forked from OSchip/llvm-project
70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <complex>
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// template<class T>
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// complex<T>
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// pow(const T& x, const complex<T>& y);
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#include <complex>
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#include <cassert>
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#include "../cases.h"
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template <class T>
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void
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test(const T& a, const std::complex<T>& b, std::complex<T> x)
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{
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std::complex<T> c = pow(a, b);
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is_about(real(c), real(x));
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assert(std::abs(imag(c)) < 1.e-6);
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}
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template <class T>
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void
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test()
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{
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test(T(2), std::complex<T>(2), std::complex<T>(4));
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}
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void test_edges()
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{
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const double pi = std::atan2(+0., -0.);
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const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
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for (unsigned i = 0; i < N; ++i)
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{
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for (unsigned j = 0; j < N; ++j)
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{
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std::complex<double> r = pow(real(testcases[i]), testcases[j]);
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std::complex<double> z = exp(testcases[j] * log(std::complex<double>(real(testcases[i]))));
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if (std::isnan(real(r)))
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assert(std::isnan(real(z)));
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else
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{
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assert(real(r) == real(z));
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}
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if (std::isnan(imag(r)))
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assert(std::isnan(imag(z)));
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else
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{
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assert(imag(r) == imag(z));
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}
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}
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}
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}
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int main()
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{
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test<float>();
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test<double>();
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test<long double>();
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test_edges();
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}
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