math/w_j1f.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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <fenv.h>
  21 #include <math.h>
  22 #include <math_private.h>
  23
  24
  25 /* wrapper j1f */
  26 float
  27 j1f (float x)
  28 {
  29   if (__builtin_expect (fabsf (x) > X_TLOSS, 0) && _LIB_VERSION != _IEEE_)
  30     /* j1(|x|>X_TLOSS) */
  31     return __kernel_standard_f (x, x, 136);
  32
  33   return __ieee754_j1f (x);
  34 }
  35
  36
  37 /* wrapper y1f */
  38 float
  39 y1f (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, 111);
  49         }
  50       else if (x == 0.0f)
  51         /* d = -one/(x-x) */
  52         return __kernel_standard_f (x, x, 110);
  53       else
  54         /* y1(x>X_TLOSS) */
  55         return __kernel_standard_f (x, x, 137);
  56     }
  57
  58   return __ieee754_y1f (x);
  59 }