"ANTENNASIDEAREARATIO" and "ANTENNADIFFSIDEAREARATIO PWL" being used together in TECH LEF file

[alexroach-rl]

I've found that if both "ANTENNASIDEAREARATIO" and "ANTENNADIFFSIDEAREARATIO PWL" rules appear together for a layer in a TECH LEF file, then the "ANTENNADIFFSIDEAREARATIO PWL" statement is completely ignored for the purposes of antenna rule checking and repairing. The result is that the tool repeatedly adds a bunch of antenna diodes to the nets with antenna violations until it reaches the iteration limit.

I would have thought that if these two rules are used together, the tool would use the "ANTENNASIDEAREARATIO" rule for any nets without diffusion and then switch to the "ANTENNADIFFSIDEAREARATIO PWL" rule as soon as an antenna diode is added.

[maliberty]

@luis201420 or @eder-matheus please respond

[eder-matheus]

@alexroach-rl I believe you're right, our antenna checker tools is failing to to switch to the ANTENNADIFFSIDEAREARATIO rule once we insert the diode. @luis201420 is working on a fix for it. Thanks for reporting the bug!

[eder-matheus]

@alexroach-rl The antenna ratio checks were fixed in this PR: #7377

[alexroach-rl]

Thanks so much! Will update and give it a try.