1//===-- Unittests for fegetenv and fesetenv -------------------------------===//
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 "hdr/types/fenv_t.h"
10#include "src/fenv/fegetenv.h"
11#include "src/fenv/fegetround.h"
12#include "src/fenv/fesetenv.h"
13#include "src/fenv/fesetround.h"
14
15#include "src/__support/FPUtil/FEnvImpl.h"
16#include "src/__support/macros/properties/os.h"
17#include "test/UnitTest/FEnvSafeTest.h"
18#include "test/UnitTest/Test.h"
19
20#include "excepts.h"
21
22using LlvmLibcFEnvTest = LIBC_NAMESPACE::testing::FEnvSafeTest;
23
24#ifndef LIBC_TARGET_OS_IS_WINDOWS
25TEST_F(LlvmLibcFEnvTest, GetEnvAndSetEnv) {
26 // We will disable all exceptions to prevent invocation of the exception
27 // handler.
28 LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
29
30 for (int e : EXCEPTS) {
31 LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
32
33 // Save the cleared environment.
34 fenv_t env;
35 ASSERT_EQ(LIBC_NAMESPACE::fegetenv(&env), 0);
36
37 LIBC_NAMESPACE::fputil::raise_except(e);
38 // Make sure that the exception is raised.
39 ASSERT_NE(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
40
41 ASSERT_EQ(LIBC_NAMESPACE::fesetenv(&env), 0);
42 ASSERT_EQ(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
43 }
44}
45
46TEST_F(LlvmLibcFEnvTest, Set_FE_DFL_ENV) {
47 // We will disable all exceptions to prevent invocation of the exception
48 // handler.
49 LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
50
51 int excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
52 FE_UNDERFLOW};
53
54 for (int e : excepts) {
55 LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
56
57 // Save the cleared environment.
58 fenv_t env;
59 ASSERT_EQ(LIBC_NAMESPACE::fegetenv(&env), 0);
60
61 LIBC_NAMESPACE::fputil::raise_except(e);
62 // Make sure that the exception is raised.
63 ASSERT_NE(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
64
65 ASSERT_EQ(LIBC_NAMESPACE::fesetenv(FE_DFL_ENV), 0);
66 // Setting the default env should clear all exceptions.
67 ASSERT_EQ(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
68 }
69
70 ASSERT_EQ(LIBC_NAMESPACE::fesetround(FE_DOWNWARD), 0);
71 ASSERT_EQ(LIBC_NAMESPACE::fesetenv(FE_DFL_ENV), 0);
72 // Setting the default env should set rounding mode to FE_TONEAREST.
73 int rm = LIBC_NAMESPACE::fegetround();
74 EXPECT_EQ(rm, FE_TONEAREST);
75}
76#endif
77
78#ifdef LIBC_TARGET_OS_IS_WINDOWS
79TEST_F(LlvmLibcFEnvTest, Windows_Set_Get_Test) {
80 // If a valid fenv_t is written, then reading it back out should be identical.
81 fenv_t setEnv = {0x7e00053e, 0x0f00000f};
82 fenv_t getEnv;
83 ASSERT_EQ(LIBC_NAMESPACE::fesetenv(&setEnv), 0);
84 ASSERT_EQ(LIBC_NAMESPACE::fegetenv(&getEnv), 0);
85
86 ASSERT_EQ(setEnv._Fe_ctl, getEnv._Fe_ctl);
87 ASSERT_EQ(setEnv._Fe_stat, getEnv._Fe_stat);
88}
89#endif
90

source code of libc/test/src/fenv/getenv_and_setenv_test.cpp