libc/test/src/fenv/feupdateenv_test.cpp

//===-- Unittests for feupdateenv -----------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#undef LIBC_MATH_USE_SYSTEM_FENV

#include "hdr/types/fenv_t.h"
#include "src/fenv/feupdateenv.h"

#include "src/__support/FPUtil/FEnvImpl.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/Test.h"

using LlvmLibcFEnvTest = LIBC_NAMESPACE::testing::FEnvSafeTest;

TEST_F(LlvmLibcFEnvTest, UpdateEnvTest) {
#if defined(LIBC_TARGET_ARCH_IS_ANY_ARM) && !defined(__ARM_FP)
  // Unsupported: no fenv
#else
  LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
  LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);

  fenv_t env;
  ASSERT_EQ(LIBC_NAMESPACE::fputil::get_env(&env), 0);
  LIBC_NAMESPACE::fputil::set_except(FE_INVALID | FE_INEXACT);
  ASSERT_EQ(LIBC_NAMESPACE::feupdateenv(&env), 0);
  ASSERT_EQ(LIBC_NAMESPACE::fputil::test_except(FE_INVALID | FE_INEXACT),
            FE_INVALID | FE_INEXACT);
#endif // defined(LIBC_TARGET_ARCH_IS_ANY_ARM) && !defined(__ARM_FP)
}