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https://issues.apache.org/jira/browse/LUCENE-3179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045662#comment-13045662
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Dawid Weiss commented on LUCENE-3179:
-------------------------------------
I think it's the 1.6 that adds these intrinsics -- I don't know if they've been
backported to updates to 1.5, but this should be relatively easy to verify
empirically.
> OpenBitSet.prevSetBit()
> -----------------------
>
> Key: LUCENE-3179
> URL: https://issues.apache.org/jira/browse/LUCENE-3179
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Paul Elschot
> Priority: Minor
> Fix For: 3.3
>
> Attachments: LUCENE-3179.patch
>
>
> Find a previous set bit in an OpenBitSet.
> Useful for parent testing in nested document query execution LUCENE-2454 .
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