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CDA3101 Quiz 6
Last Name ____________________
Fall 2010
First Name ____________________
1.
Look at the following code.
lw $t0, 0($t1)
add $t3, $t0, $t2
add $t0, $t1, $t2
sub $t1, $t0, $t3
and $t2, $t0, $t1
a.
(6 points)
Indicate
in the chart below what stage each instruction is in at what
cycle,
where forwarding occurs
(
draw an arrow from where the value is
produced
to where the value is used
), and
where stalls occur
. In the chart
below, you may have more/less spaces than you need.
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Unformatted text preview: Make sure you fill in the instructions in the first column as they would execute. Instruction CC1 CC2 CC3 CC4 CC5 CC6 CC7 CC8 CC9 CC 10 CC 11 lw $t0, 0($t1) IF ID EX MEM WB add $t3, $t0, $t2 IF ID STALL EX MEM WB add $t0, $t1, $t2 IF STALL ID EX MEM WB sub $t1, $t0, $t3 IF ID EX MEM WB and $t2, $t0, $t1 IF ID EX MEM WB b. Which registers are read in clock cycle 3? $t0, $t2...
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- Summer '08
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- Following, Christopher Nolan, Stall, MEM WB
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