AHDL Function Prototype (port name and order also apply to Verilog HDL)
The following AHDL function prototype is located in the AHDL Include File (.inc) Definitionaltsquare.inc in the <Intel® Quartus® Prime installation directory>\libraries\megafunctions directory.
FUNCTION altsquare ( aclr, clock, data[DATA_WIDTH-1..0], ena ) WITH ( DATA_WIDTH, PIPELINE, REPRESENTATION, RESULT_WIDTH ) RETURNS ( result[RESULT_WIDTH-1..0] );