1 // Copyright John Maddock 2013.
3 // Use, modification and distribution are subject to the
4 // Boost Software License, Version 1.0.
5 // (See accompanying file LICENSE_1_0.txt
6 // or copy at http://www.boost.org/LICENSE_1_0.txt)
9 #define _SCL_SECURE_NO_WARNINGS
12 #include <boost/multiprecision/cpp_bin_float.hpp>
14 #include <boost/multiprecision/mpfr.hpp>
16 #include <boost/random/mersenne_twister.hpp>
17 #include <boost/random/uniform_int.hpp>
18 #include "libs/multiprecision/test/test.hpp"
26 static boost::random::mt19937 gen;
29 while (val != prev_val)
38 static boost::random::uniform_int_distribution<e_type> ui(-20, 20);
39 return ldexp(val, ui(gen));
42 using namespace boost::multiprecision;
44 typedef number<mpfr_float_backend<35> > good_type;
46 typedef double good_type;
48 typedef number<cpp_bin_float<std::numeric_limits<good_type>::digits, digit_base_2>, et_off> test_type;
50 void test_special_cases()
52 test_type max_val = (std::numeric_limits<test_type>::max)();
53 test_type min_val = (std::numeric_limits<test_type>::min)();
54 test_type eps = std::numeric_limits<test_type>::epsilon();
55 test_type inf_val = (std::numeric_limits<test_type>::infinity)();
56 test_type nan_val = (std::numeric_limits<test_type>::quiet_NaN)();
58 test_type one_point_5 = 1.5;
60 BOOST_CHECK((boost::math::isnormal)(max_val));
61 BOOST_CHECK((boost::math::isnormal)(-max_val));
62 BOOST_CHECK((boost::math::isnormal)(min_val));
63 BOOST_CHECK((boost::math::isnormal)(-min_val));
64 BOOST_CHECK((boost::math::isinf)(inf_val));
65 BOOST_CHECK((boost::math::isinf)(-inf_val));
66 BOOST_CHECK((boost::math::isnan)(nan_val));
67 BOOST_CHECK((boost::math::isnan)(-nan_val));
69 if (std::numeric_limits<test_type>::has_denorm)
70 min_val = std::numeric_limits<test_type>::denorm_min();
72 // Adding epsilon will increment 1.0:
73 BOOST_CHECK(test_type(1) + eps != test_type(1));
74 BOOST_CHECK(test_type(1) + eps / 2 == test_type(1));
75 // But it's not the smallest value that will do that:
76 test_type small = 1 + eps;
77 small = ldexp(small, -std::numeric_limits<test_type>::digits);
78 BOOST_CHECK(test_type(1) + small != test_type(1));
79 // And if we increment 1.0 first, then an even smaller
80 // addition will round up:
81 test_type one_next = test_type(1) + eps;
82 BOOST_CHECK(one_next + eps / 2 != one_next);
85 BOOST_CHECK_EQUAL(max_val + max_val * eps, inf_val);
86 BOOST_CHECK_EQUAL(-max_val - max_val * eps, -inf_val);
87 BOOST_CHECK_EQUAL(max_val * 2, inf_val);
88 BOOST_CHECK_EQUAL(max_val * -2, -inf_val);
89 BOOST_CHECK_EQUAL(max_val / half, inf_val);
90 BOOST_CHECK_EQUAL(max_val / -half, -inf_val);
91 BOOST_CHECK_EQUAL(max_val / min_val, inf_val);
92 BOOST_CHECK_EQUAL(max_val / -min_val, -inf_val);
94 BOOST_CHECK_EQUAL(min_val * 2 - one_point_5 * min_val, 0);
95 BOOST_CHECK_EQUAL(-min_val * 2 + one_point_5 * min_val, 0);
96 BOOST_CHECK_EQUAL(min_val / 2, 0);
97 BOOST_CHECK_EQUAL(min_val / max_val, 0);
98 BOOST_CHECK_EQUAL(min_val * half, 0);
99 BOOST_CHECK_EQUAL(min_val - min_val, 0);
100 BOOST_CHECK_EQUAL(max_val - max_val, 0);
101 BOOST_CHECK_EQUAL(-min_val + min_val, 0);
102 BOOST_CHECK_EQUAL(-max_val + max_val, 0);
103 // Things which should not over/underflow:
104 BOOST_CHECK_EQUAL((min_val * 2) / 2, min_val);
105 BOOST_CHECK_EQUAL((max_val / 2) * 2, max_val);
106 BOOST_CHECK_GE((min_val * 2.0000001) / 1.9999999999999999, min_val);
107 BOOST_CHECK_LE((max_val / 2.0000001) * 1.9999999999999999, max_val);
108 BOOST_CHECK_EQUAL(min_val * 2 - min_val, min_val);
109 BOOST_CHECK_EQUAL(max_val / 2 + max_val / 2, max_val);
110 // Things involving zero:
111 BOOST_CHECK_EQUAL(max_val + 0, max_val);
112 BOOST_CHECK_EQUAL(max_val - 0, max_val);
113 BOOST_CHECK_EQUAL(0 + max_val, max_val);
114 BOOST_CHECK_EQUAL(0 - max_val, -max_val);
115 BOOST_CHECK_EQUAL(max_val * 0, 0);
116 BOOST_CHECK_EQUAL(0 * max_val, 0);
