1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
//===-- Unittests for fegetexceptflag and fesetexceptflag -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/fenv/fegetexceptflag.h"
#include "src/fenv/fesetexceptflag.h"
#include "src/__support/FPUtil/FEnvImpl.h"
#include "test/UnitTest/Test.h"
#include <fenv.h>
TEST(LlvmLibcFenvTest, GetExceptFlagAndSetExceptFlag) {
// We will disable all exceptions to prevent invocation of the exception
// handler.
__llvm_libc::fputil::disable_except(FE_ALL_EXCEPT);
__llvm_libc::fputil::clear_except(FE_ALL_EXCEPT);
int excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
FE_UNDERFLOW};
for (int e : excepts) {
// The overall idea is to raise an except and save the exception flags.
// Next, clear the flags and then set the saved exception flags. This
// should set the flag corresponding to the previously raised exception.
__llvm_libc::fputil::raise_except(e);
// Make sure that the exception flag is set.
ASSERT_NE(__llvm_libc::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
fexcept_t eflags;
ASSERT_EQ(__llvm_libc::fegetexceptflag(&eflags, FE_ALL_EXCEPT), 0);
__llvm_libc::fputil::clear_except(e);
ASSERT_EQ(__llvm_libc::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
ASSERT_EQ(__llvm_libc::fesetexceptflag(&eflags, FE_ALL_EXCEPT), 0);
ASSERT_NE(__llvm_libc::fputil::test_except(FE_ALL_EXCEPT) & e, 0);
// Cleanup. We clear all excepts as raising excepts like FE_OVERFLOW
// can also raise FE_INEXACT.
__llvm_libc::fputil::clear_except(FE_ALL_EXCEPT);
}
// Next, we will raise one exception and save the flags.
__llvm_libc::fputil::raise_except(FE_INVALID);
fexcept_t eflags;
__llvm_libc::fegetexceptflag(&eflags, FE_ALL_EXCEPT);
// Clear all exceptions and raise two other exceptions.
__llvm_libc::fputil::clear_except(FE_ALL_EXCEPT);
__llvm_libc::fputil::raise_except(FE_OVERFLOW | FE_INEXACT);
// When we set the flags and test, we should only see FE_INVALID.
__llvm_libc::fesetexceptflag(&eflags, FE_ALL_EXCEPT);
EXPECT_EQ(__llvm_libc::fputil::test_except(FE_ALL_EXCEPT), FE_INVALID);
}
|
