get_drc_checks - 2020.2 English

Get a list of DRC rule check objects

Syntax

get_drc_checks [‑of_objects <args>] [‑regexp] [‑nocase] [‑filter <arg>]
    [‑abbrev <arg>] [‑ruledecks <args>] [‑quiet] [‑verbose] [<patterns>]

Returns

list of DRC rule_check objects

Usage

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
`[-abbrev]`	Get the largest ID for this abbrev
`[-ruledecks]`	Containers of Report DRC rule checks Default: default
`[-quiet]`	Ignore command errors
`[-verbose]`	Suspend message limits during command execution
`[<patterns>]`	Match the 'rule_check' objects against patterns. Default: *

Description

Gets a list of the currently defined DRC checks. This list includes both factory defined design rule checks, and user-defined checks created by the create_drc_check command.

Note: To improve memory and performance, the get_* commands return a container list of a single type of objects (e.g. cells, nets, pins, or ports). You can add new objects to the list (using lappend for instance), but you can only add the same type of object that is currently in the list. Adding a different type of object, or string, to the list is not permitted and will result in a Tcl error.

Arguments

-of_objects <args> - (Optional) Get the design rule checks associated with a rule deck object. The ruledeck object must be specified by the get_drc_ruledecks command.

Note: -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 http://perldoc.perl.org/perlre.html 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 http://www.tcl.tk/man/tcl8.5/TclCmd/regexp.htm.

-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 rule checks returned by get_drc_checks based on property values on the rule checks. 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 that may be found in net, pin, or cell names, or other properties. 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:

-filter {IS_PRIMITIVE && !IS_LOC_FIXED}

-abbrev <arg> - (Optional) Get the design rule checks associated with the specified rule name or abbreviation.

-ruledecks <args> - (Optional) Get the design rule checks associated with the specified rule decks.

-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) Match design rule checks against the specified patterns. The default pattern is the wildcard '*' which gets all rule checks. 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.

Examples

The following command gets a list of all AVAL design rule checks:

get_drc_checks AVAL*

The following example gets the checks associated with the specified rule deck:

get_drc_checks -of_objects [get_drc_ruledecks placer_checks]