Example - comparison
Bits used by the regular predictor Vs correlating predictor:
How many bits are in a regular 2-bit predictor and how many bits are needed for Fig.4.20?
General formula: pow(2,m) * number of prediction bits * buffer size
Text has typo: pow(2,0) is typed in as 20!
Regular: pow(2,0) * 2 * 4K (cache) = 8K
Correlated: pow(2,2) * 2* 16 = 4*2*16 = 128bits