CompareNum:
   mov   a,Num1
   cjne  a,Num2,CompareNum_1
   blah  blah1                    ;if Num1=Num2
   blah  blah2                         ;do blahblah
   sjmp  CompareNum_9         
CompareNum_1:
   jc    CompareNum_2
   blah  blah3                    ;if Num1<Num2
   blah  blah4                         ;do something else
   sjmp  CompareNum_9
CompareNum_2:
   blah  blah5                    ;if Num1>Num2
   blah  blah6                        ;do something
   blah  blah7                        ;and fallthrough to end
CompareNum_9:
   ret