001/*
002 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes.java;
024
025import jdk.internal.jvmci.meta.*;
026import sun.misc.*;
027
028import com.oracle.graal.compiler.common.type.*;
029import com.oracle.graal.graph.*;
030import com.oracle.graal.nodeinfo.*;
031import com.oracle.graal.nodes.*;
032import com.oracle.graal.nodes.memory.*;
033import com.oracle.graal.nodes.memory.address.*;
034import com.oracle.graal.nodes.spi.*;
035
036/**
037 * Represents an atomic read-and-add operation like {@link Unsafe#getAndAddInt(Object, long, int)}.
038 */
039@NodeInfo(allowedUsageTypes = {InputType.Memory})
040public final class AtomicReadAndAddNode extends AbstractMemoryCheckpoint implements LIRLowerable, MemoryCheckpoint.Single {
041
042    public static final NodeClass<AtomicReadAndAddNode> TYPE = NodeClass.create(AtomicReadAndAddNode.class);
043    @Input(InputType.Association) AddressNode address;
044    @Input ValueNode delta;
045
046    protected final LocationIdentity locationIdentity;
047
048    public AtomicReadAndAddNode(AddressNode address, ValueNode delta, LocationIdentity locationIdentity) {
049        super(TYPE, StampFactory.forKind(delta.getKind()));
050        this.address = address;
051        this.delta = delta;
052        this.locationIdentity = locationIdentity;
053    }
054
055    public ValueNode delta() {
056        return delta;
057    }
058
059    public LocationIdentity getLocationIdentity() {
060        return locationIdentity;
061    }
062
063    public void generate(NodeLIRBuilderTool gen) {
064        Value result = gen.getLIRGeneratorTool().emitAtomicReadAndAdd(gen.operand(address), gen.operand(delta));
065        gen.setResult(this, result);
066    }
067}