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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <cmath>
     11 
     12 #include <cmath>
     13 #include <type_traits>
     14 #include <cassert>
     15 
     16 #include "test_macros.h"
     17 #include "hexfloat.h"
     18 
     19 // convertible to int/float/double/etc
     20 template <class T, int N=0>
     21 struct Value {
     22     operator T () { return T(N); }
     23 };
     24 
     25 // See PR21083
     26 // Ambiguous is a user-defined type that defines its own overloads of cmath
     27 // functions. When the std overloads are candidates too (by using or adl),
     28 // they should not interfere.
     29 struct Ambiguous : std::true_type { // ADL
     30     operator float () { return 0.f; }
     31     operator double () { return 0.; }
     32 };
     33 Ambiguous abs(Ambiguous){ return Ambiguous(); }
     34 Ambiguous acos(Ambiguous){ return Ambiguous(); }
     35 Ambiguous asin(Ambiguous){ return Ambiguous(); }
     36 Ambiguous atan(Ambiguous){ return Ambiguous(); }
     37 Ambiguous atan2(Ambiguous, Ambiguous){ return Ambiguous(); }
     38 Ambiguous ceil(Ambiguous){ return Ambiguous(); }
     39 Ambiguous cos(Ambiguous){ return Ambiguous(); }
     40 Ambiguous cosh(Ambiguous){ return Ambiguous(); }
     41 Ambiguous exp(Ambiguous){ return Ambiguous(); }
     42 Ambiguous fabs(Ambiguous){ return Ambiguous(); }
     43 Ambiguous floor(Ambiguous){ return Ambiguous(); }
     44 Ambiguous fmod(Ambiguous, Ambiguous){ return Ambiguous(); }
     45 Ambiguous frexp(Ambiguous, int*){ return Ambiguous(); }
     46 Ambiguous ldexp(Ambiguous, int){ return Ambiguous(); }
     47 Ambiguous log(Ambiguous){ return Ambiguous(); }
     48 Ambiguous log10(Ambiguous){ return Ambiguous(); }
     49 Ambiguous modf(Ambiguous, Ambiguous*){ return Ambiguous(); }
     50 Ambiguous pow(Ambiguous, Ambiguous){ return Ambiguous(); }
     51 Ambiguous sin(Ambiguous){ return Ambiguous(); }
     52 Ambiguous sinh(Ambiguous){ return Ambiguous(); }
     53 Ambiguous sqrt(Ambiguous){ return Ambiguous(); }
     54 Ambiguous tan(Ambiguous){ return Ambiguous(); }
     55 Ambiguous tanh(Ambiguous){ return Ambiguous(); }
     56 Ambiguous signbit(Ambiguous){ return Ambiguous(); }
     57 Ambiguous fpclassify(Ambiguous){ return Ambiguous(); }
     58 Ambiguous isfinite(Ambiguous){ return Ambiguous(); }
     59 Ambiguous isnormal(Ambiguous){ return Ambiguous(); }
     60 Ambiguous isgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
     61 Ambiguous isgreaterequal(Ambiguous, Ambiguous){ return Ambiguous(); }
     62 Ambiguous isless(Ambiguous, Ambiguous){ return Ambiguous(); }
     63 Ambiguous islessequal(Ambiguous, Ambiguous){ return Ambiguous(); }
     64 Ambiguous islessgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
     65 Ambiguous isunordered(Ambiguous, Ambiguous){ return Ambiguous(); }
     66 Ambiguous acosh(Ambiguous){ return Ambiguous(); }
     67 Ambiguous asinh(Ambiguous){ return Ambiguous(); }
     68 Ambiguous atanh(Ambiguous){ return Ambiguous(); }
     69 Ambiguous cbrt(Ambiguous){ return Ambiguous(); }
     70 Ambiguous copysign(Ambiguous, Ambiguous){ return Ambiguous(); }
     71 Ambiguous erf(Ambiguous){ return Ambiguous(); }
     72 Ambiguous erfc(Ambiguous){ return Ambiguous(); }
     73 Ambiguous exp2(Ambiguous){ return Ambiguous(); }
     74 Ambiguous expm1(Ambiguous){ return Ambiguous(); }
     75 Ambiguous fdim(Ambiguous, Ambiguous){ return Ambiguous(); }
     76 Ambiguous fma(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
     77 Ambiguous fmax(Ambiguous, Ambiguous){ return Ambiguous(); }
     78 Ambiguous fmin(Ambiguous, Ambiguous){ return Ambiguous(); }
     79 Ambiguous hypot(Ambiguous, Ambiguous){ return Ambiguous(); }
     80 Ambiguous hypot(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
     81 Ambiguous ilogb(Ambiguous){ return Ambiguous(); }
     82 Ambiguous lgamma(Ambiguous){ return Ambiguous(); }
     83 Ambiguous llrint(Ambiguous){ return Ambiguous(); }
     84 Ambiguous llround(Ambiguous){ return Ambiguous(); }
     85 Ambiguous log1p(Ambiguous){ return Ambiguous(); }
     86 Ambiguous log2(Ambiguous){ return Ambiguous(); }
     87 Ambiguous logb(Ambiguous){ return Ambiguous(); }
     88 Ambiguous lrint(Ambiguous){ return Ambiguous(); }
     89 Ambiguous lround(Ambiguous){ return Ambiguous(); }
     90 Ambiguous nearbyint(Ambiguous){ return Ambiguous(); }
     91 Ambiguous nextafter(Ambiguous, Ambiguous){ return Ambiguous(); }
     92 Ambiguous nexttoward(Ambiguous, Ambiguous){ return Ambiguous(); }
     93 Ambiguous remainder(Ambiguous, Ambiguous){ return Ambiguous(); }
     94 Ambiguous remquo(Ambiguous, Ambiguous, int*){ return Ambiguous(); }
     95 Ambiguous rint(Ambiguous){ return Ambiguous(); }
     96 Ambiguous round(Ambiguous){ return Ambiguous(); }
     97 Ambiguous scalbln(Ambiguous, Ambiguous){ return Ambiguous(); }
     98 Ambiguous scalbn(Ambiguous, Ambiguous){ return Ambiguous(); }
     99 Ambiguous tgamma(Ambiguous){ return Ambiguous(); }
    100 Ambiguous trunc(Ambiguous){ return Ambiguous(); }
    101 
    102 void test_abs()
    103 {
    104     static_assert((std::is_same<decltype(std::abs((float)0)), float>::value), "");
    105     static_assert((std::is_same<decltype(std::abs((double)0)), double>::value), "");
    106     static_assert((std::is_same<decltype(std::abs((long double)0)), long double>::value), "");
    107     static_assert((std::is_same<decltype(abs(Ambiguous())), Ambiguous>::value), "");
    108     assert(std::abs(-1.) == 1);
    109 }
    110 
    111 void test_acos()
    112 {
    113     static_assert((std::is_same<decltype(std::acos((float)0)), float>::value), "");
    114     static_assert((std::is_same<decltype(std::acos((bool)0)), double>::value), "");
    115     static_assert((std::is_same<decltype(std::acos((unsigned short)0)), double>::value), "");
    116     static_assert((std::is_same<decltype(std::acos((int)0)), double>::value), "");
    117     static_assert((std::is_same<decltype(std::acos((unsigned int)0)), double>::value), "");
    118     static_assert((std::is_same<decltype(std::acos((long)0)), double>::value), "");
    119     static_assert((std::is_same<decltype(std::acos((unsigned long)0)), double>::value), "");
    120     static_assert((std::is_same<decltype(std::acos((long long)0)), double>::value), "");
    121     static_assert((std::is_same<decltype(std::acos((unsigned long long)0)), double>::value), "");
    122     static_assert((std::is_same<decltype(std::acos((double)0)), double>::value), "");
    123     static_assert((std::is_same<decltype(std::acos((long double)0)), long double>::value), "");
    124     static_assert((std::is_same<decltype(std::acosf(0)), float>::value), "");
    125     static_assert((std::is_same<decltype(std::acosl(0)), long double>::value), "");
    126     static_assert((std::is_same<decltype(acos(Ambiguous())), Ambiguous>::value), "");
    127     assert(std::acos(1) == 0);
    128 }
    129 
    130 void test_asin()
    131 {
    132     static_assert((std::is_same<decltype(std::asin((float)0)), float>::value), "");
    133     static_assert((std::is_same<decltype(std::asin((bool)0)), double>::value), "");
    134     static_assert((std::is_same<decltype(std::asin((unsigned short)0)), double>::value), "");
    135     static_assert((std::is_same<decltype(std::asin((int)0)), double>::value), "");
    136     static_assert((std::is_same<decltype(std::asin((unsigned int)0)), double>::value), "");
    137     static_assert((std::is_same<decltype(std::asin((long)0)), double>::value), "");
    138     static_assert((std::is_same<decltype(std::asin((unsigned long)0)), double>::value), "");
    139     static_assert((std::is_same<decltype(std::asin((long long)0)), double>::value), "");
    140     static_assert((std::is_same<decltype(std::asin((unsigned long long)0)), double>::value), "");
    141     static_assert((std::is_same<decltype(std::asin((double)0)), double>::value), "");
    142     static_assert((std::is_same<decltype(std::asin((long double)0)), long double>::value), "");
    143     static_assert((std::is_same<decltype(std::asinf(0)), float>::value), "");
    144     static_assert((std::is_same<decltype(std::asinl(0)), long double>::value), "");
    145     static_assert((std::is_same<decltype(asin(Ambiguous())), Ambiguous>::value), "");
    146     assert(std::asin(0) == 0);
    147 }
    148 
    149 void test_atan()
    150 {
    151     static_assert((std::is_same<decltype(std::atan((float)0)), float>::value), "");
    152     static_assert((std::is_same<decltype(std::atan((bool)0)), double>::value), "");
    153     static_assert((std::is_same<decltype(std::atan((unsigned short)0)), double>::value), "");
    154     static_assert((std::is_same<decltype(std::atan((int)0)), double>::value), "");
    155     static_assert((std::is_same<decltype(std::atan((unsigned int)0)), double>::value), "");
    156     static_assert((std::is_same<decltype(std::atan((long)0)), double>::value), "");
    157     static_assert((std::is_same<decltype(std::atan((unsigned long)0)), double>::value), "");
    158     static_assert((std::is_same<decltype(std::atan((long long)0)), double>::value), "");
    159     static_assert((std::is_same<decltype(std::atan((unsigned long long)0)), double>::value), "");
    160     static_assert((std::is_same<decltype(std::atan((double)0)), double>::value), "");
    161     static_assert((std::is_same<decltype(std::atan((long double)0)), long double>::value), "");
    162     static_assert((std::is_same<decltype(std::atanf(0)), float>::value), "");
    163     static_assert((std::is_same<decltype(std::atanl(0)), long double>::value), "");
    164     static_assert((std::is_same<decltype(atan(Ambiguous())), Ambiguous>::value), "");
    165     assert(std::atan(0) == 0);
    166 }
    167 
    168 void test_atan2()
    169 {
    170     static_assert((std::is_same<decltype(std::atan2((float)0, (float)0)), float>::value), "");
    171     static_assert((std::is_same<decltype(std::atan2((bool)0, (float)0)), double>::value), "");
    172     static_assert((std::is_same<decltype(std::atan2((unsigned short)0, (double)0)), double>::value), "");
    173     static_assert((std::is_same<decltype(std::atan2((int)0, (long double)0)), long double>::value), "");
    174     static_assert((std::is_same<decltype(std::atan2((float)0, (unsigned int)0)), double>::value), "");
    175     static_assert((std::is_same<decltype(std::atan2((double)0, (long)0)), double>::value), "");
    176     static_assert((std::is_same<decltype(std::atan2((long double)0, (unsigned long)0)), long double>::value), "");
    177     static_assert((std::is_same<decltype(std::atan2((int)0, (long long)0)), double>::value), "");
    178     static_assert((std::is_same<decltype(std::atan2((int)0, (unsigned long long)0)), double>::value), "");
    179     static_assert((std::is_same<decltype(std::atan2((double)0, (double)0)), double>::value), "");
    180     static_assert((std::is_same<decltype(std::atan2((long double)0, (long double)0)), long double>::value), "");
    181     static_assert((std::is_same<decltype(std::atan2((float)0, (double)0)), double>::value), "");
    182     static_assert((std::is_same<decltype(std::atan2((float)0, (long double)0)), long double>::value), "");
    183     static_assert((std::is_same<decltype(std::atan2((double)0, (long double)0)), long double>::value), "");
    184     static_assert((std::is_same<decltype(std::atan2f(0,0)), float>::value), "");
    185     static_assert((std::is_same<decltype(std::atan2l(0,0)), long double>::value), "");
    186     static_assert((std::is_same<decltype(std::atan2((int)0, (int)0)), double>::value), "");
    187     static_assert((std::is_same<decltype(atan2(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    188     assert(std::atan2(0,1) == 0);
    189 }
    190 
    191 void test_ceil()
    192 {
    193     static_assert((std::is_same<decltype(std::ceil((float)0)), float>::value), "");
    194     static_assert((std::is_same<decltype(std::ceil((bool)0)), double>::value), "");
    195     static_assert((std::is_same<decltype(std::ceil((unsigned short)0)), double>::value), "");
    196     static_assert((std::is_same<decltype(std::ceil((int)0)), double>::value), "");
    197     static_assert((std::is_same<decltype(std::ceil((unsigned int)0)), double>::value), "");
    198     static_assert((std::is_same<decltype(std::ceil((long)0)), double>::value), "");
    199     static_assert((std::is_same<decltype(std::ceil((unsigned long)0)), double>::value), "");
    200     static_assert((std::is_same<decltype(std::ceil((long long)0)), double>::value), "");
    201     static_assert((std::is_same<decltype(std::ceil((unsigned long long)0)), double>::value), "");
    202     static_assert((std::is_same<decltype(std::ceil((double)0)), double>::value), "");
    203     static_assert((std::is_same<decltype(std::ceil((long double)0)), long double>::value), "");
    204     static_assert((std::is_same<decltype(std::ceilf(0)), float>::value), "");
    205     static_assert((std::is_same<decltype(std::ceill(0)), long double>::value), "");
    206     static_assert((std::is_same<decltype(ceil(Ambiguous())), Ambiguous>::value), "");
    207     assert(std::ceil(0) == 0);
    208 }
    209 
    210 void test_cos()
    211 {
    212     static_assert((std::is_same<decltype(std::cos((float)0)), float>::value), "");
    213     static_assert((std::is_same<decltype(std::cos((bool)0)), double>::value), "");
    214     static_assert((std::is_same<decltype(std::cos((unsigned short)0)), double>::value), "");
    215     static_assert((std::is_same<decltype(std::cos((int)0)), double>::value), "");
    216     static_assert((std::is_same<decltype(std::cos((unsigned int)0)), double>::value), "");
    217     static_assert((std::is_same<decltype(std::cos((long)0)), double>::value), "");
    218     static_assert((std::is_same<decltype(std::cos((unsigned long)0)), double>::value), "");
    219     static_assert((std::is_same<decltype(std::cos((long long)0)), double>::value), "");
    220     static_assert((std::is_same<decltype(std::cos((unsigned long long)0)), double>::value), "");
    221     static_assert((std::is_same<decltype(std::cos((double)0)), double>::value), "");
    222     static_assert((std::is_same<decltype(std::cos((long double)0)), long double>::value), "");
    223     static_assert((std::is_same<decltype(std::cosf(0)), float>::value), "");
    224     static_assert((std::is_same<decltype(std::cosl(0)), long double>::value), "");
    225     static_assert((std::is_same<decltype(cos(Ambiguous())), Ambiguous>::value), "");
    226     assert(std::cos(0) == 1);
    227 }
    228 
    229 void test_cosh()
    230 {
    231     static_assert((std::is_same<decltype(std::cosh((float)0)), float>::value), "");
