eldo_user

Eldo Control Language
Statement Overview
Flow Control Statements
One of the main objectives of the Eldo Control Language is to offer a level of flow control
within the simulation plan, instead of letting the simulator do everything automatically.
To achieve this goal some simple constructs are available:
• if/else/endif Construct
• Step Loops
• While Loops
• For Loops
These constructs are similar to those available in any language for flow control (except for
SPICE, if SPICE can be considered a language). However, the step loop proposed here has
some specificities originating from its similarity with the .STEP command in a simulation
context (see .STEP in the Eldo Reference Manual). The linear, logarithmic, and list-driven
loops are heavily used in existing netlists, and the step loop enables the implementation of these
special kinds of loops easily, in addition to classical for i=1 to n loops.
if/else/endif Construct
The if construct enables the testing of a boolean condition, the triggering a sequence of
statements if the condition is true and, optionally, another sequence if the condition is false.
For example:
if (passfail != 1)
endif
fprint (stdout, "Cannot complete measure_tprop() task for\
cload=%.5g\n", cload[i])
The binary logical operator to test equality or inequality inside a condition are the ones used in
C: == and !=.
The else clause enables the specification of an alternate command sequence:
if (passfail != 1)
fprint (stdout, "Cannot complete measure_tprop() task for\
cload=%.5g\n", cload[i])
else
fprint (stdout, "measure_tprop() task successfully completed.\n")
endif
Eldo® User's Manual, 15.3 835