[FFmpeg-devel] [PATCH] x86/synth_filter: improve FMA version

Michael Niedermayer michaelni at gmx.at
Mon Mar 17 21:33:41 CET 2014


On Mon, Mar 17, 2014 at 04:40:28PM -0300, James Almer wrote:
> Replace mulps+subps with fnmaddps, resulting in two less instructions inside the
> inner loops.
> About 1% faster FMA3 performance.
> 
> Signed-off-by: James Almer <jamrial at gmail.com>
> ---
>  libavcodec/x86/dcadsp.asm | 42 +++++++++++++++++++++++++++++++++++-------
>  1 file changed, 35 insertions(+), 7 deletions(-)

applied

thanks

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I know you won't believe me, but the highest form of Human Excellence is
to question oneself and others. -- Socrates
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