1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
14 // atanh(const complex<T>& x);
23 test(const std::complex<T>& c, std::complex<T> x)
25 assert(atanh(c) == x);
32 test(std::complex<T>(0, 0), std::complex<T>(0, 0));
37 typedef std::complex<double> C;
38 const double pi = std::atan2(+0., -0.);
39 const unsigned N = sizeof(x) / sizeof(x[0]);
40 for (unsigned i = 0; i < N; ++i)
42 std::complex<double> r = atanh(x[i]);
43 if (x[i].real() == 0 && x[i].imag() == 0)
45 assert(std::signbit(r.real()) == std::signbit(x[i].real()));
46 assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));
48 else if ( x[i].real() == 0 && std::isnan(x[i].imag()))
50 assert(r.real() == 0);
51 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
52 assert(std::isnan(r.imag()));
54 else if (abs(x[i].real()) == 1 && x[i].imag() == 0)
56 assert(std::isinf(r.real()));
57 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
58 assert(r.imag() == 0);
59 assert(std::signbit(x[i].imag()) == std::signbit(r.imag()));
61 else if (std::isfinite(x[i].real()) && std::isinf(x[i].imag()))
63 assert(r.real() == 0);
64 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
66 is_about(r.imag(), pi/2);
68 is_about(r.imag(), -pi/2);
70 else if (std::isfinite(x[i].real()) && std::isnan(x[i].imag()))
72 assert(std::isnan(r.real()));
73 assert(std::isnan(r.imag()));
75 else if (std::isinf(x[i].real()) && std::isfinite(x[i].imag()))
77 assert(r.real() == 0);
78 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
79 if (std::signbit(x[i].imag()))
80 is_about(r.imag(), -pi/2);
82 is_about(r.imag(), pi/2);
84 else if (std::isinf(x[i].real()) && std::isinf(x[i].imag()))
86 assert(r.real() == 0);
87 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
88 if (std::signbit(x[i].imag()))
89 is_about(r.imag(), -pi/2);
91 is_about(r.imag(), pi/2);
93 else if (std::isinf(x[i].real()) && std::isnan(x[i].imag()))
95 assert(r.real() == 0);
96 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
97 assert(std::isnan(r.imag()));
99 else if (std::isnan(x[i].real()) && std::isfinite(x[i].imag()))
101 assert(std::isnan(r.real()));
102 assert(std::isnan(r.imag()));
104 else if (std::isnan(x[i].real()) && std::isinf(x[i].imag()))
106 assert(r.real() == 0);
107 assert(std::signbit(x[i].real()) == std::signbit(r.real()));
108 if (std::signbit(x[i].imag()))
109 is_about(r.imag(), -pi/2);
111 is_about(r.imag(), pi/2);
113 else if (std::isnan(x[i].real()) && std::isnan(x[i].imag()))
115 assert(std::isnan(r.real()));
116 assert(std::isnan(r.imag()));
120 assert(std::signbit(r.real()) == std::signbit(x[i].real()));
121 assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));