[jdk25] RFR: 8365206: RISC-V: compiler/c2/irTests/TestFloat16ScalarOperations.java is failing on riscv64

[Hamlin Li]

8365206: RISC-V: compiler/c2/irTests/TestFloat16ScalarOperations.java is failing on riscv64

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Commit messages:
 - Backport 28602f3d3ec15b5241a33a46ce43349e6300395d

Changes: https://git.openjdk.org/jdk/pull/26958/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26958&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365206
  Stats: 264 lines in 6 files changed: 237 ins; 21 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/26958.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26958/head:pull/26958

PR: https://git.openjdk.org/jdk/pull/26958