--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/Negate.java	Tue Jun 07 12:10:27 2011 +0200
@@ -0,0 +1,106 @@
+/*
+ * 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.sun.c1x.ir;
+
+import com.oracle.graal.graph.*;
+import com.sun.c1x.debug.*;
+import com.sun.c1x.util.*;
+import com.sun.cri.bytecode.*;
+import com.sun.cri.ci.*;
+
+/**
+ * The {@code NegateOp} instruction negates its operand.
+ */
+public final class Negate extends FloatingNode {
+
+    private static final int INPUT_COUNT = 2;
+    private static final int INPUT_X = 0;
+    private static final int INPUT_Y = 1;
+
+    private static final int SUCCESSOR_COUNT = 0;
+
+    @Override
+    protected int inputCount() {
+        return super.inputCount() + INPUT_COUNT;
+    }
+
+    @Override
+    protected int successorCount() {
+        return super.successorCount() + SUCCESSOR_COUNT;
+    }
+
+    /**
+     * The instruction producing input to this instruction.
+     */
+     public Value x() {
+        return (Value) inputs().get(super.inputCount() + INPUT_X);
+    }
+
+    public Value setX(Value n) {
+        return (Value) inputs().set(super.inputCount() + INPUT_X, n);
+    }
+
+    /**
+     * Creates new NegateOp instance.
+     * @param x the instruction producing the value that is input to this instruction
+     */
+    public Negate(Value x, Graph graph) {
+        super(x.kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
+        setX(x);
+    }
+
+    // for copying
+    private Negate(CiKind kind, Graph graph) {
+        super(kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
+    }
+
+    @Override
+    public void accept(ValueVisitor v) {
+        v.visitNegate(this);
+    }
+
+    @Override
+    public int valueNumber() {
+        return Util.hash1(Bytecodes.INEG, x());
+    }
+
+    @Override
+    public boolean valueEqual(Node i) {
+        if (i instanceof Negate) {
+            Negate o = (Negate) i;
+            return x() == o.x();
+        }
+        return false;
+    }
+
+    @Override
+    public void print(LogStream out) {
+        out.print("- ").print(x());
+    }
+
+    @Override
+    public Node copy(Graph into) {
+        Negate x = new Negate(kind, into);
+        return x;
+    }
+}