User guide

2-27

Modeling Your Design

Obtaining Scope Information

VCS has custom format specifications (IEEE Std 1364-2001 does not

define these) for displaying scope information. It also has system

functions for returning information about the current scope.

Scope Format Specifications

The IEEE Std 1364-2001 describes the %m format specification for

system tasks for displaying information such as $write and

$display. The %m specification tells VCS to display the hierarchical

name of the module instance that contains the system task. If the

system task is in a scope lower than a module instance, it tells VCS

to do the following:

• In named begin-end or fork-join blocks, it adds the block name to

the hierarchical name.

• In user-defined tasks or functions, it considers the hierarchical

name of the task declaration or function definition as the

hierarchical name of the module instance.

VCS has the following additional format specifications for displaying

scope information:

Specifies the same as %m with the following difference: when in a

user-defined task or function, the hierarchical name is the

hierarchical name of the instance or named block containing the

task enabling statement or function call, not the hierarchical name

of the task or function declaration.

If the task enabling statement is in another user-defined task, the

hierarchical name is the hierarchical name of the instance or