[FFmpeg-cvslog] r26033 - trunk/libavcodec/ac3enc.c

Justin Ruggles justin.ruggles
Tue Dec 21 20:58:59 CET 2010

On 12/21/2010 02:39 PM, Justin Ruggles wrote:

> On 12/20/2010 05:44 PM, Justin Ruggles wrote:
>> On 12/20/2010 05:33 PM, Ronald S. Bultje wrote:
>>> Hi,
>>> On Mon, Dec 20, 2010 at 5:30 PM, Justin Ruggles
>>> <justin.ruggles at gmail.com> wrote:
>>>> All of the configurations which failed after this revision are x86.
>>> Is it possible that one of the optimized functions on these platforms,
>>> which isn't tested otherwise, is causing this? E.g. consider that
>>> float-to-int routines require different float values depending on
>>> optimization level...
>> I tried all x86 versions of sad[0] (C, MMX, MMX2, SSE2) and they passed
>> on my system, so I don't think there is anything fundamentally wrong
>> with how ac3enc is using sad[0].
> I was able to duplicate the test failures using OpenBSD 4.8 i386 in
> VirtualBox.  Now I'm trying to see if I can track down the specific problem.

results for different versions of sad[0]:
C: ok
MMX: fail
MMX2: fail
SSE2: ok

The x86_32 BSD FATE systems all have 3DNow so they do not use the SSE2
version.  Next step: try to figure out what is wrong with the MMX and
MMX2 versions.


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