RFR: 8369456: [TESTBUG] Fix the test failure of TestSelectFromTwoVectorOp.java on sve2 platforms [v2]

[Emanuel Peter]

On Tue, 4 Nov 2025 05:50:27 GMT, erifan <duke at openjdk.org> wrote:

>> Yes, we currently do not have any >128 bits SVE2 machines. According to  https://github.com/openjdk/jdk/blob/4f9f086847f531ab1791727d74955cfd8ec56811/src/hotspot/cpu/aarch64/aarch64_vector.ad#L273 these cases are currently unsupported. This is why the test failed.
>
> I added a rule for cases where the `MaxVectorSize` > `16/32/64`, so that these cases will also be tested once they are supported.
> @eme64  Would you mind take another look, thanks!

@erifan That looks like a good set of updates to me :)

General question: can `sve2` not use the vectors from `neon` or `sve`, which do support those vector sizes? But that would be a separate issue anyway, we are for now just trying to fix up the test.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27723#discussion_r2488941517