$1.$

Implement the BFC $($b

it

f

ield

c

lear

$)$ instruction by using other assembly instructions.

$2.$

Suppose

r$0$

$=$

$0$xFFFFFFFF

$,$

r$1$

$=$

$0$x$00000001$

$,$

r$2$

$=$

$0$x$00000000$

$.$ Initially, N$,$ Z$,$ C$,$ and

V

flags are zero. Find the

values of the N$,$ Z$,$ C$,$ and V flags in

the following instructions. $($Assume

each instruction runs individually,

i$.$e$.$

these instructions are not part of a

si

ngle

program

$,$ treat

each instr

uctio

n independently

$.)$

$(1)$

ADD

r$3,$ r$0,$ r$2$

$(2)$

SUBS r$3,$ r$0,$ r$0$

$(3)$

ADDS r$3,$ r$0,$ r$2$

$(4)$

LSL

r$3,$ r$0,$ #$1$

$(5)$

LSRS r$3,$ r$1,$ #$1$

$(6)$

ANDS

r$3,$

r$0,$

r$2$

$3.$

Translate the following C statement

$($finding remainder, or mod$)$

into an assembly

program, assuming $16$

$-$

bit unsigned integers

x

and

y

$($i$.$e$.$ unsigned short$)$ are stored in register

r$0,$ and r$1,$ respectively.

$$

$=$

$$

$\%$

$$

;