/*
* Copyright (c) 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.
*
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package com.oracle.max.graal.hotspot.nodes;
import com.oracle.max.graal.hotspot.*;
import com.oracle.max.graal.nodes.*;
import com.oracle.max.graal.nodes.spi.*;
import com.oracle.max.graal.nodes.type.*;
import com.sun.cri.ci.*;
public abstract class WriteBarrier extends FixedWithNextNode {
public WriteBarrier() {
super(StampFactory.illegal());
}
protected void generateBarrier(CiVariable obj, LIRGeneratorTool gen) {
HotSpotVMConfig config = CompilerImpl.getInstance().getConfig();
CiVariable base = gen.emitUShr(obj, CiConstant.forInt(config.cardtableShift));
long startAddress = config.cardtableStartAddress;
int displacement = 0;
if (((int) startAddress) == startAddress) {
displacement = (int) startAddress;
} else {
base = gen.emitAdd(base, CiConstant.forLong(config.cardtableStartAddress));
}
gen.emitStore(new CiAddress(CiKind.Boolean, base, displacement), CiConstant.FALSE, CiKind.Boolean, false);
}
}