[FFmpeg-devel] [PATCH] ac3enc: Add x86-optimized function to speed up log2_tab().

[Justin Ruggles]

On 02/13/2011 03:23 PM, Ronald S. Bultje wrote:

> Hi,
> 
> On Sun, Feb 13, 2011 at 2:49 PM, Justin Ruggles
> <justin.ruggles at gmail.com> wrote:
>> AC3DSPContext.ac3_max_msb_abs_int16() finds the maximum MSB of the absolute
>> value of each element in an array of int16_t.
> [..]
>> Athlon64 X2 6000+:
>>   C: 20718
>>  MMX:  3590
>> MMX2:  2906
>> SSE2:  2062
>>
>> Atom 330:
>>    C: 31838
>>  MMX:  7394
>>  SSE2:  3138
>> SSSE3:  2759

oops. for completeness, here is a missing benchmark:

Atom 330:
MMX2: 5309

-Justin