Sum of Data dependencies

Question

$I_1 :  MUL \ \ \ \ \   R_1,  R_2, R_3$        // $R_1 \leftarrow R_2 \times R_3$

$I_2 :  ADD \ \ \ \ \   R_4,  R_4, R_1$

$I_3 :  MUL \ \ \ \ \   R_1,  R_5, R_6$

$I_4 :  SUB \ \ \ \ \   R_4,  R_4, R_1$

 

Sum of RAW, WAR and WAW dependencies is  _____.

Comments

Is this question is self made?

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partially, i don't have answer key for this

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Answer should be 7

I1 - I4 should not be considered for RAW dependency...

Answer 1

Answer should be 7

RAW = 3

WAW = 2

WAW = 2

Answer 2

3+2+2=7

RAW(1-2,2-4,3-4)

WAR(2-3,2-4)

WAW(1-3,2-4)