread divergence in a thread group executing a multithreaded processor. A unanimous branch instruction, when executed, causes all the active threads in the thread group to branch only when each thread in the thread group agrees to take the branch. In such a manner, thread divergence is eliminated. A branch-any instruction, when executed, causes all the active threads in the thread group to branch when at least one thread in the thread group agrees to take the branch.
Bibliography:Application Number: EP20100819515