[FFmpeg-devel] [PATCH 2/2] x86/alacdsp: add simd optimized functions

Paul B Mahol onemda at gmail.com
Tue Oct 6 09:44:00 CEST 2015


On 10/6/15, James Almer <jamrial at gmail.com> wrote:
> On 10/5/2015 6:48 PM, Paul B Mahol wrote:
>> On 10/4/15, James Almer <jamrial at gmail.com> wrote:
>>> Signed-off-by: James Almer <jamrial at gmail.com>
>>> ---
>>>  libavcodec/alacdsp.c          |   3 +
>>>  libavcodec/alacdsp.h          |   1 +
>>>  libavcodec/x86/Makefile       |   2 +
>>>  libavcodec/x86/alacdsp.asm    | 133
>>> ++++++++++++++++++++++++++++++++++++++++++
>>>  libavcodec/x86/alacdsp_init.c |  44 ++++++++++++++
>>>  5 files changed, 183 insertions(+)
>>>  create mode 100644 libavcodec/x86/alacdsp.asm
>>>  create mode 100644 libavcodec/x86/alacdsp_init.c
>>>
>>
>> Have you measured speed gain?
>
> About three to four times faster than c.

I was more interested in overall gain.
If fate covers this functions and fate still passes it should be fine imho.
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