FooVM

A Simple Bytecode Runtime

go get github.com/apkrieg/foovm

Description

This runtime was built at part of a contest with circle601 to see which runtime could run a set of example applications the fastest.

This runtime was the winner as it was the only runtime that could pass all the tests.

Update

This project hasn't been updated in a while and I don't think I will update it. I've kinda stepped away from Go because I don't like what Google has been doing with the language. I've started to use Rust more and more as my daily driver and have started development on FizzVM which is written in Rust and Assembly.

Hello World!

push 16        ; string heap index
push 0         ; string heap segment
push 12        ; string length
push 0         ; print call index
push 255       ; runtime call segment
call           ; call print
push 1         ; exit call index
push 255       ; runtime call segment
call           ; call exit
"Hello World!" ; "Hello World!" string

Bytecode Reference

Instruction	Mnemonic	Op Code	Description
Nil	nil	0x00	Nil pointer/no-op
Push	push	0x01	stack <- data
Pop	pop	0x02	<- stack
Load	load	0x03	Load data from heap to stack
Store	store	0x04	store data from stack to heap
Add	add	0x05	Add pop1 + pop2
Subtract	sub	0x06	Subtract pop1 - pop2
Multiply	mul	0x07	Multiply pop1 * pop2
Divide	div	0x08	Divide pop1 / pop2
Call	call	0x09	Call a function
Return	ret	0x0a	Return from function
Jump	jmp	0x0b	Jump to address
Compare	cmp	0x0c	Compare two values
Jump if Equal	jeq	0x0d	Jump if a == b
Jump if not Equal	jne	0x0e	Jump if a != b
Jump if Greater Than	jgt	0x0f	Jump if a > b
Jump if Less Than	jlt	0x10	Jump if a < b
Jump if Less Than or Equal	jle	0x11	Jump if a <= b
Jump if Greater Than or Equal	jge	0x12	Jump if a >= b