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_COPYSIGN_H 10 #define _LIBCPP___MATH_COPYSIGN_H 11 12 #include <__config> 13 #include <__type_traits/enable_if.h> 14 #include <__type_traits/is_arithmetic.h> 15 #include <__type_traits/promote.h> 16 #include <limits> 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 // copysign 27 28 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float copysign(float __x, float __y) _NOEXCEPT { 29 return ::__builtin_copysignf(__x, __y); 30 } 31 32 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double copysign(long double __x, long double __y) _NOEXCEPT { 33 return ::__builtin_copysignl(__x, __y); 34 } 35 36 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0> 37 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type 38 copysign(_A1 __x, _A2 __y) _NOEXCEPT { 39 return ::__builtin_copysign(__x, __y); 40 } 41 42 } // namespace __math 43 44 _LIBCPP_END_NAMESPACE_STD 45 46 #endif // _LIBCPP___MATH_COPYSIGN_H 47