A$2$: Decimal to Base

You are to write simple MSP$430$ assembly functions for a program that will take a decimal number and a base as input and output the value in that specified base. For example:

$>2367098$

$116245$

$>132$

$1101$

$>297082$

$111010000001100$

$>581523$

$2221202210$

$>484354$

$23310303$

$>345676$

$424011$

$>510066$

$1032050$

$>515669$

$77655$

$>3760820$

$4$E$08$

$>5915630$

$25$LQ

$>244037$

$1$SZ

$>244137$

$1$Sa

$>244237$

$1$T$0$

$>2837464$

$6$xM

$>40080256$

$156\mathrm{.}144$

$>45600256$

$178\mathrm{.}32$

$>2903865$

$0$

$>1231$

$0$

$>678902$

$100100110010$

This is just example output, you should test against as many possible inputs as you can.

Your program should be able to handle all bases from $2$ to $64$ and $256.$

It must have $6$ completed assembly functions:

unsigned convert$($unsigned decimal, unsigned base$)$

unsigned other$\_$base$($unsigned decimal, unsigned base$)$

unsigned power$2\_$base$($unsigned decimal, unsigned base$)$

unsigned base$\_256($unsigned decimal, unsigned base$)$

unsigned log$\_2($unsigned value$)$

unsigned rshift$($unsigned value, unsigned amount$)$

$.$file "func$/$convert$.$S$"$

$.$text

$.$global convert

; this function has to figure

; out which conversion function

; to call

;

; it receives the decimal value

; in r$15$ and the base to convert

; to in r$14$

convert:

push r$14$

push r$15$

mov r$15,0$

convert$\_$loop:

mov r$14,$ r$12$

call div

add r$14,48$

mov #buf, r$14$

add r$13,$ r$14$

mov.b #$\text{'}0\text{'},0($r$14)$

;strb r$14,$ r$13$

inc r$13$

cmp r$12,0$

jeq convert$\_$done

jmp convert$\_$loop

convert$\_$done:

mov #buf, r$14$

add r$13,$ r$14$

mov.b #$\text{'}0\text{'},0($r$14)$

;strb $0,$ r$13$

pop r$15$

pop r$14$

ret

;mov #$40,$ r$13$

;call #other$\_$base

;mov #$40,$ r$15$

$.$file "func$/$base$\_256.$S$"$

$.$text

$.$global base$\_256$

; this function uses both approaches

; $($possibly calling other$\_$base$)$

;

; the value to convert is in r$15,$

; the base is specified in r$14$ and

; the current index is given in r$13$

base$\_256$:

PUSH R$14$

PUSH R$15$

;Use power$2\_$base funcstion to convert too base $256$

;implementing the algorithm to convert the decimal to base $256$

mov R$14,256$

mov R$15,0$

CALL power$2\_$base

POP R$15$

POP R$14$

ret

$.$file "func$/$log$\_2.$S$"$

$.$text

$.$global log$\_2$

; this function calculates

; log base $2$ of a value

;

; the value should be in r$15$

log$\_2$:

push r$14$

push r$15$

mov r$14,$ r$12$

mov r$15,0$

log$2\_$loop:

cmp r$14,2$

jge log$2\_$done

rrc r$14,1$

inc r$15$

jmp log$2\_$loop

log$2\_$done:

mov r$12,$ r$15$

pop r$15$

pop

$.$file "func$/$other$\_$base.S$"$

$.$text

$.$global other$\_$base

; this function uses modulo and

; divide to convert the decimal

; value to the specified base

;

; the value to convert is in r$15,$

; the base is specified in r$14$ and

; the current index is given in r$13$

other$\_$base:

push r$14$

push r$15$

mov r$15,0$

other$\_$base$\_$loop:

mov r$14,$ r$12$

call div

add r$14,48$

mov #buf, r$14$ ; buf

add r$13,$ r$14$ ; buf$[$index$]$

mov.b #$\text{'}0\text{'},0($r$14)$ ; buf$[$index$]=\text{'}0\text{'}$

;strb r$14,$ r$13$

inc r$13$

cmp r$12,0$

jeq other$\_$base$\_$done

jmp other$\_$base$\_$loop

other$\_$base$\_$done:

mov #buf, r$14$ ; buf

add r$13,$ r$14$ ; buf$[$index$]$

mov.b #$\text{'}0\text{'},0($r$14)$ ; buf$[$index$]=\text{'}0\text{'}$

;strb $0,$ r$13$

pop r$15$

pop r$14$

ret

;mov #buf, r$14$ ; buf

;add r$13,$ r$14$ ; buf$[$index$]$

;mov.b #$\text{'}0\text{'},0($r$14)$ ; buf$[$index$]=\text{'}0\text{'}$

;ret

$.$file "func$/$power$2\_$base.S$"$

$.$text

$.$global power$2\_$base

; this function uses mask and

; shift to convert the decimal

; value to the specified base

;

; the value to convert is in r$15,$

; the base is specified in r$14$ and

; the current index is given in r$13$

power$2\_$base:

push r$14$

push r$15$

mov r$14,$ r$12$

and r$14,$ r$12$

cmp r$14,0$

jne convert

mov r$14,$ r$12$

mov r$12,$ r$13$

mov r$13,$ r$15$

call other$\_$base

pop r$15$

pop r$14$

ret

$.$file "func$/$rshift$.$S$"$

$.$text

$.$global rshift

; this function should shift the

; a value a specified number of times

;

; the value to shift is in r$15$ and

; the number of times to right shift

; is specified in r$14$

rshift:

push r$14$

push r$15$

mov r$14,$ r$13$

mov r$15,$ r$12$

rshift$\_$loop:

cmp r$15,0$

jeq rshift$\_$done

rrc r$14,$ #$1$

dec r$15$

jmp rshift$\_$loop

rshift$\_$done:

mov r$12,$ r$14$

pop r$15$

pop r$14$

ret

this is what i have so far would really love some help with this thank you