8307495: Specialize atomic bitset functions for aix-ppc

[dbriemann]

This pull request contains a backport of commit c9cbd31f from the openjdk/jdk repository.

The commit being backported was authored by David Briemann on 15 Oct 2025 and was reviewed by Martin Doerr and Richard Reingruber.

A merge conflict was resolved, that was created by renaming files: JDK-8367486

Second commit resolves another renaming issue caused by JDK-8367014.

Otherwise the backport is clean.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• JDK-8307495 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8307495: Specialize atomic bitset functions for aix-ppc (Enhancement - P4 - Approved)

Reviewers

• Martin Doerr (@TheRealMDoerr - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/24/head:pull/24
$ git checkout pull/24

Update a local copy of the PR:
$ git checkout pull/24
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/24/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 24

View PR using the GUI difftool:
$ git pr show -t 24

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/24.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back dbriemann! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@dbriemann This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8307495: Specialize atomic bitset functions for aix-ppc

Reviewed-by: mdoerr

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 18 new commits pushed to the master branch:

• 78317c6: 8370197: Add missing @OverRide annotations in com.sun.beans package
• c039148: 8369050: DecimalFormat Rounding Errors for Fractional Ties Near Zero
• 3da6223: 8357570: [macOS] os::Bsd::available_memory() might return too low values
• ... and 15 more: https://git.openjdk.org/jdk25u-dev/compare/796f2b42b07c150602acc98fe1a9ad69c5bc5d0d...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@TheRealMDoerr) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 01: Full - Incremental (78d202eb)
• 00: Full (d34d45ce)

[TheRealMDoerr]

Backport looks correct. Thanks!

[openjdk]

⚠️ @dbriemann This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.