The modification only uses the unique part of the StoreAdaptiveChannel
function. Pass byte to byte conformance test both on ARM32 and ARM64,
and the single function performance is similar with original assembly
version on different platforms. If not specified, the code is compiled
by GCC 4.6. The result is the "X version / C version" ratio, and the
less is better.
| run 100k times | cortex-a7 | cortex-a9 | cortex-a15 |
| use C as the base on each | (1.2Ghz) | (1.0Ghz) | (1.7Ghz) |
| CPU target | | | |
|----------------------------+-----------+-----------+------------|
| Neon asm | 20.97% | 37.70% | 25.41% |
| Neon inline | 36.93% | 51.80% | 38.14% |
| Neon intrinsics (GCC 4.6) | 27.78% | 43.71% | 26.50% |
| Neon intrinsics (GCC 4.8) | 27.16% | 38.22% | 26.87% |
| Neon intrinsics (LLVM 3.4) | 27.82% | 39.90% | 26.69% |
Change-Id: Ia55d8a268a70164b50676c604ae40b68fc183106
BUG=3580
R=andrew@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/30029004
Patch from Zhongwei Yao <zhongwei.yao@arm.com>.
git-svn-id: http://webrtc.googlecode.com/svn/trunk@7685 4adac7df-926f-26a2-2b94-8c16560cd09d
e497be3de1