[riscv-port] RFR: 8278547: riscv: Refactor moving assembler functions for vector instructions into separate file

[Fei Yang]

On Wed, 15 Dec 2021 08:59:57 GMT, Yanhong Zhu <yzhu at openjdk.org> wrote:

> RISCV have several feature extensions: RVV, RVC and RVB.
> Work in under progress to support those features in Hotspot JVM.
> For maintenance purposes, we should move assembler functions for specific feature into separate file.
> This patch refactors existing code moving assembler functions for RVV into feature-specific files.
> 
> Hotspot and jdk tier1 passed on the unmatched board. Performed full jtreg tests with qemu without new failures.

Looks good. Thanks.

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Marked as reviewed by fyang (Lead).

PR: https://git.openjdk.java.net/riscv-port/pull/32