117 BOOST_CHECK_EQUAL(max_val / 0, inf_val);
118 BOOST_CHECK_EQUAL(0 / max_val, 0);
119 BOOST_CHECK_EQUAL(-max_val / 0, -inf_val);
120 BOOST_CHECK_EQUAL(0 / -max_val, 0);
121 // Things involving infinity:
122 BOOST_CHECK_EQUAL(inf_val + 2, inf_val);
123 BOOST_CHECK_EQUAL(inf_val - 2, inf_val);
124 BOOST_CHECK_EQUAL(inf_val + -2, inf_val);
125 BOOST_CHECK_EQUAL(inf_val - -2, inf_val);
126 BOOST_CHECK_EQUAL(-inf_val + 2, -inf_val);
127 BOOST_CHECK_EQUAL(-inf_val - 2, -inf_val);
128 BOOST_CHECK_EQUAL(-inf_val + -2, -inf_val);
129 BOOST_CHECK_EQUAL(-inf_val - -2, -inf_val);
131 BOOST_CHECK_EQUAL(2 + inf_val, inf_val);
132 BOOST_CHECK_EQUAL(2 - inf_val, -inf_val);
133 BOOST_CHECK_EQUAL(-2 + inf_val, inf_val);
134 BOOST_CHECK_EQUAL(-2 - inf_val, -inf_val);
135 BOOST_CHECK_EQUAL(2 + (-inf_val), -inf_val);
136 BOOST_CHECK_EQUAL(2 - (-inf_val), inf_val);
137 BOOST_CHECK_EQUAL(-2 + (-inf_val), -inf_val);
138 BOOST_CHECK_EQUAL(-2 - (-inf_val), inf_val);
140 BOOST_CHECK_EQUAL(sqrt(inf_val), inf_val);
141 BOOST_CHECK(boost::math::isnan(sqrt(-inf_val)));
143 BOOST_CHECK_EQUAL(inf_val + test_type(2), inf_val);
144 BOOST_CHECK_EQUAL(inf_val - test_type(2), inf_val);
145 BOOST_CHECK_EQUAL(inf_val + test_type(-2), inf_val);
146 BOOST_CHECK_EQUAL(inf_val - test_type(-2), inf_val);
147 BOOST_CHECK_EQUAL(-inf_val + test_type(2), -inf_val);
148 BOOST_CHECK_EQUAL(-inf_val - test_type(2), -inf_val);
149 BOOST_CHECK_EQUAL(-inf_val + test_type(-2), -inf_val);
150 BOOST_CHECK_EQUAL(-inf_val - test_type(-2), -inf_val);
152 BOOST_CHECK_EQUAL(test_type(2) + inf_val, inf_val);
153 BOOST_CHECK_EQUAL(test_type(2) - inf_val, -inf_val);
154 BOOST_CHECK_EQUAL(test_type(-2) + inf_val, inf_val);
155 BOOST_CHECK_EQUAL(test_type(-2) - inf_val, -inf_val);
156 BOOST_CHECK_EQUAL(test_type(2) + (-inf_val), -inf_val);
157 BOOST_CHECK_EQUAL(test_type(2) - (-inf_val), inf_val);
158 BOOST_CHECK_EQUAL(test_type(-2) + (-inf_val), -inf_val);
159 BOOST_CHECK_EQUAL(test_type(-2) - (-inf_val), inf_val);
161 BOOST_CHECK((boost::math::isnan)(inf_val - inf_val));
162 BOOST_CHECK_EQUAL(inf_val * 2, inf_val);
163 BOOST_CHECK_EQUAL(-inf_val * 2, -inf_val);
164 BOOST_CHECK_EQUAL(inf_val * -2, -inf_val);
165 BOOST_CHECK_EQUAL(-inf_val * -2, inf_val);
166 BOOST_CHECK_EQUAL(inf_val * test_type(-2), -inf_val);
167 BOOST_CHECK_EQUAL(-inf_val * test_type(-2), inf_val);
168 BOOST_CHECK((boost::math::isnan)(inf_val * 0));
169 BOOST_CHECK((boost::math::isnan)(-inf_val * 0));
170 BOOST_CHECK_EQUAL(inf_val / 2, inf_val);
171 BOOST_CHECK_EQUAL(-inf_val / 2, -inf_val);
172 BOOST_CHECK_EQUAL(inf_val / -2, -inf_val);
173 BOOST_CHECK_EQUAL(-inf_val / -2, inf_val);
174 BOOST_CHECK_EQUAL(inf_val / test_type(-2), -inf_val);
175 BOOST_CHECK_EQUAL(-inf_val / test_type(-2), inf_val);
176 BOOST_CHECK_EQUAL(inf_val / 0, inf_val);
177 BOOST_CHECK_EQUAL(-inf_val / 0, -inf_val);
178 BOOST_CHECK((boost::math::isnan)(inf_val / inf_val));
179 BOOST_CHECK((boost::math::isnan)(-inf_val / inf_val));
180 // Things involving nan:
181 BOOST_CHECK((boost::math::isnan)(nan_val + 2));
182 BOOST_CHECK((boost::math::isnan)(nan_val - 2));
183 BOOST_CHECK((boost::math::isnan)(nan_val + 0));
184 BOOST_CHECK((boost::math::isnan)(nan_val - 0));
185 BOOST_CHECK((boost::math::isnan)(nan_val + inf_val));
186 BOOST_CHECK((boost::math::isnan)(nan_val - inf_val));
187 BOOST_CHECK((boost::math::isnan)(nan_val + nan_val));
188 BOOST_CHECK((boost::math::isnan)(nan_val - nan_val));
189 BOOST_CHECK((boost::math::isnan)(2 + nan_val));
190 BOOST_CHECK((boost::math::isnan)(2 - nan_val));
191 BOOST_CHECK((boost::math::isnan)(0 - nan_val));
192 BOOST_CHECK((boost::math::isnan)(0 - nan_val));
193 BOOST_CHECK((boost::math::isnan)(inf_val + nan_val));
194 BOOST_CHECK((boost::math::isnan)(inf_val - nan_val));
195 BOOST_CHECK((boost::math::isnan)(nan_val * 2));
196 BOOST_CHECK((boost::math::isnan)(nan_val / 2));
