User guide

3-18
Compiling and Elaborating Your Design
r1 false at 1
r1 true at 1
If you compile and simulate example1 or example2 with the -
xzcheck compile-time option and the nofalseneg argument, VCS
does not display the warning message.
HSOPT Technology
The HSOPT technology improves both the compile-time and runtime
performance of VCS, reduces the amount of memory needed for both
compilation and simulation, and reduces the size of the simv
executable.
HSOPT is an LCA feature requiring a special license.
You enable HSOPT with the -hsopt compile-time option.
Any difference in simulation results could be merely a matter of a
different order of output messages, however they could also be the
result of race conditions.
The designs that benefit the most from HSOPT are as follows:
• designs with many layers of hierarchy
• gate-level designs
• structural RTL-level designs — Using libraries where the cells are
RTL-level code