--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.asmdis/src/com/sun/max/asm/AssemblyInstructionEditor.java	Sat Dec 17 19:59:18 2011 +0100
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2007, 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.sun.max.asm;
+
+import com.sun.max.lang.*;
+
+/**
+ * Interface for target code edition. Currently, used by the JIT only, for template-based code generation.
+ * The interface is currently customized to the need of the JIT.
+ */
+public interface AssemblyInstructionEditor {
+
+    /**
+     * Returns the displacement in the edited instruction.
+     * @param displacementWidth the width of the displacement in the instruction
+     * @return  the displacement in the edited instruction
+     */
+    int getIntDisplacement(WordWidth displacementWidth) throws AssemblyException;
+
+    /**
+     * Returns the immediate int value in the edited instruction.
+     * @param displacementWidth the width of the displacement in the instruction
+     * @return  the displacement in the edited instruction
+     */
+    int getIntImmediate(WordWidth immediateWidth) throws AssemblyException;
+
+    /**
+     * Replaces the value of the immediate displacement in a load/store instruction.
+     * The original instruction must have an immediate displacement operand that can hold 8-bit immediate value.
+     * @param displacementWidth width of the displacement in the original instruction
+     * @param withIndex  indicate if the instruction uses a register index.
+     * @param disp8 new value of the displacement.
+     */
+    void fixDisplacement(WordWidth displacementWidth, boolean withIndex, byte disp8);
+
+    /**
+     * Replaces the value of the immediate displacement in a load/store instruction.
+     * The original instruction must have an immediate displacement operand that can hold 32-bit immediate value.
+     * @param disp32
+     * @throws AssemblyException
+     *      if the replacement is not allowed (e.g., the instruction is
+     *      not a load/store with immediate displacement parameter).
+     */
+    void fixDisplacement(WordWidth displacementWidth, boolean withIndex, int disp32) throws AssemblyException;
+
+    /**
+     * Replaces the value of the immediate source operand of an  instruction.
+     * (tested with store instruction only).
+     * @param operandWidth the width of the operand being replaced
+     * @param imm8 the new immediate value of the operand.
+     */
+    void fixImmediateOperand(WordWidth operandWidth, byte imm8);
+
+    /**
+     * Replaces the value of the immediate source operand of an  instruction.
+     * (tested with store instruction only).
+     * @param operandWidth the width of the operand being replaced
+     * @param imm16 the new immediate value of the operand.
+     */
+    void fixImmediateOperand(WordWidth operandWidth, short imm16);
+
+    /**
+     * Replaces the value of the immediate source operand of an  instruction.
+     * (tested with store instruction only).
+     * @param operandWidth the width of the operand being replaced
+     * @param imm32 the new immediate value of the operand.
+     */
+    void fixImmediateOperand(WordWidth operandWidth, int imm32);
+
+    /**
+     * Replaces the value of the immediate source operand of an  instruction.
+     * @param imm64 the new immediate value of the operand.
+     */
+    void fixImmediateOperand(int imm32);
+
+    /**
+     * Replaces the value of the immediate source operand of an  instruction.
+     * @param imm64 the new immediate value of the operand.
+     */
+    void fixImmediateOperand(long imm64);
+
+    /**
+     * Fix relative displacement of a branch instruction.
+     * 
+     * @param originalDisplacementWidth
+     * @param displacementWidth width of the relative displacement in the original instruction
+     * @param disp32 new relative displacement
+     */
+    void fixBranchRelativeDisplacement(WordWidth displacementWidth, int disp32) throws AssemblyException;
+}