197 BOOST_CHECK((boost::math::isnan)(nan_val * 0));
198 BOOST_CHECK((boost::math::isnan)(nan_val / 0));
199 BOOST_CHECK((boost::math::isnan)(nan_val * inf_val));
200 BOOST_CHECK((boost::math::isnan)(nan_val / inf_val));
201 BOOST_CHECK((boost::math::isnan)(nan_val * nan_val));
202 BOOST_CHECK((boost::math::isnan)(nan_val / nan_val));
203 BOOST_CHECK((boost::math::isnan)(2 * nan_val));
204 BOOST_CHECK((boost::math::isnan)(2 / nan_val));
205 BOOST_CHECK((boost::math::isnan)(0 / nan_val));
206 BOOST_CHECK((boost::math::isnan)(0 / nan_val));
207 BOOST_CHECK((boost::math::isnan)(inf_val * nan_val));
208 BOOST_CHECK((boost::math::isnan)(inf_val / nan_val));
210 BOOST_CHECK_EQUAL((max_val * half) / half, max_val);
211 BOOST_CHECK_EQUAL((max_val / 2) * 2, max_val);
212 BOOST_CHECK_EQUAL((min_val / half) * half, min_val);
213 BOOST_CHECK_EQUAL((min_val * 2) / 2, min_val);
214 BOOST_CHECK_EQUAL(max_val + min_val, max_val);
215 BOOST_CHECK_EQUAL(min_val + max_val, max_val);
216 BOOST_CHECK_EQUAL(max_val - min_val, max_val);
217 BOOST_CHECK_EQUAL(min_val - max_val, -max_val);
219 BOOST_CHECK(boost::math::signbit(min_val * -min_val));
220 BOOST_CHECK(boost::math::signbit(min_val * min_val) == 0);
221 BOOST_CHECK(boost::math::signbit(-min_val * -min_val) == 0);
222 BOOST_CHECK(boost::math::signbit(-min_val * min_val));
223 BOOST_CHECK(boost::math::signbit(min_val / max_val) == 0);
224 BOOST_CHECK(boost::math::signbit(min_val / -max_val));
225 BOOST_CHECK(boost::math::signbit(-min_val / -max_val) == 0);
226 BOOST_CHECK(boost::math::signbit(-min_val / max_val));
227 BOOST_CHECK(boost::math::signbit(min_val / 2) == 0);
228 BOOST_CHECK(boost::math::signbit(min_val / -2));
229 BOOST_CHECK(boost::math::signbit(-min_val / -2) == 0);
230 BOOST_CHECK(boost::math::signbit(-min_val / 2));
231 test_type neg_zero = min_val * -min_val;
233 // Arithmetic involving signed zero:
234 BOOST_CHECK_EQUAL(-neg_zero, 0);
235 BOOST_CHECK(!boost::math::signbit(-neg_zero));
236 BOOST_CHECK_EQUAL(neg_zero + 2, 2);
237 BOOST_CHECK_EQUAL(neg_zero + test_type(2), 2);
238 BOOST_CHECK_EQUAL(2 + neg_zero, 2);
239 BOOST_CHECK_EQUAL(test_type(2) + neg_zero, 2);
240 BOOST_CHECK_EQUAL(neg_zero + -2, -2);
241 BOOST_CHECK_EQUAL(neg_zero + test_type(-2), -2);
242 BOOST_CHECK_EQUAL(-2 + neg_zero, -2);
243 BOOST_CHECK_EQUAL(test_type(-2) + neg_zero, -2);
244 BOOST_CHECK_EQUAL(neg_zero - 2, -2);
245 BOOST_CHECK_EQUAL(neg_zero - test_type(2), -2);
246 BOOST_CHECK_EQUAL(2 - neg_zero, 2);
247 BOOST_CHECK_EQUAL(test_type(2) - neg_zero, 2);
248 BOOST_CHECK_EQUAL(neg_zero - -2, 2);
249 BOOST_CHECK_EQUAL(neg_zero - test_type(-2), 2);
250 BOOST_CHECK_EQUAL(-2 - neg_zero, -2);
251 BOOST_CHECK_EQUAL(test_type(-2) - neg_zero, -2);
252 BOOST_CHECK(!boost::math::signbit(test_type(2) + test_type(-2)));
253 BOOST_CHECK(!boost::math::signbit(test_type(2) - test_type(2)));
254 BOOST_CHECK(!boost::math::signbit(test_type(-2) - test_type(-2)));
255 BOOST_CHECK(!boost::math::signbit(test_type(-2) + test_type(2)));
256 BOOST_CHECK(!boost::math::signbit(zero + zero));
257 BOOST_CHECK(!boost::math::signbit(zero - zero));
258 BOOST_CHECK(!boost::math::signbit(neg_zero + zero));
259 BOOST_CHECK(!boost::math::signbit(zero + neg_zero));
260 BOOST_CHECK(boost::math::signbit(neg_zero + neg_zero));
261 BOOST_CHECK(boost::math::signbit(neg_zero - zero));
262 BOOST_CHECK(!boost::math::signbit(zero - neg_zero));
263 BOOST_CHECK(!boost::math::signbit(neg_zero - neg_zero));
265 BOOST_CHECK(!boost::math::signbit(floor(small)));
266 BOOST_CHECK(!boost::math::signbit(round(small)));
267 BOOST_CHECK(!boost::math::signbit(trunc(small)));
269 BOOST_CHECK(boost::math::signbit(ceil(small)));
270 BOOST_CHECK(boost::math::signbit(round(small)));
271 BOOST_CHECK(boost::math::signbit(trunc(small)));
273 BOOST_CHECK_EQUAL(neg_zero * 2, 0);
274 BOOST_CHECK_EQUAL(neg_zero * test_type(2), 0);
275 BOOST_CHECK_EQUAL(2 * neg_zero, 0);
