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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: "Dave Korn" <dave dot korn at artimi dot com>, "Jan Beulich" <jbeulich at novell dot com>, "H. J. Lu" <hjl at lucon dot org>, binutils at sourceware dot org
- Date: Thu, 7 Dec 2006 13:26:59 -0600
- Subject: RE: PATCH: Move operand/address-size override prefixes before SIMD prefix
> 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)
HTH
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Evandro Menezes AMD Austin, TX