[libc] Rename FEnv.h and refactor subsequent files

[hedingarcia]

Summary

Because Windows's pathnames are not case sensitive,
to avoid include conflicts between our header file FEnv.h and the
one from the C Standard library, <fenv.h>, the prior file was renamed.
The motive for the relabel came to fix this include error in
TestHelpers.cpp since a conflict arose with a file in the same
directory when #include <fenv.h> was being used.

[sivachandra]

I think you should update CMakeLists.txt to reflect this renaming. Also, can you rename DummyFEnv.h to DummyFEnvImpl.h.

[hedingarcia]

[libc] Updated CMakeLists.txt and renamed DummyFEnv.h

[sivachandra]

libc/utils/FPUtil/CMakeLists.txt

8

FEnvImpl.h?

[hedingarcia]

[libc] Made a fix to CMakeLists.txt

libc/src/fenv/feclearexcept.cpp

 //===-- Implementation of feclearexcept function --------------------------===//
 //
 // 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/feclearexcept.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, feclearexcept, (int e)) {
   return fputil::clearExcept(e);
 }
 
 } // namespace __llvm_libc

libc/src/fenv/fegetenv.cpp

 //===-- Implementation of fegetenv function -----------------------------===//
 //
 // 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/fegetenv.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fegetenv, (fenv_t * envp)) {
   return fputil::getEnv(envp);
 }
 
 } // namespace __llvm_libc

libc/src/fenv/fegetexceptflag.cpp

 //===-- Implementation of fegetexceptflag function ------------------------===//
 //
 // 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/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 #include <fenv.h>
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fegetexceptflag, (fexcept_t * flagp, int excepts)) {
   // TODO: Add a compile time check to see if the excepts actually fit in flagp.
   *flagp = static_cast<fexcept_t>(fputil::testExcept(FE_ALL_EXCEPT) & excepts);
   return 0;
 }
 
 } // namespace __llvm_libc

libc/src/fenv/fegetround.cpp

 //===-- Implementation of fegetround function -----------------------------===//
 //
 // 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/fegetround.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fegetround, ()) { return fputil::getRound(); }
 
 } // namespace __llvm_libc

libc/src/fenv/feholdexcept.cpp

 //===-- Implementation of feholdexcept function ---------------------------===//
 //
 // 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/feholdexcept.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 #include <fenv.h>
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, feholdexcept, (fenv_t * envp)) {
   if (fputil::getEnv(envp) != 0)
     return -1;
   fputil::clearExcept(FE_ALL_EXCEPT);
   fputil::disableExcept(FE_ALL_EXCEPT);
   return 0;
 }
 
 } // namespace __llvm_libc

libc/src/fenv/feraiseexcept.cpp

 //===-- Implementation of feraiseexcept function --------------------------===//
 //
 // 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/feraiseexcept.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, feraiseexcept, (int e)) {
   return fputil::raiseExcept(e);
 }
 
 } // namespace __llvm_libc

libc/src/fenv/fesetenv.cpp

 //===-- Implementation of fesetenv function -----------------------------===//
 //
 // 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/fesetenv.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fesetenv, (const fenv_t *envp)) {
   return fputil::setEnv(envp);
 }
 
 } // namespace __llvm_libc

libc/src/fenv/fesetexceptflag.cpp

 //===-- Implementation of fesetexceptflag function ------------------------===//
 //
 // 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/fesetexceptflag.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 #include <fenv.h>
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fesetexceptflag,
                    (const fexcept_t *flagp, int excepts)) {
   // Since the return type of fetestexcept is int, we ensure that fexcept_t

libc/src/fenv/fesetround.cpp

 //===-- Implementation of fesetround function -----------------------------===//
 //
 // 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/fesetround.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fesetround, (int m)) { return fputil::setRound(m); }
 
 } // namespace __llvm_libc

libc/src/fenv/fetestexcept.cpp

 //===-- Implementation of fetestexcept function ---------------------------===//
 //
 // 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/fetestexcept.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, fetestexcept, (int e)) { return fputil::testExcept(e); }
 
 } // namespace __llvm_libc

libc/src/fenv/feupdateenv.cpp

 //===-- Implementation of feupdateenv function ----------------------------===//
 //
 // 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/feupdateenv.h"
 #include "src/__support/common.h"
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 
 #include <fenv.h>
 
 namespace __llvm_libc {
 
 LLVM_LIBC_FUNCTION(int, feupdateenv, (const fenv_t *envp)) {
   int current_excepts = fputil::testExcept(FE_ALL_EXCEPT);
   if (fputil::setEnv(envp) != 0)
     return -1;
   return fputil::raiseExcept(current_excepts);
 }
 
 } // namespace __llvm_libc

libc/test/src/fenv/enabled_exceptions_test.cpp

 //===-- Unittests for feraiseexcept with exceptions enabled ---------------===//
 //
 // 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/feclearexcept.h"
 #include "src/fenv/feraiseexcept.h"
 #include "src/fenv/fetestexcept.h"
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/FPUtil/TestHelpers.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 #include <signal.h>
 
 // This test enables an exception and verifies that raising that exception
 // triggers SIGFPE.

