RFR: 8321010: RISC-V: C2 RoundVF [v2]

[Hamlin Li]

> Hi,
> Can you have a review on this patch to add RoundVF/RoundDF intrinsics?
> Thanks!
> 
> ## Tests
> 
> test/hotspot/jtreg/compiler/vectorization/TestRoundVectRiscv64.java test/hotspot/jtreg/compiler/c2/cr6340864/TestFloatVect.java test/hotspot/jtreg/compiler/c2/cr6340864/TestDoubleVect.java test/hotspot/jtreg/compiler/floatingpoint/TestRound.java
> 
> test/jdk/java/lang/Math/RoundTests.java

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

  fix space

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17745/files
  - new: https://git.openjdk.org/jdk/pull/17745/files/c7c87bf5..1695aeb4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17745&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17745&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/17745.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17745/head:pull/17745

PR: https://git.openjdk.org/jdk/pull/17745