;-------------------------------------------------------------------------------
; MSP430 Assembler Code Template for use with TI Code Composer Studio
;
;
;-------------------------------------------------------------------------------
            .cdecls C,LIST,"msp430.h"       ; Include device header file
            
;-------------------------------------------------------------------------------
            .def    RESET                   ; Export program entry-point to
                                            ; make it known to linker.
			.data
arr:		.int    "-25", "5", "22", "8", "-6", "14"
arrSize		.int    "6"
;-------------------------------------------------------------------------------
            .text                           ; Assemble into program memory.
            .retain                         ; Override ELF conditional linking
                                            ; and retain current section.
            .retainrefs                     ; And retain any sections that have
                                            ; references to current section.

;-------------------------------------------------------------------------------
RESET       mov.w   #__STACK_END,SP         ; Initialize stackpointer
StopWDT     mov.w   #WDTPW|WDTHOLD,&WDTCTL  ; Stop watchdog timer


;-------------------------------------------------------------------------------
; Main loop here
;-------------------------------------------------------------------------------
main:		push  #arr                      ; Move the starting address of arr onto the stack
            push  #arraySize    			; Push the arraySize onto the stack
            call   #SW_Mult
            mov.w @SP, #6






SW_Mult:    push R7						    ; save r7, the sum
			push R6						    ; save R6, array size
			push r4						    ; save r4, pointer to array
  		    mov.w 10(SP), R6			    ; retreive array size
  		    mov.w 12(SP, R7				    ; retreive starting address
			clr.w r8
			clr.w r9
 addIndex:	mov.w @r4+, r5					; increment byte counter
 			jmp   comp

comp:		cmp #0, r5
			clr.w  r8						; clear result
			jl	ext
sum2		cmp #16, r10
		 	jz  step2
		   ; sxt r5							; sign-extend value

ext:        sxt r5							; sign-extend value
			jmp sum2
step2:		add





;-------------------------------------------------------------------------------
; Stack Pointer definition
;-------------------------------------------------------------------------------
            .global __STACK_END
            .sect   .stack
            

;-------------------------------------------------------------------------------
; Interrupt Vectors
;-------------------------------------------------------------------------------
            .sect   ".reset"                ; MSP430 RESET Vector
            .short  RESET