Question 3
Convert the following main() to assembly code:
main(int argc, char **argv)
{
int i;
i = 1;
b(6, atoi(argv[1]));
return i;
}
Question 4
Behold the following piece of assembly code:
a:
push #8
st %g0 -> [fp]
ld [fp+12] -> %r0
st %r0 -> [fp-4]
b l1
l0:
ld [fp-4] -> %r0
add %r0, %g1 -> %r0
st %r0 -> [fp-4]
l1:
ld [fp-4] -> %r0
ld [fp+16] -> %r1
cmp %r0, %r1
bge l2
ld [fp] -> %r0
ld [fp-4] -> %r1
add %r0, %r1 -> %r0
st %r0 -> [fp]
b l0
l2:
ld [fp] -> %r0
ld [fp+20] -> %r1
st %r0 -> [r1]
ret
On the answer sheet provided, circle the proper answer to
each of the following questions about the assembler
and the C code from which it was derived.
| Part a. | Does this procedure perform register spilling? |
| Part b. | How many local variables does this procedure have? |
| Part c. | How many parameters does this procedure have? |
| Part d. | Does the C procedure have a return value? |
| Part e. | Are any local variables pointers? |
| Part f. | Are any parameters pointers? |
| Part g. | Is there an if statement in the C code? |
| Part h. | Is there a while loop in the C code? |
| Part i. | Is there a for loop in the C code? |
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