Report disabled timing arcs
Syntax
report_disable_timing [‑user_disabled] [‑column_style <arg>] [‑file <arg>]
[‑append] [‑cells <args>] [‑return_string] [‑quiet] [‑verbose]
Usage
Name | Description |
---|---|
[-user_disabled]
|
Report only user disabled arcs |
[-column_style]
|
Style for path report columns: Values: variable_width, anchor_left Default: variable_width |
[-file]
|
Filename to output results to. (send output to console if -file is not used) |
[-append]
|
Append the results to file, don't overwrite the results file |
[-cells]
|
Run report_disable_timing on the specified cell(s) |
[-return_string]
|
Return report as string |
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
Description
Displays a report of timing paths that will be excluded from timing analysis in the current synthesized or implemented design.
The format of the report is organized into columns for "Cell or Port" to define the object associated with the timing path, "From" and "To" to define the timing path, the condition, and the reason for excluding the path from timing. The various reasons for exclusion are as follows:
- constraint -
set_disable_timing
constraint is specified - constant - Logic constant
- loop - Breaks a logic loop
- bidirect instance path - Feedback path through bidirectional instances
- bidirect net path - Feedback path on nets with bidirectional pins
Arguments
-user_disabled
- (Optional) Report only the timing arcs that have been disabled by the user with the set_disable_timing
command.
-column_style [ variable_width | anchor_left ]
- (Optional) Specifies the alignment of the columns in the report. The default is variable_width
when the option is not specified.
-file <arg>
- (Optional) Write the report into the specified file. The specified file will be overwritten if one already exists, unless -append
is also specified.
-append
- (Optional) Append the output of the command to the specified file rather than overwriting it.
-append
option can only be used with the -file
option.
-cells <arg>
- (Option) The details of the report will be based on the specified cells rather than the whole design.
-return_string
- (Optional) Directs the output to a Tcl string rather than to the standard output. The Tcl string can be captured by a variable definition and parsed or otherwise processed.
-file
option.-quiet
- (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
-verbose
- (Optional) Temporarily override any message limits and return all messages from this command.
set_msg_config
command.Examples
The following example reports all timing paths that will not be included in timing analysis:
report_disable_timing
The following example outputs the disable timing report as a string, stores it in a variable, and then puts it to the display:
set bad_time [report_disable_timing -return_string]
puts $bad_time