1 /* Return cosine of complex float value.
2 Copyright (C) 1997-2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
24 __cacosf (__complex__ float x)
27 __complex__ float res;
28 int rcls = fpclassify (__real__ x);
29 int icls = fpclassify (__imag__ x);
31 if (rcls <= FP_INFINITE || icls <= FP_INFINITE
32 || (rcls == FP_ZERO && icls == FP_ZERO))
36 __real__ res = (float) M_PI_2 - __real__ y;
37 __imag__ res = -__imag__ y;
41 __real__ y = -__imag__ x;
42 __imag__ y = __real__ x;
44 y = __kernel_casinhf (y, 1);
46 __real__ res = __imag__ y;
47 __imag__ res = __real__ y;
53 weak_alias (__cacosf, cacosf)