RFR: 8316592: RISC-V: implement poly1305 intrinsic [v7]

[Hamlin Li]

On Wed, 8 Nov 2023 19:06:00 GMT, ArsenyBochkarev <duke at openjdk.org> wrote:

>> Oh, I see it now. Good catch, thanks! Let's do one final conditional reduce then.
>
> Done.

Thanks for updating.
Looks safer, but I'm not sure if it's too conservative or not safe enough.
Can we wait for a while to see how others think about it or what new discoveries have we made about ourselves?

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PR Review Comment: https://git.openjdk.org/jdk/pull/16417#discussion_r1387731385