global _start

struc ellipse
  major: resd 1
  minor: resd 1
  area: resd 1
  circumference: resd 1
  eccentricity: resd 1
endstruc

section .data
e:
  istruc ellipse
    at major, dd 0
    at minor, dd 0
    at area, dd 0
    at circumference, dd 0
    at eccentricity, dd 0
  iend

section .rodata noexec nowrite align=4
pi: dd 3.141592653589793238462

section .text
_start:
  finit

  mov ebx, 100

; .repeat:
  lea edi, [rbx + 0]
  call print_uint32
  ; dec ebx
  ; jge .repeat

  xor edi, edi
  mov eax, 231
  syscall

  ; mov rax, 60
  ; mov rdi, 0

  ; syscall

; void print_uint32(uint32_t edi)
;
; https://stackoverflow.com/questions/13166064/how-do-i-print-an-integer-in-assembly-level-programming-without-printf-from-the
print_uint32:
  mov eax, edi

  mov ecx, 0xa
  push rcx
  mov rsi, rsp
  sub rsp, 16

.to_ascii_digit:
  xor edx, edx
  div ecx

  add edx, '0'
  dec rsi
  mov [rsi], dl

  test eax, eax
  jnz .to_ascii_digit

  mov eax, 1
  mov edi, 1
  lea edx, [rsp + 16 + 1]
  sub edx, esi
  syscall
  
  add rsp, 24
  ret