RFR: 8314124: RISC-V: implement Base64 intrinsic - decoding [v5]

[Hamlin Li]

On Tue, 27 Aug 2024 04:25:33 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   refine
>
> src/hotspot/cpu/riscv/stubGenerator_riscv.cpp line 5478:
> 
>> 5476:     // vector version
>> 5477:     if (UseRVV) {
>> 5478:       __ bnez(isMIME, ScalarLoop);
> 
> BTW: I think this branch on `isMIME` also deserves a code comment about why it's needed.

also added.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20026#discussion_r1732308448