1 /*

     2  * Copyright (c) 2002, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * 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 }