by Maq Mannan President and CEO, DSM Technologies Chairman of the IEEE
1364 Verilog Standards Group Past Chairman of Open Verilog International
One of the major strengths of the Verilog language is the Programming
Language Interface (PLI), which allows users and Verilog application
developers to infinitely extend the capabilities of the Verilog language
and the Verilog simulator. In fact, the overwhelming success of the
Verilog language can be partly attributed to the exist- ence of its PLI.
Using the PLI, add-on products, such as graphical waveform displays or
pre and post simulation analysis tools, can be easily developed. These
products can then be used with any Verilog simulator that supports the
Verilog PLI. This ability to create third- party add-on products for
Verilog simulators has created new markets and provided the Verilog user
base with multiple sources of software tools. Hardware design engineers
can, and should, use the Verilog PLI to customize their Verilog
simulation environment. A Company that designs graphics chips, for exam-
ple, may wish to see the simulation results of a new design in some
custom graphical display. The Verilog PLI makes it possible, and even
trivial, to integrate custom soft- ware, such as a graphical display
program, into a Verilog simulator. The simulation results can then
dynamically be displayed in the custom format during simulation. And, if
the company uses Verilog simulators from mUltiple simulator vendors,
this integrated graphical display will work with all the simulators.