Altera Quartus II Scripting - Manual (Page 405)

Chapter 3: Tcl Packages & Commands 3–275
rtl
© July 2013 Altera Corporation Quartus II Scripting Reference Manual
get_rtl_fanins
Usage
get_rtl_fanins [-inverting_paths] [-non_inverting_paths] <filter>
Options
-inverting_paths: Only follow inverting combinational paths
-non_inverting_paths: Only follow non-inverting combinational paths
<filter>: Valid starting nodes (string patterns are matched using Tcl string matching
or collection)
Description
Returns a collection of fanin pins starting from the <filter> in the design.
When the -non_inverting_paths option is used, get_fanins does not follow any paths that include an odd
number of inverters. Similarly, when the -inverting_paths option is used, get_fanins does not follow any
paths that include an even number of inverters. Both the -non_inverting_paths and -inverting_paths
options are mutually exclusive.
The filter for the collection is a Tcl list of wildcards, and must follow standard Tcl substitution rules.
Example
set fanins [get_rtl_fanins $item]
foreach_in_collection fanin $fanin {
lappend fanin_list [get_rtl_pin_info $fanin -name]
}
get_rtl_fanins inst1 -non_inverting_paths