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// test cases found using vloghammer
// https://github.com/cliffordwolf/VlogHammer
module test01(a, y);
input [7:0] a;
output [3:0] y;
assign y = ~a >> 4;
endmodule
module test02(a, y);
input signed [3:0] a;
output signed [4:0] y;
assign y = (~a) >> 1;
endmodule
module test03(a, b, y);
input [2:0] a;
input signed [1:0] b;
output y;
assign y = ~(a >>> 1) == b;
endmodule
module test04(a, y);
input a;
output [1:0] y;
assign y = ~(a - 1'b0);
endmodule
// .. this test triggers a bug in xilinx isim.
// module test05(a, y);
// input a;
// output y;
// assign y = 12345 >> {a, 32'd0};
// endmodule
// .. this test triggers a bug in icarus verilog.
// module test06(a, b, c, y);
// input signed [3:0] a;
// input signed [1:0] b;
// input signed [1:0] c;
// output [5:0] y;
// assign y = (a >> b) >>> c;
// endmodule
module test07(a, b, y);
input signed [1:0] a;
input signed [2:0] b;
output y;
assign y = 2'b11 != a+b;
endmodule
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