S32A_Blend_BlitRow32: for ARM without NEON

The S32A_Blend_BlitRow32 function was written and unrolled in ARM
assembly to improve the rendering performance on ARM cores lacking
NEON.

Added in SkBlitRow_opts_arm.cpp.

Performance improvement about ~18% on micro benchmarking.

Patch-by: Vassillis

git-svn-id: http://skia.googlecode.com/svn/trunk@598 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed