RFR: 8352607: RISC-V: use cmove in min/max when Zicond is supported

[Robbin Ehn]

On Mon, 24 Mar 2025 09:27:45 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> For performance consideration please check existing `CMoveI`, which calls `enc_cmove` which calls `cmov_xx`. So if `CMoveI` brings benefit when `UseZicond == true` over `UseZicond != true`, this refactoring should also works expected, as they use the same code.
>> 
>> As for the question, whether a hardware will support `zicond` but not `zbb`, I have no answer.
>> 
>> But, anyway in fact you can just consider this as a code cleanup, in this sense seems it should be good?
>
>> better to have seperate match rules.
> 
> We could also do the similar thing to `CMoveX`, for this part I can do it in a separate PR together if this one is accecpted.

Yes, good point, I think we need to update the cost for some others as well.
We can do that separately.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24153#discussion_r2009799536