72 lines
2.1 KiB
Systemverilog
72 lines
2.1 KiB
Systemverilog
// DESCRIPTION: Verilator: Verilog Test module
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//
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// Module-instance parameter pins whose value chains through a
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// class-scope-resolved localparam (typedef alias of a parameterized
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// class, e.g. inst::b). V3LinkDot defers the inst::b Dot until
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// post-V3Param; the cell deparam must follow VarRefs into any
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// deferred lparam reachable from the pin tree and resolve its Dots
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// inline so constify on the cell can fold.
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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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module Sub #(
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parameter int WIDTH
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) ();
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endmodule
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// Two-level: outer module forwards its param to an inner cell, so the
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// deferred lparam value must flow through the cell-deparam chain.
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module SubL1 #(
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parameter int W
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) ();
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Sub #(W) inner ();
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endmodule
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module t;
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virtual class C #(
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parameter int a
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);
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localparam int b = a;
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endclass
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typedef C#(4) c4;
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typedef C#(5) c5;
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typedef C#(8) c8;
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// Deferred lparams (value contains class::member Dot)
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localparam int b4 = c4::b;
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localparam int b5 = c5::b;
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localparam int b8 = c8::b;
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// Chained: value references another deferred lparam
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localparam int c8_ref = b8;
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localparam int d8_ref = c8_ref + 1;
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// Pin is bare VarRef to a deferred lparam
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Sub #(b8) m_bare ();
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// Pin chains through multiple deferred lparams (b8 -> c8_ref -> d8_ref)
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Sub #(d8_ref) m_chain ();
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// Pin is an expression mixing two deferred lparams
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Sub #(b4 + b5) m_expr ();
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// Pin mixes a Dot and a deferred lparam in the same expression
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Sub #(c4::b + b5) m_mix ();
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// Two-level: outer module forwards param to inner cell
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SubL1 #(b8) m_l1 ();
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initial begin
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`checkh(b4, 32'd4);
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`checkh(b5, 32'd5);
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`checkh(b8, 32'd8);
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`checkh(c8_ref, 32'd8);
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`checkh(d8_ref, 32'd9);
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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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