1 /*
   2  * Copyright 2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any 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 }