libcxx/test/std/numerics/c.math/cmath.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // This test fails because Clang no longer enables -fdelayed-template-parsing
  10 // by default on Windows with C++20 (#69431).
  11 // XFAIL: msvc && (clang-18 || clang-19 || clang-20)
  12
  13 // <cmath>
  14
  15 #include <cmath>
  16 #include <array>
  17 #include <cassert>
  18 #include <limits>
  19 #include <type_traits>
  20 #include <utility>
  21
  22 #include "fp_compare.h"
  23 #include "test_macros.h"
  24 #include "hexfloat.h"
  25 #include "truncate_fp.h"
  26 #include "type_algorithms.h"
  27
  28 // convertible to int/float/double/etc
  29 template <class T, int N=0>
  30 struct Value {
  31     operator T () { return T(N); }
  32 };
  33
  34 // See PR21083
  35 // Ambiguous is a user-defined type that defines its own overloads of cmath
  36 // functions. When the std overloads are candidates too (by using or adl),
  37 // they should not interfere.
  38 struct Ambiguous : std::true_type { // ADL
  39     operator float () { return 0.f; }
  40     operator double () { return 0.; }
  41 };
  42 Ambiguous abs(Ambiguous){ return Ambiguous(); }
  43 Ambiguous acos(Ambiguous){ return Ambiguous(); }
  44 Ambiguous asin(Ambiguous){ return Ambiguous(); }
  45 Ambiguous atan(Ambiguous){ return Ambiguous(); }
  46 Ambiguous atan2(Ambiguous, Ambiguous){ return Ambiguous(); }
  47 Ambiguous ceil(Ambiguous){ return Ambiguous(); }
  48 Ambiguous cos(Ambiguous){ return Ambiguous(); }
  49 Ambiguous cosh(Ambiguous){ return Ambiguous(); }
  50 Ambiguous exp(Ambiguous){ return Ambiguous(); }
  51 Ambiguous fabs(Ambiguous){ return Ambiguous(); }
  52 Ambiguous floor(Ambiguous){ return Ambiguous(); }
  53 Ambiguous fmod(Ambiguous, Ambiguous){ return Ambiguous(); }
  54 Ambiguous frexp(Ambiguous, int*){ return Ambiguous(); }
  55 Ambiguous ldexp(Ambiguous, int){ return Ambiguous(); }
  56 Ambiguous log(Ambiguous){ return Ambiguous(); }
  57 Ambiguous log10(Ambiguous){ return Ambiguous(); }
  58 Ambiguous modf(Ambiguous, Ambiguous*){ return Ambiguous(); }
  59 Ambiguous pow(Ambiguous, Ambiguous){ return Ambiguous(); }
  60 Ambiguous sin(Ambiguous){ return Ambiguous(); }
  61 Ambiguous sinh(Ambiguous){ return Ambiguous(); }
  62 Ambiguous sqrt(Ambiguous){ return Ambiguous(); }
  63 Ambiguous tan(Ambiguous){ return Ambiguous(); }
  64 Ambiguous tanh(Ambiguous){ return Ambiguous(); }
  65 Ambiguous signbit(Ambiguous){ return Ambiguous(); }
  66 Ambiguous fpclassify(Ambiguous){ return Ambiguous(); }
  67 Ambiguous isfinite(Ambiguous){ return Ambiguous(); }
  68 Ambiguous isnormal(Ambiguous){ return Ambiguous(); }
  69 Ambiguous isgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
  70 Ambiguous isgreaterequal(Ambiguous, Ambiguous){ return Ambiguous(); }
  71 Ambiguous isless(Ambiguous, Ambiguous){ return Ambiguous(); }
  72 Ambiguous islessequal(Ambiguous, Ambiguous){ return Ambiguous(); }
  73 Ambiguous islessgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
  74 Ambiguous isunordered(Ambiguous, Ambiguous){ return Ambiguous(); }
  75 Ambiguous acosh(Ambiguous){ return Ambiguous(); }
  76 Ambiguous asinh(Ambiguous){ return Ambiguous(); }
  77 Ambiguous atanh(Ambiguous){ return Ambiguous(); }
  78 Ambiguous cbrt(Ambiguous){ return Ambiguous(); }
  79 Ambiguous copysign(Ambiguous, Ambiguous){ return Ambiguous(); }
  80 Ambiguous erf(Ambiguous){ return Ambiguous(); }
  81 Ambiguous erfc(Ambiguous){ return Ambiguous(); }
  82 Ambiguous exp2(Ambiguous){ return Ambiguous(); }
  83 Ambiguous expm1(Ambiguous){ return Ambiguous(); }
  84 Ambiguous fdim(Ambiguous, Ambiguous){ return Ambiguous(); }
  85 Ambiguous fma(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
  86 Ambiguous fmax(Ambiguous, Ambiguous){ return Ambiguous(); }
  87 Ambiguous fmin(Ambiguous, Ambiguous){ return Ambiguous(); }
  88 Ambiguous hypot(Ambiguous, Ambiguous){ return Ambiguous(); }
  89 Ambiguous hypot(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
  90 Ambiguous ilogb(Ambiguous){ return Ambiguous(); }
  91 Ambiguous lerp(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
  92 Ambiguous lgamma(Ambiguous){ return Ambiguous(); }
  93 Ambiguous llrint(Ambiguous){ return Ambiguous(); }
  94 Ambiguous llround(Ambiguous){ return Ambiguous(); }
  95 Ambiguous log1p(Ambiguous){ return Ambiguous(); }
  96 Ambiguous log2(Ambiguous){ return Ambiguous(); }
  97 Ambiguous logb(Ambiguous){ return Ambiguous(); }
  98 Ambiguous lrint(Ambiguous){ return Ambiguous(); }
  99 Ambiguous lround(Ambiguous){ return Ambiguous(); }
 100 Ambiguous nearbyint(Ambiguous){ return Ambiguous(); }
 101 Ambiguous nextafter(Ambiguous, Ambiguous){ return Ambiguous(); }
 102 Ambiguous nexttoward(Ambiguous, Ambiguous){ return Ambiguous(); }
 103 Ambiguous remainder(Ambiguous, Ambiguous){ return Ambiguous(); }
 104 Ambiguous remquo(Ambiguous, Ambiguous, int*){ return Ambiguous(); }
 105 Ambiguous rint(Ambiguous){ return Ambiguous(); }
 106 Ambiguous round(Ambiguous){ return Ambiguous(); }
 107 Ambiguous scalbln(Ambiguous, Ambiguous){ return Ambiguous(); }
 108 Ambiguous scalbn(Ambiguous, Ambiguous){ return Ambiguous(); }
 109 Ambiguous tgamma(Ambiguous){ return Ambiguous(); }
 110 Ambiguous trunc(Ambiguous){ return Ambiguous(); }
 111
 112 template <class T, class = decltype(std::abs(std::declval<T>()))>
 113 std::true_type has_abs_imp(int);
 114 template <class T>
 115 std::false_type has_abs_imp(...);
 116
 117 template <class T>
 118 struct has_abs : decltype(has_abs_imp<T>(0)) {};
 119
 120 void test_abs()
 121 {
 122     // See also "abs.pass.cpp"
 123
 124     TEST_DIAGNOSTIC_PUSH
 125     TEST_CLANG_DIAGNOSTIC_IGNORED("-Wabsolute-value")
 126
 127     static_assert((std::is_same<decltype(std::abs((float)0)), float>::value), "");
 128     static_assert((std::is_same<decltype(std::abs((double)0)), double>::value), "");
 129     static_assert((std::is_same<decltype(std::abs((long double)0)), long double>::value), "");
 130     static_assert((std::is_same<decltype(std::abs((int)0)), int>::value), "");
 131     static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), "");
 132     static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), "");
 133     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
 134     static_assert((std::is_same<decltype(std::abs((unsigned short)0)), int>::value), "");
 135     static_assert((std::is_same<decltype(std::abs((signed char)0)), int>::value), "");
 136     static_assert((std::is_same<decltype(std::abs((short)0)), int>::value), "");
 137     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
 138     static_assert((std::is_same<decltype(std::abs((char)0)), int>::value), "");
 139     static_assert((std::is_same<decltype(abs(Ambiguous())), Ambiguous>::value), "");
 140
 141     static_assert(!has_abs<unsigned>::value, "");
 142     static_assert(!has_abs<unsigned long>::value, "");
 143     static_assert(!has_abs<unsigned long long>::value, "");
 144     static_assert(!has_abs<std::size_t>::value, "");
 145
 146     TEST_DIAGNOSTIC_POP
 147
 148     assert(std::abs(-1.) == 1);
 149 }
 150
 151
 152 void test_acos()
 153 {
 154     static_assert((std::is_same<decltype(std::acos((float)0)), float>::value), "");
 155     static_assert((std::is_same<decltype(std::acos((bool)0)), double>::value), "");
 156     static_assert((std::is_same<decltype(std::acos((unsigned short)0)), double>::value), "");
 157     static_assert((std::is_same<decltype(std::acos((int)0)), double>::value), "");
 158     static_assert((std::is_same<decltype(std::acos((unsigned int)0)), double>::value), "");
 159     static_assert((std::is_same<decltype(std::acos((long)0)), double>::value), "");
 160     static_assert((std::is_same<decltype(std::acos((unsigned long)0)), double>::value), "");
 161     static_assert((std::is_same<decltype(std::acos((long long)0)), double>::value), "");
 162     static_assert((std::is_same<decltype(std::acos((unsigned long long)0)), double>::value), "");
 163     static_assert((std::is_same<decltype(std::acos((double)0)), double>::value), "");
 164     static_assert((std::is_same<decltype(std::acos((long double)0)), long double>::value), "");
 165     static_assert((std::is_same<decltype(std::acosf(0)), float>::value), "");
 166     static_assert((std::is_same<decltype(std::acosl(0)), long double>::value), "");
 167     static_assert((std::is_same<decltype(acos(Ambiguous())), Ambiguous>::value), "");
 168     assert(std::acos(1) == 0);
 169 }
 170
 171 void test_asin()
 172 {
 173     static_assert((std::is_same<decltype(std::asin((float)0)), float>::value), "");
 174     static_assert((std::is_same<decltype(std::asin((bool)0)), double>::value), "");
 175     static_assert((std::is_same<decltype(std::asin((unsigned short)0)), double>::value), "");
 176     static_assert((std::is_same<decltype(std::asin((int)0)), double>::value), "");
 177     static_assert((std::is_same<decltype(std::asin((unsigned int)0)), double>::value), "");
 178     static_assert((std::is_same<decltype(std::asin((long)0)), double>::value), "");
 179     static_assert((std::is_same<decltype(std::asin((unsigned long)0)), double>::value), "");
 180     static_assert((std::is_same<decltype(std::asin((long long)0)), double>::value), "");
 181     static_assert((std::is_same<decltype(std::asin((unsigned long long)0)), double>::value), "");
 182     static_assert((std::is_same<decltype(std::asin((double)0)), double>::value), "");
 183     static_assert((std::is_same<decltype(std::asin((long double)0)), long double>::value), "");
 184     static_assert((std::is_same<decltype(std::asinf(0)), float>::value), "");
 185     static_assert((std::is_same<decltype(std::asinl(0)), long double>::value), "");
 186     static_assert((std::is_same<decltype(asin(Ambiguous())), Ambiguous>::value), "");
 187     assert(std::asin(0) == 0);
 188 }
 189
 190 void test_atan()
 191 {
 192     static_assert((std::is_same<decltype(std::atan((float)0)), float>::value), "");
 193     static_assert((std::is_same<decltype(std::atan((bool)0)), double>::value), "");
 194     static_assert((std::is_same<decltype(std::atan((unsigned short)0)), double>::value), "");
 195     static_assert((std::is_same<decltype(std::atan((int)0)), double>::value), "");
 196     static_assert((std::is_same<decltype(std::atan((unsigned int)0)), double>::value), "");
 197     static_assert((std::is_same<decltype(std::atan((long)0)), double>::value), "");
 198     static_assert((std::is_same<decltype(std::atan((unsigned long)0)), double>::value), "");
 199     static_assert((std::is_same<decltype(std::atan((long long)0)), double>::value), "");
 200     static_assert((std::is_same<decltype(std::atan((unsigned long long)0)), double>::value), "");
 201     static_assert((std::is_same<decltype(std::atan((double)0)), double>::value), "");
 202     static_assert((std::is_same<decltype(std::atan((long double)0)), long double>::value), "");
 203     static_assert((std::is_same<decltype(std::atanf(0)), float>::value), "");
 204     static_assert((std::is_same<decltype(std::atanl(0)), long double>::value), "");
 205     static_assert((std::is_same<decltype(atan(Ambiguous())), Ambiguous>::value), "");
 206     assert(std::atan(0) == 0);
 207 }
 208
 209 void test_atan2()
 210 {
 211     static_assert((std::is_same<decltype(std::atan2((float)0, (float)0)), float>::value), "");
 212     static_assert((std::is_same<decltype(std::atan2((bool)0, (float)0)), double>::value), "");
 213     static_assert((std::is_same<decltype(std::atan2((unsigned short)0, (double)0)), double>::value), "");
 214     static_assert((std::is_same<decltype(std::atan2((int)0, (long double)0)), long double>::value), "");
 215     static_assert((std::is_same<decltype(std::atan2((float)0, (unsigned int)0)), double>::value), "");
 216     static_assert((std::is_same<decltype(std::atan2((double)0, (long)0)), double>::value), "");
 217     static_assert((std::is_same<decltype(std::atan2((long double)0, (unsigned long)0)), long double>::value), "");
 218     static_assert((std::is_same<decltype(std::atan2((int)0, (long long)0)), double>::value), "");
 219     static_assert((std::is_same<decltype(std::atan2((int)0, (unsigned long long)0)), double>::value), "");
 220     static_assert((std::is_same<decltype(std::atan2((double)0, (double)0)), double>::value), "");
 221     static_assert((std::is_same<decltype(std::atan2((long double)0, (long double)0)), long double>::value), "");
 222     static_assert((std::is_same<decltype(std::atan2((float)0, (double)0)), double>::value), "");
 223     static_assert((std::is_same<decltype(std::atan2((float)0, (long double)0)), long double>::value), "");
 224     static_assert((std::is_same<decltype(std::atan2((double)0, (long double)0)), long double>::value), "");
 225     static_assert((std::is_same<decltype(std::atan2f(0,0)), float>::value), "");
 226     static_assert((std::is_same<decltype(std::atan2l(0,0)), long double>::value), "");
 227     static_assert((std::is_same<decltype(std::atan2((int)0, (int)0)), double>::value), "");
 228     static_assert((std::is_same<decltype(atan2(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 229     assert(std::atan2(0,1) == 0);
 230 }
 231
 232 void test_ceil()
 233 {
 234     static_assert((std::is_same<decltype(std::ceil((float)0)), float>::value), "");
 235     static_assert((std::is_same<decltype(std::ceil((bool)0)), double>::value), "");
 236     static_assert((std::is_same<decltype(std::ceil((unsigned short)0)), double>::value), "");
 237     static_assert((std::is_same<decltype(std::ceil((int)0)), double>::value), "");
 238     static_assert((std::is_same<decltype(std::ceil((unsigned int)0)), double>::value), "");
 239     static_assert((std::is_same<decltype(std::ceil((long)0)), double>::value), "");
 240     static_assert((std::is_same<decltype(std::ceil((unsigned long)0)), double>::value), "");
 241     static_assert((std::is_same<decltype(std::ceil((long long)0)), double>::value), "");
 242     static_assert((std::is_same<decltype(std::ceil((unsigned long long)0)), double>::value), "");
 243     static_assert((std::is_same<decltype(std::ceil((double)0)), double>::value), "");
 244     static_assert((std::is_same<decltype(std::ceil((long double)0)), long double>::value), "");
 245     static_assert((std::is_same<decltype(std::ceilf(0)), float>::value), "");
 246     static_assert((std::is_same<decltype(std::ceill(0)), long double>::value), "");
 247     static_assert((std::is_same<decltype(ceil(Ambiguous())), Ambiguous>::value), "");
 248     assert(std::ceil(0) == 0);
 249 }
 250
 251 void test_cos()
 252 {
