[jdk25u] Integrated: 8368732: RISC-V: Detect support for misaligned vector access via hwprobe

[Dingli Zhang]

On Tue, 30 Sep 2025 04:46:01 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi,
> Please help review this backport to jdk25u, thanks!
> 
> Backport of [JDK-8368732](https://bugs.openjdk.org/browse/JDK-8368732).
> 
> The original patch cannot be directly applied because of jdk25u do not have [JDK-8367253](https://bugs.openjdk.org/browse/JDK-8367253) or [JDK-8367103](https://bugs.openjdk.org/browse/JDK-8367103).
> 
> Manually checked the result on platforms w/wo fast misaligned vector accesses by running:
> 
> $ java -XX:+PrintFlagsFinal -version | grep AlignVector

This pull request has now been integrated.

Changeset: 66de4b41
Author:    Dingli Zhang <dzhang at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.org/jdk25u/commit/66de4b41b9eb19e5ba3a3b7ae04bc0932419cbed
Stats:     61 lines in 4 files changed: 47 ins; 1 del; 13 mod

8368732: RISC-V: Detect support for misaligned vector access via hwprobe

Reviewed-by: fyang
Backport-of: 538a722c2e9123cc575355879ff230444cf2dadc

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PR: https://git.openjdk.org/jdk25u/pull/252