1.

Please add comments for each line.

a.

Explain what the program intends to do.

b.

Assemble the code by hand.

2.

Run the program through the simulator

3.

What is the content of %r4 after this program is executed?

! Program 1

! Hint: op3 for subcc is 010100

.begin

.org 2048

dstart.equ 4000

ld [a], %r1

ld [b], %r2

ld [c], %r3

addcc %r2, %r3, %r0

addcc %r1, %r0, %r4

subcc %r2, %r4, %r2

st %r0, [a]

st %r2, [y]

jmpl %r15 + 4, %r0

.org dstart

a:15

b:54

c:-29

y:0

.end