 253     static_assert((std::is_same<decltype(std::cos((float)0)), float>::value), "");
 254     static_assert((std::is_same<decltype(std::cos((bool)0)), double>::value), "");
 255     static_assert((std::is_same<decltype(std::cos((unsigned short)0)), double>::value), "");
 256     static_assert((std::is_same<decltype(std::cos((int)0)), double>::value), "");
 257     static_assert((std::is_same<decltype(std::cos((unsigned int)0)), double>::value), "");
 258     static_assert((std::is_same<decltype(std::cos((long)0)), double>::value), "");
 259     static_assert((std::is_same<decltype(std::cos((unsigned long)0)), double>::value), "");
 260     static_assert((std::is_same<decltype(std::cos((long long)0)), double>::value), "");
 261     static_assert((std::is_same<decltype(std::cos((unsigned long long)0)), double>::value), "");
 262     static_assert((std::is_same<decltype(std::cos((double)0)), double>::value), "");
 263     static_assert((std::is_same<decltype(std::cos((long double)0)), long double>::value), "");
 264     static_assert((std::is_same<decltype(std::cosf(0)), float>::value), "");
 265     static_assert((std::is_same<decltype(std::cosl(0)), long double>::value), "");
 266     static_assert((std::is_same<decltype(cos(Ambiguous())), Ambiguous>::value), "");
 267     assert(std::cos(0) == 1);
 268 }
 269
 270 void test_cosh()
 271 {
 272     static_assert((std::is_same<decltype(std::cosh((float)0)), float>::value), "");
 273     static_assert((std::is_same<decltype(std::cosh((bool)0)), double>::value), "");
 274     static_assert((std::is_same<decltype(std::cosh((unsigned short)0)), double>::value), "");
 275     static_assert((std::is_same<decltype(std::cosh((int)0)), double>::value), "");
 276     static_assert((std::is_same<decltype(std::cosh((unsigned int)0)), double>::value), "");
 277     static_assert((std::is_same<decltype(std::cosh((long)0)), double>::value), "");
 278     static_assert((std::is_same<decltype(std::cosh((unsigned long)0)), double>::value), "");
 279     static_assert((std::is_same<decltype(std::cosh((long long)0)), double>::value), "");
 280     static_assert((std::is_same<decltype(std::cosh((unsigned long long)0)), double>::value), "");
 281     static_assert((std::is_same<decltype(std::cosh((double)0)), double>::value), "");
 282     static_assert((std::is_same<decltype(std::cosh((long double)0)), long double>::value), "");
 283     static_assert((std::is_same<decltype(std::coshf(0)), float>::value), "");
 284     static_assert((std::is_same<decltype(std::coshl(0)), long double>::value), "");
 285     static_assert((std::is_same<decltype(cosh(Ambiguous())), Ambiguous>::value), "");
 286     assert(std::cosh(0) == 1);
 287 }
 288
 289 void test_exp()
 290 {
 291     static_assert((std::is_same<decltype(std::exp((float)0)), float>::value), "");
 292     static_assert((std::is_same<decltype(std::exp((bool)0)), double>::value), "");
 293     static_assert((std::is_same<decltype(std::exp((unsigned short)0)), double>::value), "");
 294     static_assert((std::is_same<decltype(std::exp((int)0)), double>::value), "");
 295     static_assert((std::is_same<decltype(std::exp((unsigned int)0)), double>::value), "");
 296     static_assert((std::is_same<decltype(std::exp((long)0)), double>::value), "");
 297     static_assert((std::is_same<decltype(std::exp((unsigned long)0)), double>::value), "");
 298     static_assert((std::is_same<decltype(std::exp((long long)0)), double>::value), "");
 299     static_assert((std::is_same<decltype(std::exp((unsigned long long)0)), double>::value), "");
 300     static_assert((std::is_same<decltype(std::exp((double)0)), double>::value), "");
 301     static_assert((std::is_same<decltype(std::exp((long double)0)), long double>::value), "");
 302     static_assert((std::is_same<decltype(std::expf(0)), float>::value), "");
 303     static_assert((std::is_same<decltype(std::expl(0)), long double>::value), "");
 304     static_assert((std::is_same<decltype(exp(Ambiguous())), Ambiguous>::value), "");
 305     assert(std::exp(0) == 1);
 306 }
 307
 308 void test_fabs()
 309 {
 310     static_assert((std::is_same<decltype(std::fabs((float)0)), float>::value), "");
 311     static_assert((std::is_same<decltype(std::fabs((bool)0)), double>::value), "");
 312     static_assert((std::is_same<decltype(std::fabs((unsigned short)0)), double>::value), "");
 313     static_assert((std::is_same<decltype(std::fabs((int)0)), double>::value), "");
 314     static_assert((std::is_same<decltype(std::fabs((unsigned int)0)), double>::value), "");
 315     static_assert((std::is_same<decltype(std::fabs((long)0)), double>::value), "");
 316     static_assert((std::is_same<decltype(std::fabs((unsigned long)0)), double>::value), "");
 317     static_assert((std::is_same<decltype(std::fabs((long long)0)), double>::value), "");
 318     static_assert((std::is_same<decltype(std::fabs((unsigned long long)0)), double>::value), "");
 319     static_assert((std::is_same<decltype(std::fabs((double)0)), double>::value), "");
 320     static_assert((std::is_same<decltype(std::fabs((long double)0)), long double>::value), "");
 321     static_assert((std::is_same<decltype(std::fabsf(0.0f)), float>::value), "");
 322     static_assert((std::is_same<decltype(std::fabsl(0.0L)), long double>::value), "");
 323     static_assert((std::is_same<decltype(fabs(Ambiguous())), Ambiguous>::value), "");
 324     assert(std::fabs(-1) == 1);
 325 }
 326
 327 void test_floor()
 328 {
 329     static_assert((std::is_same<decltype(std::floor((float)0)), float>::value), "");
 330     static_assert((std::is_same<decltype(std::floor((bool)0)), double>::value), "");
 331     static_assert((std::is_same<decltype(std::floor((unsigned short)0)), double>::value), "");
 332     static_assert((std::is_same<decltype(std::floor((int)0)), double>::value), "");
 333     static_assert((std::is_same<decltype(std::floor((unsigned int)0)), double>::value), "");
 334     static_assert((std::is_same<decltype(std::floor((long)0)), double>::value), "");
 335     static_assert((std::is_same<decltype(std::floor((unsigned long)0)), double>::value), "");
 336     static_assert((std::is_same<decltype(std::floor((long long)0)), double>::value), "");
 337     static_assert((std::is_same<decltype(std::floor((unsigned long long)0)), double>::value), "");
 338     static_assert((std::is_same<decltype(std::floor((double)0)), double>::value), "");
 339     static_assert((std::is_same<decltype(std::floor((long double)0)), long double>::value), "");
 340     static_assert((std::is_same<decltype(std::floorf(0)), float>::value), "");
 341     static_assert((std::is_same<decltype(std::floorl(0)), long double>::value), "");
 342     static_assert((std::is_same<decltype(floor(Ambiguous())), Ambiguous>::value), "");
 343     assert(std::floor(1) == 1);
 344 }
 345
 346 void test_fmod()
 347 {
 348     static_assert((std::is_same<decltype(std::fmod((float)0, (float)0)), float>::value), "");
 349     static_assert((std::is_same<decltype(std::fmod((bool)0, (float)0)), double>::value), "");
 350     static_assert((std::is_same<decltype(std::fmod((unsigned short)0, (double)0)), double>::value), "");
 351     static_assert((std::is_same<decltype(std::fmod((int)0, (long double)0)), long double>::value), "");
 352     static_assert((std::is_same<decltype(std::fmod((float)0, (unsigned int)0)), double>::value), "");
 353     static_assert((std::is_same<decltype(std::fmod((double)0, (long)0)), double>::value), "");
 354     static_assert((std::is_same<decltype(std::fmod((long double)0, (unsigned long)0)), long double>::value), "");
 355     static_assert((std::is_same<decltype(std::fmod((int)0, (long long)0)), double>::value), "");
 356     static_assert((std::is_same<decltype(std::fmod((int)0, (unsigned long long)0)), double>::value), "");
 357     static_assert((std::is_same<decltype(std::fmod((double)0, (double)0)), double>::value), "");
 358     static_assert((std::is_same<decltype(std::fmod((long double)0, (long double)0)), long double>::value), "");
 359     static_assert((std::is_same<decltype(std::fmod((float)0, (double)0)), double>::value), "");
 360     static_assert((std::is_same<decltype(std::fmod((float)0, (long double)0)), long double>::value), "");
 361     static_assert((std::is_same<decltype(std::fmod((double)0, (long double)0)), long double>::value), "");
 362     static_assert((std::is_same<decltype(std::fmodf(0,0)), float>::value), "");
 363     static_assert((std::is_same<decltype(std::fmodl(0,0)), long double>::value), "");
 364     static_assert((std::is_same<decltype(std::fmod((int)0, (int)0)), double>::value), "");
 365     static_assert((std::is_same<decltype(fmod(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 366     assert(std::fmod(1.5,1) == .5);
 367 }
 368
 369 void test_frexp()
 370 {
 371     int ip;
 372     static_assert((std::is_same<decltype(std::frexp((float)0, &ip)), float>::value), "");
 373     static_assert((std::is_same<decltype(std::frexp((bool)0, &ip)), double>::value), "");
 374     static_assert((std::is_same<decltype(std::frexp((unsigned short)0, &ip)), double>::value), "");
 375     static_assert((std::is_same<decltype(std::frexp((int)0, &ip)), double>::value), "");
 376     static_assert((std::is_same<decltype(std::frexp((unsigned int)0, &ip)), double>::value), "");
 377     static_assert((std::is_same<decltype(std::frexp((long)0, &ip)), double>::value), "");
 378     static_assert((std::is_same<decltype(std::frexp((unsigned long)0, &ip)), double>::value), "");
 379     static_assert((std::is_same<decltype(std::frexp((long long)0, &ip)), double>::value), "");
 380     static_assert((std::is_same<decltype(std::frexp((unsigned long long)0, &ip)), double>::value), "");
 381     static_assert((std::is_same<decltype(std::frexp((double)0, &ip)), double>::value), "");
 382     static_assert((std::is_same<decltype(std::frexp((long double)0, &ip)), long double>::value), "");
 383     static_assert((std::is_same<decltype(std::frexpf(0, &ip)), float>::value), "");
 384     static_assert((std::is_same<decltype(std::frexpl(0, &ip)), long double>::value), "");
 385     static_assert((std::is_same<decltype(frexp(Ambiguous(), &ip)), Ambiguous>::value), "");
 386     assert(std::frexp(0, &ip) == 0);
 387 }
 388
 389 void test_ldexp()
 390 {
 391     int ip = 1;
 392     static_assert((std::is_same<decltype(std::ldexp((float)0, ip)), float>::value), "");
 393     static_assert((std::is_same<decltype(std::ldexp((bool)0, ip)), double>::value), "");
 394     static_assert((std::is_same<decltype(std::ldexp((unsigned short)0, ip)), double>::value), "");
 395     static_assert((std::is_same<decltype(std::ldexp((int)0, ip)), double>::value), "");
 396     static_assert((std::is_same<decltype(std::ldexp((unsigned int)0, ip)), double>::value), "");
 397     static_assert((std::is_same<decltype(std::ldexp((long)0, ip)), double>::value), "");
 398     static_assert((std::is_same<decltype(std::ldexp((unsigned long)0, ip)), double>::value), "");
 399     static_assert((std::is_same<decltype(std::ldexp((long long)0, ip)), double>::value), "");
 400     static_assert((std::is_same<decltype(std::ldexp((unsigned long long)0, ip)), double>::value), "");
 401     static_assert((std::is_same<decltype(std::ldexp((double)0, ip)), double>::value), "");
 402     static_assert((std::is_same<decltype(std::ldexp((long double)0, ip)), long double>::value), "");
 403     static_assert((std::is_same<decltype(std::ldexpf(0, ip)), float>::value), "");
 404     static_assert((std::is_same<decltype(std::ldexpl(0, ip)), long double>::value), "");
 405     static_assert((std::is_same<decltype(ldexp(Ambiguous(), ip)), Ambiguous>::value), "");
 406     assert(std::ldexp(1, ip) == 2);
 407 }
 408
 409 void test_log()
 410 {
 411     static_assert((std::is_same<decltype(std::log((float)0)), float>::value), "");
 412     static_assert((std::is_same<decltype(std::log((bool)0)), double>::value), "");
 413     static_assert((std::is_same<decltype(std::log((unsigned short)0)), double>::value), "");
 414     static_assert((std::is_same<decltype(std::log((int)0)), double>::value), "");
 415     static_assert((std::is_same<decltype(std::log((unsigned int)0)), double>::value), "");
 416     static_assert((std::is_same<decltype(std::log((long)0)), double>::value), "");
 417     static_assert((std::is_same<decltype(std::log((unsigned long)0)), double>::value), "");
 418     static_assert((std::is_same<decltype(std::log((long long)0)), double>::value), "");
 419     static_assert((std::is_same<decltype(std::log((unsigned long long)0)), double>::value), "");
 420     static_assert((std::is_same<decltype(std::log((double)0)), double>::value), "");
 421     static_assert((std::is_same<decltype(std::log((long double)0)), long double>::value), "");
 422     static_assert((std::is_same<decltype(std::logf(0)), float>::value), "");
 423     static_assert((std::is_same<decltype(std::logl(0)), long double>::value), "");
 424     static_assert((std::is_same<decltype(log(Ambiguous())), Ambiguous>::value), "");
 425     assert(std::log(1) == 0);
 426 }
 427
 428 void test_log10()
 429 {
 430     static_assert((std::is_same<decltype(std::log10((float)0)), float>::value), "");
 431     static_assert((std::is_same<decltype(std::log10((bool)0)), double>::value), "");
 432     static_assert((std::is_same<decltype(std::log10((unsigned short)0)), double>::value), "");
 433     static_assert((std::is_same<decltype(std::log10((int)0)), double>::value), "");
 434     static_assert((std::is_same<decltype(std::log10((unsigned int)0)), double>::value), "");
 435     static_assert((std::is_same<decltype(std::log10((long)0)), double>::value), "");
 436     static_assert((std::is_same<decltype(std::log10((unsigned long)0)), double>::value), "");
 437     static_assert((std::is_same<decltype(std::log10((long long)0)), double>::value), "");
 438     static_assert((std::is_same<decltype(std::log10((unsigned long long)0)), double>::value), "");
 439     static_assert((std::is_same<decltype(std::log10((double)0)), double>::value), "");
 440     static_assert((std::is_same<decltype(std::log10((long double)0)), long double>::value), "");
 441     static_assert((std::is_same<decltype(std::log10f(0)), float>::value), "");
 442     static_assert((std::is_same<decltype(std::log10l(0)), long double>::value), "");
 443     static_assert((std::is_same<decltype(log10(Ambiguous())), Ambiguous>::value), "");
 444     assert(std::log10(1) == 0);
 445 }
 446
 447 void test_modf()
 448 {
 449     static_assert((std::is_same<decltype(std::modf((float)0, (float*)0)), float>::value), "");
