JIT calculator challenge implemented with ejit

This is an implementation of the JIT calculator challenge using my ejit library in C. Possibly not quite what was intended with the challenge, but at least I had a nice evening.

Building

This repository uses submodules, remember to run

git submodule update --init --recursive

To build, run

make

which should produce a calc binary. You can add compilation parameters like

make RELEASE=1 LTO=1

to build an optimized binary. Remember to make clean before you specify new parameters.

ejit

ejit is a library that implements a bytecode interpreter for a language (almost) identical to the one used by the massively cool lightening JIT library. The idea is that ejit transparently lowers all bytecode instructions to the equivalent lightening instructions, which in turn are lowered to machine code when on a supported machine. For machines not (yet) supported by lightening, the bytecode interpeter means that programs written with ejit will still function correctly, just a bit slower.