RFR: 8352248: Check if CMoveX is supported [v2]

[Hamlin Li]

On Fri, 21 Mar 2025 11:17:35 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   minor
>
> Marked as reviewed by luhenry (Committer).

Thank you @luhenry @robehn !

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PR Comment: https://git.openjdk.org/jdk/pull/24095#issuecomment-2743184022