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1 //  Copyright John Maddock 2015.
2 //  Use, modification and distribution are subject to the
3 //  Boost Software License, Version 1.0. (See accompanying file
4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5 
6 #ifdef _MSC_VER
7 #  pragma warning (disable : 4224)
8 #endif
9 
10 #include <boost/math/special_functions/expm1.hpp>
11 #include <boost/array.hpp>
12 #include <boost/lexical_cast.hpp>
13 #include "../../test/table_type.hpp"
14 #include "table_helper.hpp"
15 #include "performance.hpp"
16 #include <iostream>
17 
main()18 int main()
19 {
20    typedef double T;
21 #define SC_(x) static_cast<double>(x)
22 #  include "../../test/log1p_expm1_data.ipp"
23 
24    add_data(log1p_expm1_data);
25 
26    unsigned data_total = data.size();
27 
28    screen_data([](const std::vector<double>& v){  return boost::math::expm1(v[0]);  }, [](const std::vector<double>& v){ return v[2];  });
29 
30 
31 #if defined(TEST_C99) && !defined(COMPILER_COMPARISON_TABLES)
32    screen_data([](const std::vector<double>& v){  return ::expm1(v[0]);  }, [](const std::vector<double>& v){ return v[2];  });
33 #endif
34 #if defined(TEST_LIBSTDCXX) && !defined(COMPILER_COMPARISON_TABLES)
35    screen_data([](const std::vector<double>& v){  return std::tr1::expm1(v[0]);  }, [](const std::vector<double>& v){ return v[2];  });
36 #endif
37 
38    unsigned data_used = data.size();
39    std::string function = "expm1[br](" + boost::lexical_cast<std::string>(data_used) + "/" + boost::lexical_cast<std::string>(data_total) + " tests selected)";
40    std::string function_short = "expm1";
41 
42    double time = exec_timed_test([](const std::vector<double>& v){  return boost::math::expm1(v[0]);  });
43    std::cout << time << std::endl;
44 #if !defined(COMPILER_COMPARISON_TABLES) && (defined(TEST_GSL) || defined(TEST_RMATH) || defined(TEST_C99) || defined(TEST_LIBSTDCXX))
45    report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, boost_name());
46 #endif
47    report_execution_time(time, std::string("Compiler Comparison on ") + std::string(platform_name()), function_short, compiler_name() + std::string("[br]") + boost_name());
48    //
49    // Boost again, but with promotion to long double turned off:
50    //
51 #if !defined(COMPILER_COMPARISON_TABLES)
52    if(sizeof(long double) != sizeof(double))
53    {
54       double time = exec_timed_test([](const std::vector<double>& v){  return boost::math::expm1(v[0], boost::math::policies::make_policy(boost::math::policies::promote_double<false>()));  });
55       std::cout << time << std::endl;
56 #if !defined(COMPILER_COMPARISON_TABLES) && (defined(TEST_GSL) || defined(TEST_RMATH) || defined(TEST_C99) || defined(TEST_LIBSTDCXX))
57       report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, boost_name() + "[br]promote_double<false>");
58 #endif
59       report_execution_time(time, std::string("Compiler Comparison on ") + std::string(platform_name()), function_short, compiler_name() + std::string("[br]") + boost_name() + "[br]promote_double<false>");
60    }
61 #endif
62 
63 
64 #if defined(TEST_C99) && !defined(COMPILER_COMPARISON_TABLES)
65    time = exec_timed_test([](const std::vector<double>& v){  return ::expm1(v[0]);  });
66    std::cout << time << std::endl;
67    report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, "math.h");
68 #endif
69 #if defined(TEST_LIBSTDCXX) && !defined(COMPILER_COMPARISON_TABLES)
70    time = exec_timed_test([](const std::vector<double>& v){  return std::tr1::expm1(v[0]);  });
71    std::cout << time << std::endl;
72    report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, "tr1/cmath");
73 #endif
74 
75 
76    return 0;
77 }
78 
79