blob: c8a060d44b14234da4309e6c19f20d32cf8c460a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* Return arc hyperbolic cosine for a complex type.
Copyright (C) 1997-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <complex.h>
#include <math.h>
#include <math_private.h>
CFLOAT
M_DECL_FUNC (__cacosh) (CFLOAT x)
{
CFLOAT res;
int rcls = fpclassify (__real__ x);
int icls = fpclassify (__imag__ x);
if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
{
if (icls == FP_INFINITE)
{
__real__ res = M_HUGE_VAL;
if (rcls == FP_NAN)
__imag__ res = M_NAN;
else
__imag__ res = M_COPYSIGN ((rcls == FP_INFINITE
? (__real__ x < 0
? M_MLIT (M_PI) - M_MLIT (M_PI_4)
: M_MLIT (M_PI_4))
: M_MLIT (M_PI_2)), __imag__ x);
}
else if (rcls == FP_INFINITE)
{
__real__ res = M_HUGE_VAL;
if (icls >= FP_ZERO)
__imag__ res = M_COPYSIGN (signbit (__real__ x)
? M_MLIT (M_PI) : 0, __imag__ x);
else
__imag__ res = M_NAN;
}
else
{
__real__ res = M_NAN;
if (rcls == FP_ZERO)
__imag__ res = M_MLIT (M_PI_2);
else
__imag__ res = M_NAN;
}
}
else if (rcls == FP_ZERO && icls == FP_ZERO)
{
__real__ res = 0;
__imag__ res = M_COPYSIGN (M_MLIT (M_PI_2), __imag__ x);
}
else
{
CFLOAT y;
__real__ y = -__imag__ x;
__imag__ y = __real__ x;
y = M_SUF (__kernel_casinh) (y, 1);
if (signbit (__imag__ x))
{
__real__ res = __real__ y;
__imag__ res = -__imag__ y;
}
else
{
__real__ res = -__real__ y;
__imag__ res = __imag__ y;
}
}
return res;
}
declare_mgen_alias (__cacosh, cacosh)
|
