Mis-Prediction Recovery
Must place a tag on each instruction that indicates what speculative branch this belongs to
When Branch Unit computes the condition, the DRR and CRS examine output of branch Unit
- If mis-prediction, then any CRS entries and ROB entries with that tag are marked as FREE, essentially killing those instructions
- Marking CRS entries as free will keep them from being issued
Fetch Unit will have to examine Branch Unit output and choose alternate PC value for next fetch.