libstdc++-v3/testsuite/ext/special_functions/airy_ai/check_value.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-options "-D__STDCPP_WANT_MATH_SPEC_FUNCS__" }
   3 //
   4 // Copyright (C) 2016-2017 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 //  airy_ai
  22
  23 //  Compare against values generated by the GNU Scientific Library.
  24 //  The GSL can be found on the web: http://www.gnu.org/software/gsl/
  25 #include <limits>
  26 #include <cmath>
  27 #if defined(__TEST_DEBUG)
  28 #  include <iostream>
  29 #  define VERIFY(A) \
  30   if (!(A)) \
  31     { \
  32       std::cout << "line " << __LINE__ \
  33         << "  max_abs_frac = " << max_abs_frac \
  34         << std::endl; \
  35     }
  36 #else
  37 #  include <testsuite_hooks.h>
  38 #endif
  39 #include <specfun_testcase.h>
  40
  41 // Test data.
  42 // max(|f - f_GSL|): 2.0261570199409107e-15 at index 0
  43 // max(|f - f_GSL| / |f_GSL|): 5.7527019513802774e-14
  44 // mean(f - f_GSL): 5.7893945880945940e-17
  45 // variance(f - f_GSL): 8.5887539970087062e-35
  46 // stddev(f - f_GSL): 9.2675530734971811e-18
  47 const testcase_airy_ai<double>
  48 data001[41] =
  49 {
  50   { 0.040241238486444071, -10.000000000000000, 0.0 },
  51   { 0.31910324771912801, -9.5000000000000000, 0.0 },
  52   { -0.022133721547341240, -9.0000000000000000, 0.0 },
  53   { -0.33029023763020882, -8.5000000000000000, 0.0 },
  54   { -0.052705050356385910, -8.0000000000000000, 0.0 },
  55   { 0.32177571638064789, -7.5000000000000000, 0.0 },
  56   { 0.18428083525050609, -7.0000000000000000, 0.0 },
  57   { -0.23802030199711663, -6.5000000000000000, 0.0 },
  58   { -0.32914517362982321, -6.0000000000000000, 0.0 },
  59   { 0.017781541276574383, -5.5000000000000000, 0.0 },
  60   { 0.35076100902411411, -5.0000000000000000, 0.0 },
  61   { 0.29215278105595921, -4.5000000000000000, 0.0 },
  62   { -0.070265532949289680, -4.0000000000000000, 0.0 },
  63   { -0.37553382314043182, -3.5000000000000000, 0.0 },
  64   { -0.37881429367765823, -3.0000000000000000, 0.0 },
  65   { -0.11232506769296607, -2.5000000000000000, 0.0 },
  66   { 0.22740742820168561, -2.0000000000000000, 0.0 },
  67   { 0.46425657774886947, -1.5000000000000000, 0.0 },
  68   { 0.53556088329235207, -1.0000000000000000, 0.0 },
  69   { 0.47572809161053958, -0.50000000000000000, 0.0 },
  70   { 0.35502805388781722, 0.0000000000000000, 0.0 },
  71   { 0.23169360648083348, 0.50000000000000000, 0.0 },
  72   { 0.13529241631288141, 1.0000000000000000, 0.0 },
  73   { 0.071749497008105428, 1.5000000000000000, 0.0 },
  74   { 0.034924130423274372, 2.0000000000000000, 0.0 },
  75   { 0.015725923380470481, 2.5000000000000000, 0.0 },
  76   { 0.0065911393574607175, 3.0000000000000000, 0.0 },
  77   { 0.0025840987869896349, 3.5000000000000000, 0.0 },
  78   { 0.00095156385120480195, 4.0000000000000000, 0.0 },
  79   { 0.00033025032351430934, 4.5000000000000000, 0.0 },
  80   { 0.00010834442813607434, 5.0000000000000000, 0.0 },
  81   { 3.3685311908599812e-05, 5.5000000000000000, 0.0 },
  82   { 9.9476943602528973e-06, 6.0000000000000000, 0.0 },
  83   { 2.7958823432049148e-06, 6.5000000000000000, 0.0 },
  84   { 7.4921288639971570e-07, 7.0000000000000000, 0.0 },
  85   { 1.9172560675134295e-07, 7.5000000000000000, 0.0 },
  86   { 4.6922076160992236e-08, 8.0000000000000000, 0.0 },
  87   { 1.0997009755195515e-08, 8.5000000000000000, 0.0 },
  88   { 2.4711684308724904e-09, 9.0000000000000000, 0.0 },
  89   { 5.3302637046174900e-10, 9.5000000000000000, 0.0 },
  90   { 1.1047532552898652e-10, 10.000000000000000, 0.0 },
  91 };
  92 const double toler001 = 5.0000000000000029e-12;
  93
  94 template<typename Ret, unsigned int Num>
  95   void
  96   test(const testcase_airy_ai<Ret> (&data)[Num], Ret toler)
  97   {
  98     bool test __attribute__((unused)) = true;
  99     const Ret eps = std::numeric_limits<Ret>::epsilon();
 100     Ret max_abs_diff = -Ret(1);
 101     Ret max_abs_frac = -Ret(1);
 102     unsigned int num_datum = Num;
 103     for (unsigned int i = 0; i < num_datum; ++i)
 104       {
 105         const Ret f = __gnu_cxx::airy_ai(data[i].x);
 106         const Ret f0 = data[i].f0;
 107         const Ret diff = f - f0;
 108         if (std::abs(diff) > max_abs_diff)
 109           max_abs_diff = std::abs(diff);
 110         if (std::abs(f0) > Ret(10) * eps
 111          && std::abs(f) > Ret(10) * eps)
 112           {
 113             const Ret frac = diff / f0;
 114             if (std::abs(frac) > max_abs_frac)
 115               max_abs_frac = std::abs(frac);
 116           }
 117       }
 118     VERIFY(max_abs_frac < toler);
 119   }
 120
 121 int
 122 main()
 123 {
 124   test(data001, toler001);
 125   return 0;
 126 }