blob: 9776c71c4747a14d0b4aed8076033b87a9100818 (
plain) (
blame)
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
|
/* Return arc sine of a complex float type.
Copyright (C) 1997-2021 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
<https://www.gnu.org/licenses/>. */
#include <complex.h>
#include <math.h>
CFLOAT
M_DECL_FUNC (__casin) (CFLOAT x)
{
CFLOAT res;
if (isnan (__real__ x) || isnan (__imag__ x))
{
if (__real__ x == 0)
{
res = x;
}
else if (isinf (__real__ x) || isinf (__imag__ x))
{
__real__ res = M_NAN;
__imag__ res = M_COPYSIGN (M_HUGE_VAL, __imag__ x);
}
else
{
__real__ res = M_NAN;
__imag__ res = M_NAN;
}
}
else
{
CFLOAT y;
__real__ y = -__imag__ x;
__imag__ y = __real__ x;
y = M_SUF (__casinh) (y);
__real__ res = __imag__ y;
__imag__ res = -__real__ y;
}
return res;
}
declare_mgen_alias (__casin, casin)
|