 450     static_assert((std::is_same<decltype(std::modf((double)0, (double*)0)), double>::value), "");
 451     static_assert((std::is_same<decltype(std::modf((long double)0, (long double*)0)), long double>::value), "");
 452     static_assert((std::is_same<decltype(std::modff(0, (float*)0)), float>::value), "");
 453     static_assert((std::is_same<decltype(std::modfl(0, (long double*)0)), long double>::value), "");
 454     static_assert((std::is_same<decltype(modf(Ambiguous(), (Ambiguous*)0)), Ambiguous>::value), "");
 455     double i;
 456     assert(std::modf(1., &i) == 0);
 457 }
 458
 459 void test_pow()
 460 {
 461     static_assert((std::is_same<decltype(std::pow((float)0, (float)0)), float>::value), "");
 462     static_assert((std::is_same<decltype(std::pow((bool)0, (float)0)), double>::value), "");
 463     static_assert((std::is_same<decltype(std::pow((unsigned short)0, (double)0)), double>::value), "");
 464     static_assert((std::is_same<decltype(std::pow((int)0, (long double)0)), long double>::value), "");
 465     static_assert((std::is_same<decltype(std::pow((float)0, (unsigned int)0)), double>::value), "");
 466     static_assert((std::is_same<decltype(std::pow((double)0, (long)0)), double>::value), "");
 467     static_assert((std::is_same<decltype(std::pow((long double)0, (unsigned long)0)), long double>::value), "");
 468     static_assert((std::is_same<decltype(std::pow((int)0, (long long)0)), double>::value), "");
 469     static_assert((std::is_same<decltype(std::pow((int)0, (unsigned long long)0)), double>::value), "");
 470     static_assert((std::is_same<decltype(std::pow((double)0, (double)0)), double>::value), "");
 471     static_assert((std::is_same<decltype(std::pow((long double)0, (long double)0)), long double>::value), "");
 472     static_assert((std::is_same<decltype(std::pow((float)0, (double)0)), double>::value), "");
 473     static_assert((std::is_same<decltype(std::pow((float)0, (long double)0)), long double>::value), "");
 474     static_assert((std::is_same<decltype(std::pow((double)0, (long double)0)), long double>::value), "");
 475     static_assert((std::is_same<decltype(std::powf(0,0)), float>::value), "");
 476     static_assert((std::is_same<decltype(std::powl(0,0)), long double>::value), "");
 477     static_assert((std::is_same<decltype(std::pow((int)0, (int)0)), double>::value), "");
 478 //     static_assert((std::is_same<decltype(std::pow(Value<int>(), (int)0)), double>::value), "");
 479 //     static_assert((std::is_same<decltype(std::pow(Value<long double>(), (float)0)), long double>::value), "");
 480 //     static_assert((std::is_same<decltype(std::pow((float) 0, Value<float>())), float>::value), "");
 481     static_assert((std::is_same<decltype(pow(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 482     assert(std::pow(1,1) == 1);
 483 //     assert(std::pow(Value<int,1>(), Value<float,1>())  == 1);
 484 //     assert(std::pow(1.0f, Value<double,1>()) == 1);
 485 //     assert(std::pow(1.0, Value<int,1>()) == 1);
 486 //     assert(std::pow(Value<long double,1>(), 1LL) == 1);
 487 }
 488
 489 void test_sin()
 490 {
 491     static_assert((std::is_same<decltype(std::sin((float)0)), float>::value), "");
 492     static_assert((std::is_same<decltype(std::sin((bool)0)), double>::value), "");
 493     static_assert((std::is_same<decltype(std::sin((unsigned short)0)), double>::value), "");
 494     static_assert((std::is_same<decltype(std::sin((int)0)), double>::value), "");
 495     static_assert((std::is_same<decltype(std::sin((unsigned int)0)), double>::value), "");
 496     static_assert((std::is_same<decltype(std::sin((long)0)), double>::value), "");
 497     static_assert((std::is_same<decltype(std::sin((unsigned long)0)), double>::value), "");
 498     static_assert((std::is_same<decltype(std::sin((long long)0)), double>::value), "");
 499     static_assert((std::is_same<decltype(std::sin((unsigned long long)0)), double>::value), "");
 500     static_assert((std::is_same<decltype(std::sin((double)0)), double>::value), "");
 501     static_assert((std::is_same<decltype(std::sin((long double)0)), long double>::value), "");
 502     static_assert((std::is_same<decltype(std::sinf(0)), float>::value), "");
 503     static_assert((std::is_same<decltype(std::sinl(0)), long double>::value), "");
 504     static_assert((std::is_same<decltype(sin(Ambiguous())), Ambiguous>::value), "");
 505     assert(std::sin(0) == 0);
 506 }
 507
 508 void test_sinh()
 509 {
 510     static_assert((std::is_same<decltype(std::sinh((float)0)), float>::value), "");
 511     static_assert((std::is_same<decltype(std::sinh((bool)0)), double>::value), "");
 512     static_assert((std::is_same<decltype(std::sinh((unsigned short)0)), double>::value), "");
 513     static_assert((std::is_same<decltype(std::sinh((int)0)), double>::value), "");
 514     static_assert((std::is_same<decltype(std::sinh((unsigned int)0)), double>::value), "");
 515     static_assert((std::is_same<decltype(std::sinh((long)0)), double>::value), "");
 516     static_assert((std::is_same<decltype(std::sinh((unsigned long)0)), double>::value), "");
 517     static_assert((std::is_same<decltype(std::sinh((long long)0)), double>::value), "");
 518     static_assert((std::is_same<decltype(std::sinh((unsigned long long)0)), double>::value), "");
 519     static_assert((std::is_same<decltype(std::sinh((double)0)), double>::value), "");
 520     static_assert((std::is_same<decltype(std::sinh((long double)0)), long double>::value), "");
 521     static_assert((std::is_same<decltype(std::sinhf(0)), float>::value), "");
 522     static_assert((std::is_same<decltype(std::sinhl(0)), long double>::value), "");
 523     static_assert((std::is_same<decltype(sinh(Ambiguous())), Ambiguous>::value), "");
 524     assert(std::sinh(0) == 0);
 525 }
 526
 527 void test_sqrt()
 528 {
 529     static_assert((std::is_same<decltype(std::sqrt((float)0)), float>::value), "");
 530     static_assert((std::is_same<decltype(std::sqrt((bool)0)), double>::value), "");
 531     static_assert((std::is_same<decltype(std::sqrt((unsigned short)0)), double>::value), "");
 532     static_assert((std::is_same<decltype(std::sqrt((int)0)), double>::value), "");
 533     static_assert((std::is_same<decltype(std::sqrt((unsigned int)0)), double>::value), "");
 534     static_assert((std::is_same<decltype(std::sqrt((long)0)), double>::value), "");
 535     static_assert((std::is_same<decltype(std::sqrt((unsigned long)0)), double>::value), "");
 536     static_assert((std::is_same<decltype(std::sqrt((long long)0)), double>::value), "");
 537     static_assert((std::is_same<decltype(std::sqrt((unsigned long long)0)), double>::value), "");
 538     static_assert((std::is_same<decltype(std::sqrt((double)0)), double>::value), "");
 539     static_assert((std::is_same<decltype(std::sqrt((long double)0)), long double>::value), "");
 540     static_assert((std::is_same<decltype(std::sqrtf(0)), float>::value), "");
 541     static_assert((std::is_same<decltype(std::sqrtl(0)), long double>::value), "");
 542     static_assert((std::is_same<decltype(sqrt(Ambiguous())), Ambiguous>::value), "");
 543     assert(std::sqrt(4) == 2);
 544 }
 545
 546 void test_tan()
 547 {
 548     static_assert((std::is_same<decltype(std::tan((float)0)), float>::value), "");
 549     static_assert((std::is_same<decltype(std::tan((bool)0)), double>::value), "");
 550     static_assert((std::is_same<decltype(std::tan((unsigned short)0)), double>::value), "");
 551     static_assert((std::is_same<decltype(std::tan((int)0)), double>::value), "");
 552     static_assert((std::is_same<decltype(std::tan((unsigned int)0)), double>::value), "");
 553     static_assert((std::is_same<decltype(std::tan((long)0)), double>::value), "");
 554     static_assert((std::is_same<decltype(std::tan((unsigned long)0)), double>::value), "");
 555     static_assert((std::is_same<decltype(std::tan((long long)0)), double>::value), "");
 556     static_assert((std::is_same<decltype(std::tan((unsigned long long)0)), double>::value), "");
 557     static_assert((std::is_same<decltype(std::tan((double)0)), double>::value), "");
 558     static_assert((std::is_same<decltype(std::tan((long double)0)), long double>::value), "");
 559     static_assert((std::is_same<decltype(std::tanf(0)), float>::value), "");
 560     static_assert((std::is_same<decltype(std::tanl(0)), long double>::value), "");
 561     static_assert((std::is_same<decltype(tan(Ambiguous())), Ambiguous>::value), "");
 562     assert(std::tan(0) == 0);
 563 }
 564
 565 void test_tanh()
 566 {
 567     static_assert((std::is_same<decltype(std::tanh((float)0)), float>::value), "");
 568     static_assert((std::is_same<decltype(std::tanh((bool)0)), double>::value), "");
 569     static_assert((std::is_same<decltype(std::tanh((unsigned short)0)), double>::value), "");
 570     static_assert((std::is_same<decltype(std::tanh((int)0)), double>::value), "");
 571     static_assert((std::is_same<decltype(std::tanh((unsigned int)0)), double>::value), "");
 572     static_assert((std::is_same<decltype(std::tanh((long)0)), double>::value), "");
 573     static_assert((std::is_same<decltype(std::tanh((unsigned long)0)), double>::value), "");
 574     static_assert((std::is_same<decltype(std::tanh((long long)0)), double>::value), "");
 575     static_assert((std::is_same<decltype(std::tanh((unsigned long long)0)), double>::value), "");
 576     static_assert((std::is_same<decltype(std::tanh((double)0)), double>::value), "");
 577     static_assert((std::is_same<decltype(std::tanh((long double)0)), long double>::value), "");
 578     static_assert((std::is_same<decltype(std::tanhf(0)), float>::value), "");
 579     static_assert((std::is_same<decltype(std::tanhl(0)), long double>::value), "");
 580     static_assert((std::is_same<decltype(tanh(Ambiguous())), Ambiguous>::value), "");
 581     assert(std::tanh(0) == 0);
 582 }
 583
 584 void test_signbit()
 585 {
 586 #ifdef signbit
 587 #error signbit defined
 588 #endif
 589     static_assert((std::is_same<decltype(std::signbit((float)0)), bool>::value), "");
 590     static_assert((std::is_same<decltype(std::signbit((double)0)), bool>::value), "");
 591     static_assert((std::is_same<decltype(std::signbit(0)), bool>::value), "");
 592     static_assert((std::is_same<decltype(std::signbit((long double)0)), bool>::value), "");
 593     static_assert((std::is_same<decltype(signbit(Ambiguous())), Ambiguous>::value), "");
 594     assert(std::signbit(-1.0) == true);
 595     assert(std::signbit(0u) == false);
 596     assert(std::signbit(std::numeric_limits<unsigned>::max()) == false);
 597     assert(std::signbit(0) == false);
 598     assert(std::signbit(1) == false);
 599     assert(std::signbit(-1) == true);
 600     assert(std::signbit(std::numeric_limits<int>::max()) == false);
 601     assert(std::signbit(std::numeric_limits<int>::min()) == true);
 602 }
 603
 604 void test_fpclassify()
 605 {
 606 #ifdef fpclassify
 607 #error fpclassify defined
 608 #endif
 609     static_assert((std::is_same<decltype(std::fpclassify((float)0)), int>::value), "");
 610     static_assert((std::is_same<decltype(std::fpclassify((double)0)), int>::value), "");
 611     static_assert((std::is_same<decltype(std::fpclassify(0)), int>::value), "");
 612     static_assert((std::is_same<decltype(std::fpclassify((long double)0)), int>::value), "");
 613     static_assert((std::is_same<decltype(fpclassify(Ambiguous())), Ambiguous>::value), "");
 614     static_assert((std::is_same<decltype(fpclassify(Value<float>())), int>::value), "");
 615     static_assert((std::is_same<decltype(fpclassify(Value<double>())), int>::value), "");
 616     static_assert((std::is_same<decltype(fpclassify(Value<long double>())), int>::value), "");
 617     ASSERT_NOEXCEPT(std::fpclassify((float)0));
 618     ASSERT_NOEXCEPT(std::fpclassify((double)0));
 619     ASSERT_NOEXCEPT(std::fpclassify((long double)0));
 620     ASSERT_NOEXCEPT(std::fpclassify(0));
 621     assert(std::fpclassify(-1.0) == FP_NORMAL);
 622     assert(std::fpclassify(0) == FP_ZERO);
 623     assert(std::fpclassify(1) == FP_NORMAL);
 624     assert(std::fpclassify(-1) == FP_NORMAL);
 625     assert(std::fpclassify(std::numeric_limits<int>::max()) == FP_NORMAL);
 626     assert(std::fpclassify(std::numeric_limits<int>::min()) == FP_NORMAL);
 627     assert(std::fpclassify(Value<double, 1>()) == FP_NORMAL);
 628 }
 629
 630 void test_isfinite()
 631 {
 632 #ifdef isfinite
 633 #error isfinite defined
 634 #endif
 635     static_assert((std::is_same<decltype(std::isfinite((float)0)), bool>::value), "");
 636     static_assert((std::is_same<decltype(std::isfinite((double)0)), bool>::value), "");
 637     static_assert((std::is_same<decltype(std::isfinite(0)), bool>::value), "");
 638     static_assert((std::is_same<decltype(std::isfinite((long double)0)), bool>::value), "");
 639     static_assert((std::is_same<decltype(isfinite(Ambiguous())), Ambiguous>::value), "");
 640     assert(std::isfinite(-1.0) == true);
 641     assert(std::isfinite(0) == true);
 642     assert(std::isfinite(1) == true);
 643     assert(std::isfinite(-1) == true);
 644     assert(std::isfinite(std::numeric_limits<int>::max()) == true);
 645     assert(std::isfinite(std::numeric_limits<int>::min()) == true);
 646 }
 647
 648 void test_isnormal()
 649 {
 650 #ifdef isnormal
 651 #error isnormal defined
 652 #endif
 653     static_assert((std::is_same<decltype(std::isnormal((float)0)), bool>::value), "");
 654     static_assert((std::is_same<decltype(std::isnormal((double)0)), bool>::value), "");
 655     static_assert((std::is_same<decltype(std::isnormal(0)), bool>::value), "");
 656     static_assert((std::is_same<decltype(std::isnormal((long double)0)), bool>::value), "");
 657     static_assert((std::is_same<decltype(isnormal(Ambiguous())), Ambiguous>::value), "");
 658     assert(std::isnormal(-1.0) == true);
 659     assert(std::isnormal(0) == false);
 660     assert(std::isnormal(1) == true);
 661     assert(std::isnormal(-1) == true);
 662     assert(std::isnormal(std::numeric_limits<int>::max()) == true);
 663     assert(std::isnormal(std::numeric_limits<int>::min()) == true);
 664 }
 665
 666 void test_isgreater()
 667 {
 668 #ifdef isgreater
 669 #error isgreater defined
 670 #endif
 671     static_assert((std::is_same<decltype(std::isgreater((float)0, (float)0)), bool>::value), "");
 672     static_assert((std::is_same<decltype(std::isgreater((float)0, (double)0)), bool>::value), "");
