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
|
/* Euclidean distance function. Double/Binary64 i386 version.
Copyright (C) 2021-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <math.h>
#include <math_private.h>
#include <math-narrow-eval.h>
#include <math-underflow.h>
#include <math-svid-compat.h>
#include <libm-alias-finite.h>
#include <libm-alias-double.h>
#include <errno.h>
/* The i386 allows to use the default excess of precision to optimize the
hypot implementation, since internal multiplication and sqrt is carried
with 80-bit FP type. */
double
__hypot (double x, double y)
{
if (!isfinite (x) || !isfinite (y))
{
if ((isinf (x) || isinf (y))
&& !issignaling (x) && !issignaling (y))
return INFINITY;
return x + y;
}
long double lx = x;
long double ly = y;
double r = math_narrow_eval ((double) sqrtl (lx * lx + ly * ly));
math_check_force_underflow_nonneg (r);
if (isinf (r))
__set_errno (ERANGE);
return r;
}
strong_alias (__hypot, __ieee754_hypot)
#if LIBM_SVID_COMPAT
versioned_symbol (libm, __hypot, hypot, GLIBC_2_35);
libm_alias_finite (__ieee754_hypot, __hypot)
libm_alias_double_other (__hypot, hypot)
#else
libm_alias_double (__hypot, hypot)
#endif
|
