145 lines
3.0 KiB
Verilog
145 lines
3.0 KiB
Verilog
//
|
|
// Copyright (c) 1999 Steven Wilson (stevew@home.com)
|
|
//
|
|
// This source code is free software; you can redistribute it
|
|
// and/or modify it in source code form under the terms of the GNU
|
|
// General Public License as published by the Free Software
|
|
// Foundation; either version 2 of the License, or (at your option)
|
|
// any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
//
|
|
// SDW - Validate variable right shift in function
|
|
|
|
|
|
module main;
|
|
|
|
reg globvar;
|
|
|
|
reg [7:0] var1,var2,var3;
|
|
reg error;
|
|
reg [7:0] value;
|
|
|
|
function [7:0] rshft;
|
|
input [7:0] var1,var2;
|
|
begin
|
|
rshft = var1 >> var2;
|
|
end
|
|
endfunction
|
|
|
|
initial
|
|
begin
|
|
error = 0;
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h7;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h1)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 7 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h6;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h2)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 6 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h5;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h4)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 5 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h4;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h8)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 4 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h3;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h10)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 3 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h2;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h20)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 2 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h1;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h40)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 1 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'h80;
|
|
var2 = 8'h0;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h80)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - 80 >> 0 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'ha5;
|
|
var2 = 8'h7;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h01)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - a5 >> 7 is %h",value);
|
|
end
|
|
#1 ;
|
|
var1 = 8'ha5;
|
|
var2 = 8'h1;
|
|
value = rshft(var1,var2);
|
|
#1;
|
|
if(value !== 8'h52)
|
|
begin
|
|
error = 1;
|
|
$display ("FAILED - aa >> 1 is %h",value);
|
|
end
|
|
if(error === 0)
|
|
$display("PASSED");
|
|
end
|
|
|
|
endmodule // main
|