[riscv-port] RFR: 8276792: RISC-V Port: Initial support for RV64GV

[Aleksey Shipilev]

On Mon, 8 Nov 2021 03:15:55 GMT, Fei Yang <fyang at openjdk.org> wrote:

> This riscv64 port supports RV64GV, shorthand for RV64IMAFDV ISA extensions, and covers the templateInterpreter, C1 and C2, excluding AOT/JVMCI. All existing GCs are available on riscv64, including ZGC and ShenandoahGC.
> 
> Passed jtreg tier{1,2,3,4} and jcstress tests on HiFive Unmatched board. SPECjbb & SPECjvm benchmark tests are also carried out regularly. So it should be good enough to run most Java programs.

Honestly, you could just push it :) No need for PR for the first import.

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Marked as reviewed by shade (Reviewer).

PR: https://git.openjdk.java.net/riscv-port/pull/1