A reservation station has two inputs and produces an output.
These reservation stations use 2 floating point register values and produces and output to be stored in a third floating point register.

• An Add reservation station can be used to do an add or a subtract.
• A Multiply reservation station can be used to do an multiply or a divide.
• Each reservation station has a ID: Add1, Add2, Add3, ..., Mult1, Mult2, Mult3, ...

Initialization: Mark yourself free

Inputs: You are given:

• An operation to perform (fadd, fsub or fmul, fdiv)
• Two source register numbers (in order)
• A destination register number

On Issue:

• Mark yourself busy
• Get source register values or reservation station IDs from the register file
• Reserve the destination register by giving the register file your ID and the destination register number.

After Issue:

• If either or both inputs are reservation station IDs, monitor the CDB for values until both are available
• Wait for an appropriate functional unit to be available (fadd or fmult)
• Give the source values and the operation to the functional unit and wait for the result
• Put the result along with your ID on the CDB.
• Mark yourself free when you see your ID on the CDB