 673     static_assert((std::is_same<decltype(std::isgreater((float)0, (long double)0)), bool>::value), "");
 674     static_assert((std::is_same<decltype(std::isgreater((double)0, (float)0)), bool>::value), "");
 675     static_assert((std::is_same<decltype(std::isgreater((double)0, (double)0)), bool>::value), "");
 676     static_assert((std::is_same<decltype(std::isgreater(0, (double)0)), bool>::value), "");
 677     static_assert((std::is_same<decltype(std::isgreater((double)0, (long double)0)), bool>::value), "");
 678     static_assert((std::is_same<decltype(std::isgreater((long double)0, (float)0)), bool>::value), "");
 679     static_assert((std::is_same<decltype(std::isgreater((long double)0, (double)0)), bool>::value), "");
 680     static_assert((std::is_same<decltype(std::isgreater((long double)0, (long double)0)), bool>::value), "");
 681     static_assert((std::is_same<decltype(isgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 682     assert(std::isgreater(-1.0, 0.F) == false);
 683 }
 684
 685 void test_isgreaterequal()
 686 {
 687 #ifdef isgreaterequal
 688 #error isgreaterequal defined
 689 #endif
 690     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (float)0)), bool>::value), "");
 691     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (double)0)), bool>::value), "");
 692     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (long double)0)), bool>::value), "");
 693     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (float)0)), bool>::value), "");
 694     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (double)0)), bool>::value), "");
 695     static_assert((std::is_same<decltype(std::isgreaterequal(0, (double)0)), bool>::value), "");
 696     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (long double)0)), bool>::value), "");
 697     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (float)0)), bool>::value), "");
 698     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (double)0)), bool>::value), "");
 699     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (long double)0)), bool>::value), "");
 700     static_assert((std::is_same<decltype(isgreaterequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 701     assert(std::isgreaterequal(-1.0, 0.F) == false);
 702 }
 703
 704 void test_isinf()
 705 {
 706 #ifdef isinf
 707 #error isinf defined
 708 #endif
 709     static_assert((std::is_same<decltype(std::isinf((float)0)), bool>::value), "");
 710
 711     typedef decltype(std::isinf((double)0)) DoubleRetType;
 712 #if defined(__GLIBC__) && TEST_STD_VER == 03 && defined(TEST_COMPILER_CLANG)
 713     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
 714     // all C++ dialects. The test should tolerate this when libc++ can't work
 715     // around it via `_LIBCPP_PREFERRED_OVERLOAD`, which is only available
 716     // in modern versions of Clang, and not elsewhere.
 717     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
 718     static_assert((std::is_same<DoubleRetType, bool>::value
 719                 || std::is_same<DoubleRetType, int>::value), "");
 720 #else
 721     static_assert((std::is_same<DoubleRetType, bool>::value), "");
 722 #endif
 723
 724     static_assert((std::is_same<decltype(std::isinf(0)), bool>::value), "");
 725     static_assert((std::is_same<decltype(std::isinf((long double)0)), bool>::value), "");
 726     assert(std::isinf(-1.0) == false);
 727     assert(std::isinf(0) == false);
 728     assert(std::isinf(1) == false);
 729     assert(std::isinf(-1) == false);
 730     assert(std::isinf(std::numeric_limits<int>::max()) == false);
 731     assert(std::isinf(std::numeric_limits<int>::min()) == false);
 732 }
 733
 734 void test_isless()
 735 {
 736 #ifdef isless
 737 #error isless defined
 738 #endif
 739     static_assert((std::is_same<decltype(std::isless((float)0, (float)0)), bool>::value), "");
 740     static_assert((std::is_same<decltype(std::isless((float)0, (double)0)), bool>::value), "");
 741     static_assert((std::is_same<decltype(std::isless((float)0, (long double)0)), bool>::value), "");
 742     static_assert((std::is_same<decltype(std::isless((double)0, (float)0)), bool>::value), "");
 743     static_assert((std::is_same<decltype(std::isless((double)0, (double)0)), bool>::value), "");
 744     static_assert((std::is_same<decltype(std::isless(0, (double)0)), bool>::value), "");
 745     static_assert((std::is_same<decltype(std::isless((double)0, (long double)0)), bool>::value), "");
 746     static_assert((std::is_same<decltype(std::isless((long double)0, (float)0)), bool>::value), "");
 747     static_assert((std::is_same<decltype(std::isless((long double)0, (double)0)), bool>::value), "");
 748     static_assert((std::is_same<decltype(std::isless((long double)0, (long double)0)), bool>::value), "");
 749     static_assert((std::is_same<decltype(isless(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 750     assert(std::isless(-1.0, 0.F) == true);
 751 }
 752
 753 void test_islessequal()
 754 {
 755 #ifdef islessequal
 756 #error islessequal defined
 757 #endif
 758     static_assert((std::is_same<decltype(std::islessequal((float)0, (float)0)), bool>::value), "");
 759     static_assert((std::is_same<decltype(std::islessequal((float)0, (double)0)), bool>::value), "");
 760     static_assert((std::is_same<decltype(std::islessequal((float)0, (long double)0)), bool>::value), "");
 761     static_assert((std::is_same<decltype(std::islessequal((double)0, (float)0)), bool>::value), "");
 762     static_assert((std::is_same<decltype(std::islessequal((double)0, (double)0)), bool>::value), "");
 763     static_assert((std::is_same<decltype(std::islessequal(0, (double)0)), bool>::value), "");
 764     static_assert((std::is_same<decltype(std::islessequal((double)0, (long double)0)), bool>::value), "");
 765     static_assert((std::is_same<decltype(std::islessequal((long double)0, (float)0)), bool>::value), "");
 766     static_assert((std::is_same<decltype(std::islessequal((long double)0, (double)0)), bool>::value), "");
 767     static_assert((std::is_same<decltype(std::islessequal((long double)0, (long double)0)), bool>::value), "");
 768     static_assert((std::is_same<decltype(islessequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 769     assert(std::islessequal(-1.0, 0.F) == true);
 770 }
 771
 772 void test_islessgreater()
 773 {
 774 #ifdef islessgreater
 775 #error islessgreater defined
 776 #endif
 777     static_assert((std::is_same<decltype(std::islessgreater((float)0, (float)0)), bool>::value), "");
 778     static_assert((std::is_same<decltype(std::islessgreater((float)0, (double)0)), bool>::value), "");
 779     static_assert((std::is_same<decltype(std::islessgreater((float)0, (long double)0)), bool>::value), "");
 780     static_assert((std::is_same<decltype(std::islessgreater((double)0, (float)0)), bool>::value), "");
 781     static_assert((std::is_same<decltype(std::islessgreater((double)0, (double)0)), bool>::value), "");
 782     static_assert((std::is_same<decltype(std::islessgreater(0, (double)0)), bool>::value), "");
 783     static_assert((std::is_same<decltype(std::islessgreater((double)0, (long double)0)), bool>::value), "");
 784     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (float)0)), bool>::value), "");
 785     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (double)0)), bool>::value), "");
 786     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (long double)0)), bool>::value), "");
 787     static_assert((std::is_same<decltype(islessgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 788     assert(std::islessgreater(-1.0, 0.F) == true);
 789 }
 790
 791 void test_isnan()
 792 {
 793 #ifdef isnan
 794 #error isnan defined
 795 #endif
 796     static_assert((std::is_same<decltype(std::isnan((float)0)), bool>::value), "");
 797
 798     typedef decltype(std::isnan((double)0)) DoubleRetType;
 799 #if defined(__GLIBC__) && TEST_STD_VER == 03 && defined(TEST_COMPILER_CLANG)
 800     // GLIBC < 2.23 defines 'isnan(double)' with a return type of 'int' in
 801     // all C++ dialects. The test should tolerate this when libc++ can't work
 802     // around it via `_LIBCPP_PREFERRED_OVERLOAD`, which is only available
 803     // in modern versions of Clang, and not elsewhere.
 804     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
 805     static_assert((std::is_same<DoubleRetType, bool>::value
 806                 || std::is_same<DoubleRetType, int>::value), "");
 807 #else
 808     static_assert((std::is_same<DoubleRetType, bool>::value), "");
 809 #endif
 810
 811     static_assert((std::is_same<decltype(std::isnan(0)), bool>::value), "");
 812     static_assert((std::is_same<decltype(std::isnan((long double)0)), bool>::value), "");
 813     assert(std::isnan(-1.0) == false);
 814     assert(std::isnan(0) == false);
 815     assert(std::isnan(1) == false);
 816     assert(std::isnan(-1) == false);
 817     assert(std::isnan(std::numeric_limits<int>::max()) == false);
 818     assert(std::isnan(std::numeric_limits<int>::min()) == false);
 819 }
 820
 821 void test_isunordered()
 822 {
 823 #ifdef isunordered
 824 #error isunordered defined
 825 #endif
 826     static_assert((std::is_same<decltype(std::isunordered((float)0, (float)0)), bool>::value), "");
 827     static_assert((std::is_same<decltype(std::isunordered((float)0, (double)0)), bool>::value), "");
 828     static_assert((std::is_same<decltype(std::isunordered((float)0, (long double)0)), bool>::value), "");
 829     static_assert((std::is_same<decltype(std::isunordered((double)0, (float)0)), bool>::value), "");
 830     static_assert((std::is_same<decltype(std::isunordered((double)0, (double)0)), bool>::value), "");
 831     static_assert((std::is_same<decltype(std::isunordered(0, (double)0)), bool>::value), "");
 832     static_assert((std::is_same<decltype(std::isunordered((double)0, (long double)0)), bool>::value), "");
 833     static_assert((std::is_same<decltype(std::isunordered((long double)0, (float)0)), bool>::value), "");
 834     static_assert((std::is_same<decltype(std::isunordered((long double)0, (double)0)), bool>::value), "");
 835     static_assert((std::is_same<decltype(std::isunordered((long double)0, (long double)0)), bool>::value), "");
 836     static_assert((std::is_same<decltype(isunordered(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 837     assert(std::isunordered(-1.0, 0.F) == false);
 838 }
 839
 840 void test_acosh()
 841 {
 842     static_assert((std::is_same<decltype(std::acosh((float)0)), float>::value), "");
 843     static_assert((std::is_same<decltype(std::acosh((bool)0)), double>::value), "");
 844     static_assert((std::is_same<decltype(std::acosh((unsigned short)0)), double>::value), "");
 845     static_assert((std::is_same<decltype(std::acosh((int)0)), double>::value), "");
 846     static_assert((std::is_same<decltype(std::acosh((unsigned int)0)), double>::value), "");
 847     static_assert((std::is_same<decltype(std::acosh((long)0)), double>::value), "");
 848     static_assert((std::is_same<decltype(std::acosh((unsigned long)0)), double>::value), "");
 849     static_assert((std::is_same<decltype(std::acosh((long long)0)), double>::value), "");
 850     static_assert((std::is_same<decltype(std::acosh((unsigned long long)0)), double>::value), "");
 851     static_assert((std::is_same<decltype(std::acosh((double)0)), double>::value), "");
 852     static_assert((std::is_same<decltype(std::acosh((long double)0)), long double>::value), "");
 853     static_assert((std::is_same<decltype(std::acoshf(0)), float>::value), "");
 854     static_assert((std::is_same<decltype(std::acoshl(0)), long double>::value), "");
 855     static_assert((std::is_same<decltype(acosh(Ambiguous())), Ambiguous>::value), "");
 856     assert(std::acosh(1) == 0);
 857 }
 858
 859 void test_asinh()
 860 {
 861     static_assert((std::is_same<decltype(std::asinh((float)0)), float>::value), "");
 862     static_assert((std::is_same<decltype(std::asinh((bool)0)), double>::value), "");
 863     static_assert((std::is_same<decltype(std::asinh((unsigned short)0)), double>::value), "");
 864     static_assert((std::is_same<decltype(std::asinh((int)0)), double>::value), "");
 865     static_assert((std::is_same<decltype(std::asinh((unsigned int)0)), double>::value), "");
 866     static_assert((std::is_same<decltype(std::asinh((long)0)), double>::value), "");
 867     static_assert((std::is_same<decltype(std::asinh((unsigned long)0)), double>::value), "");
 868     static_assert((std::is_same<decltype(std::asinh((long long)0)), double>::value), "");
 869     static_assert((std::is_same<decltype(std::asinh((unsigned long long)0)), double>::value), "");
 870     static_assert((std::is_same<decltype(std::asinh((double)0)), double>::value), "");
 871     static_assert((std::is_same<decltype(std::asinh((long double)0)), long double>::value), "");
 872     static_assert((std::is_same<decltype(std::asinhf(0)), float>::value), "");
 873     static_assert((std::is_same<decltype(std::asinhl(0)), long double>::value), "");
 874     static_assert((std::is_same<decltype(asinh(Ambiguous())), Ambiguous>::value), "");
 875     assert(std::asinh(0) == 0);
 876 }
 877
 878 void test_atanh()
 879 {
 880     static_assert((std::is_same<decltype(std::atanh((float)0)), float>::value), "");
 881     static_assert((std::is_same<decltype(std::atanh((bool)0)), double>::value), "");
 882     static_assert((std::is_same<decltype(std::atanh((unsigned short)0)), double>::value), "");
 883     static_assert((std::is_same<decltype(std::atanh((int)0)), double>::value), "");
 884     static_assert((std::is_same<decltype(std::atanh((unsigned int)0)), double>::value), "");
 885     static_assert((std::is_same<decltype(std::atanh((long)0)), double>::value), "");
 886     static_assert((std::is_same<decltype(std::atanh((unsigned long)0)), double>::value), "");
 887     static_assert((std::is_same<decltype(std::atanh((long long)0)), double>::value), "");
 888     static_assert((std::is_same<decltype(std::atanh((unsigned long long)0)), double>::value), "");
 889     static_assert((std::is_same<decltype(std::atanh((double)0)), double>::value), "");
 890     static_assert((std::is_same<decltype(std::atanh((long double)0)), long double>::value), "");
 891     static_assert((std::is_same<decltype(std::atanhf(0)), float>::value), "");
 892     static_assert((std::is_same<decltype(std::atanhl(0)), long double>::value), "");
 893     static_assert((std::is_same<decltype(atanh(Ambiguous())), Ambiguous>::value), "");
 894     assert(std::atanh(0) == 0);
