EXHIBIT 11.1 NEWBRIDGE NETWORKS CORPORATION COMPUTATION OF EARNINGS PER SHARE (Accounting principles generally accepted in Canada) (Canadian dollars, amounts in thousands except per share data) (Unaudited) Fiscal quarter ended ------------------------ Aug 3, Jul 28, 1997 1996 -------- -------- BASIC EARNINGS PER SHARE Net earnings $ 64,354 $ 60,801 ======== ======== Common Shares outstanding at the beginning of the period 171,859 168,676 Weighted average number of Common Shares issued during the period 1,105 552 -------- -------- Weighted average number of Common Shares outstanding during the period 172,964 169,228 ======== ======== Basic earnings per share $ 0.37 $ 0.36 ======== ======== FULLY DILUTED EARNINGS PER SHARE Earnings before imputed earnings $ 64,354 $ 60,801 After tax imputed earnings from the investment of funds received through dilution 3,979 2,883 -------- -------- Adjusted net earnings $ 68,333 $ 63,684 ======== ======== Weighted average number of Common Shares outstanding during the period 172,964 169,228 Weighted average common share equivalents based on conversion of outstanding stock options 16,118 12,482 -------- -------- Weighted average number of Common Shares and equivalents outstanding during the period 189,082 181,710 ======== ======== Fully diluted earnings per share $ 0 .36 $ 0.35 ======== ======== EARNINGS PER SHARE EXPRESSED IN U.S. DOLLARS Daily average exchange rate of a Canadian dollar for U.S. dollars as reported by the Federal Reserve Bank of New York $ 0.7242 $ 0.7309 Basic earnings per share, in U.S. dollars $ 0.27 $ 0.26 ======== ======== Fully diluted earnings per share, in U.S. dollars $ 0.26 $ 0.26 ======== ======== (Page 21 of 23)