Hey, On Thu, Sep 29, 2011 at 2:42 PM, Jim Kukunas <james.t.kuku...@linux.intel.com> wrote: > Hi Folks, > > This patch series introduces a SSE3 implementation of Evas's common > engine blending routines. > > Why SSE3?: > The lddqu instruction, introduced in SSE3, is faster then a typical > unaligned load in the situation where we load from, but not store to, > an unaligned address which crosses a cache line. This yields itself well > to the blending functions which operate on two separate arrays. We single > step until we obtain an aligned address for the destination array, and use > lddqu to load the other unaligned array. > > Why do we need an SSE implementation?: > GCC does perform some auto-vectorization, but misses a lot of > opportunities for leveraging SSE, specifically when operating on > packed integers, as opposed to floating-point. With GCC 4.6.0 and > the CFLAGS listed below, the c implementation isn't vectorized, and > the MMX implementation performance is suboptimal. > > A few tests which demonstrate the performance impact: > > Setup: > Intel Atom N270, Intel 945GME, Expedite Xlib engine > GCC 4.5.1 CFLAGS=-m32 -mtune=atom -O2 -msse3 > > Rect Blend: > C: 21.80 FPS +/- 0.028674 > MMX: 27.41 FPS +/- 0.021344 > SSE3: 46.90 FPS +/- 0.376106 > > Image Blend Fade Unscaled: > C: 15.46 FPS +/- 0.031314 > MMX: 24.92 FPS +/- 0.055902 > SSE3: 34.28 FPS +/- 0.099457 > > Image Blend Solid Fade Unscaled: > C: 22.03 FPS +/- 0.097125 > MMX: 33.78 FPS +/- 0.190351 > SSE3: 46.86 FPS +/- 0.437874 > > Setup: > Intel Atom N455, Intel GMA 3150, Expedite Xlib engine > GCC 4.6.0 CFLAGS=-m32 -mtune=atom -O2 -msse3 > > Rect Blend: > C: 32.68 FPS +/- 0.218510 > MMX: 29.75 FPS +/- 0.527105 > SSE3: 54.24 FPS +/- 0.870486 > > Image Blend Unscaled: > C: 32.73 FPS +/- 0.359036 > MMX: 35.00 FPS +/- 1.099517 > SSE3: 50.93 FPS +/- 0.990806 > > Image Blend Occlude 3 Many: > C: 24.25 FPS +/- 0.213135 > MMX: 25.87 FPS +/- 0.470124 > SSE3: 36.96 FPS +/- 0.505757 > > I'm sure there is further room for improvement. > > Let me know what you guys think.
Very nice numbers... In svn they are. thanks Lucas De Marchi ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
