More on Shelving (Figure 7.11)

• Shelving buffers also called Reservation stations

• Shelving decouples instruction issue from dependency checking

  • Dependencies are resolved when instruction in shelving buffer is dispatched to an Execution Unit

• Shelving buffer organization (Figure 7.25)

  • One buffer per Execution Unit
  • One buffer serves a group of Execution Units
  • One buffer serves all Execution Units (Central Reservation Station)

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