Altera Designing With Low-Level Primitives - Manual (Page 21)

Altera Corporation 1–15
April 2007 Designing with Low-Level Primitives User Guide
Low-Level Primitive Design
Example 1–10 uses the LUT primitive to create LUTs that implement a
4-input AND and a 4-input OR function.
Example 1–10. Using the LUT Primitive
module luts (
input [3:0] in1, in2,
output out1, out2
);
lut_sub inst1 (in1, out1);
defparam inst1.mask = 16'H8000; // AND function
lut_sub inst2 (in2, out2);
defparam inst2.mask = 16'HFFFE; // OR function
endmodule