More on reorder buffer
Reorder buffer extends Tomasulo’s scheme with the possibility of completing instructions in order
Reorder buffer entry contains (this is not the only possible solution)
- type of instruction (branch, store, ALU, or load)
- destination (none, memory address, register)
- value
Replaces load/store buffers
Reservation station tags and “true” register tags are now ids of entries in the reorder buffer