1 /*

     2  * reserved comment block

     3  * DO NOT REMOVE OR ALTER!

     4  */

     5 package com.sun.org.apache.bcel.internal.generic;

     6 

     7 /* ====================================================================

     8  * The Apache Software License, Version 1.1

     9  *

    10  * Copyright (c) 2001 The Apache Software Foundation.  All rights

    11  * reserved.

    12  *

    13  * Redistribution and use in source and binary forms, with or without

    14  * modification, are permitted provided that the following conditions

    15  * are met:

    16  *

    17  * 1. Redistributions of source code must retain the above copyright

    18  *    notice, this list of conditions and the following disclaimer.

    19  *

    20  * 2. Redistributions in binary form must reproduce the above copyright

    21  *    notice, this list of conditions and the following disclaimer in

    22  *    the documentation and/or other materials provided with the

    23  *    distribution.

    24  *

    25  * 3. The end-user documentation included with the redistribution,

    26  *    if any, must include the following acknowledgment:

    27  *       "This product includes software developed by the

    28  *        Apache Software Foundation (http://www.apache.org/)."

    29  *    Alternately, this acknowledgment may appear in the software itself,

    30  *    if and wherever such third-party acknowledgments normally appear.

    31  *

    32  * 4. The names "Apache" and "Apache Software Foundation" and

    33  *    "Apache BCEL" must not be used to endorse or promote products

    34  *    derived from this software without prior written permission. For

    35  *    written permission, please contact apache@apache.org.

    36  *

    37  * 5. Products derived from this software may not be called "Apache",

    38  *    "Apache BCEL", nor may "Apache" appear in their name, without

    39  *    prior written permission of the Apache Software Foundation.

    40  *

    41  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED

    42  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

    43  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    44  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR

    45  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    46  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

    47  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

    48  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

    49  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

    50  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

    51  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

    52  * SUCH DAMAGE.

    53  * ====================================================================

    54  *

    55  * This software consists of voluntary contributions made by many

    56  * individuals on behalf of the Apache Software Foundation.  For more

    57  * information on the Apache Software Foundation, please see

    58  * <http://www.apache.org/>.

    59  */

    60 import com.sun.org.apache.bcel.internal.Constants;

    61 /**

    62  * Super class for the family of arithmetic instructions.

    63  *

    64  * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>

    65  */

    66 public abstract class ArithmeticInstruction extends Instruction

    67   implements TypedInstruction, StackProducer, StackConsumer {

    68   /**

    69    * Empty constructor needed for the Class.newInstance() statement in

    70    * Instruction.readInstruction(). Not to be used otherwise.

    71    */

    72   ArithmeticInstruction() {}

    73 

    74   /**

    75    * @param opcode of instruction

    76    */

    77   protected ArithmeticInstruction(short opcode) {

    78     super(opcode, (short)1);

    79   }

    80 

    81   /** @return type associated with the instruction

    82    */

    83   public Type getType(ConstantPoolGen cp) {

    84     switch(opcode) {

    85     case Constants.DADD: case Constants.DDIV: case Constants.DMUL:

    86     case Constants.DNEG: case Constants.DREM: case Constants.DSUB:

    87       return Type.DOUBLE;

    88 

    89     case Constants.FADD: case Constants.FDIV: case Constants.FMUL:

    90     case Constants.FNEG: case Constants.FREM: case Constants.FSUB:

    91       return Type.FLOAT;

    92 

    93     case Constants.IADD: case Constants.IAND: case Constants.IDIV:

    94     case Constants.IMUL: case Constants.INEG: case Constants.IOR: case Constants.IREM:

    95     case Constants.ISHL: case Constants.ISHR: case Constants.ISUB:

    96     case Constants.IUSHR: case Constants.IXOR:

    97       return Type.INT;

    98 

    99     case Constants.LADD: case Constants.LAND: case Constants.LDIV:

   100     case Constants.LMUL: case Constants.LNEG: case Constants.LOR: case Constants.LREM:

   101     case Constants.LSHL: case Constants.LSHR: case Constants.LSUB:

   102     case Constants.LUSHR: case Constants.LXOR:

   103       return Type.LONG;

   104 

   105     default: // Never reached

   106       throw new ClassGenException("Unknown type " + opcode);

   107     }

   108   }

   109 }