Fetch Module (cont).

• The fetch module has two BOOLEAN generics:

  • STATIC_PREDICTION and PREDICTION, defaults are FALSE.
  • If STATIC_PREDICTION = FALSE, then do dynamic branch prediction
  • If STATIC_PREDICTION = TRUE
    • If PREDICTION = TRUE, predict always taken
    • If PREDICTION = FALSE, predict always not taken
  • Maintain count of total conditional branchs, and number of mispredicted branches
  • Two VHDL configurations (taken_cfg, nottaken_cfg) are supplied which set these flags to the appropriate values for static prediction.

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