1 /*

     2  * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 package sun.jvm.hotspot.asm.sparc;

    26 

    27 import sun.jvm.hotspot.asm.*;

    28 

    29 public class SPARCLoadInstruction extends SPARCMemoryInstruction

    30     implements LoadInstruction {

    31     final protected SPARCRegister register2; // used for double word load instructions

    32     final protected Register[] loadDestinations;

    33 

    34     public SPARCLoadInstruction(String name, int opcode, SPARCRegisterIndirectAddress address, SPARCRegister register, int dataType) {

    35         super(name, opcode,address, register, dataType);

    36         if (opcode == LDD || opcode == LDDA) {

    37             int nextRegNum = (register.getNumber() + 1) % SPARCRegisters.NUM_REGISTERS;

    38             register2 = SPARCRegisters.getRegister(nextRegNum);

    39             loadDestinations = new Register[2];

    40             loadDestinations[0] = register;

    41             loadDestinations[1] = register2;

    42         } else {

    43             register2 = null;

    44             loadDestinations = new Register[1];

    45             loadDestinations[0] = register;

    46         }

    47     }

    48 

    49     protected String getDescription() {

    50         StringBuffer buf = new StringBuffer();

    51         buf.append(getName());

    52         buf.append(spaces);

    53         buf.append(address.toString());

    54         buf.append(comma);

    55         buf.append(register.toString());

    56         return buf.toString();

    57     }

    58 

    59     public Register[] getLoadDestinations() {

    60         return loadDestinations;

    61     }

    62 

    63     public Address getLoadSource() {

    64         return address;

    65     }

    66 

    67     public boolean isLoad() {

    68         return true;

    69     }

    70 }