1//===-- Floating point environment manipulation functions -------*- C++ -*-===//
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 LLVM_LIBC_SRC___SUPPORT_FPUTIL_FENVIMPL_H
10#define LLVM_LIBC_SRC___SUPPORT_FPUTIL_FENVIMPL_H
11
12#include "hdr/fenv_macros.h"
13#include "hdr/math_macros.h"
14#include "hdr/types/fenv_t.h"
15#include "src/__support/macros/attributes.h" // LIBC_INLINE
16#include "src/__support/macros/properties/architectures.h"
17#include "src/errno/libc_errno.h"
18
19#if defined(LIBC_TARGET_ARCH_IS_AARCH64)
20#if defined(__APPLE__)
21#include "aarch64/fenv_darwin_impl.h"
22#else
23#include "aarch64/FEnvImpl.h"
24#endif
25
26// The extra !defined(APPLE) condition is to cause x86_64 MacOS builds to use
27// the dummy implementations below. Once a proper x86_64 darwin fenv is set up,
28// the apple condition here should be removed.
29#elif defined(LIBC_TARGET_ARCH_IS_X86) && !defined(__APPLE__)
30#include "x86_64/FEnvImpl.h"
31#elif defined(LIBC_TARGET_ARCH_IS_ARM) && defined(__ARM_FP)
32#include "arm/FEnvImpl.h"
33#elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
34#include "riscv/FEnvImpl.h"
35#else
36
37namespace LIBC_NAMESPACE::fputil {
38
39// All dummy functions silently succeed.
40
41LIBC_INLINE int clear_except(int) { return 0; }
42
43LIBC_INLINE int test_except(int) { return 0; }
44
45LIBC_INLINE int get_except() { return 0; }
46
47LIBC_INLINE int set_except(int) { return 0; }
48
49LIBC_INLINE int raise_except(int) { return 0; }
50
51LIBC_INLINE int enable_except(int) { return 0; }
52
53LIBC_INLINE int disable_except(int) { return 0; }
54
55LIBC_INLINE int get_round() { return FE_TONEAREST; }
56
57LIBC_INLINE int set_round(int rounding_mode) {
58 return (rounding_mode == FE_TONEAREST) ? 0 : 1;
59}
60
61LIBC_INLINE int get_env(fenv_t *) { return 0; }
62
63LIBC_INLINE int set_env(const fenv_t *) { return 0; }
64
65} // namespace LIBC_NAMESPACE::fputil
66#endif
67
68namespace LIBC_NAMESPACE::fputil {
69
70LIBC_INLINE int set_except_if_required(int excepts) {
71 if (math_errhandling & MATH_ERREXCEPT)
72 return set_except(excepts);
73 return 0;
74}
75
76LIBC_INLINE int raise_except_if_required(int excepts) {
77 if (math_errhandling & MATH_ERREXCEPT)
78 return raise_except(excepts);
79 return 0;
80}
81
82LIBC_INLINE void set_errno_if_required(int err) {
83 if (math_errhandling & MATH_ERRNO)
84 libc_errno = err;
85}
86
87} // namespace LIBC_NAMESPACE::fputil
88
89#endif // LLVM_LIBC_SRC___SUPPORT_FPUTIL_FENVIMPL_H
90

source code of libc/src/__support/FPUtil/FEnvImpl.h