[jdk17u-dev] RFR: 8321025: Enable Neoverse N1 optimizations for Neoverse V2
Xiaolong Peng
xpeng at openjdk.org
Mon Jun 17 14:40:40 UTC 2024
### Notes
Backport 8321025: Enable Neoverse N1 optimizations for Neoverse V2 to jdk17, it is not a clean backport, the method ```model_is(0xd40) ``` is in jdk17, equivalent code in jdk17 is like ```(_model == 0xd40 || _model2 == 0xd40)```.
### Verification
Not able to test it on CPU with Neoverse V2, I don't have server supports Neoverse V2 yet, but the code has been backported to [Amazon Corretto 17](https://github.com/corretto/corretto-17/blob/release-17.0.11.9.1/CHANGELOG.md) since January 16, 2024, overall it should be a low risk.
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Commit messages:
- Backport c9d15f7d5ee616bf48d85647ee504714ac5fafc2
Changes: https://git.openjdk.org/jdk17u-dev/pull/2579/files
Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2579&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8321025
Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
Patch: https://git.openjdk.org/jdk17u-dev/pull/2579.diff
Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2579/head:pull/2579
PR: https://git.openjdk.org/jdk17u-dev/pull/2579
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