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;

}