Implementation

• All registers (except load buffers) contain a pair {value,tag}

• The tag (or name) can be:

  • Zero (or a special pattern) meaning that the value is indeed a value
  • The name of a load buffer
  • The name of a reservation station within a functional unit

• A reservation station consists of :

  • The operation to be performed
  • 2 pairs (value,tag) (Vj,Qj) (Vk,Qk)
  • A flag indicating whether the accompanying f-u is busy or not

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