__cxx03/__math/abs.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_ABS_H
0010 #define _LIBCPP___CXX03___MATH_ABS_H
0011
0012 #include <__cxx03/__config>
0013 #include <__cxx03/__type_traits/enable_if.h>
0014 #include <__cxx03/__type_traits/is_integral.h>
0015
0016 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0017 #  pragma GCC system_header
0018 #endif
0019
0020 _LIBCPP_BEGIN_NAMESPACE_STD
0021
0022 namespace __math {
0023
0024 // fabs
0025
0026 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI float fabs(float __x) _NOEXCEPT { return __builtin_fabsf(__x); }
0027
0028 template <class = int>
0029 _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI double fabs(double __x) _NOEXCEPT {
0030   return __builtin_fabs(__x);
0031 }
0032
0033 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI long double fabs(long double __x) _NOEXCEPT {
0034   return __builtin_fabsl(__x);
0035 }
0036
0037 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
0038 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI double fabs(_A1 __x) _NOEXCEPT {
0039   return __builtin_fabs((double)__x);
0040 }
0041
0042 } // namespace __math
0043
0044 _LIBCPP_END_NAMESPACE_STD
0045
0046 #endif // _LIBCPP___CXX03___MATH_ABS_H