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/* Return the reciprocal of the square root of X.
Copyright (C) 2025 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 <errno.h>
#include <math.h>
FLOAT
M_DECL_FUNC (__rsqrt) (FLOAT x)
{
if (islessequal (x, M_LIT (0.0)))
__set_errno (x < 0 ? EDOM : ERANGE);
return M_LIT (1.0) / M_SQRT (x);
}
declare_mgen_alias (__rsqrt, rsqrt);
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