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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.