I am looking at the code in the following website.
In their code, they claims something like
input signed [7:-12] c_in;
I am wondering what does the negative mean in here?
module scaled_square ( output reg signed [7:-12] y, input signed [7:-12] c_in, x, input [11:0] i, input start, input clk, reset ); wire c_ram_wr; reg c_ram_en, x_ce, mult_sel, y_ce; reg signed [7:-12] c_out, x_out; reg signed [7:-12] c_RAM [0:4095]; reg signed [7:-12] operand1, operand2; parameter [1:0] step1 = 2'b00, step2 = 2'b01, step3 = 2'b10; reg [1:0] current_state, next_state; assign c_ram_wr = 1'b0;