VHDL Functions and Procedures - 2022.1 English

Vivado Design Suite User Guide: Synthesis (UG901)

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2022.1 English

Use VHDL functions and procedures for blocks that are used multiple times in a design. The content is similar to combinatorial process content

Declare functions and procedures in:

The declarative part of an entity

An architecture

A package

A function or procedure consists of a declarative part and a body.

The declarative part specifies:

input parameters, which can be unconstrained to a given bound.

output and inout parameters (procedures only)


IMPORTANT:   Resolution functions are not supported except the function defined in the IEEE std_logic_1164 package.