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_FMA_H 10 #define _LIBCPP___MATH_FMA_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 fma(float __x, float __y, float __z) _NOEXCEPT { 27 return __builtin_fmaf(__x, __y, __z); 28 } 29 30 template <class = int> 31 _LIBCPP_HIDE_FROM_ABI double fma(double __x, double __y, double __z) _NOEXCEPT { 32 return __builtin_fma(__x, __y, __z); 33 } 34 35 inline _LIBCPP_HIDE_FROM_ABI long double fma(long double __x, long double __y, long double __z) _NOEXCEPT { 36 return __builtin_fmal(__x, __y, __z); 37 } 38 39 template <class _A1, 40 class _A2, 41 class _A3, 42 __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value && is_arithmetic<_A3>::value, int> = 0> 43 inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2, _A3>::type fma(_A1 __x, _A2 __y, _A3 __z) _NOEXCEPT { 44 using __result_type = typename __promote<_A1, _A2, _A3>::type; 45 static_assert((!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value && 46 _IsSame<_A3, __result_type>::value)), 47 ""); 48 return __builtin_fma((__result_type)__x, (__result_type)__y, (__result_type)__z); 49 } 50 51 } // namespace __math 52 53 _LIBCPP_END_NAMESPACE_STD 54 55 #endif // _LIBCPP___MATH_FMA_H 56