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https://issues.apache.org/jira/browse/ARROW-536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15853982#comment-15853982
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Uwe L. Korn commented on ARROW-536:
-----------------------------------
The current code (as in ARROW-33) will compile and work on non-SSE4 system but
the {{popcnt}} instruction will only be used by the compiler if the flag
{{-msse4.2}} is provided. We would need rather two variants of specific
functions compiled, one with SSE4.2 instructions and one without. Loading the
correct one must be resolved at runtime.
> [C++] Provide non-SSE4 versions of functions that use CPU intrinsics for
> older processors
> -----------------------------------------------------------------------------------------
>
> Key: ARROW-536
> URL: https://issues.apache.org/jira/browse/ARROW-536
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
>
> follow up to discussion in patch for ARROW-33
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