mathdef.h 1.8 KB

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  1. /* Copyright (C) 1999-2016 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library. If not, see
  13. <http://www.gnu.org/licenses/>. */
  14. #if !defined _MATH_H && !defined _COMPLEX_H
  15. # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  16. #endif
  17. #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
  18. # define _MATH_H_MATHDEF 1
  19. /* GCC does not promote `float' values to `double'. */
  20. typedef float float_t; /* `float' expressions are evaluated as
  21. `float'. */
  22. typedef double double_t; /* `double' expressions are evaluated as
  23. `double'. */
  24. /* The values returned by `ilogb' for 0 and NaN respectively. */
  25. # define FP_ILOGB0 (-2147483647)
  26. # define FP_ILOGBNAN (2147483647)
  27. /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
  28. builtins are supported. */
  29. # ifdef __FP_FAST_FMA
  30. # define FP_FAST_FMA 1
  31. # endif
  32. # ifdef __FP_FAST_FMAF
  33. # define FP_FAST_FMAF 1
  34. # endif
  35. # ifdef __FP_FAST_FMAL
  36. # define FP_FAST_FMAL 1
  37. # endif
  38. #endif /* ISO C99 */
  39. #ifndef __NO_LONG_DOUBLE_MATH
  40. /* Signal that we do not really have a `long double'. This disables the
  41. declaration of all the `long double' function variants. */
  42. # define __NO_LONG_DOUBLE_MATH 1
  43. #endif