2. USE Arc tools 2.12

Arc ,Arc Assembly Arc simulator

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 %r1 after this program is executed?

! Program 4	.begin
	.org	2048
main:	ld	[a], %r1
	ld	[b], %r2
	ld	[c], %r3
top:	subcc	%r4, 3, %r0
	be	done
	subcc	%r5, %r6, %r0
	bneg	else
	orcc	%r1, %r2, %r1
	addcc	%r6, 1, %r6
	ba	bottom
else:	andcc	%r1, %r3, %r1
	addcc	%r5, 1, %r5
bottom:	addcc	%r4, 1, %r4
	ba	top
done:	st	%r3, [y]
	jmpl	%r15+4, %r0
	.org	3000
a:	0xa0
b:	0x33
c:	0x52
y:	2
	.end