Blame math/w_j0f_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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#include <fenv.h>
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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 j0f */
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float
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__j0f (float x)
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{
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  if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
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      && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
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    /* j0(|x|>X_TLOSS) */
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    return __kernel_standard_f (x, x, 134);
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  return __ieee754_j0f (x);
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}
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libm_alias_float (__j0, j0)
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/* wrapper y0f */
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float
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__y0f (float x)
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{
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  if (__builtin_expect (islessequal (x, 0.0f)
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                        || isgreater (x, (float) X_TLOSS), 0)
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      && _LIB_VERSION != _IEEE_)
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    {
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      if (x < 0.0f)
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	{
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	  /* d = zero/(x-x) */
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	  feraiseexcept (FE_INVALID);
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	  return __kernel_standard_f (x, x, 109);
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	}
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      else if (x == 0.0f)
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	{
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	  /* d = -one/(x-x) */
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	  feraiseexcept (FE_DIVBYZERO);
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	  return __kernel_standard_f (x, x, 108);
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	}
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      else if (_LIB_VERSION != _POSIX_)
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	/* y0(x>X_TLOSS) */
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	return __kernel_standard_f (x, x, 135);
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    }
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  return __ieee754_y0f (x);
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}
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libm_alias_float (__y0, y0)
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#endif