SystemVerilog constraint defined with the keyword unique is called as a unique constraint. On randomization, unique values to set of variables or unique elements to an array can be generated by using unique constraints.

Sep 19, 2015 · The unique keyword tells all software tools that support SystemVerilog, including those for simulation, synthesis, lint-checking, formal verification, that each selection item in a series of decisions is unique from any other selection item in that series, and that all legal cases have been listed.

All case statements can be qualified by unique or unique0 keywords to perform violation checks like we saw in if-else-if construct. unique and unique0 ensure that there is no overlapping case items and hence can be evaluated in parallel.

As the name suggests, a unique constraint is useful to generate unique values for variables and elements in an array (Fixed array, associative array, dynamic array, and queue) Syntax: …

Mar 16, 2019 · There are three ways that I can think of. The first one is to use the uniqueness constraints in SystemVerilog syntax, the other two ways are to use array iterators to do the trick. This is the most straightforward way to do it.

The conditional if else statement is used to make a decision about whether a statement is executed. Click here to refresh if else if in Verilog ! SystemVerilog introduced the following if else constructs for violation checks. unique-if unique0-if priority-if …

Aug 26, 2021 · Hi All, I am trying to generate the array with unique values. My requirement is if i run the code for multiple times it needs to generate the unique values multiple times. I have code for generating the unique values b…

The SystemVerilog-2009 Standard[6] has taken important steps to close the shortfalls in both features and error detection. This paper describes existing priority and unique semantics and then introduces the new unique0 keyword semantics and the …

Jun 5, 2021 · The new unique constraint (new feature of 1800-2012) lets you use one statement to constraint a set of variables or array elements to have unique values. In the following example when randomized, this class generates a set of ten unique values from 0 to 15.

In SystemVerilog below is one of the method, This can be achieved using Unique constraint. Unique constraint can be used to generate unique values across the variables, generate unique elements in an array (Fixed Size Array, Dynamic Array, Associative array and Queue) .