ModelSim SE User's Manual - Electrical and Computer Engineering

Registering DPI applications
Registering DPI applications UM-565
DPI applications do not need to be registered. However, each DPI imported or exported
task or function must be identified using SystemVerilog ‘import “DPI”’ or ‘export
“DPI”’syntax. Examples of the syntax follow:
export “DPI” t1;
task t1(input int i, output int o);
.
.
.
end task
import “DPI” function f1 void (input int i, ouput int o);
Your code must provide imported functions or tasks, compiled with an external compiler.
An imported task must return an int value, "1" indicating that it is returning due to a disable,
or "0" indicating otherwise.
These imported functions or objects may then be loaded as a shared library into the
simulator with either the command line option -sv_lib or -sv_liblist
. For example,
vlog dut.v
gcc -shared -o imports.so imports.c
vsim -sv_lib imports top -do
The -sv_lib option specifies the shared library name, without an extension. A file extension
is added by the tool, as appropriate to your platform. For a list of file extensions accepted
by platform, see "DPI file loading" (UM-580).
You can also use the command line options -sv_root and -sv_liblist to control the process
for loading imported functions and tasks. These options are defined in the SystemVerilog
3.1a LRM.
ModelSim SE User’s Manual