8373998: RISC-V: simple optimization of ConvHF2F

[RealFYang]

Hi all,

This pull request contains a backport of commit 5eb87749 from the openjdk/jdk repository.

The commit being backported was authored by Hamlin Li on 19 Dec 2025 and was reviewed by Fei Yang and Dingli Zhang.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8373998 needs maintainer approval

Issue

• JDK-8373998: RISC-V: simple optimization of ConvHF2F (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/116/head:pull/116
$ git checkout pull/116

Update a local copy of the PR:
$ git checkout pull/116
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/116/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 116

View PR using the GUI difftool:
$ git pr show -t 116

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/116.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back fyang! 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]

@RealFYang 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:

8373998: RISC-V: simple optimization of ConvHF2F

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 16 new commits pushed to the master branch:

• d26f8e1: 8353755: Add a helper method to Util - findComponent()
• b65e0bb: 8366817: test/jdk/javax/net/ssl/TLSCommon/interop/JdkProcServer.java and JdkProcClient.java should not delete logs
• 6cc7fc7: 8367278: Test compiler/startup/StartupOutput.java timed out after completion on Windows
• ... and 13 more: https://git.openjdk.org/jdk25u-dev/compare/c3eecc0465e570dcc19aa1f5bc9ed4db8dcb4e63...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.

[openjdk]

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

[openjdk]

⚠️ @RealFYang 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.

[RealFYang]

/approval request Backport to improve C2 code generation when converting incoming short value to a FP32 value.
This is a RISC-V specific change. Performed hs:tier1-hs:tier3 tests on linux-riscv64 platform with Zfh extension.

[openjdk]

@RealFYang
8373998: The approval request has been created successfully.

[mlbridge]

Webrevs

• 00: Full (0861e0ac)

[RealFYang]

/integrate

[openjdk]

Going to push as commit bf5c6a8.
Since your change was applied there have been 17 commits pushed to the master branch:

• 1f61227: 8372857: Improve debuggability of java/rmi/server/RemoteServer/AddrInUse.java test
• d26f8e1: 8353755: Add a helper method to Util - findComponent()
• b65e0bb: 8366817: test/jdk/javax/net/ssl/TLSCommon/interop/JdkProcServer.java and JdkProcClient.java should not delete logs
• ... and 14 more: https://git.openjdk.org/jdk25u-dev/compare/c3eecc0465e570dcc19aa1f5bc9ed4db8dcb4e63...master

Your commit was automatically rebased without conflicts.

[openjdk]

@RealFYang Pushed as commit bf5c6a8.

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