--- /dev/null	2017-03-07 11:44:12.271151064 +0100
+++ new/src/share/vm/utilities/traits/integer.hpp	2017-04-25 16:46:41.235170796 +0200
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_UTILITIES_TRAITS_INTEGER_HPP
+#define SHARE_VM_UTILITIES_TRAITS_INTEGER_HPP
+
+#include "memory/allocation.hpp"
+
+namespace IntegerTypeImpl {
+  template <size_t size>
+  struct SignedType: AllStatic {};
+
+  template <>
+  struct SignedType<sizeof(int64_t)>: AllStatic {
+    typedef int64_t type;
+  };
+
+  template <>
+  struct SignedType<sizeof(int32_t)>: AllStatic {
+    typedef int32_t type;
+  };
+
+  template <>
+  struct SignedType<sizeof(int16_t)>: AllStatic {
+    typedef int16_t type;
+  };
+
+  template <>
+  struct SignedType<sizeof(int8_t)>: AllStatic {
+    typedef signed char type;
+  };
+
+  template <size_t size>
+  struct UnsignedType: AllStatic {};
+
+  template <>
+  struct UnsignedType<sizeof(uint64_t)>: AllStatic {
+    typedef uint64_t type;
+  };
+
+  template <>
+  struct UnsignedType<sizeof(uint32_t)>: AllStatic {
+    typedef uint32_t type;
+  };
+
+  template <>
+  struct UnsignedType<sizeof(uint16_t)>: AllStatic {
+    typedef uint16_t type;
+  };
+
+  template <>
+  struct UnsignedType<sizeof(uint8_t)>: AllStatic {
+    typedef unsigned char type;
+  };
+}
+
+template <typename T>
+struct IsPointerSize: AllStatic {
+  enum {
+    value = sizeof(T) == sizeof(void*)
+  };
+};
+
+template <typename T>
+struct IntegerType: AllStatic {
+  typedef typename IntegerTypeImpl::SignedType<sizeof(T)>::type signed_type;
+  typedef typename IntegerTypeImpl::UnsignedType<sizeof(T)>::type unsigned_type;
+
+  static signed_type cast_to_signed(T val) {
+    return *(signed_type*)&val;
+  }
+
+  static T cast_from_signed(signed_type val) {
+    return *(T*)&val;
+  }
+
+  static unsigned_type cast_to_unsigned(T val) {
+    return *(unsigned_type*)&val;
+  }
+
+  static T cast_from_unsigned(unsigned_type val) {
+    return *(T*)&val;
+  }
+};
+
+#endif // SHARE_VM_UTILITIES_TRAITS_INTEGER_HPP