mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-08-26 15:28:57 +00:00
143 lines
3.2 KiB
Coq
143 lines
3.2 KiB
Coq
|
// 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
|