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 Three fiscal quarters ended --------------------- --------------------------- Jan 30, Jan 31, Jan 30, Jan 31, 2000 1999 2000 1999 ------ ------- ------- ------- Basic earnings (loss) per share Net earnings (loss) $(274,646) $120,119 $ 74,349 $208,953 ========= ======== ======== ======== Common Shares outstanding at the beginning of the period 181,069 176,877 180,105 175,686 Weighted average number of Common Shares issued during the period 337 719 784 1,128 --------- -------- -------- -------- Weighted average number of Common Shares outstanding during the period 181,406 177,596 180,889 176,814 ======= ======= ======= ======= Basic earnings (loss) per share $ (1.51) $ 0.68 $ 0.41 $ 1.18 ========= ======== ======== ======== Fully diluted earnings (loss) per share Earnings (loss) before imputed earnings $(274,646) $120,119 $ 74,349 $208,953 After tax imputed earnings from the investment of funds received through dilution -- 7,353 -- 21,006 --------- -------- -------- -------- Adjusted net earnings (loss) $(274,646) $127,472 $ 74,349 $229,959 ========= ======== ======== ======== Weighted average number of Common Shares outstanding during the period 181,406 177,596 180,889 176,814 Weighted average common share equivalents based on conversion of outstanding stock options -- 22,355 -- 21,214 --------- -------- -------- -------- Weighted average number of Common Shares and equivalents outstanding during the period 181,406 199,951 180,889 198,028 ========= ======== ======== ======== Fully diluted earnings (loss) per share $ (1.51) $ 0.64 $ 0.41 $ 1.16 ========= ======== ======== ========