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