User guide

21-34
OpenVera Native Testbench
print_deps
The -print_deps option is supplied with dep_check telling
the VCS compiler to output the dependencies for the source
files to standard output or to a user specified file.
-rvm
Use -rvm when RVM is used in the testbench.
tb_timescale
Specifies an overriding timescale for the testbench. For
example:
vcs -ntb_opts tb_timescale=1ns/1ps file.vr
This allows independent control of the testbench timescale as
opposed to picking up the `timescale of the last .v file
compiled.
Consider a case where you pass a timescale, T1, to VCS
during the testbench compilation phase with the -ntb_opts
tb_timescale option. If this timescale is different from the
elaborated timescale, T2, used for the design, then in addition
to T1 you also have to pass T2 during testbench compilation.
You pass T2 using the -timescale option. That is, the
timescale passed to VCS during the testbench compilation
phase should match the final elaborated timescale of the
design.
use_sigprop
Compiling the testbench with the +ntb_opts keyword option,
use_sigprop, enables the signal property access functions.
For example, vera_get_ifc_name().