__cxx03/__math/copysign.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___CXX03___MATH_COPYSIGN_H
0010 #define _LIBCPP___CXX03___MATH_COPYSIGN_H
0011
0012 #include <__cxx03/__config>
0013 #include <__cxx03/__type_traits/enable_if.h>
0014 #include <__cxx03/__type_traits/is_arithmetic.h>
0015 #include <__cxx03/__type_traits/promote.h>
0016 #include <__cxx03/limits>
0017
0018 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0019 #  pragma GCC system_header
0020 #endif
0021
0022 _LIBCPP_BEGIN_NAMESPACE_STD
0023
0024 namespace __math {
0025
0026 // copysign
0027
0028 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI float copysign(float __x, float __y) _NOEXCEPT {
0029   return ::__builtin_copysignf(__x, __y);
0030 }
0031
0032 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI long double copysign(long double __x, long double __y) _NOEXCEPT {
0033   return ::__builtin_copysignl(__x, __y);
0034 }
0035
0036 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
0037 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type copysign(_A1 __x, _A2 __y) _NOEXCEPT {
0038   return ::__builtin_copysign(__x, __y);
0039 }
0040
0041 } // namespace __math
0042
0043 _LIBCPP_END_NAMESPACE_STD
0044
0045 #endif // _LIBCPP___CXX03___MATH_COPYSIGN_H