This is the mail archive of the
binutils@sourceware.org
mailing list for the binutils project.
RE: PATCH: Move operand/address-size override prefixes before SIMD prefix
- From: "Menezes, Evandro" <evandro dot menezes at amd dot com>
- To: "malc" <av1474 at comtv dot ru>
- Cc: "Jan Beulich" <jbeulich at novell dot com>, "H. J. Lu" <hjl at lucon dot org>, binutils at sourceware dot org
- Date: Wed, 6 Dec 2006 18:30:49 -0600
- Subject: RE: PATCH: Move operand/address-size override prefixes before SIMD prefix
> 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.
--
_______________________________________________________
Evandro Menezes AMD Austin, TX