RFR: 8331577: RISC-V: C2 CountLeadingZerosV [v2]

[Hamlin Li]

> Hi,
> Can you help to review this patch adding CountLeadingZerosV and CountTrailingZerosV instrinsics?
> Thanks.

Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:

  fix masked issue

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19153/files
  - new: https://git.openjdk.org/jdk/pull/19153/files/9c38914a..1d5d17fe

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19153&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19153&range=00-01

  Stats: 8 lines in 1 file changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/19153.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19153/head:pull/19153

PR: https://git.openjdk.org/jdk/pull/19153