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/* libgcc routines for MeP.

   Copyright 2001, 2002, 2009 Free Software Foundation, Inc

This file 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 3 of the License, or (at your

option) any later version.

This file 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.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

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

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

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

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);

}