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This directory contains several Brainfuck interpreters in various states of
sophistication, from the simplest approach to an optimizing JIT compiler:
* `bf.c` is the stupidest one and the oldest by far
* `bf-faster-loops.c` precomputes loop jumps
* `bf-optimizing.c` improves on that by changing `[-]+` loops into assignments
* `bf-jit.c` adds JIT compilation for Intel x86-64
* `bf-jit-opt.c` tries a bit harder to avoid looping on the current value
* `bf-jit-unsafe.c` abolishes all boundary checks when moving across the tape
* `bf-jit-unsafe-opt.c` makes use of immediate offsets to modify values
I recommend using a tool such as _meld_ to view the differences.
Just run `make` in this directory to have them all built, and append
`CPPFLAGS=-DDEBUG` to get dumps of the IR for the more sophisticated JITs.
The interpreters take the program on standard input and read characters
directly from the terminal device, so to run a simple `cat`-like program,
you can do:
$ echo ',[.,]' | ./bf
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