Advanced Micro Devices said Thursday that it would cut close to 3 percent of its staff […] The layoffs will affect close to 500 workers, leaving A.M.D. with about 14,960 employees. […] It plans to have the majority of workers stay on at A.M.D. to handle processor designs, while roughly 3,000 employees will head to a new manufacturing operation jointly owned by A.M.D. and investors backed by the Abu Dhabi government.