hotspot/agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCStoreInstruction.java

/*
 * Copyright 2002 Sun Microsystems, Inc.  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.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

package sun.jvm.hotspot.asm.sparc;

import sun.jvm.hotspot.asm.*;

public class SPARCStoreInstruction extends SPARCMemoryInstruction
    implements StoreInstruction {
    final protected SPARCRegister register2; // used by double word store instructions
    final protected Register[] storeSources;

    public SPARCStoreInstruction(String name, int opcode, SPARCRegisterIndirectAddress address, SPARCRegister register, int dataType) {
        super(name, opcode, address, register, dataType);
        if (opcode == STD || opcode == STDA) {
            storeSources = new Register[2];
            storeSources[0] = register;
            int nextRegNum = (register.getNumber() + 1) % SPARCRegisters.NUM_REGISTERS;
            register2 = SPARCRegisters.getRegister(nextRegNum);
            storeSources[1] = register2;
        } else {
            storeSources = new Register[1];
            storeSources[0] = register;
            register2 = null;
        }
    }

    private String defaultInitDescription(StringBuffer buf) {
        buf.append(getName());
        buf.append(spaces);
        buf.append(register.toString());
        buf.append(comma);
        buf.append(address.toString());
        return buf.toString();
    }

    protected String getDescription() {
        StringBuffer buf = new StringBuffer();
        if (register == SPARCRegisters.G0) {
            switch (opcode) {
                case ST:
                    buf.append("clr");
                    break;
                case STH:
                    buf.append("clrh");
                    break;
                case STB:
                    buf.append("clrb");
                    break;
                default:
                    return defaultInitDescription(buf);
            }
            buf.append(spaces);
            buf.append(address.toString());
            return buf.toString();
        } else {
            return defaultInitDescription(buf);
        }
    }

    public int getDataType() {
        return dataType;
    }

    public Address getStoreDestination() {
        return address;
    }

    public Register[] getStoreSources() {
        return storeSources;
    }

    public boolean isStore() {
        return true;
    }
}