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/* libgcc routines for RL78
   Copyright (C) 2005, 2009, 2011
   Free Software Foundation, Inc.
   Contributed by Red Hat.
 
   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 3, or (at your
   option) any later version.
 
   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.
 
   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/>.  */
 
UINT_TYPE C3(udivmod,NAME_MODE,4) (UINT_TYPE, UINT_TYPE, word_type);
SINT_TYPE C3(__div,NAME_MODE,3)   (SINT_TYPE, SINT_TYPE);
SINT_TYPE C3(__mod,NAME_MODE,3)   (SINT_TYPE, SINT_TYPE);
UINT_TYPE C3(__udiv,NAME_MODE,3)  (UINT_TYPE, UINT_TYPE);
UINT_TYPE C3(__umod,NAME_MODE,3)  (UINT_TYPE, UINT_TYPE);
 
UINT_TYPE
C3(udivmod,NAME_MODE,4) (UINT_TYPE num, UINT_TYPE den, word_type modwanted)
{
  UINT_TYPE bit = 1;
  UINT_TYPE res = 0;
 
  while (den < num && bit && !(den & (1L << BITS_MINUS_1)))
    {
      den <<= 1;
      bit <<= 1;
    }
  while (bit)
    {
      if (num >= den)
	{
	  num -= den;
	  res |= bit;
	}
      bit >>= 1;
      den >>= 1;
    }
  if (modwanted)
    return num;
  return res;
}
 
SINT_TYPE
C3(__div,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
{
  word_type neg = 0;
  SINT_TYPE res;
 
  if (a < 0)
    {
      a = -a;
      neg = !neg;
    }
 
  if (b < 0)
    {
      b = -b;
      neg = !neg;
    }
 
  res = C3(udivmod,NAME_MODE,4) (a, b, 0);
 
  if (neg)
    res = -res;
 
  return res;
}
 
SINT_TYPE
C3(__mod,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
{
  word_type neg = 0;
  SINT_TYPE res;
 
  if (a < 0)
    {
      a = -a;
      neg = 1;
    }
 
  if (b < 0)
    b = -b;
 
  res = C3(udivmod,NAME_MODE,4) (a, b, 1);
 
  if (neg)
    res = -res;
 
  return res;
}
 
UINT_TYPE
C3(__udiv,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
{
  return C3(udivmod,NAME_MODE,4) (a, b, 0);
}
 
UINT_TYPE
C3(__umod,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
{
  return C3(udivmod,NAME_MODE,4) (a, b, 1);
}