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),
  31                                    AS_FLOAT_CONSTANT (X_TLOSS)), 0)
  32       && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
  33     /* jn(n,|x|>X_TLOSS) */
  34     return __kernel_standard_f (n, x, 138);
  35
  36   return __ieee754_jnf (n, x);
  37 }
  38 libm_alias_float (__jn, jn)
  39
  40
  41 /* wrapper ynf */
  42 float
  43 __ynf (int n, float x)
  44 {
  45   if (__builtin_expect (islessequal (x, 0.0f)
  46                         || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
  47       && _LIB_VERSION != _IEEE_)
  48     {
  49       if (x < 0.0f)
  50         {
  51           /* d = zero/(x-x) */
  52           feraiseexcept (FE_INVALID);
  53           return __kernel_standard_f (n, x, 113);
  54         }
  55       else if (x == 0.0)
  56         {
  57           /* d = -one/(x-x) */
  58           feraiseexcept (FE_DIVBYZERO);
  59           return __kernel_standard_f (n, x, 112);
  60         }
  61       else if (_LIB_VERSION != _POSIX_)
  62         /* yn(n,x>X_TLOSS) */
  63         return __kernel_standard_f (n, x, 139);
  64     }
  65
  66   return __ieee754_ynf (n, x);
  67 }
  68 libm_alias_float (__yn, yn)
  69 #endif