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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [m32c/] [m32c-lib2.c] - Blame information for rev 282

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1 282 jeremybenn
/* libgcc routines for R8C/M16C/M32C
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   Copyright (C) 2005, 2009
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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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typedef          int  sint32_type   __attribute__ ((mode (SI)));
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typedef unsigned int  uint32_type   __attribute__ ((mode (SI)));
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typedef int           word_type     __attribute__ ((mode (__word__)));
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uint32_type udivmodsi4 (uint32_type, uint32_type, word_type);
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sint32_type __divsi3   (sint32_type, sint32_type);
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sint32_type __modsi3   (sint32_type, sint32_type);
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uint32_type
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udivmodsi4 (uint32_type num, uint32_type den, word_type modwanted)
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{
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  uint32_type bit = 1;
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  uint32_type res = 0;
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  while (den < num && bit && !(den & (1L << 31)))
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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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sint32_type
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__divsi3 (sint32_type a, sint32_type b)
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{
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  word_type neg = 0;
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  sint32_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 = udivmodsi4 (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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sint32_type
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__modsi3 (sint32_type a, sint32_type b)
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{
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  word_type neg = 0;
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  sint32_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 = udivmodsi4 (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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/* See the comment by the definition of LIBGCC2_UNITS_PER_WORD in
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   m32c.h for why we are creating extra versions of some of the
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   functions defined in libgcc2.c.  */
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#define LIBGCC2_UNITS_PER_WORD 2
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#define L_clzsi2
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#define L_ctzsi2
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#define L_ffssi2
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#define L_paritysi2
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#define L_popcountsi2
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#include "libgcc2.c"
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uint32_type
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__udivsi3 (uint32_type a, uint32_type b)
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{
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  return udivmodsi4 (a, b, 0);
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}
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uint32_type
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__umoddi3 (uint32_type a, uint32_type b)
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{
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  return udivmodsi4 (a, b, 1);
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}

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