You are given the following code segment for this question. (1) add $t1, $t0, $v

Question

You are given the following code segment for this question.

(1)        add      $t1, $t0, $v0                #$t0 = $8 and $t1 = $9

(2)        add      $s1, $s2, $t1                #$s1 = $17 and $s2 = 18

(3)        lw        $s2, 8($s1)                                                        

(4)        sub       $v0, $s2, $v1

(5)        add      $s1, $s2, $v0      

(6)        add      $t0, $s1, $v0

1.1    How many cycles are needed if a MIPS processor does not have any forwarding logic?

1.2    How many cycles are needed if the best forwarding logic is added to the MIPS processor?

Explanation / Answer

1.1 5 cycles

1.2 6 cycles

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