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1 /*
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2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.asm.sparc;
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26
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27 import sun.jvm.hotspot.asm.*;
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28
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29 public class SPARCStoreInstruction extends SPARCMemoryInstruction
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30 implements StoreInstruction {
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31 final protected SPARCRegister register2; // used by double word store instructions
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32 final protected Register[] storeSources;
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33
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34 public SPARCStoreInstruction(String name, int opcode, SPARCRegisterIndirectAddress address, SPARCRegister register, int dataType) {
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35 super(name, opcode, address, register, dataType);
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36 if (opcode == STD || opcode == STDA) {
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37 storeSources = new Register[2];
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38 storeSources[0] = register;
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39 int nextRegNum = (register.getNumber() + 1) % SPARCRegisters.NUM_REGISTERS;
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40 register2 = SPARCRegisters.getRegister(nextRegNum);
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41 storeSources[1] = register2;
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42 } else {
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43 storeSources = new Register[1];
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44 storeSources[0] = register;
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45 register2 = null;
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46 }
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47 }
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48
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49 private String defaultInitDescription(StringBuffer buf) {
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50 buf.append(getName());
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51 buf.append(spaces);
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52 buf.append(register.toString());
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53 buf.append(comma);
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54 buf.append(address.toString());
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55 return buf.toString();
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56 }
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57
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58 protected String getDescription() {
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59 StringBuffer buf = new StringBuffer();
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60 if (register == SPARCRegisters.G0) {
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61 switch (opcode) {
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62 case ST:
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63 buf.append("clr");
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64 break;
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65 case STH:
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66 buf.append("clrh");
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67 break;
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68 case STB:
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69 buf.append("clrb");
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70 break;
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71 default:
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72 return defaultInitDescription(buf);
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73 }
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74 buf.append(spaces);
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75 buf.append(address.toString());
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76 return buf.toString();
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77 } else {
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78 return defaultInitDescription(buf);
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79 }
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80 }
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81
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82 public int getDataType() {
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83 return dataType;
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84 }
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85
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86 public Address getStoreDestination() {
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87 return address;
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88 }
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89
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90 public Register[] getStoreSources() {
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91 return storeSources;
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92 }
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93
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94 public boolean isStore() {
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95 return true;
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96 }
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97 }
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