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Fix performance bug on calls via BTB (#753)

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Signed-off-by: Gianmarco Ottavi <gianmarco@openhwgroup.org>

Co-authored-by: Gianmarco Ottavi <gianmarco@openhwgroup.org>
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Gianmarco Ottavi 2021-10-09 10:20:39 +02:00 • committed by GitHub
parent a90348ba71
commit 924ec9c2e0
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core/frontend/frontend.sv
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@ -151,7 +151,7 @@ module frontend import ariane_pkg::*; #(
// unconditional jumps with known target -> immediately resolved
assign is_jump[i] = instruction_valid[i] & (rvi_jump[i] | rvc_jump[i]);
// unconditional jumps with unknown target -> BTB
assign is_jalr[i] = instruction_valid[i] & ~is_return[i] & ~is_call[i] & (rvi_jalr[i] | rvc_jalr[i] | rvc_jr[i]);
assign is_jalr[i] = instruction_valid[i] & ~is_return[i] & (rvi_jalr[i] | rvc_jalr[i] | rvc_jr[i]);
end
// taken/not taken