1 |
At 2005-03-21T21:19:21+0000, Ryan Hill <deemkay@×××××.com> wrote: |
2 |
> Drake Wyrm <wyrm <at> haell.com> writes: |
3 |
> > At 2005-03-21T09:19:53+0100, David Holm <dholm <at> gentoo.org> |
4 |
> > wrote: |
5 |
> > > Isn't mmxext the same as mmx2 btw? |
6 |
> > |
7 |
> > Basically, yeah. "MMX2" is the trade name for the "mmxext" |
8 |
> > instruction set. Or "mmxext" is the flag that indicates the presence |
9 |
> > of the "MMX2" instruction set. However you want to look at it. |
10 |
> > |
11 |
> > Either way, if you want an authoritative source as to which to use, |
12 |
> > I'd suggest /proc/cpuinfo. |
13 |
> > |
14 |
> |
15 |
> MMX2 is supported by Pentium 3 Katmai and Coppermine processors. |
16 |
> MMXEXT is supported by Athlon processors. As far as I can tell |
17 |
> they're two very different things. I'm confused. |
18 |
|
19 |
You, and a lot of other people. |
20 |
|
21 |
Also, I should correct my earlier statement. "MMX2" is _a_ marketing |
22 |
name for the "Extensions to the MMX Instruction Set", which were |
23 |
apparently introduced in the AMD-K6-2E+ and AMD-K6-IIIE+. You're right, |
24 |
though; the Athlon was the first mainline processor with mmx(2|ext). |
25 |
These extensions were subsequently adopted by Intel into the Pentium II |
26 |
much in the same way AMD adopted Intel's original MultiMedia eXtensions. |
27 |
|
28 |
In my further research on the subject, it looks like Intel has been of |
29 |
late bragging up it's whiz-bang new "Intel Wireless MMX2 Technology". |
30 |
It's apparently an instruction set extension targeted at all-in-one |
31 |
cell-phone-camera-music-player-PDA gadgets. As far as I can tell, it's |
32 |
the only time Intel has used the term "MMX2". |
33 |
|
34 |
Therefore, I recommend the use of "mmxext" to refer to the original |
35 |
multimedia extensions extensions, to avoid aggravating an |
36 |
already-confusing situation. |
37 |
|
38 |
-- |
39 |
Batou: Hey, Major... You ever hear of "human rights"? |
40 |
Kusanagi: I understand the concept, but I've never seen it in action. |
41 |
--Ghost in the Shell |