1 ///////////////////////////////////////////////////////////////////////////////
2 // Copyright 2012 John Maddock. Distributed under the Boost
3 // 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 : 4244)
8 #endif
9
10 #include <boost/polygon/detail/voronoi_predicates.hpp>
11 #include <boost/polygon/detail/voronoi_structures.hpp>
12 #include <boost/polygon/detail/skeleton_predicates.hpp>
13 #include <boost/random/mersenne_twister.hpp>
14 #include <boost/random/uniform_int_distribution.hpp>
15 #include <vector>
16 #include <map>
17 #include <boost/chrono.hpp>
18 #include <boost/multiprecision/cpp_int.hpp>
19
20 #ifdef TEST_GMP
21 #include <boost/multiprecision/gmp.hpp>
22 #endif
23 #ifdef TEST_TOMMATH
24 #include <boost/multiprecision/tommath.hpp>
25 #endif
26
27 #include "arithmetic_backend.hpp"
28
29 typedef boost::polygon::detail::point_2d<boost::int32_t> i_point;
30
31 template <class Clock>
32 struct stopwatch
33 {
34 typedef typename Clock::duration duration;
stopwatchstopwatch35 stopwatch()
36 {
37 m_start = Clock::now();
38 }
elapsedstopwatch39 duration elapsed()
40 {
41 return Clock::now() - m_start;
42 }
resetstopwatch43 void reset()
44 {
45 m_start = Clock::now();
46 }
47
48 private:
49 typename Clock::time_point m_start;
50 };
51
52 std::vector<i_point> points;
53 boost::random::mt19937 gen;
54
55 template <class Big>
56 struct cpp_int_voronoi_traits
57 {
58 typedef boost::int32_t int_type;
59 typedef boost::int64_t int_x2_type;
60 typedef boost::uint64_t uint_x2_type;
61 typedef Big big_int_type;
62 typedef double fpt_type;
63 typedef boost::polygon::detail::extended_exponent_fpt<fpt_type> efpt_type;
64 typedef boost::polygon::detail::ulp_comparison<fpt_type> ulp_cmp_type;
65 struct to_fpt_converter_type
66 {
67 template <class B, boost::multiprecision::expression_template_option ET>
operator ()cpp_int_voronoi_traits::to_fpt_converter_type68 double operator()(const boost::multiprecision::number<B, ET>& val)
69 {
70 return val.template convert_to<double>();
71 }
operator ()cpp_int_voronoi_traits::to_fpt_converter_type72 double operator()(double val)
73 {
74 return val;
75 }
operator ()cpp_int_voronoi_traits::to_fpt_converter_type76 double operator()(const efpt_type& that) const
77 {
78 return that.d();
79 }
80 template <class tag, class Arg1, class Arg2, class Arg3, class Arg4>
operator ()cpp_int_voronoi_traits::to_fpt_converter_type81 double operator()(const boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>& e)
82 {
83 typedef typename boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>::result_type r_t;
84 r_t r(e);
85 return r.template convert_to<double>();
86 }
87 };
88 struct to_efpt_converter_type
89 {
90 template <class B, boost::multiprecision::expression_template_option ET>
operator ()cpp_int_voronoi_traits::to_efpt_converter_type91 efpt_type operator()(const boost::multiprecision::number<B, ET>& val)
92 {
93 return efpt_type(val.template convert_to<double>(), 0);
94 }
operator ()cpp_int_voronoi_traits::to_efpt_converter_type95 efpt_type operator()(double val)
96 {
97 return efpt_type(val, 0);
98 }
99 template <class tag, class Arg1, class Arg2, class Arg3, class Arg4>
operator ()cpp_int_voronoi_traits::to_efpt_converter_type100 double operator()(const boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>& e)
101 {
102 typedef typename boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>::result_type r_t;
103 r_t r(e);
104 return efpt_type(r.template convert_to<double>(), 0);
105 }
106 };
107 };
108
109 template <class Big>
110 struct native_int_voronoi_traits
111 {
112 typedef boost::int32_t int_type;
113 typedef boost::int64_t int_x2_type;
114 typedef boost::uint64_t uint_x2_type;
115 typedef Big big_int_type;
116 typedef double fpt_type;
117 typedef boost::polygon::detail::extended_exponent_fpt<fpt_type> efpt_type;
118 typedef boost::polygon::detail::ulp_comparison<fpt_type> ulp_cmp_type;
119 struct to_fpt_converter_type
120 {
121 template <class T>
operator ()native_int_voronoi_traits::to_fpt_converter_type122 double operator()(const T& val) const
