[FFmpeg-devel] [PATCH 1/2] x86/videodsp: add emulated_edge_mc_mmxext
michaelni at gmx.at
Thu Jun 26 19:52:43 CEST 2014
On Mon, Jun 23, 2014 at 03:51:53PM -0300, James Almer wrote:
> This also changes hfix8_mmx and above to use mmx regs instead of
> gprs, and makes emulated_edge_mc_sse and emulated_edge_mc_sse2 use
> mmxext hfix and hvar functions instead of mmx where possible.
> This is mostly in preparation for an ssse3 version.
> Signed-off-by: James Almer <jamrial at gmail.com>
> Not benched.
> hfix4 and hfix6 mmx could also use mmx regs instead of gprs, but
> for this some proper benching would be required to make sure three
> punpck* are faster than a single imul in these old cpus.
1 cpu cycle faster
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
If a bugfix only changes things apparently unrelated to the bug with no
further explanation, that is a good sign that the bugfix is wrong.
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