1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <math.h>
10 
11 #include <math.h>
12 #include <type_traits>
13 #include <cassert>
14 
15 #include "test_macros.h"
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 template <class T, class = decltype(::abs(std::declval<T>()))>
102 std::true_type has_abs_imp(int);
103 template <class T>
104 std::false_type has_abs_imp(...);
105 
106 template <class T>
107 struct has_abs : decltype(has_abs_imp<T>(0)) {};
108 
109 void test_abs()
110 {
111   TEST_DIAGNOSTIC_PUSH
112   TEST_CLANG_DIAGNOSTIC_IGNORED("-Wabsolute-value")
113 
114   static_assert((std::is_same<decltype(abs((float)0)), float>::value), "");
115   static_assert((std::is_same<decltype(abs((double)0)), double>::value), "");
116   static_assert(
117       (std::is_same<decltype(abs((long double)0)), long double>::value), "");
118   static_assert((std::is_same<decltype(abs((int)0)), int>::value), "");
119   static_assert((std::is_same<decltype(abs((long)0)), long>::value), "");
120   static_assert((std::is_same<decltype(abs((long long)0)), long long>::value),
121                 "");
122   static_assert((std::is_same<decltype(abs((unsigned char)0)), int>::value),
123                 "");
124   static_assert((std::is_same<decltype(abs((unsigned short)0)), int>::value),
125                 "");
126 
127   static_assert((std::is_same<decltype(abs(Ambiguous())), Ambiguous>::value),
128                 "");
129 
130   static_assert(!has_abs<unsigned>::value, "");
131   static_assert(!has_abs<unsigned long>::value, "");
132   static_assert(!has_abs<unsigned long long>::value, "");
133 
134   TEST_DIAGNOSTIC_POP
135 
136   assert(abs(-1.) == 1);
137 }
138 
139 void test_acos()
140 {
141     static_assert((std::is_same<decltype(acos((float)0)), float>::value), "");
142     static_assert((std::is_same<decltype(acos((bool)0)), double>::value), "");
143     static_assert((std::is_same<decltype(acos((unsigned short)0)), double>::value), "");
144     static_assert((std::is_same<decltype(acos((int)0)), double>::value), "");
145     static_assert((std::is_same<decltype(acos((unsigned int)0)), double>::value), "");
146     static_assert((std::is_same<decltype(acos((long)0)), double>::value), "");
147     static_assert((std::is_same<decltype(acos((unsigned long)0)), double>::value), "");
148     static_assert((std::is_same<decltype(acos((long long)0)), double>::value), "");
149     static_assert((std::is_same<decltype(acos((unsigned long long)0)), double>::value), "");
150     static_assert((std::is_same<decltype(acos((double)0)), double>::value), "");
151     static_assert((std::is_same<decltype(acos((long double)0)), long double>::value), "");
152     static_assert((std::is_same<decltype(acosf(0)), float>::value), "");
153     static_assert((std::is_same<decltype(acosl(0)), long double>::value), "");
154     static_assert((std::is_same<decltype(acos(Ambiguous())), Ambiguous>::value), "");
155     assert(acos(1) == 0);
156 }
157 
158 void test_asin()
159 {
160     static_assert((std::is_same<decltype(asin((float)0)), float>::value), "");
161     static_assert((std::is_same<decltype(asin((bool)0)), double>::value), "");
162     static_assert((std::is_same<decltype(asin((unsigned short)0)), double>::value), "");
163     static_assert((std::is_same<decltype(asin((int)0)), double>::value), "");
164     static_assert((std::is_same<decltype(asin((unsigned int)0)), double>::value), "");
165     static_assert((std::is_same<decltype(asin((long)0)), double>::value), "");
166     static_assert((std::is_same<decltype(asin((unsigned long)0)), double>::value), "");
167     static_assert((std::is_same<decltype(asin((long long)0)), double>::value), "");
168     static_assert((std::is_same<decltype(asin((unsigned long long)0)), double>::value), "");
169     static_assert((std::is_same<decltype(asin((double)0)), double>::value), "");
170     static_assert((std::is_same<decltype(asin((long double)0)), long double>::value), "");
171     static_assert((std::is_same<decltype(asinf(0)), float>::value), "");
172     static_assert((std::is_same<decltype(asinl(0)), long double>::value), "");
173     static_assert((std::is_same<decltype(asin(Ambiguous())), Ambiguous>::value), "");
174     assert(asin(0) == 0);
175 }
176 
177 void test_atan()
178 {
179     static_assert((std::is_same<decltype(atan((float)0)), float>::value), "");
180     static_assert((std::is_same<decltype(atan((bool)0)), double>::value), "");
181     static_assert((std::is_same<decltype(atan((unsigned short)0)), double>::value), "");
182     static_assert((std::is_same<decltype(atan((int)0)), double>::value), "");
183     static_assert((std::is_same<decltype(atan((unsigned int)0)), double>::value), "");
184     static_assert((std::is_same<decltype(atan((long)0)), double>::value), "");
185     static_assert((std::is_same<decltype(atan((unsigned long)0)), double>::value), "");
186     static_assert((std::is_same<decltype(atan((long long)0)), double>::value), "");
187     static_assert((std::is_same<decltype(atan((unsigned long long)0)), double>::value), "");
188     static_assert((std::is_same<decltype(atan((double)0)), double>::value), "");
189     static_assert((std::is_same<decltype(atan((long double)0)), long double>::value), "");
190     static_assert((std::is_same<decltype(atanf(0)), float>::value), "");
191     static_assert((std::is_same<decltype(atanl(0)), long double>::value), "");
192     static_assert((std::is_same<decltype(atan(Ambiguous())), Ambiguous>::value), "");
193     assert(atan(0) == 0);
194 }
195 
196 void test_atan2()
197 {
198     static_assert((std::is_same<decltype(atan2((float)0, (float)0)), float>::value), "");
199     static_assert((std::is_same<decltype(atan2((bool)0, (float)0)), double>::value), "");
200     static_assert((std::is_same<decltype(atan2((unsigned short)0, (double)0)), double>::value), "");
201     static_assert((std::is_same<decltype(atan2((int)0, (long double)0)), long double>::value), "");
202     static_assert((std::is_same<decltype(atan2((float)0, (unsigned int)0)), double>::value), "");
203     static_assert((std::is_same<decltype(atan2((double)0, (long)0)), double>::value), "");
204     static_assert((std::is_same<decltype(atan2((long double)0, (unsigned long)0)), long double>::value), "");
205     static_assert((std::is_same<decltype(atan2((int)0, (long long)0)), double>::value), "");
206     static_assert((std::is_same<decltype(atan2((int)0, (unsigned long long)0)), double>::value), "");
207     static_assert((std::is_same<decltype(atan2((double)0, (double)0)), double>::value), "");
208     static_assert((std::is_same<decltype(atan2((long double)0, (long double)0)), long double>::value), "");
209     static_assert((std::is_same<decltype(atan2((float)0, (double)0)), double>::value), "");
210     static_assert((std::is_same<decltype(atan2((float)0, (long double)0)), long double>::value), "");
211     static_assert((std::is_same<decltype(atan2((double)0, (long double)0)), long double>::value), "");
212     static_assert((std::is_same<decltype(atan2f(0,0)), float>::value), "");
213     static_assert((std::is_same<decltype(atan2l(0,0)), long double>::value), "");
214     static_assert((std::is_same<decltype(atan2((int)0, (int)0)), double>::value), "");
215     static_assert((std::is_same<decltype(atan2(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
216     assert(atan2(0,1) == 0);
217 }
218 
219 void test_ceil()
220 {
221     static_assert((std::is_same<decltype(ceil((float)0)), float>::value), "");
222     static_assert((std::is_same<decltype(ceil((bool)0)), double>::value), "");
223     static_assert((std::is_same<decltype(ceil((unsigned short)0)), double>::value), "");
224     static_assert((std::is_same<decltype(ceil((int)0)), double>::value), "");
225     static_assert((std::is_same<decltype(ceil((unsigned int)0)), double>::value), "");
226     static_assert((std::is_same<decltype(ceil((long)0)), double>::value), "");
227     static_assert((std::is_same<decltype(ceil((unsigned long)0)), double>::value), "");
228     static_assert((std::is_same<decltype(ceil((long long)0)), double>::value), "");
229     static_assert((std::is_same<decltype(ceil((unsigned long long)0)), double>::value), "");
230     static_assert((std::is_same<decltype(ceil((double)0)), double>::value), "");
231     static_assert((std::is_same<decltype(ceil((long double)0)), long double>::value), "");
232     static_assert((std::is_same<decltype(ceilf(0)), float>::value), "");
233     static_assert((std::is_same<decltype(ceill(0)), long double>::value), "");
234     static_assert((std::is_same<decltype(ceil(Ambiguous())), Ambiguous>::value), "");
235     assert(ceil(0) == 0);
236 }
237 
238 void test_cos()
239 {
240     static_assert((std::is_same<decltype(cos((float)0)), float>::value), "");
241     static_assert((std::is_same<decltype(cos((bool)0)), double>::value), "");
242     static_assert((std::is_same<decltype(cos((unsigned short)0)), double>::value), "");
243     static_assert((std::is_same<decltype(cos((int)0)), double>::value), "");
244     static_assert((std::is_same<decltype(cos((unsigned int)0)), double>::value), "");
245     static_assert((std::is_same<decltype(cos((long)0)), double>::value), "");
246     static_assert((std::is_same<decltype(cos((unsigned long)0)), double>::value), "");
247     static_assert((std::is_same<decltype(cos((long long)0)), double>::value), "");
248     static_assert((std::is_same<decltype(cos((unsigned long long)0)), double>::value), "");
249     static_assert((std::is_same<decltype(cos((double)0)), double>::value), "");
250     static_assert((std::is_same<decltype(cos((long double)0)), long double>::value), "");
251     static_assert((std::is_same<decltype(cosf(0)), float>::value), "");
252     static_assert((std::is_same<decltype(cosl(0)), long double>::value), "");
253     static_assert((std::is_same<decltype(cos(Ambiguous())), Ambiguous>::value), "");
254     assert(cos(0) == 1);
255 }
256 
257 void test_cosh()
258 {
259     static_assert((std::is_same<decltype(cosh((float)0)), float>::value), "");
260     static_assert((std::is_same<decltype(cosh((bool)0)), double>::value), "");
261     static_assert((std::is_same<decltype(cosh((unsigned short)0)), double>::value), "");
262     static_assert((std::is_same<decltype(cosh((int)0)), double>::value), "");
263     static_assert((std::is_same<decltype(cosh((unsigned int)0)), double>::value), "");
264     static_assert((std::is_same<decltype(cosh((long)0)), double>::value), "");
265     static_assert((std::is_same<decltype(cosh((unsigned long)0)), double>::value), "");
266     static_assert((std::is_same<decltype(cosh((long long)0)), double>::value), "");
267     static_assert((std::is_same<decltype(cosh((unsigned long long)0)), double>::value), "");
268     static_assert((std::is_same<decltype(cosh((double)0)), double>::value), "");
269     static_assert((std::is_same<decltype(cosh((long double)0)), long double>::value), "");
270     static_assert((std::is_same<decltype(coshf(0)), float>::value), "");
271     static_assert((std::is_same<decltype(coshl(0)), long double>::value), "");
272     static_assert((std::is_same<decltype(cosh(Ambiguous())), Ambiguous>::value), "");
273     assert(cosh(0) == 1);
274 }
275 
276 void test_exp()
277 {
278     static_assert((std::is_same<decltype(exp((float)0)), float>::value), "");
279     static_assert((std::is_same<decltype(exp((bool)0)), double>::value), "");
280     static_assert((std::is_same<decltype(exp((unsigned short)0)), double>::value), "");
281     static_assert((std::is_same<decltype(exp((int)0)), double>::value), "");
282     static_assert((std::is_same<decltype(exp((unsigned int)0)), double>::value), "");
283     static_assert((std::is_same<decltype(exp((long)0)), double>::value), "");
284     static_assert((std::is_same<decltype(exp((unsigned long)0)), double>::value), "");
285     static_assert((std::is_same<decltype(exp((long long)0)), double>::value), "");
286     static_assert((std::is_same<decltype(exp((unsigned long long)0)), double>::value), "");
287     static_assert((std::is_same<decltype(exp((double)0)), double>::value), "");
288     static_assert((std::is_same<decltype(exp((long double)0)), long double>::value), "");
289     static_assert((std::is_same<decltype(expf(0)), float>::value), "");
290     static_assert((std::is_same<decltype(expl(0)), long double>::value), "");
