org.apache.flex.abc.semantics

Class OneOperandInstruction

java.lang.Object

org.apache.flex.abc.semantics.Instruction

org.apache.flex.abc.semantics.OneOperandInstruction

public class OneOperandInstruction
extends Instruction

A OneOperandInstruction is an instruction that is known to have only one operand.

Field Summary

Fields

Modifier and Type	Field and Description
Object	operand The instruction's operand.

Fields inherited from class org.apache.flex.abc.semantics.Instruction

opcode

Constructor Summary

Constructors

Constructor and Description
OneOperandInstruction(int opcode) Construct a OneOperandInstruction whose operand is to be filled in later.
OneOperandInstruction(int opcode, Object operand) Construct a OneOperandInstruction.

Method Summary

Methods

Modifier and Type	Method and Description
Object	getOperand(int index) Get one of the instruction's non-immediate operands.
int	getOperandCount()
Label	getTarget() Get the target of a branch instruction.
boolean	hasOperands()
void	setTarget(Label target) Set the target of a branch instruction.
String	toString()

Methods inherited from class org.apache.flex.abc.semantics.Instruction

decodeOp, decodeOpcodeName, getImmediate, getOpcode, isBranch, isExecutable, isImmediate, isReturn, isTargetableInstruction, isTransferOfControl, setImmediate, setOperands, setTempRegisters, unsupported

Methods inherited from class java.lang.Object

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

Field Detail

operand

public Object operand

The instruction's operand.

Constructor Detail

OneOperandInstruction

public OneOperandInstruction(int opcode,
                     Object operand)

Construct a OneOperandInstruction.

Parameters:

opcode - - the instruction's opcode.

operand - - the instruction's operand.

OneOperandInstruction

public OneOperandInstruction(int opcode)

Construct a OneOperandInstruction whose operand is to be filled in later.

Parameters:

opcode - - the instruction's opcode. Must be one of the approved opcodes.

Method Detail

toString

public String toString()

Overrides:

toString in class Instruction

Returns:

a string representation of the opcode.

getOperandCount

public int getOperandCount()

Overrides:

getOperandCount in class Instruction

Returns:

the number of operands this instruction has.

hasOperands

public boolean hasOperands()

Overrides:

hasOperands in class Instruction

Returns:

true if this instruction has operands (it may have zero operands, but it supports them).

getOperand

public Object getOperand(int index)

Description copied from class: Instruction

Get one of the instruction's non-immediate operands.

Overrides:

getOperand in class Instruction

Parameters:

index - - the index of the desired operand.

Returns:

the operand at the given index.

getTarget

public Label getTarget()

Get the target of a branch instruction.

Overrides:

getTarget in class Instruction

Returns:

the target label, or null if not present.

setTarget

public void setTarget(Label target)

Set the target of a branch instruction.

Overrides:

setTarget in class Instruction

Parameters:

target - - the AET Label this instruction targets.