RFR: 8352423: RISC-V: simplify DivI/L ModI/L [v2]

[Hamlin Li]

> Hi,
> Can you help to review this patch?
> 
> Currently, implementation of DivI/L and ModI/L are overcomplicated, could and should be simplified.
> And, also enable some DivI/L and ModI/L related tests.
> 
> Thanks!

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

  copyright

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24119/files
  - new: https://git.openjdk.org/jdk/pull/24119/files/85b880be..64d1ad47

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24119&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24119&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24119.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24119/head:pull/24119

PR: https://git.openjdk.org/jdk/pull/24119