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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, 2024 by Antmicro.
// SPDX-License-Identifier: CC0-1.0
class Foo;
rand int a;
rand int b;
endclass
class Bar;
rand int x;
rand Foo foo;
constraint x_gt_0 {x > 0;};
function new;
foo = new;
endfunction
endclass
class Qux extends Bar;
rand int y;
constraint y_gt_x {y > x;};
constraint y_lt_10 {y < 10;};
function bit get_rand_mode();
return bit'(y.rand_mode());
endfunction
function void test;
logic ok = 0;
x.rand_mode(1);
if (x.rand_mode != 1) $stop; // Note no rand_mode parens
if (get_rand_mode() != 1) $stop;
y.rand_mode(0);
if (y.rand_mode() != 0) $stop; // Note has rand_mode parens
foo.a.rand_mode(0);
if (foo.a.rand_mode != 0) $stop; // Note no rand_mode parens
foo.b.rand_mode(1);
if (foo.b.rand_mode() != 1) $stop; // Note has rand_mode parens
for (int i = 0; i < 20; ++i) begin
x = 4;
y = 8;
foo.a = 15;
foo.b = 16;
void'(randomize());
if (x >= y) $stop;
if (x != 4) ok = 1;
if (y != 8) $stop;
if (foo.a != 15) $stop;
if (foo.b != 16) ok = 1;
end
if (!ok) $stop;
foo.b = 16;
foo.rand_mode(0);
if (foo.rand_mode == 1) $stop;
if (foo.a.rand_mode == 1) $stop;
if (foo.b.rand_mode == 0) $stop;
void'(randomize());
if (foo.a != 15) $stop;
if (foo.b != 16) $stop;
ok = 0;
foo.rand_mode(1);
if (foo.rand_mode == 0) $stop;
for (int i = 0; i < 20; ++i) begin
foo.a = 23;
foo.b = 42;
void'(randomize());
if (foo.a != 23) $stop;
if (foo.b != 42) ok = 1;
end
if (!ok) $stop;
endfunction
endclass
class Baz;
Qux qux;
function new();
qux = new;
endfunction
function void test;
qux.x = 42;
qux.rand_mode(0);
if (qux.x.rand_mode == 1) $stop;
void'(qux.randomize());
if (qux.x != 42) $stop;
endfunction
endclass
class Quux;
rand int x;
endclass
module t;
initial begin
logic ok = 0;
int res;
Baz baz = new;
Qux qux = new;
Quux quux = new;
baz.test;
qux.test;
qux.x.rand_mode(0);
if (qux.x.rand_mode == 1) $stop;
qux.y.rand_mode(1);
if (qux.y.rand_mode == 0) $stop;
qux.foo.a.rand_mode(1);
if (qux.foo.a.rand_mode == 0) $stop;
qux.foo.b.rand_mode(0);
if (qux.foo.b.rand_mode == 1) $stop;
for (int i = 0; i < 20; ++i) begin
qux.x = 5;
qux.y = 8;
qux.foo.a = 13;
qux.foo.b = 21;
res = qux.randomize() with {y > 5;};
if (qux.x >= qux.y) $stop;
if (qux.y <= 5) $stop;
if (qux.x != 5) $stop;
if (qux.y != 8) ok = 1;
if (qux.foo.a != 13) ok = 1;
if (qux.foo.b != 21) $stop;
end
if (!ok) $stop;
quux.x.rand_mode(0);
quux.x = 1000;
res = quux.randomize() with {x != 1000;};
if (quux.x != 1000) $stop;
quux.rand_mode(1);
res = quux.randomize() with {x != 1000;};
if (quux.x == 1000) $stop;
qux.x = 1024;
qux.y = 512;
qux.rand_mode(0);
if (qux.randomize() == 1) $stop;
$write("*-* All Finished *-*\n");
$finish;
end
endmodule
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