edu.arizona.cs.mbel.instructions
Class BEQ

java.lang.Object
  edu.arizona.cs.mbel.instructions.Instruction
      edu.arizona.cs.mbel.instructions.BranchInstruction
          edu.arizona.cs.mbel.instructions.BEQ

All Implemented Interfaces:

InstructionTargeter, ShortFormInstruction

public class BEQ

extends BranchInstruction

Branch on equals.
Stack transition:
..., value1, value2 --> ...

Field Summary

static int	BEQ
static int	BEQ_S
protected static int[]	OPCODE_LIST

Constructor Summary

BEQ(boolean shortF, InstructionHandle ih)
Makes a BEQ object with the given target handle, possibly in short form

BEQ(int opcode, ClassParser parse)

Method Summary

protected void	emit(ByteBuffer buffer, ClassEmitter emitter) Writes the instruction to the given buffer in raw byte form
boolean	equals(java.lang.Object o)
int	getLength() Returns the length in bytes of this instruction, as would be found on disk.
java.lang.String	getName() Returns the string representation of this instruction (may vary instance-to-instance)
boolean	isShort()

Methods inherited from class edu.arizona.cs.mbel.instructions.BranchInstruction

containsTarget, getTarget, getTargetHandle, setTarget, setTargetHandle, updateTarget

Methods inherited from class edu.arizona.cs.mbel.instructions.Instruction

getOpcode, readInstruction, toString

Methods inherited from class java.lang.Object

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

Field Detail

BEQ

public static final int BEQ

See Also:

Constant Field Values

BEQ_S

public static final int BEQ_S

See Also:

Constant Field Values

OPCODE_LIST

protected static final int[] OPCODE_LIST

Constructor Detail

BEQ

public BEQ(boolean shortF,
           InstructionHandle ih)
    throws InstructionInitException

Makes a BEQ object with the given target handle, possibly in short form

Parameters:

shortF - true iff this is a short form instruction

ih - the target handle

BEQ

public BEQ(int opcode,
           ClassParser parse)
    throws java.io.IOException,
           InstructionInitException

Method Detail

isShort

public boolean isShort()

getName

public java.lang.String getName()

Description copied from class: Instruction

Returns the string representation of this instruction (may vary instance-to-instance)

Specified by:

getName in class Instruction

Returns:

a string representing this instruction (i.e. "cpblk")

getLength

public int getLength()

Description copied from class: Instruction

Returns the length in bytes of this instruction, as would be found on disk. This value includes any prefixes prepended to this instruction.

Overrides:

getLength in class Instruction

emit

protected void emit(ByteBuffer buffer,
                    ClassEmitter emitter)

Description copied from class: Instruction

Writes the instruction to the given buffer in raw byte form

Overrides:

emit in class Instruction

Parameters:

buffer - the buffer to write to

emitter - a ClassEmitter for reconciling references to tokens

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class BranchInstruction