ArtSembly

Arturo VM Bytecode assembler for Arturo

What does this package do?

This package features a bytecode "assembler" for the Arturo programming language. In a few words, it allows to write bytecode for the Arturo VM directly, only in a friendly, Assembly-style fashion.

Warning

This package is to be considered mostly an - adventurous - experiment, highlighting what is possible and is not meant to be neither a replacement of Arturo nor a 100% functional bytecode assembler that aims to cover everything!

How do I use it?

All you have to do is import it and then pass a block (or text) of valid ArtSembly code. The returned value is always a Bytecode object, which means that you can either run it directly (via do) or manipulate it further, if you wish.

Example

import "artsembly"!

do assemble {
    push 0                 ; x: 0
    store 'x

    theLoop:
        load 'x            ; print x
        call 'print

        load 'x
        push 1
        call 'add
        store 'x           ; x: 1 + x

        load 'x
        push 5
        call 'equal?       ; x = 5

        jmpIf 'finished    ; if x = 5 -> go to finished

        goto 'theLoop      ; else -> go back up

    finished:
        push "finished!"
        call 'print        ; print "finished!"
}

Output:

0
1
2
3
4
finished!

Available commands

Name	Arguments	Description
`push`	:any	push a value onto the stack
`store`	:literal, :string	store topmost stack item to given symbol
`load`	:literal, :string	push given symbol value to stack
`call`	:literal, :string	call given function by name
`goto`	:literal, :string	go to given label
`jmpIf`	:literal, :string	jump forward to given label if topmost stack value is true
`jmpIfNot`	:literal, :string	jump forward to given label if topmost stack value is not true

Tip

As highlighted in the example above, all commands listed here are to be used solely within an assemble call.

License

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.