001/*
002 * Copyright (c) 2012, 2014, 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.hotspot.nodes;
024
025import jdk.internal.jvmci.code.*;
026import jdk.internal.jvmci.meta.*;
027
028import com.oracle.graal.compiler.common.type.*;
029import com.oracle.graal.graph.*;
030import com.oracle.graal.hotspot.*;
031import com.oracle.graal.nodeinfo.*;
032import com.oracle.graal.nodes.calc.*;
033import com.oracle.graal.nodes.spi.*;
034import com.oracle.graal.word.*;
035
036/**
037 * Gets the address of the C++ JavaThread object for the current thread.
038 */
039@NodeInfo
040public final class CurrentJavaThreadNode extends FloatingNode implements LIRLowerable {
041    public static final NodeClass<CurrentJavaThreadNode> TYPE = NodeClass.create(CurrentJavaThreadNode.class);
042
043    protected LIRKind wordKind;
044
045    public CurrentJavaThreadNode(@InjectedNodeParameter WordTypes wordTypes) {
046        this(wordTypes.getWordKind());
047    }
048
049    public CurrentJavaThreadNode(Kind wordKind) {
050        super(TYPE, StampFactory.forKind(wordKind));
051        this.wordKind = LIRKind.value(wordKind);
052    }
053
054    @Override
055    public void generate(NodeLIRBuilderTool gen) {
056        Register rawThread = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).getProviders().getRegisters().getThreadRegister();
057        gen.setResult(this, rawThread.asValue(wordKind));
058    }
059
060    @NodeIntrinsic
061    public static native Word get();
062}