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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, 2009 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;
// Take CRC data and apply to testblock inputs
wire [31:0] in = crc[31:0];
/*AUTOWIRE*/
// Beginning of automatic wires (for undeclared instantiated-module outputs)
wire [63:0] out; // From test of Test.v
// End of automatics
wire reset_l = ~(cyc<15);
wire [63:0] d = crc[63:0];
wire [8:0] t_wa = crc[8:0];
wire [8:0] t_addr = {crc[18:17],3'b0,crc[13:10]};
Test test (/*AUTOINST*/
// Outputs
.out (out[63:0]),
// Inputs
.clk (clk),
.reset_l (reset_l),
.t_wa (t_wa[8:0]),
.d (d[63:0]),
.t_addr (t_addr[8:0]));
// Aggregate outputs into a single result vector
wire [63:0] result = {out};
// 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;
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;
// What checksum will we end up with (above print should match)
`define EXPECTED_SUM 64'h421a41d1541ea652
if (sum !== `EXPECTED_SUM) $stop;
$write("*-* All Finished *-*\n");
$finish;
end
end
endmodule
module Test (/*AUTOARG*/
// Outputs
out,
// Inputs
clk, reset_l, t_wa, d, t_addr
);
input clk;
input reset_l;
reg [63:0] m_w0 [47:0];
reg [63:0] m_w1 [23:0];
reg [63:0] m_w2 [23:0];
reg [63:0] m_w3 [23:0];
reg [63:0] m_w4 [23:0];
reg [63:0] m_w5 [23:0];
input [8:0] t_wa;
input [63:0] d;
always @ (posedge clk) begin
if (~reset_l) begin : blk
integer i;
for (i=0; i<48; i=i+1) begin
m_w0[i] <= 64'h0;
end
for (i=0; i<24; i=i+1) begin
m_w1[i] <= 64'h0;
m_w2[i] <= 64'h0;
m_w3[i] <= 64'h0;
m_w4[i] <= 64'h0;
m_w5[i] <= 64'h0;
end
end
else begin
casez (t_wa[8:6])
3'd0: m_w0[t_wa[5:0]] <= d;
3'd1: m_w1[t_wa[4:0]] <= d;
3'd2: m_w2[t_wa[4:0]] <= d;
3'd3: m_w3[t_wa[4:0]] <= d;
3'd4: m_w4[t_wa[4:0]] <= d;
default: m_w5[t_wa[4:0]] <= d;
endcase
end
end
input [8:0] t_addr;
wire [63:0] t_w0 = m_w0[t_addr[5:0]];
wire [63:0] t_w1 = m_w1[t_addr[4:0]];
wire [63:0] t_w2 = m_w2[t_addr[4:0]];
wire [63:0] t_w3 = m_w3[t_addr[4:0]];
wire [63:0] t_w4 = m_w4[t_addr[4:0]];
wire [63:0] t_w5 = m_w5[t_addr[4:0]];
output reg [63:0] out;
always @* begin
casez (t_addr[8:6])
3'd0: out = t_w0;
3'd1: out = t_w1;
3'd2: out = t_w2;
3'd3: out = t_w3;
3'd4: out = t_w4;
default: out = t_w5;
endcase
end
endmodule
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