276 BOOST_CHECK_EQUAL(test_type(2) * neg_zero, 0);
277 BOOST_CHECK_EQUAL(neg_zero * -2, 0);
278 BOOST_CHECK_EQUAL(neg_zero * test_type(-2), 0);
279 BOOST_CHECK_EQUAL(-2 * neg_zero, 0);
280 BOOST_CHECK_EQUAL(test_type(-2) * neg_zero, 0);
281 BOOST_CHECK(boost::math::signbit(neg_zero * 2));
282 BOOST_CHECK(boost::math::signbit(neg_zero * test_type(2)));
283 BOOST_CHECK(boost::math::signbit(2 * neg_zero));
284 BOOST_CHECK(boost::math::signbit(test_type(2) * neg_zero));
285 BOOST_CHECK(!boost::math::signbit(neg_zero * -2));
286 BOOST_CHECK(!boost::math::signbit(neg_zero * test_type(-2)));
287 BOOST_CHECK(!boost::math::signbit(-2 * neg_zero));
288 BOOST_CHECK(!boost::math::signbit(test_type(-2) * neg_zero));
290 BOOST_CHECK_EQUAL(neg_zero / 2, 0);
291 BOOST_CHECK_EQUAL(neg_zero / test_type(2), 0);
292 BOOST_CHECK_EQUAL(2 / neg_zero, -inf_val);
293 BOOST_CHECK_EQUAL(test_type(2) / neg_zero, -inf_val);
294 BOOST_CHECK_EQUAL(neg_zero / -2, 0);
295 BOOST_CHECK_EQUAL(neg_zero / test_type(-2), 0);
296 BOOST_CHECK_EQUAL(-2 / neg_zero, inf_val);
297 BOOST_CHECK_EQUAL(test_type(-2) / neg_zero, inf_val);
298 BOOST_CHECK(boost::math::signbit(neg_zero / 2));
299 BOOST_CHECK(boost::math::signbit(neg_zero / test_type(2)));
300 BOOST_CHECK(boost::math::signbit(2 / neg_zero));
301 BOOST_CHECK(boost::math::signbit(test_type(2) / neg_zero));
302 BOOST_CHECK(!boost::math::signbit(neg_zero / -2));
303 BOOST_CHECK(!boost::math::signbit(neg_zero / test_type(-2)));
304 BOOST_CHECK(!boost::math::signbit(-2 / neg_zero));
305 BOOST_CHECK(!boost::math::signbit(test_type(-2) / neg_zero));
307 BOOST_CHECK(boost::math::signbit(neg_zero.convert_to<double>()));
308 BOOST_CHECK(boost::math::signbit(neg_zero.convert_to<float>()));
309 BOOST_CHECK(boost::math::signbit(neg_zero.convert_to<long double>()));
310 BOOST_CHECK(!boost::math::signbit(zero.convert_to<double>()));
311 BOOST_CHECK(!boost::math::signbit(zero.convert_to<float>()));
312 BOOST_CHECK(!boost::math::signbit(zero.convert_to<long double>()));
314 // Conversions to other types of special values:
315 if (std::numeric_limits<float>::has_infinity)
317 BOOST_CHECK_EQUAL(inf_val.convert_to<float>(), std::numeric_limits<float>::infinity());
318 BOOST_CHECK_EQUAL((-inf_val).convert_to<float>(), -std::numeric_limits<float>::infinity());
320 if (std::numeric_limits<float>::has_quiet_NaN)
322 BOOST_CHECK((boost::math::isnan)(nan_val.convert_to<float>()));
324 if (std::numeric_limits<double>::has_infinity)
326 BOOST_CHECK_EQUAL(inf_val.convert_to<double>(), std::numeric_limits<double>::infinity());
327 BOOST_CHECK_EQUAL((-inf_val).convert_to<double>(), -std::numeric_limits<double>::infinity());
329 if (std::numeric_limits<double>::has_quiet_NaN)
331 BOOST_CHECK((boost::math::isnan)(nan_val.convert_to<double>()));
333 if (std::numeric_limits<long double>::has_infinity)
335 BOOST_CHECK_EQUAL(inf_val.convert_to<long double>(), std::numeric_limits<long double>::infinity());
336 BOOST_CHECK_EQUAL((-inf_val).convert_to<long double>(), -std::numeric_limits<long double>::infinity());
338 if (std::numeric_limits<long double>::has_quiet_NaN)
340 BOOST_CHECK((boost::math::isnan)(nan_val.convert_to<long double>()));
343 // Bug https://svn.boost.org/trac/boost/attachment/ticket/12580
347 test_type b = ldexp(test_type(0.99), -std::numeric_limits<test_type>::digits);
349 good_type gb = ldexp(good_type(0.99), -std::numeric_limits<good_type>::digits);
350 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
351 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
352 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
353 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
355 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
356 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
357 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
358 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
