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/gamma.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_gamma_data.ipp"
23
24 add_data(factorials);
25 add_data(near_0);
26 add_data(near_1);
27 add_data(near_2);
28 add_data(near_m10);
29 add_data(near_m55);
30
31 unsigned data_total = data.size();
32
33 screen_data([](const std::vector<double>& v){ return boost::math::lgamma(v[0]); }, [](const std::vector<double>& v){ return v[2]; });
34
35
36 #if defined(TEST_C99) && !defined(COMPILER_COMPARISON_TABLES)
37 screen_data([](const std::vector<double>& v){ return ::lgamma(v[0]); }, [](const std::vector<double>& v){ return v[2]; });
38 #endif
39 #if defined(TEST_LIBSTDCXX) && !defined(COMPILER_COMPARISON_TABLES)
40 screen_data([](const std::vector<double>& v){ return std::tr1::lgamma(v[0]); }, [](const std::vector<double>& v){ return v[2]; });
41 #endif
42 #if defined(TEST_GSL) && !defined(COMPILER_COMPARISON_TABLES)
43 screen_data([](const std::vector<double>& v){ return gsl_sf_lngamma(v[0]); }, [](const std::vector<double>& v){ return v[2]; });
44 #endif
45 #if defined(TEST_RMATH) && !defined(COMPILER_COMPARISON_TABLES)
46 screen_data([](const std::vector<double>& v){ return lgammafn(v[0]); }, [](const std::vector<double>& v){ return v[2]; });
47 #endif
48
49 unsigned data_used = data.size();
50 std::string function = "lgamma[br](" + boost::lexical_cast<std::string>(data_used) + "/" + boost::lexical_cast<std::string>(data_total) + " tests selected)";
51 std::string function_short = "lgamma";
52
53 double time = exec_timed_test([](const std::vector<double>& v){ return boost::math::lgamma(v[0]); });
54 std::cout << time << std::endl;
55 #if !defined(COMPILER_COMPARISON_TABLES) && (defined(TEST_GSL) || defined(TEST_RMATH) || defined(TEST_C99) || defined(TEST_LIBSTDCXX))
56 report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, boost_name());
57 #endif
58 report_execution_time(time, std::string("Compiler Comparison on ") + std::string(platform_name()), function_short, compiler_name() + std::string("[br]") + boost_name());
59 //
60 // Boost again, but with promotion to long double turned off:
61 //
62 #if !defined(COMPILER_COMPARISON_TABLES)
63 if(sizeof(long double) != sizeof(double))
64 {
65 double time = exec_timed_test([](const std::vector<double>& v){ return boost::math::lgamma(v[0], boost::math::policies::make_policy(boost::math::policies::promote_double<false>())); });
66 std::cout << time << std::endl;
67 #if !defined(COMPILER_COMPARISON_TABLES) && (defined(TEST_GSL) || defined(TEST_RMATH) || defined(TEST_C99) || defined(TEST_LIBSTDCXX))
68 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>");
69 #endif
70 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>");
71 }
72 #endif
73
74
75 #if defined(TEST_C99) && !defined(COMPILER_COMPARISON_TABLES)
76 time = exec_timed_test([](const std::vector<double>& v){ return ::lgamma(v[0]); });
77 std::cout << time << std::endl;
78 report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, "math.h");
79 #endif
80 #if defined(TEST_LIBSTDCXX) && !defined(COMPILER_COMPARISON_TABLES)
81 time = exec_timed_test([](const std::vector<double>& v){ return std::tr1::lgamma(v[0]); });
82 std::cout << time << std::endl;
83 report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, "tr1/cmath");
84 #endif
85 #if defined(TEST_GSL) && !defined(COMPILER_COMPARISON_TABLES)
86 time = exec_timed_test([](const std::vector<double>& v){ return gsl_sf_lngamma(v[0]); });
87 std::cout << time << std::endl;
88 report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, "GSL " GSL_VERSION);
89 #endif
90 #if defined(TEST_RMATH) && !defined(COMPILER_COMPARISON_TABLES)
91 time = exec_timed_test([](const std::vector<double>& v){ return lgammafn(v[0]); });
92 std::cout << time << std::endl;
93 report_execution_time(time, std::string("Library Comparison with ") + std::string(compiler_name()) + std::string(" on ") + platform_name(), function, "Rmath " R_VERSION_STRING);
94 #endif
95
96 return 0;
97 }
98
99