--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.bytecode/src/com/oracle/jvmci/bytecode/Bytes.java	Wed Jun 03 22:13:10 2015 +0200
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2009, 2011, 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 com.oracle.jvmci.bytecode;
+
+/**
+ * A collection of utility methods for dealing with bytes, particularly in byte arrays.
+ */
+public class Bytes {
+
+    /**
+     * Gets a signed 1-byte value.
+     *
+     * @param data the array containing the data
+     * @param bci the start index of the value to retrieve
+     * @return the signed 1-byte value at index {@code bci} in array {@code data}
+     */
+    public static int beS1(byte[] data, int bci) {
+        return data[bci];
+    }
+
+    /**
+     * Gets a signed 2-byte big-endian value.
+     *
+     * @param data the array containing the data
+     * @param bci the start index of the value to retrieve
+     * @return the signed 2-byte, big-endian, value at index {@code bci} in array {@code data}
+     */
+    public static int beS2(byte[] data, int bci) {
+        return (data[bci] << 8) | (data[bci + 1] & 0xff);
+    }
+
+    /**
+     * Gets an unsigned 1-byte value.
+     *
+     * @param data the array containing the data
+     * @param bci the start index of the value to retrieve
+     * @return the unsigned 1-byte value at index {@code bci} in array {@code data}
+     */
+    public static int beU1(byte[] data, int bci) {
+        return data[bci] & 0xff;
+    }
+
+    /**
+     * Gets an unsigned 2-byte big-endian value.
+     *
+     * @param data the array containing the data
+     * @param bci the start index of the value to retrieve
+     * @return the unsigned 2-byte, big-endian, value at index {@code bci} in array {@code data}
+     */
+    public static int beU2(byte[] data, int bci) {
+        return ((data[bci] & 0xff) << 8) | (data[bci + 1] & 0xff);
+    }
+
+    /**
+     * Gets a signed 4-byte big-endian value.
+     *
+     * @param data the array containing the data
+     * @param bci the start index of the value to retrieve
+     * @return the signed 4-byte, big-endian, value at index {@code bci} in array {@code data}
+     */
+    public static int beS4(byte[] data, int bci) {
+        return (data[bci] << 24) | ((data[bci + 1] & 0xff) << 16) | ((data[bci + 2] & 0xff) << 8) | (data[bci + 3] & 0xff);
+    }
+
+    /**
+     * Gets either a signed 2-byte or a signed 4-byte big-endian value.
+     *
+     * @param data the array containing the data
+     * @param bci the start index of the value to retrieve
+     * @param fourByte if true, this method will return a 4-byte value
+     * @return the signed 2 or 4-byte, big-endian, value at index {@code bci} in array {@code data}
+     */
+    public static int beSVar(byte[] data, int bci, boolean fourByte) {
+        if (fourByte) {
+            return beS4(data, bci);
+        } else {
+            return beS2(data, bci);
+        }
+    }
+}