RFR: 8320997: RISC-V: C2 ReverseV

[Hamlin Li]

Hi,

Can you help to review this patch to implement ReverseV?

Thanks!

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/24096/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24096&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320997
  Stats: 30 lines in 2 files changed: 29 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24096.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24096/head:pull/24096

PR: https://git.openjdk.org/jdk/pull/24096