RFR: 8361836: RISC-V: Relax min vector length to 32-bit for short vectors [v2]

[Dingli Zhang]

On Tue, 15 Jul 2025 03:16:17 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Thanks for the review!
>> I think assert or guarantee are unnecessary for types not explicitly covered, as their behavior is safely constrained by general rules and global constraints (e.g., limit the min vector size to 8-byte and minimum size of 2).
>
> I think it's more clear to make this a switch-case listing the other cases as the default like the aarch64 counterpart.

Fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26239#discussion_r2206229388