On Feb 15, 2013, at 17:08, Claudio Freire wrote: > > SSE intrinsics (and automatic vectorization in fact) perform a lot > more poorly if you don't use __builtin_assume_aligned[0] > > > [0] http://gcc.gnu.org/projects/tree-ssa/vectorization.html#assume-aligned
Ah, of course ... but OS X memory allocators are guaranteed to return pointers that are aligned properly for SSE intrinsics, IIRC. And I presume that since FFmpeg uses intrinsics quite extensively, its allocators also do this (on platforms where it's not already the case)... Thanks for the link! R. _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
