75 lines
2.3 KiB
Systemverilog
75 lines
2.3 KiB
Systemverilog
// DESCRIPTION: Verilator: Verilog Test module
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//
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// References to a parameterized-class typedef (r#(N)::t) buried inside
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// unit-scope struct/union typedefs, passed as interface type-parameter
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// values. Exercises resolveParamClassRefDType's recursion into
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// NodeUOrStructDType members across several container shapes and a
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// non-default parameter value.
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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 Wilson Snyder
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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 checkh(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d: got='h%x exp='h%x\n", `__FILE__,`__LINE__, (gotv), (expv)); `stop; end while(0)
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// verilog_format: on
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class r #(parameter int W = 1);
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typedef struct packed { logic [W-1:0] unused; } t;
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endclass
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// Plain struct member, default param
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typedef struct packed { r#(1)::t f; } tf_struct;
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// Union member, default param
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typedef union packed { r#(1)::t a; logic [0:0] b; } tf_union;
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// Non-default param value (forces class r to be specialized, not reused)
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typedef struct packed { r#(7)::t f; } tf_nondefault;
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// Reference two levels deep, exercising the self-recursion
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typedef struct packed {
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struct packed { r#(1)::t f; } inner;
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} tf_nested;
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interface ifc #(parameter type T = logic);
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endinterface
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module t;
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ifc #(.T(tf_struct)) bad_struct ();
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ifc #(.T(tf_union)) bad_union ();
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ifc #(.T(tf_nondefault)) bad_nondefault ();
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ifc #(.T(tf_nested)) bad_nested ();
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initial begin
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tf_struct v_struct;
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tf_union v_union;
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tf_nondefault v_nondefault;
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tf_nested v_nested;
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// Widths follow the specialized class parameter
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`checkh($bits(tf_struct), 32'd1);
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`checkh($bits(tf_union), 32'd1);
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`checkh($bits(tf_nondefault), 32'd7);
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`checkh($bits(tf_nested), 32'd1);
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// Write/read through the buried r#(N)::t member to make sure
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// the resolved type behaves as a real packed value
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v_struct.f.unused = 1'b1;
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`checkh(v_struct.f.unused, 1'b1);
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v_nondefault.f.unused = 7'h5a;
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`checkh(v_nondefault.f.unused, 7'h5a);
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v_nested.inner.f.unused = 1'b1;
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`checkh(v_nested.inner.f.unused, 1'b1);
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v_union.a.unused = 1'b1;
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`checkh(v_union.b, 1'b1);
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$write("*-* All Finished *-*\n");
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$finish;
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end
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endmodule
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