newlib-cygwin/newlib/libc/sys/mmixware/_exit.c

/* _exit for MMIXware.

   Copyright (C) 2001 Hans-Peter Nilsson.
   Permission to use, copy, modify, and distribute this software is freely
   granted, provided that this notice is preserved with no changes.
   THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   PURPOSE.  */

#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "sys/syscall.h"

void _exit (int n)
{
  /* Unfortunately, the return status is not returned by Knuth's mmix
     simulator, so it seems in effect ineffective.  We set it anyway;
     there may be a purpose.  */
  __asm__ ("SET $255,%0\n\tTRAP 0,0,0"
	   : /* No outputs.  */
	   : "r" (n)
	   : "memory");
}