Changeset View

Standalone View

				//===----------------------------------------------------------------------===//
				//
				// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
				// See https://llvm.org/LICENSE.txt for license information.
				// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
				//
				//===----------------------------------------------------------------------===//

				#ifndef _LIBCPP___CMATH_SIGNBIT_H
				#define _LIBCPP___CMATH_SIGNBIT_H

				#include <__config>
				#include <__type_traits/enable_if.h>
				#include <__type_traits/is_floating_point.h>
				#include <__type_traits/is_integral.h>
				#include <__type_traits/is_signed.h>

				#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
				# pragma GCC system_header
				#endif

				_LIBCPP_BEGIN_NAMESPACE_STD

				template <class _Tp, std::__enable_if_t<std::is_floating_point<_Tp>::value, int> = 0>
				_LIBCPP_HIDE_FROM_ABI bool signbit(_Tp __v) _NOEXCEPT {
				return __builtin_signbit(__v);
				}

				template <class _Tp, std::__enable_if_t<std::is_integral<_Tp>::value && std::is_signed<_Tp>::value, int> = 0>
				_LIBCPP_HIDE_FROM_ABI bool signbit(_Tp __v) _NOEXCEPT {
				return __v < 0;
				}

				template <class _Tp, std::__enable_if_t<std::is_integral<_Tp>::value && !std::is_signed<_Tp>::value, int> = 0>
				_LIBCPP_HIDE_FROM_ABI bool signbit(_Tp) _NOEXCEPT {
				return false;
				}

				_LIBCPP_END_NAMESPACE_STD

				using std::signbit;

				#endif // _LIBCPP___CMATH_SIGNBIT_H