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102 lines
3.1 KiB
Verilog
102 lines
3.1 KiB
Verilog
// DESCRIPTION: Verilator: Verilog Test module
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//
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// This file ONLY is placed under the Creative Commons Public Domain, for
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// any use, without warranty, 2014 by Wilson Snyder.
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// SPDX-License-Identifier: CC0-1.0
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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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module t (/*AUTOARG*/);
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// verilator lint_off WIDTH
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wire [1:0] bug729_au = ~0;
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wire signed [1:0] bug729_as = ~0;
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wire [2:0] bug729_b = ~0;
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// the $signed output is unsigned because the input is unsigned; the signedness does not change.
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wire [0:0] bug729_yuu = $signed(2'b11) == 3'b111; //1'b0
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wire [0:0] bug729_ysu = $signed(2'SB11) == 3'b111; //1'b0
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wire [0:0] bug729_yus = $signed(2'b11) == 3'sb111; //1'b1
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wire [0:0] bug729_yss = $signed(2'sb11) == 3'sb111; //1'b1
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wire [0:0] bug729_zuu = 2'sb11 == 3'b111; //1'b0
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wire [0:0] bug729_zsu = 2'sb11 == 3'b111; //1'b0
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wire [0:0] bug729_zus = 2'sb11 == 3'sb111; //1'b1
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wire [0:0] bug729_zss = 2'sb11 == 3'sb111; //1'b1
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wire [3:0] bug733_a = 4'b0010;
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wire [3:0] bug733_yu = $signed(|bug733_a); // 4'b1111 note | is always unsigned
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wire signed [3:0] bug733_ys = $signed(|bug733_a); // 4'b1111
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wire [3:0] bug733_zu = $signed(2'b11); // 4'b1111
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wire signed [3:0] bug733_zs = $signed(2'sb11); // 4'b1111
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// When RHS of assignment is fewer bits than lhs, RHS sign or zero extends based on RHS's sign
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wire [3:0] bug733_qu = 2'sb11; // 4'b1111
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wire signed [3:0] bug733_qs = 2'sb11; // 4'b1111
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reg signed [32:0] bug349_s;
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reg signed [32:0] bug349_u;
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wire signed [1:0] sb11 = 2'sb11;
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wire [3:0] subout_u;
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sub sub (.a(2'sb11), .z(subout_u));
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initial `checkh(subout_u, 4'b1111);
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wire [5:0] cond_a = 1'b1 ? 3'sb111 : 5'sb11111;
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initial `checkh(cond_a, 6'b111111);
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wire [5:0] cond_b = 1'b0 ? 3'sb111 : 5'sb11111;
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initial `checkh(cond_b, 6'b111111);
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initial begin
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// verilator lint_on WIDTH
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`checkh(bug729_yuu, 1'b0);
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`checkh(bug729_ysu, 1'b0);
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`checkh(bug729_yus, 1'b1);
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`checkh(bug729_yss, 1'b1);
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`checkh(bug729_zuu, 1'b0);
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`checkh(bug729_zsu, 1'b0);
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`checkh(bug729_zus, 1'b1);
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`checkh(bug729_zss, 1'b1);
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`checkh(bug733_yu, 4'b1111);
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`checkh(bug733_ys, 4'b1111);
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`checkh(bug733_zu, 4'b1111);
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`checkh(bug733_zs, 4'b1111);
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`checkh(bug733_qu, 4'b1111);
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`checkh(bug733_qs, 4'b1111);
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// verilator lint_off WIDTH
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bug349_s = 4'sb1111;
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`checkh(bug349_s, 33'h1ffffffff);
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bug349_u = 4'sb1111;
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`checkh(bug349_u, 33'h1ffffffff);
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bug349_s = 4'sb1111 - 1'b1;
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`checkh(bug349_s,33'he);
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bug349_s = 4'sb1111 - 5'b00001;
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`checkh(bug349_s,33'he);
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case (2'sb11)
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4'b1111: ;
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default: $stop;
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endcase
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case (sb11)
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4'b1111: ;
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default: $stop;
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endcase
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$write("*-* All Finished *-*\n");
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$finish;
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end
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endmodule
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module sub (input [3:0] a,
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output [3:0] z);
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assign z = a;
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endmodule
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