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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___MATH_FDIM_H10#define _LIBCPP___MATH_FDIM_H11 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_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 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 __promote_t<_A1, _A2> fdim(_A1 __x, _A2 __y) _NOEXCEPT {39 using __result_type = __promote_t<_A1, _A2>;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 __math45 46_LIBCPP_END_NAMESPACE_STD47 48#endif // _LIBCPP___MATH_FDIM_H49