    232     static_assert((std::is_same<decltype(std::cosh((bool)0)), double>::value), "");
    233     static_assert((std::is_same<decltype(std::cosh((unsigned short)0)), double>::value), "");
    234     static_assert((std::is_same<decltype(std::cosh((int)0)), double>::value), "");
    235     static_assert((std::is_same<decltype(std::cosh((unsigned int)0)), double>::value), "");
    236     static_assert((std::is_same<decltype(std::cosh((long)0)), double>::value), "");
    237     static_assert((std::is_same<decltype(std::cosh((unsigned long)0)), double>::value), "");
    238     static_assert((std::is_same<decltype(std::cosh((long long)0)), double>::value), "");
    239     static_assert((std::is_same<decltype(std::cosh((unsigned long long)0)), double>::value), "");
    240     static_assert((std::is_same<decltype(std::cosh((double)0)), double>::value), "");
    241     static_assert((std::is_same<decltype(std::cosh((long double)0)), long double>::value), "");
    242     static_assert((std::is_same<decltype(std::coshf(0)), float>::value), "");
    243     static_assert((std::is_same<decltype(std::coshl(0)), long double>::value), "");
    244     static_assert((std::is_same<decltype(cosh(Ambiguous())), Ambiguous>::value), "");
    245     assert(std::cosh(0) == 1);
    246 }
    247 
    248 void test_exp()
    249 {
    250     static_assert((std::is_same<decltype(std::exp((float)0)), float>::value), "");
    251     static_assert((std::is_same<decltype(std::exp((bool)0)), double>::value), "");
    252     static_assert((std::is_same<decltype(std::exp((unsigned short)0)), double>::value), "");
    253     static_assert((std::is_same<decltype(std::exp((int)0)), double>::value), "");
    254     static_assert((std::is_same<decltype(std::exp((unsigned int)0)), double>::value), "");
    255     static_assert((std::is_same<decltype(std::exp((long)0)), double>::value), "");
    256     static_assert((std::is_same<decltype(std::exp((unsigned long)0)), double>::value), "");
    257     static_assert((std::is_same<decltype(std::exp((long long)0)), double>::value), "");
    258     static_assert((std::is_same<decltype(std::exp((unsigned long long)0)), double>::value), "");
    259     static_assert((std::is_same<decltype(std::exp((double)0)), double>::value), "");
    260     static_assert((std::is_same<decltype(std::exp((long double)0)), long double>::value), "");
    261     static_assert((std::is_same<decltype(std::expf(0)), float>::value), "");
    262     static_assert((std::is_same<decltype(std::expl(0)), long double>::value), "");
    263     static_assert((std::is_same<decltype(exp(Ambiguous())), Ambiguous>::value), "");
    264     assert(std::exp(0) == 1);
    265 }
    266 
    267 void test_fabs()
    268 {
    269     static_assert((std::is_same<decltype(std::fabs((float)0)), float>::value), "");
    270     static_assert((std::is_same<decltype(std::fabs((bool)0)), double>::value), "");
    271     static_assert((std::is_same<decltype(std::fabs((unsigned short)0)), double>::value), "");
    272     static_assert((std::is_same<decltype(std::fabs((int)0)), double>::value), "");
    273     static_assert((std::is_same<decltype(std::fabs((unsigned int)0)), double>::value), "");
    274     static_assert((std::is_same<decltype(std::fabs((long)0)), double>::value), "");
    275     static_assert((std::is_same<decltype(std::fabs((unsigned long)0)), double>::value), "");
    276     static_assert((std::is_same<decltype(std::fabs((long long)0)), double>::value), "");
    277     static_assert((std::is_same<decltype(std::fabs((unsigned long long)0)), double>::value), "");
    278     static_assert((std::is_same<decltype(std::fabs((double)0)), double>::value), "");
    279     static_assert((std::is_same<decltype(std::fabs((long double)0)), long double>::value), "");
    280     static_assert((std::is_same<decltype(std::fabsf(0.0f)), float>::value), "");
    281     static_assert((std::is_same<decltype(std::fabsl(0.0L)), long double>::value), "");
    282     static_assert((std::is_same<decltype(fabs(Ambiguous())), Ambiguous>::value), "");
    283     assert(std::fabs(-1) == 1);
    284 }
    285 
    286 void test_floor()
    287 {
    288     static_assert((std::is_same<decltype(std::floor((float)0)), float>::value), "");
    289     static_assert((std::is_same<decltype(std::floor((bool)0)), double>::value), "");
    290     static_assert((std::is_same<decltype(std::floor((unsigned short)0)), double>::value), "");
    291     static_assert((std::is_same<decltype(std::floor((int)0)), double>::value), "");
    292     static_assert((std::is_same<decltype(std::floor((unsigned int)0)), double>::value), "");
    293     static_assert((std::is_same<decltype(std::floor((long)0)), double>::value), "");
    294     static_assert((std::is_same<decltype(std::floor((unsigned long)0)), double>::value), "");
    295     static_assert((std::is_same<decltype(std::floor((long long)0)), double>::value), "");
    296     static_assert((std::is_same<decltype(std::floor((unsigned long long)0)), double>::value), "");
    297     static_assert((std::is_same<decltype(std::floor((double)0)), double>::value), "");
    298     static_assert((std::is_same<decltype(std::floor((long double)0)), long double>::value), "");
    299     static_assert((std::is_same<decltype(std::floorf(0)), float>::value), "");
    300     static_assert((std::is_same<decltype(std::floorl(0)), long double>::value), "");
    301     static_assert((std::is_same<decltype(floor(Ambiguous())), Ambiguous>::value), "");
    302     assert(std::floor(1) == 1);
    303 }
    304 
    305 void test_fmod()
    306 {
    307     static_assert((std::is_same<decltype(std::fmod((float)0, (float)0)), float>::value), "");
    308     static_assert((std::is_same<decltype(std::fmod((bool)0, (float)0)), double>::value), "");
    309     static_assert((std::is_same<decltype(std::fmod((unsigned short)0, (double)0)), double>::value), "");
    310     static_assert((std::is_same<decltype(std::fmod((int)0, (long double)0)), long double>::value), "");
    311     static_assert((std::is_same<decltype(std::fmod((float)0, (unsigned int)0)), double>::value), "");
    312     static_assert((std::is_same<decltype(std::fmod((double)0, (long)0)), double>::value), "");
    313     static_assert((std::is_same<decltype(std::fmod((long double)0, (unsigned long)0)), long double>::value), "");
    314     static_assert((std::is_same<decltype(std::fmod((int)0, (long long)0)), double>::value), "");
    315     static_assert((std::is_same<decltype(std::fmod((int)0, (unsigned long long)0)), double>::value), "");
    316     static_assert((std::is_same<decltype(std::fmod((double)0, (double)0)), double>::value), "");
    317     static_assert((std::is_same<decltype(std::fmod((long double)0, (long double)0)), long double>::value), "");
    318     static_assert((std::is_same<decltype(std::fmod((float)0, (double)0)), double>::value), "");
    319     static_assert((std::is_same<decltype(std::fmod((float)0, (long double)0)), long double>::value), "");
    320     static_assert((std::is_same<decltype(std::fmod((double)0, (long double)0)), long double>::value), "");
    321     static_assert((std::is_same<decltype(std::fmodf(0,0)), float>::value), "");
    322     static_assert((std::is_same<decltype(std::fmodl(0,0)), long double>::value), "");
    323     static_assert((std::is_same<decltype(std::fmod((int)0, (int)0)), double>::value), "");
    324     static_assert((std::is_same<decltype(fmod(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    325     assert(std::fmod(1.5,1) == .5);
    326 }
    327 
    328 void test_frexp()
    329 {
    330     int ip;
    331     static_assert((std::is_same<decltype(std::frexp((float)0, &ip)), float>::value), "");
    332     static_assert((std::is_same<decltype(std::frexp((bool)0, &ip)), double>::value), "");
    333     static_assert((std::is_same<decltype(std::frexp((unsigned short)0, &ip)), double>::value), "");
    334     static_assert((std::is_same<decltype(std::frexp((int)0, &ip)), double>::value), "");
    335     static_assert((std::is_same<decltype(std::frexp((unsigned int)0, &ip)), double>::value), "");
    336     static_assert((std::is_same<decltype(std::frexp((long)0, &ip)), double>::value), "");
    337     static_assert((std::is_same<decltype(std::frexp((unsigned long)0, &ip)), double>::value), "");
    338     static_assert((std::is_same<decltype(std::frexp((long long)0, &ip)), double>::value), "");
    339     static_assert((std::is_same<decltype(std::frexp((unsigned long long)0, &ip)), double>::value), "");
    340     static_assert((std::is_same<decltype(std::frexp((double)0, &ip)), double>::value), "");
    341     static_assert((std::is_same<decltype(std::frexp((long double)0, &ip)), long double>::value), "");
    342     static_assert((std::is_same<decltype(std::frexpf(0, &ip)), float>::value), "");
    343     static_assert((std::is_same<decltype(std::frexpl(0, &ip)), long double>::value), "");
    344     static_assert((std::is_same<decltype(frexp(Ambiguous(), &ip)), Ambiguous>::value), "");
    345     assert(std::frexp(0, &ip) == 0);
    346 }
    347 
    348 void test_ldexp()
    349 {
    350     int ip = 1;
    351     static_assert((std::is_same<decltype(std::ldexp((float)0, ip)), float>::value), "");
    352     static_assert((std::is_same<decltype(std::ldexp((bool)0, ip)), double>::value), "");
    353     static_assert((std::is_same<decltype(std::ldexp((unsigned short)0, ip)), double>::value), "");
    354     static_assert((std::is_same<decltype(std::ldexp((int)0, ip)), double>::value), "");
    355     static_assert((std::is_same<decltype(std::ldexp((unsigned int)0, ip)), double>::value), "");
    356     static_assert((std::is_same<decltype(std::ldexp((long)0, ip)), double>::value), "");
    357     static_assert((std::is_same<decltype(std::ldexp((unsigned long)0, ip)), double>::value), "");
    358     static_assert((std::is_same<decltype(std::ldexp((long long)0, ip)), double>::value), "");
    359     static_assert((std::is_same<decltype(std::ldexp((unsigned long long)0, ip)), double>::value), "");
    360     static_assert((std::is_same<decltype(std::ldexp((double)0, ip)), double>::value), "");
    361     static_assert((std::is_same<decltype(std::ldexp((long double)0, ip)), long double>::value), "");
    362     static_assert((std::is_same<decltype(std::ldexpf(0, ip)), float>::value), "");
    363     static_assert((std::is_same<decltype(std::ldexpl(0, ip)), long double>::value), "");
    364     static_assert((std::is_same<decltype(ldexp(Ambiguous(), ip)), Ambiguous>::value), "");
    365     assert(std::ldexp(1, ip) == 2);
    366 }
    367 
    368 void test_log()
    369 {
    370     static_assert((std::is_same<decltype(std::log((float)0)), float>::value), "");
    371     static_assert((std::is_same<decltype(std::log((bool)0)), double>::value), "");
    372     static_assert((std::is_same<decltype(std::log((unsigned short)0)), double>::value), "");
    373     static_assert((std::is_same<decltype(std::log((int)0)), double>::value), "");
    374     static_assert((std::is_same<decltype(std::log((unsigned int)0)), double>::value), "");
    375     static_assert((std::is_same<decltype(std::log((long)0)), double>::value), "");
    376     static_assert((std::is_same<decltype(std::log((unsigned long)0)), double>::value), "");
    377     static_assert((std::is_same<decltype(std::log((long long)0)), double>::value), "");
    378     static_assert((std::is_same<decltype(std::log((unsigned long long)0)), double>::value), "");
    379     static_assert((std::is_same<decltype(std::log((double)0)), double>::value), "");
    380     static_assert((std::is_same<decltype(std::log((long double)0)), long double>::value), "");
    381     static_assert((std::is_same<decltype(std::logf(0)), float>::value), "");
    382     static_assert((std::is_same<decltype(std::logl(0)), long double>::value), "");
    383     static_assert((std::is_same<decltype(log(Ambiguous())), Ambiguous>::value), "");
    384     assert(std::log(1) == 0);
    385 }
    386 
    387 void test_log10()
    388 {
    389     static_assert((std::is_same<decltype(std::log10((float)0)), float>::value), "");
    390     static_assert((std::is_same<decltype(std::log10((bool)0)), double>::value), "");
    391     static_assert((std::is_same<decltype(std::log10((unsigned short)0)), double>::value), "");
    392     static_assert((std::is_same<decltype(std::log10((int)0)), double>::value), "");
    393     static_assert((std::is_same<decltype(std::log10((unsigned int)0)), double>::value), "");
    394     static_assert((std::is_same<decltype(std::log10((long)0)), double>::value), "");
    395     static_assert((std::is_same<decltype(std::log10((unsigned long)0)), double>::value), "");
    396     static_assert((std::is_same<decltype(std::log10((long long)0)), double>::value), "");
    397     static_assert((std::is_same<decltype(std::log10((unsigned long long)0)), double>::value), "");
    398     static_assert((std::is_same<decltype(std::log10((double)0)), double>::value), "");
    399     static_assert((std::is_same<decltype(std::log10((long double)0)), long double>::value), "");
    400     static_assert((std::is_same<decltype(std::log10f(0)), float>::value), "");
    401     static_assert((std::is_same<decltype(std::log10l(0)), long double>::value), "");
    402     static_assert((std::is_same<decltype(log10(Ambiguous())), Ambiguous>::value), "");
    403     assert(std::log10(1) == 0);
    404 }
    405 
    406 void test_modf()
    407 {
    408     static_assert((std::is_same<decltype(std::modf((float)0, (float*)0)), float>::value), "");
    409     static_assert((std::is_same<decltype(std::modf((double)0, (double*)0)), double>::value), "");
    410     static_assert((std::is_same<decltype(std::modf((long double)0, (long double*)0)), long double>::value), "");
    411     static_assert((std::is_same<decltype(std::modff(0, (float*)0)), float>::value), "");
    412     static_assert((std::is_same<decltype(std::modfl(0, (long double*)0)), long double>::value), "");
    413     static_assert((std::is_same<decltype(modf(Ambiguous(), (Ambiguous*)0)), Ambiguous>::value), "");
    414     double i;
    415     assert(std::modf(1., &i) == 0);
    416 }
    417 
    418 void test_pow()
    419 {
    420     static_assert((std::is_same<decltype(std::pow((float)0, (float)0)), float>::value), "");
    421     static_assert((std::is_same<decltype(std::pow((bool)0, (float)0)), double>::value), "");
    422     static_assert((std::is_same<decltype(std::pow((unsigned short)0, (double)0)), double>::value), "");
    423     static_assert((std::is_same<decltype(std::pow((int)0, (long double)0)), long double>::value), "");
    424     static_assert((std::is_same<decltype(std::pow((float)0, (unsigned int)0)), double>::value), "");
    425     static_assert((std::is_same<decltype(std::pow((double)0, (long)0)), double>::value), "");
