.export StartAsm    ; Tells the linker to export the StartAsm
		    	  ; label so other files can see it
        
.function "StartAsm", PPC_Start_Asm, PPC_End_Asm-PPC_Start_Asm
 
.text
 
PPC_Start_Asm:
 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Assembly code
;
 
StartAsm:
; your code goes here

; Give r2 the address of the data segment defined below

lis  r2, DataSeg@h  		;r2 = upper halfword of address
ori  r2, r2, DataSeg@l		;r2 = r2 | lower halfword of address
 
lwz r31,0(r2)		; load the value from memory at address r2+0 into r31
lwz r30,4(r2)		; load the value from memory at address r2+4 into r30

add r30, r30, r31 	; add r30+r31, and put the sum in r30

stw r30, 8(r2)		; store the sum into memory at address r2+8

blr       ; Return back to the C code    
 
PPC_End_Asm:

DataSeg:	;data values are words, so an offset from DataSeg is a multiple of 4
 .word $11	
 .word $22	
 .word 0