Re: [PATCH] x86: XOP prefix instructions decoder support

[H. Peter Anvin]

On August 19, 2025 6:00:04 PM PDT, Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:
>On Sat, 16 Aug 2025 18:36:17 -0700
>"H. Peter Anvin" <hpa@xxxxxxxxx> wrote:
>
>> The easiest way to think of XOP is as a VEX3 supporting a different set of map numbers (VEX3 supports maps 0-31, XOP maps are 8-31 but separate); however, the encoding format is the same. 
>
>Hmm, OK. We need to enable VEX3 support too. What about the opcode?
>Most of the opcode are the same, or different instructions?
>
>Thank you,
>
>

Different, that's the whole point ...