    426     static_assert((std::is_same<decltype(std::pow((long double)0, (unsigned long)0)), long double>::value), "");
    427     static_assert((std::is_same<decltype(std::pow((int)0, (long long)0)), double>::value), "");
    428     static_assert((std::is_same<decltype(std::pow((int)0, (unsigned long long)0)), double>::value), "");
    429     static_assert((std::is_same<decltype(std::pow((double)0, (double)0)), double>::value), "");
    430     static_assert((std::is_same<decltype(std::pow((long double)0, (long double)0)), long double>::value), "");
    431     static_assert((std::is_same<decltype(std::pow((float)0, (double)0)), double>::value), "");
    432     static_assert((std::is_same<decltype(std::pow((float)0, (long double)0)), long double>::value), "");
    433     static_assert((std::is_same<decltype(std::pow((double)0, (long double)0)), long double>::value), "");
    434     static_assert((std::is_same<decltype(std::powf(0,0)), float>::value), "");
    435     static_assert((std::is_same<decltype(std::powl(0,0)), long double>::value), "");
    436     static_assert((std::is_same<decltype(std::pow((int)0, (int)0)), double>::value), "");
    437 //     static_assert((std::is_same<decltype(std::pow(Value<int>(), (int)0)), double>::value), "");
    438 //     static_assert((std::is_same<decltype(std::pow(Value<long double>(), (float)0)), long double>::value), "");
    439 //     static_assert((std::is_same<decltype(std::pow((float) 0, Value<float>())), float>::value), "");
    440     static_assert((std::is_same<decltype(pow(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    441     assert(std::pow(1,1) == 1);
    442 //     assert(std::pow(Value<int,1>(), Value<float,1>())  == 1);
    443 //     assert(std::pow(1.0f, Value<double,1>()) == 1);
    444 //     assert(std::pow(1.0, Value<int,1>()) == 1);
    445 //     assert(std::pow(Value<long double,1>(), 1LL) == 1);
    446 }
    447 
    448 void test_sin()
    449 {
    450     static_assert((std::is_same<decltype(std::sin((float)0)), float>::value), "");
    451     static_assert((std::is_same<decltype(std::sin((bool)0)), double>::value), "");
    452     static_assert((std::is_same<decltype(std::sin((unsigned short)0)), double>::value), "");
    453     static_assert((std::is_same<decltype(std::sin((int)0)), double>::value), "");
    454     static_assert((std::is_same<decltype(std::sin((unsigned int)0)), double>::value), "");
    455     static_assert((std::is_same<decltype(std::sin((long)0)), double>::value), "");
    456     static_assert((std::is_same<decltype(std::sin((unsigned long)0)), double>::value), "");
    457     static_assert((std::is_same<decltype(std::sin((long long)0)), double>::value), "");
    458     static_assert((std::is_same<decltype(std::sin((unsigned long long)0)), double>::value), "");
    459     static_assert((std::is_same<decltype(std::sin((double)0)), double>::value), "");
    460     static_assert((std::is_same<decltype(std::sin((long double)0)), long double>::value), "");
    461     static_assert((std::is_same<decltype(std::sinf(0)), float>::value), "");
    462     static_assert((std::is_same<decltype(std::sinl(0)), long double>::value), "");
    463     static_assert((std::is_same<decltype(sin(Ambiguous())), Ambiguous>::value), "");
    464     assert(std::sin(0) == 0);
    465 }
    466 
    467 void test_sinh()
    468 {
    469     static_assert((std::is_same<decltype(std::sinh((float)0)), float>::value), "");
    470     static_assert((std::is_same<decltype(std::sinh((bool)0)), double>::value), "");
    471     static_assert((std::is_same<decltype(std::sinh((unsigned short)0)), double>::value), "");
    472     static_assert((std::is_same<decltype(std::sinh((int)0)), double>::value), "");
    473     static_assert((std::is_same<decltype(std::sinh((unsigned int)0)), double>::value), "");
    474     static_assert((std::is_same<decltype(std::sinh((long)0)), double>::value), "");
    475     static_assert((std::is_same<decltype(std::sinh((unsigned long)0)), double>::value), "");
    476     static_assert((std::is_same<decltype(std::sinh((long long)0)), double>::value), "");
    477     static_assert((std::is_same<decltype(std::sinh((unsigned long long)0)), double>::value), "");
    478     static_assert((std::is_same<decltype(std::sinh((double)0)), double>::value), "");
    479     static_assert((std::is_same<decltype(std::sinh((long double)0)), long double>::value), "");
    480     static_assert((std::is_same<decltype(std::sinhf(0)), float>::value), "");
    481     static_assert((std::is_same<decltype(std::sinhl(0)), long double>::value), "");
    482     static_assert((std::is_same<decltype(sinh(Ambiguous())), Ambiguous>::value), "");
    483     assert(std::sinh(0) == 0);
    484 }
    485 
    486 void test_sqrt()
    487 {
    488     static_assert((std::is_same<decltype(std::sqrt((float)0)), float>::value), "");
    489     static_assert((std::is_same<decltype(std::sqrt((bool)0)), double>::value), "");
    490     static_assert((std::is_same<decltype(std::sqrt((unsigned short)0)), double>::value), "");
    491     static_assert((std::is_same<decltype(std::sqrt((int)0)), double>::value), "");
    492     static_assert((std::is_same<decltype(std::sqrt((unsigned int)0)), double>::value), "");
    493     static_assert((std::is_same<decltype(std::sqrt((long)0)), double>::value), "");
    494     static_assert((std::is_same<decltype(std::sqrt((unsigned long)0)), double>::value), "");
    495     static_assert((std::is_same<decltype(std::sqrt((long long)0)), double>::value), "");
    496     static_assert((std::is_same<decltype(std::sqrt((unsigned long long)0)), double>::value), "");
    497     static_assert((std::is_same<decltype(std::sqrt((double)0)), double>::value), "");
    498     static_assert((std::is_same<decltype(std::sqrt((long double)0)), long double>::value), "");
    499     static_assert((std::is_same<decltype(std::sqrtf(0)), float>::value), "");
    500     static_assert((std::is_same<decltype(std::sqrtl(0)), long double>::value), "");
    501     static_assert((std::is_same<decltype(sqrt(Ambiguous())), Ambiguous>::value), "");
    502     assert(std::sqrt(4) == 2);
    503 }
    504 
    505 void test_tan()
    506 {
    507     static_assert((std::is_same<decltype(std::tan((float)0)), float>::value), "");
    508     static_assert((std::is_same<decltype(std::tan((bool)0)), double>::value), "");
    509     static_assert((std::is_same<decltype(std::tan((unsigned short)0)), double>::value), "");
    510     static_assert((std::is_same<decltype(std::tan((int)0)), double>::value), "");
    511     static_assert((std::is_same<decltype(std::tan((unsigned int)0)), double>::value), "");
    512     static_assert((std::is_same<decltype(std::tan((long)0)), double>::value), "");
    513     static_assert((std::is_same<decltype(std::tan((unsigned long)0)), double>::value), "");
    514     static_assert((std::is_same<decltype(std::tan((long long)0)), double>::value), "");
    515     static_assert((std::is_same<decltype(std::tan((unsigned long long)0)), double>::value), "");
    516     static_assert((std::is_same<decltype(std::tan((double)0)), double>::value), "");
    517     static_assert((std::is_same<decltype(std::tan((long double)0)), long double>::value), "");
    518     static_assert((std::is_same<decltype(std::tanf(0)), float>::value), "");
    519     static_assert((std::is_same<decltype(std::tanl(0)), long double>::value), "");
    520     static_assert((std::is_same<decltype(tan(Ambiguous())), Ambiguous>::value), "");
    521     assert(std::tan(0) == 0);
    522 }
    523 
    524 void test_tanh()
    525 {
    526     static_assert((std::is_same<decltype(std::tanh((float)0)), float>::value), "");
    527     static_assert((std::is_same<decltype(std::tanh((bool)0)), double>::value), "");
    528     static_assert((std::is_same<decltype(std::tanh((unsigned short)0)), double>::value), "");
    529     static_assert((std::is_same<decltype(std::tanh((int)0)), double>::value), "");
    530     static_assert((std::is_same<decltype(std::tanh((unsigned int)0)), double>::value), "");
    531     static_assert((std::is_same<decltype(std::tanh((long)0)), double>::value), "");
    532     static_assert((std::is_same<decltype(std::tanh((unsigned long)0)), double>::value), "");
    533     static_assert((std::is_same<decltype(std::tanh((long long)0)), double>::value), "");
    534     static_assert((std::is_same<decltype(std::tanh((unsigned long long)0)), double>::value), "");
    535     static_assert((std::is_same<decltype(std::tanh((double)0)), double>::value), "");
    536     static_assert((std::is_same<decltype(std::tanh((long double)0)), long double>::value), "");
    537     static_assert((std::is_same<decltype(std::tanhf(0)), float>::value), "");
    538     static_assert((std::is_same<decltype(std::tanhl(0)), long double>::value), "");
    539     static_assert((std::is_same<decltype(tanh(Ambiguous())), Ambiguous>::value), "");
    540     assert(std::tanh(0) == 0);
    541 }
    542 
    543 void test_signbit()
    544 {
    545 #ifdef signbit
    546 #error signbit defined
    547 #endif
    548     static_assert((std::is_same<decltype(std::signbit((float)0)), bool>::value), "");
    549     static_assert((std::is_same<decltype(std::signbit((double)0)), bool>::value), "");
    550     static_assert((std::is_same<decltype(std::signbit(0)), bool>::value), "");
    551     static_assert((std::is_same<decltype(std::signbit((long double)0)), bool>::value), "");
    552     static_assert((std::is_same<decltype(signbit(Ambiguous())), Ambiguous>::value), "");
    553     assert(std::signbit(-1.0) == true);
    554 }
    555 
    556 void test_fpclassify()
    557 {
    558 #ifdef fpclassify
    559 #error fpclassify defined
    560 #endif
    561     static_assert((std::is_same<decltype(std::fpclassify((float)0)), int>::value), "");
    562     static_assert((std::is_same<decltype(std::fpclassify((double)0)), int>::value), "");
    563     static_assert((std::is_same<decltype(std::fpclassify(0)), int>::value), "");
    564     static_assert((std::is_same<decltype(std::fpclassify((long double)0)), int>::value), "");
    565     static_assert((std::is_same<decltype(fpclassify(Ambiguous())), Ambiguous>::value), "");
    566     assert(std::fpclassify(-1.0) == FP_NORMAL);
    567 }
    568 
    569 void test_isfinite()
    570 {
    571 #ifdef isfinite
    572 #error isfinite defined
    573 #endif
    574     static_assert((std::is_same<decltype(std::isfinite((float)0)), bool>::value), "");
    575     static_assert((std::is_same<decltype(std::isfinite((double)0)), bool>::value), "");
    576     static_assert((std::is_same<decltype(std::isfinite(0)), bool>::value), "");
    577     static_assert((std::is_same<decltype(std::isfinite((long double)0)), bool>::value), "");
    578     static_assert((std::is_same<decltype(isfinite(Ambiguous())), Ambiguous>::value), "");
    579     assert(std::isfinite(-1.0) == true);
    580 }
    581 
    582 void test_isnormal()
    583 {
    584 #ifdef isnormal
    585 #error isnormal defined
    586 #endif
    587     static_assert((std::is_same<decltype(std::isnormal((float)0)), bool>::value), "");
    588     static_assert((std::is_same<decltype(std::isnormal((double)0)), bool>::value), "");
    589     static_assert((std::is_same<decltype(std::isnormal(0)), bool>::value), "");
    590     static_assert((std::is_same<decltype(std::isnormal((long double)0)), bool>::value), "");
    591     static_assert((std::is_same<decltype(isnormal(Ambiguous())), Ambiguous>::value), "");
    592     assert(std::isnormal(-1.0) == true);
    593 }
    594 
    595 void test_isgreater()
    596 {
    597 #ifdef isgreater
    598 #error isgreater defined
    599 #endif
    600     static_assert((std::is_same<decltype(std::isgreater((float)0, (float)0)), bool>::value), "");
    601     static_assert((std::is_same<decltype(std::isgreater((float)0, (double)0)), bool>::value), "");
    602     static_assert((std::is_same<decltype(std::isgreater((float)0, (long double)0)), bool>::value), "");
    603     static_assert((std::is_same<decltype(std::isgreater((double)0, (float)0)), bool>::value), "");
    604     static_assert((std::is_same<decltype(std::isgreater((double)0, (double)0)), bool>::value), "");
    605     static_assert((std::is_same<decltype(std::isgreater(0, (double)0)), bool>::value), "");
    606     static_assert((std::is_same<decltype(std::isgreater((double)0, (long double)0)), bool>::value), "");
    607     static_assert((std::is_same<decltype(std::isgreater((long double)0, (float)0)), bool>::value), "");
    608     static_assert((std::is_same<decltype(std::isgreater((long double)0, (double)0)), bool>::value), "");
    609     static_assert((std::is_same<decltype(std::isgreater((long double)0, (long double)0)), bool>::value), "");
    610     static_assert((std::is_same<decltype(isgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    611     assert(std::isgreater(-1.0, 0.F) == false);
    612 }
    613 
    614 void test_isgreaterequal()
    615 {
    616 #ifdef isgreaterequal
    617 #error isgreaterequal defined
    618 #endif
    619     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (float)0)), bool>::value), "");
    620     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (double)0)), bool>::value), "");
    621     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (long double)0)), bool>::value), "");
    622     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (float)0)), bool>::value), "");
    623     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (double)0)), bool>::value), "");
    624     static_assert((std::is_same<decltype(std::isgreaterequal(0, (double)0)), bool>::value), "");
    625     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (long double)0)), bool>::value), "");
    626     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (float)0)), bool>::value), "");
    627     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (double)0)), bool>::value), "");
    628     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (long double)0)), bool>::value), "");
    629     static_assert((std::is_same<decltype(isgreaterequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    630     assert(std::isgreaterequal(-1.0, 0.F) == false);
    631 }
    632 
    633 void test_isinf()
    634 {
    635 #ifdef isinf
    636 #error isinf defined
    637 #endif
    638     static_assert((std::is_same<decltype(std::isinf((float)0)), bool>::value), "");
    639 
    640     typedef decltype(std::isinf((double)0)) DoubleRetType;
    641 #ifndef __linux__
    642     static_assert((std::is_same<DoubleRetType, bool>::value), "");
    643 #else
    644     // GLIBC < 2.26 defines 'isinf(double)' with a return type of 'int' in
    645     // all C++ dialects. The test should tolerate this.
