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 SPARCStoreInstruction extends SPARCMemoryInstruction
  30     implements StoreInstruction {
  31     final protected SPARCRegister register2; // used by double word store instructions
  32     final protected Register[] storeSources;
  33 
  34     public SPARCStoreInstruction(String name, int opcode, SPARCRegisterIndirectAddress address, SPARCRegister register, int dataType) {
  35         super(name, opcode, address, register, dataType);
  36         if (opcode == STD || opcode == STDA) {
  37             storeSources = new Register[2];
  38             storeSources[0] = register;
  39             int nextRegNum = (register.getNumber() + 1) % SPARCRegisters.NUM_REGISTERS;
  40             register2 = SPARCRegisters.getRegister(nextRegNum);
  41             storeSources[1] = register2;
  42         } else {
  43             storeSources = new Register[1];
  44             storeSources[0] = register;
  45             register2 = null;
  46         }
  47     }
  48 
  49     private String defaultInitDescription(StringBuffer buf) {
  50         buf.append(getName());
  51         buf.append(spaces);
  52         buf.append(register.toString());
  53         buf.append(comma);
  54         buf.append(address.toString());
  55         return buf.toString();
  56     }
  57 
  58     protected String getDescription() {
  59         StringBuffer buf = new StringBuffer();
  60         if (register == SPARCRegisters.G0) {
  61             switch (opcode) {
  62                 case ST:
  63                     buf.append("clr");
  64                     break;
  65                 case STH:
  66                     buf.append("clrh");
  67                     break;
  68                 case STB:
  69                     buf.append("clrb");
  70                     break;
  71                 default:
  72                     return defaultInitDescription(buf);
  73             }
  74             buf.append(spaces);
  75             buf.append(address.toString());
  76             return buf.toString();
  77         } else {
  78             return defaultInitDescription(buf);
  79         }
  80     }
  81 
  82     public int getDataType() {
  83         return dataType;
  84     }
  85 
  86     public Address getStoreDestination() {
  87         return address;
  88     }
  89 
  90     public Register[] getStoreSources() {
  91         return storeSources;
  92     }
  93 
  94     public boolean isStore() {
  95         return true;
  96     }
  97 }