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 }