Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/* ashrdi3.c extracted from gcc-2.95.2/libgcc2.c which is: */
/* Copyright (C) 1989, 92-98, 1999 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 License 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 License for more details.
 
You should have received a copy of the GNU General Public License
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 high, low;};
 
typedef union
{
  struct DIstruct s;
  DItype ll;
} DIunion;
 
DItype
__ashldi3 (DItype u, word_type b)
{
  DIunion w;
  word_type bm;
  DIunion uu;
 
  if (b == 0)
    return u;
 
  uu.ll = u;
 
  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
  if (bm <= 0)
    {
      w.s.low = 0;
      w.s.high = (USItype)uu.s.low << -bm;
    }
  else
    {
      USItype carries = (USItype)uu.s.low >> bm;
      w.s.low = (USItype)uu.s.low << b;
      w.s.high = ((USItype)uu.s.high << b) | carries;
    }
 
  return w.ll;
}