[jdk17u-dev] RFR: 8302907: [PPC64] Use more constexpr in class Register

[Martin Doerr]

On Mon, 13 May 2024 10:46:42 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> Clean backport of [JDK-8302907](https://bugs.openjdk.org/browse/JDK-8302907).

GHA failure is unrelated. This PR only touches one PPC64 file.

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/2461#issuecomment-2108696046