[Mplayer-users] compile without MMX

[Nick Kurshev]

Hi, Christoph Lampert!

On 2001-07-13 21:45:08 you wrote:

>On Fri, 13 Jul 2001, Felix Buenemann wrote:
>
>
>> > Yeah, so do I .. but early K6-2's had broken MMX as I understand it. Thats
>> > why I always upgrade late :)
>> well if it's really broken, then it's most probable only single instructions,
>> that cause probs, test if it works and if not you could try debugging mplayer
>> to find instructions that cause probs and then it could be tried to find a
>> workaround for that then (by using some other instructions).
>
>I did not hear of broken MMX in K6-2 before. However Dariusz said, it
>the CPU used to work with DivX (with it does not anymore). So it's most definitely
>one or a few recently broken MMX instructions.
>Problem is, I have no test-program that identifies this and trying by
>hand is much more work than I would like to (I know my way around
>assembler, but I'm not a i386/MMX professional).
>Too bad the instruction does not crash, but simply gives wrong results
>(which is wrong pictures).
>
Yes! About this problem I've read in internet (sorry! I forgot the name of that site)
In short: problem was: under MS Explorer some AMD's chips (k6-2, k6-III or some earlier
Athlons-0.25 mkm) doesn't show correctly JPEG pictures (GIF - o'k). This distortion was
like color snow (there was printed a sample of picture). Probably there was solution to avoid
this problem - try to find out in inet similar materials - it may help you.

Best regards! Nick (2001-07-14 09:45:23)








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