RFR: 8315716: RISC-V: implement ChaCha20 intrinsic

[Hamlin Li]

On Mon, 25 Sep 2023 13:04:59 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> src/hotspot/cpu/riscv/vm_version_riscv.cpp line 191:
>> 
>>> 189:   if (UseRVV && FLAG_IS_DEFAULT(UseChaCha20Intrinsics)) {
>>> 190:     FLAG_SET_DEFAULT(UseChaCha20Intrinsics, true);
>>> 191:   }
>> 
>> Just below this we may set RVV to false.
>> I would put this just above "#ifdef COMPILER2" or so.
>
> 👍 https://github.com/openjdk/jdk/pull/15899/files#diff-7b173d6e5834de13749c8333192fef5a874628a67b90a5d8d06235d507542ac4R255 seems like the ideal place.

Thanks Robbin, Fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15899#discussion_r1335921835