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 "src/fenv/fegetenv.h"
10 #include "src/fenv/fesetenv.h"
11 
12 #include "utils/FPUtil/FEnv.h"
13 #include "utils/UnitTest/Test.h"
14 
15 #include <fenv.h>
16 
17 TEST(LlvmLibcFenvTest, GetEnvAndSetEnv) {
18   // We will disable all exceptions to prevent invocation of the exception
19   // handler.
20   __llvm_libc::fputil::disableExcept(FE_ALL_EXCEPT);
21 
22   int excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
23                    FE_UNDERFLOW};
24 
25   for (int e : excepts) {
26     __llvm_libc::fputil::clearExcept(FE_ALL_EXCEPT);
27 
28     // Save the cleared environment.
29     fenv_t env;
30     ASSERT_EQ(__llvm_libc::fegetenv(&env), 0);
31 
32     __llvm_libc::fputil::raiseExcept(e);
33     // Make sure that the exception is raised.
34     ASSERT_NE(__llvm_libc::fputil::testExcept(FE_ALL_EXCEPT) & e, 0);
35 
36     ASSERT_EQ(__llvm_libc::fesetenv(&env), 0);
37     ASSERT_EQ(__llvm_libc::fputil::testExcept(FE_ALL_EXCEPT) & e, 0);
38   }
39 }
40