"Ronald S. Bultje" <rsbul...@gmail.com> writes:
> Hi,
>
> On Fri, Dec 7, 2012 at 1:01 PM, Måns Rullgård <m...@mansr.com> wrote:
>> "Ronald S. Bultje" <rsbul...@gmail.com> writes:
>>
>>> + %if mmsize <= 16 && HAVE_ALIGNED_STACK
>>
>> How much overhead would it be to drop HAVE_ALIGNED_STACK entirely?
>
> Well, for now, we still have a ton of functions that don't use the
> cglobal-method of allocating stack. I only ported h264/vp8 loopfilter,
> nothing else.
>
> But anyway, more generally, it's 4-5 instructions per function. For
> typical functions with an inner loop, that's negligible, but for a
> select small set of functions, it may be significant.
The remaining functions are ff_h264_idct8_add(4)_10_{sse2,avx},
ff_hadamard8_diff(16)_{sse2,ssse3}, and something in swscale.
Besides, does anyone still use 32-bit where performance is that
critical?
--
Måns Rullgård
m...@mansr.com
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