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