    646     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
    647     static_assert((std::is_same<DoubleRetType, bool>::value
    648                 || std::is_same<DoubleRetType, int>::value), "");
    649 #endif
    650 
    651     static_assert((std::is_same<decltype(std::isinf(0)), bool>::value), "");
    652     static_assert((std::is_same<decltype(std::isinf((long double)0)), bool>::value), "");
    653     assert(std::isinf(-1.0) == false);
    654 }
    655 
    656 void test_isless()
    657 {
    658 #ifdef isless
    659 #error isless defined
    660 #endif
    661     static_assert((std::is_same<decltype(std::isless((float)0, (float)0)), bool>::value), "");
    662     static_assert((std::is_same<decltype(std::isless((float)0, (double)0)), bool>::value), "");
    663     static_assert((std::is_same<decltype(std::isless((float)0, (long double)0)), bool>::value), "");
    664     static_assert((std::is_same<decltype(std::isless((double)0, (float)0)), bool>::value), "");
    665     static_assert((std::is_same<decltype(std::isless((double)0, (double)0)), bool>::value), "");
    666     static_assert((std::is_same<decltype(std::isless(0, (double)0)), bool>::value), "");
    667     static_assert((std::is_same<decltype(std::isless((double)0, (long double)0)), bool>::value), "");
    668     static_assert((std::is_same<decltype(std::isless((long double)0, (float)0)), bool>::value), "");
    669     static_assert((std::is_same<decltype(std::isless((long double)0, (double)0)), bool>::value), "");
    670     static_assert((std::is_same<decltype(std::isless((long double)0, (long double)0)), bool>::value), "");
    671     static_assert((std::is_same<decltype(isless(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    672     assert(std::isless(-1.0, 0.F) == true);
    673 }
    674 
    675 void test_islessequal()
    676 {
    677 #ifdef islessequal
    678 #error islessequal defined
    679 #endif
    680     static_assert((std::is_same<decltype(std::islessequal((float)0, (float)0)), bool>::value), "");
    681     static_assert((std::is_same<decltype(std::islessequal((float)0, (double)0)), bool>::value), "");
    682     static_assert((std::is_same<decltype(std::islessequal((float)0, (long double)0)), bool>::value), "");
    683     static_assert((std::is_same<decltype(std::islessequal((double)0, (float)0)), bool>::value), "");
    684     static_assert((std::is_same<decltype(std::islessequal((double)0, (double)0)), bool>::value), "");
    685     static_assert((std::is_same<decltype(std::islessequal(0, (double)0)), bool>::value), "");
    686     static_assert((std::is_same<decltype(std::islessequal((double)0, (long double)0)), bool>::value), "");
    687     static_assert((std::is_same<decltype(std::islessequal((long double)0, (float)0)), bool>::value), "");
    688     static_assert((std::is_same<decltype(std::islessequal((long double)0, (double)0)), bool>::value), "");
    689     static_assert((std::is_same<decltype(std::islessequal((long double)0, (long double)0)), bool>::value), "");
    690     static_assert((std::is_same<decltype(islessequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    691     assert(std::islessequal(-1.0, 0.F) == true);
    692 }
    693 
    694 void test_islessgreater()
    695 {
    696 #ifdef islessgreater
    697 #error islessgreater defined
    698 #endif
    699     static_assert((std::is_same<decltype(std::islessgreater((float)0, (float)0)), bool>::value), "");
    700     static_assert((std::is_same<decltype(std::islessgreater((float)0, (double)0)), bool>::value), "");
    701     static_assert((std::is_same<decltype(std::islessgreater((float)0, (long double)0)), bool>::value), "");
    702     static_assert((std::is_same<decltype(std::islessgreater((double)0, (float)0)), bool>::value), "");
    703     static_assert((std::is_same<decltype(std::islessgreater((double)0, (double)0)), bool>::value), "");
    704     static_assert((std::is_same<decltype(std::islessgreater(0, (double)0)), bool>::value), "");
    705     static_assert((std::is_same<decltype(std::islessgreater((double)0, (long double)0)), bool>::value), "");
    706     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (float)0)), bool>::value), "");
    707     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (double)0)), bool>::value), "");
    708     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (long double)0)), bool>::value), "");
    709     static_assert((std::is_same<decltype(islessgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    710     assert(std::islessgreater(-1.0, 0.F) == true);
    711 }
    712 
    713 void test_isnan()
    714 {
    715 #ifdef isnan
    716 #error isnan defined
    717 #endif
    718     static_assert((std::is_same<decltype(std::isnan((float)0)), bool>::value), "");
    719 
    720     typedef decltype(std::isnan((double)0)) DoubleRetType;
    721 #ifndef __linux__
    722     static_assert((std::is_same<DoubleRetType, bool>::value), "");
    723 #else
    724     // GLIBC < 2.26 defines 'isnan(double)' with a return type of 'int' in
    725     // all C++ dialects. The test should tolerate this.
    726     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
    727     static_assert((std::is_same<DoubleRetType, bool>::value
    728                 || std::is_same<DoubleRetType, int>::value), "");
    729 #endif
    730 
    731     static_assert((std::is_same<decltype(std::isnan(0)), bool>::value), "");
    732     static_assert((std::is_same<decltype(std::isnan((long double)0)), bool>::value), "");
    733     assert(std::isnan(-1.0) == false);
    734 }
    735 
    736 void test_isunordered()
    737 {
    738 #ifdef isunordered
    739 #error isunordered defined
    740 #endif
    741     static_assert((std::is_same<decltype(std::isunordered((float)0, (float)0)), bool>::value), "");
    742     static_assert((std::is_same<decltype(std::isunordered((float)0, (double)0)), bool>::value), "");
    743     static_assert((std::is_same<decltype(std::isunordered((float)0, (long double)0)), bool>::value), "");
    744     static_assert((std::is_same<decltype(std::isunordered((double)0, (float)0)), bool>::value), "");
    745     static_assert((std::is_same<decltype(std::isunordered((double)0, (double)0)), bool>::value), "");
    746     static_assert((std::is_same<decltype(std::isunordered(0, (double)0)), bool>::value), "");
    747     static_assert((std::is_same<decltype(std::isunordered((double)0, (long double)0)), bool>::value), "");
    748     static_assert((std::is_same<decltype(std::isunordered((long double)0, (float)0)), bool>::value), "");
    749     static_assert((std::is_same<decltype(std::isunordered((long double)0, (double)0)), bool>::value), "");
    750     static_assert((std::is_same<decltype(std::isunordered((long double)0, (long double)0)), bool>::value), "");
    751     static_assert((std::is_same<decltype(isunordered(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    752     assert(std::isunordered(-1.0, 0.F) == false);
    753 }
    754 
    755 void test_acosh()
    756 {
    757     static_assert((std::is_same<decltype(std::acosh((float)0)), float>::value), "");
    758     static_assert((std::is_same<decltype(std::acosh((bool)0)), double>::value), "");
    759     static_assert((std::is_same<decltype(std::acosh((unsigned short)0)), double>::value), "");
    760     static_assert((std::is_same<decltype(std::acosh((int)0)), double>::value), "");
    761     static_assert((std::is_same<decltype(std::acosh((unsigned int)0)), double>::value), "");
    762     static_assert((std::is_same<decltype(std::acosh((long)0)), double>::value), "");
    763     static_assert((std::is_same<decltype(std::acosh((unsigned long)0)), double>::value), "");
    764     static_assert((std::is_same<decltype(std::acosh((long long)0)), double>::value), "");
    765     static_assert((std::is_same<decltype(std::acosh((unsigned long long)0)), double>::value), "");
    766     static_assert((std::is_same<decltype(std::acosh((double)0)), double>::value), "");
    767     static_assert((std::is_same<decltype(std::acosh((long double)0)), long double>::value), "");
    768     static_assert((std::is_same<decltype(std::acoshf(0)), float>::value), "");
    769     static_assert((std::is_same<decltype(std::acoshl(0)), long double>::value), "");
    770     static_assert((std::is_same<decltype(acosh(Ambiguous())), Ambiguous>::value), "");
    771     assert(std::acosh(1) == 0);
    772 }
    773 
    774 void test_asinh()
    775 {
    776     static_assert((std::is_same<decltype(std::asinh((float)0)), float>::value), "");
    777     static_assert((std::is_same<decltype(std::asinh((bool)0)), double>::value), "");
    778     static_assert((std::is_same<decltype(std::asinh((unsigned short)0)), double>::value), "");
    779     static_assert((std::is_same<decltype(std::asinh((int)0)), double>::value), "");
    780     static_assert((std::is_same<decltype(std::asinh((unsigned int)0)), double>::value), "");
    781     static_assert((std::is_same<decltype(std::asinh((long)0)), double>::value), "");
    782     static_assert((std::is_same<decltype(std::asinh((unsigned long)0)), double>::value), "");
    783     static_assert((std::is_same<decltype(std::asinh((long long)0)), double>::value), "");
    784     static_assert((std::is_same<decltype(std::asinh((unsigned long long)0)), double>::value), "");
    785     static_assert((std::is_same<decltype(std::asinh((double)0)), double>::value), "");
    786     static_assert((std::is_same<decltype(std::asinh((long double)0)), long double>::value), "");
    787     static_assert((std::is_same<decltype(std::asinhf(0)), float>::value), "");
    788     static_assert((std::is_same<decltype(std::asinhl(0)), long double>::value), "");
    789     static_assert((std::is_same<decltype(asinh(Ambiguous())), Ambiguous>::value), "");
    790     assert(std::asinh(0) == 0);
    791 }
    792 
    793 void test_atanh()
    794 {
    795     static_assert((std::is_same<decltype(std::atanh((float)0)), float>::value), "");
    796     static_assert((std::is_same<decltype(std::atanh((bool)0)), double>::value), "");
    797     static_assert((std::is_same<decltype(std::atanh((unsigned short)0)), double>::value), "");
    798     static_assert((std::is_same<decltype(std::atanh((int)0)), double>::value), "");
    799     static_assert((std::is_same<decltype(std::atanh((unsigned int)0)), double>::value), "");
    800     static_assert((std::is_same<decltype(std::atanh((long)0)), double>::value), "");
    801     static_assert((std::is_same<decltype(std::atanh((unsigned long)0)), double>::value), "");
    802     static_assert((std::is_same<decltype(std::atanh((long long)0)), double>::value), "");
    803     static_assert((std::is_same<decltype(std::atanh((unsigned long long)0)), double>::value), "");
    804     static_assert((std::is_same<decltype(std::atanh((double)0)), double>::value), "");
    805     static_assert((std::is_same<decltype(std::atanh((long double)0)), long double>::value), "");
    806     static_assert((std::is_same<decltype(std::atanhf(0)), float>::value), "");
    807     static_assert((std::is_same<decltype(std::atanhl(0)), long double>::value), "");
    808     static_assert((std::is_same<decltype(atanh(Ambiguous())), Ambiguous>::value), "");
    809     assert(std::atanh(0) == 0);
    810 }
    811 
    812 void test_cbrt()
    813 {
    814     static_assert((std::is_same<decltype(std::cbrt((float)0)), float>::value), "");
    815     static_assert((std::is_same<decltype(std::cbrt((bool)0)), double>::value), "");
    816     static_assert((std::is_same<decltype(std::cbrt((unsigned short)0)), double>::value), "");
    817     static_assert((std::is_same<decltype(std::cbrt((int)0)), double>::value), "");
    818     static_assert((std::is_same<decltype(std::cbrt((unsigned int)0)), double>::value), "");
    819     static_assert((std::is_same<decltype(std::cbrt((long)0)), double>::value), "");
    820     static_assert((std::is_same<decltype(std::cbrt((unsigned long)0)), double>::value), "");
    821     static_assert((std::is_same<decltype(std::cbrt((long long)0)), double>::value), "");
    822     static_assert((std::is_same<decltype(std::cbrt((unsigned long long)0)), double>::value), "");
    823     static_assert((std::is_same<decltype(std::cbrt((double)0)), double>::value), "");
    824     static_assert((std::is_same<decltype(std::cbrt((long double)0)), long double>::value), "");
    825     static_assert((std::is_same<decltype(std::cbrtf(0)), float>::value), "");
    826     static_assert((std::is_same<decltype(std::cbrtl(0)), long double>::value), "");
    827     static_assert((std::is_same<decltype(cbrt(Ambiguous())), Ambiguous>::value), "");
    828     assert(std::cbrt(1) == 1);
    829 }
    830 
    831 void test_copysign()
    832 {
    833     static_assert((std::is_same<decltype(std::copysign((float)0, (float)0)), float>::value), "");
    834     static_assert((std::is_same<decltype(std::copysign((bool)0, (float)0)), double>::value), "");
    835     static_assert((std::is_same<decltype(std::copysign((unsigned short)0, (double)0)), double>::value), "");
    836     static_assert((std::is_same<decltype(std::copysign((int)0, (long double)0)), long double>::value), "");
    837     static_assert((std::is_same<decltype(std::copysign((float)0, (unsigned int)0)), double>::value), "");
    838     static_assert((std::is_same<decltype(std::copysign((double)0, (long)0)), double>::value), "");
