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.hotspot.amd64;
024
025import jdk.internal.jvmci.code.*;
026import jdk.internal.jvmci.hotspot.*;
027import jdk.internal.jvmci.meta.*;
028
029import com.oracle.graal.asm.amd64.*;
030import com.oracle.graal.hotspot.*;
031import com.oracle.graal.lir.*;
032import com.oracle.graal.lir.amd64.*;
033import com.oracle.graal.lir.asm.*;
034
035public final class AMD64HotSpotCardTableShiftOp extends AMD64LIRInstruction {
036    public static final LIRInstructionClass<AMD64HotSpotCardTableShiftOp> TYPE = LIRInstructionClass.create(AMD64HotSpotCardTableShiftOp.class);
037
038    @Def({OperandFlag.REG, OperandFlag.ILLEGAL}) private AllocatableValue result;
039
040    private final HotSpotVMConfig config;
041
042    public AMD64HotSpotCardTableShiftOp(AllocatableValue result, HotSpotVMConfig config) {
043        super(TYPE);
044        this.result = result;
045        this.config = config;
046    }
047
048    @Override
049    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler asm) {
050        Kind hostWordKind = HotSpotGraalRuntime.getHostWordKind();
051        int alignment = Kind.Int.getBitCount() / Byte.SIZE;
052        JavaConstant shift = JavaConstant.forIntegerKind(hostWordKind, 0);
053        // recordDataReferenceInCode forces the mov to be rip-relative
054        asm.movq(ValueUtil.asRegister(result), (AMD64Address) crb.recordDataReferenceInCode(shift, alignment));
055        crb.recordMark(config.MARKID_CARD_TABLE_SHIFT);
056    }
057}