mirror of https://github.com/YosysHQ/yosys.git
83 lines
1.5 KiB
Verilog
83 lines
1.5 KiB
Verilog
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// test cases found using vloghammer
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// https://github.com/cliffordwolf/VlogHammer
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module test01(a, y);
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input [7:0] a;
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output [3:0] y;
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assign y = ~a >> 4;
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endmodule
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module test02(a, y);
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input signed [3:0] a;
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output signed [4:0] y;
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assign y = (~a) >> 1;
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endmodule
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module test03(a, b, y);
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input [2:0] a;
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input signed [1:0] b;
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output y;
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assign y = ~(a >>> 1) == b;
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endmodule
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module test04(a, y);
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input a;
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output [1:0] y;
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assign y = ~(a - 1'b0);
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endmodule
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// .. this test triggers a bug in xilinx isim.
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// module test05(a, y);
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// input a;
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// output y;
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// assign y = 12345 >> {a, 32'd0};
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// endmodule
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// .. this test triggers a bug in icarus verilog.
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// module test06(a, b, c, y);
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// input signed [3:0] a;
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// input signed [1:0] b;
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// input signed [1:0] c;
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// output [5:0] y;
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// assign y = (a >> b) >>> c;
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// endmodule
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module test07(a, b, y);
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input signed [1:0] a;
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input signed [2:0] b;
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output y;
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assign y = 2'b11 != a+b;
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endmodule
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module test08(a, b, y);
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input [1:0] a;
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input [1:0] b;
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output y;
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assign y = a == ($signed(b) >>> 1);
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endmodule
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module test09(a, b, c, y);
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input a;
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input signed [1:0] b;
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input signed [2:0] c;
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output [3:0] y;
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assign y = a ? b : c;
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endmodule
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module test10(a, b, c, y);
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input a;
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input signed [1:0] b;
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input signed [2:0] c;
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output y;
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assign y = ^(a ? b : c);
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endmodule
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// module test11(a, b, y);
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// input signed [3:0] a;
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// input signed [3:0] b;
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// output signed [5:0] y;
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// assign y = -(5'd27);
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// endmodule
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