;;; fib.asm: A program that indefinitely generates the fibonacci
;;; numbers.  Using the registers to store the pairs of fibonacci
;;; numbers, we ensure only a finite memory space is necessary for
;;; this program to function, unlike a pure stack version.
  ;; Setup initial REG[0] = 1 and REG[1] = 1
  push.word 1
  mov.word 0
  push.word 1
  mov.word 1

  ;; Print REG[0] and REG[1]
  ;; Here is the loop back point `#`
  push.reg.word 0
  print.word
  push.byte '\n'
  print.char

  push.reg.word 1
  print.word
  push.byte '\n'
  print.char

  ;;  REG[0] += REG[1]
  push.reg.word 0
  push.reg.word 1
  plus.word
  mov.word 0

  ;;  REG[1] += REG[0]
  push.reg.word 0
  push.reg.word 1
  plus.word
  mov.word 1

  ;; Jump to `#`
  jump.abs 4
  halt