RFR: 8364305: Support AVX10 saturating floating point conversion instructions [v18]

[Mohamed Issa]

On Mon, 29 Sep 2025 18:41:31 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> > Is the main issue that each AVX10 reference (e.g., C2_MacroAssembler::vector_castF2X_avx10) isn't descriptive enough about which minimum sub-version is in use at a quick glance?
> 
> Yes, the confusing part is avx10 implies AVX10.2 and not AVX10.1.
> 
> AD files also suffer from it though it's less confusing there:
> 
> ```
> instruct ..._avx10(...)
> %{
>   predicate(VM_Version::supports_avx10_2());
> ```

Ok, I created [JDK-8368977](https://bugs.openjdk.org/browse/JDK-8368977) to track the change.

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PR Comment: https://git.openjdk.org/jdk/pull/26919#issuecomment-3353842703