About

• This is probably my first attempt at doing a relatively large project from scratch. I learnt a lot along the way but I also wrote code in such a way that got things done. In other words, there is no proper software design, especially for the backend. The code may be inefficient and unreadable at times.
• I plan on redoing this project (maybe in C or Rust) but this time with proper design and good code.

Vox compiler

• This compiler is for RISC-V architecture. Dockerfile provides the environment with necessary toolchains and simulators to run programs.
• Alternatively you can install the dependencies locally -> link

Running

To run:
1- bash run <.vox file>
2- riscv64-unknown-linux-gnu-gcc -march=rv64gcv -static c_helper.c v_helper.s code.s -o main

• code.s is the assembly file generated

Issues:

• Vector operations do not work. You can only initialize and print vectors.
• Short circuting (and & or operations) doesn't work properly.

Other notes:

• There are some tests available in tests/ dir.
• Functions work (with recursion) and its tested in tests/funcs.vox

Install RISC-V locally

1. Dependencies:

sudo apt install device-tree-compiler git wget tar build-essential libglib2.0-dev libfdt-dev libpixman-1-dev zlib1g-dev ninja-build python3 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

2. Environment Variables: Add these to ~/.bashrc:

export RISCV="/opt/riscv/"
export PATH="${PATH}:${RISCV}bin/:${RISCV}riscv64-unknown-linux-gnu/bin/"

2. Spike Simulator:

git clone https://github.com/riscv-software-src/riscv-isa-sim
mkdir riscv-isa-sim/build
cd riscv-isa-sim/build
../configure --prefix=$RISCV
make
[sudo] make install

3. GNU Toolchain for riscv programs configured for linux kernels - takes a very long time!:

git clone https://github.com/riscv-collab/riscv-gnu-toolchain
mkdir riscv-gnu-toolchain/build
cd riscv-gnu-toolchain/build
../configure --prefix=$RISCV
make linux

4. Proxy Linux Kernel:

git clone https://github.com/riscv-software-src/riscv-pk
mkdir riscv-pk/build
cd riscv-pk/build
../configure --prefix=$RISCV --host=riscv64-unknown-linux-gnu
make
[sudo] make install

5. QEMU (emulator for riscv64 user-level programs for linux):

wget https://download.qemu.org/qemu-7.2.0-rc4.tar.xz
tar -xf qemu-7.2.0-rc4.tar.xz
mkdir qemu-7.2.0-rc4/build
cd mkdir qemu-7.2.0-rc4/build
../configure --target-list=riscv64-linux-user
make
[sudo] make install