EXHIBIT 11.1 GENUS, INC. COMPUTATION OF NET INCOME (LOSS) PER SHARE (a) (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) Three Months Ended Nine Months Ended ------------------ ----------------- September 30 September 30 ------------ ------------ 1997 1996 1997 1996 -------- -------- -------- -------- Average common shares outstanding 16,954 16,841 16,824 16,630 Computation of incremental outstanding shares Net effect of dilutive stock options based on treasury stock method 106 99 ------- --------- ------- --------- 17,060 16,841 16,923 16,630 ------- --------- ------- --------- ------- --------- ------- --------- Net income (loss) $ 512 $ (8,105) $ 989 $ (6,867) ------- --------- ------- --------- ------- --------- ------- --------- Net income (loss) per share (a) $ 0.03 $ (0.48) $ 0.06 $ (0.41) ------- --------- ------- --------- ------- --------- ------- --------- COMPUTATION NOTES: (a) Presentation of fully diluted earnings per share for the three and nine months ended September 30, 1997 and 1996 is omitted because such amounts are materially the same as those presented above.