291     static_assert((std::is_same<decltype(exp(Ambiguous())), Ambiguous>::value), "");
292     assert(exp(0) == 1);
293 }
294 
295 void test_fabs()
296 {
297     static_assert((std::is_same<decltype(fabs((float)0)), float>::value), "");
298     static_assert((std::is_same<decltype(fabs((bool)0)), double>::value), "");
299     static_assert((std::is_same<decltype(fabs((unsigned short)0)), double>::value), "");
300     static_assert((std::is_same<decltype(fabs((int)0)), double>::value), "");
301     static_assert((std::is_same<decltype(fabs((unsigned int)0)), double>::value), "");
302     static_assert((std::is_same<decltype(fabs((long)0)), double>::value), "");
303     static_assert((std::is_same<decltype(fabs((unsigned long)0)), double>::value), "");
304     static_assert((std::is_same<decltype(fabs((long long)0)), double>::value), "");
305     static_assert((std::is_same<decltype(fabs((unsigned long long)0)), double>::value), "");
306     static_assert((std::is_same<decltype(fabs((double)0)), double>::value), "");
307     static_assert((std::is_same<decltype(fabs((long double)0)), long double>::value), "");
308     static_assert((std::is_same<decltype(fabsf(0.0f)), float>::value), "");
309     static_assert((std::is_same<decltype(fabsl(0.0L)), long double>::value), "");
310     static_assert((std::is_same<decltype(fabs(Ambiguous())), Ambiguous>::value), "");
311     assert(fabs(-1) == 1);
312 }
313 
314 void test_floor()
315 {
316     static_assert((std::is_same<decltype(floor((float)0)), float>::value), "");
317     static_assert((std::is_same<decltype(floor((bool)0)), double>::value), "");
318     static_assert((std::is_same<decltype(floor((unsigned short)0)), double>::value), "");
319     static_assert((std::is_same<decltype(floor((int)0)), double>::value), "");
320     static_assert((std::is_same<decltype(floor((unsigned int)0)), double>::value), "");
321     static_assert((std::is_same<decltype(floor((long)0)), double>::value), "");
322     static_assert((std::is_same<decltype(floor((unsigned long)0)), double>::value), "");
323     static_assert((std::is_same<decltype(floor((long long)0)), double>::value), "");
324     static_assert((std::is_same<decltype(floor((unsigned long long)0)), double>::value), "");
325     static_assert((std::is_same<decltype(floor((double)0)), double>::value), "");
326     static_assert((std::is_same<decltype(floor((long double)0)), long double>::value), "");
327     static_assert((std::is_same<decltype(floorf(0)), float>::value), "");
328     static_assert((std::is_same<decltype(floorl(0)), long double>::value), "");
329     static_assert((std::is_same<decltype(floor(Ambiguous())), Ambiguous>::value), "");
330     assert(floor(1) == 1);
331 }
332 
333 void test_fmod()
334 {
335     static_assert((std::is_same<decltype(fmod((float)0, (float)0)), float>::value), "");
336     static_assert((std::is_same<decltype(fmod((bool)0, (float)0)), double>::value), "");
337     static_assert((std::is_same<decltype(fmod((unsigned short)0, (double)0)), double>::value), "");
338     static_assert((std::is_same<decltype(fmod((int)0, (long double)0)), long double>::value), "");
339     static_assert((std::is_same<decltype(fmod((float)0, (unsigned int)0)), double>::value), "");
340     static_assert((std::is_same<decltype(fmod((double)0, (long)0)), double>::value), "");
341     static_assert((std::is_same<decltype(fmod((long double)0, (unsigned long)0)), long double>::value), "");
342     static_assert((std::is_same<decltype(fmod((int)0, (long long)0)), double>::value), "");
343     static_assert((std::is_same<decltype(fmod((int)0, (unsigned long long)0)), double>::value), "");
344     static_assert((std::is_same<decltype(fmod((double)0, (double)0)), double>::value), "");
345     static_assert((std::is_same<decltype(fmod((long double)0, (long double)0)), long double>::value), "");
346     static_assert((std::is_same<decltype(fmod((float)0, (double)0)), double>::value), "");
347     static_assert((std::is_same<decltype(fmod((float)0, (long double)0)), long double>::value), "");
348     static_assert((std::is_same<decltype(fmod((double)0, (long double)0)), long double>::value), "");
349     static_assert((std::is_same<decltype(fmodf(0,0)), float>::value), "");
350     static_assert((std::is_same<decltype(fmodl(0,0)), long double>::value), "");
351     static_assert((std::is_same<decltype(fmod((int)0, (int)0)), double>::value), "");
352     static_assert((std::is_same<decltype(fmod(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
353     assert(fmod(1.5,1) == .5);
354 }
355 
356 void test_frexp()
357 {
358     int ip;
359     static_assert((std::is_same<decltype(frexp((float)0, &ip)), float>::value), "");
360     static_assert((std::is_same<decltype(frexp((bool)0, &ip)), double>::value), "");
361     static_assert((std::is_same<decltype(frexp((unsigned short)0, &ip)), double>::value), "");
362     static_assert((std::is_same<decltype(frexp((int)0, &ip)), double>::value), "");
363     static_assert((std::is_same<decltype(frexp((unsigned int)0, &ip)), double>::value), "");
364     static_assert((std::is_same<decltype(frexp((long)0, &ip)), double>::value), "");
365     static_assert((std::is_same<decltype(frexp((unsigned long)0, &ip)), double>::value), "");
366     static_assert((std::is_same<decltype(frexp((long long)0, &ip)), double>::value), "");
367     static_assert((std::is_same<decltype(frexp((unsigned long long)0, &ip)), double>::value), "");
368     static_assert((std::is_same<decltype(frexp((double)0, &ip)), double>::value), "");
369     static_assert((std::is_same<decltype(frexp((long double)0, &ip)), long double>::value), "");
370     static_assert((std::is_same<decltype(frexpf(0, &ip)), float>::value), "");
371     static_assert((std::is_same<decltype(frexpl(0, &ip)), long double>::value), "");
372     static_assert((std::is_same<decltype(frexp(Ambiguous(), &ip)), Ambiguous>::value), "");
373     assert(frexp(0, &ip) == 0);
374 }
375 
376 void test_ldexp()
377 {
378     int ip = 1;
379     static_assert((std::is_same<decltype(ldexp((float)0, ip)), float>::value), "");
380     static_assert((std::is_same<decltype(ldexp((bool)0, ip)), double>::value), "");
381     static_assert((std::is_same<decltype(ldexp((unsigned short)0, ip)), double>::value), "");
382     static_assert((std::is_same<decltype(ldexp((int)0, ip)), double>::value), "");
383     static_assert((std::is_same<decltype(ldexp((unsigned int)0, ip)), double>::value), "");
384     static_assert((std::is_same<decltype(ldexp((long)0, ip)), double>::value), "");
385     static_assert((std::is_same<decltype(ldexp((unsigned long)0, ip)), double>::value), "");
386     static_assert((std::is_same<decltype(ldexp((long long)0, ip)), double>::value), "");
387     static_assert((std::is_same<decltype(ldexp((unsigned long long)0, ip)), double>::value), "");
388     static_assert((std::is_same<decltype(ldexp((double)0, ip)), double>::value), "");
389     static_assert((std::is_same<decltype(ldexp((long double)0, ip)), long double>::value), "");
390     static_assert((std::is_same<decltype(ldexpf(0, ip)), float>::value), "");
391     static_assert((std::is_same<decltype(ldexpl(0, ip)), long double>::value), "");
392     static_assert((std::is_same<decltype(ldexp(Ambiguous(), ip)), Ambiguous>::value), "");
393     assert(ldexp(1, ip) == 2);
394 }
395 
396 void test_log()
397 {
398     static_assert((std::is_same<decltype(log((float)0)), float>::value), "");
399     static_assert((std::is_same<decltype(log((bool)0)), double>::value), "");
400     static_assert((std::is_same<decltype(log((unsigned short)0)), double>::value), "");
401     static_assert((std::is_same<decltype(log((int)0)), double>::value), "");
402     static_assert((std::is_same<decltype(log((unsigned int)0)), double>::value), "");
403     static_assert((std::is_same<decltype(log((long)0)), double>::value), "");
404     static_assert((std::is_same<decltype(log((unsigned long)0)), double>::value), "");
405     static_assert((std::is_same<decltype(log((long long)0)), double>::value), "");
406     static_assert((std::is_same<decltype(log((unsigned long long)0)), double>::value), "");
407     static_assert((std::is_same<decltype(log((double)0)), double>::value), "");
408     static_assert((std::is_same<decltype(log((long double)0)), long double>::value), "");
409     static_assert((std::is_same<decltype(logf(0)), float>::value), "");
410     static_assert((std::is_same<decltype(logl(0)), long double>::value), "");
411     static_assert((std::is_same<decltype(log(Ambiguous())), Ambiguous>::value), "");
412     assert(log(1) == 0);
413 }
414 
415 void test_log10()
416 {
417     static_assert((std::is_same<decltype(log10((float)0)), float>::value), "");
418     static_assert((std::is_same<decltype(log10((bool)0)), double>::value), "");
419     static_assert((std::is_same<decltype(log10((unsigned short)0)), double>::value), "");
420     static_assert((std::is_same<decltype(log10((int)0)), double>::value), "");
421     static_assert((std::is_same<decltype(log10((unsigned int)0)), double>::value), "");
422     static_assert((std::is_same<decltype(log10((long)0)), double>::value), "");
423     static_assert((std::is_same<decltype(log10((unsigned long)0)), double>::value), "");
424     static_assert((std::is_same<decltype(log10((long long)0)), double>::value), "");
425     static_assert((std::is_same<decltype(log10((unsigned long long)0)), double>::value), "");
426     static_assert((std::is_same<decltype(log10((double)0)), double>::value), "");
427     static_assert((std::is_same<decltype(log10((long double)0)), long double>::value), "");
428     static_assert((std::is_same<decltype(log10f(0)), float>::value), "");
429     static_assert((std::is_same<decltype(log10l(0)), long double>::value), "");
430     static_assert((std::is_same<decltype(log10(Ambiguous())), Ambiguous>::value), "");
431     assert(log10(1) == 0);
432 }
433 
434 void test_modf()
435 {
436     static_assert((std::is_same<decltype(modf((float)0, (float*)0)), float>::value), "");
437     static_assert((std::is_same<decltype(modf((double)0, (double*)0)), double>::value), "");
438     static_assert((std::is_same<decltype(modf((long double)0, (long double*)0)), long double>::value), "");
439     static_assert((std::is_same<decltype(modff(0, (float*)0)), float>::value), "");
440     static_assert((std::is_same<decltype(modfl(0, (long double*)0)), long double>::value), "");
441     static_assert((std::is_same<decltype(modf(Ambiguous(), (Ambiguous*)0)), Ambiguous>::value), "");
442     double i;
443     assert(modf(1., &i) == 0);
444 }
445 
446 void test_pow()
447 {
448     static_assert((std::is_same<decltype(pow((float)0, (float)0)), float>::value), "");
449     static_assert((std::is_same<decltype(pow((bool)0, (float)0)), double>::value), "");
450     static_assert((std::is_same<decltype(pow((unsigned short)0, (double)0)), double>::value), "");
451     static_assert((std::is_same<decltype(pow((int)0, (long double)0)), long double>::value), "");
452     static_assert((std::is_same<decltype(pow((float)0, (unsigned int)0)), double>::value), "");
453     static_assert((std::is_same<decltype(pow((double)0, (long)0)), double>::value), "");
454     static_assert((std::is_same<decltype(pow((long double)0, (unsigned long)0)), long double>::value), "");
455     static_assert((std::is_same<decltype(pow((int)0, (long long)0)), double>::value), "");
456     static_assert((std::is_same<decltype(pow((int)0, (unsigned long long)0)), double>::value), "");
457     static_assert((std::is_same<decltype(pow((double)0, (double)0)), double>::value), "");
458     static_assert((std::is_same<decltype(pow((long double)0, (long double)0)), long double>::value), "");
459     static_assert((std::is_same<decltype(pow((float)0, (double)0)), double>::value), "");
460     static_assert((std::is_same<decltype(pow((float)0, (long double)0)), long double>::value), "");
461     static_assert((std::is_same<decltype(pow((double)0, (long double)0)), long double>::value), "");
462     static_assert((std::is_same<decltype(powf(0,0)), float>::value), "");
463     static_assert((std::is_same<decltype(powl(0,0)), long double>::value), "");
464     static_assert((std::is_same<decltype(pow((int)0, (int)0)), double>::value), "");
465 //     static_assert((std::is_same<decltype(pow(Value<int>(), (int)0)), double>::value), "");
