Virtuoso XL Layout Editor User Guide

Virtuoso XL .do File Commands

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Virtuoso XL .do File Commands

When Virtuoso XL wire editing is enabled, the following commands can be written in a .do

file and executed through Virtuoso XL.

■circuit

■define/forget

■do

■limit

■rule

■set

For information about loading do files, refer to“Using .do Files” on page 416.

Rule Hierarchy

Based on the available commands, use an object keyword with each command to determine at which level of rule precedence the routing rules are applied. The following table describes the routing rule hierarchy from highest to lowest.

Rule Hierarchy

region class_class

region net

region class

region

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class_class layer

class_class

Virtuoso XL Layout Editor User Guide

Virtuoso XL .do File Commands

Rule Hierarchy

group layer group

net layer net

group_set layer group_set class layer class

layer ic

For example,

rule net (inter_layer_clear 3 (layer_pair poly diffusion))

would overwrite the following rule,

rule ic (inter_layer_clear 3 (layer_pair poly diffusion))

For more information about rules precedence, refer to “Understanding the routinguler hierarchy” in the IC Shape-Based Placer/Router Documentation.