    839     static_assert((std::is_same<decltype(std::copysign((long double)0, (unsigned long)0)), long double>::value), "");
    840     static_assert((std::is_same<decltype(std::copysign((int)0, (long long)0)), double>::value), "");
    841     static_assert((std::is_same<decltype(std::copysign((int)0, (unsigned long long)0)), double>::value), "");
    842     static_assert((std::is_same<decltype(std::copysign((double)0, (double)0)), double>::value), "");
    843     static_assert((std::is_same<decltype(std::copysign((long double)0, (long double)0)), long double>::value), "");
    844     static_assert((std::is_same<decltype(std::copysign((float)0, (double)0)), double>::value), "");
    845     static_assert((std::is_same<decltype(std::copysign((float)0, (long double)0)), long double>::value), "");
    846     static_assert((std::is_same<decltype(std::copysign((double)0, (long double)0)), long double>::value), "");
    847     static_assert((std::is_same<decltype(std::copysignf(0,0)), float>::value), "");
    848     static_assert((std::is_same<decltype(std::copysignl(0,0)), long double>::value), "");
    849     static_assert((std::is_same<decltype(std::copysign((int)0, (int)0)), double>::value), "");
    850     static_assert((std::is_same<decltype(copysign(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    851     assert(std::copysign(1,1) == 1);
    852 }
    853 
    854 void test_erf()
    855 {
    856     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");
    857     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");
    858     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");
    859     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");
    860     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");
    861     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");
    862     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");
    863     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");
    864     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");
    865     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");
    866     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");
    867     static_assert((std::is_same<decltype(std::erff(0)), float>::value), "");
    868     static_assert((std::is_same<decltype(std::erfl(0)), long double>::value), "");
    869     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");
    870     assert(std::erf(0) == 0);
    871 }
    872 
    873 void test_erfc()
    874 {
    875     static_assert((std::is_same<decltype(std::erfc((float)0)), float>::value), "");
    876     static_assert((std::is_same<decltype(std::erfc((bool)0)), double>::value), "");
    877     static_assert((std::is_same<decltype(std::erfc((unsigned short)0)), double>::value), "");
    878     static_assert((std::is_same<decltype(std::erfc((int)0)), double>::value), "");
    879     static_assert((std::is_same<decltype(std::erfc((unsigned int)0)), double>::value), "");
    880     static_assert((std::is_same<decltype(std::erfc((long)0)), double>::value), "");
    881     static_assert((std::is_same<decltype(std::erfc((unsigned long)0)), double>::value), "");
    882     static_assert((std::is_same<decltype(std::erfc((long long)0)), double>::value), "");
    883     static_assert((std::is_same<decltype(std::erfc((unsigned long long)0)), double>::value), "");
    884     static_assert((std::is_same<decltype(std::erfc((double)0)), double>::value), "");
    885     static_assert((std::is_same<decltype(std::erfc((long double)0)), long double>::value), "");
    886     static_assert((std::is_same<decltype(std::erfcf(0)), float>::value), "");
    887     static_assert((std::is_same<decltype(std::erfcl(0)), long double>::value), "");
    888     static_assert((std::is_same<decltype(erfc(Ambiguous())), Ambiguous>::value), "");
    889     assert(std::erfc(0) == 1);
    890 }
    891 
    892 void test_exp2()
    893 {
    894     static_assert((std::is_same<decltype(std::exp2((float)0)), float>::value), "");
    895     static_assert((std::is_same<decltype(std::exp2((bool)0)), double>::value), "");
    896     static_assert((std::is_same<decltype(std::exp2((unsigned short)0)), double>::value), "");
    897     static_assert((std::is_same<decltype(std::exp2((int)0)), double>::value), "");
    898     static_assert((std::is_same<decltype(std::exp2((unsigned int)0)), double>::value), "");
    899     static_assert((std::is_same<decltype(std::exp2((long)0)), double>::value), "");
    900     static_assert((std::is_same<decltype(std::exp2((unsigned long)0)), double>::value), "");
    901     static_assert((std::is_same<decltype(std::exp2((long long)0)), double>::value), "");
    902     static_assert((std::is_same<decltype(std::exp2((unsigned long long)0)), double>::value), "");
    903     static_assert((std::is_same<decltype(std::exp2((double)0)), double>::value), "");
    904     static_assert((std::is_same<decltype(std::exp2((long double)0)), long double>::value), "");
    905     static_assert((std::is_same<decltype(std::exp2f(0)), float>::value), "");
    906     static_assert((std::is_same<decltype(std::exp2l(0)), long double>::value), "");
    907     static_assert((std::is_same<decltype(exp2(Ambiguous())), Ambiguous>::value), "");
    908     assert(std::exp2(1) == 2);
    909 }
    910 
    911 void test_expm1()
    912 {
    913     static_assert((std::is_same<decltype(std::expm1((float)0)), float>::value), "");
    914     static_assert((std::is_same<decltype(std::expm1((bool)0)), double>::value), "");
    915     static_assert((std::is_same<decltype(std::expm1((unsigned short)0)), double>::value), "");
    916     static_assert((std::is_same<decltype(std::expm1((int)0)), double>::value), "");
    917     static_assert((std::is_same<decltype(std::expm1((unsigned int)0)), double>::value), "");
    918     static_assert((std::is_same<decltype(std::expm1((long)0)), double>::value), "");
    919     static_assert((std::is_same<decltype(std::expm1((unsigned long)0)), double>::value), "");
    920     static_assert((std::is_same<decltype(std::expm1((long long)0)), double>::value), "");
    921     static_assert((std::is_same<decltype(std::expm1((unsigned long long)0)), double>::value), "");
    922     static_assert((std::is_same<decltype(std::expm1((double)0)), double>::value), "");
    923     static_assert((std::is_same<decltype(std::expm1((long double)0)), long double>::value), "");
    924     static_assert((std::is_same<decltype(std::expm1f(0)), float>::value), "");
    925     static_assert((std::is_same<decltype(std::expm1l(0)), long double>::value), "");
    926     static_assert((std::is_same<decltype(expm1(Ambiguous())), Ambiguous>::value), "");
    927     assert(std::expm1(0) == 0);
    928 }
    929 
    930 void test_fdim()
    931 {
    932     static_assert((std::is_same<decltype(std::fdim((float)0, (float)0)), float>::value), "");
    933     static_assert((std::is_same<decltype(std::fdim((bool)0, (float)0)), double>::value), "");
    934     static_assert((std::is_same<decltype(std::fdim((unsigned short)0, (double)0)), double>::value), "");
    935     static_assert((std::is_same<decltype(std::fdim((int)0, (long double)0)), long double>::value), "");
    936     static_assert((std::is_same<decltype(std::fdim((float)0, (unsigned int)0)), double>::value), "");
    937     static_assert((std::is_same<decltype(std::fdim((double)0, (long)0)), double>::value), "");
    938     static_assert((std::is_same<decltype(std::fdim((long double)0, (unsigned long)0)), long double>::value), "");
    939     static_assert((std::is_same<decltype(std::fdim((int)0, (long long)0)), double>::value), "");
    940     static_assert((std::is_same<decltype(std::fdim((int)0, (unsigned long long)0)), double>::value), "");
    941     static_assert((std::is_same<decltype(std::fdim((double)0, (double)0)), double>::value), "");
    942     static_assert((std::is_same<decltype(std::fdim((long double)0, (long double)0)), long double>::value), "");
    943     static_assert((std::is_same<decltype(std::fdim((float)0, (double)0)), double>::value), "");
    944     static_assert((std::is_same<decltype(std::fdim((float)0, (long double)0)), long double>::value), "");
    945     static_assert((std::is_same<decltype(std::fdim((double)0, (long double)0)), long double>::value), "");
    946     static_assert((std::is_same<decltype(std::fdimf(0,0)), float>::value), "");
    947     static_assert((std::is_same<decltype(std::fdiml(0,0)), long double>::value), "");
    948     static_assert((std::is_same<decltype(std::fdim((int)0, (int)0)), double>::value), "");
    949     static_assert((std::is_same<decltype(fdim(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    950     assert(std::fdim(1,0) == 1);
    951 }
    952 
    953 void test_fma()
    954 {
    955     static_assert((std::is_same<decltype(std::fma((bool)0, (float)0, (float)0)), double>::value), "");
    956     static_assert((std::is_same<decltype(std::fma((char)0, (float)0, (float)0)), double>::value), "");
    957     static_assert((std::is_same<decltype(std::fma((unsigned)0, (float)0, (float)0)), double>::value), "");
    958     static_assert((std::is_same<decltype(std::fma((float)0, (int)0, (float)0)), double>::value), "");
    959     static_assert((std::is_same<decltype(std::fma((float)0, (long)0, (float)0)), double>::value), "");
    960     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (unsigned long long)0)), double>::value), "");
    961     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (double)0)), double>::value), "");
    962     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (long double)0)), long double>::value), "");
    963     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (float)0)), float>::value), "");
    964 
    965     static_assert((std::is_same<decltype(std::fma((bool)0, (double)0, (double)0)), double>::value), "");
    966     static_assert((std::is_same<decltype(std::fma((char)0, (double)0, (double)0)), double>::value), "");
    967     static_assert((std::is_same<decltype(std::fma((unsigned)0, (double)0, (double)0)), double>::value), "");
    968     static_assert((std::is_same<decltype(std::fma((double)0, (int)0, (double)0)), double>::value), "");
    969     static_assert((std::is_same<decltype(std::fma((double)0, (long)0, (double)0)), double>::value), "");
    970     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (unsigned long long)0)), double>::value), "");
    971     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (float)0)), double>::value), "");
    972     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (long double)0)), long double>::value), "");
    973     static_assert((std::is_same<decltype(std::fma((double)0, (double)0,  (double)0)), double>::value), "");
    974 
    975     static_assert((std::is_same<decltype(std::fma((bool)0, (long double)0, (long double)0)), long double>::value), "");
    976     static_assert((std::is_same<decltype(std::fma((char)0, (long double)0, (long double)0)), long double>::value), "");
    977     static_assert((std::is_same<decltype(std::fma((unsigned)0, (long double)0, (long double)0)), long double>::value), "");
    978     static_assert((std::is_same<decltype(std::fma((long double)0, (int)0, (long double)0)), long double>::value), "");
    979     static_assert((std::is_same<decltype(std::fma((long double)0, (long)0, (long double)0)), long double>::value), "");
    980     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (unsigned long long)0)), long double>::value), "");
    981     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (float)0)), long double>::value), "");
    982     static_assert((std::is_same<decltype(std::fma((double)0, (long double)0, (long double)0)), long double>::value), "");
    983     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (long double)0)), long double>::value), "");
    984 
    985     static_assert((std::is_same<decltype(std::fmaf(0,0,0)), float>::value), "");
    986     static_assert((std::is_same<decltype(std::fmal(0,0,0)), long double>::value), "");
    987     static_assert((std::is_same<decltype(fma(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
    988     assert(std::fma(1,1,1) == 2);
    989 }
    990 
    991 void test_fmax()
    992 {
    993     static_assert((std::is_same<decltype(std::fmax((float)0, (float)0)), float>::value), "");
    994     static_assert((std::is_same<decltype(std::fmax((bool)0, (float)0)), double>::value), "");
    995     static_assert((std::is_same<decltype(std::fmax((unsigned short)0, (double)0)), double>::value), "");
    996     static_assert((std::is_same<decltype(std::fmax((int)0, (long double)0)), long double>::value), "");
    997     static_assert((std::is_same<decltype(std::fmax((float)0, (unsigned int)0)), double>::value), "");
    998     static_assert((std::is_same<decltype(std::fmax((double)0, (long)0)), double>::value), "");
    999     static_assert((std::is_same<decltype(std::fmax((long double)0, (unsigned long)0)), long double>::value), "");
   1000     static_assert((std::is_same<decltype(std::fmax((int)0, (long long)0)), double>::value), "");
   1001     static_assert((std::is_same<decltype(std::fmax((int)0, (unsigned long long)0)), double>::value), "");
   1002     static_assert((std::is_same<decltype(std::fmax((double)0, (double)0)), double>::value), "");
