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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