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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, 2003 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0
module t (/*AUTOARG*/
// Inputs
clk
);
input clk;
integer cyc; initial cyc=1;
// [16] is SV syntax for [0:15]
reg [7:0] memory8_16 [16];
reg m_we;
reg [3:1] m_addr;
reg [15:0] m_data;
always @ (posedge clk) begin
// Load instructions from cache
memory8_16[{m_addr,1'd0}] <= 8'hfe;
if (m_we) begin
{memory8_16[{m_addr,1'd1}],
memory8_16[{m_addr,1'd0}]} <= m_data;
end
end
reg [7:0] memory8_16_4;
reg [7:0] memory8_16_5;
// Test complicated sensitivity lists
always @ (memory8_16[4][7:1] or memory8_16[5]) begin
memory8_16_4 = memory8_16[4];
memory8_16_5 = memory8_16[5];
end
always @ (posedge clk) begin
m_we <= 0;
if (cyc!=0) begin
cyc <= cyc + 1;
if (cyc==1) begin
m_we <= 1'b1;
m_addr <= 3'd2;
m_data <= 16'h55_44;
end
if (cyc==2) begin
m_we <= 1'b1;
m_addr <= 3'd3;
m_data <= 16'h77_66;
end
if (cyc==3) begin
m_we <= 0; // Check we really don't write this
m_addr <= 3'd3;
m_data <= 16'h0bad;
end
if (cyc==5) begin
if (memory8_16_4 != 8'h44) $stop;
if (memory8_16_5 != 8'h55) $stop;
if (memory8_16[6] != 8'hfe) $stop;
if (memory8_16[7] != 8'h77) $stop;
$write("*-* All Finished *-*\n");
$finish;
end
end
end
endmodule
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