CFV: New Project: RISC-V Port

[Mario Torre]

Vote: yes

Cheers,
Mario

—
Mario Torre
Java Champion and OpenJDK contributor

PGP Key: 0BAB254E
Fingerprint: AB1C 7C6F 7181 895F E581 93A9 C6B8 A242 0BAB 254E

Twitter: @neugens
Web: https://www.mario-torre.eu/
Music: https://mario-torre.bandcamp.com/

> On Saturday, Oct 16, 2021 at 23:53, Langer Christoph <christoph.langer at sap.com (mailto:christoph.langer at sap.com)> wrote:
> Vote:yes
>
> /Christoph
>
> > -----Original Message-----
> > From: announce <announce-retn at openjdk.java.net> On Behalf Of Yangfei
> > (Felix)
> > Sent: Montag, 11. Oktober 2021 04:40
> > To: announce at openjdk.java.net
> > Subject: CFV: New Project: RISC-V Port
> >
> > I hereby propose the creation of the "RISC-V Port" Project with Fei Yang
> > as the Lead and Porters Group as the sponsoring group [1].
> >
> > The goal of the project will be to provide a full featured port of OpenJDK
> > on the RISC-V platform. The current project would only target Linux. RISC-V
> > ISA is actually a family of related ISAs of which there are currently four
> > base ISAs [2]. Those base ISAs can be combined with a set of standard
> > extensions. RV64G and RV32G are defined as general-purpose ISAs. This
> > port
> > will support RV64GV , i.e., RV64G ISA plus the "V" standard extension for
> > vector operations [3]. And the implementation will be fully compatible with
> > RISC-V ISA specifications. This port may support other ISA variants like
> > RV32G depending on community interest.
> >
> > We (Huawei Technologies) already have a complete (i.e. template
> > interpreter,
> > C1 and C2 JIT) RISC-V port. This work is based on reasonably recent snapshot
> > of JDK mainline and resides in the riscv-port-branch of jdk-sandbox:
> >
> > https://github.com/openjdk/jdk-sandbox/tree/riscv-port-branch
> >
> > We've passed JTReg tests on QEMU and HiFive Unleashed board. So it
> > should be
> > good enough to run most Java programs. The VectorAPI and ForeignAPI
> > features
> > are not supported for now. Support for vector operations is experimental,
> > we
> > need to do more testing for this part. We've provided full build instructions
> > [4], but we'll help you if you get stuck. Aleksey Shipilev is building
> > riscv-port-branch nightlies here [5]. We want people to try it out.
> >
> > We intend to continuously rebase the source code to the latest JDK mainline,
> > and
> > then, after a round of in-project reviews, suggest it for integration into JDK
> > mainline. If this project is approved, I believe we still have time to submit
> > the integration JEP targeting JDK 18. We would welcome your advice and
> > guidance about this.
> >
> > We will consider 17u and 11u backports, after JDK mainline integration is
> > done.
> > This, of course, depends on whether the 17u and 11u maintainers would
> > approve
> > such backport.
> >
> > Fei Yang has been working on OpenJDK for aarch64 port project since year
> > 2015
> > and is an OpenJDK committer [6]. He is currently a major developer for
> > OpenJDK
> > RISC-V port and has reviewed most of the code changes internally.
> > Previously,
> > he is also a GCC committer [7] and has contributed various performance and
> > bugfixes since year 2013.
> >
> > The proposed initial set of reviewers are:
> >
> > Fei Yang
> > Aleksey Shipilev
> > Edward Nevill
> >
> > Votes are due by 9:00 UTC on Monday 25, October 2021
> >
> > Only current OpenJDK Members [8] are eligible to vote on this
> > motion. Votes must be cast in the open on the discuss list.
> > Replying to this message is sufficient if your mail program
> > honors the Reply-To header.
> >
> > For Lazy Consensus voting instructions, see [9].
> >
> > Fei Yang
> >
> > [1] https://mail.openjdk.java.net/pipermail/discuss/2021-
> > October/005964.html
> > [2] https://github.com/riscv/riscv-isa-manual
> > [3] https://github.com/riscv/riscv-v-spec/releases/download/v1.0/riscv-v-
> > spec-1.0.pdf
> > [4] http://cr.openjdk.java.net/~fyang/openjdk-riscv-port/BuildRISCVJDK.md
> > [5] https://builds.shipilev.net/openjdk-jdk-riscv
> > [6] http://openjdk.java.net/census#fyang
> > [7] https://github.com/gcc-mirror/gcc/blob/master/MAINTAINERS
> > [8] http://openjdk.java.net/census#members
> > [9] http://openjdk.java.net/projects/#new-project-vote