--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/util/TypeConversion.java	2017-02-15 16:57:16.490131840 -0800
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2015, 2015, 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.
+ */
+package org.graalvm.compiler.core.common.util;
+
+/**
+ * Provides low-level value checks and conversion for signed and unsigned values of size 1, 2, and 4
+ * bytes.
+ */
+public class TypeConversion {
+
+    public static boolean isS1(long value) {
+        return value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE;
+    }
+
+    public static boolean isU1(long value) {
+        return value >= 0 && value <= 0xFF;
+    }
+
+    public static boolean isS2(long value) {
+        return value >= Short.MIN_VALUE && value <= Short.MAX_VALUE;
+    }
+
+    public static boolean isU2(long value) {
+        return value >= 0 && value <= 0xFFFF;
+    }
+
+    public static boolean isS4(long value) {
+        return value >= Integer.MIN_VALUE && value <= Integer.MAX_VALUE;
+    }
+
+    public static boolean isU4(long value) {
+        return value >= 0 && value <= 0xFFFFFFFFL;
+    }
+
+    public static byte asS1(long value) {
+        assert isS1(value);
+        return (byte) value;
+    }
+
+    public static byte asU1(long value) {
+        assert isU1(value);
+        return (byte) value;
+    }
+
+    public static short asS2(long value) {
+        assert isS2(value);
+        return (short) value;
+    }
+
+    public static short asU2(long value) {
+        assert isU2(value);
+        return (short) value;
+    }
+
+    public static int asS4(long value) {
+        assert isS4(value);
+        return (int) value;
+    }
+
+    public static int asU4(long value) {
+        assert isU4(value);
+        return (int) value;
+    }
+}