466 //     static_assert((std::is_same<decltype(pow(Value<long double>(), (float)0)), long double>::value), "");
467 //     static_assert((std::is_same<decltype(pow((float) 0, Value<float>())), float>::value), "");
468     static_assert((std::is_same<decltype(pow(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
469     assert(pow(1,1) == 1);
470 //     assert(pow(Value<int,1>(), Value<float,1>())  == 1);
471 //     assert(pow(1.0f, Value<double,1>()) == 1);
472 //     assert(pow(1.0, Value<int,1>()) == 1);
473 //     assert(pow(Value<long double,1>(), 1LL) == 1);
474 }
475 
476 void test_sin()
477 {
478     static_assert((std::is_same<decltype(sin((float)0)), float>::value), "");
479     static_assert((std::is_same<decltype(sin((bool)0)), double>::value), "");
480     static_assert((std::is_same<decltype(sin((unsigned short)0)), double>::value), "");
481     static_assert((std::is_same<decltype(sin((int)0)), double>::value), "");
482     static_assert((std::is_same<decltype(sin((unsigned int)0)), double>::value), "");
483     static_assert((std::is_same<decltype(sin((long)0)), double>::value), "");
484     static_assert((std::is_same<decltype(sin((unsigned long)0)), double>::value), "");
485     static_assert((std::is_same<decltype(sin((long long)0)), double>::value), "");
486     static_assert((std::is_same<decltype(sin((unsigned long long)0)), double>::value), "");
487     static_assert((std::is_same<decltype(sin((double)0)), double>::value), "");
488     static_assert((std::is_same<decltype(sin((long double)0)), long double>::value), "");
489     static_assert((std::is_same<decltype(sinf(0)), float>::value), "");
490     static_assert((std::is_same<decltype(sinl(0)), long double>::value), "");
491     static_assert((std::is_same<decltype(sin(Ambiguous())), Ambiguous>::value), "");
492     assert(sin(0) == 0);
493 }
494 
495 void test_sinh()
496 {
497     static_assert((std::is_same<decltype(sinh((float)0)), float>::value), "");
498     static_assert((std::is_same<decltype(sinh((bool)0)), double>::value), "");
499     static_assert((std::is_same<decltype(sinh((unsigned short)0)), double>::value), "");
500     static_assert((std::is_same<decltype(sinh((int)0)), double>::value), "");
501     static_assert((std::is_same<decltype(sinh((unsigned int)0)), double>::value), "");
502     static_assert((std::is_same<decltype(sinh((long)0)), double>::value), "");
503     static_assert((std::is_same<decltype(sinh((unsigned long)0)), double>::value), "");
504     static_assert((std::is_same<decltype(sinh((long long)0)), double>::value), "");
505     static_assert((std::is_same<decltype(sinh((unsigned long long)0)), double>::value), "");
506     static_assert((std::is_same<decltype(sinh((double)0)), double>::value), "");
507     static_assert((std::is_same<decltype(sinh((long double)0)), long double>::value), "");
508     static_assert((std::is_same<decltype(sinhf(0)), float>::value), "");
509     static_assert((std::is_same<decltype(sinhl(0)), long double>::value), "");
510     static_assert((std::is_same<decltype(sinh(Ambiguous())), Ambiguous>::value), "");
511     assert(sinh(0) == 0);
512 }
513 
514 void test_sqrt()
515 {
516     static_assert((std::is_same<decltype(sqrt((float)0)), float>::value), "");
517     static_assert((std::is_same<decltype(sqrt((bool)0)), double>::value), "");
518     static_assert((std::is_same<decltype(sqrt((unsigned short)0)), double>::value), "");
519     static_assert((std::is_same<decltype(sqrt((int)0)), double>::value), "");
520     static_assert((std::is_same<decltype(sqrt((unsigned int)0)), double>::value), "");
521     static_assert((std::is_same<decltype(sqrt((long)0)), double>::value), "");
522     static_assert((std::is_same<decltype(sqrt((unsigned long)0)), double>::value), "");
523     static_assert((std::is_same<decltype(sqrt((long long)0)), double>::value), "");
524     static_assert((std::is_same<decltype(sqrt((unsigned long long)0)), double>::value), "");
525     static_assert((std::is_same<decltype(sqrt((double)0)), double>::value), "");
526     static_assert((std::is_same<decltype(sqrt((long double)0)), long double>::value), "");
527     static_assert((std::is_same<decltype(sqrtf(0)), float>::value), "");
528     static_assert((std::is_same<decltype(sqrtl(0)), long double>::value), "");
529     static_assert((std::is_same<decltype(sqrt(Ambiguous())), Ambiguous>::value), "");
530     assert(sqrt(4) == 2);
531 }
532 
533 void test_tan()
534 {
535     static_assert((std::is_same<decltype(tan((float)0)), float>::value), "");
536     static_assert((std::is_same<decltype(tan((bool)0)), double>::value), "");
537     static_assert((std::is_same<decltype(tan((unsigned short)0)), double>::value), "");
538     static_assert((std::is_same<decltype(tan((int)0)), double>::value), "");
539     static_assert((std::is_same<decltype(tan((unsigned int)0)), double>::value), "");
540     static_assert((std::is_same<decltype(tan((long)0)), double>::value), "");
541     static_assert((std::is_same<decltype(tan((unsigned long)0)), double>::value), "");
542     static_assert((std::is_same<decltype(tan((long long)0)), double>::value), "");
543     static_assert((std::is_same<decltype(tan((unsigned long long)0)), double>::value), "");
544     static_assert((std::is_same<decltype(tan((double)0)), double>::value), "");
545     static_assert((std::is_same<decltype(tan((long double)0)), long double>::value), "");
546     static_assert((std::is_same<decltype(tanf(0)), float>::value), "");
547     static_assert((std::is_same<decltype(tanl(0)), long double>::value), "");
548     static_assert((std::is_same<decltype(tan(Ambiguous())), Ambiguous>::value), "");
549     assert(tan(0) == 0);
550 }
551 
552 void test_tanh()
553 {
554     static_assert((std::is_same<decltype(tanh((float)0)), float>::value), "");
555     static_assert((std::is_same<decltype(tanh((bool)0)), double>::value), "");
556     static_assert((std::is_same<decltype(tanh((unsigned short)0)), double>::value), "");
557     static_assert((std::is_same<decltype(tanh((int)0)), double>::value), "");
558     static_assert((std::is_same<decltype(tanh((unsigned int)0)), double>::value), "");
559     static_assert((std::is_same<decltype(tanh((long)0)), double>::value), "");
560     static_assert((std::is_same<decltype(tanh((unsigned long)0)), double>::value), "");
561     static_assert((std::is_same<decltype(tanh((long long)0)), double>::value), "");
562     static_assert((std::is_same<decltype(tanh((unsigned long long)0)), double>::value), "");
563     static_assert((std::is_same<decltype(tanh((double)0)), double>::value), "");
564     static_assert((std::is_same<decltype(tanh((long double)0)), long double>::value), "");
565     static_assert((std::is_same<decltype(tanhf(0)), float>::value), "");
566     static_assert((std::is_same<decltype(tanhl(0)), long double>::value), "");
567     static_assert((std::is_same<decltype(tanh(Ambiguous())), Ambiguous>::value), "");
568     assert(tanh(0) == 0);
569 }
570 
571 void test_signbit()
572 {
573 #ifdef signbit
574 #error signbit defined
575 #endif
576     static_assert((std::is_same<decltype(signbit((float)0)), bool>::value), "");
577     static_assert((std::is_same<decltype(signbit((double)0)), bool>::value), "");
578     static_assert((std::is_same<decltype(signbit(0)), bool>::value), "");
579     static_assert((std::is_same<decltype(signbit((long double)0)), bool>::value), "");
580     static_assert((std::is_same<decltype(signbit(Ambiguous())), Ambiguous>::value), "");
581     assert(signbit(-1.0) == true);
582 }
583 
584 void test_fpclassify()
585 {
586 #ifdef fpclassify
587 #error fpclassify defined
588 #endif
589     static_assert((std::is_same<decltype(fpclassify((float)0)), int>::value), "");
590     static_assert((std::is_same<decltype(fpclassify((double)0)), int>::value), "");
591     static_assert((std::is_same<decltype(fpclassify(0)), int>::value), "");
592     static_assert((std::is_same<decltype(fpclassify((long double)0)), int>::value), "");
593     static_assert((std::is_same<decltype(fpclassify(Ambiguous())), Ambiguous>::value), "");
594     assert(fpclassify(-1.0) == FP_NORMAL);
595 }
596 
597 void test_isfinite()
598 {
599 #ifdef isfinite
600 #error isfinite defined
601 #endif
602     static_assert((std::is_same<decltype(isfinite((float)0)), bool>::value), "");
603     static_assert((std::is_same<decltype(isfinite((double)0)), bool>::value), "");
604     static_assert((std::is_same<decltype(isfinite(0)), bool>::value), "");
605     static_assert((std::is_same<decltype(isfinite((long double)0)), bool>::value), "");
606     static_assert((std::is_same<decltype(isfinite(Ambiguous())), Ambiguous>::value), "");
607     assert(isfinite(-1.0) == true);
608 }
609 
610 void test_isnormal()
611 {
612 #ifdef isnormal
613 #error isnormal defined
614 #endif
615     static_assert((std::is_same<decltype(isnormal((float)0)), bool>::value), "");
616     static_assert((std::is_same<decltype(isnormal((double)0)), bool>::value), "");
617     static_assert((std::is_same<decltype(isnormal(0)), bool>::value), "");
618     static_assert((std::is_same<decltype(isnormal((long double)0)), bool>::value), "");
619     static_assert((std::is_same<decltype(isnormal(Ambiguous())), Ambiguous>::value), "");
620     assert(isnormal(-1.0) == true);
621 }
622 
623 void test_isgreater()
624 {
625 #ifdef isgreater
626 #error isgreater defined
627 #endif
628     static_assert((std::is_same<decltype(isgreater((float)0, (float)0)), bool>::value), "");
629     static_assert((std::is_same<decltype(isgreater((float)0, (double)0)), bool>::value), "");
630     static_assert((std::is_same<decltype(isgreater((float)0, (long double)0)), bool>::value), "");
631     static_assert((std::is_same<decltype(isgreater((double)0, (float)0)), bool>::value), "");
632     static_assert((std::is_same<decltype(isgreater((double)0, (double)0)), bool>::value), "");
633     static_assert((std::is_same<decltype(isgreater(0, (double)0)), bool>::value), "");
634     static_assert((std::is_same<decltype(isgreater((double)0, (long double)0)), bool>::value), "");
635     static_assert((std::is_same<decltype(isgreater((long double)0, (float)0)), bool>::value), "");
636     static_assert((std::is_same<decltype(isgreater((long double)0, (double)0)), bool>::value), "");
637     static_assert((std::is_same<decltype(isgreater((long double)0, (long double)0)), bool>::value), "");
638     static_assert((std::is_same<decltype(isgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
639     assert(isgreater(-1.0, 0.F) == false);
640 }
641 
642 void test_isgreaterequal()
643 {
644 #ifdef isgreaterequal
645 #error isgreaterequal defined
646 #endif
647     static_assert((std::is_same<decltype(isgreaterequal((float)0, (float)0)), bool>::value), "");
648     static_assert((std::is_same<decltype(isgreaterequal((float)0, (double)0)), bool>::value), "");
649     static_assert((std::is_same<decltype(isgreaterequal((float)0, (long double)0)), bool>::value), "");
650     static_assert((std::is_same<decltype(isgreaterequal((double)0, (float)0)), bool>::value), "");
651     static_assert((std::is_same<decltype(isgreaterequal((double)0, (double)0)), bool>::value), "");
652     static_assert((std::is_same<decltype(isgreaterequal(0, (double)0)), bool>::value), "");
653     static_assert((std::is_same<decltype(isgreaterequal((double)0, (long double)0)), bool>::value), "");
654     static_assert((std::is_same<decltype(isgreaterequal((long double)0, (float)0)), bool>::value), "");
655     static_assert((std::is_same<decltype(isgreaterequal((long double)0, (double)0)), bool>::value), "");
656     static_assert((std::is_same<decltype(isgreaterequal((long double)0, (long double)0)), bool>::value), "");
657     static_assert((std::is_same<decltype(isgreaterequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
658     assert(isgreaterequal(-1.0, 0.F) == false);
659 }
660 
661 void test_isinf()
662 {
663 #ifdef isinf
664 #error isinf defined
665 #endif
666     static_assert((std::is_same<decltype(isinf((float)0)), bool>::value), "");
667 
668     typedef decltype(isinf((double)0)) DoubleRetType;
669 #ifndef __linux__
670     static_assert((std::is_same<DoubleRetType, bool>::value), "");
671 #else
672     // GLIBC < 2.26 defines 'isinf(double)' with a return type of 'int' in
673     // all C++ dialects. The test should tolerate this.
