powm1_sqrtp1m1_test.cpp 3.2 KB

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  1. ///////////////////////////////////////////////////////////////
  2. // Copyright Christopher Kormanyos 2002 - 2011.
  3. // Copyright 2011 John Maddock. Distributed under the Boost
  4. // Software License, Version 1.0. (See accompanying file
  5. // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
  6. //
  7. // This work is based on an earlier work:
  8. // "Algorithm 910: A Portable C++ Multiple-Precision System for Special-Function Calculations",
  9. // in ACM TOMS, {VOL 37, ISSUE 4, (February 2011)} (C) ACM, 2011. http://doi.acm.org/10.1145/1916461.1916469
  10. #include "setup.hpp"
  11. #define BOOST_TEST_MAIN
  12. #include <boost/test/unit_test.hpp>
  13. #include <boost/test/floating_point_comparison.hpp>
  14. #include <boost/math/special_functions/math_fwd.hpp>
  15. #include "table_type.hpp"
  16. #include "libs/math/test/powm1_sqrtp1m1_test.hpp"
  17. //
  18. // DESCRIPTION:
  19. // ~~~~~~~~~~~~
  20. //
  21. // This file tests the functions log1p and expm1. The accuracy tests
  22. // use values generated with NTL::RR at 1000-bit precision
  23. // and our generic versions of these functions.
  24. //
  25. // Note that when this file is first run on a new platform many of
  26. // these tests will fail: the default accuracy is 1 epsilon which
  27. // is too tight for most platforms. In this situation you will
  28. // need to cast a human eye over the error rates reported and make
  29. // a judgement as to whether they are acceptable. Either way please
  30. // report the results to the Boost mailing list. Acceptable rates of
  31. // error are marked up below as a series of regular expressions that
  32. // identify the compiler/stdlib/platform/data-type/test-data/test-function
  33. // along with the maximum expected peek and RMS mean errors for that
  34. // test.
  35. //
  36. void expected_results()
  37. {
  38. //
  39. // Define the max and mean errors expected for
  40. // various compilers and platforms.
  41. //
  42. //
  43. // Catch all cases come last:
  44. //
  45. add_expected_result(
  46. ".*", // compiler
  47. ".*", // stdlib
  48. ".*", // platform
  49. ".*mpfr_float_backend<18>.*", // test type(s)
  50. ".*", // test data group
  51. ".*", // test function
  52. 300, // Max Peek error
  53. 50); // Max mean error
  54. add_expected_result(
  55. ".*", // compiler
  56. ".*", // stdlib
  57. ".*", // platform
  58. ".*", // test type(s)
  59. ".*", // test data group
  60. ".*", // test function
  61. 15, // Max Peek error
  62. 5); // Max mean error
  63. //
  64. // Finish off by printing out the compiler/stdlib/platform names,
  65. // we do this to make it easier to mark up expected error rates.
  66. //
  67. std::cout << "Tests run with " << BOOST_COMPILER << ", "
  68. << BOOST_STDLIB << ", " << BOOST_PLATFORM << std::endl;
  69. }
  70. template <class T>
  71. void test(T t, const char* p)
  72. {
  73. test_powm1_sqrtp1m1(t, p);
  74. }
  75. BOOST_AUTO_TEST_CASE(test_main)
  76. {
  77. using namespace boost::multiprecision;
  78. expected_results();
  79. //
  80. // We test two different precisions:
  81. // 18 decimal digits triggers Boost.Math's 64-bit long double support.
  82. // 30 decimal digits triggers Boost.Math's 128-bit long double support.
  83. // 35 decimal digits triggers true arbitrary precision support.
  84. //
  85. ALL_SMALL_TESTS
  86. }