Blame math/w_exp10_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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/*
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 * wrapper exp10(x)
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 */
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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-double.h>
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#if LIBM_SVID_COMPAT
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double
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__exp10 (double x)
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{
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  double z = __ieee754_exp10 (x);
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  if (__builtin_expect (!isfinite (z) || z == 0, 0)
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      && isfinite (x) && _LIB_VERSION != _IEEE_)
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    /* exp10 overflow (46) if x > 0, underflow (47) if x < 0.  */
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    return __kernel_standard (x, x, 46 + !!signbit (x));
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  return z;
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}
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libm_alias_double (__exp10, exp10)
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# if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
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strong_alias (__exp10, __pow10)
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compat_symbol (libm, __pow10, pow10, GLIBC_2_1);
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# endif
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# ifdef NO_LONG_DOUBLE
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#  if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
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strong_alias (__exp10l, __pow10l)
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compat_symbol (libm, __pow10l, pow10l, GLIBC_2_1);
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#  endif
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# endif
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#endif