46 lines · c
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___CXX03___MATH_COPYSIGN_H10#define _LIBCPP___CXX03___MATH_COPYSIGN_H11 12#include <__cxx03/__config>13#include <__cxx03/__type_traits/enable_if.h>14#include <__cxx03/__type_traits/is_arithmetic.h>15#include <__cxx03/__type_traits/promote.h>16#include <__cxx03/limits>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 24namespace __math {25 26// copysign27 28_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI float copysign(float __x, float __y) _NOEXCEPT {29 return ::__builtin_copysignf(__x, __y);30}31 32_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI long double copysign(long double __x, long double __y) _NOEXCEPT {33 return ::__builtin_copysignl(__x, __y);34}35 36template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>37_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type copysign(_A1 __x, _A2 __y) _NOEXCEPT {38 return ::__builtin_copysign(__x, __y);39}40 41} // namespace __math42 43_LIBCPP_END_NAMESPACE_STD44 45#endif // _LIBCPP___CXX03___MATH_COPYSIGN_H46