1//===-- FEnvSafeTest.cpp ---------------------------------------*- 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#include "FEnvSafeTest.h"
10
11#include "src/__support/FPUtil/FEnvImpl.h"
12#include "src/__support/macros/config.h"
13#include "src/__support/macros/properties/architectures.h"
14
15namespace LIBC_NAMESPACE_DECL {
16namespace testing {
17
18void FEnvSafeTest::PreserveFEnv::check() {
19 fenv_t after;
20 test.get_fenv(after);
21 test.expect_fenv_eq(before, after);
22}
23
24void FEnvSafeTest::TearDown() {
25 if (!should_be_unchanged) {
26 restore_fenv();
27 }
28}
29
30void FEnvSafeTest::get_fenv(fenv_t &fenv) {
31 ASSERT_EQ(LIBC_NAMESPACE::fputil::get_env(&fenv), 0);
32}
33
34void FEnvSafeTest::set_fenv(const fenv_t &fenv) {
35 ASSERT_EQ(LIBC_NAMESPACE::fputil::set_env(&fenv), 0);
36}
37
38void FEnvSafeTest::expect_fenv_eq(const fenv_t &before_fenv,
39 const fenv_t &after_fenv) {
40#if defined(LIBC_TARGET_ARCH_IS_AARCH64)
41 using FPState = LIBC_NAMESPACE::fputil::FEnv::FPState;
42 const FPState &before_state = reinterpret_cast<const FPState &>(before_fenv);
43 const FPState &after_state = reinterpret_cast<const FPState &>(after_fenv);
44
45 EXPECT_EQ(before_state.ControlWord, after_state.ControlWord);
46 EXPECT_EQ(before_state.StatusWord, after_state.StatusWord);
47
48#elif defined(LIBC_TARGET_ARCH_IS_X86) && !defined(__APPLE__)
49 using LIBC_NAMESPACE::fputil::internal::FPState;
50 const FPState &before_state = reinterpret_cast<const FPState &>(before_fenv);
51 const FPState &after_state = reinterpret_cast<const FPState &>(after_fenv);
52
53#if defined(_WIN32)
54 EXPECT_EQ(before_state.control_word, after_state.control_word);
55 EXPECT_EQ(before_state.status_word, after_state.status_word);
56#elif defined(__APPLE__)
57 EXPECT_EQ(before_state.control_word, after_state.control_word);
58 EXPECT_EQ(before_state.status_word, after_state.status_word);
59 EXPECT_EQ(before_state.mxcsr, after_state.mxcsr);
60#else
61 EXPECT_EQ(before_state.x87_status.control_word,
62 after_state.x87_status.control_word);
63 EXPECT_EQ(before_state.x87_status.status_word,
64 after_state.x87_status.status_word);
65 EXPECT_EQ(before_state.mxcsr, after_state.mxcsr);
66#endif
67
68#elif defined(LIBC_TARGET_ARCH_IS_ARM) && defined(__ARM_FP)
69 using LIBC_NAMESPACE::fputil::FEnv;
70 const FEnv &before_state = reinterpret_cast<const FEnv &>(before_fenv);
71 const FEnv &after_state = reinterpret_cast<const FEnv &>(after_fenv);
72
73 EXPECT_EQ(before_state.fpscr, after_state.fpscr);
74
75#elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
76 const uint32_t &before_fcsr = reinterpret_cast<const uint32_t &>(before_fenv);
77 const uint32_t &after_fcsr = reinterpret_cast<const uint32_t &>(after_fenv);
78 EXPECT_EQ(before_fcsr, after_fcsr);
79
80#else
81 // No arch-specific `fenv_t` support, so nothing to compare.
82
83#endif
84}
85
86} // namespace testing
87} // namespace LIBC_NAMESPACE_DECL
88

source code of libc/test/UnitTest/FEnvSafeTest.cpp