For a large layoff employers in CA are required to file a WARN with the state 60 days prior to the layoff. There is nothing listed here under Broadcom or Avago (link below). A large layoff is > 50 employees for a more than 75 person company.
http://www.edd.ca.gov/jobs_and_training/warn/WARNReport7-1-2015to1-10-2016.pdf