| -root | path/designer/module_name | The path to the root module located under the designer directory
of the Libero project. |
| [-n ] | numPasses | Sets the number of passes to run. The default number of passes is
5. |
| [-starting_seed_index ] | numIndex | Indicates the specific index into the array of random seeds which
is to be the starting point for the passes. Value may range from 1
to 100. If not specified, the default behavior is to continue from
the last seed index that was used. |
| [-compare_criteria ] | value |
| Value | Description |
|---|
| frequency | Use clock frequency as criteria for
comparing the results between passes. This option
can be used in conjunction with the -c option
(described below). | | violations | Use timing violations as criteria for
comparing the results between passes. This option
can be used in conjunction with the -analysis,
-slack_criteria and - stop_on_success options
(described below). | | power | Use total power as criteria for comparing
the results between passes, where lowest total
power is the goal. |
|
| [-c ] | clockName | Applies only when the clock frequency comparison criteria is
used. Specifies the particular clock that is to be examined. If no
clock is specified, then the slowest clock frequency in the design
in a given pass is used. The clock name should match with one of the
Clock Domains in the Summary section of the Timing report. |
| [-analysis ] | value | Applies only when the timing violations comparison criteria is
used. Specifies the type of timing violations (the slack) to
examine. The following table shows the acceptable values for this argument:
| Value | Description |
|---|
| max | Examines timing violations (slack) obtained
from maximum delay analysis. This is the
default. | | min | Examines timing violations (slack) obtained
from minimum delay analysis. |
|
| [-slack_criteria ] | value | Applies only when the timing violations comparison criteria is
used. Specifies how to evaluate the timing violations (slack). The
type of timing violations (slack) is determined by the -analysis
option. The following table shows the acceptable values for this argument:
| Value | Description |
|---|
| worst | Sets the timing violations criteria to
Worst slack. For each pass obtains the most amount
of negative slack (or least amount of positive
slack if all constraints are met) from the timing
violations report. The largest value out of all
passes will determine the best pass. This is the
default. | | tns | Sets the timing violations criteria to
Total Negative Slack (tns). For each pass it
obtains the sum of negative slack values from the
first 100 paths from the timing violations report.
The largest value out of all passes determines the
best pass. If no negative slacks exist for a pass,
then the worst slack is used to evaluate that
pass. |
|
| [-stop_on_success] | | Applies only when the timing violations comparison criteria is
used. The type of timing violations (slack) is determined by the
-analysis option. Stops running the remaining
passes if all timing constraints have been met (when there are no
negative slacks reported in the timing violations report). |
| [-timing_driven|-standard] | | Sets layout mode to timing driven or standard (non-timing
driven). The default is -timing_driven or the mode
used in the previous layout command. |
| [-power_driven ] | value | Enables or disables power-driven layout. The default is off or
the mode used in the previous layout command. The following table
shows the acceptable values for this argument:
| Value | Description |
|---|
| off | Does not run power-driven layout. | | on | Enables power-driven layout. |
|
| [-placer_high_effort ] | value | Sets placer effort level. The default is off or the mode used in
the previous layout command. The following table shows the
acceptable values for this argument:
| Value | Description |
|---|
| off | Runs layout in regular effort. | | on | Activates high effort layout mode. |
|
