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https://issues.apache.org/jira/browse/LUCENE-9636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17280337#comment-17280337
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Michael McCandless commented on LUCENE-9636:
--------------------------------------------
Looks like this was fixed in Lucene 8.8.0 (from looking @ CHANGES.txt) – I'll
add Fix Version. Thanks [~gf2121]!
> Exact and operation to get a SIMD optimize
> ------------------------------------------
>
> Key: LUCENE-9636
> URL: https://issues.apache.org/jira/browse/LUCENE-9636
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/codecs
> Reporter: Feng Guo
> Priority: Trivial
> Time Spent: 40m
> Remaining Estimate: 0h
>
> In decode6(), decode7(), decode14(), decode15(), decode24() longs always `&`
> a same mask and do some shift. By printing assemble language, i find that JIT
> did not optimize them with SIMD instructions. But when we extract all `&`
> operations and do them first, JIT will use SIMD optimize on them.
>
>
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