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/* Copyright (C) 2005 Free Software Foundation,

This file is part of GCC.

GCC 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.

In addition to the permissions in the GNU General Public License, the

Free Software Foundation gives you unlimited permission to link the

compiled version of this file into combinations with other programs,

and to distribute those combinations without any restriction coming

from the use of this file.  (The General Public License restrictions

do apply in other respects; for example, they cover modification of

the file, and distribution when not linked into a combine

executable.)

GCC 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 GCC; see the file COPYING.  If not, write to the Free

Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.  */

#define BITS_PER_UNIT   8

typedef          int HItype             __attribute__ ((mode (HI)));

typedef unsigned int UHItype            __attribute__ ((mode (HI)));

typedef          int SItype             __attribute__ ((mode (SI)));

typedef unsigned int USItype            __attribute__ ((mode (SI)));

typedef int word_type                   __attribute__ ((mode (__word__)));

struct SIstruct {HItype low, high;};

typedef union

{

  struct SIstruct s;

  SItype ll;

} SIunion;

SItype

__lshrsi3 (SItype u, word_type b)

{

  SIunion w;

  word_type bm;

  SIunion uu;

  if (b == 0)

    return u;

  uu.ll = u;

  bm = (sizeof (HItype) * BITS_PER_UNIT) - b;

  if (bm <= 0)

    {

      w.s.high = 0;

      w.s.low = (UHItype)uu.s.high >> -bm;

    }

  else

    {

      UHItype carries = (UHItype)uu.s.high << bm;

      w.s.high = (UHItype)uu.s.high >> b;

      w.s.low = ((UHItype)uu.s.low >> b) | carries;

    }

  return w.ll;

}

SItype

__ashlsi3 (SItype u, word_type b)

{

  SIunion w;

  word_type bm;

  SIunion uu;

  if (b == 0)

    return u;

  uu.ll = u;

  bm = (sizeof (HItype) * BITS_PER_UNIT) - b;

  if (bm <= 0)

    {

      w.s.low = 0;

      w.s.high = (UHItype)uu.s.low << -bm;

    }

  else

    {

      UHItype carries = (UHItype)uu.s.low >> bm;

      w.s.low = (UHItype)uu.s.low << b;

      w.s.high = ((UHItype)uu.s.high << b) | carries;

    }

  return w.ll;

}

SItype

__ashrsi3 (SItype u, word_type b)

{

  SIunion w;

  word_type bm;

  SIunion uu;

  if (b == 0)

    return u;

  uu.ll = u;

  bm = (sizeof (HItype) * BITS_PER_UNIT) - b;

  if (bm <= 0)

    {

      /* w.s.high = 1..1 or 0..0 */

      w.s.high = uu.s.high >> (sizeof (HItype) * BITS_PER_UNIT - 1);

      w.s.low = uu.s.high >> -bm;

    }

  else

    {

      UHItype carries = (UHItype)uu.s.high << bm;

      w.s.high = uu.s.high >> b;

      w.s.low = ((UHItype)uu.s.low >> b) | carries;

    }

  return w.ll;

}

USItype

__mulsi3 (USItype a, USItype b)

{

  USItype c = 0;

  while (a != 0)

    {

      if (a & 1)

        c += b;

      a >>= 1;

      b <<= 1;

    }

  return c;

}

USItype

udivmodsi4(USItype num, USItype den, word_type modwanted)

{

  USItype bit = 1;

  USItype res = 0;

  while (den < num && bit && !(den & (1L<<31)))

    {

      den <<=1;

      bit <<=1;

    }

  while (bit)

    {

      if (num >= den)

        {

          num -= den;

          res |= bit;

        }

      bit >>=1;

      den >>=1;

    }

  if (modwanted) return num;

  return res;

}

SItype

__divsi3 (SItype a, SItype b)

{

  word_type neg = 0;

  SItype res;

  if (a < 0)

    {

      a = -a;

      neg = !neg;

    }

  if (b < 0)

    {

      b = -b;

      neg = !neg;

    }

  res = udivmodsi4 (a, b, 0);

  if (neg)

    res = -res;

  return res;

}

SItype

__modsi3 (SItype a, SItype b)

{

  word_type neg = 0;

  SItype res;

  if (a < 0)

    {

      a = -a;

      neg = 1;

    }

  if (b < 0)

    b = -b;

  res = udivmodsi4 (a, b, 1);

  if (neg)

    res = -res;

  return res;

}

SItype

__udivsi3 (SItype a, SItype b)

{

  return udivmodsi4 (a, b, 0);

}

SItype

__umodsi3 (SItype a, SItype b)

{

  return udivmodsi4 (a, b, 1);

}