w_jnf.c 1.9 KB

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  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. 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. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <math.h>
  16. #include "math_private.h"
  17. #if __UCLIBC_HAS_FENV__
  18. #include <fenv.h>
  19. #endif
  20. /* wrapper jnf */
  21. float
  22. jnf (int n, float x)
  23. {
  24. #if __UCLIBC_HAS_FENV__
  25. if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
  26. && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
  27. /* jn(n,|x|>X_TLOSS) */
  28. return __kernel_standard_f (n, x, 138);
  29. #endif
  30. return (float) __ieee754_jn (n, (double) x);
  31. }
  32. /* wrapper ynf */
  33. float
  34. ynf (int n, float x)
  35. {
  36. #if __UCLIBC_HAS_FENV__
  37. if (__builtin_expect (islessequal (x, 0.0f)
  38. || isgreater (x, (float) X_TLOSS), 0)
  39. && _LIB_VERSION != _IEEE_)
  40. {
  41. if (x < 0.0f)
  42. {
  43. /* d = zero/(x-x) */
  44. feraiseexcept (FE_INVALID);
  45. return __kernel_standard_f (n, x, 113);
  46. }
  47. else if (x == 0.0)
  48. {
  49. /* d = -one/(x-x) */
  50. feraiseexcept (FE_DIVBYZERO);
  51. return __kernel_standard_f (n, x, 112);
  52. }
  53. else if (_LIB_VERSION != _POSIX_)
  54. /* yn(n,x>X_TLOSS) */
  55. return __kernel_standard_f (n, x, 139);
  56. }
  57. #endif /* __UCLIBC_HAS_FENV__ */
  58. return (float) __ieee754_yn (n, (double) x);
  59. }