Hi On Fri, Sep 12, 2014 at 09:49:30PM +0200, Mikulas Patocka wrote: > Hi > > Here I'm sending two patches to fix portability for 586-class machines > (Pentium, K6, etc.) > > > If the CPU is generic, 386, 486 or pentium, we must not use cmov in inline > assembler. > [...] > > --- > configure | 4 ++++ > libavcodec/x86/mathops.h | 2 +- > 2 files changed, 5 insertions(+), 1 deletion(-) > > Index: ffmpeg/configure > =================================================================== > --- ffmpeg.orig/configure 2014-09-12 21:46:25.710512294 +0200 > +++ ffmpeg/configure 2014-09-12 21:46:32.099587711 +0200 > @@ -3840,8 +3840,12 @@ elif enabled sparc; then [...] > i[345]86|pentium) > cpuflags="-march=$cpu" > + disable i686 > disable mmx > ;; > # targets that do NOT support nopl and conditional mov (cmov)
applied this for the rest, please see james and hendriks replies also, maybe you want to setup a i586 fate client, so these issues are detected quicker ? See: http://ffmpeg.org/fate.html Thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Asymptotically faster algorithms should always be preferred if you have asymptotical amounts of data
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