1. package com.sun.org.apache.bcel.internal.generic;
  2. /* ====================================================================
  3. * The Apache Software License, Version 1.1
  4. *
  5. * Copyright (c) 2001 The Apache Software Foundation. All rights
  6. * reserved.
  7. *
  8. * Redistribution and use in source and binary forms, with or without
  9. * modification, are permitted provided that the following conditions
  10. * are met:
  11. *
  12. * 1. Redistributions of source code must retain the above copyright
  13. * notice, this list of conditions and the following disclaimer.
  14. *
  15. * 2. Redistributions in binary form must reproduce the above copyright
  16. * notice, this list of conditions and the following disclaimer in
  17. * the documentation and/or other materials provided with the
  18. * distribution.
  19. *
  20. * 3. The end-user documentation included with the redistribution,
  21. * if any, must include the following acknowledgment:
  22. * "This product includes software developed by the
  23. * Apache Software Foundation (http://www.apache.org/)."
  24. * Alternately, this acknowledgment may appear in the software itself,
  25. * if and wherever such third-party acknowledgments normally appear.
  26. *
  27. * 4. The names "Apache" and "Apache Software Foundation" and
  28. * "Apache BCEL" must not be used to endorse or promote products
  29. * derived from this software without prior written permission. For
  30. * written permission, please contact apache@apache.org.
  31. *
  32. * 5. Products derived from this software may not be called "Apache",
  33. * "Apache BCEL", nor may "Apache" appear in their name, without
  34. * prior written permission of the Apache Software Foundation.
  35. *
  36. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  37. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38. * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  39. * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  40. * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  42. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  43. * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  44. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  45. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  46. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  47. * SUCH DAMAGE.
  48. * ====================================================================
  49. *
  50. * This software consists of voluntary contributions made by many
  51. * individuals on behalf of the Apache Software Foundation. For more
  52. * information on the Apache Software Foundation, please see
  53. * <http://www.apache.org/>.
  54. */
  55. import com.sun.org.apache.bcel.internal.Constants;
  56. /**
  57. * Super class for the family of arithmetic instructions.
  58. *
  59. * @version $Id: ArithmeticInstruction.java,v 1.1.1.1 2001/10/29 20:00:06 jvanzyl Exp $
  60. * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  61. */
  62. public abstract class ArithmeticInstruction extends Instruction
  63. implements TypedInstruction, StackProducer, StackConsumer {
  64. /**
  65. * Empty constructor needed for the Class.newInstance() statement in
  66. * Instruction.readInstruction(). Not to be used otherwise.
  67. */
  68. ArithmeticInstruction() {}
  69. /**
  70. * @param opcode of instruction
  71. */
  72. protected ArithmeticInstruction(short opcode) {
  73. super(opcode, (short)1);
  74. }
  75. /** @return type associated with the instruction
  76. */
  77. public Type getType(ConstantPoolGen cp) {
  78. switch(opcode) {
  79. case Constants.DADD: case Constants.DDIV: case Constants.DMUL:
  80. case Constants.DNEG: case Constants.DREM: case Constants.DSUB:
  81. return Type.DOUBLE;
  82. case Constants.FADD: case Constants.FDIV: case Constants.FMUL:
  83. case Constants.FNEG: case Constants.FREM: case Constants.FSUB:
  84. return Type.FLOAT;
  85. case Constants.IADD: case Constants.IAND: case Constants.IDIV:
  86. case Constants.IMUL: case Constants.INEG: case Constants.IOR: case Constants.IREM:
  87. case Constants.ISHL: case Constants.ISHR: case Constants.ISUB:
  88. case Constants.IUSHR: case Constants.IXOR:
  89. return Type.INT;
  90. case Constants.LADD: case Constants.LAND: case Constants.LDIV:
  91. case Constants.LMUL: case Constants.LNEG: case Constants.LOR: case Constants.LREM:
  92. case Constants.LSHL: case Constants.LSHR: case Constants.LSUB:
  93. case Constants.LUSHR: case Constants.LXOR:
  94. return Type.LONG;
  95. default: // Never reached
  96. throw new ClassGenException("Unknown type " + opcode);
  97. }
  98. }
  99. }