xref: /freebsd/contrib/llvm-project/libcxx/include/__math/abs.h (revision c57c26179033f64c2011a2d2a904ee3fa62e826a)
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 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float fabs(float __x) _NOEXCEPT { return __builtin_fabsf(__x); }
27 
28 template <class = int>
29 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double fabs(double __x) _NOEXCEPT {
30   return __builtin_fabs(__x);
31 }
32 
33 _LIBCPP_NODISCARD_EXT 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 _LIBCPP_NODISCARD_EXT 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
47