PATCH: Move operand/address-size override prefixes before SIMD prefix
Menezes, Evandro
evandro.menezes@amd.com
Thu Dec 7 00:31:00 GMT 2006
> Yes i know and now realize the mistake i made in the example
> byte stream -
> the line should have read:
> 0xf3 0x66 0x0f 0x11 ..
>
> The original question remains:
> <quote>
> What will it be? `movss', `movupd' #UD? Does the first prefix takes
> precedence or is there some sort of built in precedence rules (i.e.
> not all prefixes are equal)?
> </quote>
Off the top of my head, the opcode 0x0f 0x11 preceeded by both 0xf3 and 0x66 is an illegal instruction.
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Evandro Menezes AMD Austin, TX
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