blob: db23fd980948923df4e36519efcbd01dc4ba621f [file] [log] [blame]
//===-- Unittests for fegetexceptflag and fesetexceptflag -----------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See 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/FEnvUtils.h"
#include "utils/UnitTest/Test.h"
#include <fenv.h>
TEST(LlvmLibcFenvTest, GetExceptFlagAndSetExceptFlag) {
// We will disable all exceptions to prevent invocation of the exception
// handler.
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.
// Make sure that the exception flag is set.
ASSERT_NE(__llvm_libc::fputil::testExcept(FE_ALL_EXCEPT) & e, 0);
fexcept_t eflags;
ASSERT_EQ(__llvm_libc::fegetexceptflag(&eflags, FE_ALL_EXCEPT), 0);
ASSERT_EQ(__llvm_libc::fputil::testExcept(FE_ALL_EXCEPT) & e, 0);
ASSERT_EQ(__llvm_libc::fesetexceptflag(&eflags, FE_ALL_EXCEPT), 0);
ASSERT_NE(__llvm_libc::fputil::testExcept(FE_ALL_EXCEPT) & e, 0);
// Cleanup. We clear all excepts as raising excepts like FE_OVERFLOW
// can also raise FE_INEXACT.
// Next, we will raise one exception and save the flags.
fexcept_t eflags;
__llvm_libc::fegetexceptflag(&eflags, FE_ALL_EXCEPT);
// Clear all exceptions and raise two other exceptions.
__llvm_libc::fputil::raiseExcept(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::testExcept(FE_ALL_EXCEPT), FE_INVALID);