RFR: 8357695: RISC-V: Move vector intrinsic condition checks into match_rule_supported_vector [v4]

[Fei Yang]

On Tue, 27 May 2025 07:06:45 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

>> Hi all,
>> Please take a look and review this PR, thanks!
>> 
>> Currently, the match_rule_supported function in riscv.ad contains checks for vector-related intrinsics (e.g., FmaVF, FmaVD, RoundVF, RoundVD). These checks can be centralized into the match_rule_supported_vector function in the riscv_v.ad file, ensuring consistent handling in their appropriate context.
>> 
>> ### Testing
>> * [x]  Linux riscv64 server release build on SG2042
>
> Dingli Zhang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix typo

Thanks for the update. Latest version looks fine.
I built fastdebug build and performed `jdk_vector`, `compiler/vectorization` and `compiler/vectorapi` tests using qemu-system (with rvv vlen=256). Result looks good.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25438#pullrequestreview-2873267658