module rotation_cordic_a( output logic [15:0] xprime, output logic [15:0] yprime,output logic [15:0] zprime,  input logic [15:0] x,input logic [15:0] y,input logic [15:0] z,input logic Clk, Reset, Start, input int i);

logic[15:0] alpha = 16'b0100000000000000;
logic[15:0] alphashift;
logic[15:0] yshift;
logic[15:0] xshift;
logic[15:0] zshift;

 logic[15:0] regx;
 logic[15:0] regy; //<----------Need to store x,y and z here
 logic[15:0] regz;


always_ff@(posedge Clk)

begin

 if(Reset)

begin

  xprime <= 0;
  yprime <= 0;
  zprime <= 0;



end

else if (Start)

begin


if(z[15]==0)

begin
xprime <= regx - (yshift);//check that its arithmetic shift
yprime <= regy + ((xshift)); //check that its arithmetic shift
zprime <= regz - (alphashift); //check that its arithmetic shift
end

if(z[15]==1)

begin
xprime <= regx + (yshift);//check that its arithmetic shift
yprime <= regy - ((xshift)); //check that its arithmetic shift
zprime <= regz + (alphashift); //check that its arithmetic shift //not accurate sice we are not using atan, also already does 2's complement.
end


end //end of if start block

end //end of the always_ff block

always_comb
begin
  //shifting
 alphashift = alpha>>>i;
 yshift = y>>>i;
 xshift = x>>>i;
 zshift = z>>>i;

 //loading the numbers
 regx = x;
 regy = y; //<--------Trying to store x,y and z
 regz = z;

 //Two's complement
if(x[15]==1)
begin
regx[15]=!regx[15];
regx= (!regx)+1;
end

if(y[15]==1)
begin
regy[15]=!regy[15];
regy= (!regy)+1;
end

if(z[15]==1)
begin
regz[15]=!regz[15];
regz= (!regz)+1;
end

end//end of always_comb
endmodule