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 SPARCArithmeticInstruction extends SPARCFormat3AInstruction 30 implements ArithmeticInstruction { 31 final private int operation; 32 33 public SPARCArithmeticInstruction(String name, int opcode, int operation, SPARCRegister rs1, 34 ImmediateOrRegister operand2, SPARCRegister rd) { 35 super(name, opcode, rs1, operand2, rd); 36 this.operation = operation; 37 } 38 39 protected String getDescription() { 40 if (rd == rs1 && operand2.isImmediate()) { 41 int value = ((Immediate)operand2).getNumber().intValue(); 42 StringBuffer buf = new StringBuffer(); 43 switch (opcode) { 44 case ADD: 45 buf.append("inc"); 46 break; 47 case ADDcc: 48 buf.append("inccc"); 49 break; 50 case SUB: 51 buf.append("dec"); 52 break; 53 case SUBcc: 54 buf.append("deccc"); 55 break; 56 default: 57 return super.getDescription(); 58 } 59 buf.append(spaces); 60 if (value != 1) { 61 buf.append(getOperand2String()); buf.append(comma); 62 } 63 buf.append(rd.toString()); 64 return buf.toString(); 65 } else if (rd == SPARCRegisters.G0 && opcode == SUBcc) { 66 StringBuffer buf = new StringBuffer(); 67 buf.append("cmp"); 68 buf.append(spaces); 69 buf.append(rs1.toString()); 70 buf.append(comma); 71 buf.append(getOperand2String()); 72 return buf.toString(); 73 } else if (rs1 == SPARCRegisters.G0 && opcode == SUB && operand2.isRegister()) { 74 StringBuffer buf = new StringBuffer(); 75 buf.append("neg"); 76 buf.append(spaces); 77 buf.append(operand2.toString()); 78 if (operand2 != rd) { 79 buf.append(comma); 80 buf.append(rd.toString()); 81 } 82 return buf.toString(); 83 } 84 85 return super.getDescription(); 86 } 87 88 public Operand getArithmeticDestination() { 89 return getDestinationRegister(); 90 } 91 92 public Operand[] getArithmeticSources() { 93 return (new Operand[] { rs1, operand2 }); 94 } 95 96 public int getOperation() { 97 return operation; 98 } 99 100 public boolean isArithmetic() { 101 return true; 102 } 103 }