--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.bytecode/src/com/oracle/graal/bytecode/BytecodeLookupSwitch.java	Mon Jun 11 13:51:34 2012 +0200
@@ -0,0 +1,67 @@
+/*
+ * 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.graal.bytecode;
+
+/**
+ * A utility for processing {@link Bytecodes#LOOKUPSWITCH} bytecodes.
+ */
+public class BytecodeLookupSwitch extends BytecodeSwitch {
+    private static final int OFFSET_TO_NUMBER_PAIRS = 4;
+    private static final int OFFSET_TO_FIRST_PAIR_MATCH = 8;
+    private static final int OFFSET_TO_FIRST_PAIR_OFFSET = 12;
+    private static final int PAIR_SIZE = 8;
+
+    /**
+     * Constructor for a {@link BytecodeStream}.
+     * @param stream the {@code BytecodeStream} containing the switch instruction
+     * @param bci the index in the stream of the switch instruction
+     */
+    public BytecodeLookupSwitch(BytecodeStream stream, int bci) {
+        super(stream, bci);
+    }
+
+    @Override
+    public int defaultOffset() {
+        return stream.readInt(alignedBci);
+    }
+
+    @Override
+    public int offsetAt(int i) {
+        return stream.readInt(alignedBci + OFFSET_TO_FIRST_PAIR_OFFSET + PAIR_SIZE * i);
+    }
+
+    @Override
+    public int keyAt(int i) {
+        return stream.readInt(alignedBci + OFFSET_TO_FIRST_PAIR_MATCH + PAIR_SIZE * i);
+    }
+
+    @Override
+    public int numberOfCases() {
+        return stream.readInt(alignedBci + OFFSET_TO_NUMBER_PAIRS);
+    }
+
+    @Override
+    public int size() {
+        return alignedBci + OFFSET_TO_FIRST_PAIR_MATCH + PAIR_SIZE * numberOfCases() - bci;
+    }
+}