User guide

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Compiling and Elaborating Your Design
Running a 64-Bit Compilation and Simulation
If you are encountering memory issues at runtime, you can use the
-full64 option. This option compiles a 64-bit binary executable for
simulating in 64-bit mode. In this case, you need to use a 64-bit
machine at both compile-time and runtime.
Make sure you check the VCS Release Notes for all compatible
platforms for running a 64-bit compilation.
Note that VCS assumes the Sun 64-bit linker is located at the following
location:
/usr/ccs/bin/sparcv9/ld
If VCS can’t find this linker, it uses a 32-bit linker.
The following example shows how to compile a 64-bit simulation:
% vcs -full64 source_files <other compile time options>
Using Radiant Technology
VCS’s Radiant Technology applies performance optimizations to your
design while VCS compiles your source code. These Radiant
optimizations improve the simulation performance of all types of
designs from behavioral and RTL to gate-level designs. Radiant
Technology particularly improves the performance of functional
simulations where there are no timing specifications or when delays
are distributed to gates and assignment statements.