Predefined Operators:

The above is the list of predefined operators in VHDL. The logical and relational operators are similar to those found in other languages. The addition operators are also familiar except for the concatenation operator which will be discussed in the next slide. The multiplication operators are also typical (e.g. the mod operator returns the modulus of the division and the rem operator returns the remainder). Finally, the miscellaneous operators provide some useful frequently used functions.