RFR: 8352159: RISC-V: add more zfa support [v3]

[Hamlin Li]

> Hi,
> Can you help to review this patch?
> 
> Previously in https://github.com/openjdk/jdk/pull/23844, `loadConH` is implemented only with `flh`, but `fli_h` should be more efficient if Zfa is supported; min/max for HF could use fmin/maxm.h instead too.
> 
> Thanks!

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

 - fix fli_h
 - fix rFlagsReg
 - refactor min/max

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24081/files
  - new: https://git.openjdk.org/jdk/pull/24081/files/2b244afc..ec9f4725

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24081&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24081&range=01-02

  Stats: 42 lines in 2 files changed: 17 ins; 10 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/24081.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24081/head:pull/24081

PR: https://git.openjdk.org/jdk/pull/24081