   1003     static_assert((std::is_same<decltype(std::fmax((long double)0, (long double)0)), long double>::value), "");
   1004     static_assert((std::is_same<decltype(std::fmax((float)0, (double)0)), double>::value), "");
   1005     static_assert((std::is_same<decltype(std::fmax((float)0, (long double)0)), long double>::value), "");
   1006     static_assert((std::is_same<decltype(std::fmax((double)0, (long double)0)), long double>::value), "");
   1007     static_assert((std::is_same<decltype(std::fmaxf(0,0)), float>::value), "");
   1008     static_assert((std::is_same<decltype(std::fmaxl(0,0)), long double>::value), "");
   1009     static_assert((std::is_same<decltype(std::fmax((int)0, (int)0)), double>::value), "");
   1010     static_assert((std::is_same<decltype(fmax(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1011     assert(std::fmax(1,0) == 1);
   1012 }
   1013 
   1014 void test_fmin()
   1015 {
   1016     static_assert((std::is_same<decltype(std::fmin((float)0, (float)0)), float>::value), "");
   1017     static_assert((std::is_same<decltype(std::fmin((bool)0, (float)0)), double>::value), "");
   1018     static_assert((std::is_same<decltype(std::fmin((unsigned short)0, (double)0)), double>::value), "");
   1019     static_assert((std::is_same<decltype(std::fmin((int)0, (long double)0)), long double>::value), "");
   1020     static_assert((std::is_same<decltype(std::fmin((float)0, (unsigned int)0)), double>::value), "");
   1021     static_assert((std::is_same<decltype(std::fmin((double)0, (long)0)), double>::value), "");
   1022     static_assert((std::is_same<decltype(std::fmin((long double)0, (unsigned long)0)), long double>::value), "");
   1023     static_assert((std::is_same<decltype(std::fmin((int)0, (long long)0)), double>::value), "");
   1024     static_assert((std::is_same<decltype(std::fmin((int)0, (unsigned long long)0)), double>::value), "");
   1025     static_assert((std::is_same<decltype(std::fmin((double)0, (double)0)), double>::value), "");
   1026     static_assert((std::is_same<decltype(std::fmin((long double)0, (long double)0)), long double>::value), "");
   1027     static_assert((std::is_same<decltype(std::fmin((float)0, (double)0)), double>::value), "");
   1028     static_assert((std::is_same<decltype(std::fmin((float)0, (long double)0)), long double>::value), "");
   1029     static_assert((std::is_same<decltype(std::fmin((double)0, (long double)0)), long double>::value), "");
   1030     static_assert((std::is_same<decltype(std::fminf(0,0)), float>::value), "");
   1031     static_assert((std::is_same<decltype(std::fminl(0,0)), long double>::value), "");
   1032     static_assert((std::is_same<decltype(std::fmin((int)0, (int)0)), double>::value), "");
   1033     static_assert((std::is_same<decltype(fmin(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1034     assert(std::fmin(1,0) == 0);
   1035 }
   1036 
   1037 void test_hypot()
   1038 {
   1039     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0)), float>::value), "");
   1040     static_assert((std::is_same<decltype(std::hypot((bool)0, (float)0)), double>::value), "");
   1041     static_assert((std::is_same<decltype(std::hypot((unsigned short)0, (double)0)), double>::value), "");
   1042     static_assert((std::is_same<decltype(std::hypot((int)0, (long double)0)), long double>::value), "");
   1043     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned int)0)), double>::value), "");
   1044     static_assert((std::is_same<decltype(std::hypot((double)0, (long)0)), double>::value), "");
   1045     static_assert((std::is_same<decltype(std::hypot((long double)0, (unsigned long)0)), long double>::value), "");
   1046     static_assert((std::is_same<decltype(std::hypot((int)0, (long long)0)), double>::value), "");
   1047     static_assert((std::is_same<decltype(std::hypot((int)0, (unsigned long long)0)), double>::value), "");
   1048     static_assert((std::is_same<decltype(std::hypot((double)0, (double)0)), double>::value), "");
   1049     static_assert((std::is_same<decltype(std::hypot((long double)0, (long double)0)), long double>::value), "");
   1050     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0)), double>::value), "");
   1051     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0)), long double>::value), "");
   1052     static_assert((std::is_same<decltype(std::hypot((double)0, (long double)0)), long double>::value), "");
   1053     static_assert((std::is_same<decltype(std::hypotf(0,0)), float>::value), "");
   1054     static_assert((std::is_same<decltype(std::hypotl(0,0)), long double>::value), "");
   1055     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0)), double>::value), "");
   1056     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1057     assert(std::hypot(3,4) == 5);
   1058 
   1059 #if TEST_STD_VER > 14
   1060     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (float)0)), float>::value), "");
   1061     static_assert((std::is_same<decltype(std::hypot((float)0, (bool)0, (float)0)), double>::value), "");
   1062     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned short)0, (double)0)), double>::value), "");
   1063     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long double)0)), long double>::value), "");
   1064     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned int)0)), double>::value), "");
   1065     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long)0)), double>::value), "");
   1066     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
   1067     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long long)0)), double>::value), "");
   1068     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (unsigned long long)0)), double>::value), "");
   1069     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (double)0)), double>::value), "");
   1070     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (long double)0)), long double>::value), "");
   1071     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (double)0)), double>::value), "");
   1072     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (long double)0)), long double>::value), "");
   1073     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long double)0)), long double>::value), "");
   1074     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0, (int)0)), double>::value), "");
   1075     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1076 
   1077     assert(std::hypot(2,3,6) == 7);
   1078     assert(std::hypot(1,4,8) == 9);
   1079 #endif
   1080 }
   1081 
   1082 void test_ilogb()
   1083 {
   1084     static_assert((std::is_same<decltype(std::ilogb((float)0)), int>::value), "");
   1085     static_assert((std::is_same<decltype(std::ilogb((bool)0)), int>::value), "");
   1086     static_assert((std::is_same<decltype(std::ilogb((unsigned short)0)), int>::value), "");
   1087     static_assert((std::is_same<decltype(std::ilogb((int)0)), int>::value), "");
   1088     static_assert((std::is_same<decltype(std::ilogb((unsigned int)0)), int>::value), "");
   1089     static_assert((std::is_same<decltype(std::ilogb((long)0)), int>::value), "");
   1090     static_assert((std::is_same<decltype(std::ilogb((unsigned long)0)), int>::value), "");
   1091     static_assert((std::is_same<decltype(std::ilogb((long long)0)), int>::value), "");
   1092     static_assert((std::is_same<decltype(std::ilogb((unsigned long long)0)), int>::value), "");
   1093     static_assert((std::is_same<decltype(std::ilogb((double)0)), int>::value), "");
   1094     static_assert((std::is_same<decltype(std::ilogb((long double)0)), int>::value), "");
   1095     static_assert((std::is_same<decltype(std::ilogbf(0)), int>::value), "");
   1096     static_assert((std::is_same<decltype(std::ilogbl(0)), int>::value), "");
   1097     static_assert((std::is_same<decltype(ilogb(Ambiguous())), Ambiguous>::value), "");
   1098     assert(std::ilogb(1) == 0);
   1099 }
   1100 
   1101 void test_lgamma()
   1102 {
   1103     static_assert((std::is_same<decltype(std::lgamma((float)0)), float>::value), "");
   1104     static_assert((std::is_same<decltype(std::lgamma((bool)0)), double>::value), "");
   1105     static_assert((std::is_same<decltype(std::lgamma((unsigned short)0)), double>::value), "");
   1106     static_assert((std::is_same<decltype(std::lgamma((int)0)), double>::value), "");
   1107     static_assert((std::is_same<decltype(std::lgamma((unsigned int)0)), double>::value), "");
   1108     static_assert((std::is_same<decltype(std::lgamma((long)0)), double>::value), "");
   1109     static_assert((std::is_same<decltype(std::lgamma((unsigned long)0)), double>::value), "");
   1110     static_assert((std::is_same<decltype(std::lgamma((long long)0)), double>::value), "");
   1111     static_assert((std::is_same<decltype(std::lgamma((unsigned long long)0)), double>::value), "");
   1112     static_assert((std::is_same<decltype(std::lgamma((double)0)), double>::value), "");
   1113     static_assert((std::is_same<decltype(std::lgamma((long double)0)), long double>::value), "");
   1114     static_assert((std::is_same<decltype(std::lgammaf(0)), float>::value), "");
   1115     static_assert((std::is_same<decltype(std::lgammal(0)), long double>::value), "");
   1116     static_assert((std::is_same<decltype(lgamma(Ambiguous())), Ambiguous>::value), "");
   1117     assert(std::lgamma(1) == 0);
   1118 }
   1119 
   1120 void test_llrint()
   1121 {
   1122     static_assert((std::is_same<decltype(std::llrint((float)0)), long long>::value), "");
   1123     static_assert((std::is_same<decltype(std::llrint((bool)0)), long long>::value), "");
   1124     static_assert((std::is_same<decltype(std::llrint((unsigned short)0)), long long>::value), "");
   1125     static_assert((std::is_same<decltype(std::llrint((int)0)), long long>::value), "");
   1126     static_assert((std::is_same<decltype(std::llrint((unsigned int)0)), long long>::value), "");
   1127     static_assert((std::is_same<decltype(std::llrint((long)0)), long long>::value), "");
   1128     static_assert((std::is_same<decltype(std::llrint((unsigned long)0)), long long>::value), "");
   1129     static_assert((std::is_same<decltype(std::llrint((long long)0)), long long>::value), "");
   1130     static_assert((std::is_same<decltype(std::llrint((unsigned long long)0)), long long>::value), "");
   1131     static_assert((std::is_same<decltype(std::llrint((double)0)), long long>::value), "");
   1132     static_assert((std::is_same<decltype(std::llrint((long double)0)), long long>::value), "");
   1133     static_assert((std::is_same<decltype(std::llrintf(0)), long long>::value), "");
   1134     static_assert((std::is_same<decltype(std::llrintl(0)), long long>::value), "");
   1135     static_assert((std::is_same<decltype(llrint(Ambiguous())), Ambiguous>::value), "");
   1136     assert(std::llrint(1) == 1LL);
   1137 }
   1138 
   1139 void test_llround()
   1140 {
   1141     static_assert((std::is_same<decltype(std::llround((float)0)), long long>::value), "");
   1142     static_assert((std::is_same<decltype(std::llround((bool)0)), long long>::value), "");
   1143     static_assert((std::is_same<decltype(std::llround((unsigned short)0)), long long>::value), "");
   1144     static_assert((std::is_same<decltype(std::llround((int)0)), long long>::value), "");
   1145     static_assert((std::is_same<decltype(std::llround((unsigned int)0)), long long>::value), "");
   1146     static_assert((std::is_same<decltype(std::llround((long)0)), long long>::value), "");
   1147     static_assert((std::is_same<decltype(std::llround((unsigned long)0)), long long>::value), "");
   1148     static_assert((std::is_same<decltype(std::llround((long long)0)), long long>::value), "");
   1149     static_assert((std::is_same<decltype(std::llround((unsigned long long)0)), long long>::value), "");
   1150     static_assert((std::is_same<decltype(std::llround((double)0)), long long>::value), "");
   1151     static_assert((std::is_same<decltype(std::llround((long double)0)), long long>::value), "");
   1152     static_assert((std::is_same<decltype(std::llroundf(0)), long long>::value), "");
   1153     static_assert((std::is_same<decltype(std::llroundl(0)), long long>::value), "");
   1154     static_assert((std::is_same<decltype(llround(Ambiguous())), Ambiguous>::value), "");
   1155     assert(std::llround(1) == 1LL);
   1156 }
   1157 
   1158 void test_log1p()
   1159 {
   1160     static_assert((std::is_same<decltype(std::log1p((float)0)), float>::value), "");
   1161     static_assert((std::is_same<decltype(std::log1p((bool)0)), double>::value), "");
   1162     static_assert((std::is_same<decltype(std::log1p((unsigned short)0)), double>::value), "");
   1163     static_assert((std::is_same<decltype(std::log1p((int)0)), double>::value), "");
   1164     static_assert((std::is_same<decltype(std::log1p((unsigned int)0)), double>::value), "");
   1165     static_assert((std::is_same<decltype(std::log1p((long)0)), double>::value), "");
   1166     static_assert((std::is_same<decltype(std::log1p((unsigned long)0)), double>::value), "");
   1167     static_assert((std::is_same<decltype(std::log1p((long long)0)), double>::value), "");
   1168     static_assert((std::is_same<decltype(std::log1p((unsigned long long)0)), double>::value), "");
   1169     static_assert((std::is_same<decltype(std::log1p((double)0)), double>::value), "");
   1170     static_assert((std::is_same<decltype(std::log1p((long double)0)), long double>::value), "");
