2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
16 This entire header is C99 / C++0X
40 int feclearexcept(int excepts);
41 int fegetexceptflag(fexcept_t* flagp, int excepts);
42 int feraiseexcept(int excepts);
43 int fesetexceptflag(const fexcept_t* flagp, int excepts);
44 int fetestexcept(int excepts);
46 int fesetround(int round);
47 int fegetenv(fenv_t* envp);
48 int feholdexcept(fenv_t* envp);
49 int fesetenv(const fenv_t* envp);
50 int feupdateenv(const fenv_t* envp);
55 #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
56 # include <__cxx03/cfenv>
62 # ifndef _LIBCPP_FENV_H
63 # error <cfenv> tried including <fenv.h> but didn't find libc++'s <fenv.h> header. \
64 This usually means that your header search paths are not configured properly. \
65 The header search paths should contain the C++ Standard Library headers before \
66 any C Standard Library, and you are probably using compiler flags that make that \
70 # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
71 # pragma GCC system_header
74 _LIBCPP_BEGIN_NAMESPACE_STD
76 using ::fenv_t _LIBCPP_USING_IF_EXISTS;
77 using ::fexcept_t _LIBCPP_USING_IF_EXISTS;
79 using ::feclearexcept _LIBCPP_USING_IF_EXISTS;
80 using ::fegetexceptflag _LIBCPP_USING_IF_EXISTS;
81 using ::feraiseexcept _LIBCPP_USING_IF_EXISTS;
82 using ::fesetexceptflag _LIBCPP_USING_IF_EXISTS;
83 using ::fetestexcept _LIBCPP_USING_IF_EXISTS;
84 using ::fegetround _LIBCPP_USING_IF_EXISTS;
85 using ::fesetround _LIBCPP_USING_IF_EXISTS;
86 using ::fegetenv _LIBCPP_USING_IF_EXISTS;
87 using ::feholdexcept _LIBCPP_USING_IF_EXISTS;
88 using ::fesetenv _LIBCPP_USING_IF_EXISTS;
89 using ::feupdateenv _LIBCPP_USING_IF_EXISTS;
91 _LIBCPP_END_NAMESPACE_STD
93 #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
95 #endif // _LIBCPP_CFENV