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 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 32 test() 33 { 34 test(std::complex<T>(2, 3), std::complex<T>(2, 0), std::complex<T>(-5, 12)); 35 } 36 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 65 int main() 66 { 67 test<float>(); 68 test<double>(); 69 test<long double>(); 70 test_edges(); 71 } 72