674     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
675     static_assert((std::is_same<DoubleRetType, bool>::value
676                 || std::is_same<DoubleRetType, int>::value), "");
677 #endif
678 
679     static_assert((std::is_same<decltype(isinf(0)), bool>::value), "");
680     static_assert((std::is_same<decltype(isinf((long double)0)), bool>::value), "");
681     assert(isinf(-1.0) == false);
682 }
683 
684 void test_isless()
685 {
686 #ifdef isless
687 #error isless defined
688 #endif
689     static_assert((std::is_same<decltype(isless((float)0, (float)0)), bool>::value), "");
690     static_assert((std::is_same<decltype(isless((float)0, (double)0)), bool>::value), "");
691     static_assert((std::is_same<decltype(isless((float)0, (long double)0)), bool>::value), "");
692     static_assert((std::is_same<decltype(isless((double)0, (float)0)), bool>::value), "");
693     static_assert((std::is_same<decltype(isless((double)0, (double)0)), bool>::value), "");
694     static_assert((std::is_same<decltype(isless(0, (double)0)), bool>::value), "");
695     static_assert((std::is_same<decltype(isless((double)0, (long double)0)), bool>::value), "");
696     static_assert((std::is_same<decltype(isless((long double)0, (float)0)), bool>::value), "");
697     static_assert((std::is_same<decltype(isless((long double)0, (double)0)), bool>::value), "");
698     static_assert((std::is_same<decltype(isless((long double)0, (long double)0)), bool>::value), "");
699     static_assert((std::is_same<decltype(isless(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
700     assert(isless(-1.0, 0.F) == true);
701 }
702 
703 void test_islessequal()
704 {
705 #ifdef islessequal
706 #error islessequal defined
707 #endif
708     static_assert((std::is_same<decltype(islessequal((float)0, (float)0)), bool>::value), "");
709     static_assert((std::is_same<decltype(islessequal((float)0, (double)0)), bool>::value), "");
710     static_assert((std::is_same<decltype(islessequal((float)0, (long double)0)), bool>::value), "");
711     static_assert((std::is_same<decltype(islessequal((double)0, (float)0)), bool>::value), "");
712     static_assert((std::is_same<decltype(islessequal((double)0, (double)0)), bool>::value), "");
713     static_assert((std::is_same<decltype(islessequal(0, (double)0)), bool>::value), "");
714     static_assert((std::is_same<decltype(islessequal((double)0, (long double)0)), bool>::value), "");
715     static_assert((std::is_same<decltype(islessequal((long double)0, (float)0)), bool>::value), "");
716     static_assert((std::is_same<decltype(islessequal((long double)0, (double)0)), bool>::value), "");
717     static_assert((std::is_same<decltype(islessequal((long double)0, (long double)0)), bool>::value), "");
718     static_assert((std::is_same<decltype(islessequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
719     assert(islessequal(-1.0, 0.F) == true);
720 }
721 
722 void test_islessgreater()
723 {
724 #ifdef islessgreater
725 #error islessgreater defined
726 #endif
727     static_assert((std::is_same<decltype(islessgreater((float)0, (float)0)), bool>::value), "");
728     static_assert((std::is_same<decltype(islessgreater((float)0, (double)0)), bool>::value), "");
729     static_assert((std::is_same<decltype(islessgreater((float)0, (long double)0)), bool>::value), "");
730     static_assert((std::is_same<decltype(islessgreater((double)0, (float)0)), bool>::value), "");
731     static_assert((std::is_same<decltype(islessgreater((double)0, (double)0)), bool>::value), "");
732     static_assert((std::is_same<decltype(islessgreater(0, (double)0)), bool>::value), "");
733     static_assert((std::is_same<decltype(islessgreater((double)0, (long double)0)), bool>::value), "");
734     static_assert((std::is_same<decltype(islessgreater((long double)0, (float)0)), bool>::value), "");
735     static_assert((std::is_same<decltype(islessgreater((long double)0, (double)0)), bool>::value), "");
736     static_assert((std::is_same<decltype(islessgreater((long double)0, (long double)0)), bool>::value), "");
737     static_assert((std::is_same<decltype(islessgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
738     assert(islessgreater(-1.0, 0.F) == true);
739 }
740 
741 void test_isnan()
742 {
743 #ifdef isnan
744 #error isnan defined
745 #endif
746     static_assert((std::is_same<decltype(isnan((float)0)), bool>::value), "");
747 
748     typedef decltype(isnan((double)0)) DoubleRetType;
749 #ifndef __linux__
750     static_assert((std::is_same<DoubleRetType, bool>::value), "");
751 #else
752     // GLIBC < 2.26 defines 'isnan(double)' with a return type of 'int' in
753     // all C++ dialects. The test should tolerate this.
754     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
755     static_assert((std::is_same<DoubleRetType, bool>::value
756                 || std::is_same<DoubleRetType, int>::value), "");
757 #endif
758 
759     static_assert((std::is_same<decltype(isnan(0)), bool>::value), "");
760     static_assert((std::is_same<decltype(isnan((long double)0)), bool>::value), "");
761     assert(isnan(-1.0) == false);
762 }
763 
764 void test_isunordered()
765 {
766 #ifdef isunordered
767 #error isunordered defined
768 #endif
769     static_assert((std::is_same<decltype(isunordered((float)0, (float)0)), bool>::value), "");
770     static_assert((std::is_same<decltype(isunordered((float)0, (double)0)), bool>::value), "");
771     static_assert((std::is_same<decltype(isunordered((float)0, (long double)0)), bool>::value), "");
772     static_assert((std::is_same<decltype(isunordered((double)0, (float)0)), bool>::value), "");
773     static_assert((std::is_same<decltype(isunordered((double)0, (double)0)), bool>::value), "");
774     static_assert((std::is_same<decltype(isunordered(0, (double)0)), bool>::value), "");
775     static_assert((std::is_same<decltype(isunordered((double)0, (long double)0)), bool>::value), "");
776     static_assert((std::is_same<decltype(isunordered((long double)0, (float)0)), bool>::value), "");
777     static_assert((std::is_same<decltype(isunordered((long double)0, (double)0)), bool>::value), "");
778     static_assert((std::is_same<decltype(isunordered((long double)0, (long double)0)), bool>::value), "");
779     static_assert((std::is_same<decltype(isunordered(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
780     assert(isunordered(-1.0, 0.F) == false);
781 }
782 
783 void test_acosh()
784 {
785     static_assert((std::is_same<decltype(acosh((float)0)), float>::value), "");
786     static_assert((std::is_same<decltype(acosh((bool)0)), double>::value), "");
787     static_assert((std::is_same<decltype(acosh((unsigned short)0)), double>::value), "");
788     static_assert((std::is_same<decltype(acosh((int)0)), double>::value), "");
789     static_assert((std::is_same<decltype(acosh((unsigned int)0)), double>::value), "");
790     static_assert((std::is_same<decltype(acosh((long)0)), double>::value), "");
791     static_assert((std::is_same<decltype(acosh((unsigned long)0)), double>::value), "");
792     static_assert((std::is_same<decltype(acosh((long long)0)), double>::value), "");
793     static_assert((std::is_same<decltype(acosh((unsigned long long)0)), double>::value), "");
794     static_assert((std::is_same<decltype(acosh((double)0)), double>::value), "");
795     static_assert((std::is_same<decltype(acosh((long double)0)), long double>::value), "");
796     static_assert((std::is_same<decltype(acoshf(0)), float>::value), "");
797     static_assert((std::is_same<decltype(acoshl(0)), long double>::value), "");
798     static_assert((std::is_same<decltype(acosh(Ambiguous())), Ambiguous>::value), "");
799     assert(acosh(1) == 0);
800 }
801 
802 void test_asinh()
803 {
804     static_assert((std::is_same<decltype(asinh((float)0)), float>::value), "");
805     static_assert((std::is_same<decltype(asinh((bool)0)), double>::value), "");
806     static_assert((std::is_same<decltype(asinh((unsigned short)0)), double>::value), "");
807     static_assert((std::is_same<decltype(asinh((int)0)), double>::value), "");
808     static_assert((std::is_same<decltype(asinh((unsigned int)0)), double>::value), "");
809     static_assert((std::is_same<decltype(asinh((long)0)), double>::value), "");
810     static_assert((std::is_same<decltype(asinh((unsigned long)0)), double>::value), "");
811     static_assert((std::is_same<decltype(asinh((long long)0)), double>::value), "");
812     static_assert((std::is_same<decltype(asinh((unsigned long long)0)), double>::value), "");
813     static_assert((std::is_same<decltype(asinh((double)0)), double>::value), "");
814     static_assert((std::is_same<decltype(asinh((long double)0)), long double>::value), "");
815     static_assert((std::is_same<decltype(asinhf(0)), float>::value), "");
816     static_assert((std::is_same<decltype(asinhl(0)), long double>::value), "");
817     static_assert((std::is_same<decltype(asinh(Ambiguous())), Ambiguous>::value), "");
818     assert(asinh(0) == 0);
819 }
820 
821 void test_atanh()
822 {
823     static_assert((std::is_same<decltype(atanh((float)0)), float>::value), "");
824     static_assert((std::is_same<decltype(atanh((bool)0)), double>::value), "");
825     static_assert((std::is_same<decltype(atanh((unsigned short)0)), double>::value), "");
826     static_assert((std::is_same<decltype(atanh((int)0)), double>::value), "");
827     static_assert((std::is_same<decltype(atanh((unsigned int)0)), double>::value), "");
828     static_assert((std::is_same<decltype(atanh((long)0)), double>::value), "");
829     static_assert((std::is_same<decltype(atanh((unsigned long)0)), double>::value), "");
830     static_assert((std::is_same<decltype(atanh((long long)0)), double>::value), "");
831     static_assert((std::is_same<decltype(atanh((unsigned long long)0)), double>::value), "");
832     static_assert((std::is_same<decltype(atanh((double)0)), double>::value), "");
833     static_assert((std::is_same<decltype(atanh((long double)0)), long double>::value), "");
834     static_assert((std::is_same<decltype(atanhf(0)), float>::value), "");
835     static_assert((std::is_same<decltype(atanhl(0)), long double>::value), "");
836     static_assert((std::is_same<decltype(atanh(Ambiguous())), Ambiguous>::value), "");
837     assert(atanh(0) == 0);
838 }
839 
840 void test_cbrt() {
841     static_assert((std::is_same<decltype(cbrt((float) 0)), float>::value), "");
842     static_assert((std::is_same<decltype(cbrt((bool) 0)), double>::value), "");
843     static_assert((std::is_same<decltype(cbrt((unsigned short) 0)),
844                                 double>::value), "");
845     static_assert((std::is_same<decltype(cbrt((int) 0)), double>::value), "");
846     static_assert((std::is_same<decltype(cbrt((unsigned int) 0)),
847                                 double>::value), "");
848     static_assert((std::is_same<decltype(cbrt((long) 0)), double>::value), "");
849     static_assert((std::is_same<decltype(cbrt((unsigned long) 0)),
850                                 double>::value), "");
851     static_assert((std::is_same<decltype(cbrt((long long) 0)), double>::value),
852                   "");
853     static_assert((std::is_same<decltype(cbrt((unsigned long long) 0)),
854                                 double>::value), "");
855     static_assert((std::is_same<decltype(cbrt((double) 0)), double>::value),
856                   "");
857     static_assert((std::is_same<decltype(cbrt((long double) 0)),
858                                 long double>::value), "");
859     static_assert((std::is_same<decltype(cbrtf(0)), float>::value), "");
860     static_assert((std::is_same<decltype(cbrtl(0)), long double>::value), "");
861     static_assert((std::is_same<decltype(cbrt(Ambiguous())), Ambiguous>::value),
862                   "");
863     assert(truncate_fp(cbrt(1)) == 1);
864 
865 }
866 
867 void test_copysign()
868 {
869     static_assert((std::is_same<decltype(copysign((float)0, (float)0)), float>::value), "");
870     static_assert((std::is_same<decltype(copysign((bool)0, (float)0)), double>::value), "");
