21.8.65 set_options

Description

Sets options for timing analysis which can be changed in the SmartTime Options dialog box in the SmartTime GUI. All of the options from SmartTime are passed on to place-and-route tool, and some affect timing-driven place-and-route.

set_options \
[-max_opcond value ] \
[-min_opcond value ] \
[-interclockdomain_analysis value ] \
[-use_bibuf_loopbacks value ] \
[-enable_recovery_removal_checks value ] \
[-break_at_async value ] \
[-filter_when_slack_below value ] \
[-filter_when_slack_above value ] \
[-remove_slack_filters] \
[-limit_max_paths value ] \
[-expand_clock_network value ] \
[-expand_parallel_paths value ] \
[-analysis_scenario value ] \
[-tdpr_scenario value ] \
[-reset]

Arguments


Parameter	Type	Description
`max_opcond`	string	Sets the operating condition to use for Maximum Delay Analysis. The acceptable values for `max_opcond` for PolarFire can be the following: `slow_lv_ht` - use `slow_lv_ht` conditions for maximum delay analysis `slow_lv_lt` - use `slow_lv_lt` conditions for maximum delay analysis `fast_hv_lt` - use `fast_hv_lt` conditions for maximum delay analysis Default is `slow_lv_lt`. `max_opcond` for SmartFusion® 2, IGLOO® 2, and RTG4™ can be as following: `worst` - use worst case conditions for maximum delay analysis `typical` - use typical conditions for maximum delay analysis `best` - use best case conditions for maximum delay analysis Default is `worst`.
`min_opcond`	string	Sets the operating condition to use for Minimum Delay Analysis. The acceptable values for `min_opcond` for PolarFire can be the following: `slow_lv_ht` - use `slow_lv_ht` conditions for minimum delay analysis `slow_lv_lt` - use `slow_lv_lt` conditions for minimum delay analysis `fast_hv_lt` - use `fast_hv_lt` conditions for minimum delay analysis Default is fast_hv_lt. `min_opcond` for SmartFusion® 2, IGLOO® 2, and RTG4™ can be as following: `worst` - use worst case conditions for minimum delay analysis `typical` - use typical conditions for minimum delay analysis `best` - use best case conditions for minimum delay analysis Default is `best`.
`interclockdomain_analysis`	string	Enables or disables inter-clock domain analysis. Value can be the following: yes - enables inter-clock domain analysis no - disables inter-clock domain analysis Default is no. Timing-driven place-and-route is affected by this option.
`use_bibuf_loopbacks`	string	Instructs the timing analysis whether to consider loopback path in bidirectional buffers (D->Y, E->Y) as false-path {no}. Default is no; i.e., loopbacks are false paths. Values can be the following: yes - enables loopback in bibufs no - disables loopback in bibufs
`enable_recovery_removal_checks`	string	Enables recovery checks to be included in max-delay analysis and removal checks in min-delay analysis. Default is no. Values can be the following: yes - enables recovery an removal checks no - disables recovery and removal checks
`break_at_async`	string	Specifies whether or not timing analysis is allowed to cross asynchronous pins (clear, reset of sequential elements). Default is yes. Values can be the following: yes - enables breaking paths at asynchronous ports no - disables breaking paths at asynchronous ports. Timing-driven place-and-route is affected by this option.
`filter_when_slack_below`	floating point	Specifies a minimum slack value for paths reported by list_paths. Not set by default.
`filter_when_slack_above`	floating point	Specifies a maximum slack value for paths reported by list_paths. Not set by default.
`remove_slack_filters`	None	Removes the slack minimum and maximum set using `-filter_when_slack_below` and `-filter_when_slack_above`.
`limit_max_paths`	integer	Specifies the maximum number of paths reported by list_paths. Default is 20. Number must be greater than 0.
`expand_clock_network`	string	Specify whether or not clock network details are reported in expand_path. Default is yes. Values can be the following: yes - enables expanded clock network information in paths no - disables expanded clock network information in paths.
`expand_parallel_paths`	integer	Specify the number of parallel paths {paths with the same ends} to include in expand_path. Default is 1. Number must be greater than 0.
`analysis_scenario`	string	Specify the constraint scenario to be used for timing analysis. Default scenario is Primary.
`tdpr_scenario`	string	Specify the constraint scenario to be used for timing-driven place-and-route. Default scenario is Primary. Timing-driven place-and-route is affected by this option.
`reset`	None	Reset all options to the default values, except those for analysis and TDPR scenarios, which remain unchanged.

Supported Families


PolarFire®
PolarFire SoC
SmartFusion® 2
IGLOO® 2
RTG4™

Example

The following script commands the timing engine to use best operating conditions for both max-delay analysis and min-delay analysis:

set_options -max_opcond {best} -min_opcond {best}

set_options -max_opcond {fast_hv_lt} -min_opcond {fast_hv_lt}

The following script changes the scenario used by timing-driven place-and-route and saves the change in the Libero project for place-and-route tools to see the change.

set_options -tdpr_scenario {My_TDPR_Scenario}

Related Examples on GitHub

set_options

v2024.1