gnu/dist/gcc4/gcc/config/m32c/m32c-lib2.c

   1 /* libgcc routines for R8C/M16C/M32C
   2    Copyright (C) 2005
   3    Free Software Foundation, Inc.
   4    Contributed by Red Hat.
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 2, or (at your
  11    option) any later version.
  12
  13    In addition to the permissions in the GNU General Public License,
  14    the Free Software Foundation gives you unlimited permission to link
  15    the compiled version of this file into combinations with other
  16    programs, and to distribute those combinations without any
  17    restriction coming from the use of this file.  (The General Public
  18    License restrictions do apply in other respects; for example, they
  19    cover modification of the file, and distribution when not linked
  20    into a combine executable.)
  21
  22    GCC is distributed in the hope that it will be useful, but WITHOUT
  23    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  24    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  25    License for more details.
  26
  27    You should have received a copy of the GNU General Public License
  28    along with GCC; see the file COPYING.  If not, write to the Free
  29    Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  30    02110-1301, USA.  */
  31
  32 typedef          int  HItype __attribute__ ((mode (HI)));
  33 typedef unsigned int UHItype __attribute__ ((mode (HI)));
  34 typedef          int  SItype __attribute__ ((mode (SI)));
  35 typedef unsigned int USItype __attribute__ ((mode (SI)));
  36
  37 typedef int word_type __attribute__ ((mode (__word__)));
  38
  39 USItype udivmodsi4 (USItype num, USItype den, word_type modwanted);
  40 SItype __divsi3 (SItype a, SItype b);
  41 SItype __modsi3 (SItype a, SItype b);
  42 SItype __udivsi3 (SItype a, SItype b);
  43 SItype __umodsi3 (SItype a, SItype b);
  44
  45 USItype
  46 udivmodsi4 (USItype num, USItype den, word_type modwanted)
  47 {
  48   USItype bit = 1;
  49   USItype res = 0;
  50
  51   while (den < num && bit && !(den & (1L << 31)))
  52     {
  53       den <<= 1;
  54       bit <<= 1;
  55     }
  56   while (bit)
  57     {
  58       if (num >= den)
  59         {
  60           num -= den;
  61           res |= bit;
  62         }
  63       bit >>= 1;
  64       den >>= 1;
  65     }
  66   if (modwanted)
  67     return num;
  68   return res;
  69 }
  70
  71
  72
  73 SItype
  74 __divsi3 (SItype a, SItype b)
  75 {
  76   word_type neg = 0;
  77   SItype res;
  78
  79   if (a < 0)
  80     {
  81       a = -a;
  82       neg = !neg;
  83     }
  84
  85   if (b < 0)
  86     {
  87       b = -b;
  88       neg = !neg;
  89     }
  90
  91   res = udivmodsi4 (a, b, 0);
  92
  93   if (neg)
  94     res = -res;
  95
  96   return res;
  97 }
  98
  99
 100
 101 SItype
 102 __modsi3 (SItype a, SItype b)
 103 {
 104   word_type neg = 0;
 105   SItype res;
 106
 107   if (a < 0)
 108     {
 109       a = -a;
 110       neg = 1;
 111     }
 112
 113   if (b < 0)
 114     b = -b;
 115
 116   res = udivmodsi4 (a, b, 1);
 117
 118   if (neg)
 119     res = -res;
 120
 121   return res;
 122 }
 123
 124
 125
 126
 127 SItype
 128 __udivsi3 (SItype a, SItype b)
 129 {
 130   return udivmodsi4 (a, b, 0);
 131 }
 132
 133
 134
 135 SItype
 136 __umodsi3 (SItype a, SItype b)
 137 {
 138   return udivmodsi4 (a, b, 1);
 139 }