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module test_signed(a, b, c, d, y);
input [3:0] a, b, c;
input signed [3:0] d;
output reg [7:0] y;
always @* begin
if (a && b)
y = c;
else
y = d;
end
endmodule
module test_const(a, y);
input [3:0] a;
output reg [28:0] y;
always @*
case (a)
4'b0000: y = 0;
4'b0001: y = 11;
4'b0010: y = 222;
4'b0011: y = 3456;
4'b0100: y = 'b10010010;
4'b0101: y = 'h123abc;
4'b0110: y = 'o1234567;
4'b0111: y = 'd3456789;
4'b1000: y = 16'b10010010;
4'b1001: y = 16'h123abc;
4'b1010: y = 16'o1234567;
4'b1011: y = 16'd3456789;
4'b1100: y = { "foo", "bar" };
4'b1101: y = "foobarfoobarfoobar";
4'b1110: y = 16'h1;
4'b1111: y = a;
default: y = 'bx;
endcase
endmodule
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