360 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
361 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
362 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
363 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
365 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
366 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
367 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
368 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
370 b = ldexp(test_type(0.5), -std::numeric_limits<test_type>::digits);
371 gb = ldexp(good_type(0.5), -std::numeric_limits<good_type>::digits);
372 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
373 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
374 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
375 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
377 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
378 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
379 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
380 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
382 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
383 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
384 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
385 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
387 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
388 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
389 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
390 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
392 b = ldexp(test_type(1), -std::numeric_limits<test_type>::digits);
393 gb = ldexp(good_type(1), -std::numeric_limits<good_type>::digits);
394 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
395 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
396 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
397 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
399 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
400 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
401 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
402 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
404 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
405 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
406 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
407 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
409 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
410 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
411 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
412 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
414 b = ldexp(test_type(0.50000000001), -std::numeric_limits<test_type>::digits);
415 gb = ldexp(good_type(0.50000000001), -std::numeric_limits<good_type>::digits);
416 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
417 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
418 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
419 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
421 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
422 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
423 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
424 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
426 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
427 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
428 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
429 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
431 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
432 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
433 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
434 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
436 a = a + ldexp(a, -20);
437 ga = ga + ldexp(ga, -20);
438 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
439 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
440 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
441 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
443 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
444 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
445 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
446 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
448 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
449 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
450 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
451 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
453 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
454 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
455 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
456 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
458 b = ldexp(test_type(0.5), -std::numeric_limits<test_type>::digits);
459 gb = ldexp(good_type(0.5), -std::numeric_limits<good_type>::digits);
460 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
461 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
462 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
463 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
465 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
466 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
467 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
468 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
470 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
471 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
472 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
473 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
475 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
476 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
477 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
478 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
480 b = ldexp(test_type(1), -std::numeric_limits<test_type>::digits);
481 gb = ldexp(good_type(1), -std::numeric_limits<good_type>::digits);
482 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
483 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
484 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
485 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
487 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
488 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
489 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
490 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
492 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
493 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
494 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
495 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
497 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
498 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
499 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
500 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
502 b = ldexp(test_type(0.50000000001), -std::numeric_limits<test_type>::digits);
503 gb = ldexp(good_type(0.50000000001), -std::numeric_limits<good_type>::digits);
504 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
505 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
506 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
507 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
509 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
510 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
511 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
512 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
514 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
515 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
516 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
517 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
519 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