871     static_assert((std::is_same<decltype(copysign((unsigned short)0, (double)0)), double>::value), "");
872     static_assert((std::is_same<decltype(copysign((int)0, (long double)0)), long double>::value), "");
873     static_assert((std::is_same<decltype(copysign((float)0, (unsigned int)0)), double>::value), "");
874     static_assert((std::is_same<decltype(copysign((double)0, (long)0)), double>::value), "");
875     static_assert((std::is_same<decltype(copysign((long double)0, (unsigned long)0)), long double>::value), "");
876     static_assert((std::is_same<decltype(copysign((int)0, (long long)0)), double>::value), "");
877     static_assert((std::is_same<decltype(copysign((int)0, (unsigned long long)0)), double>::value), "");
878     static_assert((std::is_same<decltype(copysign((double)0, (double)0)), double>::value), "");
879     static_assert((std::is_same<decltype(copysign((long double)0, (long double)0)), long double>::value), "");
880     static_assert((std::is_same<decltype(copysign((float)0, (double)0)), double>::value), "");
881     static_assert((std::is_same<decltype(copysign((float)0, (long double)0)), long double>::value), "");
882     static_assert((std::is_same<decltype(copysign((double)0, (long double)0)), long double>::value), "");
883     static_assert((std::is_same<decltype(copysignf(0,0)), float>::value), "");
884     static_assert((std::is_same<decltype(copysignl(0,0)), long double>::value), "");
885     static_assert((std::is_same<decltype(copysign((int)0, (int)0)), double>::value), "");
886     static_assert((std::is_same<decltype(copysign(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
887     assert(copysign(1,1) == 1);
888 }
889 
890 void test_erf()
891 {
892     static_assert((std::is_same<decltype(erf((float)0)), float>::value), "");
893     static_assert((std::is_same<decltype(erf((bool)0)), double>::value), "");
894     static_assert((std::is_same<decltype(erf((unsigned short)0)), double>::value), "");
895     static_assert((std::is_same<decltype(erf((int)0)), double>::value), "");
896     static_assert((std::is_same<decltype(erf((unsigned int)0)), double>::value), "");
897     static_assert((std::is_same<decltype(erf((long)0)), double>::value), "");
898     static_assert((std::is_same<decltype(erf((unsigned long)0)), double>::value), "");
899     static_assert((std::is_same<decltype(erf((long long)0)), double>::value), "");
900     static_assert((std::is_same<decltype(erf((unsigned long long)0)), double>::value), "");
901     static_assert((std::is_same<decltype(erf((double)0)), double>::value), "");
902     static_assert((std::is_same<decltype(erf((long double)0)), long double>::value), "");
903     static_assert((std::is_same<decltype(erff(0)), float>::value), "");
904     static_assert((std::is_same<decltype(erfl(0)), long double>::value), "");
905     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");
906     assert(erf(0) == 0);
907 }
908 
909 void test_erfc()
910 {
911     static_assert((std::is_same<decltype(erfc((float)0)), float>::value), "");
912     static_assert((std::is_same<decltype(erfc((bool)0)), double>::value), "");
913     static_assert((std::is_same<decltype(erfc((unsigned short)0)), double>::value), "");
914     static_assert((std::is_same<decltype(erfc((int)0)), double>::value), "");
915     static_assert((std::is_same<decltype(erfc((unsigned int)0)), double>::value), "");
916     static_assert((std::is_same<decltype(erfc((long)0)), double>::value), "");
917     static_assert((std::is_same<decltype(erfc((unsigned long)0)), double>::value), "");
918     static_assert((std::is_same<decltype(erfc((long long)0)), double>::value), "");
919     static_assert((std::is_same<decltype(erfc((unsigned long long)0)), double>::value), "");
920     static_assert((std::is_same<decltype(erfc((double)0)), double>::value), "");
921     static_assert((std::is_same<decltype(erfc((long double)0)), long double>::value), "");
922     static_assert((std::is_same<decltype(erfcf(0)), float>::value), "");
923     static_assert((std::is_same<decltype(erfcl(0)), long double>::value), "");
924     static_assert((std::is_same<decltype(erfc(Ambiguous())), Ambiguous>::value), "");
925     assert(erfc(0) == 1);
926 }
927 
928 void test_exp2()
929 {
930     static_assert((std::is_same<decltype(exp2((float)0)), float>::value), "");
931     static_assert((std::is_same<decltype(exp2((bool)0)), double>::value), "");
932     static_assert((std::is_same<decltype(exp2((unsigned short)0)), double>::value), "");
933     static_assert((std::is_same<decltype(exp2((int)0)), double>::value), "");
934     static_assert((std::is_same<decltype(exp2((unsigned int)0)), double>::value), "");
935     static_assert((std::is_same<decltype(exp2((long)0)), double>::value), "");
936     static_assert((std::is_same<decltype(exp2((unsigned long)0)), double>::value), "");
937     static_assert((std::is_same<decltype(exp2((long long)0)), double>::value), "");
938     static_assert((std::is_same<decltype(exp2((unsigned long long)0)), double>::value), "");
939     static_assert((std::is_same<decltype(exp2((double)0)), double>::value), "");
940     static_assert((std::is_same<decltype(exp2((long double)0)), long double>::value), "");
941     static_assert((std::is_same<decltype(exp2f(0)), float>::value), "");
942     static_assert((std::is_same<decltype(exp2l(0)), long double>::value), "");
943     static_assert((std::is_same<decltype(exp2(Ambiguous())), Ambiguous>::value), "");
944     assert(exp2(1) == 2);
945 }
946 
947 void test_expm1()
948 {
949     static_assert((std::is_same<decltype(expm1((float)0)), float>::value), "");
950     static_assert((std::is_same<decltype(expm1((bool)0)), double>::value), "");
951     static_assert((std::is_same<decltype(expm1((unsigned short)0)), double>::value), "");
952     static_assert((std::is_same<decltype(expm1((int)0)), double>::value), "");
953     static_assert((std::is_same<decltype(expm1((unsigned int)0)), double>::value), "");
954     static_assert((std::is_same<decltype(expm1((long)0)), double>::value), "");
955     static_assert((std::is_same<decltype(expm1((unsigned long)0)), double>::value), "");
956     static_assert((std::is_same<decltype(expm1((long long)0)), double>::value), "");
957     static_assert((std::is_same<decltype(expm1((unsigned long long)0)), double>::value), "");
958     static_assert((std::is_same<decltype(expm1((double)0)), double>::value), "");
959     static_assert((std::is_same<decltype(expm1((long double)0)), long double>::value), "");
960     static_assert((std::is_same<decltype(expm1f(0)), float>::value), "");
961     static_assert((std::is_same<decltype(expm1l(0)), long double>::value), "");
962     static_assert((std::is_same<decltype(expm1(Ambiguous())), Ambiguous>::value), "");
963     assert(expm1(0) == 0);
964 }
965 
966 void test_fdim()
967 {
968     static_assert((std::is_same<decltype(fdim((float)0, (float)0)), float>::value), "");
969     static_assert((std::is_same<decltype(fdim((bool)0, (float)0)), double>::value), "");
970     static_assert((std::is_same<decltype(fdim((unsigned short)0, (double)0)), double>::value), "");
971     static_assert((std::is_same<decltype(fdim((int)0, (long double)0)), long double>::value), "");
972     static_assert((std::is_same<decltype(fdim((float)0, (unsigned int)0)), double>::value), "");
973     static_assert((std::is_same<decltype(fdim((double)0, (long)0)), double>::value), "");
974     static_assert((std::is_same<decltype(fdim((long double)0, (unsigned long)0)), long double>::value), "");
975     static_assert((std::is_same<decltype(fdim((int)0, (long long)0)), double>::value), "");
976     static_assert((std::is_same<decltype(fdim((int)0, (unsigned long long)0)), double>::value), "");
977     static_assert((std::is_same<decltype(fdim((double)0, (double)0)), double>::value), "");
978     static_assert((std::is_same<decltype(fdim((long double)0, (long double)0)), long double>::value), "");
979     static_assert((std::is_same<decltype(fdim((float)0, (double)0)), double>::value), "");
980     static_assert((std::is_same<decltype(fdim((float)0, (long double)0)), long double>::value), "");
981     static_assert((std::is_same<decltype(fdim((double)0, (long double)0)), long double>::value), "");
982     static_assert((std::is_same<decltype(fdimf(0,0)), float>::value), "");
983     static_assert((std::is_same<decltype(fdiml(0,0)), long double>::value), "");
984     static_assert((std::is_same<decltype(fdim((int)0, (int)0)), double>::value), "");
985     static_assert((std::is_same<decltype(fdim(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
986     assert(fdim(1,0) == 1);
987 }
988 
989 void test_fma()
990 {
991     static_assert((std::is_same<decltype(fma((bool)0, (float)0, (float)0)), double>::value), "");
992     static_assert((std::is_same<decltype(fma((char)0, (float)0, (float)0)), double>::value), "");
993     static_assert((std::is_same<decltype(fma((unsigned)0, (float)0, (float)0)), double>::value), "");
994     static_assert((std::is_same<decltype(fma((float)0, (int)0, (float)0)), double>::value), "");
995     static_assert((std::is_same<decltype(fma((float)0, (long)0, (float)0)), double>::value), "");
996     static_assert((std::is_same<decltype(fma((float)0, (float)0, (unsigned long long)0)), double>::value), "");
997     static_assert((std::is_same<decltype(fma((float)0, (float)0, (double)0)), double>::value), "");
998     static_assert((std::is_same<decltype(fma((float)0, (float)0, (long double)0)), long double>::value), "");
999     static_assert((std::is_same<decltype(fma((float)0, (float)0, (float)0)), float>::value), "");
1000 
1001     static_assert((std::is_same<decltype(fma((bool)0, (double)0, (double)0)), double>::value), "");
1002     static_assert((std::is_same<decltype(fma((char)0, (double)0, (double)0)), double>::value), "");
1003     static_assert((std::is_same<decltype(fma((unsigned)0, (double)0, (double)0)), double>::value), "");
1004     static_assert((std::is_same<decltype(fma((double)0, (int)0, (double)0)), double>::value), "");
1005     static_assert((std::is_same<decltype(fma((double)0, (long)0, (double)0)), double>::value), "");
1006     static_assert((std::is_same<decltype(fma((double)0, (double)0, (unsigned long long)0)), double>::value), "");
1007     static_assert((std::is_same<decltype(fma((double)0, (double)0, (float)0)), double>::value), "");
1008     static_assert((std::is_same<decltype(fma((double)0, (double)0, (long double)0)), long double>::value), "");
1009     static_assert((std::is_same<decltype(fma((double)0, (double)0,  (double)0)), double>::value), "");
1010 
1011     static_assert((std::is_same<decltype(fma((bool)0, (long double)0, (long double)0)), long double>::value), "");
1012     static_assert((std::is_same<decltype(fma((char)0, (long double)0, (long double)0)), long double>::value), "");
1013     static_assert((std::is_same<decltype(fma((unsigned)0, (long double)0, (long double)0)), long double>::value), "");
1014     static_assert((std::is_same<decltype(fma((long double)0, (int)0, (long double)0)), long double>::value), "");
1015     static_assert((std::is_same<decltype(fma((long double)0, (long)0, (long double)0)), long double>::value), "");
1016     static_assert((std::is_same<decltype(fma((long double)0, (long double)0, (unsigned long long)0)), long double>::value), "");
1017     static_assert((std::is_same<decltype(fma((long double)0, (long double)0, (float)0)), long double>::value), "");
1018     static_assert((std::is_same<decltype(fma((double)0, (long double)0, (long double)0)), long double>::value), "");
1019     static_assert((std::is_same<decltype(fma((long double)0, (long double)0, (long double)0)), long double>::value), "");
1020 
1021     static_assert((std::is_same<decltype(fmaf(0,0,0)), float>::value), "");
1022     static_assert((std::is_same<decltype(fmal(0,0,0)), long double>::value), "");
1023     static_assert((std::is_same<decltype(fma(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1024     assert(fma(1,1,1) == 2);
1025 }
1026 
1027 void test_fmax()
1028 {
1029     static_assert((std::is_same<decltype(fmax((float)0, (float)0)), float>::value), "");
1030     static_assert((std::is_same<decltype(fmax((bool)0, (float)0)), double>::value), "");
