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

Tue Dec 16 18:29:41 UTC 2025

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.

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Commit messages:
 - JDK-8373682

Changes: https://git.openjdk.org/jdk/pull/28852/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28852&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373682
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28852.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28852/head:pull/28852

PR: https://git.openjdk.org/jdk/pull/28852