arm: dynamic NEON support for SkBlitRow_opts_arm.cpp

arm: dynamic NEON support for SkBlitRow_opts_arm.cpp

This patch moves all NEON-specific code from the source
src/opts/SkBlitRow_opts_arm.cpp into a new file that is
built as part of the 'opts_arm_neon' static library.
Committed: https://code.google.com/p/skia/source/detail?r=5016

[digit1, 2012-08-08 15:24:24]

In case you didn't get an email, this is the last-but-one patch for complete
dynamic ARM NEON support in Skia :)

I've tested the patch with three Android build setups (xoom, nexus_s, arm_all),
and verified that the 'tests' program run appropriately on all supported
devices.

[DerekS, 2012-08-08 17:42:35]

http://codereview.appspot.com/6449110/diff/1/src/opts/SkBlitRow_opts_arm_neon...
File src/opts/SkBlitRow_opts_arm_neon.cpp (right):

http://codereview.appspot.com/6449110/diff/1/src/opts/SkBlitRow_opts_arm_neon...
src/opts/SkBlitRow_opts_arm_neon.cpp:1079: NULL,   // S32_D565_Blend
we seem to loose this logic in translation...

/* Don't have a special version that assumes each src is opaque, but our S32A is
still faster than the default, so use it here	
*/	
#define S32_D565_Opaque_PROC    S32A_D565_Opaque_PROC	
#define S32_D565_Blend_PROC     S32A_D565_Blend_PROC

[digit1, 2012-08-08 19:09:32]

http://codereview.appspot.com/6449110/diff/1/src/opts/SkBlitRow_opts_arm_neon...
File src/opts/SkBlitRow_opts_arm_neon.cpp (right):

http://codereview.appspot.com/6449110/diff/1/src/opts/SkBlitRow_opts_arm_neon...
src/opts/SkBlitRow_opts_arm_neon.cpp:1079: NULL,   // S32_D565_Blend
Very nice catch. I'll fix this. Thanks.

[digit1, 2012-08-08 19:09:46]

Should be fixed in patch set 2.

[caryclark1, 2012-08-08 19:14:27]

I don't know this code at all so I'm going to defer to Derek this time.

[DerekS, 2012-08-08 20:42:02]

lgtm