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 //===----------------------------------------------------------------------===//
12 // template<class T> class valarray;
16 // atan2(const valarray<T>& x, const T& y);
23 bool is_about(double x, double y, int p)
29 std::string a = o.str();
39 T a1[] = {-.9, -.5, 0., .5, .75};
40 T a3[] = {-8.7605805059819342e-01,
41 -5.8800260354756750e-01,
42 0.0000000000000000e+00,
43 5.8800260354756750e-01,
44 7.8539816339744828e-01};
45 const unsigned N = sizeof(a1)/sizeof(a1[0]);
46 std::valarray<T> v1(a1, N);
47 std::valarray<T> v3 = atan2(v1, .75);
48 assert(v3.size() == v1.size());
49 for (std::size_t i = 0; i < v3.size(); ++i)
50 assert(is_about(v3[i], a3[i], 10));