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Add support for Warp Shuffle-based reductions for arch >= 3.0 #750

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Add support for Warp Shuffle-based reductions for arch >= 3.0 #750

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Commits on Apr 25, 2017

  1. block wide reduction with multiple values to reduce at once

    @killeent
    killeent committed Apr 25, 2017
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  2. add function for determining the amount of smem required for a reduct… 

    …ion, in preparation for warp shuffle
    @killeent
    killeent committed Apr 25, 2017
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  3. move random functions to use reduce smem, round up to smem multiple o… 

    …f warp
    @killeent
    killeent committed Apr 25, 2017
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  4. use reduceSmemSize in reduceAll, round up to warpsize multiple thread… 

    …s in block
    @killeent
    killeent committed Apr 25, 2017
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  5. pass thcstate to reduceSmemSize

    @killeent
    killeent committed Apr 25, 2017
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  6. small changes to mode --> make sure we always have at least a warp # … 

    …of threads
    @killeent
    killeent committed Apr 25, 2017
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  7. small fix in nthreadlocal; add doc

    @killeent
    killeent committed Apr 25, 2017
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  8. implement warp shuffle based reduction; enable for arch >= 3.0

    @killeent
    killeent committed Apr 25, 2017
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  9. rebase

    @killeent
    killeent committed Apr 25, 2017
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  10. only first warp executes last stage of warp reduction

    @killeent
    killeent committed Apr 25, 2017
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