 895 }
 896
 897 void test_cbrt()
 898 {
 899     static_assert((std::is_same<decltype(std::cbrt((float)0)), float>::value), "");
 900     static_assert((std::is_same<decltype(std::cbrt((bool)0)), double>::value), "");
 901     static_assert((std::is_same<decltype(std::cbrt((unsigned short)0)), double>::value), "");
 902     static_assert((std::is_same<decltype(std::cbrt((int)0)), double>::value), "");
 903     static_assert((std::is_same<decltype(std::cbrt((unsigned int)0)), double>::value), "");
 904     static_assert((std::is_same<decltype(std::cbrt((long)0)), double>::value), "");
 905     static_assert((std::is_same<decltype(std::cbrt((unsigned long)0)), double>::value), "");
 906     static_assert((std::is_same<decltype(std::cbrt((long long)0)), double>::value), "");
 907     static_assert((std::is_same<decltype(std::cbrt((unsigned long long)0)), double>::value), "");
 908     static_assert((std::is_same<decltype(std::cbrt((double)0)), double>::value), "");
 909     static_assert((std::is_same<decltype(std::cbrt((long double)0)), long double>::value), "");
 910     static_assert((std::is_same<decltype(std::cbrtf(0)), float>::value), "");
 911     static_assert((std::is_same<decltype(std::cbrtl(0)), long double>::value), "");
 912     static_assert((std::is_same<decltype(cbrt(Ambiguous())), Ambiguous>::value), "");
 913     assert(truncate_fp(std::cbrt(1)) == 1);
 914 }
 915
 916 void test_copysign()
 917 {
 918     static_assert((std::is_same<decltype(std::copysign((float)0, (float)0)), float>::value), "");
 919     static_assert((std::is_same<decltype(std::copysign((bool)0, (float)0)), double>::value), "");
 920     static_assert((std::is_same<decltype(std::copysign((unsigned short)0, (double)0)), double>::value), "");
 921     static_assert((std::is_same<decltype(std::copysign((int)0, (long double)0)), long double>::value), "");
 922     static_assert((std::is_same<decltype(std::copysign((float)0, (unsigned int)0)), double>::value), "");
 923     static_assert((std::is_same<decltype(std::copysign((double)0, (long)0)), double>::value), "");
 924     static_assert((std::is_same<decltype(std::copysign((long double)0, (unsigned long)0)), long double>::value), "");
 925     static_assert((std::is_same<decltype(std::copysign((int)0, (long long)0)), double>::value), "");
 926     static_assert((std::is_same<decltype(std::copysign((int)0, (unsigned long long)0)), double>::value), "");
 927     static_assert((std::is_same<decltype(std::copysign((double)0, (double)0)), double>::value), "");
 928     static_assert((std::is_same<decltype(std::copysign((long double)0, (long double)0)), long double>::value), "");
 929     static_assert((std::is_same<decltype(std::copysign((float)0, (double)0)), double>::value), "");
 930     static_assert((std::is_same<decltype(std::copysign((float)0, (long double)0)), long double>::value), "");
 931     static_assert((std::is_same<decltype(std::copysign((double)0, (long double)0)), long double>::value), "");
 932     static_assert((std::is_same<decltype(std::copysignf(0,0)), float>::value), "");
 933     static_assert((std::is_same<decltype(std::copysignl(0,0)), long double>::value), "");
 934     static_assert((std::is_same<decltype(std::copysign((int)0, (int)0)), double>::value), "");
 935     static_assert((std::is_same<decltype(copysign(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
 936     assert(std::copysign(1,1) == 1);
 937 }
 938
 939 void test_erf()
 940 {
 941     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");
 942     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");
 943     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");
 944     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");
 945     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");
 946     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");
 947     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");
 948     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");
 949     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");
 950     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");
 951     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");
 952     static_assert((std::is_same<decltype(std::erff(0)), float>::value), "");
 953     static_assert((std::is_same<decltype(std::erfl(0)), long double>::value), "");
 954     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");
 955     assert(std::erf(0) == 0);
 956 }
 957
 958 void test_erfc()
 959 {
 960     static_assert((std::is_same<decltype(std::erfc((float)0)), float>::value), "");
 961     static_assert((std::is_same<decltype(std::erfc((bool)0)), double>::value), "");
 962     static_assert((std::is_same<decltype(std::erfc((unsigned short)0)), double>::value), "");
 963     static_assert((std::is_same<decltype(std::erfc((int)0)), double>::value), "");
 964     static_assert((std::is_same<decltype(std::erfc((unsigned int)0)), double>::value), "");
 965     static_assert((std::is_same<decltype(std::erfc((long)0)), double>::value), "");
 966     static_assert((std::is_same<decltype(std::erfc((unsigned long)0)), double>::value), "");
 967     static_assert((std::is_same<decltype(std::erfc((long long)0)), double>::value), "");
 968     static_assert((std::is_same<decltype(std::erfc((unsigned long long)0)), double>::value), "");
 969     static_assert((std::is_same<decltype(std::erfc((double)0)), double>::value), "");
 970     static_assert((std::is_same<decltype(std::erfc((long double)0)), long double>::value), "");
 971     static_assert((std::is_same<decltype(std::erfcf(0)), float>::value), "");
 972     static_assert((std::is_same<decltype(std::erfcl(0)), long double>::value), "");
 973     static_assert((std::is_same<decltype(erfc(Ambiguous())), Ambiguous>::value), "");
 974     assert(std::erfc(0) == 1);
 975 }
 976
 977 void test_exp2()
 978 {
 979     static_assert((std::is_same<decltype(std::exp2((float)0)), float>::value), "");
 980     static_assert((std::is_same<decltype(std::exp2((bool)0)), double>::value), "");
 981     static_assert((std::is_same<decltype(std::exp2((unsigned short)0)), double>::value), "");
 982     static_assert((std::is_same<decltype(std::exp2((int)0)), double>::value), "");
 983     static_assert((std::is_same<decltype(std::exp2((unsigned int)0)), double>::value), "");
 984     static_assert((std::is_same<decltype(std::exp2((long)0)), double>::value), "");
 985     static_assert((std::is_same<decltype(std::exp2((unsigned long)0)), double>::value), "");
 986     static_assert((std::is_same<decltype(std::exp2((long long)0)), double>::value), "");
 987     static_assert((std::is_same<decltype(std::exp2((unsigned long long)0)), double>::value), "");
 988     static_assert((std::is_same<decltype(std::exp2((double)0)), double>::value), "");
 989     static_assert((std::is_same<decltype(std::exp2((long double)0)), long double>::value), "");
 990     static_assert((std::is_same<decltype(std::exp2f(0)), float>::value), "");
 991     static_assert((std::is_same<decltype(std::exp2l(0)), long double>::value), "");
 992     static_assert((std::is_same<decltype(exp2(Ambiguous())), Ambiguous>::value), "");
 993     assert(std::exp2(1) == 2);
 994 }
 995
 996 void test_expm1()
 997 {
 998     static_assert((std::is_same<decltype(std::expm1((float)0)), float>::value), "");
 999     static_assert((std::is_same<decltype(std::expm1((bool)0)), double>::value), "");
1000     static_assert((std::is_same<decltype(std::expm1((unsigned short)0)), double>::value), "");
1001     static_assert((std::is_same<decltype(std::expm1((int)0)), double>::value), "");
1002     static_assert((std::is_same<decltype(std::expm1((unsigned int)0)), double>::value), "");
1003     static_assert((std::is_same<decltype(std::expm1((long)0)), double>::value), "");
1004     static_assert((std::is_same<decltype(std::expm1((unsigned long)0)), double>::value), "");
1005     static_assert((std::is_same<decltype(std::expm1((long long)0)), double>::value), "");
1006     static_assert((std::is_same<decltype(std::expm1((unsigned long long)0)), double>::value), "");
1007     static_assert((std::is_same<decltype(std::expm1((double)0)), double>::value), "");
1008     static_assert((std::is_same<decltype(std::expm1((long double)0)), long double>::value), "");
1009     static_assert((std::is_same<decltype(std::expm1f(0)), float>::value), "");
1010     static_assert((std::is_same<decltype(std::expm1l(0)), long double>::value), "");
1011     static_assert((std::is_same<decltype(expm1(Ambiguous())), Ambiguous>::value), "");
1012     assert(std::expm1(0) == 0);
1013 }
1014
1015 void test_fdim()
1016 {
1017     static_assert((std::is_same<decltype(std::fdim((float)0, (float)0)), float>::value), "");
1018     static_assert((std::is_same<decltype(std::fdim((bool)0, (float)0)), double>::value), "");
1019     static_assert((std::is_same<decltype(std::fdim((unsigned short)0, (double)0)), double>::value), "");
1020     static_assert((std::is_same<decltype(std::fdim((int)0, (long double)0)), long double>::value), "");
1021     static_assert((std::is_same<decltype(std::fdim((float)0, (unsigned int)0)), double>::value), "");
1022     static_assert((std::is_same<decltype(std::fdim((double)0, (long)0)), double>::value), "");
1023     static_assert((std::is_same<decltype(std::fdim((long double)0, (unsigned long)0)), long double>::value), "");
1024     static_assert((std::is_same<decltype(std::fdim((int)0, (long long)0)), double>::value), "");
1025     static_assert((std::is_same<decltype(std::fdim((int)0, (unsigned long long)0)), double>::value), "");
1026     static_assert((std::is_same<decltype(std::fdim((double)0, (double)0)), double>::value), "");
1027     static_assert((std::is_same<decltype(std::fdim((long double)0, (long double)0)), long double>::value), "");
1028     static_assert((std::is_same<decltype(std::fdim((float)0, (double)0)), double>::value), "");
1029     static_assert((std::is_same<decltype(std::fdim((float)0, (long double)0)), long double>::value), "");
1030     static_assert((std::is_same<decltype(std::fdim((double)0, (long double)0)), long double>::value), "");
1031     static_assert((std::is_same<decltype(std::fdimf(0,0)), float>::value), "");
1032     static_assert((std::is_same<decltype(std::fdiml(0,0)), long double>::value), "");
1033     static_assert((std::is_same<decltype(std::fdim((int)0, (int)0)), double>::value), "");
1034     static_assert((std::is_same<decltype(fdim(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1035     assert(std::fdim(1,0) == 1);
1036 }
1037
1038 void test_fma()
1039 {
1040     static_assert((std::is_same<decltype(std::fma((bool)0, (float)0, (float)0)), double>::value), "");
1041     static_assert((std::is_same<decltype(std::fma((char)0, (float)0, (float)0)), double>::value), "");
1042     static_assert((std::is_same<decltype(std::fma((unsigned)0, (float)0, (float)0)), double>::value), "");
1043     static_assert((std::is_same<decltype(std::fma((float)0, (int)0, (float)0)), double>::value), "");
1044     static_assert((std::is_same<decltype(std::fma((float)0, (long)0, (float)0)), double>::value), "");
1045     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (unsigned long long)0)), double>::value), "");
1046     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (double)0)), double>::value), "");
1047     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (long double)0)), long double>::value), "");
1048     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (float)0)), float>::value), "");
1049
1050     static_assert((std::is_same<decltype(std::fma((bool)0, (double)0, (double)0)), double>::value), "");
1051     static_assert((std::is_same<decltype(std::fma((char)0, (double)0, (double)0)), double>::value), "");
1052     static_assert((std::is_same<decltype(std::fma((unsigned)0, (double)0, (double)0)), double>::value), "");
1053     static_assert((std::is_same<decltype(std::fma((double)0, (int)0, (double)0)), double>::value), "");
1054     static_assert((std::is_same<decltype(std::fma((double)0, (long)0, (double)0)), double>::value), "");
1055     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (unsigned long long)0)), double>::value), "");
1056     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (float)0)), double>::value), "");
1057     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (long double)0)), long double>::value), "");
1058     static_assert((std::is_same<decltype(std::fma((double)0, (double)0,  (double)0)), double>::value), "");
1059
1060     static_assert((std::is_same<decltype(std::fma((bool)0, (long double)0, (long double)0)), long double>::value), "");
1061     static_assert((std::is_same<decltype(std::fma((char)0, (long double)0, (long double)0)), long double>::value), "");
1062     static_assert((std::is_same<decltype(std::fma((unsigned)0, (long double)0, (long double)0)), long double>::value), "");
1063     static_assert((std::is_same<decltype(std::fma((long double)0, (int)0, (long double)0)), long double>::value), "");
1064     static_assert((std::is_same<decltype(std::fma((long double)0, (long)0, (long double)0)), long double>::value), "");
1065     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (unsigned long long)0)), long double>::value), "");
1066     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (float)0)), long double>::value), "");
1067     static_assert((std::is_same<decltype(std::fma((double)0, (long double)0, (long double)0)), long double>::value), "");
1068     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (long double)0)), long double>::value), "");
1069
1070     static_assert((std::is_same<decltype(std::fmaf(0,0,0)), float>::value), "");
1071     static_assert((std::is_same<decltype(std::fmal(0,0,0)), long double>::value), "");
1072     static_assert((std::is_same<decltype(fma(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1073     assert(std::fma(1,1,1) == 2);
1074 }
1075
1076 void test_fmax()
1077 {
1078     static_assert((std::is_same<decltype(std::fmax((float)0, (float)0)), float>::value), "");
1079     static_assert((std::is_same<decltype(std::fmax((bool)0, (float)0)), double>::value), "");
1080     static_assert((std::is_same<decltype(std::fmax((unsigned short)0, (double)0)), double>::value), "");
1081     static_assert((std::is_same<decltype(std::fmax((int)0, (long double)0)), long double>::value), "");
1082     static_assert((std::is_same<decltype(std::fmax((float)0, (unsigned int)0)), double>::value), "");
1083     static_assert((std::is_same<decltype(std::fmax((double)0, (long)0)), double>::value), "");
