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/* 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 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

__ashrdi3 (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.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;

}