RFR: 8373682: Test compiler/loopopts/superword/TestReinterpretAndCast.java fails on x86_64 with AVX but without f16c

[Emanuel Peter]

On Wed, 17 Dec 2025 08:53:24 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> The IR rules of the test failed because we expected that `VectorCastF2HF` and `VectorCastHF2F` are available on `AVX`, but actually we need `f16c`. On Sandy Bridge we have `AVX` but not `f16c`, so the IR rules fail on those machines.
>> 
>> Solution: require `f16c` feature.
>
> Looks good, thanks!

@chhagedorn @vnkozlov @jsikstro Thanks for the reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/28852#issuecomment-3668689014