1084     static_assert((std::is_same<decltype(std::fmax((long double)0, (unsigned long)0)), long double>::value), "");
1085     static_assert((std::is_same<decltype(std::fmax((int)0, (long long)0)), double>::value), "");
1086     static_assert((std::is_same<decltype(std::fmax((int)0, (unsigned long long)0)), double>::value), "");
1087     static_assert((std::is_same<decltype(std::fmax((double)0, (double)0)), double>::value), "");
1088     static_assert((std::is_same<decltype(std::fmax((long double)0, (long double)0)), long double>::value), "");
1089     static_assert((std::is_same<decltype(std::fmax((float)0, (double)0)), double>::value), "");
1090     static_assert((std::is_same<decltype(std::fmax((float)0, (long double)0)), long double>::value), "");
1091     static_assert((std::is_same<decltype(std::fmax((double)0, (long double)0)), long double>::value), "");
1092     static_assert((std::is_same<decltype(std::fmaxf(0,0)), float>::value), "");
1093     static_assert((std::is_same<decltype(std::fmaxl(0,0)), long double>::value), "");
1094     static_assert((std::is_same<decltype(std::fmax((int)0, (int)0)), double>::value), "");
1095     static_assert((std::is_same<decltype(fmax(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1096     assert(std::fmax(1,0) == 1);
1097 }
1098
1099 void test_fmin()
1100 {
1101     static_assert((std::is_same<decltype(std::fmin((float)0, (float)0)), float>::value), "");
1102     static_assert((std::is_same<decltype(std::fmin((bool)0, (float)0)), double>::value), "");
1103     static_assert((std::is_same<decltype(std::fmin((unsigned short)0, (double)0)), double>::value), "");
1104     static_assert((std::is_same<decltype(std::fmin((int)0, (long double)0)), long double>::value), "");
1105     static_assert((std::is_same<decltype(std::fmin((float)0, (unsigned int)0)), double>::value), "");
1106     static_assert((std::is_same<decltype(std::fmin((double)0, (long)0)), double>::value), "");
1107     static_assert((std::is_same<decltype(std::fmin((long double)0, (unsigned long)0)), long double>::value), "");
1108     static_assert((std::is_same<decltype(std::fmin((int)0, (long long)0)), double>::value), "");
1109     static_assert((std::is_same<decltype(std::fmin((int)0, (unsigned long long)0)), double>::value), "");
1110     static_assert((std::is_same<decltype(std::fmin((double)0, (double)0)), double>::value), "");
1111     static_assert((std::is_same<decltype(std::fmin((long double)0, (long double)0)), long double>::value), "");
1112     static_assert((std::is_same<decltype(std::fmin((float)0, (double)0)), double>::value), "");
1113     static_assert((std::is_same<decltype(std::fmin((float)0, (long double)0)), long double>::value), "");
1114     static_assert((std::is_same<decltype(std::fmin((double)0, (long double)0)), long double>::value), "");
1115     static_assert((std::is_same<decltype(std::fminf(0,0)), float>::value), "");
1116     static_assert((std::is_same<decltype(std::fminl(0,0)), long double>::value), "");
1117     static_assert((std::is_same<decltype(std::fmin((int)0, (int)0)), double>::value), "");
1118     static_assert((std::is_same<decltype(fmin(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1119     assert(std::fmin(1,0) == 0);
1120 }
1121
1122 #if TEST_STD_VER >= 17
1123 struct TestHypot3 {
1124   template <class Real>
1125   void operator()() const {
1126     const auto check = [](Real elem, Real abs_tol) {
1127       assert(std::isfinite(std::hypot(elem, Real(0), Real(0))));
1128       assert(fptest_close(std::hypot(elem, Real(0), Real(0)), elem, abs_tol));
1129       assert(std::isfinite(std::hypot(elem, elem, Real(0))));
1130       assert(fptest_close(std::hypot(elem, elem, Real(0)), std::sqrt(Real(2)) * elem, abs_tol));
1131       assert(std::isfinite(std::hypot(elem, elem, elem)));
1132       assert(fptest_close(std::hypot(elem, elem, elem), std::sqrt(Real(3)) * elem, abs_tol));
1133     };
1134
1135     { // check for overflow
1136       const auto [elem, abs_tol] = []() -> std::array<Real, 2> {
1137         if constexpr (std::is_same_v<Real, float>)
1138           return {1e20f, 1e16f};
1139         else if constexpr (std::is_same_v<Real, double>)
1140           return {1e300, 1e287};
1141         else { // long double
1142 #  if __DBL_MAX_EXP__ == __LDBL_MAX_EXP__
1143           return {1e300l, 1e287l}; // 64-bit
1144 #  else
1145           return {1e4000l, 1e3985l}; // 80- or 128-bit
1146 #  endif
1147         }
1148       }();
1149       check(elem, abs_tol);
1150     }
1151
1152     { // check for underflow
1153       const auto [elem, abs_tol] = []() -> std::array<Real, 2> {
1154         if constexpr (std::is_same_v<Real, float>)
1155           return {1e-20f, 1e-24f};
1156         else if constexpr (std::is_same_v<Real, double>)
1157           return {1e-287, 1e-300};
1158         else { // long double
1159 #  if __DBL_MAX_EXP__ == __LDBL_MAX_EXP__
1160           return {1e-287l, 1e-300l}; // 64-bit
1161 #  else
1162           return {1e-3985l, 1e-4000l}; // 80- or 128-bit
1163 #  endif
1164         }
1165       }();
1166       check(elem, abs_tol);
1167     }
1168   }
1169 };
1170 #endif
1171
1172 void test_hypot()
1173 {
1174     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0)), float>::value), "");
1175     static_assert((std::is_same<decltype(std::hypot((bool)0, (float)0)), double>::value), "");
1176     static_assert((std::is_same<decltype(std::hypot((unsigned short)0, (double)0)), double>::value), "");
1177     static_assert((std::is_same<decltype(std::hypot((int)0, (long double)0)), long double>::value), "");
1178     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned int)0)), double>::value), "");
1179     static_assert((std::is_same<decltype(std::hypot((double)0, (long)0)), double>::value), "");
1180     static_assert((std::is_same<decltype(std::hypot((long double)0, (unsigned long)0)), long double>::value), "");
1181     static_assert((std::is_same<decltype(std::hypot((int)0, (long long)0)), double>::value), "");
1182     static_assert((std::is_same<decltype(std::hypot((int)0, (unsigned long long)0)), double>::value), "");
1183     static_assert((std::is_same<decltype(std::hypot((double)0, (double)0)), double>::value), "");
1184     static_assert((std::is_same<decltype(std::hypot((long double)0, (long double)0)), long double>::value), "");
1185     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0)), double>::value), "");
1186     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0)), long double>::value), "");
1187     static_assert((std::is_same<decltype(std::hypot((double)0, (long double)0)), long double>::value), "");
1188     static_assert((std::is_same<decltype(std::hypotf(0,0)), float>::value), "");
1189     static_assert((std::is_same<decltype(std::hypotl(0,0)), long double>::value), "");
1190     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0)), double>::value), "");
1191     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1192     assert(std::hypot(3,4) == 5);
1193
1194 #if TEST_STD_VER >= 17
1195     // clang-format off
1196     static_assert((std::is_same_v<decltype(std::hypot((float)0, (float)0,          (float)0)),              float>));
1197     static_assert((std::is_same_v<decltype(std::hypot((float)0, (bool)0,           (float)0)),              double>));
1198     static_assert((std::is_same_v<decltype(std::hypot((float)0, (unsigned short)0, (double)0)),             double>));
1199     static_assert((std::is_same_v<decltype(std::hypot((float)0, (int)0,            (long double)0)),        long double>));
1200     static_assert((std::is_same_v<decltype(std::hypot((float)0, (double)0,         (long)0)),               double>));
1201     static_assert((std::is_same_v<decltype(std::hypot((float)0, (long double)0,    (unsigned long)0)),      long double>));
1202     static_assert((std::is_same_v<decltype(std::hypot((float)0, (int)0,            (long long)0)),          double>));
1203     static_assert((std::is_same_v<decltype(std::hypot((float)0, (int)0,            (unsigned long long)0)), double>));
1204     static_assert((std::is_same_v<decltype(std::hypot((float)0, (double)0,         (double)0)),             double>));
1205     static_assert((std::is_same_v<decltype(std::hypot((float)0, (long double)0,    (long double)0)),        long double>));
1206     static_assert((std::is_same_v<decltype(std::hypot((float)0, (float)0,          (double)0)),             double>));
1207     static_assert((std::is_same_v<decltype(std::hypot((float)0, (float)0,          (long double)0)),        long double>));
1208     static_assert((std::is_same_v<decltype(std::hypot((float)0, (double)0,         (long double)0)),        long double>));
1209     static_assert((std::is_same_v<decltype(std::hypot((int)0,   (int)0,            (int)0)),                double>));
1210     static_assert((std::is_same_v<decltype(hypot(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>));
1211     // clang-format on
1212
1213     assert(std::hypot(2,3,6) == 7);
1214     assert(std::hypot(1,4,8) == 9);
1215
1216     // Check for undue over-/underflows of intermediate results.
1217     // See discussion at https://github.com/llvm/llvm-project/issues/92782.
1218     types::for_each(types::floating_point_types(), TestHypot3());
1219 #endif
1220 }
1221
1222 void test_ilogb()
1223 {
1224     static_assert((std::is_same<decltype(std::ilogb((float)0)), int>::value), "");
1225     static_assert((std::is_same<decltype(std::ilogb((bool)0)), int>::value), "");
1226     static_assert((std::is_same<decltype(std::ilogb((unsigned short)0)), int>::value), "");
1227     static_assert((std::is_same<decltype(std::ilogb((int)0)), int>::value), "");
1228     static_assert((std::is_same<decltype(std::ilogb((unsigned int)0)), int>::value), "");
1229     static_assert((std::is_same<decltype(std::ilogb((long)0)), int>::value), "");
1230     static_assert((std::is_same<decltype(std::ilogb((unsigned long)0)), int>::value), "");
1231     static_assert((std::is_same<decltype(std::ilogb((long long)0)), int>::value), "");
1232     static_assert((std::is_same<decltype(std::ilogb((unsigned long long)0)), int>::value), "");
1233     static_assert((std::is_same<decltype(std::ilogb((double)0)), int>::value), "");
1234     static_assert((std::is_same<decltype(std::ilogb((long double)0)), int>::value), "");
1235     static_assert((std::is_same<decltype(std::ilogbf(0)), int>::value), "");
1236     static_assert((std::is_same<decltype(std::ilogbl(0)), int>::value), "");
1237     static_assert((std::is_same<decltype(ilogb(Ambiguous())), Ambiguous>::value), "");
1238     assert(std::ilogb(1) == 0);
1239 }
1240
1241 void test_lerp()
1242 {
1243     // See also "lerp.pass.cpp"
1244
1245 #if TEST_STD_VER > 17
1246     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (float)0)), float>::value), "");
1247     static_assert((std::is_same<decltype(std::lerp((float)0, (bool)0, (float)0)), double>::value), "");
1248     static_assert((std::is_same<decltype(std::lerp((float)0, (unsigned short)0, (double)0)), double>::value), "");
1249     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long double)0)), long double>::value), "");
1250     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long)0)), double>::value), "");
1251     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1252     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long long)0)), double>::value), "");
1253     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1254     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (double)0)), double>::value), "");
1255     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (long double)0)), long double>::value), "");
1256     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (double)0)), double>::value), "");
1257     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (long double)0)), long double>::value), "");
1258     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long double)0)), long double>::value), "");
1259     static_assert((std::is_same<decltype(std::lerp((int)0, (int)0, (int)0)), double>::value), "");
1260     static_assert((std::is_same<decltype(lerp(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1261
1262     assert(std::lerp(2, 3, 1) == 3);
1263     assert(std::lerp(1, 3, 0.5) == 2);
1264     assert(std::lerp(0, 4.0, 0) == 0);
1265     static_assert(std::lerp(2, 3, 1) == 3);
1266     static_assert(std::lerp(1, 3, 0.5) == 2);
1267     static_assert(std::lerp(0, 4.0, 0) == 0);
1268 #endif
1269 }
1270
1271 void test_lgamma()
1272 {
1273     static_assert((std::is_same<decltype(std::lgamma((float)0)), float>::value), "");
1274     static_assert((std::is_same<decltype(std::lgamma((bool)0)), double>::value), "");
1275     static_assert((std::is_same<decltype(std::lgamma((unsigned short)0)), double>::value), "");
1276     static_assert((std::is_same<decltype(std::lgamma((int)0)), double>::value), "");
1277     static_assert((std::is_same<decltype(std::lgamma((unsigned int)0)), double>::value), "");
1278     static_assert((std::is_same<decltype(std::lgamma((long)0)), double>::value), "");
1279     static_assert((std::is_same<decltype(std::lgamma((unsigned long)0)), double>::value), "");
1280     static_assert((std::is_same<decltype(std::lgamma((long long)0)), double>::value), "");
1281     static_assert((std::is_same<decltype(std::lgamma((unsigned long long)0)), double>::value), "");
1282     static_assert((std::is_same<decltype(std::lgamma((double)0)), double>::value), "");
1283     static_assert((std::is_same<decltype(std::lgamma((long double)0)), long double>::value), "");
1284     static_assert((std::is_same<decltype(std::lgammaf(0)), float>::value), "");
1285     static_assert((std::is_same<decltype(std::lgammal(0)), long double>::value), "");
1286     static_assert((std::is_same<decltype(lgamma(Ambiguous())), Ambiguous>::value), "");
1287     assert(std::lgamma(1) == 0);
1288 }
1289
1290 void test_llrint()
1291 {
1292     static_assert((std::is_same<decltype(std::llrint((float)0)), long long>::value), "");
1293     static_assert((std::is_same<decltype(std::llrint((bool)0)), long long>::value), "");
1294     static_assert((std::is_same<decltype(std::llrint((unsigned short)0)), long long>::value), "");
1295     static_assert((std::is_same<decltype(std::llrint((int)0)), long long>::value), "");
1296     static_assert((std::is_same<decltype(std::llrint((unsigned int)0)), long long>::value), "");
1297     static_assert((std::is_same<decltype(std::llrint((long)0)), long long>::value), "");
1298     static_assert((std::is_same<decltype(std::llrint((unsigned long)0)), long long>::value), "");
