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89 lines
2.5 KiB
Systemverilog
89 lines
2.5 KiB
Systemverilog
// DESCRIPTION: Verilator: Unpacked struct values as class parameters
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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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package P;
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typedef struct {int depth;} memory_config_t;
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typedef struct {
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memory_config_t memory;
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int counters;
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} config_t;
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virtual class cfg #(
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parameter config_t C
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);
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localparam int WIDTH = $clog2(C.memory.depth);
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localparam int COUNTERS = C.counters;
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typedef logic [WIDTH-1:0] data_t;
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endclass
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localparam config_t PKG_CFG = '{memory: '{depth: 8192}, counters: 6};
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typedef cfg#(PKG_CFG) PkgCfg;
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endpackage
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package Q;
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localparam P::config_t CFG = '{memory: '{depth: 1024}, counters: 3};
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typedef P::cfg#(CFG) CrossPkgCfg;
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endpackage
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module Sub #(
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parameter P::config_t C
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) (
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input P::cfg#(C)::data_t din
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);
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initial begin
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`checkh($bits(din), $clog2(C.memory.depth));
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`checkh(C.counters, P::cfg#(C)::COUNTERS);
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end
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endmodule
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module t;
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localparam P::config_t CFG_A = '{memory: '{depth: 4096}, counters: 4};
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localparam P::config_t CFG_B = '{memory: '{depth: 32768}, counters: 7};
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// Equal to CFG_A, so must select the same Sub specialization.
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localparam P::config_t CFG_A2 = '{memory: '{depth: 4096}, counters: 4};
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// Differs from CFG_A only in a nested field, so must not share with it.
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localparam P::config_t CFG_C = '{memory: '{depth: 4096}, counters: 5};
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P::cfg#(CFG_A)::data_t a;
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P::cfg#(CFG_B)::data_t b;
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P::PkgCfg::data_t pkg;
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Q::CrossPkgCfg::data_t cross_pkg;
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P::cfg#(CFG_A2)::data_t a2;
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P::cfg#(CFG_C)::data_t c;
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Sub #(.C(CFG_A)) sub (.din(a));
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Sub #(.C(CFG_A2)) sub_same (.din(a2));
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Sub #(.C(CFG_C)) sub_diff (.din(c));
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initial begin
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a = '0;
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b = '0;
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pkg = '0;
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cross_pkg = '0;
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a2 = '0;
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c = '0;
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`checkh($bits(a), 12);
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`checkh($bits(b), 15);
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`checkh($bits(pkg), 13);
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`checkh($bits(cross_pkg), 10);
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`checkh(P::cfg#(CFG_A)::COUNTERS, 4);
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`checkh(P::cfg#(CFG_B)::COUNTERS, 7);
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// Equal struct values must specialize identically, unequal ones distinctly.
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`checkh($bits(a2), $bits(a));
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`checkh(P::cfg#(CFG_A2)::COUNTERS, 4);
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`checkh(P::cfg#(CFG_C)::COUNTERS, 5);
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$write("*-* All Finished *-*\n");
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$finish;
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end
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endmodule
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