Fix usage of IF1 state in IF2 branch pred fallback logic (black-parro…

…t#878)
NALAYBUDY · May 25, 2021 · 7842ff4 · 7842ff4
1 parent 3d3db55
commit 7842ff4
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/bp_fe/src/v/bp_fe_pc_gen.sv b/bp_fe/src/v/bp_fe_pc_gen.sv
@@ -227,10 +227,10 @@ module bp_fe_pc_gen
      );
   assign return_addr_n = pc_if2_r + vaddr_width_p'(4);
 
-  wire btb_miss_ras = ~pred_if1_r.btb | (pc_if1_r != ras_tgt_lo);
-  wire btb_miss_br  = ~pred_if1_r.btb | (pc_if1_r != br_tgt_lo);
+  wire btb_miss_ras = pc_if1_r != ras_tgt_lo;
+  wire btb_miss_br  = pc_if1_r != br_tgt_lo;
   assign ovr_ret    = btb_miss_ras & is_ret;
-  assign ovr_taken  = btb_miss_br & ((is_br & pred_if1_r.bht[1]) | is_jal);
+  assign ovr_taken  = btb_miss_br & ((is_br & pred_if2_r.bht[1]) | is_jal);
   assign ovr_o      = ovr_taken | ovr_ret;
   assign br_tgt_lo  = pc_if2_r + scan_instr.imm;
   assign fetch_pc_o = pc_if2_r;