8321008: RISC-V: C2 MulAddVS2VI

[Hamlin-Li]

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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Progress

• [ ] Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue

Issues

• JDK-8321008: RISC-V: C2 MulAddVS2VI (Sub-task - P4)
• JDK-8320986: RISC-V: C2 MulAddS2I (Sub-task - P4)

Reviewing

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