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c50eee19 | 1 | /* Return arc hyperbolic sine for a complex float type. |
ffb84f5e PM |
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 | ||
c50eee19 PM |
24 | CFLOAT |
25 | M_DECL_FUNC (__casinh) (CFLOAT x) | |
ffb84f5e | 26 | { |
c50eee19 | 27 | CFLOAT res; |
ffb84f5e PM |
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 | { | |
c50eee19 | 35 | __real__ res = M_COPYSIGN (M_HUGE_VAL, __real__ x); |
ffb84f5e PM |
36 | |
37 | if (rcls == FP_NAN) | |
c50eee19 | 38 | __imag__ res = M_NAN; |
ffb84f5e | 39 | else |
c50eee19 PM |
40 | __imag__ res = M_COPYSIGN ((rcls >= FP_ZERO |
41 | ? M_MLIT (M_PI_2) : M_MLIT (M_PI_4)), | |
ffb84f5e PM |
42 | __imag__ x); |
43 | } | |
44 | else if (rcls <= FP_INFINITE) | |
45 | { | |
46 | __real__ res = __real__ x; | |
47 | if ((rcls == FP_INFINITE && icls >= FP_ZERO) | |
48 | || (rcls == FP_NAN && icls == FP_ZERO)) | |
c50eee19 | 49 | __imag__ res = M_COPYSIGN (0, __imag__ x); |
ffb84f5e | 50 | else |
c50eee19 | 51 | __imag__ res = M_NAN; |
ffb84f5e PM |
52 | } |
53 | else | |
54 | { | |
c50eee19 PM |
55 | __real__ res = M_NAN; |
56 | __imag__ res = M_NAN; | |
ffb84f5e PM |
57 | } |
58 | } | |
59 | else if (rcls == FP_ZERO && icls == FP_ZERO) | |
60 | { | |
61 | res = x; | |
62 | } | |
63 | else | |
64 | { | |
c50eee19 | 65 | res = M_SUF (__kernel_casinh) (x, 0); |
ffb84f5e PM |
66 | } |
67 | ||
68 | return res; | |
69 | } | |
c50eee19 PM |
70 | |
71 | declare_mgen_alias (__casinh, casinh) | |
72 | ||
73 | #if M_LIBM_NEED_COMPAT (casinh) | |
74 | declare_mgen_libm_compat (__casinh, casinh) | |
ffb84f5e | 75 | #endif |