sim/m32c/blinky.S

   1 ;;; blinky.S --- sample program to blink LED's on M32C simulator
   2 ;;;
   3 ;;; Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011
   4         Free Software Foundation, Inc.
   5 ;;; Contributed by Red Hat, Inc.
   6 ;;;
   7 ;;; This file is part of the GNU simulators.
   8 ;;;
   9 ;;; This program is free software; you can redistribute it and/or modify
  10 ;;; it under the terms of the GNU General Public License as published by
  11 ;;; the Free Software Foundation; either version 3 of the License, or
  12 ;;; (at your option) any later version.
  13 ;;;
  14 ;;; This program is distributed in the hope that it will be useful,
  15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;;; GNU General Public License for more details.
  18 ;;;
  19 ;;; You should have received a copy of the GNU General Public License
  20 ;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21
  22         .text
  23
  24         .global _start
  25 _start:
  26         mov.w   #0xe1,a0
  27 top:
  28         sub.w   #1,r0
  29         mov.b   r0h,[a0]
  30
  31         mov.w   #1000,r1
  32 loop:
  33         adjnz.w #-1,r1,loop
  34
  35         jmp.w   top