Implementation
Use a branch predictor buffer.
Single entry may correspond to different branches at the same point.
A 64-entry buffer is shown in Fig.4.20.
2-bit predictor just like the one shown in slide #23.
2-bit global history. So it is (2,2) predictio scheme. Last two branches in the program are considered.
Indexing is by 4-bits of branch address and 2-bits of global history.