Messages in this thread | | | Date | Fri, 25 May 2007 00:50:25 +0100 | From | Alan Cox <> | Subject | Re: [PATCH] Display Intel Dynamic Acceleration feature in /proc/cpuinfo |
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On Thu, 24 May 2007 18:41:54 -0400 Dave Jones <davej@redhat.com> 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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