Not sure about aviation computers, but for car engines it’s typically a set of tables with something like air pressure on the y axis and engine rpm on the x axi

Not sure about aviation computers, but for car engines it’s typically a set of tables with something like air pressure on the y axis and engine rpm on the x axis where each cell has a fuel value. Then you have other tables for other variables such as spark ignition advance, or anything else that can be changed electronically on the specific engine. Tables are typically used because they make the software quite simple/fast. And the values in the table can be tweaked (either from simulation or by experiments on the real engine) that separates the configuration from the code.