libc/test/src/fenv/exception_flags_test.cpp

 //===-- 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 "utils/FPUtil/FEnv.h"
+#include "utils/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.
   __llvm_libc::fputil::disableExcept(FE_ALL_EXCEPT);

libc/test/src/fenv/exception_status_test.cpp

 //===-- Unittests for feclearexcept, feraiseexcept and fetestexpect -------===//
 //
 // 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/feclearexcept.h"
 #include "src/fenv/feraiseexcept.h"
 #include "src/fenv/fetestexcept.h"
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 
 TEST(LlvmLibcExceptionStatusTest, RaiseAndTest) {
   // This test raises a set of exceptions and checks that the exception
   // status flags are updated. The intention is really not to invoke the
   // exception handler. Hence, we will disable all exceptions at the

libc/test/src/fenv/feclearexcept_test.cpp

 //===-- Unittests for feclearexcept with exceptions enabled ---------------===//
 //
 // 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/feclearexcept.h"
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 #include <stdint.h>
 
 TEST(LlvmLibcFEnvTest, ClearTest) {
   uint16_t excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
                         FE_UNDERFLOW};

libc/test/src/fenv/feholdexcept_test.cpp

 //===-- Unittests for feholdexcept with exceptions enabled ----------------===//
 //
 // 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/feholdexcept.h"
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/FPUtil/TestHelpers.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 
 TEST(LlvmLibcFEnvTest, RaiseAndCrash) {
   int excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
                    FE_UNDERFLOW};

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
 //
 //===----------------------------------------------------------------------===//
 
 #include "src/fenv/feupdateenv.h"
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 #include <signal.h>
 
 TEST(LlvmLibcFEnvTest, UpdateEnvTest) {
   __llvm_libc::fputil::disableExcept(FE_ALL_EXCEPT);
   __llvm_libc::fputil::clearExcept(FE_ALL_EXCEPT);
 
   fenv_t env;
   ASSERT_EQ(__llvm_libc::fputil::getEnv(&env), 0);
   __llvm_libc::fputil::setExcept(FE_INVALID | FE_INEXACT);
   ASSERT_EQ(__llvm_libc::feupdateenv(&env), 0);
   ASSERT_EQ(__llvm_libc::fputil::testExcept(FE_INVALID | FE_INEXACT),
             FE_INVALID | FE_INEXACT);
 }

libc/test/src/fenv/getenv_and_setenv_test.cpp

 //===-- Unittests for fegetenv and fesetenv -------------------------------===//
 //
 // 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/fegetenv.h"
 #include "src/fenv/fesetenv.h"
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 
 TEST(LlvmLibcFenvTest, GetEnvAndSetEnv) {
   // We will disable all exceptions to prevent invocation of the exception
   // handler.
   __llvm_libc::fputil::disableExcept(FE_ALL_EXCEPT);

libc/test/src/math/RIntTest.h

 //===-- Utility class to test different flavors of rint ---------*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_LIBC_TEST_SRC_MATH_RINTTEST_H
 #define LLVM_LIBC_TEST_SRC_MATH_RINTTEST_H
 
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #include "utils/FPUtil/FPBits.h"
 #include "utils/FPUtil/TestHelpers.h"
 #include "utils/MPFRWrapper/MPFRUtils.h"
 #include "utils/UnitTest/Test.h"
 
 #include <fenv.h>
 #include <math.h>
 #include <stdio.h>

libc/test/src/math/RoundToIntegerTest.h

 #include "utils/MPFRWrapper/MPFRUtils.h"
 #include "utils/UnitTest/Test.h"
 
 #include <math.h>
 #if math_errhandling & MATH_ERRNO
 #include <errno.h>
 #endif
 #if math_errhandling & MATH_ERREXCEPT
-#include "utils/FPUtil/FEnv.h"
+#include "utils/FPUtil/FEnvUtils.h"
 #endif
 
 namespace mpfr = __llvm_libc::testing::mpfr;
 
 static constexpr int roundingModes[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,
                                          FE_TONEAREST};
 
 template <typename F, typename I, bool TestModes = false>

libc/utils/FPUtil/CMakeLists.txt

 if(${LIBC_TARGET_ARCHITECTURE_IS_X86})
   set(LONG_DOUBLE_HDR LongDoubleBitsX86.h)
 else()
   set(LONG_DOUBLE_HDR)
 endif()
 
 if(EXISTS ${LIBC_TARGET_ARCHITECTURE})
-  set(FENV_IMPL ${LIBC_TARGET_ARCHITECTURE}/FEnv.h)
+  set(FENV_IMPL ${LIBC_TARGET_ARCHITECTURE}/FEnvImpl.h)
 else()
-  set(FENV_IMPL DummyFEnv.h)
+  set(FENV_IMPL DummyFEnvImpl.h)
 endif()
 
 add_header_library(
   fputil
   HDRS
     ${LONG_DOUBLE_HDR}
     ${FENV_IMPL}
     BasicOperations.h
     DivisionAndRemainderOperations.h
-    FEnv.h
+    FEnvUtils.h
     FloatProperties.h
     FPBits.h
     BasicOperations.h
     ManipulationFunctions.h
     NearestIntegerOperations.h
     NormalFloat.h
     PlatformDefs.h
     PolyEval.h

libc/utils/FPUtil/DummyFEnvImpl.h

 //===-- Dummy floating point environment manipulation functins --*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_UTILS_FPUTIL_DUMMY_FENV_H
-#define LLVM_LIBC_UTILS_FPUTIL_DUMMY_FENV_H
+#ifndef LLVM_LIBC_UTILS_FPUTIL_DUMMY_FENVIMPL_H
+#define LLVM_LIBC_UTILS_FPUTIL_DUMMY_FENVIMPL_H
 
