Jump to Subroutine & Jump Return instruction on DLX Program

Jump to Subroutine & Jump Return instruction on DLX Program

Example code

Jal subroutine name

Sub routine

Jr r31 to return to main program

Example Jump to Subroutine & Jump Return instruction on DLX Program 

  .start main ;Start program and jump to label main  
 main:       
 jal calculator;jump and link to calculator  
 halt ; halt program after executing calculator sub routine  

 calculator: ;calculator sub routine  
 add r1,r2,r3  
 jr r31 ;back to main method and execute halt statement