[jdk17u-dev] RFR: 8276799: Implementation of JEP 422: Linux/RISC-V Port [v4]

[Fei Yang]

> The RISC-V port was originally developed at Huawei Technologies, then integrated into OpenJDK 19.
> 
> The 17u version of the port has continued to be maintained in the openjdk/riscv-port-jdk17u repo later
> and has been tested for several months. There are few changes to shared HotSpot code (mostly the main
> one is C1 conditional move/branch support for RISC-V). As required by 17u maintainer, changes to shared
> code has been kept to a minimum. Only enabling shared changes are incorporated and these changes are
> properly guarded with macro RISCV. So this 17u port should not breaking existing code and, although it is
> a large patch, finally integrating it into 17u upstream should be low risk.
> 
> Testing on linux-riscv64 platform:
> - [x] Bootcycle (release & fastdebug build)
> - [x] Tier1-4 tests (release build)
> - [x] Benchmark workloads (Dacapo, SPECJbb2015, SPECJVM2008, Renaissance. release build)

Fei Yang has updated the pull request incrementally with one additional commit since the last revision:

  8285630: Fix a configure error in RISC-V cross build

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1427/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1427/files/97492d63..756c8396

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1427&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1427&range=02-03

  Stats: 9 lines in 1 file changed: 7 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1427.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1427/head:pull/1427

PR: https://git.openjdk.org/jdk17u-dev/pull/1427