Virtual Machine in Rust

Virtual Machine made in Rust.

Example

; This is a comment

label main: ; Heart of our program. This where code execution begins.

    mov rax, 10  ; Move into register rax the value of 10. Theres 4 user available registers 
                 ; and one program only register.
    mov rbx, 20 
    add rax, rbx ; Add register rax and rbx and store the value into rax 
                 ; Other math operations like sub, mul, div and mod also exist
    push rax     ; Push onto the stack
    pop rcx      ; Pop into rcx 

    cmp rcx rax  ; Compare. This sets flags based on the result
    je Equal     ; Jump if equal to label Equal
    
    halt         ; Halts the program (optional). If this is missing then the program 
                 ; executes the next label

label Equal:
    display rcx  ; Display the numeric value of rcx

Count to 10:

label main:
    
    mov rax, 0  ; Inital value
    mov rbx, 10 ; Final value 

    jmp loop
    

label loop:
    display rax
    cmp rax rbx
    add rax, 1 
    jne loop
    jl loop     ; Jump if less 
    ret

Look into examples for more examples. Note: make sure to run in the directory of the file you want to run. In other words, run the program in the examples folder to test them out. This issue will be fixed in the future.

Usage

bytecode <file-name>.basm