RFR: 8324124: RISC-V: implement _vectorizedMismatch intrinsic [v6]

[Yuri Gaevsky]

> Hello All,
> 
> Please review these changes to enable the __vectorizedMismatch_ intrinsic on RISC-V platform with RVV instructions supported.
> 
> Thank you,
> -Yuri Gaevsky
> 
> **Correctness checks:**
>   hotspot/jtreg/compiler/{intrinsic/c1/c2}/ under QEMU-8.1 with RVV v1.0.0 and -XX:TieredStopAtLevel=1/2/3/4.

Yuri Gaevsky has updated the pull request incrementally with one additional commit since the last revision:

  removed unneeded check for zero length; changed lmul from m8 to m2.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17750/files
  - new: https://git.openjdk.org/jdk/pull/17750/files/63410201..671546a0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17750&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17750&range=04-05

  Stats: 6 lines in 1 file changed: 0 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/17750.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17750/head:pull/17750

PR: https://git.openjdk.org/jdk/pull/17750