[jdk21u-dev] RFR: 8345146: [PPC64] Make intrinsic conversions between bit representations of half precision values and floats

Fri Dec 27 18:39:49 UTC 2024

Almost clean backport of [JDK-8345146](https://bugs.openjdk.org/browse/JDK-8345146). Two hunks had to be integrated manually due to unrelated differences in the context. The test updates had to be integrated manually because the RISCV part is not backported.

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Commit messages:
 - Backport b42d79eb6a6d497dc63718c2854609bebca4498c

Changes: https://git.openjdk.org/jdk21u-dev/pull/1295/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1295&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345146
  Stats: 181 lines in 14 files changed: 178 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1295.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1295/head:pull/1295

PR: https://git.openjdk.org/jdk21u-dev/pull/1295