set_net_critical

Sets the net criticality, which influences place-and-route in favor of performance.

set_net_critical criticality_number [hier_net_name]+

Arguments

criticality_number

Sets the criticality level from 1 to 10, with 1 being the least critical and 10 being the most critical. The default is 5. Criticality numbers are used in timing-driven place and route.

hier_net_name

Specifies the net name, which can be an AFL (Actel Flattened Netlist) net name or a net regular expression using wildcard characters. You must specify at least one net name. You can use the following wildcard characters in names:

Wildcard	What it does
\	Interprets the next character as a non-special character
?	Matches any single character
*	Matches any string
[]	Matches any single character among those listed between brackets (that is, [A-Z] matches any single character in the A-to-Z range)

Note: This command must have at least two parameters.

Supported Families

Axcelerator

Description

Increasing a net’s criticality forces place-and-route to keep instances connected to the specified net as close as possible at the cost of other (less critical) nets.

Exceptions

The net names are AFL names, which means they must be visible in Timer and ChipPlanner.

Examples

This example sets the criticality level to 9 for all addr nets:

set_net_critical 9 addr*