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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [rl78/] [rl78-divmod.h] - Blame information for rev 849

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Line No. Rev Author Line
1 734 jeremybenn 
/* libgcc routines for RL78
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   Copyright (C) 2005, 2009, 2011
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   Free Software Foundation, Inc.
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   Contributed by Red Hat.
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   This file is part of GCC.
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   GCC is free software; you can redistribute it and/or modify it
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   under the terms of the GNU General Public License as published
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   by the Free Software Foundation; either version 3, or (at your
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   option) any later version.
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   GCC is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
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   License for more details.
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   Under Section 7 of GPL version 3, you are granted additional
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   permissions described in the GCC Runtime Library Exception, version
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   3.1, as published by the Free Software Foundation.
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   You should have received a copy of the GNU General Public License and
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   a copy of the GCC Runtime Library Exception along with this program;
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   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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   <http://www.gnu.org/licenses/>.  */
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UINT_TYPE C3(udivmod,NAME_MODE,4) (UINT_TYPE, UINT_TYPE, word_type);
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SINT_TYPE C3(__div,NAME_MODE,3)   (SINT_TYPE, SINT_TYPE);
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SINT_TYPE C3(__mod,NAME_MODE,3)   (SINT_TYPE, SINT_TYPE);
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UINT_TYPE C3(__udiv,NAME_MODE,3)  (UINT_TYPE, UINT_TYPE);
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UINT_TYPE C3(__umod,NAME_MODE,3)  (UINT_TYPE, UINT_TYPE);
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UINT_TYPE
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C3(udivmod,NAME_MODE,4) (UINT_TYPE num, UINT_TYPE den, word_type modwanted)
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{
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  UINT_TYPE bit = 1;
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  UINT_TYPE res = 0;
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  while (den < num && bit && !(den & (1L << BITS_MINUS_1)))
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    {
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      den <<= 1;
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      bit <<= 1;
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    }
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  while (bit)
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    {
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      if (num >= den)
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        {
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          num -= den;
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          res |= bit;
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        }
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      bit >>= 1;
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      den >>= 1;
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    }
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  if (modwanted)
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    return num;
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  return res;
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}
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SINT_TYPE
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C3(__div,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
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{
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  word_type neg = 0;
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  SINT_TYPE res;
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  if (a < 0)
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    {
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      a = -a;
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      neg = !neg;
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    }
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  if (b < 0)
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    {
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      b = -b;
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      neg = !neg;
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    }
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  res = C3(udivmod,NAME_MODE,4) (a, b, 0);
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  if (neg)
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    res = -res;
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  return res;
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}
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SINT_TYPE
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C3(__mod,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
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{
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  word_type neg = 0;
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  SINT_TYPE res;
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  if (a < 0)
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    {
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      a = -a;
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      neg = 1;
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    }
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  if (b < 0)
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    b = -b;
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  res = C3(udivmod,NAME_MODE,4) (a, b, 1);
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  if (neg)
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    res = -res;
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  return res;
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}
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UINT_TYPE
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C3(__udiv,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
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{
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  return C3(udivmod,NAME_MODE,4) (a, b, 0);
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}
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UINT_TYPE
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C3(__umod,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
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{
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  return C3(udivmod,NAME_MODE,4) (a, b, 1);
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}

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