ARM Skia NEON patches - 13 - S32A_Opaque
Blitrow32: S32A_Opaque code cleaning and speed improvement
- the old way of calculating alpha doesn't seem to be used anymore,
so remove the remaining code
- adding prefetching allows to improve performance greatly in some
cases at the expense of a little trade-off:
+-------+-----------+------------+
| count | Cortex-A9 | Cortex-A15 |
+-------+-----------+------------+
| 1,2 | 0 | 0 |
+-------+-----------+------------+
| 4 | 0 | -3% |
+-------+-----------+------------+
| 8 | 0 | -4% |
+-------+-----------+------------+
| 16 | 0 | -5% |
+-------+-----------+------------+
| 64 | +14% | 0 |
+-------+-----------+------------+
| 256 | +14% | +12% |
+-------+-----------+------------+
| 1024 | +115% | +15% |
+-------+-----------+------------+
BUG=
R=djsollen@google.com
Author: kevin.petit.arm@gmail.com
Review URL: https://chromiumcodereview.appspot.com/18459008
git-svn-id: http://skia.googlecode.com/svn/trunk@10026 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed