f5256e16df
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103516 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
3.1 KiB
C++
110 lines
3.1 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 distributed under the University of Illinois Open Source
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// License. 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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// sqrt(const complex<T>& x);
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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 std::complex<T>& c, std::complex<T> x)
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{
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std::complex<T> a = sqrt(c);
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is_about(real(a), 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(std::complex<T>(64, 0), std::complex<T>(8, 0));
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}
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void test_edges()
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{
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const unsigned N = sizeof(x) / sizeof(x[0]);
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for (unsigned i = 0; i < N; ++i)
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{
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std::complex<double> r = sqrt(x[i]);
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if (x[i].real() == 0 && x[i].imag() == 0)
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{
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assert(!std::signbit(r.real()));
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assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));
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}
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else if (std::isinf(x[i].imag()))
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{
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assert(std::isinf(r.real()));
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assert(r.real() > 0);
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assert(std::isinf(r.imag()));
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assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));
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}
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else if (std::isfinite(x[i].real()) && std::isnan(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isnan(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() < 0 && std::isfinite(x[i].imag()))
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{
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assert(r.real() == 0);
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assert(!std::signbit(r.real()));
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) == std::signbit(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() > 0 && std::isfinite(x[i].imag()))
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{
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assert(std::isinf(r.real()));
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assert(r.real() > 0);
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assert(r.imag() == 0);
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assert(std::signbit(x[i].imag()) == std::signbit(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() < 0 && std::isnan(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isinf(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() > 0 && std::isnan(x[i].imag()))
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{
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assert(std::isinf(r.real()));
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assert(r.real() > 0);
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assert(std::isnan(r.imag()));
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}
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else if (std::isnan(x[i].real()) && (std::isfinite(x[i].imag()) || std::isnan(x[i].imag())))
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{
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assert(std::isnan(r.real()));
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assert(std::isnan(r.imag()));
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}
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else if (std::signbit(x[i].imag()))
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{
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assert(!std::signbit(r.real()));
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assert(std::signbit(r.imag()));
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}
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else
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{
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assert(!std::signbit(r.real()));
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assert(!std::signbit(r.imag()));
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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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