Blame math/w_j1f_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 j1f */
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float
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__j1f (float x)
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{
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  if (__builtin_expect (isgreater (fabsf (x), X_TLOSS), 0)
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      && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
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    /* j1(|x|>X_TLOSS) */
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    return __kernel_standard_f (x, x, 136);
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  return __ieee754_j1f (x);
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}
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libm_alias_float (__j1, j1)
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/* wrapper y1f */
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float
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__y1f (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, 111);
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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, 110);
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	}
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      else if (_LIB_VERSION != _POSIX_)
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	/* y1(x>X_TLOSS) */
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	return __kernel_standard_f (x, x, 137);
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    }
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  return __ieee754_y1f (x);
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}
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libm_alias_float (__y1, y1)
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#endif