RFR: 8318220: RISC-V: C2 ReverseI [v2]

[Hamlin Li]

> Hi,
> Can you help to review this patch to add ReverseI and ReverseIL intrinsic on riscv?
> 
> Thanks!

Hamlin Li has updated the pull request incrementally with two additional commits since the last revision:

 - refine tests
 - use srai instead of srli

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/23963/files
  - new: https://git.openjdk.org/jdk/pull/23963/files/9bce9054..9b6aa066

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23963&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23963&range=00-01

  Stats: 49 lines in 3 files changed: 35 ins; 1 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/23963.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23963/head:pull/23963

PR: https://git.openjdk.org/jdk/pull/23963