branch prediction understanding

[KinzaQamar]

Hi,
I saw these lines in el2_ifu_bp_Ctl.sv
https://github.com/chipsalliance/Cores-SweRV-EL2/blob/7045b803cab825bc3bb3dbca0cb019e55098acc4/design/ifu/el2_ifu_bp_ctl.sv#L669-L692

What is the difference between btb_rd_addr_p1_f and btb_rd_addr_f?
Similarly, the difference between btb_bank0_rd_data_way0_p1_f and btb_bank0_rd_data_way0_f?
Also, if anyone could illustrate the for loop and if statement.