123 {
124 return val;
125 }
operator ()native_int_voronoi_traits::to_fpt_converter_type126 double operator()(const efpt_type& that) const
127 {
128 return that.d();
129 }
130 };
131 struct to_efpt_converter_type
132 {
133 template <class T>
operator ()native_int_voronoi_traits::to_efpt_converter_type134 efpt_type operator()(const T& val) const
135 {
136 return efpt_type(val, 0);
137 }
138 };
139 };
140
141 std::map<std::string, double> results;
142 double min_time = (std::numeric_limits<double>::max)();
143
144 template <class Traits>
test(const char * name)145 double test(const char* name)
146 {
147 typedef boost::polygon::detail::voronoi_predicates<Traits> preds;
148 typedef boost::polygon::detail::circle_event<boost::int32_t> circle_event;
149 typedef boost::polygon::detail::site_event<boost::int32_t> site_event;
150 typedef typename preds::template mp_circle_formation_functor<site_event, circle_event> circle_pred;
151
152 boost::random::uniform_int_distribution<> dist(0, points.size() - 1);
153 circle_pred pc;
154 circle_event event;
155
156 stopwatch<boost::chrono::high_resolution_clock> w;
157
158 for (unsigned i = 0; i < 10000; ++i)
159 {
160 site_event s1(points[dist(gen)]);
161 site_event s2(points[dist(gen)]);
162 site_event s3(points[dist(gen)]);
163 pc.ppp(s1, s2, s3, event);
164 pc.pps(s1, s2, s3, 0, event);
165 pc.pss(s1, s2, s3, 0, event);
166 pc.sss(s1, s2, s3, event);
167 }
168 double d = boost::chrono::duration_cast<boost::chrono::duration<double> >(w.elapsed()).count();
169 if (d < min_time)
170 min_time = d;
171 results[name] = d;
172 std::cout << "Time for " << std::setw(30) << std::left << name << " = " << d << std::endl;
173 return d;
174 }
175
generate_quickbook()176 void generate_quickbook()
177 {
178 std::cout << "[table\n[[Integer Type][Relative Performance (Actual time in parenthesis)]]\n";
179
180 std::map<std::string, double>::const_iterator i(results.begin()), j(results.end());
181
182 while (i != j)
183 {
184 double rel = i->second / min_time;
185 std::cout << "[[" << i->first << "][" << rel << "(" << i->second << "s)]]\n";
186 ++i;
187 }
188
189 std::cout << "]\n";
190 }
191
main()192 int main()
193 {
194 boost::random::uniform_int_distribution<> dist((std::numeric_limits<boost::int32_t>::min)() / 2, (std::numeric_limits<boost::int32_t>::max)() / 2);
195
196 for (unsigned i = 0; i < 100; ++i)
197 {
198 points.push_back(i_point(dist(gen), dist(gen)));
199 }
200
201 test<boost::polygon::detail::voronoi_ctype_traits<boost::int32_t> >("extended_int");
202
203 test<cpp_int_voronoi_traits<boost::multiprecision::int256_t> >("int256_t");
204 test<cpp_int_voronoi_traits<boost::multiprecision::int512_t> >("int512_t");
205 test<cpp_int_voronoi_traits<boost::multiprecision::int1024_t> >("int1024_t");
206
207 test<cpp_int_voronoi_traits<boost::multiprecision::checked_int256_t> >("checked_int256_t");
208 test<cpp_int_voronoi_traits<boost::multiprecision::checked_int512_t> >("checked_int512_t");
209 test<cpp_int_voronoi_traits<boost::multiprecision::checked_int1024_t> >("checked_int1024_t");
210
211 test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::cpp_int_backend<>, boost::multiprecision::et_off> > >("cpp_int");
212
213 #ifdef TEST_GMP
214 test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::gmp_int, boost::multiprecision::et_off> > >("mpz_int");
215 #endif
216 #ifdef TEST_TOMMATH
217 test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::tommath_int, boost::multiprecision::et_off> > >("tom_int");
218 #endif
219
220 generate_quickbook();
221
222 test<native_int_voronoi_traits<boost::int64_t> >("int64_t");
223 test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::arithmetic_backend<boost::int64_t>, boost::multiprecision::et_off> > >("number<arithmetic_backend<boost::int64_t>, et_off>");
224 //test<cpp_int_voronoi_traits<boost::multiprecision::number<boost::multiprecision::arithmetic_backend<boost::int64_t>, boost::multiprecision::et_on> > >("number<arithmetic_backend<boost::int64_t>, et_on>");
225
226 return 0;
227 }
228