eldo_user

Eldo Control Language
Task Instantiation
Related Topics
Task Instantiation
Statement Overview
Defining and Running Simulations
Task Instantiation
A task has to be instantiated to be executed. Tasks may be instantiated directly inside the netlist,
or also inside other tasks (in which case they will be executed only if the calling task is
instantiated in the netlist). Tasks can even be recursive.
For an example of this, see Example Three.
To instantiate a task in the netlist file, its name must be prefixed with a '.' and no parenthesis nor
comma must be specified to separate the input arguments, as if it was a user-defined command.
Contrary to testbenches or usual commands, tasks have precedence over everything else. As
soon as some tasks are instantiated in the netlist file, only instantiated tasks will be executed. If
the file also contains a circuit description and usual simulation commands, they will be ignored
(except if an instantiated task performs a simulation with the simulation command; see
“Defining and Running Simulations” on page 841 for more information).
Task Input Parameters
Task input parameters may be given specific values during instantiation. If not, their default
values will be used. See “Examples” on page 818.
Task Output Parameters
If output parameters were defined for a task, their result values (that is to say the values they
have at the end of the execution of the task) can be used by the calling task: they are usually
directly saved inside some local variables of the calling task. Task output parameters are not
passed by reference, but by value: when the task having output parameters is executed, its
output parameters are not references to local variables of the calling task; on the contrary, they
really have a value of their own, which can be accessed at the end of the execution of the task by
the calling task, using the '@' operator.
For example, if the definition of a task is:
.define_task task_name(input_param1=default_value1, ...
+ @output_param1=default_value2, ...)
...
output_param1 = final_value1
.end_define_task
then its instantiation inside another task is:
Eldo® User's Manual, 15.3 817