 #include <fenv.h>
 #include <math.h>
 
 namespace __llvm_libc {
 namespace fputil {
 
 // All dummy functions silently succeed.

 
 static inline int getEnv(fenv_t *) { return 0; }
 
 static inline int setEnv(const fenv_t *) { return 0; }
 
 } // namespace fputil
 } // namespace __llvm_libc
 
-#endif // LLVM_LIBC_UTILS_FPUTIL_DUMMY_FENV_H
+#endif // LLVM_LIBC_UTILS_FPUTIL_DUMMY_FENVIMPL_H

libc/utils/FPUtil/FEnvUtils.h

 //===-- Utilities for manipulating floating point environment ---*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_UTILS_FPUTIL_FENV_H
-#define LLVM_LIBC_UTILS_FPUTIL_FENV_H
+#ifndef LLVM_LIBC_UTILS_FPUTIL_FENVUTILS_H
+#define LLVM_LIBC_UTILS_FPUTIL_FENVUTILS_H
 
 #ifdef __x86_64__
-#include "x86_64/FEnv.h"
+#include "x86_64/FEnvImpl.h"
 #elif defined(__aarch64__)
-#include "aarch64/FEnv.h"
+#include "aarch64/FEnvImpl.h"
 #else
-#include "DummyFEnv.h"
+#include "DummyFEnvImpl.h"
 #endif
 
-#endif // LLVM_LIBC_UTILS_FPUTIL_FP_BITS_H
+#endif // LLVM_LIBC_UTILS_FPUTIL_FENVUTILS_H

libc/utils/FPUtil/NearestIntegerOperations.h

 //===-- Nearest integer floating-point operations ---------------*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_LIBC_UTILS_FPUTIL_NEAREST_INTEGER_OPERATIONS_H
 #define LLVM_LIBC_UTILS_FPUTIL_NEAREST_INTEGER_OPERATIONS_H
 
-#include "FEnv.h"
+#include "FEnvUtils.h"
 #include "FPBits.h"
 
 #include "utils/CPP/TypeTraits.h"
 
 #include <math.h>
 #if math_errhandling & MATH_ERRNO
 #include <errno.h>
 #endif

libc/utils/FPUtil/aarch64/FEnvImpl.h

 //===-- aarch64 floating point env manipulation functions -------*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_UTILS_FPUTIL_AARCH64_FENV_H
-#define LLVM_LIBC_UTILS_FPUTIL_AARCH64_FENV_H
+#ifndef LLVM_LIBC_UTILS_FPUTIL_AARCH64_FENVIMPL_H
+#define LLVM_LIBC_UTILS_FPUTIL_AARCH64_FENVIMPL_H
 
 #include <arm_acle.h>
 #include <fenv.h>
 #include <stdint.h>
 
 #include "utils/FPUtil/FPBits.h"
 
 namespace __llvm_libc {
static inline int setEnv(const fenv_t *envp) {
   FEnv::writeControlWord(state->ControlWord);
   FEnv::writeStatusWord(state->StatusWord);
   return 0;
 }
 
 } // namespace fputil
 } // namespace __llvm_libc
 
-#endif // LLVM_LIBC_UTILS_FPUTIL_AARCH64_FENV_H
+#endif // LLVM_LIBC_UTILS_FPUTIL_AARCH64_FENVIMPL_H

libc/utils/FPUtil/x86_64/FEnvImpl.h

 //===-- x86_64 floating point env manipulation functions --------*- C++ -*-===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_UTILS_FPUTIL_X86_64_FENV_H
-#define LLVM_LIBC_UTILS_FPUTIL_X86_64_FENV_H
+#ifndef LLVM_LIBC_UTILS_FPUTIL_X86_64_FENVIMPL_H
+#define LLVM_LIBC_UTILS_FPUTIL_X86_64_FENVIMPL_H
 
 #include <fenv.h>
 #include <stdint.h>
 
 #include "src/__support/sanitizer.h"
 
 namespace __llvm_libc {
 namespace fputil {
static inline int setEnv(const fenv_t *envp) {
   internal::writeMXCSR(state->MXCSR);
   return 0;
 }
 #endif
 
 } // namespace fputil
 } // namespace __llvm_libc
 
-#endif // LLVM_LIBC_UTILS_FPUTIL_X86_64_FENV_H
+#endif // LLVM_LIBC_UTILS_FPUTIL_X86_64_FENVIMPL_H