Specification Update

Errata
54 Specification Update
AN112 A 64-bit Register IP-relative Instruction May Return Unexpected
Results
Problem: Under an unlikely and complex sequence of conditions in 64-bit mode, a register IP-
relative instruction result may be incorrect
Implication: A register IP-relative instruction result may be incorrect and could cause software to
read from or write to an incorrect memory location. This may result in an unexpected
page fault or unpredictable system behavior.
Workaround: It is possible for the BIOS to contain a workaround for this erratum.
Status: For the steppings affected, see the Summary Tables of Changes
.
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