76 lines
2.3 KiB
Systemverilog
76 lines
2.3 KiB
Systemverilog
// DESCRIPTION: Verilator: Verilog Test module
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//
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// This file ONLY is placed under the Creative Commons Public Domain.
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// SPDX-FileCopyrightText: 2026 PlanV GmbH
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// SPDX-License-Identifier: CC0-1.0
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// verilog_format: off
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`define stop $stop
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`define checkd(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d: got=%0d exp=%0d\n", `__FILE__,`__LINE__, (gotv), (expv)); `stop; end while(0);
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`define check_range(gotv,minv,maxv) do if ((gotv) < (minv) || (gotv) > (maxv)) begin $write("%%Error: %s:%0d: got=%0d exp=%0d-%0d\n", `__FILE__,`__LINE__, (gotv), (minv), (maxv)); `stop; end while(0);
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// verilog_format: on
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// Test: 'this' keyword inside inline randomize() with {} constraint blocks.
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// 'this' should refer to the object being randomized (IEEE 1800-2023 18.7).
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class DataItem;
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rand bit [7:0] value;
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rand bit [7:0] limit;
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constraint default_con {limit inside {[8'd50 : 8'd200]};}
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endclass
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// Test 4: 'this' in inline constraint called from another class method.
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// 'this' must bind to the randomized object, not the calling class.
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class Caller;
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rand bit [7:0] own_value;
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function int do_rand(DataItem item);
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return item.randomize() with {
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this.value > 8'd30;
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this.value < 8'd40;
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};
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endfunction
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endclass
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module t;
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initial begin
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automatic DataItem item = new();
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automatic Caller caller = new();
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automatic int rand_ok;
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// Test 1: 'this.member' in inline constraint from module-level code
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rand_ok = item.randomize() with {
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this.value > 8'd10;
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this.value < 8'd50;
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};
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`checkd(rand_ok, 1)
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`check_range(item.value, 11, 49)
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`check_range(item.limit, 50, 200)
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// Test 2: multiple 'this.member' references
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rand_ok = item.randomize() with {
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this.value > 8'd20;
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this.value < 8'd30;
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};
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`checkd(rand_ok, 1)
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`check_range(item.value, 21, 29)
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// Test 3: mix of 'this.member' and unqualified member
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rand_ok = item.randomize() with {
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this.value > 8'd5;
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this.value < 8'd100;
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limit > 8'd150;
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};
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`checkd(rand_ok, 1)
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`check_range(item.value, 6, 99)
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`check_range(item.limit, 151, 200)
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// Test 4: 'this' binds to randomized object, not calling class
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rand_ok = caller.do_rand(item);
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`checkd(rand_ok, 1)
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`check_range(item.value, 31, 39)
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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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