min_max.h 2.6 KB

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  1. //===----------------------------------------------------------------------===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. #ifndef _LIBCPP___MATH_MIN_MAX_H
  9. #define _LIBCPP___MATH_MIN_MAX_H
  10. #include <__config>
  11. #include <__type_traits/enable_if.h>
  12. #include <__type_traits/is_arithmetic.h>
  13. #include <__type_traits/is_same.h>
  14. #include <__type_traits/promote.h>
  15. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  16. # pragma GCC system_header
  17. #endif
  18. _LIBCPP_BEGIN_NAMESPACE_STD
  19. namespace __math {
  20. // fmax
  21. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float fmax(float __x, float __y) _NOEXCEPT {
  22. return __builtin_fmaxf(__x, __y);
  23. }
  24. template <class = int>
  25. _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double fmax(double __x, double __y) _NOEXCEPT {
  26. return __builtin_fmax(__x, __y);
  27. }
  28. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double fmax(long double __x, long double __y) _NOEXCEPT {
  29. return __builtin_fmaxl(__x, __y);
  30. }
  31. template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
  32. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type fmax(_A1 __x, _A2 __y) _NOEXCEPT {
  33. using __result_type = typename __promote<_A1, _A2>::type;
  34. static_assert((!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value)), "");
  35. return __math::fmax((__result_type)__x, (__result_type)__y);
  36. }
  37. // fmin
  38. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float fmin(float __x, float __y) _NOEXCEPT {
  39. return __builtin_fminf(__x, __y);
  40. }
  41. template <class = int>
  42. _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double fmin(double __x, double __y) _NOEXCEPT {
  43. return __builtin_fmin(__x, __y);
  44. }
  45. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double fmin(long double __x, long double __y) _NOEXCEPT {
  46. return __builtin_fminl(__x, __y);
  47. }
  48. template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
  49. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type fmin(_A1 __x, _A2 __y) _NOEXCEPT {
  50. using __result_type = typename __promote<_A1, _A2>::type;
  51. static_assert((!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value)), "");
  52. return __math::fmin((__result_type)__x, (__result_type)__y);
  53. }
  54. } // namespace __math
  55. _LIBCPP_END_NAMESPACE_STD
  56. #endif // _LIBCPP___MATH_MIN_MAX_H