1031     static_assert((std::is_same<decltype(fmax((unsigned short)0, (double)0)), double>::value), "");
1032     static_assert((std::is_same<decltype(fmax((int)0, (long double)0)), long double>::value), "");
1033     static_assert((std::is_same<decltype(fmax((float)0, (unsigned int)0)), double>::value), "");
1034     static_assert((std::is_same<decltype(fmax((double)0, (long)0)), double>::value), "");
1035     static_assert((std::is_same<decltype(fmax((long double)0, (unsigned long)0)), long double>::value), "");
1036     static_assert((std::is_same<decltype(fmax((int)0, (long long)0)), double>::value), "");
1037     static_assert((std::is_same<decltype(fmax((int)0, (unsigned long long)0)), double>::value), "");
1038     static_assert((std::is_same<decltype(fmax((double)0, (double)0)), double>::value), "");
1039     static_assert((std::is_same<decltype(fmax((long double)0, (long double)0)), long double>::value), "");
1040     static_assert((std::is_same<decltype(fmax((float)0, (double)0)), double>::value), "");
1041     static_assert((std::is_same<decltype(fmax((float)0, (long double)0)), long double>::value), "");
1042     static_assert((std::is_same<decltype(fmax((double)0, (long double)0)), long double>::value), "");
1043     static_assert((std::is_same<decltype(fmaxf(0,0)), float>::value), "");
1044     static_assert((std::is_same<decltype(fmaxl(0,0)), long double>::value), "");
1045     static_assert((std::is_same<decltype(fmax((int)0, (int)0)), double>::value), "");
1046     static_assert((std::is_same<decltype(fmax(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1047     assert(fmax(1,0) == 1);
1048 }
1049 
1050 void test_fmin()
1051 {
1052     static_assert((std::is_same<decltype(fmin((float)0, (float)0)), float>::value), "");
1053     static_assert((std::is_same<decltype(fmin((bool)0, (float)0)), double>::value), "");
1054     static_assert((std::is_same<decltype(fmin((unsigned short)0, (double)0)), double>::value), "");
1055     static_assert((std::is_same<decltype(fmin((int)0, (long double)0)), long double>::value), "");
1056     static_assert((std::is_same<decltype(fmin((float)0, (unsigned int)0)), double>::value), "");
1057     static_assert((std::is_same<decltype(fmin((double)0, (long)0)), double>::value), "");
1058     static_assert((std::is_same<decltype(fmin((long double)0, (unsigned long)0)), long double>::value), "");
1059     static_assert((std::is_same<decltype(fmin((int)0, (long long)0)), double>::value), "");
1060     static_assert((std::is_same<decltype(fmin((int)0, (unsigned long long)0)), double>::value), "");
1061     static_assert((std::is_same<decltype(fmin((double)0, (double)0)), double>::value), "");
1062     static_assert((std::is_same<decltype(fmin((long double)0, (long double)0)), long double>::value), "");
1063     static_assert((std::is_same<decltype(fmin((float)0, (double)0)), double>::value), "");
1064     static_assert((std::is_same<decltype(fmin((float)0, (long double)0)), long double>::value), "");
1065     static_assert((std::is_same<decltype(fmin((double)0, (long double)0)), long double>::value), "");
1066     static_assert((std::is_same<decltype(fminf(0,0)), float>::value), "");
1067     static_assert((std::is_same<decltype(fminl(0,0)), long double>::value), "");
1068     static_assert((std::is_same<decltype(fmin((int)0, (int)0)), double>::value), "");
1069     static_assert((std::is_same<decltype(fmin(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1070     assert(fmin(1,0) == 0);
1071 }
1072 
1073 void test_hypot()
1074 {
1075     static_assert((std::is_same<decltype(hypot((float)0, (float)0)), float>::value), "");
1076     static_assert((std::is_same<decltype(hypot((bool)0, (float)0)), double>::value), "");
1077     static_assert((std::is_same<decltype(hypot((unsigned short)0, (double)0)), double>::value), "");
1078     static_assert((std::is_same<decltype(hypot((int)0, (long double)0)), long double>::value), "");
1079     static_assert((std::is_same<decltype(hypot((float)0, (unsigned int)0)), double>::value), "");
1080     static_assert((std::is_same<decltype(hypot((double)0, (long)0)), double>::value), "");
1081     static_assert((std::is_same<decltype(hypot((long double)0, (unsigned long)0)), long double>::value), "");
1082     static_assert((std::is_same<decltype(hypot((int)0, (long long)0)), double>::value), "");
1083     static_assert((std::is_same<decltype(hypot((int)0, (unsigned long long)0)), double>::value), "");
1084     static_assert((std::is_same<decltype(hypot((double)0, (double)0)), double>::value), "");
1085     static_assert((std::is_same<decltype(hypot((long double)0, (long double)0)), long double>::value), "");
1086     static_assert((std::is_same<decltype(hypot((float)0, (double)0)), double>::value), "");
1087     static_assert((std::is_same<decltype(hypot((float)0, (long double)0)), long double>::value), "");
1088     static_assert((std::is_same<decltype(hypot((double)0, (long double)0)), long double>::value), "");
1089     static_assert((std::is_same<decltype(hypotf(0,0)), float>::value), "");
1090     static_assert((std::is_same<decltype(hypotl(0,0)), long double>::value), "");
1091     static_assert((std::is_same<decltype(hypot((int)0, (int)0)), double>::value), "");
1092     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1093     assert(hypot(3,4) == 5);
1094 }
1095 
1096 void test_ilogb()
1097 {
1098     static_assert((std::is_same<decltype(ilogb((float)0)), int>::value), "");
1099     static_assert((std::is_same<decltype(ilogb((bool)0)), int>::value), "");
1100     static_assert((std::is_same<decltype(ilogb((unsigned short)0)), int>::value), "");
1101     static_assert((std::is_same<decltype(ilogb((int)0)), int>::value), "");
1102     static_assert((std::is_same<decltype(ilogb((unsigned int)0)), int>::value), "");
1103     static_assert((std::is_same<decltype(ilogb((long)0)), int>::value), "");
1104     static_assert((std::is_same<decltype(ilogb((unsigned long)0)), int>::value), "");
1105     static_assert((std::is_same<decltype(ilogb((long long)0)), int>::value), "");
1106     static_assert((std::is_same<decltype(ilogb((unsigned long long)0)), int>::value), "");
1107     static_assert((std::is_same<decltype(ilogb((double)0)), int>::value), "");
1108     static_assert((std::is_same<decltype(ilogb((long double)0)), int>::value), "");
1109     static_assert((std::is_same<decltype(ilogbf(0)), int>::value), "");
1110     static_assert((std::is_same<decltype(ilogbl(0)), int>::value), "");
1111     static_assert((std::is_same<decltype(ilogb(Ambiguous())), Ambiguous>::value), "");
1112     assert(ilogb(1) == 0);
1113 }
1114 
1115 void test_lgamma()
1116 {
1117     static_assert((std::is_same<decltype(lgamma((float)0)), float>::value), "");
1118     static_assert((std::is_same<decltype(lgamma((bool)0)), double>::value), "");
1119     static_assert((std::is_same<decltype(lgamma((unsigned short)0)), double>::value), "");
1120     static_assert((std::is_same<decltype(lgamma((int)0)), double>::value), "");
1121     static_assert((std::is_same<decltype(lgamma((unsigned int)0)), double>::value), "");
1122     static_assert((std::is_same<decltype(lgamma((long)0)), double>::value), "");
1123     static_assert((std::is_same<decltype(lgamma((unsigned long)0)), double>::value), "");
1124     static_assert((std::is_same<decltype(lgamma((long long)0)), double>::value), "");
1125     static_assert((std::is_same<decltype(lgamma((unsigned long long)0)), double>::value), "");
1126     static_assert((std::is_same<decltype(lgamma((double)0)), double>::value), "");
1127     static_assert((std::is_same<decltype(lgamma((long double)0)), long double>::value), "");
1128     static_assert((std::is_same<decltype(lgammaf(0)), float>::value), "");
1129     static_assert((std::is_same<decltype(lgammal(0)), long double>::value), "");
1130     static_assert((std::is_same<decltype(lgamma(Ambiguous())), Ambiguous>::value), "");
1131     assert(lgamma(1) == 0);
1132 }
1133 
1134 void test_llrint()
1135 {
1136     static_assert((std::is_same<decltype(llrint((float)0)), long long>::value), "");
1137     static_assert((std::is_same<decltype(llrint((bool)0)), long long>::value), "");
1138     static_assert((std::is_same<decltype(llrint((unsigned short)0)), long long>::value), "");
1139     static_assert((std::is_same<decltype(llrint((int)0)), long long>::value), "");
1140     static_assert((std::is_same<decltype(llrint((unsigned int)0)), long long>::value), "");
1141     static_assert((std::is_same<decltype(llrint((long)0)), long long>::value), "");
1142     static_assert((std::is_same<decltype(llrint((unsigned long)0)), long long>::value), "");
1143     static_assert((std::is_same<decltype(llrint((long long)0)), long long>::value), "");
1144     static_assert((std::is_same<decltype(llrint((unsigned long long)0)), long long>::value), "");
1145     static_assert((std::is_same<decltype(llrint((double)0)), long long>::value), "");
1146     static_assert((std::is_same<decltype(llrint((long double)0)), long long>::value), "");
1147     static_assert((std::is_same<decltype(llrintf(0)), long long>::value), "");
1148     static_assert((std::is_same<decltype(llrintl(0)), long long>::value), "");
1149     static_assert((std::is_same<decltype(llrint(Ambiguous())), Ambiguous>::value), "");
1150     assert(llrint(1) == 1LL);
1151 }
1152 
1153 void test_llround()
1154 {
1155     static_assert((std::is_same<decltype(llround((float)0)), long long>::value), "");
1156     static_assert((std::is_same<decltype(llround((bool)0)), long long>::value), "");
1157     static_assert((std::is_same<decltype(llround((unsigned short)0)), long long>::value), "");
1158     static_assert((std::is_same<decltype(llround((int)0)), long long>::value), "");
1159     static_assert((std::is_same<decltype(llround((unsigned int)0)), long long>::value), "");
1160     static_assert((std::is_same<decltype(llround((long)0)), long long>::value), "");
1161     static_assert((std::is_same<decltype(llround((unsigned long)0)), long long>::value), "");
1162     static_assert((std::is_same<decltype(llround((long long)0)), long long>::value), "");
1163     static_assert((std::is_same<decltype(llround((unsigned long long)0)), long long>::value), "");
1164     static_assert((std::is_same<decltype(llround((double)0)), long long>::value), "");
1165     static_assert((std::is_same<decltype(llround((long double)0)), long long>::value), "");
1166     static_assert((std::is_same<decltype(llroundf(0)), long long>::value), "");
1167     static_assert((std::is_same<decltype(llroundl(0)), long long>::value), "");
1168     static_assert((std::is_same<decltype(llround(Ambiguous())), Ambiguous>::value), "");
1169     assert(llround(1) == 1LL);
1170 }
1171 
1172 void test_log1p()
1173 {
1174     static_assert((std::is_same<decltype(log1p((float)0)), float>::value), "");
1175     static_assert((std::is_same<decltype(log1p((bool)0)), double>::value), "");
1176     static_assert((std::is_same<decltype(log1p((unsigned short)0)), double>::value), "");
1177     static_assert((std::is_same<decltype(log1p((int)0)), double>::value), "");
1178     static_assert((std::is_same<decltype(log1p((unsigned int)0)), double>::value), "");
1179     static_assert((std::is_same<decltype(log1p((long)0)), double>::value), "");
1180     static_assert((std::is_same<decltype(log1p((unsigned long)0)), double>::value), "");
1181     static_assert((std::is_same<decltype(log1p((long long)0)), double>::value), "");
1182     static_assert((std::is_same<decltype(log1p((unsigned long long)0)), double>::value), "");
1183     static_assert((std::is_same<decltype(log1p((double)0)), double>::value), "");
1184     static_assert((std::is_same<decltype(log1p((long double)0)), long double>::value), "");
1185     static_assert((std::is_same<decltype(log1pf(0)), float>::value), "");
1186     static_assert((std::is_same<decltype(log1pl(0)), long double>::value), "");
1187     static_assert((std::is_same<decltype(log1p(Ambiguous())), Ambiguous>::value), "");
1188     assert(log1p(0) == 0);
1189 }
1190 
1191 void test_log2()
1192 {
1193     static_assert((std::is_same<decltype(log2((float)0)), float>::value), "");
