1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <complex>
11
12 // template<class T>
13 // complex<T>
14 // pow(const complex<T>& x, const complex<T>& y);
15
16 #include <complex>
17 #include <cassert>
18
19 #include "../cases.h"
20
21 template <class T>
22 void
test(const std::complex<T> & a,const std::complex<T> & b,std::complex<T> x)23 test(const std::complex<T>& a, const std::complex<T>& b, std::complex<T> x)
24 {
25 std::complex<T> c = pow(a, b);
26 is_about(real(c), real(x));
27 is_about(imag(c), imag(x));
28 }
29
30 template <class T>
31 void
test()32 test()
33 {
34 test(std::complex<T>(2, 3), std::complex<T>(2, 0), std::complex<T>(-5, 12));
35 }
36
test_edges()37 void test_edges()
38 {
39 const double pi = std::atan2(+0., -0.);
40 const unsigned N = sizeof(x) / sizeof(x[0]);
41 for (unsigned i = 0; i < N; ++i)
42 {
43 for (unsigned j = 0; j < N; ++j)
44 {
45 std::complex<double> r = pow(x[i], x[j]);
46 std::complex<double> z = exp(x[j] * log(x[i]));
47 if (std::isnan(real(r)))
48 assert(std::isnan(real(z)));
49 else
50 {
51 assert(real(r) == real(z));
52 assert(std::signbit(real(r)) == std::signbit(real(z)));
53 }
54 if (std::isnan(imag(r)))
55 assert(std::isnan(imag(z)));
56 else
57 {
58 assert(imag(r) == imag(z));
59 assert(std::signbit(imag(r)) == std::signbit(imag(z)));
60 }
61 }
62 }
63 }
64
main()65 int main()
66 {
67 test<float>();
68 test<double>();
69 test<long double>();
70 test_edges();
71 }
72