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LASM (Lua Assembly) is what all Lua scripts eventually compile into. It is much more difficult to actually do anything in opposed to Lua, but you can do a lot more than in plain Lua. To learn about the opcodes and basic LASM code structure, please read the ANoFrillsIntroToLua51VMInstructions.pdf file by Kein-Hong man, available on -LuaForge- and in the etc\docs folder.

LAT (Lua Assembly Tools) LASM

LAT Lua Assembly is simple. There are three types of statements: Controls (beginning with a dot), Opcodes, and Comments. Constants can be automatically managed for you, strings are the same as in Lua, numbers can be in decimal, hexadecimal, binary, or octal, and can have underscores in them. Constants can either be a string (such as ‘print’), true, false, a number, or nil/null. The way to use a constant is, if it’s not a number, to just put it in code. You can also use a function-call like structure using “k”, “const”, or “constant”, e.g. k(7), or const’str’. To use a function by name, use the “p” or “proto” function, like so: p’FuncName’ or proto(FunctionX). Comments start with a semicolon ‘;’ and end with a newline.

The controls are as follows:

[ ] = optional, { } = required

name arguments description
.const {Constant} Loads a constant into the constant table.
.name {Identifier} Sets function name.
.options [Number upvalue count] [Number argument count] [Number vararg flag] [Number MaxStackSize]
.local {Identifier} Sets local name.
.upval, .upvalue {Identifier} Sets upvalue count.
.stacksize, .maxstacksize {Number} Sets MAXSTACKSIZE.
.vararg {Number} Sets the VARARG flag.
.params, .args or .argcount {Number} Number of arguments the function has
.func, .function [String name] Begins a new function in the current one.
.end Ends a function.

Opcode format:

Opcode name Argument A Argument B   Argument C
Opcode name Argument A Argument Bx
Opcode name Argument A Argument sBx

All opcode arguments, except C, are required. Opcode names are not case sensitive. An argument can either be a Number, a Constant (see above for the many ways to automanage them), a proto (see above for how to use them), or a number that starts with ‘$’ or ‘R’ or ‘r’
You don’t need to explicitly define the RETURN opcode at the end of a function, the LAT parser will automatically insert the default one if none is specified.