w_j0f.c 2.0 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. #ifndef __DO_XSI_MATH__
  21. /* wrapper j0f */
  22. float
  23. j0f (float x)
  24. {
  25. # if __UCLIBC_HAS_FENV__
  26. if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
  27. && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
  28. /* j0(|x|>X_TLOSS) */
  29. return __kernel_standard_f (x, x, 134);
  30. # endif /* __UCLIBC_HAS_FENV__ */
  31. return (float) __ieee754_j0 ((double) x);
  32. }
  33. /* wrapper y0f */
  34. float
  35. y0f (float x)
  36. {
  37. # if __UCLIBC_HAS_FENV__
  38. if (__builtin_expect (islessequal (x, 0.0f)
  39. || isgreater (x, (float) X_TLOSS), 0)
  40. && _LIB_VERSION != _IEEE_)
  41. {
  42. if (x < 0.0f)
  43. {
  44. /* d = zero/(x-x) */
  45. feraiseexcept (FE_INVALID);
  46. return __kernel_standard_f (x, x, 109);
  47. }
  48. else if (x == 0.0f)
  49. {
  50. /* d = -one/(x-x) */
  51. feraiseexcept (FE_DIVBYZERO);
  52. return __kernel_standard_f (x, x, 108);
  53. }
  54. else if (_LIB_VERSION != _POSIX_)
  55. /* y0(x>X_TLOSS) */
  56. return __kernel_standard_f (x, x, 135);
  57. }
  58. # endif /* __UCLIBC_HAS_FENV__ */
  59. return (float) __ieee754_y0f ((double) x);
  60. }
  61. #endif /* __DO_XSI_MATH__ */