RFR: 8320999: RISC-V: C2 RotateLeftV [v2]

[Hamlin Li]

> Hi,
> Can you help to review this patch?
> More detailed description is inline in the code.
> Thanks

Hamlin Li has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 12 commits:

 - merge
 - Fix imm6 in vror.vi; misc
 - Merge branch 'master' into rotate-left-right-v
 - add comments
 - fix mask
 - fix imm & long
 - fixes
 - Merge branch 'master' into rotate-left-right-v
 - fixes
 - remove redundant code: UseZvbb
 - ... and 2 more: https://git.openjdk.org/jdk/compare/a0c5714d...edd0201d

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Changes: https://git.openjdk.org/jdk/pull/19325/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19325&range=01
  Stats: 218 lines in 4 files changed: 210 ins; 3 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/19325.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19325/head:pull/19325

PR: https://git.openjdk.org/jdk/pull/19325