86 lines
2.2 KiB
Systemverilog
Executable File
86 lines
2.2 KiB
Systemverilog
Executable File
// DESCRIPTION: Verilator: Verilog Test module
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//
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// This file ONLY is placed under the Creative Commons Public Domain, for
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// any use, without warranty, 2025 by PlanV GmbH.
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// SPDX-License-Identifier: CC0-1.0
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class Inner;
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rand int val;
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constraint c_local { val inside {[1:5]}; }
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function new(); val = 0; endfunction
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endclass
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class Mid;
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int limit;
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rand int x;
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rand Inner inner;
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constraint c_mid { x == limit; }
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function new(int lim);
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limit = lim;
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inner = new();
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endfunction
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endclass
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class Top;
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rand Mid m1;
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rand Mid m2;
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rand int y;
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constraint c_global {
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m1.inner.val < m2.inner.val;
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y > m1.x;
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y < m2.x;
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m1.inner.val + m2.inner.val < 8;
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}
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function new();
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m1 = new(3);
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m2 = new(5);
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y = 0;
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endfunction
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endclass
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module t_constraint_global_random;
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int success;
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Top t;
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initial begin
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t = new();
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// Test 1: Regular randomize() with global constraints
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success = t.randomize();
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if (success != 1) $stop;
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// $display("m1.x=%0d, m2.x=%0d, y=%0d", t.m1.x, t.m2.x, t.y);
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// $display("m1.inner.val=%0d, m2.inner.val=%0d", t.m1.inner.val, t.m2.inner.val);
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if (t.m1.x != 3 || t.m2.x != 5) $stop;
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if (t.m1.inner.val >= t.m2.inner.val) $stop;
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if (t.y <= t.m1.x || t.y >= t.m2.x) $stop;
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if (t.m1.inner.val + t.m2.inner.val >= 8) $stop;
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if (t.m1.inner.val < 1 || t.m1.inner.val > 5 ||
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t.m2.inner.val < 1 || t.m2.inner.val > 5) $stop;
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// Test 2: randomize() with inline constraint on global-constrained members
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success = 0;
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success = t.randomize() with {
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m1.inner.val == 2;
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m2.inner.val == 5;
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};
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if (success != 1) $stop;
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// Verify inline constraints
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if (t.m1.inner.val != 2) $stop;
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if (t.m2.inner.val != 5) $stop;
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// Verify global constraints still hold
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if (t.m1.x != 3 || t.m2.x != 5) $stop;
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if (t.m1.inner.val >= t.m2.inner.val) $stop;
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if (t.y <= t.m1.x || t.y >= t.m2.x) $stop;
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if (t.m1.inner.val + t.m2.inner.val >= 8) $stop;
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$write("*-* All Finished *-*\n");
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$finish;
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end
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endmodule
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