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Fix block radix rank for blocks with non multiple of 32 threads #564
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miscco
approved these changes
Aug 31, 2022
alliepiper
approved these changes
Aug 31, 2022
| RankAlgorithm == cub::RadixRankAlgorithm::RADIX_RANK_MATCH_EARLY_COUNTS_ANY || | ||
| RankAlgorithm == cub::RadixRankAlgorithm::RADIX_RANK_MATCH_EARLY_COUNTS_ATOMIC_OR; | ||
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| if (uses_warp_striped_arrangement) |
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CUB_IF_CONSTEXPR
(in <cub/detail/cpp_compatibility.cuh>)
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Since it's a test that's probably optimized by nvcc in any way, I don't see a reason to deteriorate readability. Is there anything I'm missing?
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I'm going to merge the PR. If there's a reason to change this, please let me know and I'll update the code in a follow up PR.
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Some compilers will issue a warning when a constant conditional is evaluated in a regular if (...). We should be using the if constexpr macros in public headers for these cases. Since this is just a test, we can fix it later if it becomes an issue.
| cub::BFEDigitExtractor<Key> extractor(0, RadixBits); | ||
| block_radix_rank(temp_storage).RankKeys(keys, ranks, extractor); | ||
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| if (uses_warp_striped_arrangement) |
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This PR addresses the following issue by masking inactive threads in match any. The code generation hasn't changed for thread blocks with
(BlockThreads % 32) = 0.