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// Based on cyclonev_atoms.v from Quartus II 14.0.0 Build 200 06/17/2014
// ==========================================================================================
module cyclonev_lcell_comb (
dataa, datab, datac, datad, datae, dataf, datag, cin, sharein,
combout, sumout, cout, shareout
);
input dataa, datab, datac, datad, datae, dataf, datag, cin, sharein;
output reg combout, sumout, cout, shareout;
parameter lut_mask = 64'hFFFFFFFFFFFFFFFF;
parameter shared_arith = "off";
parameter extended_lut = "off";
parameter dont_touch = "off";
parameter lpm_type = "cyclonev_lcell_comb";
localparam ishared_arith = shared_arith == "on";
localparam iextended_lut = extended_lut == "on";
localparam [15:0] f0_mask = lut_mask[15:0];
localparam [15:0] f1_mask = lut_mask[31:16];
localparam [15:0] f2_mask = lut_mask[47:32];
localparam [15:0] f3_mask = lut_mask[63:48];
reg f0_out, f1_out, f2_out, f3_out;
reg g0_out, g1_out;
reg f2_input3, f2_f;
reg adder_input2;
// 4-input LUT function
function lut4;
input [15:0] mask;
input dataa;
input datab;
input datac;
input 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
// 5-input LUT function
function lut5;
input [31:0] mask;
input dataa;
input datab;
input datac;
input datad;
input datae;
reg e0_lut;
reg e1_lut;
reg [15:0] e0_mask;
reg [31:16] e1_mask;
begin
e0_mask = mask[15:0];
e1_mask = mask[31:16];
begin
e0_lut = lut4(e0_mask, dataa, datab, datac, datad);
e1_lut = lut4(e1_mask, dataa, datab, datac, datad);
if (datae === 1'bX) // X propogation
begin
if (e0_lut == e1_lut)
begin
lut5 = e0_lut;
end
else
begin
lut5 = 1'bX;
end
end
else
begin
lut5 = (datae == 1'b1) ? e1_lut : e0_lut;
end
end
end
endfunction
// 6-input LUT function
function lut6;
input [63:0] mask;
input dataa;
input datab;
input datac;
input datad;
input datae;
input dataf;
reg f0_lut;
reg f1_lut;
reg [31:0] f0_mask;
reg [63:32] f1_mask ;
begin
f0_mask = mask[31:0];
f1_mask = mask[63:32];
begin
lut6 = mask[{dataf, datae, datad, datac, datab, dataa}];
if (lut6 === 1'bX)
begin
f0_lut = lut5(f0_mask, dataa, datab, datac, datad, datae);
f1_lut = lut5(f1_mask, dataa, datab, datac, datad, datae);
if (dataf === 1'bX) // X propogation
begin
if (f0_lut == f1_lut)
begin
lut6 = f0_lut;
end
else
begin
lut6 = 1'bX;
end
end
else
begin
lut6 = (dataf == 1'b1) ? f1_lut : f0_lut;
end
end
end
end
endfunction
always @(datag or dataf or datae or datad or datac or
datab or dataa or cin or sharein)
begin
// check for extended LUT mode
if (iextended_lut == 1)
f2_input3 = datag;
else
f2_input3 = datac;
f0_out = lut4(f0_mask, dataa, datab, datac, datad);
f1_out = lut4(f1_mask, dataa, datab, f2_input3, datad);
f2_out = lut4(f2_mask, dataa, datab, datac, datad);
f3_out = lut4(f3_mask, dataa, datab, f2_input3, datad);
// combout is the 6-input LUT
if (iextended_lut == 1)
begin
if (datae == 1'b0)
begin
g0_out = f0_out;
g1_out = f2_out;
end
else if (datae == 1'b1)
begin
g0_out = f1_out;
g1_out = f3_out;
end
else
begin
if (f0_out == f1_out)
g0_out = f0_out;
else
g0_out = 1'bX;
if (f2_out == f3_out)
g1_out = f2_out;
else
g1_out = 1'bX;
end
if (dataf == 1'b0)
combout = g0_out;
else if ((dataf == 1'b1) || (g0_out == g1_out))
combout = g1_out;
else
combout = 1'bX;
end
else
combout = lut6(lut_mask, dataa, datab, datac, datad, datae, dataf);
// check for shareed arithmetic mode
if (ishared_arith == 1)
adder_input2 = sharein;
else
begin
f2_f = lut4(f2_mask, dataa, datab, datac, dataf);
adder_input2 = !f2_f;
end
// sumout & cout
sumout = cin ^ f0_out ^ adder_input2;
cout = (cin & f0_out) | (cin & adder_input2) | (f0_out & adder_input2);
shareout = f2_out;
end
endmodule
// ==========================================================================================
module cyclonev_io_ibuf (i, ibar, dynamicterminationcontrol, o);
parameter differential_mode = 0;
parameter bus_hold = 0;
parameter simulate_z_as = 0;
parameter lpm_type = 0;
input i;
input ibar;
input dynamicterminationcontrol;
output o;
assign o = i;
endmodule
// ==========================================================================================
module cyclonev_io_obuf (i, oe, dynamicterminationcontrol, seriesterminationcontrol, parallelterminationcontrol, devoe, o, obar);
parameter open_drain_output = 0;
parameter bus_hold = 0;
parameter shift_series_termination_control = 0;
parameter sim_dynamic_termination_control_is_connected = 0;
parameter lpm_type = 0;
input i;
input oe;
input devoe;
input dynamicterminationcontrol;
input [15:0] seriesterminationcontrol;
input [15:0] parallelterminationcontrol;
output o;
output obar;
assign o = i, obar = ~i;
endmodule
// ==========================================================================================
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