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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, 2008 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0
module t (/*AUTOARG*/
// Inputs
clk
);
input clk;
integer cyc = 0;
reg [63:0] crc;
reg [63:0] sum;
wire [1:0] clkvec = crc[1:0];
/*AUTOWIRE*/
// Beginning of automatic wires (for undeclared instantiated-module outputs)
wire [1:0] count; // From test of Test.v
// End of automatics
Test test (/*AUTOINST*/
// Outputs
.count (count[1:0]),
// Inputs
.clkvec (clkvec[1:0]));
// Aggregate outputs into a single result vector
wire [63:0] result = {62'h0, count};
// 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;
end
else if (cyc<10) begin
sum <= 64'h0;
end
else if (cyc<90) begin
end
else if (cyc==99) begin
$write("[%0t] cyc==%0d crc=%x sum=%x\n", $time, cyc, crc, sum);
if (crc !== 64'hc77bb9b3784ea091) $stop;
`define EXPECTED_SUM 64'hfe8bac0bb1a0e53b
if (sum !== `EXPECTED_SUM) $stop;
$write("*-* All Finished *-*\n");
$finish;
end
end
endmodule
`ifdef T_TEST1
module Test
(
input wire [1:0] clkvec,
// verilator lint_off MULTIDRIVEN
output reg [1:0] count
// verilator lint_on MULTIDRIVEN
);
genvar igen;
generate
for (igen=0; igen<2; igen=igen+1) begin : code_gen
initial count[igen] = 1'b0;
always @ (posedge clkvec[igen])
count[igen] <= count[igen] + 1;
end
endgenerate
always @ (count) begin
$write("hi\n");
end
endmodule
`endif
`ifdef T_TEST2
module Test
(
input wire [1:0] clkvec,
// verilator lint_off MULTIDRIVEN
output reg [1:0] count
// verilator lint_on MULTIDRIVEN
);
genvar igen;
generate
for (igen=0; igen<2; igen=igen+1) begin : code_gen
wire clk_tmp = clkvec[igen];
// Unsupported: Count is multidriven, though if we did better analysis it wouldn't
// need to be.
initial count[igen] = 1'b0;
always @ (posedge clk_tmp)
count[igen] <= count[igen] + 1;
end
endgenerate
endmodule
`endif
`ifdef T_TEST3
module Test
(
input wire [1:0] clkvec,
output wire [1:0] count
);
genvar igen;
generate
for (igen=0; igen<2; igen=igen+1) begin : code_gen
wire clk_tmp = clkvec[igen];
reg tmp_count = 1'b0;
always @ (posedge clk_tmp) begin
tmp_count <= tmp_count + 1;
end
assign count[igen] = tmp_count;
end
endgenerate
endmodule
`endif
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