Hewlett-Packard Co. said accounting errors at Autonomy Corp. have led it to cut reported 2010 revenue at the software maker’s largest unit by 54 percent, adding fuel to a legal dispute over its purchase of Autonomy.

Autonomy Systems Ltd.’s 2010 operating profit was restated as 81 percent lower, according to U.K. regulatory filings by Hewlett-Packard. The computer maker, which bought Autonomy for $11.1 billion in 2011 and later took an $8.8 billion writedown on the purchase, also said it has shared information from its investigation with regulators in the U.S. and U.K.

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