Central Processing Unit Q.32

32Data forwarding techniques can be used to speed up the operations in presence of data dependencies. Consider the following replacements of LHS with RHS.
(i) R1 ￫ Loc, Loc ￫ R2 ￫ R1 ￫ R2, R1 ￫ Loc
(ii) R1 ￫ Loc, Loc ￫ R2 ￫ R1 ￫ R2
(iii)R1 ￫ Loc, R2 ￫ Loc ￫ R1 ￫ Loc
(iv) R1 ￫ Loc, R2 ￫ Loc ￫ R2 ￫ Loc
In which of the following options, will be result of executing the RHS be the same as executing the LHS irrespective of the instructions that follow?

Option : None
Explanation : Only (i) Is true, as both registers and location are updated.

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