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MOVNTI and alignment for real mode

Konstantin_B_
Novice
188 Views

In the SDM rev. 48, vol. 2A, page 3-546, in the description of the exceptions for the MOVNTI instruction in the real-mode, it is specified that the instruction can generate

#GP If a memory operand is not aligned on a 16-byte boundary, regardless of segment.

There is no exceptions specified for unaligned stores for protected or long mode, except for AC enabled.  AMD reference is also silent about the unaligned stores.  Is this indeed an irregularity in real mode, or just a typo in the spec ?

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2 Replies
SergeyKostrov
Valued Contributor II
188 Views
>>...or long mode... What mode is it?
Bernard
Black Belt
188 Views

Sergey Kostrov wrote:

>>...or long mode...

What mode is it?

It is 64 bit operation mode.

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