]>
Commit | Line | Data |
---|---|---|
63551311 | 1 | /* Return cosine of complex float value. |
f7a9f785 | 2 | Copyright (C) 1997-2016 Free Software Foundation, Inc. |
63551311 UD |
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 | |
41bdb6e2 AJ |
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. | |
63551311 UD |
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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
63551311 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
63551311 UD |
19 | |
20 | #include <complex.h> | |
21 | #include <math.h> | |
22 | ||
23 | __complex__ float | |
24 | __cacosf (__complex__ float x) | |
25 | { | |
26 | __complex__ float y; | |
27 | __complex__ float res; | |
728d7b43 JM |
28 | int rcls = fpclassify (__real__ x); |
29 | int icls = fpclassify (__imag__ x); | |
30 | ||
31 | if (rcls <= FP_INFINITE || icls <= FP_INFINITE | |
32 | || (rcls == FP_ZERO && icls == FP_ZERO)) | |
33 | { | |
34 | y = __casinf (x); | |
35 | ||
36 | __real__ res = (float) M_PI_2 - __real__ y; | |
01dbacd2 JM |
37 | if (__real__ res == 0.0f) |
38 | __real__ res = 0.0f; | |
728d7b43 JM |
39 | __imag__ res = -__imag__ y; |
40 | } | |
41 | else | |
42 | { | |
43 | __real__ y = -__imag__ x; | |
44 | __imag__ y = __real__ x; | |
45 | ||
46 | y = __kernel_casinhf (y, 1); | |
47 | ||
48 | __real__ res = __imag__ y; | |
49 | __imag__ res = __real__ y; | |
50 | } | |
63551311 UD |
51 | |
52 | return res; | |
53 | } | |
1705f0a3 | 54 | #ifndef __cacosf |
63551311 | 55 | weak_alias (__cacosf, cacosf) |
1705f0a3 | 56 | #endif |