# sprit-forth

Sprit Forth is a tiny and portable subroutine-threaded Forth written in modern C++. It is inspired by [Alee Forth](https://code.bitgloo.com/bitgloo/alee-forth) and [milliForth](https://github.com/fuzzballcat/milliForth).

Subroutine-threading is an improvement over Alee Forth's tokenized threading: words are compiled as lists of function pointers such that their execution is direct and "native". By sticking to subroutines instead of directly compiling assembly instructions, Sprit Forth maintains entirely portable.

In terms of size, the `libsprit.a` library is only around 4kB on x86\_64 without optimizations, down to around 2kB with size optimizations, and *under 1kB* on a 16-bit MSP430 microcontroller.

**Sprit Forth is early in development.** The project won't be considered "stable" until at least the [core standard word-set](https://forth-standard.org/standard/core) is implemented.

## Requirements

A C++ compiler that supports the C++20 standard.

## Building

Run `make`. There are `x86` and `msp430` targets available to target those architectures.