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

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killeent wants to merge 10 commits into

torch:masterfrom

killeent:min-smem

Commits on Apr 25, 2017

block wide reduction with multiple values to reduce at once
killeent
committed
23e7187
add function for determining the amount of smem required for a reduction, in preparation for warp shuffle
killeent
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2592252
move random functions to use reduce smem, round up to smem multiple of warp
killeent
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e09788f
use reduceSmemSize in reduceAll, round up to warpsize multiple threads in block
killeent
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c2717fe
pass thcstate to reduceSmemSize
killeent
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abbdfc5
small changes to mode --> make sure we always have at least a warp # of threads
killeent
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c7e8c90
small fix in nthreadlocal; add doc
killeent
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720d24a
implement warp shuffle based reduction; enable for arch >= 3.0
killeent
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875601f
rebase
killeent
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28cb961
only first warp executes last stage of warp reduction
killeent
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576ae9f