math/w_j0f.c

   1 /* Copyright (C) 2011 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 <fenv.h>
  20 #include <math.h>
  21 #include <math_private.h>
  22
  23
  24 /* wrapper j0f */
  25 float
  26 j0f (float x)
  27 {
  28   if (__builtin_expect (fabsf (x) > (float) X_TLOSS, 0)
  29       && _LIB_VERSION != _IEEE_)
  30     /* j0(|x|>X_TLOSS) */
  31     return __kernel_standard_f (x, x, 134);
  32
  33   return __ieee754_j0f (x);
  34 }
  35
  36
  37 /* wrapper y0f */
  38 float
  39 y0f (float x)
  40 {
  41   if (__builtin_expect (x <= 0.0f || x > (float) X_TLOSS, 0)
  42       && _LIB_VERSION != _IEEE_)
  43     {
  44       if (x < 0.0f)
  45         {
  46           /* d = zero/(x-x) */
  47           feraiseexcept (FE_INVALID);
  48           return __kernel_standard_f (x, x, 109);
  49         }
  50       else if (x == 0.0f)
  51         /* d = -one/(x-x) */
  52         return __kernel_standard_f (x, x, 108);
  53       else
  54         /* y0(x>X_TLOSS) */
  55         return __kernel_standard_f (x, x, 135);
  56     }
  57
  58   return __ieee754_y0f (x);
  59 }