[FFmpeg-devel] [PATCH] ARM: NEON optimised {put, avg}_h264_chroma_mc[48]

Ian Caulfield ian.caulfield
Mon Aug 25 13:16:04 CEST 2008

2008/8/25 M?ns Rullg?rd <mans at mansr.com>:
> "Ian Caulfield" <ian.caulfield at gmail.com> writes:
>> 2008/8/25 Mans Rullgard <mans at mansr.com>
>>> +        vld1.64         {d4, d5}, [r1], r4
>> Can you guarantee any kind of alignment on the address in r1? If so,
>> potentially better performance can be achieved by specifying the
>> alignment in the opcode...
> I know, and I've specified it everywhere I know of a guaranteed
> alignment.  I don't know which line you're quoting, but if it's the
> source address for an h264_chroma_mc function, there are no promises.

Fair enough - hadn't looked at your other patches.

> Do you have something ARMv7 based?

No, but I'm quite familiar with the Neon units on the Cortex-A8 and -A9.


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