libcxx/include/__math/abs.h

   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_ABS_H
  10 #define _LIBCPP___MATH_ABS_H
  11
  12 #include <__config>
  13 #include <__type_traits/enable_if.h>
  14 #include <__type_traits/is_integral.h>
  15
  16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  17 #  pragma GCC system_header
  18 #endif
  19
  20 _LIBCPP_BEGIN_NAMESPACE_STD
  21
  22 namespace __math {
  23
  24 // fabs
  25
  26 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI float fabs(float __x) _NOEXCEPT { return __builtin_fabsf(__x); }
  27
  28 template <class = int>
  29 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI double fabs(double __x) _NOEXCEPT {
  30   return __builtin_fabs(__x);
  31 }
  32
  33 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI long double fabs(long double __x) _NOEXCEPT {
  34   return __builtin_fabsl(__x);
  35 }
  36
  37 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  38 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI double fabs(_A1 __x) _NOEXCEPT {
  39   return __builtin_fabs((double)__x);
  40 }
  41
  42 } // namespace __math
  43
  44 _LIBCPP_END_NAMESPACE_STD
  45
  46 #endif // _LIBCPP___MATH_ABS_H