2022-05-27 16:04:02 +00:00
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//leading zero counter i.e. priority encoder
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2022-06-01 23:34:29 +00:00
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module lzc #(parameter WIDTH = 1) (
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2022-05-27 16:04:02 +00:00
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input logic [WIDTH-1:0] num,
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2022-05-31 16:18:50 +00:00
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output logic [$clog2(WIDTH+1)-1:0] ZeroCnt
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2022-05-27 16:04:02 +00:00
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);
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2022-05-27 18:36:04 +00:00
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/* verilator lint_off CMPCONST */
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2022-07-04 04:40:47 +00:00
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/* verilator lint_off WIDTH */
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2022-05-27 16:04:02 +00:00
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2022-07-04 04:40:47 +00:00
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int i;
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2022-05-27 16:04:02 +00:00
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always_comb begin
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i = 0;
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2022-07-04 04:40:47 +00:00
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while (~num[WIDTH-1-i] & (i < WIDTH)) i = i+1; // search for leading one
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2022-05-27 16:04:02 +00:00
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ZeroCnt = i;
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end
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2022-07-04 04:40:47 +00:00
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/* verilator lint_on WIDTH */
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2022-05-27 18:36:04 +00:00
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/* verilator lint_on CMPCONST */
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2022-05-27 16:04:02 +00:00
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endmodule
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