[jira] [Updated] (LUCENE-9636) Exact and operation to get a SIMD optimize

["Michael McCandless (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-9636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-9636:
---------------------------------------
    Fix Version/s: 8.8
                   master (9.0)

> 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
>             Fix For: master (9.0), 8.8
>
>          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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