The modification only uses the unique part of the ResetAdaptiveChannel
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 | 15% | 30% | 12% |
| Neon inline | 21% | 30% | 12% |
| Neon intrinsics (GCC 4.6) | 19% | 32% | 12% |
| Neon intrinsics (GCC 4.8) | 20% | 32% | 12% |
| Neon intrinsics (LLVM 3.4) | 19% | 30% | 12% |
BUG=3580
R=andrew@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/29019004
Patch from Zhongwei Yao <zhongwei.yao@arm.com>.
git-svn-id: http://webrtc.googlecode.com/svn/trunk@7672 4adac7df-926f-26a2-2b94-8c16560cd09d
4ffc7341ca