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// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2011 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0
//
// bug354
typedef logic [5:0] data_t;
module t (/*AUTOARG*/
// Inputs
clk
);
input clk;
integer cyc = 0;
reg [63:0] crc;
reg [63:0] sum;
// Take CRC data and apply to testblock inputs
wire rst;
data_t iii_in = crc[5:0];
data_t jjj_in = crc[11:6];
data_t iii_out;
data_t jjj_out;
logic [1:0] ctl0 = crc[63:62];
aaa aaa (.*);
// Aggregate outputs into a single result vector
wire [63:0] result = {64'h0};
// Test loop
always @ (posedge clk) begin
`ifdef TEST_VERBOSE
$write("[%0t] cyc==%0d crc=%x result=%x\n", $time, cyc, crc, result);
`endif
cyc <= cyc + 1;
crc <= {crc[62:0], crc[63] ^ crc[2] ^ crc[0]};
sum <= result ^ {sum[62:0], sum[63] ^ sum[2] ^ sum[0]};
if (cyc==0) begin
// Setup
crc <= 64'h5aef0c8d_d70a4497;
sum <= 64'h0;
rst <= 1'b0;
end
else if (cyc<10) begin
sum <= 64'h0;
rst <= 1'b1;
end
else if (cyc<90) begin
rst <= 1'b0;
end
else if (cyc==99) begin
$write("[%0t] cyc==%0d crc=%x sum=%x\n", $time, cyc, crc, sum);
if (crc !== 64'hc77bb9b3784ea091) $stop;
// What checksum will we end up with (above print should match)
`define EXPECTED_SUM 64'h4afe43fb79d7b71e
if (sum !== `EXPECTED_SUM) $stop;
$write("*-* All Finished *-*\n");
$finish;
end
end
endmodule
module bbb
(
output data_t ggg_out[1:0],
input data_t ggg_in [1:0],
input [1:0] [1:0] ctl,
input logic clk,
input logic rst
);
genvar i;
generate
for (i=0; i<2; i++) begin: PPP
always_ff @(posedge clk) begin
if (rst) begin
ggg_out[i] <= 6'b0;
end
else begin
if (ctl[i][0]) begin
if (ctl[i][1]) begin
ggg_out[i] <= ~ggg_in[i];
end else begin
ggg_out[i] <= ggg_in[i];
end
end
end
end
end
endgenerate
endmodule
module aaa
(
input data_t iii_in,
input data_t jjj_in,
input [1:0] ctl0,
output data_t iii_out,
output data_t jjj_out,
input logic clk,
input logic rst
);
// Below is a bug; {} concat isn't used to make arrays
bbb bbb (
.ggg_in ({jjj_in, iii_in}),
.ggg_out ({jjj_out, iii_out}),
.ctl ({{1'b1,ctl0[1]}, {1'b0,ctl0[0]}}),
.*);
endmodule
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