The calculations of shares used to compute basic and diluted earnings (loss) per share for the three months ended March 30, 2012 and March 31, 2011 were as follows (in thousands):

	Three months ended

	March 30, 2012		March 31, 2011
Weighted average shares outstanding—basic		279,487		277,712
Potential dilutive common shares		—		—

Weighted average shares outstanding—diluted		279,487		277,712

Options to purchase the Company's common stock, unvested shares of restricted stock and unvested performance-based stock awards aggregating 27.6 million shares of common stock have not been included for the three months ended March 30, 2012 because their effect would have been antidilutive. Options to purchase the Company's common stock, unvested shares of restricted stock and unvested performance-based stock awards aggregating 19.9 million shares of common stock have not been included for the three months ended March 31, 2011 because their effect would have been antidilutive.