   1171     static_assert((std::is_same<decltype(std::log1pf(0)), float>::value), "");
   1172     static_assert((std::is_same<decltype(std::log1pl(0)), long double>::value), "");
   1173     static_assert((std::is_same<decltype(log1p(Ambiguous())), Ambiguous>::value), "");
   1174     assert(std::log1p(0) == 0);
   1175 }
   1176 
   1177 void test_log2()
   1178 {
   1179     static_assert((std::is_same<decltype(std::log2((float)0)), float>::value), "");
   1180     static_assert((std::is_same<decltype(std::log2((bool)0)), double>::value), "");
   1181     static_assert((std::is_same<decltype(std::log2((unsigned short)0)), double>::value), "");
   1182     static_assert((std::is_same<decltype(std::log2((int)0)), double>::value), "");
   1183     static_assert((std::is_same<decltype(std::log2((unsigned int)0)), double>::value), "");
   1184     static_assert((std::is_same<decltype(std::log2((long)0)), double>::value), "");
   1185     static_assert((std::is_same<decltype(std::log2((unsigned long)0)), double>::value), "");
   1186     static_assert((std::is_same<decltype(std::log2((long long)0)), double>::value), "");
   1187     static_assert((std::is_same<decltype(std::log2((unsigned long long)0)), double>::value), "");
   1188     static_assert((std::is_same<decltype(std::log2((double)0)), double>::value), "");
   1189     static_assert((std::is_same<decltype(std::log2((long double)0)), long double>::value), "");
   1190     static_assert((std::is_same<decltype(std::log2f(0)), float>::value), "");
   1191     static_assert((std::is_same<decltype(std::log2l(0)), long double>::value), "");
   1192     static_assert((std::is_same<decltype(log2(Ambiguous())), Ambiguous>::value), "");
   1193     assert(std::log2(1) == 0);
   1194 }
   1195 
   1196 void test_logb()
   1197 {
   1198     static_assert((std::is_same<decltype(std::logb((float)0)), float>::value), "");
   1199     static_assert((std::is_same<decltype(std::logb((bool)0)), double>::value), "");
   1200     static_assert((std::is_same<decltype(std::logb((unsigned short)0)), double>::value), "");
   1201     static_assert((std::is_same<decltype(std::logb((int)0)), double>::value), "");
   1202     static_assert((std::is_same<decltype(std::logb((unsigned int)0)), double>::value), "");
   1203     static_assert((std::is_same<decltype(std::logb((long)0)), double>::value), "");
   1204     static_assert((std::is_same<decltype(std::logb((unsigned long)0)), double>::value), "");
   1205     static_assert((std::is_same<decltype(std::logb((long long)0)), double>::value), "");
   1206     static_assert((std::is_same<decltype(std::logb((unsigned long long)0)), double>::value), "");
   1207     static_assert((std::is_same<decltype(std::logb((double)0)), double>::value), "");
   1208     static_assert((std::is_same<decltype(std::logb((long double)0)), long double>::value), "");
   1209     static_assert((std::is_same<decltype(std::logbf(0)), float>::value), "");
   1210     static_assert((std::is_same<decltype(std::logbl(0)), long double>::value), "");
   1211     static_assert((std::is_same<decltype(logb(Ambiguous())), Ambiguous>::value), "");
   1212     assert(std::logb(1) == 0);
   1213 }
   1214 
   1215 void test_lrint()
   1216 {
   1217     static_assert((std::is_same<decltype(std::lrint((float)0)), long>::value), "");
   1218     static_assert((std::is_same<decltype(std::lrint((bool)0)), long>::value), "");
   1219     static_assert((std::is_same<decltype(std::lrint((unsigned short)0)), long>::value), "");
   1220     static_assert((std::is_same<decltype(std::lrint((int)0)), long>::value), "");
   1221     static_assert((std::is_same<decltype(std::lrint((unsigned int)0)), long>::value), "");
   1222     static_assert((std::is_same<decltype(std::lrint((long)0)), long>::value), "");
   1223     static_assert((std::is_same<decltype(std::lrint((unsigned long)0)), long>::value), "");
   1224     static_assert((std::is_same<decltype(std::lrint((long long)0)), long>::value), "");
   1225     static_assert((std::is_same<decltype(std::lrint((unsigned long long)0)), long>::value), "");
   1226     static_assert((std::is_same<decltype(std::lrint((double)0)), long>::value), "");
   1227     static_assert((std::is_same<decltype(std::lrint((long double)0)), long>::value), "");
   1228     static_assert((std::is_same<decltype(std::lrintf(0)), long>::value), "");
   1229     static_assert((std::is_same<decltype(std::lrintl(0)), long>::value), "");
   1230     static_assert((std::is_same<decltype(lrint(Ambiguous())), Ambiguous>::value), "");
   1231     assert(std::lrint(1) == 1L);
   1232 }
   1233 
   1234 void test_lround()
   1235 {
   1236     static_assert((std::is_same<decltype(std::lround((float)0)), long>::value), "");
   1237     static_assert((std::is_same<decltype(std::lround((bool)0)), long>::value), "");
   1238     static_assert((std::is_same<decltype(std::lround((unsigned short)0)), long>::value), "");
   1239     static_assert((std::is_same<decltype(std::lround((int)0)), long>::value), "");
   1240     static_assert((std::is_same<decltype(std::lround((unsigned int)0)), long>::value), "");
   1241     static_assert((std::is_same<decltype(std::lround((long)0)), long>::value), "");
   1242     static_assert((std::is_same<decltype(std::lround((unsigned long)0)), long>::value), "");
   1243     static_assert((std::is_same<decltype(std::lround((long long)0)), long>::value), "");
   1244     static_assert((std::is_same<decltype(std::lround((unsigned long long)0)), long>::value), "");
   1245     static_assert((std::is_same<decltype(std::lround((double)0)), long>::value), "");
   1246     static_assert((std::is_same<decltype(std::lround((long double)0)), long>::value), "");
   1247     static_assert((std::is_same<decltype(std::lroundf(0)), long>::value), "");
   1248     static_assert((std::is_same<decltype(std::lroundl(0)), long>::value), "");
   1249     static_assert((std::is_same<decltype(lround(Ambiguous())), Ambiguous>::value), "");
   1250     assert(std::lround(1) == 1L);
   1251 }
   1252 
   1253 void test_nan()
   1254 {
   1255     static_assert((std::is_same<decltype(std::nan("")), double>::value), "");
   1256     static_assert((std::is_same<decltype(std::nanf("")), float>::value), "");
   1257     static_assert((std::is_same<decltype(std::nanl("")), long double>::value), "");
   1258 }
   1259 
   1260 void test_nearbyint()
   1261 {
   1262     static_assert((std::is_same<decltype(std::nearbyint((float)0)), float>::value), "");
   1263     static_assert((std::is_same<decltype(std::nearbyint((bool)0)), double>::value), "");
   1264     static_assert((std::is_same<decltype(std::nearbyint((unsigned short)0)), double>::value), "");
   1265     static_assert((std::is_same<decltype(std::nearbyint((int)0)), double>::value), "");
   1266     static_assert((std::is_same<decltype(std::nearbyint((unsigned int)0)), double>::value), "");
   1267     static_assert((std::is_same<decltype(std::nearbyint((long)0)), double>::value), "");
   1268     static_assert((std::is_same<decltype(std::nearbyint((unsigned long)0)), double>::value), "");
   1269     static_assert((std::is_same<decltype(std::nearbyint((long long)0)), double>::value), "");
   1270     static_assert((std::is_same<decltype(std::nearbyint((unsigned long long)0)), double>::value), "");
   1271     static_assert((std::is_same<decltype(std::nearbyint((double)0)), double>::value), "");
   1272     static_assert((std::is_same<decltype(std::nearbyint((long double)0)), long double>::value), "");
   1273     static_assert((std::is_same<decltype(std::nearbyintf(0)), float>::value), "");
   1274     static_assert((std::is_same<decltype(std::nearbyintl(0)), long double>::value), "");
   1275     static_assert((std::is_same<decltype(nearbyint(Ambiguous())), Ambiguous>::value), "");
   1276     assert(std::nearbyint(1) == 1);
   1277 }
   1278 
   1279 void test_nextafter()
   1280 {
   1281     static_assert((std::is_same<decltype(std::nextafter((float)0, (float)0)), float>::value), "");
   1282     static_assert((std::is_same<decltype(std::nextafter((bool)0, (float)0)), double>::value), "");
   1283     static_assert((std::is_same<decltype(std::nextafter((unsigned short)0, (double)0)), double>::value), "");
   1284     static_assert((std::is_same<decltype(std::nextafter((int)0, (long double)0)), long double>::value), "");
   1285     static_assert((std::is_same<decltype(std::nextafter((float)0, (unsigned int)0)), double>::value), "");
   1286     static_assert((std::is_same<decltype(std::nextafter((double)0, (long)0)), double>::value), "");
   1287     static_assert((std::is_same<decltype(std::nextafter((long double)0, (unsigned long)0)), long double>::value), "");
   1288     static_assert((std::is_same<decltype(std::nextafter((int)0, (long long)0)), double>::value), "");
   1289     static_assert((std::is_same<decltype(std::nextafter((int)0, (unsigned long long)0)), double>::value), "");
   1290     static_assert((std::is_same<decltype(std::nextafter((double)0, (double)0)), double>::value), "");
   1291     static_assert((std::is_same<decltype(std::nextafter((long double)0, (long double)0)), long double>::value), "");
   1292     static_assert((std::is_same<decltype(std::nextafter((float)0, (double)0)), double>::value), "");
   1293     static_assert((std::is_same<decltype(std::nextafter((float)0, (long double)0)), long double>::value), "");
   1294     static_assert((std::is_same<decltype(std::nextafter((double)0, (long double)0)), long double>::value), "");
   1295     static_assert((std::is_same<decltype(std::nextafterf(0,0)), float>::value), "");
   1296     static_assert((std::is_same<decltype(std::nextafterl(0,0)), long double>::value), "");
   1297     static_assert((std::is_same<decltype(std::nextafter((int)0, (int)0)), double>::value), "");
   1298     static_assert((std::is_same<decltype(nextafter(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1299     assert(std::nextafter(0,1) == hexfloat<double>(0x1, 0, -1074));
   1300 }
   1301 
   1302 void test_nexttoward()
   1303 {
   1304     static_assert((std::is_same<decltype(std::nexttoward((float)0, (long double)0)), float>::value), "");
   1305     static_assert((std::is_same<decltype(std::nexttoward((bool)0, (long double)0)), double>::value), "");
   1306     static_assert((std::is_same<decltype(std::nexttoward((unsigned short)0, (long double)0)), double>::value), "");
   1307     static_assert((std::is_same<decltype(std::nexttoward((int)0, (long double)0)), double>::value), "");
   1308     static_assert((std::is_same<decltype(std::nexttoward((unsigned int)0, (long double)0)), double>::value), "");
   1309     static_assert((std::is_same<decltype(std::nexttoward((long)0, (long double)0)), double>::value), "");
   1310     static_assert((std::is_same<decltype(std::nexttoward((unsigned long)0, (long double)0)), double>::value), "");
   1311     static_assert((std::is_same<decltype(std::nexttoward((long long)0, (long double)0)), double>::value), "");
   1312     static_assert((std::is_same<decltype(std::nexttoward((unsigned long long)0, (long double)0)), double>::value), "");
   1313     static_assert((std::is_same<decltype(std::nexttoward((double)0, (long double)0)), double>::value), "");
   1314     static_assert((std::is_same<decltype(std::nexttoward((long double)0, (long double)0)), long double>::value), "");
   1315     static_assert((std::is_same<decltype(std::nexttowardf(0, (long double)0)), float>::value), "");
   1316     static_assert((std::is_same<decltype(std::nexttowardl(0, (long double)0)), long double>::value), "");
   1317     static_assert((std::is_same<decltype(nexttoward(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1318     assert(std::nexttoward(0, 1) == hexfloat<double>(0x1, 0, -1074));
   1319 }
   1320 
   1321 void test_remainder()
   1322 {
   1323     static_assert((std::is_same<decltype(std::remainder((float)0, (float)0)), float>::value), "");
   1324     static_assert((std::is_same<decltype(std::remainder((bool)0, (float)0)), double>::value), "");
   1325     static_assert((std::is_same<decltype(std::remainder((unsigned short)0, (double)0)), double>::value), "");
   1326     static_assert((std::is_same<decltype(std::remainder((int)0, (long double)0)), long double>::value), "");
   1327     static_assert((std::is_same<decltype(std::remainder((float)0, (unsigned int)0)), double>::value), "");
   1328     static_assert((std::is_same<decltype(std::remainder((double)0, (long)0)), double>::value), "");
   1329     static_assert((std::is_same<decltype(std::remainder((long double)0, (unsigned long)0)), long double>::value), "");
   1330     static_assert((std::is_same<decltype(std::remainder((int)0, (long long)0)), double>::value), "");
   1331     static_assert((std::is_same<decltype(std::remainder((int)0, (unsigned long long)0)), double>::value), "");
   1332     static_assert((std::is_same<decltype(std::remainder((double)0, (double)0)), double>::value), "");
   1333     static_assert((std::is_same<decltype(std::remainder((long double)0, (long double)0)), long double>::value), "");
   1334     static_assert((std::is_same<decltype(std::remainder((float)0, (double)0)), double>::value), "");
   1335     static_assert((std::is_same<decltype(std::remainder((float)0, (long double)0)), long double>::value), "");
   1336     static_assert((std::is_same<decltype(std::remainder((double)0, (long double)0)), long double>::value), "");
