On Wed, Jun 27, 2012 at 12:44:54PM +0100, Måns Rullgård wrote: > Kostya Shishkov <[email protected]> writes: > > > On Wed, Jun 27, 2012 at 01:38:06PM +0200, Christophe Gisquet wrote: > >> 2012/6/27 Jason Garrett-Glaser <[email protected]>: > >> > This should be REP_RET, but otherwise looks good. Will probably be > >> > faster, too. > >> > >> Yes, as mentioned by Mans, the memcpy provided by whatever mingw-w64 > >> uses (old msvcrt?) is not very fast: see cycle count in commit > >> message. > >> > >> But even with a better memcpy, it should be a win. > > > > It should be a win without using _any_ memcpy at all :P > > Yes, but doing that permutation in-place is difficult.
Isn't that why some implementations generate swap pairs? But indeed, I'd rather not write FFT implementation myself. _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
