--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.word/src/org/graalvm/compiler/word/UnsignedUtils.java	2017-02-15 17:09:43.985747005 -0800
@@ -0,0 +1,88 @@
+/*
+ * 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.word;
+
+/**
+ * Utility methods on Unsigned values.
+ */
+public final class UnsignedUtils {
+
+    private UnsignedUtils() {
+        // This is a class of static methods, so no need for any instances.
+    }
+
+    /**
+     * Round an Unsigned down to the nearest smaller multiple.
+     *
+     * @param that The Unsigned to be rounded down.
+     * @param multiple The multiple to which that Unsigned should be decreased.
+     * @return That Unsigned, but rounded down.
+     */
+    public static Unsigned roundDown(Unsigned that, Unsigned multiple) {
+        return that.unsignedDivide(multiple).multiply(multiple);
+    }
+
+    /**
+     * Round an Unsigned up to the nearest larger multiple.
+     *
+     * @param that The Unsigned to be rounded up.
+     * @param multiple The multiple to which that Unsigned should be increased.
+     * @return That Unsigned, but rounded up.
+     */
+    public static Unsigned roundUp(Unsigned that, Unsigned multiple) {
+        return UnsignedUtils.roundDown(that.add(multiple.subtract(1)), multiple);
+    }
+
+    /**
+     * Check that an Unsigned is an even multiple.
+     *
+     * @param that The Unsigned to be verified as a multiple.
+     * @param multiple The multiple against which the Unsigned should be verified.
+     * @return true if that Unsigned is a multiple, false otherwise.
+     */
+    public static boolean isAMultiple(Unsigned that, Unsigned multiple) {
+        return that.equal(UnsignedUtils.roundDown(that, multiple));
+    }
+
+    /**
+     * The minimum of two Unsigneds.
+     *
+     * @param x An Unsigned.
+     * @param y Another Unsigned.
+     * @return The whichever Unsigned is smaller.
+     */
+    public static Unsigned min(Unsigned x, Unsigned y) {
+        return (x.belowOrEqual(y)) ? x : y;
+    }
+
+    /**
+     * The maximum of two Unsigneds.
+     *
+     * @param x An Unsigned.
+     * @param y Another Unsigned.
+     * @return The whichever Unsigned is larger.
+     */
+    public static Unsigned max(Unsigned x, Unsigned y) {
+        return (x.aboveOrEqual(y)) ? x : y;
+    }
+}