8315612: RISC-V: intrinsic for unsignedMultiplyHigh

[VladimirKempik]

Hi all,

This pull request contains a backport of commit 5d3fdc17 from the openjdk/jdk repository.

The commit being backported was authored by Vladimir Kempik on 6 Sep 2023 and was reviewed by Fei Yang.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8315612 needs maintainer approval

Issue

• JDK-8315612: RISC-V: intrinsic for unsignedMultiplyHigh (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u.git pull/139/head:pull/139
$ git checkout pull/139

Update a local copy of the PR:
$ git checkout pull/139
$ git pull https://git.openjdk.org/jdk21u.git pull/139/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 139

View PR using the GUI difftool:
$ git pr show -t 139

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u/pull/139.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back vkempik! 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]

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

[openjdk]

⚠️ @VladimirKempik 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.

[mlbridge]

Webrevs

• 00: Full (f9f39d8a)

[VladimirKempik]

/approval request I would like to backport this to jdk21u, risc-v only change to C2, risc is low

[openjdk]

@VladimirKempik The approval request has been created successfully.

[openjdk]

@VladimirKempik 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:

8315612: RISC-V: intrinsic for unsignedMultiplyHigh

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 1 new commit pushed to the master branch:

• 8477ff8: 8315206: RISC-V: hwprobe query is_set return wrong value

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
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.

[VladimirKempik]

tier1 is clean
/integrate

[openjdk]

Going to push as commit 9343d46.
Since your change was applied there has been 1 commit pushed to the master branch:

• 8477ff8: 8315206: RISC-V: hwprobe query is_set return wrong value

Your commit was automatically rebased without conflicts.

[openjdk]

@VladimirKempik Pushed as commit 9343d46.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.