RFR: 8357551: RISC-V: support CMoveF/D vectorization [v3]

[Hamlin Li]

On Mon, 17 Nov 2025 07:27:30 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Make sense. I filed https://bugs.openjdk.org/browse/JDK-8371920 to track the task, will do it later after this pr.
>
> I would suggest that you already make the move from `@requires` to IR rule level restrictions. But we can look at adding `x64` and `aarch64` in the separate RFE.

Merge of scalar and vector tests is done.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/28309#discussion_r2534089875