libstdc++-v3/src/c++98/math_stubs_float.cc

   1 // Stub definitions for float math.
   2
   3 // Copyright (C) 2001-2018 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 #include <cmath>
  26
  27 // For targets which do not have support for float versions,
  28 // we use the following crude approximations. We keep saying that we'll do
  29 // better later, but never do.
  30
  31 extern "C"
  32 {
  33 #ifndef _GLIBCXX_HAVE_FABSF
  34   float
  35   fabsf(float x)
  36   {
  37     return (float) fabs(x);
  38   }
  39 #endif
  40
  41 #ifndef _GLIBCXX_HAVE_ACOSF
  42   float
  43   acosf(float x)
  44   {
  45     return (float) acos(x);
  46   }
  47 #endif
  48
  49 #ifndef _GLIBCXX_HAVE_ASINF
  50   float
  51   asinf(float x)
  52   {
  53     return (float) asin(x);
  54   }
  55 #endif
  56
  57 #ifndef _GLIBCXX_HAVE_ATANF
  58   float
  59   atanf(float x)
  60   {
  61     return (float) atan(x);
  62   }
  63 #endif
  64
  65 #ifndef _GLIBCXX_HAVE_ATAN2F
  66   float
  67   atan2f(float x, float y)
  68   {
  69     return (float) atan2(x, y);
  70   }
  71 #endif
  72
  73 #ifndef _GLIBCXX_HAVE_CEILF
  74   float
  75   ceilf(float x)
  76   {
  77     return (float) ceil(x);
  78   }
  79 #endif
  80
  81 #ifndef _GLIBCXX_HAVE_COSF
  82   float
  83   cosf(float x)
  84   {
  85     return (float) cos(x);
  86   }
  87 #endif
  88
  89 #ifndef _GLIBCXX_HAVE_COSHF
  90   float
  91   coshf(float x)
  92   {
  93     return (float) cosh(x);
  94   }
  95 #endif
  96
  97 #ifndef _GLIBCXX_HAVE_EXPF
  98   float
  99   expf(float x)
 100   {
 101     return (float) exp(x);
 102   }
 103 #endif
 104
 105 #ifndef _GLIBCXX_HAVE_FLOORF
 106   float
 107   floorf(float x)
 108   {
 109     return (float) floor(x);
 110   }
 111 #endif
 112
 113 #ifndef _GLIBCXX_HAVE_FMODF
 114   float
 115   fmodf(float x, float y)
 116   {
 117     return (float) fmod(x, y);
 118   }
 119 #endif
 120
 121 #ifndef _GLIBCXX_HAVE_FREXPF
 122   float
 123   frexpf(float x, int *exp)
 124   {
 125     return (float) frexp(x, exp);
 126   }
 127 #endif
 128
 129 #ifndef _GLIBCXX_HAVE_SQRTF
 130   float
 131   sqrtf(float x)
 132   {
 133     return (float) sqrt(x);
 134   }
 135 #endif
 136
 137 #ifndef _GLIBCXX_HAVE_HYPOTF
 138   float
 139   hypotf(float x, float y)
 140   {
 141     float s = fabsf(x) + fabsf(y);
 142     if (s == 0.0F)
 143       return s;
 144     x /= s; y /= s;
 145     return s * sqrtf(x * x + y * y);
 146   }
 147 #endif
 148
 149 #ifndef _GLIBCXX_HAVE_LDEXPF
 150   float
 151   ldexpf(float x, int exp)
 152   {
 153     return (float) ldexp(x, exp);
 154   }
 155 #endif
 156
 157 #ifndef _GLIBCXX_HAVE_LOGF
 158   float
 159   logf(float x)
 160   {
 161     return (float) log(x);
 162   }
 163 #endif
 164
 165 #ifndef _GLIBCXX_HAVE_LOG10F
 166   float
 167   log10f(float x)
 168   {
 169     return (float) log10(x);
 170   }
 171 #endif
 172
 173 #ifndef _GLIBCXX_HAVE_MODFF
 174   float
 175   modff(float x, float *iptr)
 176   {
 177     double result, temp;
 178
 179     result = modf(x, &temp);
 180     *iptr = (float) temp;
 181     return (float) result;
 182   }
 183 #endif
 184
 185 #ifndef _GLIBCXX_HAVE_POWF
 186   float
 187   powf(float x, float y)
 188   {
 189     return (float) pow(x, y);
 190   }
 191 #endif
 192
 193 #ifndef _GLIBCXX_HAVE_SINF
 194   float
 195   sinf(float x)
 196   {
 197     return (float) sin(x);
 198   }
 199 #endif
 200
 201 #ifndef _GLIBCXX_HAVE_SINHF
 202   float
 203   sinhf(float x)
 204   {
 205     return (float) sinh(x);
 206   }
 207 #endif
 208
 209 #ifndef _GLIBCXX_HAVE_TANF
 210   float
 211   tanf(float x)
 212   {
 213     return (float) tan(x);
 214   }
 215 #endif
 216
 217 #ifndef _GLIBCXX_HAVE_TANHF
 218   float
 219   tanhf(float x)
 220   {
 221     return (float) tanh(x);
 222   }
 223 #endif
 224 } // extern "C"