[FFmpeg-devel] [FFmpeg-devel-irc] IRC log for 2010-02-19

Michael Niedermayer michaelni
Sun Feb 21 15:57:01 CET 2010

On Sat, Feb 20, 2010 at 12:00:54AM +0000, irc at mansr.com wrote:
> [00:00:16] <mru> if speed matters you should use asm
> [00:00:27] <Dark_Shikari> we only have inline asm on x86 atm
> [00:00:47] <mru> sometimes inline asm is the best solution
> [00:01:17] <Dark_Shikari> hmm. michael's idea seems to hurt in x264.
> [00:02:02] <Dark_Shikari> in fact, michael's idea would hurt in ffmpeg if ffmpeg had inline SIMD like x264 did
> [00:02:05] <Dark_Shikari> for that code
> [00:02:11] <Dark_Shikari> we use simd for the following
> [00:02:12] <Dark_Shikari> MIN(((x+28)*2184)>>16,2) = (x>2) + (x>32)
> [00:02:20] <Dark_Shikari> on two values at once
> [00:02:28] <Dark_Shikari> left side is simd, right side is C

any volunteers who would send a patch?


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Republics decline into democracies and democracies degenerate into
despotisms. -- Aristotle
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