Blame math/w_sqrtf_compat.c

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/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#define NO_MATH_REDIRECT
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#include <math.h>
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#include <math_private.h>
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#include <math-svid-compat.h>
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#include <libm-alias-float.h>
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#if LIBM_SVID_COMPAT
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/* wrapper sqrtf */
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float
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__sqrtf (float x)
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{
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  if (__builtin_expect (isless (x, 0.0f), 0) && _LIB_VERSION != _IEEE_)
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    return __kernel_standard_f (x, x, 126); /* sqrt(negative) */
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  return __ieee754_sqrtf (x);
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}
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libm_alias_float (__sqrt, sqrt)
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#endif