/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
  /* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
  
  This file is part of GNU CC.
  
  GNU CC is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public Licence as published by
  the Free Software Foundation; either version 2, or (at your option)
  any later version.
  
  GNU CC is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public Licence for more details.
  
  You should have received a copy of the GNU General Public Licence
  along with GNU CC; see the file COPYING.  If not, write to
  the Free Software Foundation, 59 Temple Place - Suite 330,
  Boston, MA 02111-1307, USA.  */
  
  #define BITS_PER_UNIT 8
  
  typedef 	 int SItype	__attribute__((mode(SI)));
  typedef unsigned int USItype	__attribute__((mode(SI)));
  typedef		 int DItype	__attribute__((mode(DI)));
  typedef		 int word_type	__attribute__((mode(__word__)));
  
  struct DIstruct {
  	SItype low;
  	SItype high;
  };
  
  union DIunion {
  	struct DIstruct	s;
  	DItype		ll;
  };
  
  DItype __ashrdi3(DItype u, word_type b)
  {
  	union DIunion w;
  	union DIunion uu;
  	word_type bm;
  
  	if (b == 0)
  		return u;
  
  	uu.ll = u;
  
  	bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
  	if (bm <= 0) {
  		/* w.s.high = 1..1 or 0..0 */
  		w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1);
  		w.s.low = uu.s.high >> -bm;
  	} else {
  		USItype carries = (USItype)uu.s.high << bm;
  		w.s.high = uu.s.high >> b;
  		w.s.low = ((USItype)uu.s.low >> b) | carries;
  	}
  
  	return w.ll;
  }