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 -------------------- --------------------------- Feb 1, Jan 26, Feb 1, Jan 26, 1998 1997 1998 1997 ---- ---- ---- ---- Basic earnings (loss) per share Net earnings (loss) $(144,283) $ 63,031 $(21,936) $186,613 ========= ======== ======== ======== Common Shares outstanding at the beginning of the period 175,305 170,741 171,859 168,676 Weighted average number of Common Shares issued, net of Common Shares repurchased, during the period 71 200 2,479 1,464 --------- -------- -------- -------- Weighted average number of Common Shares outstanding during the period 175,376 170,941 174,338 170,140 ========= ======== ======== ======== Basic earnings (loss) per share (82)c 37c (13)c $ 1.10 ========= ======== ======== ======== Fully diluted earnings (loss) per share Earnings (loss) before imputed earnings $(144,283) $ 63,031 $(21,936) $186,613 After tax imputed earnings from the investment of funds received through dilution -- 2,693 -- 8,241 --------- -------- -------- -------- Adjusted net earnings (loss) $(144,283) $ 65,724 $(21,936) $194,854 ========= ======== ======== ======== Weighted average number of Common Shares outstanding during the period 175,376 170,941 174,338 170,140 Weighted average common share equivalents based on conversion of outstanding stock options -- 14,096 -- 13,500 --------- -------- -------- -------- Weighted average number of Common Shares and equivalents outstanding during the period 175,376 185,037 174,338 183,640 ========= ======== ======== ======== Fully diluted earnings (loss) per share (82)c 36c (13)c $ 1.06 ========= ======== ======== ======== Earnings (loss) 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 $0.7006 $0.7406 $0.7071 $ 0.7346 Basic earnings (loss) per share, in U.S. dollars (58)c 27c (9)c 81c ========= ======== ======== ======== Fully diluted earnings (loss) per share, in U.S. dollars (58)c 26c (9)c 78c ========= ======== ======== ========