eldo_user

Eldo Control Language
Statement Overview
Related Topics
Flow Control Statements
Step Loops
The step loop implements a loop with different stepping mechanisms, specified with the type
argument. The step loop syntax is taken from the Eldo/SPICE .STEP command syntax.
Note
The type argument is optional, as the type of step loop to execute is actually defined by
another parameter, but it may be used to increase readability.
There are a number of variant forms of this loop:
• Incremental Loop
• Linear Type Loop
• Log Type Loop
• List Type Loop
Incremental Loop
The simplest variant is the incremental loop:
set i = 0
set tmp = 0
step (type=step, param=i, start=i1, stop=i2, step=1)
tmp = tmp + a[i]
endstep
The parameter being swept is specified with param. The start, stop, and step (or the equivalent
incr or decr) define the loop structure. With this type of loop, the step is explicitly stated. The
loop ends with the endstep command.
Linear Type Loop
This variant on the incremental loop uses the lin or linear type. In this case, the progression is
still linear, but the total number of iterations is provided as an integer. The step is computed
from the start, stop, and n parameters. If the n number is negative or null, or if stop is lower than
or equal to start, no iteration is performed, and execution resumes after the endstep command.
836
Eldo® User's Manual, 15.3