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				//===----------------------------------------------------------------------===//
				//
				// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
				// See https://llvm.org/LICENSE.txt for license information.
				// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
				//
				//===----------------------------------------------------------------------===//

				#ifndef _LIBCPP___CMATH_FDIM_H
				#define _LIBCPP___CMATH_FDIM_H

				#include <__config>
				#include <__type_traits/enable_if.h>
				#include <__type_traits/is_arithmetic.h>
				#include <__type_traits/is_integral.h>
				#include <__type_traits/promote.h>

				#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
				# pragma GCC system_header
				#endif

				_LIBCPP_BEGIN_NAMESPACE_STD

				inline _LIBCPP_HIDE_FROM_ABI float fdim(float __x, float __y) _NOEXCEPT { return __builtin_fdimf(__x, __y); }

				template <class = int>
				_LIBCPP_HIDE_FROM_ABI double fdim(double __x, double __y) _NOEXCEPT {
				return __builtin_fdim(__x, __y);
				}

				inline _LIBCPP_HIDE_FROM_ABI long double fdim(long double __x, long double __y) _NOEXCEPT {
				return __builtin_fdiml(__x, __y);
				}

				template <class _Tp, class _Up, __enable_if_t<is_arithmetic<_Tp>::value && is_arithmetic<_Up>::value, int> = 0>
				_LIBCPP_HIDE_FROM_ABI typename __promote<_Tp, _Up>::type fdim(_Tp __x, _Up __y) _NOEXCEPT {
				using __result_type = typename __promote<_Tp, _Up>::type;
				return std::fdim(static_cast<__result_type>(__x), static_cast<__result_type>(__y));
				}

				_LIBCPP_END_NAMESPACE_STD

				using std::fdim;

				#endif // _LIBCPP___CMATH_FDIM_H