public void executeLB(ITypeInstruction instruction) {
		
		RegisterFile regfile = RegisterFile.getInstance();
		Memory memory=Memory.getInstance();
		int value=memory.getMemoryValue(regfile.getRegisterValue(instruction.getRegSource()
				+instruction.getImmediateVal()));
		regfile.setRegisterValue(instruction.getRegTarget(), value);
		AppContext.PROGRAM_COUNTER++;
		/* -- Load byte

	Description:
	A byte is loaded into a register from the specified address.
	Operation:
	$t = MEM[$s + offset]; advance_pc (4);
	
	Syntax:
	lb $t, offset($s)
	Encoding:
	1000 00ss ssst tttt iiii iiii iiii iiii
		 */ 
	}