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https://issues.apache.org/jira/browse/IMPALA-12449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17766519#comment-17766519
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Michael Smith commented on IMPALA-12449:
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Joe and I are reviewing the change at https://gerrit.cloudera.org/c/19954/.
> SSE2NEON is slow compared to native NEON code
> ---------------------------------------------
>
> Key: IMPALA-12449
> URL: https://issues.apache.org/jira/browse/IMPALA-12449
> Project: IMPALA
> Issue Type: Bug
> Affects Versions: Impala 4.3.0
> Reporter: Sebastian Pop
> Assignee: Sebastian Pop
> Priority: Critical
> Fix For: Impala 4.3.0
>
>
> The port to arm64 uses https://github.com/DLTcollab/sse2neon an automatic
> tool to convert x86_64 intrinsics to arm64 NEON.
> As some of the x86_64 vector instructions do not have a one-to-one
> translation to NEON, the sse2neon translation tool falls back to a sequential
> emulation of the missing instructions.
> To avoid those slow paths, we need to adapt to NEON instructions all the
> code-paths with x86_64 intrinsics.
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