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 Three fiscal quarters ended -------------------- --------------------------- Jan 26, Jan 28, Jan 26, Jan 28, 1997 1996 1997 1996 ---- ---- ---- ---- Basic earnings per share Net earnings $63,031 $53,881 $186,613 $136,369 ====== ====== ======= ======= Common Shares outstanding at the beginning of the period 170,741 165,752 168,676 164,515 Weighted average number of Common Shares issued, net of Common Shares repurchased, during the period 200 796 1,464 1,327 ------- ------- ------- ------- Weighted average number of Common Shares outstanding at the end of the period 170,941 166,548 170,140 165,842 ======= ======= ======= ======= Basic earnings per share $0.37 $0.32 $1.10 $0.82 ======= ======= ======= ======= Fully diluted earnings per share Earnings before imputed earnings $63,031 $53,881 $186,613 $136,369 After tax imputed earnings from the investment of funds received through dilution 2,693 2,721 8,241 7,589 ------- ------- ------- ------- Adjusted net earnings $65,724 $56,602 $194,854 $143,958 ====== ====== ======= ======= Weighted average number of Common Shares outstanding at the end of the period 170,941 166,548 170,140 165,842 Weighted average common share equivalents based on conversion of outstanding stock options 14,096 13,986 13,500 13,823 ------- ------- -------- ------- Weighted average number of Common Shares and equivalents outstanding at the end of the period 185,037 180,534 183,640 179,665 ======= ======= ======= ======= Fully diluted earnings per share $0.36 $0.31 $1.06 $0.80 ======= ======= ======= ======= 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 $0.7406 $0.7342 $0.7346 $0.7354 Basic earnings per share, in U.S. dollars $0.27 $0.24 $0.81 $0.60 ======= ======= ======= ======= Fully diluted earnings per share, in U.S. dollars $0.26 $0.23 $0.78 $0.59 ======= ======= ======= ======= (Page 26 of 27)