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gerrit.openfyde.cn / chromium.googlesource.com / external / github.com / llvm / llvm-project / libcxx / 88a30878b9a73053c8faafb04aa9656037bf4c9a / . / include / fenv.h
blob: 7cede4b347c24927200b60dafb5f0e6c9a547bc3 [file] [log] [blame]
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]1// -*- C++ -*-
2//===---------------------------- math.h ----------------------------------===//
3//
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
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_FENV_H
11#define _LIBCPP_FENV_H
12
13
14/*
15 fenv.h synopsis
16
17This entire header is C99 / C++0X
18
19Macros:
20
21 FE_DIVBYZERO
22 FE_INEXACT
23 FE_INVALID
24 FE_OVERFLOW
25 FE_UNDERFLOW
26 FE_ALL_EXCEPT
27 FE_DOWNWARD
28 FE_TONEAREST
29 FE_TOWARDZERO
30 FE_UPWARD
31 FE_DFL_ENV
32
33Types:
34
35 fenv_t
36 fexcept_t
37
38int feclearexcept(int excepts);
39int fegetexceptflag(fexcept_t* flagp, int excepts);
40int feraiseexcept(int excepts);
41int fesetexceptflag(const fexcept_t* flagp, int excepts);
42int fetestexcept(int excepts);
43int fegetround();
44int fesetround(int round);
45int fegetenv(fenv_t* envp);
46int feholdexcept(fenv_t* envp);
47int fesetenv(const fenv_t* envp);
48int feupdateenv(const fenv_t* envp);
49
50
51*/
52
53#include <__config>
54#include_next <fenv.h>
55
56#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
57#pragma GCC system_header
58#endif
59
60#ifdef __cplusplus
61
62extern "C++" {
63
64#ifdef feclearexcept
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]65#undef feclearexcept
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]66#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]67
68#ifdef fegetexceptflag
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]69#undef fegetexceptflag
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]70#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]71
72
73#ifdef feraiseexcept
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]74#undef feraiseexcept
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]75#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]76
77#ifdef fesetexceptflag
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]78#undef fesetexceptflag
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]79#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]80
81
82#ifdef fetestexcept
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]83#undef fetestexcept
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]84#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]85
86#ifdef fegetround
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]87#undef fegetround
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]88#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]89
90#ifdef fesetround
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]91#undef fesetround
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]92#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]93
94#ifdef fegetenv
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]95#undef fegetenv
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]96#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]97
98#ifdef feholdexcept
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]99#undef feholdexcept
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]100#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]101
102
103#ifdef fesetenv
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]104#undef fesetenv
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]105#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]106
107#ifdef feupdateenv
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]108#undef feupdateenv
Eric Fiselierbb9a7a82019-02-12 00:05:14 +0000[diff] [blame]109#endif
Eric Fiselier5dddf722019-02-11 23:47:19 +0000[diff] [blame]110
111} // extern "C++"
112
113#endif // defined(__cplusplus)
114
115#endif // _LIBCPP_FENV_H