User guide

3-25
Compiling and Elaborating Your Design
Compile-Time Options That Impede or Accelerate VCS
There are a number of compile-time options that enhance or reduce
compilation and simulation performance. Consider looking for
opportunities when you can use the options that speed up compilation
or simulation and looking for ways to avoid the options that slow down
compilation or simulation.
Compile-Time Options That Slow Down Both Compilation and
Simulation
-debug
Enables line stepping.
+acc
Enables PLI ACC capabilities.
-full64
Compiles in 64-bit mode for 64-bit mode simulation.
Compile-Time Options That Slow Down Simulation
+pathpulse
Enables the PATHPULSE$ specparam in specify blocks.
+pulse_e
Drives an X value on narrow pulses.
+pulse_r
Filters out narrow pulses.
+pulse_int_e
Drives an X value on pulses narrower than interconnect delays.
+pulse_int_r
Filters out pulses narrower than interconnect delays.