8341893: AArch64: Micro-optimize compressed ptr decoding

[dchuyko]

This is a small clean backport to fix compressed ptr decoding inefficiency.

Testing: tier 1,2 on linux-aarch64.

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Progress

• JDK-8341893 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8341893: AArch64: Micro-optimize compressed ptr decoding (Enhancement - P4 - Rejected)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/1551/head:pull/1551
$ git checkout pull/1551

Update a local copy of the PR:
$ git checkout pull/1551
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/1551/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1551

View PR using the GUI difftool:
$ git pr show -t 1551

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/1551.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back dchuyko! 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 change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[openjdk]

⚠️ @dchuyko 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 (221cb3de)

[dchuyko]

/approval request The change is tiny, and 21u backport is clean. The operation is small but frequent, so it's good to generate smaller/faster code by the aarch64 macro assembler.

Testing: tier 1,2,3 on linux-aarch64.

[openjdk]

@dchuyko
8341893: The approval request has been created successfully.

[bridgekeeper]

@dchuyko This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply add a new comment to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[bridgekeeper]

@dchuyko This pull request has been inactive for more than 8 weeks and will now be automatically closed. If you would like to continue working on this pull request in the future, feel free to reopen it! This can be done using the /open pull request command.