mirror of
https://github.com/SikongJueluo/Mini-Nav.git
synced 2026-07-13 04:25:32 +08:00
SikongJueluo
0fbcd915bd
- Move CAM core modules (cam_core_banked, match_engine_pipeline, popcount_pipeline) to hw/rtl/core/ - Move noise modules (cam_read_noise, cam_write_noise, noise_mask_grouped) to hw/rtl/noise/ - Update Makefile include paths and VERILOG_SOURCES to reflect new layout - Update docs/experiments.md file path references - Add sim/results.xml to .gitignore - Bump devenv.lock dependencies
73 lines
2.3 KiB
Systemverilog
73 lines
2.3 KiB
Systemverilog
`timescale 1ns / 1ps
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module popcount_pipeline #(
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parameter int WIDTH = 512,
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parameter int ROW_BITS = 12,
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parameter int OUT_WIDTH = $clog2(WIDTH + 1)
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) (
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input logic clk,
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input logic rst_n,
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input logic valid_i,
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input logic [ROW_BITS-1:0] row_i,
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input logic [WIDTH-1:0] bits_i,
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output logic valid_o,
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output logic [ROW_BITS-1:0] row_o,
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output logic [OUT_WIDTH-1:0] count_o
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);
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localparam int GROUP = 8;
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localparam int NUM_GROUPS = WIDTH / GROUP;
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localparam int GROUP_COUNT_WIDTH = $clog2(GROUP + 1);
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localparam int STAGE1_GROUPS = NUM_GROUPS / 4;
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logic [GROUP_COUNT_WIDTH-1:0] group_counts [0:NUM_GROUPS-1];
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logic [OUT_WIDTH-1:0] partial_q [0:3];
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logic [OUT_WIDTH-1:0] sum_q;
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logic [ROW_BITS-1:0] row_s1_q, row_s2_q;
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logic valid_s1_q, valid_s2_q;
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logic [OUT_WIDTH-1:0] partial_comb [0:3];
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always_comb begin
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for (int g = 0; g < NUM_GROUPS; g++) begin
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group_counts[g] = '0;
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for (int b = 0; b < GROUP; b++) begin
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group_counts[g] = group_counts[g] + bits_i[g*GROUP + b];
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end
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end
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for (int p = 0; p < 4; p++) begin
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partial_comb[p] = '0;
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for (int g = 0; g < STAGE1_GROUPS; g++) begin
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partial_comb[p] = partial_comb[p] + group_counts[p*STAGE1_GROUPS + g];
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end
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end
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end
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always_ff @(posedge clk or negedge rst_n) begin
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if (!rst_n) begin
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valid_s1_q <= 1'b0;
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valid_s2_q <= 1'b0;
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valid_o <= 1'b0;
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row_s1_q <= '0;
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row_s2_q <= '0;
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row_o <= '0;
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sum_q <= '0;
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count_o <= '0;
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for (int p = 0; p < 4; p++) partial_q[p] <= '0;
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end else begin
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valid_s1_q <= valid_i;
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row_s1_q <= row_i;
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for (int p = 0; p < 4; p++) begin
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partial_q[p] <= partial_comb[p];
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end
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valid_s2_q <= valid_s1_q;
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row_s2_q <= row_s1_q;
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sum_q <= partial_q[0] + partial_q[1] + partial_q[2] + partial_q[3];
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valid_o <= valid_s2_q;
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row_o <= row_s2_q;
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count_o <= sum_q;
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end
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end
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endmodule
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