pitrou commented on issue #38560:
URL: https://github.com/apache/arrow/issues/38560#issuecomment-1966666606
After grepping through the xsimd include files, it seems that:
* the 128 bit (currently SSE4.2) variants can probably be migrated to
arch-agnostic xsimd code
* the 256 bit (currently AVX2) variants use `_mm256_unpack{lo,hi}_epi8` and
permutations in a non-trivial way that may be difficult to reproduce using xsimd
This means to we could at least migrate the 128 bit paths to xsimd, which
may get us NEON acceleration.
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