--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libc/fuzzing/math/Compare.h	Tue Jun 08 06:07:14 2021 +0900
@@ -0,0 +1,35 @@
+//===-- Template functions to compare scalar values -------------*- 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_FUZZING_MATH_COMPARE_H
+#define LLVM_LIBC_FUZZING_MATH_COMPARE_H
+
+#include "utils/CPP/TypeTraits.h"
+#include "utils/FPUtil/FPBits.h"
+
+template <typename T>
+__llvm_libc::cpp::EnableIfType<__llvm_libc::cpp::IsFloatingPointType<T>::Value,
+                               bool>
+ValuesEqual(T x1, T x2) {
+  __llvm_libc::fputil::FPBits<T> bits1(x1);
+  __llvm_libc::fputil::FPBits<T> bits2(x2);
+  // If either is NaN, we want both to be NaN.
+  if (bits1.isNaN() || bits2.isNaN())
+    return bits2.isNaN() && bits2.isNaN();
+
+  // For all other values, we want the values to be bitwise equal.
+  return bits1.uintval() == bits2.uintval();
+}
+
+template <typename T>
+__llvm_libc::cpp::EnableIfType<__llvm_libc::cpp::IsIntegral<T>::Value, bool>
+ValuesEqual(T x1, T x2) {
+  return x1 == x1;
+}
+
+#endif // LLVM_LIBC_FUZZING_MATH_COMPARE_H