[FFmpeg-devel] [PATCH] ac3dsp: Change punpckhqdq to movhlps in ac3_max_msb_abs_int16().

[Justin Ruggles]

On 02/16/2011 01:54 PM, Ronald S. Bultje wrote:

> Hi,
> 
> 2011/2/16 Justin Ruggles <justin.ruggles at gmail.com>:
>> ---
>> There really isn't any measurable speed difference, mostly because this is outside the loop, but it makes the intention clearer I think.
>>
>>  libavcodec/x86/ac3dsp.asm |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
> [..]
>> @@ -111,7 +111,7 @@ cglobal ac3_max_msb_abs_int16_%1, 2,2,5, src, len
>>  %endif
>>  %ifidn mmsize, 16
>>      mova        m0, m2
>> -    punpckhqdq  m0, m0
>> +    movhlps     m0, m0
>>      por         m2, m0
> 
> He meant remove the mova also.


Oh, i see. nice. New patch coming soon.

-Justin