check_space

check_space 
{[ -same_net ] [ -diff_net ]}
-lpp1 s_layerlpp 
[ -lpp2 s_layerlpp ] 
[ -region {f_xlo f_ylo f_xhi f_yhi} ] 
[ -top_level_only ] 
[ -annotate [all | none | dim | rect] ] 
[ -clear_annotations ] 
[ -annotation_limit i_count ]
[ -no_sync ] 
[ -check_mode {soft|hard} ]
[ -crossing ] 
[ -process_rules_only ] 
[ -silent | -verbose ] 
[ -trim_corners ] 
[ -threads i_count ] 
[ -space f_userunit ] 
[ -check_trim [ true | false ] ]

Description

Checks shapes for spacing design rule violations. You can specify the area to be checked and choose which shapes to include:

An entire physical layer at a time
A single layer purpose against an entire physical layer
A single layer purpose against a single layer purpose (same or different nets)

By default, Space-based Router and Chip Optimizer creates annotations for violations found and outputs a summary report to the Transcript area. Two types of annotations can be created for each violation:

The dimension annotation shows the measurement of the spacing violation.
The rectangle annotation surrounds the violating spacing area.

The GUI equivalent for this command is Verify—Shapes.

Arguments

`-annotate [all \| none \| dim \| rect]`
	Specifies the annotations to use to mark violations.
	`all`	(Default) Creates rectangle and dimension annotations where violations occur.
	`none`	Prevents annotations from being created.
	`dim`	Creates only dimension annotations to show measurements where violations occur.
	`rect`	Creates only rectangle annotations where violations occur.
	The annotations are added to the `annotation:violation` purpose of the given layer and are listed by layer under Clearance Checks—Same Net Checks or Clearance Checks—Diff Net Checks in the Violations page of the Annotation Browser.
`-annotation_limit` i_count
	Specifies the maximum number of violations to create annotations for. By default, annotations are created for up to 1000 violations. Specify `-annotation_limit -1` to choose no limit.
`-check_mode {soft\|hard}`
	Chooses soft or hard constraint lookup. Default is `hard`.
`-check_trim [ true \| false ]`

	By default and when set to `true`, checks trims. When set to `false`, no trim checking is done.
`-clear_annotations`	Removes existing violation annotations of the same check type and input layers before performing this check. If not specified, existing violations are not cleared.
`-crossing`	Enables same net crossing checks. By default, same net crossings checks are not performed.
`-diff_net`	Checks spacing between different nets.
`-lpp1` s_layerlpp	Checks shapes on this layer (optionally restricted to a specified purpose).
`-lpp2` s_layerlpp	Checks shapes on the layer specified by the `-lpp1` argument against routing shapes on this layer (optionally restricted to a specified purpose).
`-no_sync`	Prevents the OpenAccess database from being updated.
`-process_rules_only`	Uses only foundry constraints (process rules) for checking. By default, the appropriate route spec constraints are used.
`-region` {f_xlo f_ylo f_xhi f_yhi}
	Specifies the boundary points for the area to check. If not specified, the entire design in the active artwork window is checked.
`-same_net`	Checks spacing between shapes on the same net.
`-silent`	Turns off detailed messages during checking.
`-space` f_userunit	Specifies an override value to use as the minimum spacing rule. If this argument is not given, the minimum spacing rule from the technology file is used.
`-threads` i_count	Specifies the number of threads, or processors, to use to process this command. By default, if multi-threading has been enabled, the session threads are used, otherwise, a single processor is used.
`-top_level_only`	Specifies that only top-level shapes be checked against all levels. By default, all shapes are checked. Cell-to-cell placement errors will not be detected if this flag is set.
`-trim_corners`	Specifies that corners be trimmed for checking.
`-verbose`	Outputs a message for each error found during the check.

Value Returned

i_count	Indicates the number of spacing rule violations found for the given criteria.
`-1`	The command did not run due to a syntax error or a missing required argument.

Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023

check_space

Description

Arguments

Value Returned

Related Topics

Virtuoso Space-based Router Command ReferenceProduct Version IC23.1, September 2023

check_space

Description

Arguments

Value Returned

Related Topics

Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023