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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2021/03/02 16:27:00 UTC

[jira] [Created] (ARROW-11839) [C++] Rewrite bit-unpacking optimizations using xsimd

Antoine Pitrou created ARROW-11839:
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             Summary: [C++] Rewrite bit-unpacking optimizations using xsimd
                 Key: ARROW-11839
                 URL: https://issues.apache.org/jira/browse/ARROW-11839
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Antoine Pitrou
            Assignee: Antoine Pitrou


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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