User guide

17-1

Using the PLI

Using the PLI 2

PLI is the programming language interface (PLI) between C/C++

functions and VCS. It helps to link applications containing C/C++

functions with VCS so that they execute concurrently. The C/C++

functions in the application use the PLI to read and write delay and

simulation values in the VCS executable, and VCS can call these

functions during simulation.

VCS has implemented the TF and ACC routines for the PLI. It has

also implemented the VPI procedural interface routine to some

extent.

VCS also supports a number of ACC routines that are not part of the

IEEE Verilog language reference manual. These routines access:

• Reading and writing to memories

• Multi-dimensional arrays