[MPlayer-dev-eng] [PATCH] Set HAVE_FAST_CLZ according to CPU type
Reimar.Doeffinger at gmx.de
Tue Jan 19 21:30:35 CET 2010
no objection, just a comment
On Mon, Jan 18, 2010 at 03:00:25PM +0800, Zuxy Meng wrote:
> 1) x86/x86-64 runtime detection sets _fast_clz to "yes" because I
> assume that CPUs with a fast bsr/lzcnt have already enjoyed a larger
> market share than those w/o one, and it's the way of the future.
You could just as well say that those newer CPUs are probably those
where the extra speed gain matters least, so it's a rather arbitrary
decision either way.
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