Re: [PATCH] Display Intel Dynamic Acceleration feature in /proc/cpuinfo

On Thu, 24 May 2007 18:41:54 -0400
Dave Jones <davej@xxxxxxxxxx> wrote:

On Thu, May 24, 2007 at 03:14:39PM -0700, H. Peter Anvin wrote:

> pbe collides with abuse by at least two vendors (AMD and
> Cyrix/Centaur/VIA) of this bit for 3DNow.

Unless I'm mistaken,

pbe comes from cpuid level 1

3dnow comes from cpuid level 0x80000001
though I did notice that amd have it in edx, whilst via have it in ecx
curiously.

The older AMD docs (CPU rev guide) list bit 31 of both 0x80000001 and
0x00000001 as 3dnow

All their example code/docs say to use 0x80000001

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