org.ow2.asmdex.instruction
Class InstructionFormat22X

java.lang.Object
  extended by org.ow2.asmdex.instruction.Instruction
      extended by org.ow2.asmdex.instruction.InstructionFormat22X
All Implemented Interfaces:
ITwoRegistersInstruction

public class InstructionFormat22X
extends Instruction
implements ITwoRegistersInstruction

Encodes and decodes an instruction built with the Dalvik format 22X.

Author:
Julien Névo

Field Summary
 
Fields inherited from class org.ow2.asmdex.instruction.Instruction
lineNumber, opcodeByte, opcodeHighOrderByte
 
Constructor Summary
InstructionFormat22X(int opcode, int destinationRegister, int var)
          Constructor of the Instruction by providing all the elements it's composed of.
 
Method Summary
 int getRegisterA()
          Gets the index of first register
static int getRegisterA(int opcode)
          Returns the RegisterA encoded in the given 16-bit opcode.
 int getRegisterB()
          Gets the index of second register
static int getRegisterB(IDalvikValueReader reader)
          Returns the RegisterB encoded where the Reader points.
 int getSize()
          Returns the size of the instruction in bytes.
static void skip(IDalvikValueReader reader)
          Skips the data of this Instruction.
 void write(ByteVector out, ConstantPool constantPool)
          Encodes the instruction, in the Dalvik format, to an output buffer.
 
Methods inherited from class org.ow2.asmdex.instruction.Instruction
getInstructionSizeInByte, getLineNumber, getOpcodeByte, getOpcodeHighOrderByte, setLineNumber, test4BitsLimit, test4BitsLimit
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

InstructionFormat22X

public InstructionFormat22X(int opcode,
                            int destinationRegister,
                            int var)
Constructor of the Instruction by providing all the elements it's composed of.

Parameters:
opcode - 8 or 16 bits opcode.
destinationRegister - the destination register.
var - the register.
Method Detail

getRegisterA

public int getRegisterA()
Description copied from interface: ITwoRegistersInstruction
Gets the index of first register

Specified by:
getRegisterA in interface ITwoRegistersInstruction
Returns:
index

getRegisterB

public int getRegisterB()
Description copied from interface: ITwoRegistersInstruction
Gets the index of second register

Specified by:
getRegisterB in interface ITwoRegistersInstruction
Returns:
index

getRegisterA

public static int getRegisterA(int opcode)
Returns the RegisterA encoded in the given 16-bit opcode.

Returns:
the RegisterA.

getRegisterB

public static int getRegisterB(IDalvikValueReader reader)
Returns the RegisterB encoded where the Reader points. It must be performed only once after having read the opcode.

Parameters:
reader - reader pointing after the 16-bit opcode.
Returns:
the RegisterB.

skip

public static void skip(IDalvikValueReader reader)
Skips the data of this Instruction.

Parameters:
reader - reader on the Instruction to parse, pointing after the 16-bit opcode.

getSize

public int getSize()
Description copied from class: Instruction
Returns the size of the instruction in bytes.

Specified by:
getSize in class Instruction
Returns:
the size of the instruction in bytes.

write

public void write(ByteVector out,
                  ConstantPool constantPool)
Description copied from class: Instruction
Encodes the instruction, in the Dalvik format, to an output buffer.

Specified by:
write in class Instruction
Parameters:
out - output buffer.
constantPool - the constantPool.