This project has been put on pause (perhaps indefinitely) and restarted as imp.
reg-set defines a simple register-based ISA and provides a reference
interpreter. reg-set is intended to be used for education and so makes many
trade-offs thusly. It is a work in progress.
Instructions can be composed into user-defined procedures. Labels can be injected between statements and used as targets for a goto instruction. This pair of features allows for both functional and imperative styles of programming.
_X where X matches [a-zA-Z]+ is an instruction or procedure.
#X where X matches [0-9]+ is a positive decimal integer literal.
@X where X matches [0-9]+ is a general-purpose register.
$X where X matches [0-9]+ is a special-purpose register used for parameter passing.
reg-set source code is structured as many procedure definitions, one of which
must be called 'main'. The 'main' procedure is used as the entry point for
program execution.