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Go is a programming language designed for simplicity, reliability, and efficiency.

• Go Homepage

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RISC-V support has been mainlined with Go 1.14.

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OpenJDK

GDB is the GNU Project debugger.

OpenJDK is an open-source implementation of the Java Platform (Java SE).

• OpenJDK Homepage

• OpenJDK github repository

• GDB Homepage
• Source Release Page

RISC-V

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• Andrew Burgess (Embecosm)
• Palmer Dabbelt (Google)

Releases

GDB major releases are approximately annually. There are typically one or two minor releases each year. This is the typical schedule:

• major release branch/pre-release approximately 1 month before release
• first minor release ("re-spin") approximately 3 months after major release

At the time of writing the most recent release was 10.1, released on 2020-10-24. Dates for branching (and hence release) of GDB 11 have yet to be announced.

RISC-V status

Debugging works on top of PTRACE syscalls. HW-Breakpoint or HW-Watchpoint support is missing.

Glibc

Glibc is the GNU C library.

• Glibc Homepage
• Source Release Page

RISC-V maintainers

• Palmer Dabbelt (Google)
• Andrew Waterman (SiFive)
• DJ Delorie (Red Hat)
• Darius Rad(Bluespec)

Releases

Rule of thumb: Glibc releases twice per year (February and August).

Previous releases:

• glibc 2.32 (2020-08-05)
• glibc 2.33 (2021-02-01)
• glibc 2.34 (2021-08-01)

RISC-V status

RV32 and RV64 are supported. Still, there is optimization and completeness potential.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

• LLVM Homepage
• Source Release Page

RISC-V maintainer

• Alex Bradbury (lowRISC)

LLVM RISC-V meetings

• Schedule: biweekly, Thursday 8 am (PST), since Sept 2019
• Organized by Alex Bradbury (lowRISC) and Ana Pazos (Qualcomm)
• Public announcement: https://lists.llvm.org/pipermail/llvm-dev/2021-February/148345.html

Releases

• LLVM 12 schedule
  • LLVM 12.0.0 RC1 (branching) (2021-01-26)
  • LLVM 12.0.0 RC2 (2021-02-23)
  • LLVM 12.0.0 final (2021-03-02)

The upstream release page can be found here.

RISC-V status

RV32G and RV64G are mostly implemented. However, there is still some optimization potential.

Newlib

Newlib is a C standard library implementation intended for use on embedded systems.

• Newlib Homepage
• Source Release Page

RISC-V maintainer

• Kito Cheng (SiFive)

Releases

Rule of thumb: Newlib releases once per year.

Last releases:

• Newlib 3.3.0 (2020-01-22)
• Newlib 4.0.0 (2020-11-17)
• Newlib 4.1.0 (2020-12-18)

RISC-V status

status

Two independent teams started working on the OpenJDK port.

The BishengJDK team is lead by Yadong Wang. They have published the first HotSpot JIT port for RV64G.

The PLCT team is lead by Ningning Shi.

Both teams are collaborating and working on a common RISC-V port.

The status of OpenJDK/HotSport RV64G JIT porting could be found here. They are very optimistic to reach their 100x speed-up goal.

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PHP

PHP is a programming language targeting web development.

• PHP homepage

RISC-V status

The PHP interpreter works on RISC-V. However, certain features, such as the PCRE JIT, are not ported yet and there are no RISC-V specific optimizations in the codebase at the moment. Thus optimal performance cannot be achieved right now.

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Rust

Rust is a programming language designed for performance, reliability and productivity. It relies on LLVM for generating code.

• Rust Homepage

• Rust Book

RISC-V status

Rust has tier 2 support for RISC-V RV64 (riscv64gc-unknown-linux-gnu) since 1.42.0 (2020-03-12). RV32 is supported, but currenlty does not have a complete standard library.

• https://doc.rust-lang.org/nightly/rustc/platform-support.html

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Rust Embedded

Rust Embedded is a project for enabling the Rust Programming Language on "Bare Metal" embedded systems.

• Rust Embedded Working Group

• Embedded Rust Book

RISC-V status

Since Embedded Rust does not require Rust’s standard library (no_std), more RISC-V platforms are available than for a full Rust runtime.

The following platforms are supported:

• Bare RISC-V RV32

  • RV32I

  • RV32IMAC

  • RV32IMC

• Bare RISC-V RV64

  • RV64IMAFDC

  • RV64IMAC

There is also a quickstart guide to build Rust applications for HiFive1 boards:

• https://github.com/riscv-rust/riscv-rust-quickstart

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V8

V8 is a JavaScript and WebAssembly engine with a strong focus on performance.

V8 is used a JavaScript runtime for other runtimes/projects, such as

• Google Chrome Browser

• Chromium Browser

• Node.js

RISC-V status

PLCT is working on the RISC-V port. The team is lead by Peng Wu. She and her team have managed to get their RV64GCV port mainline in February 2021. The project’s 2021 roadmap can be found hereRV32 and RV64 are supported. Still, there is optimization and completeness potential.