Chapter 5

Prefetch Unit

This chapter describes how the PreFetch Unit (PFU), in conjunction with the DPU, uses program flow prediction to locate branches in the instruction stream and the strategies used to determine if a branch is likely to be taken or not. It contains the following sections:

About the prefetch unit on page 5-2

Branch prediction on page 5-3

Return stack on page 5-5.

ARM DDI 0363E

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ARM R4F, r1p3 manual Prefetch Unit