1 | /* Return arc hyperbole sine for long double value. |
2 | Copyright (C) 1997-2016 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 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. |
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 | Lesser General Public License for more details. |
15 | |
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/>. */ |
19 | |
20 | #include <complex.h> |
21 | #include <math.h> |
22 | #include <math_private.h> |
23 | |
24 | __complex__ long double |
25 | __casinhl (__complex__ long double x) |
26 | { |
27 | __complex__ long double res; |
28 | int rcls = fpclassify (__real__ x); |
29 | int icls = fpclassify (__imag__ x); |
30 | |
31 | if (rcls <= FP_INFINITE || icls <= FP_INFINITE) |
32 | { |
33 | if (icls == FP_INFINITE) |
34 | { |
35 | __real__ res = __copysignl (HUGE_VALL, __real__ x); |
36 | |
37 | if (rcls == FP_NAN) |
38 | __imag__ res = __nanl ("" ); |
39 | else |
40 | __imag__ res = __copysignl (rcls >= FP_ZERO ? M_PI_2l : M_PI_4l, |
41 | __imag__ x); |
42 | } |
43 | else if (rcls <= FP_INFINITE) |
44 | { |
45 | __real__ res = __real__ x; |
46 | if ((rcls == FP_INFINITE && icls >= FP_ZERO) |
47 | || (rcls == FP_NAN && icls == FP_ZERO)) |
48 | __imag__ res = __copysignl (0.0, __imag__ x); |
49 | else |
50 | __imag__ res = __nanl ("" ); |
51 | } |
52 | else |
53 | { |
54 | __real__ res = __nanl ("" ); |
55 | __imag__ res = __nanl ("" ); |
56 | } |
57 | } |
58 | else if (rcls == FP_ZERO && icls == FP_ZERO) |
59 | { |
60 | res = x; |
61 | } |
62 | else |
63 | { |
64 | res = __kernel_casinhl (x, 0); |
65 | } |
66 | |
67 | return res; |
68 | } |
69 | weak_alias (__casinhl, casinhl) |
70 | |