Compiler nasm output example

fake-language-input.js

var a = 10;
var b = 15;
var c = a + b;
print(c);

output.asm

section .bss
    digitSpace resb 100
    digitSpacePos resb 8
    a resb 32
    b resb 32
    c resb 32


section .text
    global _start

_start:
     mov rax, 10
     mov [a], rax

     mov rax, 15
     mov [b], rax

     mov rax, [a]
     mov rbx, [b]
     add rax, rbx
     mov [c], rax

     mov rax, [c]
     call _printRAX

     mov rax, 60
     mov rdi, 0
     syscall


_printRAX:
     mov rcx, digitSpace
     mov rbx, 10
     mov [rcx], rbx
     inc rcx
     mov [digitSpacePos], rcx

_printRAXLoop:
     mov rdx, 0
     mov rbx, 10
     div rbx
     push rax
     add rdx, 48

     mov rcx, [digitSpacePos]
     mov [rcx], dl
     inc rcx
     mov [digitSpacePos], rcx

     pop rax
     cmp rax, 0
     jne _printRAXLoop

_printRAXLoop2:
     mov rcx, [digitSpacePos]

     mov rax, 1
     mov rdi, 1
     mov rsi, rcx
     mov rdx, 1
     syscall

     mov rcx, [digitSpacePos]
     dec rcx
     mov [digitSpacePos], rcx

     cmp rcx, digitSpace
     jge _printRAXLoop2

     ret