eldo_user

Eldo Premier
Automatic Activation of Eldo Premier
The more devices the netlist contains, the more likely it is that Eldo Premier is selected.
If the netlist contains more than 3 million devices, then Eldo Premier is always selected;
if the netlist contains less than 1500 devices, then Eldo Classic is always selected.
• Highly connected netlist
For a given number of nodes, the more devices the netlist contains, the more likely it is
that Eldo Premier is selected.
• High proportion of transistors
If the netlist contains a high proportion of transistors then Eldo Premier is more likely to
be selected.
• Well-balanced hierarchy
Eldo Premier is more likely to be selected if the netlist is hierarchical than if the netlist is
flat.
• Transient analysis (.TRAN) in the netlist
If the netlist does not contain a .TRAN command, then Eldo Premier is less likely to be
selected.
• .OPTION PREMIER_MODE in the netlist
If the netlist contains option PREMIER_MODE with a value greater than or equal to 1,
then Eldo Premier is more likely to be selected.
Tip
See also “Eldo Premier Options” in the Eldo Reference Manual.
Limitations
• Eldo is able to detect when the netlist contains commands or devices not supported by
Eldo Premier and in such a case will never activate Eldo Premier, except for the
following limitation:
o
Eldo Premier does not support controlled devices controlled by anything other than
net voltage, voltage source current, or current through resistance. Eldo is not able to
detect this case and may activate Eldo Premier although this will cause Eldo Premier
to stop with an error. The workaround is to run the netlist with .OPTION CLASSIC
inside the netlist or use the -classic command line argument when invoking Eldo.
• Eldo does not check if the extra license needed to run Eldo Premier is available before
activating Eldo Premier. If the license is not available once Eldo Premier has been
activated, then Eldo Premier will stop with an error (except if the -queue flag is
specified). If you do not have enough licenses to run Eldo Premier, then do not attempt
to use .OPTION AUTO or the -auto command line argument.
Eldo® User's Manual, 15.3 65