User guide

7-8
VCD and VPD File Utilities
-ignore [file]
Removes any signals/scopes contained in the given file from
value change diffing. The file contains a set of full path
specifications of signals and/or scopes, one per line.
Note:
The vcdiff utility applies the -scope/-level options first. It then
applies the -include option to the remaining scopes/signals,
and finally applies the -ignore option.
Options for Specifying When to Perform Value Change Diffing
The following options limit when vcdiff detects value change
differences:
-min time
Specifies the starting time (in simulation units) when value change
diffing is to begin (by default, time 0).
-max time
Specifies the stopping time (in simulation units) when value
change diffing will end. By default, this occurs at the latest time
found in either dump file.
-strobe first_time delta_time
Only checks for differences when the strobe is true. The strobe
is true at first_time (in simulation units) and then every
delta_time increment thereafter.
-prestrobe
Used in conjunction with -strobe, tells vcdiff to look for
differences just before the strobe is true.