1299     static_assert((std::is_same<decltype(std::llrint((long long)0)), long long>::value), "");
1300     static_assert((std::is_same<decltype(std::llrint((unsigned long long)0)), long long>::value), "");
1301     static_assert((std::is_same<decltype(std::llrint((double)0)), long long>::value), "");
1302     static_assert((std::is_same<decltype(std::llrint((long double)0)), long long>::value), "");
1303     static_assert((std::is_same<decltype(std::llrintf(0)), long long>::value), "");
1304     static_assert((std::is_same<decltype(std::llrintl(0)), long long>::value), "");
1305     static_assert((std::is_same<decltype(llrint(Ambiguous())), Ambiguous>::value), "");
1306     assert(std::llrint(1) == 1LL);
1307 }
1308
1309 void test_llround()
1310 {
1311     static_assert((std::is_same<decltype(std::llround((float)0)), long long>::value), "");
1312     static_assert((std::is_same<decltype(std::llround((bool)0)), long long>::value), "");
1313     static_assert((std::is_same<decltype(std::llround((unsigned short)0)), long long>::value), "");
1314     static_assert((std::is_same<decltype(std::llround((int)0)), long long>::value), "");
1315     static_assert((std::is_same<decltype(std::llround((unsigned int)0)), long long>::value), "");
1316     static_assert((std::is_same<decltype(std::llround((long)0)), long long>::value), "");
1317     static_assert((std::is_same<decltype(std::llround((unsigned long)0)), long long>::value), "");
1318     static_assert((std::is_same<decltype(std::llround((long long)0)), long long>::value), "");
1319     static_assert((std::is_same<decltype(std::llround((unsigned long long)0)), long long>::value), "");
1320     static_assert((std::is_same<decltype(std::llround((double)0)), long long>::value), "");
1321     static_assert((std::is_same<decltype(std::llround((long double)0)), long long>::value), "");
1322     static_assert((std::is_same<decltype(std::llroundf(0)), long long>::value), "");
1323     static_assert((std::is_same<decltype(std::llroundl(0)), long long>::value), "");
1324     static_assert((std::is_same<decltype(llround(Ambiguous())), Ambiguous>::value), "");
1325     assert(std::llround(1) == 1LL);
1326 }
1327
1328 void test_log1p()
1329 {
1330     static_assert((std::is_same<decltype(std::log1p((float)0)), float>::value), "");
1331     static_assert((std::is_same<decltype(std::log1p((bool)0)), double>::value), "");
1332     static_assert((std::is_same<decltype(std::log1p((unsigned short)0)), double>::value), "");
1333     static_assert((std::is_same<decltype(std::log1p((int)0)), double>::value), "");
1334     static_assert((std::is_same<decltype(std::log1p((unsigned int)0)), double>::value), "");
1335     static_assert((std::is_same<decltype(std::log1p((long)0)), double>::value), "");
1336     static_assert((std::is_same<decltype(std::log1p((unsigned long)0)), double>::value), "");
1337     static_assert((std::is_same<decltype(std::log1p((long long)0)), double>::value), "");
1338     static_assert((std::is_same<decltype(std::log1p((unsigned long long)0)), double>::value), "");
1339     static_assert((std::is_same<decltype(std::log1p((double)0)), double>::value), "");
1340     static_assert((std::is_same<decltype(std::log1p((long double)0)), long double>::value), "");
1341     static_assert((std::is_same<decltype(std::log1pf(0)), float>::value), "");
1342     static_assert((std::is_same<decltype(std::log1pl(0)), long double>::value), "");
1343     static_assert((std::is_same<decltype(log1p(Ambiguous())), Ambiguous>::value), "");
1344     assert(std::log1p(0) == 0);
1345 }
1346
1347 void test_log2()
1348 {
1349     static_assert((std::is_same<decltype(std::log2((float)0)), float>::value), "");
1350     static_assert((std::is_same<decltype(std::log2((bool)0)), double>::value), "");
1351     static_assert((std::is_same<decltype(std::log2((unsigned short)0)), double>::value), "");
1352     static_assert((std::is_same<decltype(std::log2((int)0)), double>::value), "");
1353     static_assert((std::is_same<decltype(std::log2((unsigned int)0)), double>::value), "");
1354     static_assert((std::is_same<decltype(std::log2((long)0)), double>::value), "");
1355     static_assert((std::is_same<decltype(std::log2((unsigned long)0)), double>::value), "");
1356     static_assert((std::is_same<decltype(std::log2((long long)0)), double>::value), "");
1357     static_assert((std::is_same<decltype(std::log2((unsigned long long)0)), double>::value), "");
1358     static_assert((std::is_same<decltype(std::log2((double)0)), double>::value), "");
1359     static_assert((std::is_same<decltype(std::log2((long double)0)), long double>::value), "");
1360     static_assert((std::is_same<decltype(std::log2f(0)), float>::value), "");
1361     static_assert((std::is_same<decltype(std::log2l(0)), long double>::value), "");
1362     static_assert((std::is_same<decltype(log2(Ambiguous())), Ambiguous>::value), "");
1363     assert(std::log2(1) == 0);
1364 }
1365
1366 void test_logb()
1367 {
1368     static_assert((std::is_same<decltype(std::logb((float)0)), float>::value), "");
1369     static_assert((std::is_same<decltype(std::logb((bool)0)), double>::value), "");
1370     static_assert((std::is_same<decltype(std::logb((unsigned short)0)), double>::value), "");
1371     static_assert((std::is_same<decltype(std::logb((int)0)), double>::value), "");
1372     static_assert((std::is_same<decltype(std::logb((unsigned int)0)), double>::value), "");
1373     static_assert((std::is_same<decltype(std::logb((long)0)), double>::value), "");
1374     static_assert((std::is_same<decltype(std::logb((unsigned long)0)), double>::value), "");
1375     static_assert((std::is_same<decltype(std::logb((long long)0)), double>::value), "");
1376     static_assert((std::is_same<decltype(std::logb((unsigned long long)0)), double>::value), "");
1377     static_assert((std::is_same<decltype(std::logb((double)0)), double>::value), "");
1378     static_assert((std::is_same<decltype(std::logb((long double)0)), long double>::value), "");
1379     static_assert((std::is_same<decltype(std::logbf(0)), float>::value), "");
1380     static_assert((std::is_same<decltype(std::logbl(0)), long double>::value), "");
1381     static_assert((std::is_same<decltype(logb(Ambiguous())), Ambiguous>::value), "");
1382     assert(std::logb(1) == 0);
1383 }
1384
1385 void test_lrint()
1386 {
1387     static_assert((std::is_same<decltype(std::lrint((float)0)), long>::value), "");
1388     static_assert((std::is_same<decltype(std::lrint((bool)0)), long>::value), "");
1389     static_assert((std::is_same<decltype(std::lrint((unsigned short)0)), long>::value), "");
1390     static_assert((std::is_same<decltype(std::lrint((int)0)), long>::value), "");
1391     static_assert((std::is_same<decltype(std::lrint((unsigned int)0)), long>::value), "");
1392     static_assert((std::is_same<decltype(std::lrint((long)0)), long>::value), "");
1393     static_assert((std::is_same<decltype(std::lrint((unsigned long)0)), long>::value), "");
1394     static_assert((std::is_same<decltype(std::lrint((long long)0)), long>::value), "");
1395     static_assert((std::is_same<decltype(std::lrint((unsigned long long)0)), long>::value), "");
1396     static_assert((std::is_same<decltype(std::lrint((double)0)), long>::value), "");
1397     static_assert((std::is_same<decltype(std::lrint((long double)0)), long>::value), "");
1398     static_assert((std::is_same<decltype(std::lrintf(0)), long>::value), "");
1399     static_assert((std::is_same<decltype(std::lrintl(0)), long>::value), "");
1400     static_assert((std::is_same<decltype(lrint(Ambiguous())), Ambiguous>::value), "");
1401     assert(std::lrint(1) == 1L);
1402 }
1403
1404 void test_lround()
1405 {
1406     static_assert((std::is_same<decltype(std::lround((float)0)), long>::value), "");
1407     static_assert((std::is_same<decltype(std::lround((bool)0)), long>::value), "");
1408     static_assert((std::is_same<decltype(std::lround((unsigned short)0)), long>::value), "");
1409     static_assert((std::is_same<decltype(std::lround((int)0)), long>::value), "");
1410     static_assert((std::is_same<decltype(std::lround((unsigned int)0)), long>::value), "");
1411     static_assert((std::is_same<decltype(std::lround((long)0)), long>::value), "");
1412     static_assert((std::is_same<decltype(std::lround((unsigned long)0)), long>::value), "");
1413     static_assert((std::is_same<decltype(std::lround((long long)0)), long>::value), "");
1414     static_assert((std::is_same<decltype(std::lround((unsigned long long)0)), long>::value), "");
1415     static_assert((std::is_same<decltype(std::lround((double)0)), long>::value), "");
1416     static_assert((std::is_same<decltype(std::lround((long double)0)), long>::value), "");
1417     static_assert((std::is_same<decltype(std::lroundf(0)), long>::value), "");
1418     static_assert((std::is_same<decltype(std::lroundl(0)), long>::value), "");
1419     static_assert((std::is_same<decltype(lround(Ambiguous())), Ambiguous>::value), "");
1420     assert(std::lround(1) == 1L);
1421 }
1422
1423 void test_nan()
1424 {
1425     static_assert((std::is_same<decltype(std::nan("")), double>::value), "");
1426     static_assert((std::is_same<decltype(std::nanf("")), float>::value), "");
1427     static_assert((std::is_same<decltype(std::nanl("")), long double>::value), "");
1428 }
1429
1430 void test_nearbyint()
1431 {
1432     static_assert((std::is_same<decltype(std::nearbyint((float)0)), float>::value), "");
1433     static_assert((std::is_same<decltype(std::nearbyint((bool)0)), double>::value), "");
1434     static_assert((std::is_same<decltype(std::nearbyint((unsigned short)0)), double>::value), "");
1435     static_assert((std::is_same<decltype(std::nearbyint((int)0)), double>::value), "");
1436     static_assert((std::is_same<decltype(std::nearbyint((unsigned int)0)), double>::value), "");
1437     static_assert((std::is_same<decltype(std::nearbyint((long)0)), double>::value), "");
1438     static_assert((std::is_same<decltype(std::nearbyint((unsigned long)0)), double>::value), "");
1439     static_assert((std::is_same<decltype(std::nearbyint((long long)0)), double>::value), "");
1440     static_assert((std::is_same<decltype(std::nearbyint((unsigned long long)0)), double>::value), "");
1441     static_assert((std::is_same<decltype(std::nearbyint((double)0)), double>::value), "");
1442     static_assert((std::is_same<decltype(std::nearbyint((long double)0)), long double>::value), "");
1443     static_assert((std::is_same<decltype(std::nearbyintf(0)), float>::value), "");
1444     static_assert((std::is_same<decltype(std::nearbyintl(0)), long double>::value), "");
1445     static_assert((std::is_same<decltype(nearbyint(Ambiguous())), Ambiguous>::value), "");
1446     assert(std::nearbyint(1) == 1);
1447 }
1448
1449 void test_nextafter()
1450 {
1451     static_assert((std::is_same<decltype(std::nextafter((float)0, (float)0)), float>::value), "");
1452     static_assert((std::is_same<decltype(std::nextafter((bool)0, (float)0)), double>::value), "");
1453     static_assert((std::is_same<decltype(std::nextafter((unsigned short)0, (double)0)), double>::value), "");
1454     static_assert((std::is_same<decltype(std::nextafter((int)0, (long double)0)), long double>::value), "");
1455     static_assert((std::is_same<decltype(std::nextafter((float)0, (unsigned int)0)), double>::value), "");
1456     static_assert((std::is_same<decltype(std::nextafter((double)0, (long)0)), double>::value), "");
1457     static_assert((std::is_same<decltype(std::nextafter((long double)0, (unsigned long)0)), long double>::value), "");
1458     static_assert((std::is_same<decltype(std::nextafter((int)0, (long long)0)), double>::value), "");
1459     static_assert((std::is_same<decltype(std::nextafter((int)0, (unsigned long long)0)), double>::value), "");
1460     static_assert((std::is_same<decltype(std::nextafter((double)0, (double)0)), double>::value), "");
1461     static_assert((std::is_same<decltype(std::nextafter((long double)0, (long double)0)), long double>::value), "");
1462     static_assert((std::is_same<decltype(std::nextafter((float)0, (double)0)), double>::value), "");
1463     static_assert((std::is_same<decltype(std::nextafter((float)0, (long double)0)), long double>::value), "");
1464     static_assert((std::is_same<decltype(std::nextafter((double)0, (long double)0)), long double>::value), "");
1465     static_assert((std::is_same<decltype(std::nextafterf(0,0)), float>::value), "");
1466     static_assert((std::is_same<decltype(std::nextafterl(0,0)), long double>::value), "");
1467     static_assert((std::is_same<decltype(std::nextafter((int)0, (int)0)), double>::value), "");
1468     static_assert((std::is_same<decltype(nextafter(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1469     assert(std::nextafter(0,1) == hexfloat<double>(0x1, 0, -1074));
1470 }
1471
1472 void test_nexttoward()
1473 {
1474     static_assert((std::is_same<decltype(std::nexttoward((float)0, (long double)0)), float>::value), "");
1475     static_assert((std::is_same<decltype(std::nexttoward((bool)0, (long double)0)), double>::value), "");
1476     static_assert((std::is_same<decltype(std::nexttoward((unsigned short)0, (long double)0)), double>::value), "");
1477     static_assert((std::is_same<decltype(std::nexttoward((int)0, (long double)0)), double>::value), "");
1478     static_assert((std::is_same<decltype(std::nexttoward((unsigned int)0, (long double)0)), double>::value), "");
1479     static_assert((std::is_same<decltype(std::nexttoward((long)0, (long double)0)), double>::value), "");
1480     static_assert((std::is_same<decltype(std::nexttoward((unsigned long)0, (long double)0)), double>::value), "");
1481     static_assert((std::is_same<decltype(std::nexttoward((long long)0, (long double)0)), double>::value), "");
1482     static_assert((std::is_same<decltype(std::nexttoward((unsigned long long)0, (long double)0)), double>::value), "");
1483     static_assert((std::is_same<decltype(std::nexttoward((double)0, (long double)0)), double>::value), "");
1484     static_assert((std::is_same<decltype(std::nexttoward((long double)0, (long double)0)), long double>::value), "");
1485     static_assert((std::is_same<decltype(std::nexttowardf(0, (long double)0)), float>::value), "");
1486     static_assert((std::is_same<decltype(std::nexttowardl(0, (long double)0)), long double>::value), "");
1487     static_assert((std::is_same<decltype(nexttoward(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1488     assert(std::nexttoward(0, 1) == hexfloat<double>(0x1, 0, -1074));
