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  1. Apache Arrow
  2. ARROW-11839

[C++] Rewrite bit-unpacking optimizations using xsimd

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Details

    • Improvement
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • None
    • 4.0.0
    • C++

    Description

      Currently, unpacking of fixed-size bit bundles uses custom generated code with SIMD intrinsics (the bpacking files in src/arrow/util).

      By leveraging xsimd, we can make the SIMD generated code more generic (e.g. the 256-bit generated code would be able to compile with any 256-bit SIMD ISA supported by xsimd).

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              apitrou Antoine Pitrou
              apitrou Antoine Pitrou
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