[riscv-port] Integrated: 8278994: riscv: RVC support

[Xiaolin Zheng]

On Mon, 20 Dec 2021 08:10:10 GMT, Xiaolin Zheng <xlinzheng at openjdk.org> wrote:

> Hi team,
> 
> This patch includes the basic definition of the RVC instruction set and some cleanups. Tested a simple `test/hotspot/jtreg/compiler/` folder on qemu.
> 
> Using `<JAVA_HOME>/bin/java -XX:+UnlockExperimentalVMOptions -XX:+UseRVC -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -XX:PrintAssemblyOptions=no-aliases,numeric -XX:+PrintStubCode -XX:-TieredCompilation` could show RVC instructions.
> 
> Thanks,
> Xiaolin

This pull request has now been integrated.

Changeset: fe82bcc1
Author:    Xiaolin Zheng <xlinzheng at openjdk.org>
Committer: Yadong Wang <yadongwang at openjdk.org>
URL:       https://git.openjdk.java.net/riscv-port/commit/fe82bcc14bbe64d4fc568aa29f01d5f100d8a84d
Stats:     1226 lines in 11 files changed: 1144 ins; 10 del; 72 mod

8278994: riscv: RVC support

Co-authored-by: Wei Kuai <kuaiwei.kw at alibaba-inc.com>
Reviewed-by: fyang, yadongwang

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PR: https://git.openjdk.java.net/riscv-port/pull/34