User guide

C-57
Compile-Time Options
-parameters filename
Changes parameters specified in the file to values specified in the
file. The syntax for a line in the file is as follows:
assign value path_to_parameter
The path to the parameter is similar to a hierarchical name except
that you use the forward slash character (/) instead of a period as
the delimiter. See “Changing Parameter Values From the
Command Line” on page 3-12.
Checking for X and Z Values in Conditional Expressions
-xzcheck [nofalseneg]
Checks all the conditional expressions in the design and displays
a warning message every time VCS evaluates a conditional
expression to have an X or Z value.
nofalseneg
Suppress the warning message when the value of a conditional
expression transitions to an X or Z value and then to 0 or 1 in
the same simulation time step.
Options to Specify the Time Scale
-timescale=time_unit/time_precision
It may happen that some source files contain the ‘timescale
compiler directive and others do not. In this case, if you specify
the source files that do not contain the ‘timescale compiler
directive on the command line before you specify the ones that
do, this is an error condition and VCS halts compilation by default.
This option enables you to specify the timescale for the source
files that do not contain this compiler directive and precede the