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