PATCH: Move operand/address-size override prefixes before SIMD prefix

[H. J. Lu]

On Thu, Dec 07, 2006 at 01:26:59PM -0600, Menezes, Evandro wrote:
> > Thank you, but it does not. Because presence of both 0xf2 and 0xf3 in
> > the byte stream is not covered by this paragraph (perhaps the
> > situation is explained elsewhere in the manual?)
> 
> Yes, elsewhere: "The result of using multiple prefixes from a single group is unpredictable." (in "AMD64 Architecture Programmer's Manual Volume 3: General-Purpose and System Instructions", rev. 3.12, p. 3)
> 

Intel IA32 SDM Vol 2A says that such combinations are reserved and may
cause unpredictable behavior.

H.J.