PPC64 implementation with many optimizations disabled by default. Many tests are already passing. We may be able to fix some more this week, but we can work on the remaining ones after the Valhalla integration into mainline.
This PR only touches PPC64 files. No risk for other platforms. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8386638: [lworld] Port JEP 401 to PPC64 Changes: https://git.openjdk.org/valhalla/pull/2549/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2549&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8386638 Stats: 1511 lines in 24 files changed: 1224 ins; 126 del; 161 mod Patch: https://git.openjdk.org/valhalla/pull/2549.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2549/head:pull/2549 PR: https://git.openjdk.org/valhalla/pull/2549
