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/* Euclidean distance function. Double/Binary64 i386 version.
Copyright (C) 2021 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
__ieee754_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);
return r;
}
libm_alias_finite (__ieee754_hypot, __hypot)
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