edu.rice.cs.cunit.classFile.code.instructions
Class BranchInstruction

java.lang.Object
  edu.rice.cs.cunit.classFile.code.instructions.AInstruction
      edu.rice.cs.cunit.classFile.code.instructions.BranchInstruction

public class BranchInstruction
extends AInstruction

Branch Java instruction.

Author:

Mathias Ricken

Field Summary

protected byte	_opcode Opcode.
protected int	_target Branch target.

Constructor Summary

BranchInstruction(byte[] bytecode, int pc, int paddingPC, LineNumberTable lnt)
Make a new branch instruction from the bytecode stating at pc, padded using paddingPC, and use the line number table for branches.

BranchInstruction(byte opcode, int target)
Constructor.

Method Summary

boolean	equals(java.lang.Object o) Return true of this instruction and the other object are equal.
int[]	getBranchTargets() Return an array of target indices.
byte[]	getBytecode(int pc, LineNumberTable lnt) Get the bytecode for this instruction, padded for the specified program counter value, with branch targets according to the specified line number table * @param pc PC for padding
int	getBytecodeLength(int pc) Get the length bytecode for this instruction, padded for the specified program counter value.
byte	getOpcode() Get the opcode of this instruction.
int	hashCode() Return hash code.
void	setBranchTargets(int[] branchTargets) Set the branch target indices.
java.lang.String	toString() Return instruction in human-readable form.

Methods inherited from class edu.rice.cs.cunit.classFile.code.instructions.AInstruction

getCorrespondingLoad, getCorrespondingStore, makeInstruction, toStringVerbose

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

_opcode

protected byte _opcode

Opcode.

_target

protected int _target

Branch target.

Constructor Detail

BranchInstruction

public BranchInstruction(byte opcode,
                         int target)

Constructor.

Parameters:

opcode - branch opcode

target - target line number

BranchInstruction

public BranchInstruction(byte[] bytecode,
                         int pc,
                         int paddingPC,
                         LineNumberTable lnt)

Make a new branch instruction from the bytecode stating at pc, padded using paddingPC, and use the line number table for branches.

Parameters:

bytecode - bytecode

pc - starting index in bytecode

paddingPC - PC for padding

lnt - line number table for branches

Method Detail

getOpcode

public byte getOpcode()

Get the opcode of this instruction.

Specified by:

getOpcode in class AInstruction

Returns:

opcode

getBytecodeLength

public int getBytecodeLength(int pc)

Get the length bytecode for this instruction, padded for the specified program counter value.

Specified by:

getBytecodeLength in class AInstruction

Parameters:

pc - PC for padding

Returns:

bytecode length

getBytecode

public byte[] getBytecode(int pc,
                          LineNumberTable lnt)

Get the bytecode for this instruction, padded for the specified program counter value, with branch targets according to the specified line number table * @param pc PC for padding

Specified by:

getBytecode in class AInstruction

Parameters:

lnt - line number table for branches

pc - PC for padding

Returns:

bytecode

equals

public boolean equals(java.lang.Object o)

Return true of this instruction and the other object are equal.

Specified by:

equals in class AInstruction

Parameters:

o - other object

Returns:

true if equal

hashCode

public int hashCode()

Return hash code.

Specified by:

hashCode in class AInstruction

Returns:

hash code

getBranchTargets

public int[] getBranchTargets()

Return an array of target indices.

Specified by:

getBranchTargets in class AInstruction

Returns:

array of target indices.

setBranchTargets

public void setBranchTargets(int[] branchTargets)

Set the branch target indices.

Specified by:

setBranchTargets in class AInstruction

Parameters:

branchTargets - array of target indices

toString

public java.lang.String toString()

Return instruction in human-readable form.

Overrides:

toString in class java.lang.Object

Returns:

string representation