RFR: 8348868: AArch64: Add backend support for SelectFromTwoVector [v4]

[Bhavana Kilambi]

On Wed, 25 Jun 2025 09:49:34 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> src/hotspot/cpu/aarch64/aarch64_vector.ad line 255:
>> 
>>> 253:       // the default VectorRearrange + VectorBlend is generated as the performance of the default
>>> 254:       // implementation was slightly better/similar than the implementaion for SelectFromTwoVector.
>>> 255:       // As the SVE2 "tbl" instruction in unpredicated and partial operations cannot be generated
>> 
>> `in` -> `is`
>
> "as" -> "because".
> Consider the difference between "as I was walking home, the Perseid meteor shower produced a spectacular display" and "because I was walking home, the Perseid meteor shower produced a spectacular display".

Got it. thanks!

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PR Review Comment: https://git.openjdk.org/jdk/pull/23570#discussion_r2166334091