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63551311 UD |
1 | /* Return cosine of complex float value. |
2 | Copyright (C) 1997 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public License as | |
8 | published by the Free Software Foundation; either version 2 of the | |
9 | License, or (at your option) any later version. | |
10 | ||
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 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include <complex.h> | |
22 | #include <math.h> | |
23 | ||
24 | __complex__ float | |
25 | __cacosf (__complex__ float x) | |
26 | { | |
27 | __complex__ float y; | |
28 | __complex__ float res; | |
29 | ||
30 | y = __casinf (x); | |
31 | ||
32 | __real__ res = (float) M_PI_2 - __real__ y; | |
33 | __imag__ res = -__imag__ y; | |
34 | ||
35 | return res; | |
36 | } | |
37 | weak_alias (__cacosf, cacosf) |