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iteration_calc.sv
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iteration_calc.sv
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module iteration_calc(
input logic CLK, RESET,
input logic start,
input logic signed [31:0] z_real,
input logic signed [31:0] z_imag,
input logic signed [31:0] real_var,
input logic signed [31:0] imag_var,
output logic [7:0] intensity,
output logic done
);
logic signed [63:0] z1, z2, multiplicand;
logic signed [31:0] z_real_2, z_imag_2, z_real_abs, z_image_abs, ln_0y, increaser;
int ln_0x, n;
// enum logic [7:0] {N1, N2, N3, N4, N5, N6, N7, N8, N9, N10,
// N11, N12, N13, N14, N15, N16, N17, N18, N19, N20
// N21, N22, N23, N24, N25, N26, N27, N28, N29, N30
// N31, N32, N33, N34, N35, N36, N37, N38, N39, N40
// N41, N42, N43, N44, N45, N46, N47, N48, N49, N50
// N51, N52, N53, N54, N55, N56, N57, N58, N59, N60
// N61, N62, N63, N64, N65, N66, N67, N68, N69, N70
// N71, N72, N73, N74, N75, N76, N77, N78, N79, N80
// N81, N82, N83, N84, N85, N86, N87, N88, N89, N90
// N91, N92, N93, N94, N95, N96, N97, N98, N99, N100}, State, Next_State;
logic [7:0] curr_state, next_state;
parameter [31:0] ln_1y_fractional = 32'b0000000000000000_0010110110011000;
naturallog ln_0(.x (ln_0x), .y (ln_0y));
absolute_val abs_0(.in_val (z_real_2), .out_val (z_real_abs));
absolute_val abs_1(.in_val (z_imag_2), .out_val (z_imag_abs));
initial
begin
curr_state <= 8'd101;
end
always_ff @ (posedge CLK)
begin
if (RESET)
curr_state <= 8'd101;
else
curr_state <= next_state;
end
always_comb
begin
if (start == 1 && curr_state == 101)
begin
done = 0;
next_state = 8'd0;
n = 0;
end
else if (curr_state == 100)
begin
done = 1;
next_state = 101;
n = curr_state;
end
else if (curr_state == 101)
begin
done = 1;
next_state = 101;
n = curr_state;
end
else
begin
done = 0;
next_state = curr_state + 1;
n = curr_state;
end
end
always_comb
begin
if ((curr_state != 100) && (curr_state != 101))
begin
z1 = ((z_real * z_real) - (z_imag * z_imag));
z2 = (2 * z_real * z_imag);
z_real_2 = z1[47:16] + real_var;
z_imag_2 = z2[47:16] + imag_var;
if ((z_real_abs + z_imag_abs) > 5)
begin
ln_0x = n + 1;
multiplicand = (ln_0y - 32'b0000000000000001_0000000000000000) * (ln_1y_fractional);
increaser = (multiplicand[47:16] + multiplicand[47:16]);
intensity = (increaser[15:8]);
if (increaser < 0)
begin
intensity = 8'b00000000;
end
else if (increaser[16] == 1'b1)
begin
intensity = 8'b11111111;
end
end
else
begin
intensity = 8'b00000000;
ln_0x = 0;
multiplicand = 64'b00000000000000000000000000000000_00000000000000000000000000000000;
increaser = 32'b0000000000000000_0000000000000000;
end
end
else
begin
z1 = 64'b00000000000000000000000000000000_00000000000000000000000000000000;
z2 = 64'b00000000000000000000000000000000_00000000000000000000000000000000;
z_real_2 = 32'b0000000000000000_0000000000000000;
z_imag_2 = 32'b0000000000000000_0000000000000000;
intensity = 8'b00000000;
ln_0x = 0;
multiplicand = 64'b00000000000000000000000000000000_00000000000000000000000000000000;
increaser = 32'b0000000000000000_0000000000000000;
end
end
endmodule
// for (int n = 0; n < 100; n++)
// begin
// z1 = ((z_real * z_real) - (z_imag * z_imag));
// z2 = (2 * z_real * z_imag);
// z_real_2 = z1[47:16] + real_var;
// z_imag_2 = z2[47:16] + imag_var;
// if ((z_real_abs + z_imag_abs) > 5)
// begin
// ln_0x = n + 1;
// multiplicand = (ln_0y - 32'b0000000000000001_0000000000000000) * (ln_1y_fractional);
// increaser = (multiplicand[47:16] + multiplicand[47:16]);
// intensity = (increaser[15:8]);
// if (increaser < 0)
// begin
// intensity = 8'b00000000;
// end
// else if (increaser[16] == 1'b1)
// begin
// intensity = 8'b11111111;
// end
// break;
// end
// else
// begin
// intensity = 8'b00000000;
// end
// end