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Fix one hot mux assertion for branch predictor

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Chris Keilbart 2024-09-22 19:13:16 -07:00
parent 5dfcdcb9cb
commit 03d52f4458
1 changed files with 18 additions and 1 deletions
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19
core/common_components/one_hot_mux.sv
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@ -62,8 +62,25 @@ module one_hot_mux
////////////////////////////////////////////////////
//Assertions
//Support inputs that aren't one hot as long as they are identical
logic supported_inputs;
logic saw_first;
casted_t queried_input;
always_comb begin
supported_inputs = 1;
saw_first = 0;
queried_input = 'x;
for (int i = 0; i < OPTIONS; i++) begin
if (one_hot[i]) begin
supported_inputs |= ~saw_first | (queried_input == choices_casted[i]);
saw_first = 1;
queried_input = choices_casted[i];
end
end
end
ohot_assertion:
assert property (@(posedge clk) disable iff (rst) $onehot0(one_hot))
assert property (@(posedge clk) disable iff (rst) supported_inputs)
else $error("Selection mux not one hot");
endmodule