   1337     static_assert((std::is_same<decltype(std::remainderf(0,0)), float>::value), "");
   1338     static_assert((std::is_same<decltype(std::remainderl(0,0)), long double>::value), "");
   1339     static_assert((std::is_same<decltype(std::remainder((int)0, (int)0)), double>::value), "");
   1340     static_assert((std::is_same<decltype(remainder(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1341     assert(std::remainder(0.5,1) == 0.5);
   1342 }
   1343 
   1344 void test_remquo()
   1345 {
   1346     int ip;
   1347     static_assert((std::is_same<decltype(std::remquo((float)0, (float)0, &ip)), float>::value), "");
   1348     static_assert((std::is_same<decltype(std::remquo((bool)0, (float)0, &ip)), double>::value), "");
   1349     static_assert((std::is_same<decltype(std::remquo((unsigned short)0, (double)0, &ip)), double>::value), "");
   1350     static_assert((std::is_same<decltype(std::remquo((int)0, (long double)0, &ip)), long double>::value), "");
   1351     static_assert((std::is_same<decltype(std::remquo((float)0, (unsigned int)0, &ip)), double>::value), "");
   1352     static_assert((std::is_same<decltype(std::remquo((double)0, (long)0, &ip)), double>::value), "");
   1353     static_assert((std::is_same<decltype(std::remquo((long double)0, (unsigned long)0, &ip)), long double>::value), "");
   1354     static_assert((std::is_same<decltype(std::remquo((int)0, (long long)0, &ip)), double>::value), "");
   1355     static_assert((std::is_same<decltype(std::remquo((int)0, (unsigned long long)0, &ip)), double>::value), "");
   1356     static_assert((std::is_same<decltype(std::remquo((double)0, (double)0, &ip)), double>::value), "");
   1357     static_assert((std::is_same<decltype(std::remquo((long double)0, (long double)0, &ip)), long double>::value), "");
   1358     static_assert((std::is_same<decltype(std::remquo((float)0, (double)0, &ip)), double>::value), "");
   1359     static_assert((std::is_same<decltype(std::remquo((float)0, (long double)0, &ip)), long double>::value), "");
   1360     static_assert((std::is_same<decltype(std::remquo((double)0, (long double)0, &ip)), long double>::value), "");
   1361     static_assert((std::is_same<decltype(std::remquof(0,0, &ip)), float>::value), "");
   1362     static_assert((std::is_same<decltype(std::remquol(0,0, &ip)), long double>::value), "");
   1363     static_assert((std::is_same<decltype(std::remquo((int)0, (int)0, &ip)), double>::value), "");
   1364     static_assert((std::is_same<decltype(remquo(Ambiguous(), Ambiguous(), &ip)), Ambiguous>::value), "");
   1365     assert(std::remquo(0.5,1, &ip) == 0.5);
   1366 }
   1367 
   1368 void test_rint()
   1369 {
   1370     static_assert((std::is_same<decltype(std::rint((float)0)), float>::value), "");
   1371     static_assert((std::is_same<decltype(std::rint((bool)0)), double>::value), "");
   1372     static_assert((std::is_same<decltype(std::rint((unsigned short)0)), double>::value), "");
   1373     static_assert((std::is_same<decltype(std::rint((int)0)), double>::value), "");
   1374     static_assert((std::is_same<decltype(std::rint((unsigned int)0)), double>::value), "");
   1375     static_assert((std::is_same<decltype(std::rint((long)0)), double>::value), "");
   1376     static_assert((std::is_same<decltype(std::rint((unsigned long)0)), double>::value), "");
   1377     static_assert((std::is_same<decltype(std::rint((long long)0)), double>::value), "");
   1378     static_assert((std::is_same<decltype(std::rint((unsigned long long)0)), double>::value), "");
   1379     static_assert((std::is_same<decltype(std::rint((double)0)), double>::value), "");
   1380     static_assert((std::is_same<decltype(std::rint((long double)0)), long double>::value), "");
   1381     static_assert((std::is_same<decltype(std::rintf(0)), float>::value), "");
   1382     static_assert((std::is_same<decltype(std::rintl(0)), long double>::value), "");
   1383     static_assert((std::is_same<decltype(rint(Ambiguous())), Ambiguous>::value), "");
   1384     assert(std::rint(1) == 1);
   1385 }
   1386 
   1387 void test_round()
   1388 {
   1389     static_assert((std::is_same<decltype(std::round((float)0)), float>::value), "");
   1390     static_assert((std::is_same<decltype(std::round((bool)0)), double>::value), "");
   1391     static_assert((std::is_same<decltype(std::round((unsigned short)0)), double>::value), "");
   1392     static_assert((std::is_same<decltype(std::round((int)0)), double>::value), "");
   1393     static_assert((std::is_same<decltype(std::round((unsigned int)0)), double>::value), "");
   1394     static_assert((std::is_same<decltype(std::round((long)0)), double>::value), "");
   1395     static_assert((std::is_same<decltype(std::round((unsigned long)0)), double>::value), "");
   1396     static_assert((std::is_same<decltype(std::round((long long)0)), double>::value), "");
   1397     static_assert((std::is_same<decltype(std::round((unsigned long long)0)), double>::value), "");
   1398     static_assert((std::is_same<decltype(std::round((double)0)), double>::value), "");
   1399     static_assert((std::is_same<decltype(std::round((long double)0)), long double>::value), "");
   1400     static_assert((std::is_same<decltype(std::roundf(0)), float>::value), "");
   1401     static_assert((std::is_same<decltype(std::roundl(0)), long double>::value), "");
   1402     static_assert((std::is_same<decltype(round(Ambiguous())), Ambiguous>::value), "");
   1403     assert(std::round(1) == 1);
   1404 }
   1405 
   1406 void test_scalbln()
   1407 {
   1408     static_assert((std::is_same<decltype(std::scalbln((float)0, (long)0)), float>::value), "");
   1409     static_assert((std::is_same<decltype(std::scalbln((bool)0, (long)0)), double>::value), "");
   1410     static_assert((std::is_same<decltype(std::scalbln((unsigned short)0, (long)0)), double>::value), "");
   1411     static_assert((std::is_same<decltype(std::scalbln((int)0, (long)0)), double>::value), "");
   1412     static_assert((std::is_same<decltype(std::scalbln((unsigned int)0, (long)0)), double>::value), "");
   1413     static_assert((std::is_same<decltype(std::scalbln((long)0, (long)0)), double>::value), "");
   1414     static_assert((std::is_same<decltype(std::scalbln((unsigned long)0, (long)0)), double>::value), "");
   1415     static_assert((std::is_same<decltype(std::scalbln((long long)0, (long)0)), double>::value), "");
   1416     static_assert((std::is_same<decltype(std::scalbln((unsigned long long)0, (long)0)), double>::value), "");
   1417     static_assert((std::is_same<decltype(std::scalbln((double)0, (long)0)), double>::value), "");
   1418     static_assert((std::is_same<decltype(std::scalbln((long double)0, (long)0)), long double>::value), "");
   1419     static_assert((std::is_same<decltype(std::scalblnf(0, (long)0)), float>::value), "");
   1420     static_assert((std::is_same<decltype(std::scalblnl(0, (long)0)), long double>::value), "");
   1421     static_assert((std::is_same<decltype(scalbln(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1422     assert(std::scalbln(1, 1) == 2);
   1423 }
   1424 
   1425 void test_scalbn()
   1426 {
   1427     static_assert((std::is_same<decltype(std::scalbn((float)0, (int)0)), float>::value), "");
   1428     static_assert((std::is_same<decltype(std::scalbn((bool)0, (int)0)), double>::value), "");
   1429     static_assert((std::is_same<decltype(std::scalbn((unsigned short)0, (int)0)), double>::value), "");
   1430     static_assert((std::is_same<decltype(std::scalbn((int)0, (int)0)), double>::value), "");
   1431     static_assert((std::is_same<decltype(std::scalbn((unsigned int)0, (int)0)), double>::value), "");
   1432     static_assert((std::is_same<decltype(std::scalbn((long)0, (int)0)), double>::value), "");
   1433     static_assert((std::is_same<decltype(std::scalbn((unsigned long)0, (int)0)), double>::value), "");
   1434     static_assert((std::is_same<decltype(std::scalbn((long long)0, (int)0)), double>::value), "");
   1435     static_assert((std::is_same<decltype(std::scalbn((unsigned long long)0, (int)0)), double>::value), "");
   1436     static_assert((std::is_same<decltype(std::scalbn((double)0, (int)0)), double>::value), "");
   1437     static_assert((std::is_same<decltype(std::scalbn((long double)0, (int)0)), long double>::value), "");
   1438     static_assert((std::is_same<decltype(std::scalbnf(0, (int)0)), float>::value), "");
   1439     static_assert((std::is_same<decltype(std::scalbnl(0, (int)0)), long double>::value), "");
   1440     static_assert((std::is_same<decltype(scalbn(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
   1441     assert(std::scalbn(1, 1) == 2);
   1442 }
   1443 
   1444 void test_tgamma()
   1445 {
   1446     static_assert((std::is_same<decltype(std::tgamma((float)0)), float>::value), "");
   1447     static_assert((std::is_same<decltype(std::tgamma((bool)0)), double>::value), "");
   1448     static_assert((std::is_same<decltype(std::tgamma((unsigned short)0)), double>::value), "");
   1449     static_assert((std::is_same<decltype(std::tgamma((int)0)), double>::value), "");
   1450     static_assert((std::is_same<decltype(std::tgamma((unsigned int)0)), double>::value), "");
   1451     static_assert((std::is_same<decltype(std::tgamma((long)0)), double>::value), "");
   1452     static_assert((std::is_same<decltype(std::tgamma((unsigned long)0)), double>::value), "");
   1453     static_assert((std::is_same<decltype(std::tgamma((long long)0)), double>::value), "");
   1454     static_assert((std::is_same<decltype(std::tgamma((unsigned long long)0)), double>::value), "");
   1455     static_assert((std::is_same<decltype(std::tgamma((double)0)), double>::value), "");
   1456     static_assert((std::is_same<decltype(std::tgamma((long double)0)), long double>::value), "");
   1457     static_assert((std::is_same<decltype(std::tgammaf(0)), float>::value), "");
   1458     static_assert((std::is_same<decltype(std::tgammal(0)), long double>::value), "");
   1459     static_assert((std::is_same<decltype(tgamma(Ambiguous())), Ambiguous>::value), "");
   1460     assert(std::tgamma(1) == 1);
   1461 }
   1462 
   1463 void test_trunc()
   1464 {
   1465     static_assert((std::is_same<decltype(std::trunc((float)0)), float>::value), "");
   1466     static_assert((std::is_same<decltype(std::trunc((bool)0)), double>::value), "");
   1467     static_assert((std::is_same<decltype(std::trunc((unsigned short)0)), double>::value), "");
   1468     static_assert((std::is_same<decltype(std::trunc((int)0)), double>::value), "");
   1469     static_assert((std::is_same<decltype(std::trunc((unsigned int)0)), double>::value), "");
   1470     static_assert((std::is_same<decltype(std::trunc((long)0)), double>::value), "");
   1471     static_assert((std::is_same<decltype(std::trunc((unsigned long)0)), double>::value), "");
   1472     static_assert((std::is_same<decltype(std::trunc((long long)0)), double>::value), "");
   1473     static_assert((std::is_same<decltype(std::trunc((unsigned long long)0)), double>::value), "");
   1474     static_assert((std::is_same<decltype(std::trunc((double)0)), double>::value), "");
   1475     static_assert((std::is_same<decltype(std::trunc((long double)0)), long double>::value), "");
   1476     static_assert((std::is_same<decltype(std::truncf(0)), float>::value), "");
   1477     static_assert((std::is_same<decltype(std::truncl(0)), long double>::value), "");
   1478     static_assert((std::is_same<decltype(trunc(Ambiguous())), Ambiguous>::value), "");
   1479     assert(std::trunc(1) == 1);
   1480 }
   1481 
   1482 int main()
   1483 {
   1484     test_abs();
   1485     test_acos();
   1486     test_asin();
   1487     test_atan();
   1488     test_atan2();
   1489     test_ceil();
   1490     test_cos();
   1491     test_cosh();
   1492     test_exp();
   1493     test_fabs();
   1494     test_floor();
   1495     test_fmod();
   1496     test_frexp();
   1497     test_ldexp();
   1498     test_log();
   1499     test_log10();
   1500     test_modf();
   1501     test_pow();
   1502     test_sin();
   1503     test_sinh();
   1504     test_sqrt();
   1505     test_tan();
   1506     test_tanh();
   1507     test_signbit();
   1508     test_fpclassify();
   1509     test_isfinite();
   1510     test_isnormal();
   1511     test_isgreater();
   1512     test_isgreaterequal();
   1513     test_isinf();
   1514     test_isless();
   1515     test_islessequal();
   1516     test_islessgreater();
   1517     test_isnan();
   1518     test_isunordered();
   1519     test_acosh();
   1520     test_asinh();
   1521     test_atanh();
   1522     test_cbrt();
   1523     test_copysign();
   1524     test_erf();
   1525     test_erfc();
   1526     test_exp2();
   1527     test_expm1();
   1528     test_fdim();
   1529     test_fma();
   1530     test_fmax();
   1531     test_fmin();
   1532     test_hypot();
   1533     test_ilogb();
   1534     test_lgamma();
   1535     test_llrint();
   1536     test_llround();
   1537     test_log1p();
   1538     test_log2();
   1539     test_logb();
   1540     test_lrint();
   1541     test_lround();
   1542     test_nan();
   1543     test_nearbyint();
   1544     test_nextafter();
   1545     test_nexttoward();
   1546     test_remainder();
   1547     test_remquo();
   1548     test_rint();
   1549     test_round();
   1550     test_scalbln();
   1551     test_scalbn();
   1552     test_tgamma();
   1553     test_trunc();
   1554 }
   1555