RFR: 8316592: RISC-V: implement poly1305 intrinsic [v9]

[Andrew Haley]

On Thu, 9 Nov 2023 11:15:12 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> ArsenyBochkarev has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Rename poly1305-specific functions
>>  - Add final conditional reduce
>
> src/hotspot/cpu/riscv/stubGenerator_riscv.cpp line 4528:
> 
>> 4526:     Label DONE, LOOP;
>> 4527: 
>> 4528:     __ mv(t1, checked_cast<u1>(BLOCK_LENGTH));
> 
> Is it necessary for riscv to have a `checked_cast<u1>` for the immediates?

It's not strictly necessary to assert anything. It is good practice.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16417#discussion_r1389215778