AMD Athlon 6 Dokumentacja Pobierz pdf (Strona 93)

Product Errata 93

Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors

25759 Rev. 3.79 July 2009

166 FXSAVE/FXRSTOR Instructions Use 64-bit Format in

Compatibility Mode

Description

In compatibility mode, FXSAVE/FXRSTOR instructions use the 64-bit memory image format (see

figure 11-8 in the AMD64 Architecture Programmer's Manual Volume 2: System Programming,

order# 24593) as opposed to the non-64-bit format (figure 11-9).

Potential Effect on System

A minor performance loss observed due to saving an additional 16 quadwords to memory.

Suggested Workaround

None required.

Fix Planned

Yes

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AMD Athlon 6 Dokumentacja Strona 93