70 lines
1.9 KiB
Systemverilog
70 lines
1.9 KiB
Systemverilog
// DESCRIPTION: Verilator: Verilog Test module
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//
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// Tests: static/type-level get_coverage() with multiple instances,
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// progressive coverage queries via get_inst_coverage(), and dynamic
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// instance creation (including nested-scope instances).
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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, 2024 by Wilson Snyder.
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// SPDX-FileCopyrightText: 2024 Wilson Snyder
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// SPDX-License-Identifier: CC0-1.0
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module t;
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// cg: three bins; used for multiple-instance and progressive-query tests
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covergroup cg;
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coverpoint data {
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bins low = {[0:1]};
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bins mid = {[2:3]};
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bins high = {[4:5]};
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}
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endgroup
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// cg2: two bins; used for dynamic (new) instance creation test
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covergroup cg2;
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coverpoint data {
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bins low = {[0:1]};
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bins high = {[2:3]};
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}
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endgroup
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int data;
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initial begin
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// Declare all handles before any statements
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cg cg1, cg2_unused, cg3, cg_q;
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cg2 dyn_inst;
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// Multiple static instances: each samples a different bin
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cg1 = new;
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cg2_unused = new;
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cg3 = new;
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data = 0; cg1.sample(); // low
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data = 2; cg2_unused.sample(); // mid
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data = 4; cg3.sample(); // high
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// Progressive coverage query via get_inst_coverage()
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cg_q = new;
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data = 0; cg_q.sample();
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$display("After low: %0.1f%%", cg_q.get_inst_coverage());
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data = 2; cg_q.sample();
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$display("After mid: %0.1f%%", cg_q.get_inst_coverage());
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data = 4; cg_q.sample();
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$display("After high: %0.1f%%", cg_q.get_inst_coverage());
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// Dynamic instance creation (from t_covergroup_dynamic)
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dyn_inst = new;
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data = 0; dyn_inst.sample(); // low
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data = 2; dyn_inst.sample(); // high
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begin
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cg2 dyn2;
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dyn2 = new;
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data = 0; dyn2.sample(); // low
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end
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$write("*-* All Finished *-*\n");
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$finish;
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end
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endmodule
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