Reservation stations
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Reservation Stations are decentralized features of the microarchitecture of a CPU that allow for register renaming, and are used by the Tomasulo algorithm for dynamic instruction scheduling.
Reservation stations permit the CPU to fetch and re-use a data value as soon as it has been computed, rather than waiting for it to be stored in a register and re-read. When instructions are issued, they can designate the reservation station from which they want their input to read. When multiple instructions need to write to the same register, all can proceed and only the (logically) last one need actually be written.
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