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 24 namespace __math { 25 26 inline _LIBCPP_HIDE_FROM_ABI float fdim(float __x, float __y) _NOEXCEPT { return __builtin_fdimf(__x, __y); } 27 28 template <class = int> 29 _LIBCPP_HIDE_FROM_ABI double fdim(double __x, double __y) _NOEXCEPT { 30 return __builtin_fdim(__x, __y); 31 } 32 33 inline _LIBCPP_HIDE_FROM_ABI long double fdim(long double __x, long double __y) _NOEXCEPT { 34 return __builtin_fdiml(__x, __y); 35 } 36 37 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0> 38 inline _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