AMD Opteron bug can cause incorrect results

GERMAN SITE 3D Chips has spotted a bug report on the AMD site that could cause Opteron systems to hang or incorrect results to be produced.

The bug is related to REP MOVS instructions which could result in succeeding instructions being skipped or an incorrect address size or data size to be used.

Opteron users are being advised to contact their AMD reps for information on a BIOS update, while the firm also says it plans a fix.

The report from 3D Chips is here, and that page also contains a link to the other bug info AMD has published in June. µ