1/* Return arc hyperbole sine for float 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__ 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 {
64 res = __kernel_casinhf (x, 0);
65 }
66
67 return res;
68}
69#ifndef __casinhf
70weak_alias (__casinhf, casinhf)
71#endif
72