--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.asm.amd64/src/com/oracle/jvmci/asm/amd64/AMD64Address.java	Wed Jun 03 18:06:44 2015 +0200
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2010, 2013, 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.asm.amd64;
+
+import com.oracle.jvmci.code.Register;
+import com.oracle.jvmci.code.AbstractAddress;
+
+/**
+ * Represents an address in target machine memory, specified via some combination of a base
+ * register, an index register, a displacement and a scale. Note that the base and index registers
+ * may be a variable that will get a register assigned later by the register allocator.
+ */
+public final class AMD64Address extends AbstractAddress {
+
+    private final Register base;
+    private final Register index;
+    private final Scale scale;
+    private final int displacement;
+
+    /**
+     * Creates an {@link AMD64Address} with given base register, no scaling and no displacement.
+     *
+     * @param base the base register
+     */
+    public AMD64Address(Register base) {
+        this(base, Register.None, Scale.Times1, 0);
+    }
+
+    /**
+     * Creates an {@link AMD64Address} with given base register, no scaling and a given
+     * displacement.
+     *
+     * @param base the base register
+     * @param displacement the displacement
+     */
+    public AMD64Address(Register base, int displacement) {
+        this(base, Register.None, Scale.Times1, displacement);
+    }
+
+    /**
+     * Creates an {@link AMD64Address} with given base and index registers, scaling and
+     * displacement. This is the most general constructor.
+     *
+     * @param base the base register
+     * @param index the index register
+     * @param scale the scaling factor
+     * @param displacement the displacement
+     */
+    public AMD64Address(Register base, Register index, Scale scale, int displacement) {
+        this.base = base;
+        this.index = index;
+        this.scale = scale;
+        this.displacement = displacement;
+
+        assert scale != null;
+    }
+
+    /**
+     * A scaling factor used in the SIB addressing mode.
+     */
+    public enum Scale {
+        Times1(1, 0),
+        Times2(2, 1),
+        Times4(4, 2),
+        Times8(8, 3);
+
+        private Scale(int value, int log2) {
+            this.value = value;
+            this.log2 = log2;
+        }
+
+        /**
+         * The value (or multiplier) of this scale.
+         */
+        public final int value;
+
+        /**
+         * The {@linkplain #value value} of this scale log 2.
+         */
+        public final int log2;
+
+        public static Scale fromInt(int scale) {
+            switch (scale) {
+                case 1:
+                    return Times1;
+                case 2:
+                    return Times2;
+                case 4:
+                    return Times4;
+                case 8:
+                    return Times8;
+                default:
+                    return null;
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder s = new StringBuilder();
+        s.append("[");
+        String sep = "";
+        if (!getBase().equals(Register.None)) {
+            s.append(getBase());
+            sep = " + ";
+        }
+        if (!getIndex().equals(Register.None)) {
+            s.append(sep).append(getIndex()).append(" * ").append(getScale().value);
+            sep = " + ";
+        }
+        if (getDisplacement() < 0) {
+            s.append(" - ").append(-getDisplacement());
+        } else if (getDisplacement() > 0) {
+            s.append(sep).append(getDisplacement());
+        }
+        s.append("]");
+        return s.toString();
+    }
+
+    /**
+     * @return Base register that defines the start of the address computation. If not present, is
+     *         denoted by {@link Register#None}.
+     */
+    public Register getBase() {
+        return base;
+    }
+
+    /**
+     * @return Index register, the value of which (possibly scaled by {@link #getScale}) is added to
+     *         {@link #getBase}. If not present, is denoted by {@link Register#None}.
+     */
+    public Register getIndex() {
+        return index;
+    }
+
+    /**
+     * @return Scaling factor for indexing, dependent on target operand size.
+     */
+    public Scale getScale() {
+        return scale;
+    }
+
+    /**
+     * @return Optional additive displacement.
+     */
+    public int getDisplacement() {
+        return displacement;
+    }
+}