Question

The unit that preserves the history of each conditional branch is

(a) Branch Target Buffer (BTB)

(b) Branch History Table (BHT)

(c) Static prediction

(d) Dynamic prediction

I got this question in examination.

My question is taken from Netburst Microarchitecture For Pentium4 -2,  Instruction Translation Lookaside Buffer (ITLB) and Branch Prediction in chapter Pentium 4 processor of Microprocessor

Answer 1

Correct choice is (b) Branch History Table (BHT)

For explanation I would say: The Branch History Table (BHT) preserves the history of each conditional branch that the speculative branch prediction unit encounters during the last several cycles.