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 SPARCLogicInstruction extends SPARCFormat3AInstruction

    30     implements LogicInstruction {

    31     final private int operation;

    32 

    33     public SPARCLogicInstruction(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         SPARCRegister G0 = SPARCRegisters.G0;

    41         if (opcode == ORcc && rd == G0 && rd == operand2) {

    42             StringBuffer buf = new StringBuffer();

    43             buf.append("tst");

    44             buf.append(spaces);

    45             buf.append(getOperand2String());

    46             return buf.toString();

    47         } else if (opcode == XNOR && G0 == operand2) {

    48             StringBuffer buf = new StringBuffer();

    49             buf.append("not");

    50             buf.append(spaces);

    51             buf.append(rs1.toString());

    52             if (rs1 != rd) {

    53                 buf.append(comma);

    54                 buf.append(rd.toString());

    55             }

    56             return buf.toString();

    57         } else if (opcode == ANDcc && rd == G0) {

    58             StringBuffer buf = new StringBuffer();

    59             buf.append("btst");

    60             buf.append(spaces);

    61             buf.append(getOperand2String());

    62             buf.append(comma);

    63             buf.append(rd.toString());

    64             return buf.toString();

    65         } else if (rs1 == rd) {

    66             StringBuffer buf = new StringBuffer();

    67             switch (opcode) {

    68                 case OR:

    69                     buf.append("bset");

    70                     break;

    71                 case ANDN:

    72                     buf.append("bclr");

    73                     break;

    74                 case XOR:

    75                     buf.append("btog");

    76                     break;

    77                 default:

    78                     return super.getDescription();

    79             }

    80             buf.append(spaces);

    81             buf.append(getOperand2String());

    82             buf.append(comma);

    83             buf.append(rd.toString());

    84             return buf.toString();

    85         } else {

    86             return super.getDescription();

    87         }

    88     }

    89 

    90     public Operand getLogicDestination() {

    91         return getDestinationRegister();

    92     }

    93 

    94     public Operand[] getLogicSources() {

    95         return (new Operand[] { rs1, operand2 });

    96     }

    97 

    98     public int getOperation() {

    99         return operation;

   100     }

   101 

   102     public boolean isLogic() {

   103         return true;

   104     }

   105 }