Creole is a bytecode designed for simple implementations.

## Bytecode Format

Each creole line consists of pseudo-UTF-8 characters. The first byte
is an unsigned number between 0 and 127 (the high bit is clear). Each
suceeding pseudo-UTF-8 character is encoded as follows:

* `110xxxxx 10xxxxxx`
* `1110xxxx 10xxxxxx 10xxxxxx`
* `11110xxx 10xxxxxx 10xxxxxx 10xxxxxx`
* `111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx`
* `1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx	10xxxxxx`
* `11111110 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx`

The first four bytes determine the type:

* `0`: Value is a register.
* `1`: Value is immediate.

All other values are reserved. Overlong values are allowed, and for some
argument values they are necessary. All lines are terminated by a byte
of all zeros.