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// Based on the simulation models from /opt/altera/13.0/quartus/eda/sim_lib/cycloneiii_atoms.v
module cycloneiii_lcell_comb (dataa, datab, datac, datad, cin, combout, cout);
input dataa, datab, datac, datad, cin;
output combout, cout;
parameter lut_mask = 16'hFFFF;
parameter sum_lutc_input = "datac";
parameter dont_touch = "off";
parameter lpm_type = "cycloneiii_lcell_comb";
reg cout_tmp, combout_tmp;
reg [1:0] isum_lutc_input;
// 4-input LUT function
function lut4;
input [15:0] mask;
input dataa, datab, datac, datad;
begin
lut4 = datad ? ( datac ? ( datab ? ( dataa ? mask[15] : mask[14])
: ( dataa ? mask[13] : mask[12]))
: ( datab ? ( dataa ? mask[11] : mask[10])
: ( dataa ? mask[ 9] : mask[ 8])))
: ( datac ? ( datab ? ( dataa ? mask[ 7] : mask[ 6])
: ( dataa ? mask[ 5] : mask[ 4]))
: ( datab ? ( dataa ? mask[ 3] : mask[ 2])
: ( dataa ? mask[ 1] : mask[ 0])));
end
endfunction
initial
if (sum_lutc_input == "datac")
isum_lutc_input = 0;
else if (sum_lutc_input == "cin")
isum_lutc_input = 1;
else
isum_lutc_input = 2;
always @* begin
if (isum_lutc_input == 0) // datac
combout_tmp = lut4(lut_mask, dataa, datab, datac, datad);
else if (isum_lutc_input == 1) // cin
combout_tmp = lut4(lut_mask, dataa, datab, cin, datad);
cout_tmp = lut4(lut_mask, dataa, datab, cin, 'b0);
end
assign combout = combout_tmp;
assign cout = cout_tmp;
endmodule
// ----------------------------------------------------------------------
module cycloneiii_io_ibuf (i, ibar, o);
parameter differential_mode = "false";
parameter bus_hold = "false";
parameter simulate_z_as = "Z";
parameter lpm_type = "cycloneiii_io_ibuf";
input i, ibar;
output o;
assign o = i;
endmodule
// ----------------------------------------------------------------------
module cycloneiii_io_obuf (i, oe, seriesterminationcontrol, devoe, o, obar);
parameter open_drain_output = "false";
parameter bus_hold = "false";
parameter lpm_type = "cycloneiii_io_obuf";
input i, oe, devoe;
input [15:0] seriesterminationcontrol;
output o, obar;
assign o = i;
assign obar = ~i;
endmodule
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