1194     static_assert((std::is_same<decltype(log2((bool)0)), double>::value), "");
1195     static_assert((std::is_same<decltype(log2((unsigned short)0)), double>::value), "");
1196     static_assert((std::is_same<decltype(log2((int)0)), double>::value), "");
1197     static_assert((std::is_same<decltype(log2((unsigned int)0)), double>::value), "");
1198     static_assert((std::is_same<decltype(log2((long)0)), double>::value), "");
1199     static_assert((std::is_same<decltype(log2((unsigned long)0)), double>::value), "");
1200     static_assert((std::is_same<decltype(log2((long long)0)), double>::value), "");
1201     static_assert((std::is_same<decltype(log2((unsigned long long)0)), double>::value), "");
1202     static_assert((std::is_same<decltype(log2((double)0)), double>::value), "");
1203     static_assert((std::is_same<decltype(log2((long double)0)), long double>::value), "");
1204     static_assert((std::is_same<decltype(log2f(0)), float>::value), "");
1205     static_assert((std::is_same<decltype(log2l(0)), long double>::value), "");
1206     static_assert((std::is_same<decltype(log2(Ambiguous())), Ambiguous>::value), "");
1207     assert(log2(1) == 0);
1208 }
1209 
1210 void test_logb()
1211 {
1212     static_assert((std::is_same<decltype(logb((float)0)), float>::value), "");
1213     static_assert((std::is_same<decltype(logb((bool)0)), double>::value), "");
1214     static_assert((std::is_same<decltype(logb((unsigned short)0)), double>::value), "");
1215     static_assert((std::is_same<decltype(logb((int)0)), double>::value), "");
1216     static_assert((std::is_same<decltype(logb((unsigned int)0)), double>::value), "");
1217     static_assert((std::is_same<decltype(logb((long)0)), double>::value), "");
1218     static_assert((std::is_same<decltype(logb((unsigned long)0)), double>::value), "");
1219     static_assert((std::is_same<decltype(logb((long long)0)), double>::value), "");
1220     static_assert((std::is_same<decltype(logb((unsigned long long)0)), double>::value), "");
1221     static_assert((std::is_same<decltype(logb((double)0)), double>::value), "");
1222     static_assert((std::is_same<decltype(logb((long double)0)), long double>::value), "");
1223     static_assert((std::is_same<decltype(logbf(0)), float>::value), "");
1224     static_assert((std::is_same<decltype(logbl(0)), long double>::value), "");
1225     static_assert((std::is_same<decltype(logb(Ambiguous())), Ambiguous>::value), "");
1226     assert(logb(1) == 0);
1227 }
1228 
1229 void test_lrint()
1230 {
1231     static_assert((std::is_same<decltype(lrint((float)0)), long>::value), "");
1232     static_assert((std::is_same<decltype(lrint((bool)0)), long>::value), "");
1233     static_assert((std::is_same<decltype(lrint((unsigned short)0)), long>::value), "");
1234     static_assert((std::is_same<decltype(lrint((int)0)), long>::value), "");
1235     static_assert((std::is_same<decltype(lrint((unsigned int)0)), long>::value), "");
1236     static_assert((std::is_same<decltype(lrint((long)0)), long>::value), "");
1237     static_assert((std::is_same<decltype(lrint((unsigned long)0)), long>::value), "");
1238     static_assert((std::is_same<decltype(lrint((long long)0)), long>::value), "");
1239     static_assert((std::is_same<decltype(lrint((unsigned long long)0)), long>::value), "");
1240     static_assert((std::is_same<decltype(lrint((double)0)), long>::value), "");
1241     static_assert((std::is_same<decltype(lrint((long double)0)), long>::value), "");
1242     static_assert((std::is_same<decltype(lrintf(0)), long>::value), "");
1243     static_assert((std::is_same<decltype(lrintl(0)), long>::value), "");
1244     static_assert((std::is_same<decltype(lrint(Ambiguous())), Ambiguous>::value), "");
1245     assert(lrint(1) == 1L);
1246 }
1247 
1248 void test_lround()
1249 {
1250     static_assert((std::is_same<decltype(lround((float)0)), long>::value), "");
1251     static_assert((std::is_same<decltype(lround((bool)0)), long>::value), "");
1252     static_assert((std::is_same<decltype(lround((unsigned short)0)), long>::value), "");
1253     static_assert((std::is_same<decltype(lround((int)0)), long>::value), "");
1254     static_assert((std::is_same<decltype(lround((unsigned int)0)), long>::value), "");
1255     static_assert((std::is_same<decltype(lround((long)0)), long>::value), "");
1256     static_assert((std::is_same<decltype(lround((unsigned long)0)), long>::value), "");
1257     static_assert((std::is_same<decltype(lround((long long)0)), long>::value), "");
1258     static_assert((std::is_same<decltype(lround((unsigned long long)0)), long>::value), "");
1259     static_assert((std::is_same<decltype(lround((double)0)), long>::value), "");
1260     static_assert((std::is_same<decltype(lround((long double)0)), long>::value), "");
1261     static_assert((std::is_same<decltype(lroundf(0)), long>::value), "");
1262     static_assert((std::is_same<decltype(lroundl(0)), long>::value), "");
1263     static_assert((std::is_same<decltype(lround(Ambiguous())), Ambiguous>::value), "");
1264     assert(lround(1) == 1L);
1265 }
1266 
1267 void test_nan()
1268 {
1269     static_assert((std::is_same<decltype(nan("")), double>::value), "");
1270     static_assert((std::is_same<decltype(nanf("")), float>::value), "");
1271     static_assert((std::is_same<decltype(nanl("")), long double>::value), "");
1272 }
1273 
1274 void test_nearbyint()
1275 {
1276     static_assert((std::is_same<decltype(nearbyint((float)0)), float>::value), "");
1277     static_assert((std::is_same<decltype(nearbyint((bool)0)), double>::value), "");
1278     static_assert((std::is_same<decltype(nearbyint((unsigned short)0)), double>::value), "");
1279     static_assert((std::is_same<decltype(nearbyint((int)0)), double>::value), "");
1280     static_assert((std::is_same<decltype(nearbyint((unsigned int)0)), double>::value), "");
1281     static_assert((std::is_same<decltype(nearbyint((long)0)), double>::value), "");
1282     static_assert((std::is_same<decltype(nearbyint((unsigned long)0)), double>::value), "");
1283     static_assert((std::is_same<decltype(nearbyint((long long)0)), double>::value), "");
1284     static_assert((std::is_same<decltype(nearbyint((unsigned long long)0)), double>::value), "");
1285     static_assert((std::is_same<decltype(nearbyint((double)0)), double>::value), "");
1286     static_assert((std::is_same<decltype(nearbyint((long double)0)), long double>::value), "");
1287     static_assert((std::is_same<decltype(nearbyintf(0)), float>::value), "");
1288     static_assert((std::is_same<decltype(nearbyintl(0)), long double>::value), "");
1289     static_assert((std::is_same<decltype(nearbyint(Ambiguous())), Ambiguous>::value), "");
1290     assert(nearbyint(1) == 1);
1291 }
1292 
1293 void test_nextafter()
1294 {
1295     static_assert((std::is_same<decltype(nextafter((float)0, (float)0)), float>::value), "");
1296     static_assert((std::is_same<decltype(nextafter((bool)0, (float)0)), double>::value), "");
1297     static_assert((std::is_same<decltype(nextafter((unsigned short)0, (double)0)), double>::value), "");
1298     static_assert((std::is_same<decltype(nextafter((int)0, (long double)0)), long double>::value), "");
1299     static_assert((std::is_same<decltype(nextafter((float)0, (unsigned int)0)), double>::value), "");
1300     static_assert((std::is_same<decltype(nextafter((double)0, (long)0)), double>::value), "");
1301     static_assert((std::is_same<decltype(nextafter((long double)0, (unsigned long)0)), long double>::value), "");
1302     static_assert((std::is_same<decltype(nextafter((int)0, (long long)0)), double>::value), "");
1303     static_assert((std::is_same<decltype(nextafter((int)0, (unsigned long long)0)), double>::value), "");
1304     static_assert((std::is_same<decltype(nextafter((double)0, (double)0)), double>::value), "");
1305     static_assert((std::is_same<decltype(nextafter((long double)0, (long double)0)), long double>::value), "");
1306     static_assert((std::is_same<decltype(nextafter((float)0, (double)0)), double>::value), "");
1307     static_assert((std::is_same<decltype(nextafter((float)0, (long double)0)), long double>::value), "");
1308     static_assert((std::is_same<decltype(nextafter((double)0, (long double)0)), long double>::value), "");
1309     static_assert((std::is_same<decltype(nextafterf(0,0)), float>::value), "");
1310     static_assert((std::is_same<decltype(nextafterl(0,0)), long double>::value), "");
1311     static_assert((std::is_same<decltype(nextafter((int)0, (int)0)), double>::value), "");
1312     static_assert((std::is_same<decltype(nextafter(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1313     assert(nextafter(0,1) == hexfloat<double>(0x1, 0, -1074));
1314 }
1315 
1316 void test_nexttoward()
1317 {
1318     static_assert((std::is_same<decltype(nexttoward((float)0, (long double)0)), float>::value), "");
1319     static_assert((std::is_same<decltype(nexttoward((bool)0, (long double)0)), double>::value), "");
1320     static_assert((std::is_same<decltype(nexttoward((unsigned short)0, (long double)0)), double>::value), "");
1321     static_assert((std::is_same<decltype(nexttoward((int)0, (long double)0)), double>::value), "");
1322     static_assert((std::is_same<decltype(nexttoward((unsigned int)0, (long double)0)), double>::value), "");
1323     static_assert((std::is_same<decltype(nexttoward((long)0, (long double)0)), double>::value), "");
1324     static_assert((std::is_same<decltype(nexttoward((unsigned long)0, (long double)0)), double>::value), "");
1325     static_assert((std::is_same<decltype(nexttoward((long long)0, (long double)0)), double>::value), "");
1326     static_assert((std::is_same<decltype(nexttoward((unsigned long long)0, (long double)0)), double>::value), "");
1327     static_assert((std::is_same<decltype(nexttoward((double)0, (long double)0)), double>::value), "");
1328     static_assert((std::is_same<decltype(nexttoward((long double)0, (long double)0)), long double>::value), "");
1329     static_assert((std::is_same<decltype(nexttowardf(0, (long double)0)), float>::value), "");
1330     static_assert((std::is_same<decltype(nexttowardl(0, (long double)0)), long double>::value), "");
1331     static_assert((std::is_same<decltype(nexttoward(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1332     assert(nexttoward(0, 1) == hexfloat<double>(0x1, 0, -1074));
1333 }
1334 
1335 void test_remainder()
1336 {
1337     static_assert((std::is_same<decltype(remainder((float)0, (float)0)), float>::value), "");
1338     static_assert((std::is_same<decltype(remainder((bool)0, (float)0)), double>::value), "");
1339     static_assert((std::is_same<decltype(remainder((unsigned short)0, (double)0)), double>::value), "");
1340     static_assert((std::is_same<decltype(remainder((int)0, (long double)0)), long double>::value), "");
1341     static_assert((std::is_same<decltype(remainder((float)0, (unsigned int)0)), double>::value), "");
1342     static_assert((std::is_same<decltype(remainder((double)0, (long)0)), double>::value), "");
1343     static_assert((std::is_same<decltype(remainder((long double)0, (unsigned long)0)), long double>::value), "");
1344     static_assert((std::is_same<decltype(remainder((int)0, (long long)0)), double>::value), "");
1345     static_assert((std::is_same<decltype(remainder((int)0, (unsigned long long)0)), double>::value), "");
1346     static_assert((std::is_same<decltype(remainder((double)0, (double)0)), double>::value), "");
1347     static_assert((std::is_same<decltype(remainder((long double)0, (long double)0)), long double>::value), "");
1348     static_assert((std::is_same<decltype(remainder((float)0, (double)0)), double>::value), "");
1349     static_assert((std::is_same<decltype(remainder((float)0, (long double)0)), long double>::value), "");
1350     static_assert((std::is_same<decltype(remainder((double)0, (long double)0)), long double>::value), "");
1351     static_assert((std::is_same<decltype(remainderf(0,0)), float>::value), "");
1352     static_assert((std::is_same<decltype(remainderl(0,0)), long double>::value), "");