1489 }
1490
1491 void test_remainder()
1492 {
1493     static_assert((std::is_same<decltype(std::remainder((float)0, (float)0)), float>::value), "");
1494     static_assert((std::is_same<decltype(std::remainder((bool)0, (float)0)), double>::value), "");
1495     static_assert((std::is_same<decltype(std::remainder((unsigned short)0, (double)0)), double>::value), "");
1496     static_assert((std::is_same<decltype(std::remainder((int)0, (long double)0)), long double>::value), "");
1497     static_assert((std::is_same<decltype(std::remainder((float)0, (unsigned int)0)), double>::value), "");
1498     static_assert((std::is_same<decltype(std::remainder((double)0, (long)0)), double>::value), "");
1499     static_assert((std::is_same<decltype(std::remainder((long double)0, (unsigned long)0)), long double>::value), "");
1500     static_assert((std::is_same<decltype(std::remainder((int)0, (long long)0)), double>::value), "");
1501     static_assert((std::is_same<decltype(std::remainder((int)0, (unsigned long long)0)), double>::value), "");
1502     static_assert((std::is_same<decltype(std::remainder((double)0, (double)0)), double>::value), "");
1503     static_assert((std::is_same<decltype(std::remainder((long double)0, (long double)0)), long double>::value), "");
1504     static_assert((std::is_same<decltype(std::remainder((float)0, (double)0)), double>::value), "");
1505     static_assert((std::is_same<decltype(std::remainder((float)0, (long double)0)), long double>::value), "");
1506     static_assert((std::is_same<decltype(std::remainder((double)0, (long double)0)), long double>::value), "");
1507     static_assert((std::is_same<decltype(std::remainderf(0,0)), float>::value), "");
1508     static_assert((std::is_same<decltype(std::remainderl(0,0)), long double>::value), "");
1509     static_assert((std::is_same<decltype(std::remainder((int)0, (int)0)), double>::value), "");
1510     static_assert((std::is_same<decltype(remainder(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1511     assert(std::remainder(0.5,1) == 0.5);
1512 }
1513
1514 void test_remquo()
1515 {
1516     int ip;
1517     static_assert((std::is_same<decltype(std::remquo((float)0, (float)0, &ip)), float>::value), "");
1518     static_assert((std::is_same<decltype(std::remquo((bool)0, (float)0, &ip)), double>::value), "");
1519     static_assert((std::is_same<decltype(std::remquo((unsigned short)0, (double)0, &ip)), double>::value), "");
1520     static_assert((std::is_same<decltype(std::remquo((int)0, (long double)0, &ip)), long double>::value), "");
1521     static_assert((std::is_same<decltype(std::remquo((float)0, (unsigned int)0, &ip)), double>::value), "");
1522     static_assert((std::is_same<decltype(std::remquo((double)0, (long)0, &ip)), double>::value), "");
1523     static_assert((std::is_same<decltype(std::remquo((long double)0, (unsigned long)0, &ip)), long double>::value), "");
1524     static_assert((std::is_same<decltype(std::remquo((int)0, (long long)0, &ip)), double>::value), "");
1525     static_assert((std::is_same<decltype(std::remquo((int)0, (unsigned long long)0, &ip)), double>::value), "");
1526     static_assert((std::is_same<decltype(std::remquo((double)0, (double)0, &ip)), double>::value), "");
1527     static_assert((std::is_same<decltype(std::remquo((long double)0, (long double)0, &ip)), long double>::value), "");
1528     static_assert((std::is_same<decltype(std::remquo((float)0, (double)0, &ip)), double>::value), "");
1529     static_assert((std::is_same<decltype(std::remquo((float)0, (long double)0, &ip)), long double>::value), "");
1530     static_assert((std::is_same<decltype(std::remquo((double)0, (long double)0, &ip)), long double>::value), "");
1531     static_assert((std::is_same<decltype(std::remquof(0,0, &ip)), float>::value), "");
1532     static_assert((std::is_same<decltype(std::remquol(0,0, &ip)), long double>::value), "");
1533     static_assert((std::is_same<decltype(std::remquo((int)0, (int)0, &ip)), double>::value), "");
1534     static_assert((std::is_same<decltype(remquo(Ambiguous(), Ambiguous(), &ip)), Ambiguous>::value), "");
1535     assert(std::remquo(0.5,1, &ip) == 0.5);
1536 }
1537
1538 void test_rint()
1539 {
1540     static_assert((std::is_same<decltype(std::rint((float)0)), float>::value), "");
1541     static_assert((std::is_same<decltype(std::rint((bool)0)), double>::value), "");
1542     static_assert((std::is_same<decltype(std::rint((unsigned short)0)), double>::value), "");
1543     static_assert((std::is_same<decltype(std::rint((int)0)), double>::value), "");
1544     static_assert((std::is_same<decltype(std::rint((unsigned int)0)), double>::value), "");
1545     static_assert((std::is_same<decltype(std::rint((long)0)), double>::value), "");
1546     static_assert((std::is_same<decltype(std::rint((unsigned long)0)), double>::value), "");
1547     static_assert((std::is_same<decltype(std::rint((long long)0)), double>::value), "");
1548     static_assert((std::is_same<decltype(std::rint((unsigned long long)0)), double>::value), "");
1549     static_assert((std::is_same<decltype(std::rint((double)0)), double>::value), "");
1550     static_assert((std::is_same<decltype(std::rint((long double)0)), long double>::value), "");
1551     static_assert((std::is_same<decltype(std::rintf(0)), float>::value), "");
1552     static_assert((std::is_same<decltype(std::rintl(0)), long double>::value), "");
1553     static_assert((std::is_same<decltype(rint(Ambiguous())), Ambiguous>::value), "");
1554     assert(std::rint(1) == 1);
1555 }
1556
1557 void test_round()
1558 {
1559     static_assert((std::is_same<decltype(std::round((float)0)), float>::value), "");
1560     static_assert((std::is_same<decltype(std::round((bool)0)), double>::value), "");
1561     static_assert((std::is_same<decltype(std::round((unsigned short)0)), double>::value), "");
1562     static_assert((std::is_same<decltype(std::round((int)0)), double>::value), "");
1563     static_assert((std::is_same<decltype(std::round((unsigned int)0)), double>::value), "");
1564     static_assert((std::is_same<decltype(std::round((long)0)), double>::value), "");
1565     static_assert((std::is_same<decltype(std::round((unsigned long)0)), double>::value), "");
1566     static_assert((std::is_same<decltype(std::round((long long)0)), double>::value), "");
1567     static_assert((std::is_same<decltype(std::round((unsigned long long)0)), double>::value), "");
1568     static_assert((std::is_same<decltype(std::round((double)0)), double>::value), "");
1569     static_assert((std::is_same<decltype(std::round((long double)0)), long double>::value), "");
1570     static_assert((std::is_same<decltype(std::roundf(0)), float>::value), "");
1571     static_assert((std::is_same<decltype(std::roundl(0)), long double>::value), "");
1572     static_assert((std::is_same<decltype(round(Ambiguous())), Ambiguous>::value), "");
1573     assert(std::round(1) == 1);
1574 }
1575
1576 void test_scalbln()
1577 {
1578     static_assert((std::is_same<decltype(std::scalbln((float)0, (long)0)), float>::value), "");
1579     static_assert((std::is_same<decltype(std::scalbln((bool)0, (long)0)), double>::value), "");
1580     static_assert((std::is_same<decltype(std::scalbln((unsigned short)0, (long)0)), double>::value), "");
1581     static_assert((std::is_same<decltype(std::scalbln((int)0, (long)0)), double>::value), "");
1582     static_assert((std::is_same<decltype(std::scalbln((unsigned int)0, (long)0)), double>::value), "");
1583     static_assert((std::is_same<decltype(std::scalbln((long)0, (long)0)), double>::value), "");
1584     static_assert((std::is_same<decltype(std::scalbln((unsigned long)0, (long)0)), double>::value), "");
1585     static_assert((std::is_same<decltype(std::scalbln((long long)0, (long)0)), double>::value), "");
1586     static_assert((std::is_same<decltype(std::scalbln((unsigned long long)0, (long)0)), double>::value), "");
1587     static_assert((std::is_same<decltype(std::scalbln((double)0, (long)0)), double>::value), "");
1588     static_assert((std::is_same<decltype(std::scalbln((long double)0, (long)0)), long double>::value), "");
1589     static_assert((std::is_same<decltype(std::scalblnf(0, (long)0)), float>::value), "");
1590     static_assert((std::is_same<decltype(std::scalblnl(0, (long)0)), long double>::value), "");
1591     static_assert((std::is_same<decltype(scalbln(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1592     assert(std::scalbln(1, 1) == 2);
1593 }
1594
1595 void test_scalbn()
1596 {
1597     static_assert((std::is_same<decltype(std::scalbn((float)0, (int)0)), float>::value), "");
1598     static_assert((std::is_same<decltype(std::scalbn((bool)0, (int)0)), double>::value), "");
1599     static_assert((std::is_same<decltype(std::scalbn((unsigned short)0, (int)0)), double>::value), "");
1600     static_assert((std::is_same<decltype(std::scalbn((int)0, (int)0)), double>::value), "");
1601     static_assert((std::is_same<decltype(std::scalbn((unsigned int)0, (int)0)), double>::value), "");
1602     static_assert((std::is_same<decltype(std::scalbn((long)0, (int)0)), double>::value), "");
1603     static_assert((std::is_same<decltype(std::scalbn((unsigned long)0, (int)0)), double>::value), "");
1604     static_assert((std::is_same<decltype(std::scalbn((long long)0, (int)0)), double>::value), "");
1605     static_assert((std::is_same<decltype(std::scalbn((unsigned long long)0, (int)0)), double>::value), "");
1606     static_assert((std::is_same<decltype(std::scalbn((double)0, (int)0)), double>::value), "");
1607     static_assert((std::is_same<decltype(std::scalbn((long double)0, (int)0)), long double>::value), "");
1608     static_assert((std::is_same<decltype(std::scalbnf(0, (int)0)), float>::value), "");
1609     static_assert((std::is_same<decltype(std::scalbnl(0, (int)0)), long double>::value), "");
1610     static_assert((std::is_same<decltype(scalbn(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1611     assert(std::scalbn(1, 1) == 2);
1612 }
1613
1614 void test_tgamma()
1615 {
1616     static_assert((std::is_same<decltype(std::tgamma((float)0)), float>::value), "");
1617     static_assert((std::is_same<decltype(std::tgamma((bool)0)), double>::value), "");
1618     static_assert((std::is_same<decltype(std::tgamma((unsigned short)0)), double>::value), "");
1619     static_assert((std::is_same<decltype(std::tgamma((int)0)), double>::value), "");
1620     static_assert((std::is_same<decltype(std::tgamma((unsigned int)0)), double>::value), "");
1621     static_assert((std::is_same<decltype(std::tgamma((long)0)), double>::value), "");
1622     static_assert((std::is_same<decltype(std::tgamma((unsigned long)0)), double>::value), "");
1623     static_assert((std::is_same<decltype(std::tgamma((long long)0)), double>::value), "");
1624     static_assert((std::is_same<decltype(std::tgamma((unsigned long long)0)), double>::value), "");
1625     static_assert((std::is_same<decltype(std::tgamma((double)0)), double>::value), "");
1626     static_assert((std::is_same<decltype(std::tgamma((long double)0)), long double>::value), "");
1627     static_assert((std::is_same<decltype(std::tgammaf(0)), float>::value), "");
1628     static_assert((std::is_same<decltype(std::tgammal(0)), long double>::value), "");
1629     static_assert((std::is_same<decltype(tgamma(Ambiguous())), Ambiguous>::value), "");
1630     assert(std::tgamma(1) == 1);
1631 }
1632
1633 void test_trunc()
1634 {
1635     static_assert((std::is_same<decltype(std::trunc((float)0)), float>::value), "");
1636     static_assert((std::is_same<decltype(std::trunc((bool)0)), double>::value), "");
1637     static_assert((std::is_same<decltype(std::trunc((unsigned short)0)), double>::value), "");
1638     static_assert((std::is_same<decltype(std::trunc((int)0)), double>::value), "");
1639     static_assert((std::is_same<decltype(std::trunc((unsigned int)0)), double>::value), "");
1640     static_assert((std::is_same<decltype(std::trunc((long)0)), double>::value), "");
1641     static_assert((std::is_same<decltype(std::trunc((unsigned long)0)), double>::value), "");
1642     static_assert((std::is_same<decltype(std::trunc((long long)0)), double>::value), "");
1643     static_assert((std::is_same<decltype(std::trunc((unsigned long long)0)), double>::value), "");
1644     static_assert((std::is_same<decltype(std::trunc((double)0)), double>::value), "");
1645     static_assert((std::is_same<decltype(std::trunc((long double)0)), long double>::value), "");
1646     static_assert((std::is_same<decltype(std::truncf(0)), float>::value), "");
1647     static_assert((std::is_same<decltype(std::truncl(0)), long double>::value), "");
1648     static_assert((std::is_same<decltype(trunc(Ambiguous())), Ambiguous>::value), "");
1649     assert(std::trunc(1) == 1);
1650 }
1651
1652 int main(int, char**)
1653 {
1654     test_abs();
1655     test_acos();
1656     test_asin();
1657     test_atan();
1658     test_atan2();
1659     test_ceil();
1660     test_cos();
1661     test_cosh();
1662     test_exp();
1663     test_fabs();
1664     test_floor();
1665     test_fmod();
1666     test_frexp();
1667     test_ldexp();
1668     test_log();
1669     test_log10();
1670     test_modf();
1671     test_pow();
1672     test_sin();
1673     test_sinh();
1674     test_sqrt();
1675     test_tan();
1676     test_tanh();
1677     test_signbit();
1678     test_fpclassify();
1679     test_isfinite();
1680     test_isnormal();
1681     test_isgreater();
1682     test_isgreaterequal();
1683     test_isinf();
1684     test_isless();
1685     test_islessequal();
1686     test_islessgreater();
1687     test_isnan();
1688     test_isunordered();
1689     test_acosh();
1690     test_asinh();
1691     test_atanh();
1692     test_cbrt();
1693     test_copysign();
1694     test_erf();
1695     test_erfc();
1696     test_exp2();
1697     test_expm1();
1698     test_fdim();
1699     test_fma();
1700     test_fmax();
1701     test_fmin();
1702     test_hypot();
1703     test_ilogb();
1704     test_lerp();
1705     test_lgamma();
1706     test_llrint();
1707     test_llround();
1708     test_log1p();
1709     test_log2();
1710     test_logb();
1711     test_lrint();
1712     test_lround();
1713     test_nan();
1714     test_nearbyint();
1715     test_nextafter();
1716     test_nexttoward();
1717     test_remainder();
1718     test_remquo();
1719     test_rint();
1720     test_round();
1721     test_scalbln();
1722     test_scalbn();
1723     test_tgamma();
1724     test_trunc();
1725
1726   return 0;
1727 }