520 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
521 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
522 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
525 a = boost::math::float_prior(a);
527 ga = boost::math::float_prior(ga);
528 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
529 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
530 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
531 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
533 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
534 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
535 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
536 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
538 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
539 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
540 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
541 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
543 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
544 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
545 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
546 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
548 b = ldexp(test_type(0.5), -std::numeric_limits<test_type>::digits);
549 gb = ldexp(good_type(0.5), -std::numeric_limits<good_type>::digits);
550 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
551 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
552 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
553 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
555 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
556 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
557 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
558 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
560 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
561 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
562 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
563 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
565 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
566 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
567 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
568 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
570 b = ldexp(test_type(1), -std::numeric_limits<test_type>::digits);
571 gb = ldexp(good_type(1), -std::numeric_limits<good_type>::digits);
572 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
573 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
574 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
575 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
577 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
578 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
579 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
580 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
582 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
583 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
584 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
585 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
587 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
588 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
589 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
590 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
592 b = ldexp(test_type(0.50000000001), -std::numeric_limits<test_type>::digits);
593 gb = ldexp(good_type(0.50000000001), -std::numeric_limits<good_type>::digits);
594 BOOST_CHECK_EQUAL(good_type(test_type(a - b)), good_type(ga - gb));
595 BOOST_CHECK_EQUAL(good_type(test_type(b - a)), good_type(gb - ga));
596 BOOST_CHECK_EQUAL(good_type(test_type(a + b)), good_type(ga + gb));
597 BOOST_CHECK_EQUAL(good_type(test_type(b + a)), good_type(gb + ga));
599 BOOST_CHECK_EQUAL(good_type(test_type(a - -b)), good_type(ga - -gb));
