RFR: 8321008: RISC-V: C2 MulAddVS2VI

Tue Apr 23 15:06:36 UTC 2024

Hi,
Can you help to review the patch?

The motivation is to implement `MulAddVS2VI`.
But to enable `MulAddVS2VI`, `MulAddS2I` is prerequisite, although `MulAddS2I` does not bring extra benefit on riscv as we don't have an specific instruction of muladd on riscv.
So, this patch implement both `MulAddVS2VI` and `MulAddS2I`. 

Thanks

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/18919/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18919&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321008
  Stats: 73 lines in 4 files changed: 72 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18919.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18919/head:pull/18919

PR: https://git.openjdk.org/jdk/pull/18919