79 lines
1.9 KiB
Systemverilog
79 lines
1.9 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: 2003 Wilson Snyder
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// SPDX-License-Identifier: CC0-1.0
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module t (
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input clk
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);
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reg [43:0] mi;
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reg [5:0] index;
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integer indexi;
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reg read;
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initial begin
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// Static
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mi = 44'b01010101010101010101010101010101010101010101;
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if (mi[0] !== 1'b1) $stop;
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if (mi[1-:2] !== 2'b01) $stop;
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`ifdef VERILATOR
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// verilator lint_off SELRANGE
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if (mi[-1] !== 1'bx && mi[-1] !== 1'b0) $stop;
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if (mi[0-:2] !== 2'b1x && 1'b0) $stop;
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if (mi[-1-:2] !== 2'bxx && 1'b0) $stop;
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// verilator lint_on SELRANGE
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`else
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if (mi[-1] !== 1'bx) $stop;
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if (mi[0-:2] !== 2'b1x) $stop;
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if (mi[-1-:2] !== 2'bxx) $stop;
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`endif
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end
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integer cyc;
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initial cyc = 1;
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always @(posedge clk) begin
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if (cyc != 0) begin
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cyc <= cyc + 1;
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if (cyc == 1) begin
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mi = 44'h123;
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end
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if (cyc == 2) begin
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index = 6'd43;
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indexi = 43;
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end
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if (cyc == 3) begin
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read = mi[index];
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if (read !== 1'b0) $stop;
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read = mi[indexi];
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if (read !== 1'b0) $stop;
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end
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if (cyc == 4) begin
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index = 6'd44;
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indexi = 44;
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end
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if (cyc == 5) begin
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read = mi[index];
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$display("-Illegal read value: %x", read);
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//if (read!==1'b1 && read!==1'bx) $stop;
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read = mi[indexi];
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$display("-Illegal read value: %x", read);
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//if (read!==1'b1 && read!==1'bx) $stop;
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end
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if (cyc == 6) begin
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indexi = -1;
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end
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if (cyc == 7) begin
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read = mi[indexi];
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$display("-Illegal read value: %x", read);
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//if (read!==1'b1 && read!==1'bx) $stop;
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end
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if (cyc == 10) begin
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$write("*-* All Finished *-*\n");
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$finish;
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end
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end
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end
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endmodule
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