User guide

13-41
SDF Backannotation
Timopt then displays the percentage of identified sequential devices
to which it can actually apply optimizations followed by messages
about the optimization process.
TIMOPT optimized 75 percent of the design
Starting TIMOPT Delay optimizations
Done TIMOPT Delay Optimizations
DONE TIMOPT
The next step is to simulate the design and see if the optimizations
applied by timopt produce a satisfactory increase in performance.
If you are not satisfied there are additional steps that you can take to
get more optimizations from timopt.
If timopt was able to identify all the clock signals and all the
sequential devices with an absolute certainty it simply applies its
optimizations. If timopt is uncertain about a number of clock signals
and sequential devices then you can use the following process to
maximize timopt optimizations:
1. Timopt writes a configuration file named timopt.cfg in the current
directory that lists the signals and sequential devices it’s not sure
of.
2. You review and edit this file, validating that the signals in the file
are or are not clock signals and that the module definitions in it
are or are not sequential devices. If you do not need to make any
changes in the file, go to step 5. If you do make changes, go to
step 3.
3. Compile your design again with the +timopt+clock_period
compile-time option.