RFR: 8334554: RISC-V: verify & fix perf of string comparison [v3]

[Hamlin Li]

On Wed, 3 Jul 2024 11:29:34 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   misc
>
> We should do the register-group in a follow up PR.

Thanks @luhenry @robehn @RealFYang for your reviewing.

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PR Comment: https://git.openjdk.org/jdk/pull/19825#issuecomment-2206714862