add_drc_checks - 2021.2 English

Vivado Design Suite Tcl Command Reference Guide (UG835)

Document ID
Release Date
2021.2 English

Add DRC rule check objects to a rule deck


add_drc_checks [‑of_objects <args>] [‑regexp] [‑nocase] [‑filter <arg>]
    ‑ruledeck <arg> [‑quiet] [‑verbose] [<patterns>]




Name Description
[-of_objects] Get 'rule_check' objects of these types: 'drc_ruledeck'.
[-regexp] Patterns are full regular expressions
[-nocase] Perform case-insensitive matching. (valid only when -regexp specified)
[-filter] Filter list with expression
-ruledeck DRC rule deck to modify
[-quiet] Ignore command errors
[-verbose] Suspend message limits during command execution
[<patterns>] Match the 'rule_check' objects against patterns. Default: *


DRC, Object


Add design rule checks to the specified drc_ruledeck object.

A rule deck is a collection of design rule checks grouped for convenience, to be run with the report_drc command at different stages of the Xilinx design flow, such as during I/O planning or placement. The tool comes with a set of factory defined rule decks, but you can also create new user-defined rule decks with the create_drc_ruledeck command.

Use the get_drc_ruledecks command to return a list of the currently defined rule decks available for use in the report_drc command.

You can add standard factory defined rule checks to the rule deck, or add user-defined rule checks that were created using the create_drc_check command. Use the get_drc_checks command to get a list of checks that can be added to a rule deck.

Checks can also be removed from a rule deck using the remove_drc_checks command.
Note: To temporarily disable a specific DRC rule, use the set_property command to set the IS_ENABLED property for the rule to false. This will disable the rule from being run in report_drc, without having to remove the rule from the rule deck. Use reset_drc_check to restore the rule to its default setting.

This command returns the list of design rule checks that were added to the rule deck.


-of_objects <arg> - (Optional) Add the rule checks of the specified drc_ruledeck object to the specified rule deck. This has the effect of copying the rules from one rule deck into another.
Note: The -of_objects option requires objects to be specified using the get_* commands, such as get_cells or get_pins, rather than specifying objects by name. In addition, -of_objects cannot be used with a search <pattern>.
-regexp - (Optional) Specifies that the search <patterns> are written as regular expressions. Both search <patterns> and -filter expressions must be written as regular expressions when this argument is used. Xilinx regular expression Tcl commands are always anchored to the start of the search string. You can add ".*" to the beginning or end of a search string to widen the search to include a substring. See for help with regular expression syntax.
Note: The Tcl built-in command regexp is not anchored, and works as a standard Tcl command. For more information refer to

-nocase - (Optional) Perform case-insensitive matching when a pattern has been specified. This argument applies to the use of -regexp only.

-filter <args> - (Optional) Filter the results list with the specified expression. The -filter argument filters the list of objects returned by the search pattern, based on specified property values. You can find the properties on an object with the report_property or list_property commands.

The filter search pattern should be quoted to avoid having to escape special characters. String matching is case-sensitive and is always anchored to the start and to the end of the search string. The wildcard “*” character can be used at the beginning or at the end of a search string to widen the search to include a substring of the property value.
Note: The filter returns an object if a specified property exists on the object, and the specified pattern matches the property value on the object. In the case of the "*" wildcard character, this will match a property with a defined value of "".
For string comparison, the specific operators that can be used in filter expressions are "equal" (==), "not-equal" (!=), "match" (=~), and "not-match" (!~). Numeric comparison operators <, >, <=, and >= can also be used. Multiple filter expressions can be joined by AND and OR (&& and ||). The following gets input pins that do NOT contain the “RESET” substring within their name:
get_pins * -filter {DIRECTION == IN && NAME !~ "*RESET*"}
Boolean (bool) type properties can be directly evaluated in filter expressions as true or not true:

-ruledeck <arg> - (Required) The name of the rule deck to add the specified design rule checks to.

-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
Note: Any errors encountered on the command-line, while launching the command, will be returned. Only errors occurring inside the command will be trapped.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
Note: Message limits can be defined with the set_msg_config command.
<patterns> - (Optional) Add the design rule checks that match the specified patterns to the rule deck. The default pattern is the wildcard '*' which adds all rule checks to the specified rule deck. More than one pattern can be specified to find multiple rule checks based on different search criteria.
Note: You must enclose multiple search patterns in braces, {}, or quotes, "", to present the list as a single element.


The following example adds the rule checks matching the specified search pattern to the project_rules rule deck:
add_drc_checks -ruledeck project_rules {*DCI* *BUF*}
The following example creates a new rule deck called placer+, copies all of the rule checks from the placer_checks rule deck into the placer+ rule deck, then adds some additional checks:
create_drc_ruledeck placer+
add_drc_checks -of_objects [get_drc_ruledecks placer_checks] \
   -ruledeck placer+
add_drc_checks -ruledeck placer+ *IO*
The following example adds only the rule checks with a severity of Warning to the rule deck:
add_drc_checks -filter {SEVERITY == Warning} -ruledeck warn_only