/*
 * Copyright (c) 2010 Sun Microsystems, Inc.  All rights reserved.
 *
 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
 * that is described in this document. In particular, and without limitation, these intellectual property
 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
 * more additional patents or pending patent applications in the U.S. and in other countries.
 *
 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
 * supplements.
 *
 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
 * U.S. and other countries.
 *
 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
 * Company, Ltd.
 */
package com.sun.hotspot.c1x;

import com.sun.cri.ci.*;

/**
 * Used to communicate configuration details, runtime offsets, etc. to c1x upon compileMethod.
 *
 * @author Lukas Stadler
 */
public class HotSpotVMConfig implements CompilerObject {

    // os information, register layout, code generation, ...
    public boolean windowsOs;
    public int codeEntryAlignment;

    // offsets, ...
    public int vmPageSize;
    public int stackShadowPages;
    public int hubOffset;
    public int arrayLengthOffset;
    public int klassStateOffset;
    public int klassStateFullyInitialized;
    public int[] arrayOffsets;
    public int arrayClassElementOffset;
    public int threadTlabTopOffset;
    public int threadTlabEndOffset;
    public int instanceHeaderPrototypeOffset;
    public int threadExceptionOopOffset;
    public int threadExceptionPcOffset;
    public int threadMultiNewArrayStorage;
    public long cardtableStartAddress;
    public int cardtableShift;
    public long safepointPollingAddress;

    // runtime stubs
    public long debugStub;
    public long instanceofStub;
    public long newInstanceStub;
    public long unresolvedNewInstanceStub;
    public long newTypeArrayStub;
    public long newObjectArrayStub;
    public long newMultiArrayStub;
    public long loadKlassStub;
    public long accessFieldStub;
    public long resolveStaticCallStub;
    public long inlineCacheMissStub;
    public long unwindExceptionStub;
    public long handleExceptionStub;
    public long throwClassCastException;
    public long throwArrayStoreException;
    public long throwArrayIndexException;
    public long monitorEnterStub;
    public long monitorExitStub;

    public void check() {
        assert vmPageSize >= 16;
        assert codeEntryAlignment > 0;
        assert stackShadowPages > 0;
    }

    public int getArrayOffset(CiKind kind) {
        return arrayOffsets[getKindNumber(kind)];
    }

    private int getKindNumber(CiKind kind) {
        if (kind == CiKind.Boolean) {
            return 0;
        } else if (kind == CiKind.Byte) {
            return 1;
        } else if (kind == CiKind.Short) {
            return 2;
        } else if (kind == CiKind.Char) {
            return 3;
        } else if (kind == CiKind.Int) {
            return 4;
        } else if (kind == CiKind.Float) {
            return 5;
        } else if (kind == CiKind.Long) {
            return 6;
        } else if (kind == CiKind.Double) {
            return 7;
        } else if (kind == CiKind.Object) {
            return 8;
        } else {
            throw new RuntimeException(kind + " is not a Java kind");
        }
    }
}