Classification of 2-level (correlated) branch predictors
How many global registers and their length:
- GA: Global (one)
- PA: One per branch address (Local)
- SA: Group several branch addresses
How many PHT’s:
- g: Global (one)
- p : One per branch address
- s: Group several branch addresses
Previous slide was GAg (6,2)
- The “6” refers to the length of the global register
- The “2” means we are using 2-bit counters