Honored Contributor
Honored ContributorIf you use integer types, declare each object with a specific range if possible. Integer types require 32-bits in Quartus II. If you simply add two integer objects, you'll get a 32-bit adder initially, which Quartus II may or may not be able to optimize fully. For sure, it won't always find the solution you can get by simply defining the appropriate dynamic range for each object. It will certainly improve the compile-time/memory use in Quartus II!
I generally use signed/unsigned from ieee.numeric_std, using integer types only for very limited purposes, such as array indices (it's a pain to convert from signed/unsigned to integer all the time :)
