[Mplayer-users] What to do before version 1.0
ak at cave.hop.stu.neva.ru
Mon Jun 11 21:25:53 CEST 2001
On Mon, 11 Jun 2001, Arpi wrote:
> > - determining the processor type and choosing the necessary optimised
> > functions at run-time, not at compile-time (that would allow making
> > universal binaries and therefore inclusion of mplayer into distributions)
> You can't use binaries compiled with -march=i686 -mcpu=i686 on amd or 486.
Then there has to be an option for compiling to an universal instruction
set. (or better yet an option in ./configure to set an instruction set and
architecture explicitly.) By the way, do -march=i686 -mcpu=i686 give any
noticeable speed gain over plain i386 code?
> This problem can't be solved at runtime...
What I wanted to say is that this sort of thing:
void imdct_do_512(float data,float delay)
int i, j;
should really be decided at runtime, not at compile time.
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