https://bugs.webkit.org/show_bug.cgi?id=90949

Reviewed by Zoltan Herczeg.

The feBlend SVG filter modes can be greatly fasten up with ARM-NEON since
we are able to calculate with 2 pixels (8 channels) at the same time.
The code is written with NEON intrinsics and it doesn't affect the
general - it has the same behaviour as the original algorithm.
With this NEON optimization the calculation is ~4.5 times faster for each mode.

Existing tests cover this issue.

* CMakeLists.txt:
* GNUmakefile.list.am:
* Target.pri:
* WebCore.gypi:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
* platform/graphics/filters/FEBlend.cpp:
(WebCore::FEBlend::platformApplyGeneric):
(WebCore):
(WebCore::FEBlend::platformApplySoftware):
* platform/graphics/filters/FEBlend.h:
(FEBlend):
* platform/graphics/filters/arm/FEBlendNEON.h: Added.
(WebCore):
(FEBlendUtilitiesNEON):
(WebCore::FEBlendUtilitiesNEON::div255): integer divison with 255
(WebCore::FEBlendUtilitiesNEON::normal): calculate normal mode blending for two pixels
(WebCore::FEBlendUtilitiesNEON::multiply): calculate multiply mode blending for two pixels
(WebCore::FEBlendUtilitiesNEON::screen): calculate screen mode blending for two pixels
(WebCore::FEBlendUtilitiesNEON::darken): calculate darken mode blending for two pixels
(WebCore::FEBlendUtilitiesNEON::lighten): calculate lighten mode blending for two pixels
(WebCore::FEBlend::platformApplyNEON):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@122582 268f45cc-cd09-0410-ab3c-d52691b4dbfc