Farhan,

If you read this, I still hope you will explain why you think that

     MOV  AR0,#LOW(func) 
     MOV  AR1,#HIGH(func) 
     PUSH AR0 
     PUSH AR1 
     RET 

does anything significantly different from

     LJMP func

becaue I think you would benefit from someone explaining why it doesn't. Do yourself a favor and explain your point of view, you only risk to learn something.