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63551311 | 1 | /* Return arc hyperbole sine for float value. |
b168057a | 2 | Copyright (C) 1997-2015 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> | |
bc62c2fb | 22 | #include <math_private.h> |
63551311 UD |
23 | |
24 | __complex__ float | |
25 | __casinhf (__complex__ float x) | |
26 | { | |
27 | __complex__ float 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 = __copysignf (HUGE_VALF, __real__ x); | |
36 | ||
37 | if (rcls == FP_NAN) | |
38 | __imag__ res = __nanf (""); | |
39 | else | |
40 | __imag__ res = __copysignf (rcls >= FP_ZERO ? M_PI_2 : M_PI_4, | |
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 = __copysignf (0.0, __imag__ x); | |
49 | else | |
50 | __imag__ res = __nanf (""); | |
51 | } | |
52 | else | |
53 | { | |
54 | __real__ res = __nanf (""); | |
55 | __imag__ res = __nanf (""); | |
56 | } | |
57 | } | |
58 | else if (rcls == FP_ZERO && icls == FP_ZERO) | |
59 | { | |
60 | res = x; | |
61 | } | |
62 | else | |
63 | { | |
728d7b43 | 64 | res = __kernel_casinhf (x, 0); |
63551311 UD |
65 | } |
66 | ||
67 | return res; | |
68 | } | |
1705f0a3 | 69 | #ifndef __casinhf |
63551311 | 70 | weak_alias (__casinhf, casinhf) |
1705f0a3 | 71 | #endif |