https://github.com/mohanson/rv64

RISC-V RV64IMAFDC(RV64GC) Emulator
https://github.com/mohanson/rv64

emulator golang riscv

Last synced: 3 months ago
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RISC-V RV64IMAFDC(RV64GC) Emulator

• Host: GitHub
• URL: https://github.com/mohanson/rv64
• Owner: mohanson
• Created: 2020-02-16T06:34:17.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2023-05-07T00:19:39.000Z (almost 2 years ago)
• Last Synced: 2024-06-20T12:49:06.231Z (8 months ago)
• Topics: emulator, golang, riscv
• Language: Go
• Homepage:
• Size: 60.5 KB
• Stars: 12
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# RISC-V RV64IMAFDC Emulator

An outstanding RISC-V RV64IMAFDC(RV64GC) simulator.

# Install riscv-gnu-toolchain

First of all, riscv gnu toolchain must be installed. Source repo is at [https://github.com/riscv/riscv-gnu-toolchain](https://github.com/riscv/riscv-gnu-toolchain), complete the build with the following commands:

```sh

$ apt install autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev

```

```sh

$ git clone --recursive https://github.com/riscv/riscv-gnu-toolchain

$ cd riscv-gnu-toolchain

$ git submodule update --init --recursive

$ ./configure --prefix=/opt/riscv --with-arch=rv64gc

$ make

```

# Install rv64

```sh

$ git clone https://github.com/mohanson/rv64

$ cd rv64

$ go run cmd/make/main.go

```

The binary file `rv64` will be located at the `./bin` directory. Could test it with the following command:

```sh

$ export RISCV=/opt/riscv

$ ./bin/make test

[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64ua-u-amoadd_d

[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64ua-u-amoadd_w

# Many lines ...

[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64um-u-remuw

[ok] $ ./bin/rv64 /tmp/riscv-tests/isa/rv64um-u-remw

```

# Lick it

Let's compile a simple C file, which implements the fibonacci function.

```c

int fib(int n) {

    if (n <= 1) {

        return n;

    }

    return fib(n - 1) + fib(n - 2);

}

int main() {

    return fib(10);

}

```

```sh

$ /opt/riscv/bin/riscv64-unknown-elf-gcc -o /tmp/fib ./res/program/fib.c

$ ./bin/rv64 -- /tmp/fib

$ echo $?

# 55

```

# Licence

WTFPL.