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lfsr: Clean up LFSR implementation

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
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Alex Forencich
2025-06-11 00:35:36 -07:00
parent 4e7e39828b
commit f7315b7675
1 changed files with 15 additions and 13 deletions
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28
src/lfsr/rtl/taxi_lfsr.sv
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@@ -327,21 +327,23 @@ endfunction
wire [OUT_W-1:0][IN_W-1:0] mask = lfsr_mask();
for (genvar n = 0; n < LFSR_W; n = n + 1) begin : lfsr_state
if (DATA_IN_EN) begin
assign state_out[n] = ^({data_in, state_in} & mask[n]);
end else begin
assign state_out[n] = ^(state_in & mask[n]);
end
wire [IN_W-1:0] lfsr_in;
wire [OUT_W-1:0] lfsr_out;
if (DATA_IN_EN) begin
assign lfsr_in = {data_in, state_in};
end else begin
assign lfsr_in = state_in;
end
for (genvar n = 0; n < OUT_W; n = n + 1) begin
assign lfsr_out[n] = ^(lfsr_in & mask[n]);
end
assign state_out = lfsr_out[0 +: LFSR_W];
if (DATA_OUT_EN) begin
for (genvar n = 0; n < DATA_W; n = n + 1) begin : lfsr_data
if (DATA_IN_EN) begin
assign data_out[n] = ^({data_in, state_in} & mask[n+LFSR_W]);
end else begin
assign data_out[n] = ^(state_in & mask[n+LFSR_W]);
end
end
assign data_out = lfsr_out[LFSR_W +: DATA_W];
end else begin
assign data_out = '0;
end