600 BOOST_CHECK_EQUAL(good_type(test_type(b - -a)), good_type(gb - -ga));
601 BOOST_CHECK_EQUAL(good_type(test_type(a + -b)), good_type(ga + -gb));
602 BOOST_CHECK_EQUAL(good_type(test_type(b + -a)), good_type(gb + -ga));
604 BOOST_CHECK_EQUAL(good_type(test_type(-a - b)), good_type(-ga - gb));
605 BOOST_CHECK_EQUAL(good_type(test_type(-b - a)), good_type(-gb - ga));
606 BOOST_CHECK_EQUAL(good_type(test_type(-a + b)), good_type(-ga + gb));
607 BOOST_CHECK_EQUAL(good_type(test_type(-b + a)), good_type(-gb + ga));
609 BOOST_CHECK_EQUAL(good_type(test_type(-a - -b)), good_type(-ga - -gb));
610 BOOST_CHECK_EQUAL(good_type(test_type(-b - -a)), good_type(-gb - -ga));
611 BOOST_CHECK_EQUAL(good_type(test_type(-a + -b)), good_type(-ga + -gb));
612 BOOST_CHECK_EQUAL(good_type(test_type(-b + -a)), good_type(-gb + -ga));
617 test_special_cases();
618 unsigned error_count = 0;
619 for (unsigned i = 0; i < 100000; ++i)
621 good_type a = generate_random<good_type>();
622 good_type b = generate_random<good_type>();
626 BOOST_CHECK_EQUAL(test_type(a * b), ta * tb);
627 BOOST_CHECK_EQUAL(test_type(-a * b), -ta * tb);
628 BOOST_CHECK_EQUAL(test_type(a * -b), ta * -tb);
629 BOOST_CHECK_EQUAL(test_type(-a * -b), -ta * -tb);
631 BOOST_CHECK_EQUAL(test_type(a + b), ta + tb);
632 BOOST_CHECK_EQUAL(test_type(-a + b), -ta + tb);
633 BOOST_CHECK_EQUAL(test_type(a + -b), ta + -tb);
634 BOOST_CHECK_EQUAL(test_type(-a + -b), -ta + -tb);
636 BOOST_CHECK_EQUAL(test_type(a - b), ta - tb);
637 BOOST_CHECK_EQUAL(test_type(-a - b), -ta - tb);
638 BOOST_CHECK_EQUAL(test_type(a - -b), ta - -tb);
639 BOOST_CHECK_EQUAL(test_type(-a - -b), -ta - -tb);
641 BOOST_CHECK_EQUAL(test_type(a / b), ta / tb);
642 BOOST_CHECK_EQUAL(test_type(-a / b), -ta / tb);
643 BOOST_CHECK_EQUAL(test_type(a / -b), ta / -tb);
644 BOOST_CHECK_EQUAL(test_type(-a / -b), -ta / -tb);
646 BOOST_CHECK_EQUAL(test_type(sqrt(a)), sqrt(ta));
647 BOOST_CHECK_EQUAL(test_type(floor(a)), floor(ta));
648 BOOST_CHECK_EQUAL(test_type(floor(-a)), floor(-ta));
649 BOOST_CHECK_EQUAL(test_type(ceil(a)), ceil(ta));
650 BOOST_CHECK_EQUAL(test_type(ceil(-a)), ceil(-ta));
656 BOOST_CHECK_EQUAL(a.convert_to<double>(), ta.convert_to<double>());
657 BOOST_CHECK_EQUAL(a.convert_to<float>(), ta.convert_to<float>());
658 BOOST_CHECK_EQUAL(b.convert_to<double>(), tb.convert_to<double>());
659 BOOST_CHECK_EQUAL(b.convert_to<float>(), tb.convert_to<float>());
661 BOOST_CHECK_EQUAL(a, ta.convert_to<double>());
662 BOOST_CHECK_EQUAL(static_cast<float>(a), ta.convert_to<float>());
663 BOOST_CHECK_EQUAL(b, tb.convert_to<double>());
664 BOOST_CHECK_EQUAL(static_cast<float>(b), tb.convert_to<float>());
667 static boost::random::mt19937 i_gen;
670 BOOST_CHECK_EQUAL(test_type(a * si), ta * si);
671 BOOST_CHECK_EQUAL(test_type(-a * si), -ta * si);
672 BOOST_CHECK_EQUAL(test_type(-a * -si), -ta * -si);
673 BOOST_CHECK_EQUAL(test_type(a * -si), ta * -si);
674 unsigned ui = std::abs(si);
675 BOOST_CHECK_EQUAL(test_type(a * ui), ta * ui);
676 BOOST_CHECK_EQUAL(test_type(-a * ui), -ta * ui);
679 BOOST_CHECK_EQUAL(test_type(a / si), ta / si);
680 BOOST_CHECK_EQUAL(test_type(-a / si), -ta / si);
681 BOOST_CHECK_EQUAL(test_type(-a / -si), -ta / -si);
682 BOOST_CHECK_EQUAL(test_type(a / -si), ta / -si);
683 BOOST_CHECK_EQUAL(test_type(a / ui), ta / ui);
684 BOOST_CHECK_EQUAL(test_type(-a / ui), -ta / ui);
686 if (boost::detail::test_errors() != error_count)
688 error_count = boost::detail::test_errors();
689 std::cout << std::setprecision(std::numeric_limits<test_type>::max_digits10) << std::scientific;
690 std::cout << "a (mpfr) = " << a << std::endl;
691 std::cout << "a (test) = " << ta << std::endl;
692 std::cout << "b (mpfr) = " << b << std::endl;
693 std::cout << "b (test) = " << tb << std::endl;
694 std::cout << "si = " << si << std::endl;
695 std::cout << "ui = " << ui << std::endl;
698 return boost::report_errors();