1353     static_assert((std::is_same<decltype(remainder((int)0, (int)0)), double>::value), "");
1354     static_assert((std::is_same<decltype(remainder(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1355     assert(remainder(0.5,1) == 0.5);
1356 }
1357 
1358 void test_remquo()
1359 {
1360     int ip;
1361     static_assert((std::is_same<decltype(remquo((float)0, (float)0, &ip)), float>::value), "");
1362     static_assert((std::is_same<decltype(remquo((bool)0, (float)0, &ip)), double>::value), "");
1363     static_assert((std::is_same<decltype(remquo((unsigned short)0, (double)0, &ip)), double>::value), "");
1364     static_assert((std::is_same<decltype(remquo((int)0, (long double)0, &ip)), long double>::value), "");
1365     static_assert((std::is_same<decltype(remquo((float)0, (unsigned int)0, &ip)), double>::value), "");
1366     static_assert((std::is_same<decltype(remquo((double)0, (long)0, &ip)), double>::value), "");
1367     static_assert((std::is_same<decltype(remquo((long double)0, (unsigned long)0, &ip)), long double>::value), "");
1368     static_assert((std::is_same<decltype(remquo((int)0, (long long)0, &ip)), double>::value), "");
1369     static_assert((std::is_same<decltype(remquo((int)0, (unsigned long long)0, &ip)), double>::value), "");
1370     static_assert((std::is_same<decltype(remquo((double)0, (double)0, &ip)), double>::value), "");
1371     static_assert((std::is_same<decltype(remquo((long double)0, (long double)0, &ip)), long double>::value), "");
1372     static_assert((std::is_same<decltype(remquo((float)0, (double)0, &ip)), double>::value), "");
1373     static_assert((std::is_same<decltype(remquo((float)0, (long double)0, &ip)), long double>::value), "");
1374     static_assert((std::is_same<decltype(remquo((double)0, (long double)0, &ip)), long double>::value), "");
1375     static_assert((std::is_same<decltype(remquof(0,0, &ip)), float>::value), "");
1376     static_assert((std::is_same<decltype(remquol(0,0, &ip)), long double>::value), "");
1377     static_assert((std::is_same<decltype(remquo((int)0, (int)0, &ip)), double>::value), "");
1378     static_assert((std::is_same<decltype(remquo(Ambiguous(), Ambiguous(), &ip)), Ambiguous>::value), "");
1379     assert(remquo(0.5,1, &ip) == 0.5);
1380 }
1381 
1382 void test_rint()
1383 {
1384     static_assert((std::is_same<decltype(rint((float)0)), float>::value), "");
1385     static_assert((std::is_same<decltype(rint((bool)0)), double>::value), "");
1386     static_assert((std::is_same<decltype(rint((unsigned short)0)), double>::value), "");
1387     static_assert((std::is_same<decltype(rint((int)0)), double>::value), "");
1388     static_assert((std::is_same<decltype(rint((unsigned int)0)), double>::value), "");
1389     static_assert((std::is_same<decltype(rint((long)0)), double>::value), "");
1390     static_assert((std::is_same<decltype(rint((unsigned long)0)), double>::value), "");
1391     static_assert((std::is_same<decltype(rint((long long)0)), double>::value), "");
1392     static_assert((std::is_same<decltype(rint((unsigned long long)0)), double>::value), "");
1393     static_assert((std::is_same<decltype(rint((double)0)), double>::value), "");
1394     static_assert((std::is_same<decltype(rint((long double)0)), long double>::value), "");
1395     static_assert((std::is_same<decltype(rintf(0)), float>::value), "");
1396     static_assert((std::is_same<decltype(rintl(0)), long double>::value), "");
1397     static_assert((std::is_same<decltype(rint(Ambiguous())), Ambiguous>::value), "");
1398     assert(rint(1) == 1);
1399 }
1400 
1401 void test_round()
1402 {
1403     static_assert((std::is_same<decltype(round((float)0)), float>::value), "");
1404     static_assert((std::is_same<decltype(round((bool)0)), double>::value), "");
1405     static_assert((std::is_same<decltype(round((unsigned short)0)), double>::value), "");
1406     static_assert((std::is_same<decltype(round((int)0)), double>::value), "");
1407     static_assert((std::is_same<decltype(round((unsigned int)0)), double>::value), "");
1408     static_assert((std::is_same<decltype(round((long)0)), double>::value), "");
1409     static_assert((std::is_same<decltype(round((unsigned long)0)), double>::value), "");
1410     static_assert((std::is_same<decltype(round((long long)0)), double>::value), "");
1411     static_assert((std::is_same<decltype(round((unsigned long long)0)), double>::value), "");
1412     static_assert((std::is_same<decltype(round((double)0)), double>::value), "");
1413     static_assert((std::is_same<decltype(round((long double)0)), long double>::value), "");
1414     static_assert((std::is_same<decltype(roundf(0)), float>::value), "");
1415     static_assert((std::is_same<decltype(roundl(0)), long double>::value), "");
1416     static_assert((std::is_same<decltype(round(Ambiguous())), Ambiguous>::value), "");
1417     assert(round(1) == 1);
1418 }
1419 
1420 void test_scalbln()
1421 {
1422     static_assert((std::is_same<decltype(scalbln((float)0, (long)0)), float>::value), "");
1423     static_assert((std::is_same<decltype(scalbln((bool)0, (long)0)), double>::value), "");
1424     static_assert((std::is_same<decltype(scalbln((unsigned short)0, (long)0)), double>::value), "");
1425     static_assert((std::is_same<decltype(scalbln((int)0, (long)0)), double>::value), "");
1426     static_assert((std::is_same<decltype(scalbln((unsigned int)0, (long)0)), double>::value), "");
1427     static_assert((std::is_same<decltype(scalbln((long)0, (long)0)), double>::value), "");
1428     static_assert((std::is_same<decltype(scalbln((unsigned long)0, (long)0)), double>::value), "");
1429     static_assert((std::is_same<decltype(scalbln((long long)0, (long)0)), double>::value), "");
1430     static_assert((std::is_same<decltype(scalbln((unsigned long long)0, (long)0)), double>::value), "");
1431     static_assert((std::is_same<decltype(scalbln((double)0, (long)0)), double>::value), "");
1432     static_assert((std::is_same<decltype(scalbln((long double)0, (long)0)), long double>::value), "");
1433     static_assert((std::is_same<decltype(scalblnf(0, (long)0)), float>::value), "");
1434     static_assert((std::is_same<decltype(scalblnl(0, (long)0)), long double>::value), "");
1435     static_assert((std::is_same<decltype(scalbln(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1436     assert(scalbln(1, 1) == 2);
1437 }
1438 
1439 void test_scalbn()
1440 {
1441     static_assert((std::is_same<decltype(scalbn((float)0, (int)0)), float>::value), "");
1442     static_assert((std::is_same<decltype(scalbn((bool)0, (int)0)), double>::value), "");
1443     static_assert((std::is_same<decltype(scalbn((unsigned short)0, (int)0)), double>::value), "");
1444     static_assert((std::is_same<decltype(scalbn((int)0, (int)0)), double>::value), "");
1445     static_assert((std::is_same<decltype(scalbn((unsigned int)0, (int)0)), double>::value), "");
1446     static_assert((std::is_same<decltype(scalbn((long)0, (int)0)), double>::value), "");
1447     static_assert((std::is_same<decltype(scalbn((unsigned long)0, (int)0)), double>::value), "");
1448     static_assert((std::is_same<decltype(scalbn((long long)0, (int)0)), double>::value), "");
1449     static_assert((std::is_same<decltype(scalbn((unsigned long long)0, (int)0)), double>::value), "");
1450     static_assert((std::is_same<decltype(scalbn((double)0, (int)0)), double>::value), "");
1451     static_assert((std::is_same<decltype(scalbn((long double)0, (int)0)), long double>::value), "");
1452     static_assert((std::is_same<decltype(scalbnf(0, (int)0)), float>::value), "");
1453     static_assert((std::is_same<decltype(scalbnl(0, (int)0)), long double>::value), "");
1454     static_assert((std::is_same<decltype(scalbn(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1455     assert(scalbn(1, 1) == 2);
1456 }
1457 
1458 void test_tgamma()
1459 {
1460     static_assert((std::is_same<decltype(tgamma((float)0)), float>::value), "");
1461     static_assert((std::is_same<decltype(tgamma((bool)0)), double>::value), "");
1462     static_assert((std::is_same<decltype(tgamma((unsigned short)0)), double>::value), "");
1463     static_assert((std::is_same<decltype(tgamma((int)0)), double>::value), "");
1464     static_assert((std::is_same<decltype(tgamma((unsigned int)0)), double>::value), "");
1465     static_assert((std::is_same<decltype(tgamma((long)0)), double>::value), "");
1466     static_assert((std::is_same<decltype(tgamma((unsigned long)0)), double>::value), "");
1467     static_assert((std::is_same<decltype(tgamma((long long)0)), double>::value), "");
1468     static_assert((std::is_same<decltype(tgamma((unsigned long long)0)), double>::value), "");
1469     static_assert((std::is_same<decltype(tgamma((double)0)), double>::value), "");
1470     static_assert((std::is_same<decltype(tgamma((long double)0)), long double>::value), "");
1471     static_assert((std::is_same<decltype(tgammaf(0)), float>::value), "");
1472     static_assert((std::is_same<decltype(tgammal(0)), long double>::value), "");
1473     static_assert((std::is_same<decltype(tgamma(Ambiguous())), Ambiguous>::value), "");
1474     assert(tgamma(1) == 1);
1475 }
1476 
1477 void test_trunc()
1478 {
1479     static_assert((std::is_same<decltype(trunc((float)0)), float>::value), "");
1480     static_assert((std::is_same<decltype(trunc((bool)0)), double>::value), "");
1481     static_assert((std::is_same<decltype(trunc((unsigned short)0)), double>::value), "");
1482     static_assert((std::is_same<decltype(trunc((int)0)), double>::value), "");
1483     static_assert((std::is_same<decltype(trunc((unsigned int)0)), double>::value), "");
1484     static_assert((std::is_same<decltype(trunc((long)0)), double>::value), "");
1485     static_assert((std::is_same<decltype(trunc((unsigned long)0)), double>::value), "");
1486     static_assert((std::is_same<decltype(trunc((long long)0)), double>::value), "");
1487     static_assert((std::is_same<decltype(trunc((unsigned long long)0)), double>::value), "");
1488     static_assert((std::is_same<decltype(trunc((double)0)), double>::value), "");
1489     static_assert((std::is_same<decltype(trunc((long double)0)), long double>::value), "");
1490     static_assert((std::is_same<decltype(truncf(0)), float>::value), "");
1491     static_assert((std::is_same<decltype(truncl(0)), long double>::value), "");
1492     static_assert((std::is_same<decltype(trunc(Ambiguous())), Ambiguous>::value), "");
1493     assert(trunc(1) == 1);
1494 }
1495 
1496 int main(int, char**)
1497 {
1498     test_abs();
1499     test_acos();
1500     test_asin();
1501     test_atan();
1502     test_atan2();
1503     test_ceil();
1504     test_cos();
1505     test_cosh();
1506     test_exp();
1507     test_fabs();
1508     test_floor();
1509     test_fmod();
1510     test_frexp();
1511     test_ldexp();
1512     test_log();
1513     test_log10();
1514     test_modf();
1515     test_pow();
1516     test_sin();
1517     test_sinh();
1518     test_sqrt();
1519     test_tan();
1520     test_tanh();
1521     test_signbit();
1522     test_fpclassify();
1523     test_isfinite();
1524     test_isnormal();
1525     test_isgreater();
1526     test_isgreaterequal();
1527     test_isinf();
1528     test_isless();
1529     test_islessequal();
1530     test_islessgreater();
1531     test_isnan();
1532     test_isunordered();
1533     test_acosh();
1534     test_asinh();
1535     test_atanh();
1536     test_cbrt();
1537     test_copysign();
1538     test_erf();
1539     test_erfc();
1540     test_exp2();
1541     test_expm1();
1542     test_fdim();
1543     test_fma();
1544     test_fmax();
1545     test_fmin();
1546     test_hypot();
1547     test_ilogb();
1548     test_lgamma();
1549     test_llrint();
1550     test_llround();
1551     test_log1p();
1552     test_log2();
1553     test_logb();
1554     test_lrint();
1555     test_lround();
1556     test_nan();
1557     test_nearbyint();
1558     test_nextafter();
1559     test_nexttoward();
1560     test_remainder();
1561     test_remquo();
1562     test_rint();
1563     test_round();
1564     test_scalbln();
1565     test_scalbn();
1566     test_tgamma();
1567     test_trunc();
1568 
1569   return 0;
1570 }
1571