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 quarters ended --------------------- Aug 1, Aug 2, 1999 1998 -------- -------- Basic earnings per share Net earnings $ 47,286 $ 35,520 ======== ======== Common Shares outstanding at the beginning of the period 180,105 175,686 Weighted average number of Common Shares issued during the period 294 419 -------- -------- Weighted average number of Common Shares outstanding during the period 180,399 176,105 ======== ======== Basic earnings per share $ 0.26 $ 0.20 ======== ======== Fully diluted earnings per share Earnings before imputed earnings $ 47,286 $ 35,520 After tax imputed earnings from the investment of funds received through dilution -- -- -------- -------- Adjusted net earnings $ 47,286 $ 35,520 ======== ======== Weighted average number of Common Shares outstanding during the period 180,399 176,105 Weighted average common share equivalents based on conversion of outstanding stock options -- -- -------- -------- Weighted average number of Common Shares and equivalents outstanding during the period 180,399 176,105 ======== ======== Fully diluted earnings per share $ 0.26 $ 0.20 ======== ======== 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 $ 0.6787 $ 0.6817 Basic earnings per share, in U.S. dollars $ 0.18 $ 0.14 ======== ======== Fully diluted earnings per share, in U.S. dollars $ 0.18 $ 0.14 ======== ======== (Page 36 of 38)