User`s manual

Specifying SDF files for simulation
ModelSim Xilinx User’s Manual Standard Delay Format (SDF) Timing Annotation 8-219
several models, each having its own SDF file. In this case, specify an SDF file for
each instance. For example,
vsim -sdfmax /system/u1=asic1.sdf -sdfmax /system/u2=asic2.sdf system
SDF specification with the GUI
As an alternative to the command-line options, you may specify SDF files in the
Load Design dialog box under the SDF tab.
This dialog box
is presented if
you invoke the
simulator
without any
arguments or if
you select
"Load New
Design..." under
the simulator’s
file menu. For
Verilog designs,
you may also
specify SDF
files by using
the
$sdf_annotate
system task. See
"The
$sdf_annotate
system task"
(8-
222)
for more
details.
Errors and warnings
Errors issued by the SDF annotator while loading the design prevent the
simulation from continuing, whereas warnings do not. Use the -sdfnoerror option
with vsim
(CR-148) to change SDF errors to warnings so that the simulation can
continue. Warning messages can be suppressed by using vsim with either the
-sdfnowarn or +nosdfwarn options.
Another option is to use the SDF page from the Load Design dialog box (shown
above). Select Disable SDF warnings (-sdfnowarn, or +nosdfwarn) to disable