global _start

; Program that finds the highest number in the byte array declared below

section .data
  data: db 0, 15, 57, 2, 43, 87, 2
  dataSize: equ 7

section .bss

section .text
_start:
  xor rbx, rbx
  xor rcx, rcx
  mov rax, 1 ; iterator value
  mov cl, byte [data] ; default value for the result

loop_start:
  cmp rax, dataSize
  jge loop_end

  mov bl, byte [rax + data] ; load next candidate
  cmp cl, bl   ; compare to (default) value
  jge loop_inc ; skip if cl >= bl
  mov cl, bl   ; set higher value

loop_inc:
  inc rax
  jmp loop_start

loop_end:
  mov rax, 60
  mov rdi, rcx ; return the highest number as exit code
  syscall