RFR: 8365732: RISC-V: implement AES CTR intrinsics [v26]

[Anjian Wen]

On Wed, 19 Nov 2025 09:50:05 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> key length could be only {11, 13, 15} * 4 = {44, 52, 60}，I notice that x86 and aarch64 use directly 52，I think add some more comment will be enough？
>
> Can you add some comments in other existing code with magic 52 if they mean the same thing? Thanks!

sure，I have already added comments to the identical parts.

>> it's a return value saved to x10, it seems necessary according to aarch64 and x86, aarch64 used r0 to save it and x86 used rax
>
> There is a `mv` before exit of `generate_counterMode_AESCrypt`, is this one still necessary?

Yes, about the `mv` before `generate_counterMode_AESCrypt`, it is for a different branch when input_len is zero at the first time. For the purpose to avoid additional jump, each code exit from `counterMode_AESCrypt`  is a Independent exit, so I think we need to keep this `mv` here.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/25281#discussion_r2544162600
PR Review Comment: https://git.openjdk.org/jdk/pull/25281#discussion_r2544163484