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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 SPARCArithmeticInstruction extends SPARCFormat3AInstruction
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30 implements ArithmeticInstruction {
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31 final private int operation;
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32
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33 public SPARCArithmeticInstruction(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 if (rd == rs1 && operand2.isImmediate()) {
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41 int value = ((Immediate)operand2).getNumber().intValue();
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42 StringBuffer buf = new StringBuffer();
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43 switch (opcode) {
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44 case ADD:
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45 buf.append("inc");
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46 break;
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47 case ADDcc:
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48 buf.append("inccc");
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49 break;
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50 case SUB:
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51 buf.append("dec");
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52 break;
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53 case SUBcc:
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54 buf.append("deccc");
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55 break;
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56 default:
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57 return super.getDescription();
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58 }
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59 buf.append(spaces);
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60 if (value != 1) {
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61 buf.append(getOperand2String()); buf.append(comma);
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62 }
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63 buf.append(rd.toString());
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64 return buf.toString();
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65 } else if (rd == SPARCRegisters.G0 && opcode == SUBcc) {
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66 StringBuffer buf = new StringBuffer();
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67 buf.append("cmp");
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68 buf.append(spaces);
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69 buf.append(rs1.toString());
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70 buf.append(comma);
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71 buf.append(getOperand2String());
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72 return buf.toString();
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73 } else if (rs1 == SPARCRegisters.G0 && opcode == SUB && operand2.isRegister()) {
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74 StringBuffer buf = new StringBuffer();
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75 buf.append("neg");
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76 buf.append(spaces);
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77 buf.append(operand2.toString());
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78 if (operand2 != rd) {
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79 buf.append(comma);
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80 buf.append(rd.toString());
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81 }
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82 return buf.toString();
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83 }
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84
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85 return super.getDescription();
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86 }
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87
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88 public Operand getArithmeticDestination() {
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89 return getDestinationRegister();
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90 }
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91
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92 public Operand[] getArithmeticSources() {
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93 return (new Operand[] { rs1, operand2 });
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94 }
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95
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96 public int getOperation() {
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97 return operation;
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98 }
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99
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100 public boolean isArithmetic() {
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101 return true;
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102 }
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103 }
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