section .text
global _start:
  call do_work
  mov rax, 60
  mov rdi, r13
  syscall

do_work:
  mov r14, arrrrrr
  xor r15, r15
  xor r13, r13
  movsxd rax, dword [r14]
  jmp tst
  nop
lp:
  mov cl, byte [r14 + r15 + 0x8]
  and cl, 0xf
  add r13, rcx
  inc r15
tst:
  cmp r15, rax
  jl lp
  ret

arrrrrr:
  dd 134217728
  times 134217728 db 57h