domibel opened a new pull request, #50547:
URL: https://github.com/apache/arrow/pull/50547
### Rationale for this change
Building with ARROW_SIMD_LEVEL=NONE and ARROW_RUNTIME_SIMD_LEVEL=MAX failed
with:
bpacking.cc:39:49: error: 'unpack_sse4_2' is not a member of
'arrow::internal::bpacking'
The SSE4.2 dispatch table entries are emitted when either the compile-time
or the runtime macro is set, but the kernels themselves were only compiled when
the compile-time macro was set.
### What changes are included in this PR?
I moved the byte_stream_split SSE4.2 instantiations into a dedicated
translation unit, keeping the dispatcher's own unit at the baseline ISA.
### Are these changes tested?
Yes
### Are there any user-facing changes?
No
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