3.1.28.6. get_fanins (::quartus::sdc

Intel® Quartus® Prime Pro Edition User Guide: Scripting

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ID 683432

Date 12/13/2021

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3.1.28.6. get_fanins (::quartus::sdc_ext)

The following table displays information for the get_fanins Tcl command:

Tcl Package and Version	Belongs to ::quartus::sdc_ext
Syntax	`get_fanins [-h \| -help] [-long_help]` `[-asynch]` `[-clock]` `[-inverting_paths]` `[-no_logic]` `[-non_inverting_paths]` `[-stop_at_clocks]` `[-synch]` `[-through` <names> `]` <filter>
Arguments	`-h \| -help`	Short help
	`-long_help`	Long help with examples and possible return values
	`-asynch`	Traverse through asynch edges
	`-clock`	Traverse through clock edges
	`-inverting_paths`	Only follow inverting combinational paths
	`-no_logic`	Do not follow combinational paths
	`-non_inverting_paths`	Only follow non-inverting combinational paths
	`-stop_at_clocks`	Return clock targets as fanin/fanouts rather than traversing through them
	`-synch`	Traverse through synch edges
	`-through` <names>	Valid through nodes (string patterns are matched using Tcl string matching)
	<filter>	Valid starting nodes (string patterns are matched using Tcl string matching or collection)
Description	Returns a collection of fanin ports, registers (and optionally clock targets) reachable from the <filter> in the design. When you supply the -no_logic option, get_fanins ignores paths that pass through combinational logic elements other than buffers and inverters. NOTE: the -no_logic option does not consider logic absorbed into the cells of the <filter> nor the cells of fanin registers, ports or clock targets. When you use -synch, -asynch, or -clock options, get_fanins traverses the netlist through corresponding edges. You can specify more than one of these options. If you do not specify any of these three options, the command does not ignore any paths. When the -non_inverting_paths option is used, no_logic does not follow any paths that includes odd number of inverters. Similarly, when the -inverting_paths option is used, no_logic does not follow any paths that includes even number of inverters. Both the -non_inverting_paths and -inverting_paths options require the -no_logic option and are mutually exclusive. When the -through option is used, only the fanins that can be reached by going through those nodes are returned. When -stop_at_clocks is used, combinational clock targets may be returned (in addition to clock or non-clock registers and ports), and registers or ports that can only be reached by traversing through a clock target

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Intel® Quartus® Prime Pro Edition User Guide: Scripting

3.1.28.6. get_fanins (::quartus::sdc_ext)