eldo_user

Defining and Running Simulations
Eldo Control Language
Defining and Running Simulations
The simulation command is used to launch a simulation. It is used to assemble the different
pieces of netlist and testbench necessary to create the desired simulation, and to run it. Upon
completion of the simulation, any .EXTRACT, .MEAS, or waveform results having a label are
available for further processing, except if the simulation failed (they can be assigned to task
variables as if they were output arguments of the simulation command).
There are essentially two use models.
• Create a simulation from the local netlist (the netlist from where the task is launched)
and parameterized testbenches.
• Create a simulation from external files and parameterized testbenches.
Each testbench used in the simulation optionally receives parameters, which override the
default values. All parameters are optional; if a parameter is not passed to a testbench, it takes
its default value. If a testbench has no parameter, the action of listing the testbench in the
simulation is similar to including the content of the testbench, as-is, in the assembled netlist.
Simulations launched in this way can only be “child” simulations—in other words, they cannot
include task executions. They must be plain, simple, classical simulations. Specifically, any task
execution statements present in the submitted assembled netlist are ignored.
The simulation command takes three different types of optional argument:
• Arguments related to the launch of the simulation; name and log to specify the name of
the generated netlist and of the log file of the simulation (it may be beneficial to specify
the name of a directory so that all generated temporary files can be easily removed) and
args to set specific Eldo command-line options. To change the default behavior of
passing arguments, see the option in the Arguments section in “Simulation” on
page 1114.
• Testbench instantiations (testbench names but not prefixed with a “.” here).
• Expressions to get return simulation results.
Below shows an example of a simulation command:
Eldo® User's Manual, 15.3 841