ClacJIT

A Just-In-Time compiler and interpreter for Clac. Written in Rust.

Introduction

clacjit is a Just-In-Time compiler and interpreter for clac language.

clac is a command line, stack-based calculator with postfix notation.

clacjit generally follows the same clac specification used in CMU 15-122. However:

• Some clac programs will trigger error in 122-clac but not in clacjit.

• In jit mode, only stack underflow is checked. You will get segfault, fpe, etc. Technically, you can also access arbitrary address.

• jit only supports x64 devices.

Usage

• Build: cargo b -r

• Run without jit: clacjit <file1> <file2> <...>

• Run with jit: clacjit --jit <file1> <file2> <...>

Examples

Run my MNIST implementation in clac:

• With JIT: cargo r ./clac/mnist.clac ./clac/mnist-main.clac --jit

  Takes: 53.2 ms ± 5.9 ms

• Without JIT: cargo r ./clac/mnist.clac ./clac/mnist-main.clac

  Takes: 142.4 ms ± 14.0 ms

As a comparison, clac-ref takes 36.871 s.