eldo_user

Eldo Control Language
Eldo Control Language Limitations
The .MPRUN command is not supported at the task level but at the testbench level. ECL
sequential loop statements are not supported; the .MPRUN command has no effect on
the ECL statements: for, step, and while. For example, it is not possible to distribute
each simulation executed inside a sequential “for” loop. For a given simulation (run
from an ECL task), if the netlist to simulate contains a .MPRUN command and a .MC
command for example, then the Monte Carlo runs of this simulation will be distributed
as usual. See the “.MPRUN with Monte Carlo Analysis Example” on page 1133.
Simulations executed inside ECL parallel loop statements can be distributed using the
.ELDO_CL_MPRUN command.
• The .AGE and .DEX commands are supported inside testbenches even if they are
directly instantiated in the netlist.
• The Eldo Control Language is supported by Eldo Premier, with limitations. The
functionality described in “Simulation Dynamic Control” on page 1014 is not supported.
• Eldo Interactive mode is not compatible with the Eldo Control Language: it does not
support netlists containing tasks. Netlists containing only testbench instantiations,
without any tasks can however be run using the Eldo Interactive mode.
• Eldo Control Language may sometimes generate large .wdb files; especially when a task
runs a simulation creating many waveforms and if all these waveform results are saved
into task local variables, the main .wdb file can be much larger than the temporary .wdb
file generated during the simulation. One of the following options can be used to solve
this possible issue:
o
o
.option KEEP_ELDO_CL_TEMP_WAVES=0
For more details on this option, see the “wdb File” section in “Simulation” on
page 1114. This is the preferred solution, but the disadvantage is that waveforms that
need to be saved to be visualized have to be saved explicitly using the “Functions
Operating on wdb Files” described in “Library of Functions for Tasks” on page 854.
.option USE_ELDO_CL_SAFE_WAVE_CP=0
This option deactivation has two major disadvantages:
• Possible impact on the execution speed of Eldo Control Language tasks: the
execution of a task running many simulations generating waveforms will be
longer (if these waveform results are saved into task local variables for each
simulation).
• In some cases the Eldo Control Language won’t be able to generate a compound
waveform simulation result (FAILED TO GET WAVE error). This will happen,
for example, with AC simulations when trying to generate a vdb or vp
waveform, for example:
.plot ac w_db=vdb(out) w_p=vp(out)
Workaround: replace the .PLOT command with a v complex waveform plot:
Eldo® User's Manual, 15.3 807