8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI

[stooke]

I would like to backport JDK-8360934 to JDK25 as part of Post Quantum Cryptography support. While this is a performance enhancement, I feel that PQC needs to be as performant as possible to encourage adoption.

This is a clean, low-risk backport.

---

• I confirm that I make this contribution in accordance with the OpenJDK Interim AI Policy.

---

Progress

• JDK-8360934 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI (Enhancement - P5 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/643/head:pull/643
$ git checkout pull/643

Update a local copy of the PR:
$ git checkout pull/643
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/643/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 643

View PR using the GUI difftool:
$ git pr show -t 643

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/643.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back stooke! 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]

@stooke 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:

8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI

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 11 new commits pushed to the master branch:

• b0d5b7d: 8352565: Add native method implementation of Reference.get()
• 7ec1d5f: 8377991: TestLimitsUpdating.java fails with runtime exception even after JDK-8370492 is fixed
• 3b47a4e: 8368520: TLS 1.3 KeyUpdate fails with SunPKCS11 provider
• ... and 8 more: https://git.openjdk.org/jdk25u-dev/compare/567ecce0ecde55641a9b03ea4362802d9813f86e...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.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[jerboaa]

@stooke Please update the PR title to use Backport a0e6f028a8952f61d9115f7bdf04b8a87f8ebba4 so that this is appropriately recognized as a backport by the bots. Also, please undraft before requesting approval (next time).

[openjdk]

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

[mlbridge]

Webrevs

• 00: Full (a4e4dc1d)