blob: 2d0a6b039366e8fe2091fdac21cfef12d6083cf2 (
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
|
/* Copy sign into another 'long double' number.
Copyright (C) 2011-2022 Free Software Foundation, Inc.
This file 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 3 of the
License, or (at your option) any later version.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <math.h>
#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
long double
copysignl (long double x, long double y)
{
return copysign (x, y);
}
#else
# if defined __hpux && !defined __GNUC__
# include <float.h>
/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L. */
static long double
compute_minus_zerol (void)
{
return -LDBL_MIN * LDBL_MIN;
}
# define minus_zerol compute_minus_zerol ()
/* HP cc on HP-UX 11 has a bug: When x is a positive zero, - x comes out
as a positive zero, rather than as a minus zero. Work around it. */
static long double
unary_minus (long double x)
{
if (x == 0.0L)
{
if (signbit (x))
return 0.0L;
else
return minus_zerol;
}
else
return - x;
}
# endif
long double
copysignl (long double x, long double y)
{
# if defined __hpux && !defined __GNUC__
return (signbit (x) != signbit (y) ? unary_minus (x) : x);
# else
return (signbit (x) != signbit (y) ? - x : x);
# endif
}
#endif
|
