math/w_jnf_compat.c

   1 /* Copyright (C) 2011-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <fenv.h>
  19 #include <math.h>
  20 #include <math_private.h>
  21 #include <math-svid-compat.h>
  22 #include <libm-alias-float.h>
  23
  24
  25 #if LIBM_SVID_COMPAT
  26 /* wrapper jnf */
  27 float
  28 __jnf (int n, float x)
  29 {
  30   if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
  31       && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
  32     /* jn(n,|x|>X_TLOSS) */
  33     return __kernel_standard_f (n, x, 138);
  34
  35   return __ieee754_jnf (n, x);
  36 }
  37 libm_alias_float (__jn, jn)
  38
  39
  40 /* wrapper ynf */
  41 float
  42 __ynf (int n, float x)
  43 {
  44   if (__builtin_expect (islessequal (x, 0.0f)
  45                         || isgreater (x, (float) X_TLOSS), 0)
  46       && _LIB_VERSION != _IEEE_)
  47     {
  48       if (x < 0.0f)
  49         {
  50           /* d = zero/(x-x) */
  51           feraiseexcept (FE_INVALID);
  52           return __kernel_standard_f (n, x, 113);
  53         }
  54       else if (x == 0.0)
  55         {
  56           /* d = -one/(x-x) */
  57           feraiseexcept (FE_DIVBYZERO);
  58           return __kernel_standard_f (n, x, 112);
  59         }
  60       else if (_LIB_VERSION != _POSIX_)
  61         /* yn(n,x>X_TLOSS) */
  62         return __kernel_standard_f (n, x, 139);
  63     }
  64
  65   return __ieee754_ynf (n, x);
  66 }
  67 libm_alias_float (__yn, yn)
  68 #endif