RFR: 8321001: RISC-V: C2 SignumVF [v2]

[Hamlin Li]

> Hi,
> Can you review the patch to add intrinisc SignumVF/SignumVD on riscv?
> Thanks
> 
> ## Test
> test/hotspot/jtreg/compiler/intrinsics/
> test/hotspot/jtreg/compiler/vectorapi/
> and tests found via:
> grep -nr test/hotspot/jtreg/ -we Math.signum
> and test found via:
> grep -nr test/jdk/ -we Math.signum

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

  add v0 to effect

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16925/files
  - new: https://git.openjdk.org/jdk/pull/16925/files/3276c71e..4b89ab0f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16925&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16925&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16925.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16925/head:pull/16925

PR: https://git.openjdk.org/jdk/pull/16925