jef.dna.instructions.impl
Class IF_ICmpne

java.lang.Object
  jef.dna.instructions.impl.InstructionAncestor
      jef.dna.instructions.impl.IF_ICmpne

All Implemented Interfaces:

java.lang.Cloneable, Instruction, BytesCountable

public class IF_ICmpne
extends InstructionAncestor

This class maps the IF_ICMPNE bytecode instruction which compares the first two ints popped from the operand stack. If the comparison succeeds the execution proceeds at the 16-bit offset given by (branchbyte1<<8) | branchbyte2, where branchbyte1 and branchbyte2 are the two operands of the bytecode instruction.
The comparison succeeds iff value1 != value2

Author:

Francesco Russo (frusso@cs.unibo.it)

Field Summary

Fields inherited from class jef.dna.instructions.impl.InstructionAncestor

logger, opCode, operands, operandsCount

Constructor Summary

IF_ICmpne()
Creates a new instance of IF_ICmpne

Method Summary

int	updateRefs(int offset) This method must implement the logic necessary to update all the references to constant pool table's entries contained within the bytecode instruction.

Methods inherited from class jef.dna.instructions.impl.InstructionAncestor

clone, fromArray, getBytesCount, getOpCode, getOperands, getOperandsCount, setOpCode, setOperands, setOperandsCountPosticipated, toArray

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IF_ICmpne

public IF_ICmpne()

Creates a new instance of IF_ICmpne

Method Detail

updateRefs

public int updateRefs(int offset)

This method must implement the logic necessary to update all the references to constant pool table's entries contained within the bytecode instruction.

Specified by:

updateRefs in interface Instruction

Overrides:

updateRefs in class InstructionAncestor

Parameters:

offset - The offset used for updating expressed as number of cpt's entries to be skipped

Returns:

int The number of processed words within the current bytecode instruction