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_FDIM_H 10#define _LIBCPP___MATH_FDIM_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 24namespace __math { 25 26inline _LIBCPP_HIDE_FROM_ABI float fdim(float __x, float __y) _NOEXCEPT { return __builtin_fdimf(__x, __y); } 27 28template <class = int> 29_LIBCPP_HIDE_FROM_ABI double fdim(double __x, double __y) _NOEXCEPT { 30 return __builtin_fdim(__x, __y); 31} 32 33inline _LIBCPP_HIDE_FROM_ABI long double fdim(long double __x, long double __y) _NOEXCEPT { 34 return __builtin_fdiml(__x, __y); 35} 36 37template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0> 38inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type fdim(_A1 __x, _A2 __y) _NOEXCEPT { 39 using __result_type = typename __promote<_A1, _A2>::type; 40 static_assert((!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value)), ""); 41 return __math::fdim((__result_type)__x, (__result_type)__y); 42} 43 44} // namespace __math 45 46_LIBCPP_END_NAMESPACE_STD 47 48#endif // _LIBCPP___MATH_FDIM_H 49