libm/w_j0l.c

   1 /* Copyright (C) 2011-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <math.h>
  20 #include "math_private.h"
  21 #if defined(__UCLIBC_HAS_FENV__)
  22 #include <fenv.h>
  23 #endif
  24
  25 #if !defined __NO_LONG_DOUBLE_MATH
  26 # ifndef __DO_XSI_MATH__
  27 /* wrapper j0l */
  28 long double
  29 j0l (long double x)
  30 {
  31 #  if defined(__UCLIBC_HAS_FENV__)
  32   if (__builtin_expect (isgreater (fabsl (x), X_TLOSS), 0)
  33       && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
  34     /* j0(|x|>X_TLOSS) */
  35     return __kernel_standard_l (x, x, 234);
  36 #  endif /* __UCLIBC_HAS_FENV__ */
  37   return (long double) __ieee754_j0 ((double)x);
  38 }
  39
  40 /* wrapper y0l */
  41 long double
  42 y0l (long double x)
  43 {
  44 #  if defined(__UCLIBC_HAS_FENV__)
  45   if (__builtin_expect (islessequal (x, 0.0L) || isgreater (x, X_TLOSS), 0)
  46       && _LIB_VERSION != _IEEE_)
  47     {
  48       if (x < 0.0L)
  49         {
  50           /* d = zero/(x-x) */
  51           feraiseexcept (FE_INVALID);
  52           return __kernel_standard_l (x, x, 209);
  53         }
  54       else if (x == 0.0L)
  55         {
  56           /* d = -one/(x-x) */
  57           feraiseexcept (FE_DIVBYZERO);
  58           return __kernel_standard_l (x, x, 208);
  59         }
  60       else if (_LIB_VERSION != _POSIX_)
  61         /* y0(x>X_TLOSS) */
  62         return __kernel_standard_l (x, x, 235);
  63     }
  64 #  endif /* __UCLIBC_HAS_FENV__ */
  65   return (long double)__ieee754_y0 ((double) x);
  66 }
  67 # endif /* __DO_XSI_MATH__ */
  68 #endif /* !defined __NO_LONG_DOUBLE_MATH */