libcxx/include/__math/min_max.h

   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
   9 #ifndef _LIBCPP___MATH_MIN_MAX_H
  10 #define _LIBCPP___MATH_MIN_MAX_H
  11
  12 #include <__config>
  13 #include <__type_traits/enable_if.h>
  14 #include <__type_traits/is_arithmetic.h>
  15 #include <__type_traits/is_same.h>
  16 #include <__type_traits/promote.h>
  17
  18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  19 #  pragma GCC system_header
  20 #endif
  21
  22 _LIBCPP_BEGIN_NAMESPACE_STD
  23
  24 namespace __math {
  25
  26 // fmax
  27
  28 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI float fmax(float __x, float __y) _NOEXCEPT {
  29   return __builtin_fmaxf(__x, __y);
  30 }
  31
  32 template <class = int>
  33 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI double fmax(double __x, double __y) _NOEXCEPT {
  34   return __builtin_fmax(__x, __y);
  35 }
  36
  37 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI long double fmax(long double __x, long double __y) _NOEXCEPT {
  38   return __builtin_fmaxl(__x, __y);
  39 }
  40
  41 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
  42 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type fmax(_A1 __x, _A2 __y) _NOEXCEPT {
  43   using __result_type = typename __promote<_A1, _A2>::type;
  44   static_assert(!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value), "");
  45   return __math::fmax((__result_type)__x, (__result_type)__y);
  46 }
  47
  48 // fmin
  49
  50 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI float fmin(float __x, float __y) _NOEXCEPT {
  51   return __builtin_fminf(__x, __y);
  52 }
  53
  54 template <class = int>
  55 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI double fmin(double __x, double __y) _NOEXCEPT {
  56   return __builtin_fmin(__x, __y);
  57 }
  58
  59 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI long double fmin(long double __x, long double __y) _NOEXCEPT {
  60   return __builtin_fminl(__x, __y);
  61 }
  62
  63 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
  64 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type fmin(_A1 __x, _A2 __y) _NOEXCEPT {
  65   using __result_type = typename __promote<_A1, _A2>::type;
  66   static_assert(!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value), "");
  67   return __math::fmin((__result_type)__x, (__result_type)__y);
  68 }
  69
  70 } // namespace __math
  71
  72 _LIBCPP_END_NAMESPACE_STD
  73
  74 #endif // _LIBCPP___MATH_MIN_MAX_H