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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 SPARCLogicInstruction extends SPARCFormat3AInstruction
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30 implements LogicInstruction {
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31 final private int operation;
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32
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33 public SPARCLogicInstruction(String name, int opcode, int operation, SPARCRegister rs1,
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34 ImmediateOrRegister operand2, SPARCRegister rd) {
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35 super(name, opcode, rs1, operand2, rd);
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36 this.operation = operation;
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37 }
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38
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39 protected String getDescription() {
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40 SPARCRegister G0 = SPARCRegisters.G0;
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41 if (opcode == ORcc && rd == G0 && rd == operand2) {
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42 StringBuffer buf = new StringBuffer();
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43 buf.append("tst");
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44 buf.append(spaces);
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45 buf.append(getOperand2String());
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46 return buf.toString();
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47 } else if (opcode == XNOR && G0 == operand2) {
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48 StringBuffer buf = new StringBuffer();
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49 buf.append("not");
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50 buf.append(spaces);
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51 buf.append(rs1.toString());
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52 if (rs1 != rd) {
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53 buf.append(comma);
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54 buf.append(rd.toString());
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55 }
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56 return buf.toString();
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57 } else if (opcode == ANDcc && rd == G0) {
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58 StringBuffer buf = new StringBuffer();
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59 buf.append("btst");
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60 buf.append(spaces);
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61 buf.append(getOperand2String());
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62 buf.append(comma);
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63 buf.append(rd.toString());
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64 return buf.toString();
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65 } else if (rs1 == rd) {
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66 StringBuffer buf = new StringBuffer();
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67 switch (opcode) {
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68 case OR:
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69 buf.append("bset");
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70 break;
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71 case ANDN:
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72 buf.append("bclr");
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73 break;
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74 case XOR:
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75 buf.append("btog");
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76 break;
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77 default:
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78 return super.getDescription();
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79 }
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80 buf.append(spaces);
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81 buf.append(getOperand2String());
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82 buf.append(comma);
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83 buf.append(rd.toString());
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84 return buf.toString();
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85 } else {
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86 return super.getDescription();
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87 }
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88 }
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89
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90 public Operand getLogicDestination() {
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91 return getDestinationRegister();
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92 }
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93
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94 public Operand[] getLogicSources() {
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95 return (new Operand[] { rs1, operand2 });
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96 }
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97
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98 public int getOperation() {
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99 return operation;
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100 }
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101
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102 public boolean isLogic() {
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103 return true;
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104 }
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105 }
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