88 lines
1.9 KiB
Systemverilog
88 lines
1.9 KiB
Systemverilog
// DESCRIPTION: Verilator: 4-level deep nested interface typedef with dependent localparams
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//
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// This program is free software; you can redistribute it and/or modify it
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// under the terms of either the GNU Lesser General Public License Version 3
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// or the Perl Artistic License Version 2.0.
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// SPDX-FileCopyrightText: 2026 Wilson Snyder
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// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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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 (%s !== %s)\n", `__FILE__,`__LINE__, (gotv), (expv), `"gotv`", `"expv`"); `stop; end while(0);
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// verilog_format: on
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package scp;
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typedef struct packed {
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int unsigned ABits;
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int unsigned BBits;
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} cfg_t;
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endpackage
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// Level 4: innermost interface
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interface d_if #(
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parameter d_p = 0
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) ();
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localparam int LP0 = d_p + 1;
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typedef logic [LP0-1:0] d_t;
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endinterface
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// Level 3
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interface c_if #(
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parameter c_p = 0
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) ();
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localparam int LP0 = c_p * 2;
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d_if #(LP0) d_inst ();
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typedef d_inst.d_t c_t;
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endinterface
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// Level 2
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interface b_if #(
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parameter scp::cfg_t cfg = 0
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) ();
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localparam int LP0 = cfg.ABits * cfg.BBits;
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c_if #(LP0) c_inst ();
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typedef c_inst.c_t b_t;
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endinterface
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// Level 1: outermost interface
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interface a_if #(
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parameter scp::cfg_t cfg = 0
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) ();
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b_if #(cfg) b_inst ();
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typedef b_inst.b_t a_t;
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endinterface
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module m #(
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parameter scp::cfg_t cfg = 0
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) (
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a_if io
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);
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typedef io.a_t a_t;
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initial begin
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#1;
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// cfg.ABits=2, cfg.BBits=3
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// b_if: LP0 = 2*3 = 6
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// c_if: c_p=6, LP0 = 6*2 = 12
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// d_if: d_p=12, LP0 = 12+1 = 13
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// d_t is 13 bits
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`checkd($bits(a_t), 13);
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end
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endmodule
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module t;
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localparam scp::cfg_t cfg = '{ABits : 2, BBits : 3};
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a_if #(cfg) a_io ();
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m #(cfg) m_inst (.io(a_io));
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initial begin
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#2;
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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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