Implementation

• All registers (except load buffers) contain a tag (Qi) indicating which f-u will compute its contents OR a value

• The tag (or name) can be:

  • Zero (or a special pattern) meaning that we have a value
  • the name of a load buffer
  • the name of 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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