tanh.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02 
1//===----------------------------------------------------------------------===//
2//
3// ��������������������The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <complex>
11
12// template<class T>
13//   complex<T>
14//   tanh(const complex<T>& x);
15
16#include <complex>
17#include <cassert>
18
19#include "../cases.h"
20
21template <class T>
22void
23test(const std::complex<T>& c, std::complex<T> x)
24{
25    assert(tanh(c) == x);
26}
27
28template <class T>
29void
30test()
31{
32    test(std::complex<T>(0, 0), std::complex<T>(0, 0));
33}
34
35void test_edges()
36{
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)
41    {
42        std::complex<double> r = tanh(x[i]);
43        if (x[i].real() == 0 && x[i].imag() == 0)
44        {
45            assert(r.real() == 0);
46            assert(std::signbit(r.real()) == std::signbit(x[i].real()));
47            assert(r.imag() == 0);
48            assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));
49        }
50        else if (std::isfinite(x[i].real()) && std::isinf(x[i].imag()))
51        {
52            assert(std::isnan(r.real()));
53            assert(std::isnan(r.imag()));
54        }
55        else if (std::isfinite(x[i].real()) && std::isnan(x[i].imag()))
56        {
57            assert(std::isnan(r.real()));
58            assert(std::isnan(r.imag()));
59        }
60        else if (std::isinf(x[i].real()) && std::isfinite(x[i].imag()))
61        {
62            assert(r.real() == 1);
63            assert(r.imag() == 0);
64            assert(std::signbit(r.imag()) == std::signbit(sin(2*x[i].imag())));
65        }
66        else if (std::isinf(x[i].real()) && std::isinf(x[i].imag()))
67        {
68            assert(r.real() == 1);
69            assert(r.imag() == 0);
70        }
71        else if (std::isinf(x[i].real()) && std::isnan(x[i].imag()))
72        {
73            assert(r.real() == 1);
74            assert(r.imag() == 0);
75        }
76        else if (std::isnan(x[i].real()) && x[i].imag() == 0)
77        {
78            assert(std::isnan(r.real()));
79            assert(r.imag() == 0);
80            assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));
81        }
82        else if (std::isnan(x[i].real()) && std::isfinite(x[i].imag()))
83        {
84            assert(std::isnan(r.real()));
85            assert(std::isnan(r.imag()));
86        }
87        else if (std::isnan(x[i].real()) && std::isnan(x[i].imag()))
88        {
89            assert(std::isnan(r.real()));
90            assert(std::isnan(r.imag()));
91        }
92    }
93}
94
95int main()
96{
97    test<float>();
98    test<double>();
99    test<long double>();
100    test_edges();
101}
102