edu.arizona.cs.mbel.instructions
Class LDLOC

java.lang.Object
  edu.arizona.cs.mbel.instructions.Instruction
      edu.arizona.cs.mbel.instructions.LDLOC

All Implemented Interfaces:

ShortFormInstruction

public class LDLOC

extends Instruction

implements ShortFormInstruction

Load local variable.
Stack transition:
... --> ..., value

Field Summary

static int	LDLOC
static int	LDLOC_0
static int	LDLOC_1
static int	LDLOC_2
static int	LDLOC_3
static int	LDLOC_S
protected static int[]	OPCODE_LIST

Constructor Summary

LDLOC(boolean shortF, int index)
Makes a LDLOC object with the given local var index, possibly short form (only to be used for ldloc and ldloc.s)

LDLOC(int op)
Makes a LDLOC object corresponding to the given opcode (only for ldloc.0 -- ldloc.3)

LDLOC(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	getIndexValue()
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.Instruction

getOpcode, readInstruction, toString

Methods inherited from class java.lang.Object

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

Field Detail

LDLOC

public static final int LDLOC

See Also:

Constant Field Values

LDLOC_S

public static final int LDLOC_S

See Also:

Constant Field Values

LDLOC_0

public static final int LDLOC_0

See Also:

Constant Field Values

LDLOC_1

public static final int LDLOC_1

See Also:

Constant Field Values

LDLOC_2

public static final int LDLOC_2

See Also:

Constant Field Values

LDLOC_3

public static final int LDLOC_3

See Also:

Constant Field Values

OPCODE_LIST

protected static final int[] OPCODE_LIST

Constructor Detail

LDLOC

public LDLOC(boolean shortF,
             int index)
      throws InstructionInitException

Makes a LDLOC object with the given local var index, possibly short form (only to be used for ldloc and ldloc.s)

Parameters:

shortF - true iff this is a short form instruction (i.e. 0<=index<256)

index - the local var index

LDLOC

public LDLOC(int op)
      throws InstructionInitException

Makes a LDLOC object corresponding to the given opcode (only for ldloc.0 -- ldloc.3)

Parameters:

op - the opcode for this instruction. Must be one of {LDLOC_0,LDLOC_1,LDLOC_2,LDLOC_3}

LDLOC

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

Method Detail

isShort

public boolean isShort()

Specified by:

isShort in interface ShortFormInstruction

getIndexValue

public int getIndexValue()

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 Instruction