From c45ece5f7f53e2d1dacfe71d407ff495dfdc0f58 Mon Sep 17 00:00:00 2001 From: "commit-bot@chromium.org" Date: Mon, 13 Jan 2014 08:16:45 +0000 Subject: NEON fast path for box blur Calculate 8 channels in parallel by using 16-bits to store each channel. Due to the limitation of VQRDMULH, (int16 * int16 * 2 + 0x8000) >> 16, the fast path can only support kernelSize < 128. 8 significant bits are kept at least in each stage, the final error should less-equal than 1. Pre-fetching memory for X-direction read. In fact pre-fetching memory doesn't help much for Y direction read, since it is a waste to load a cache line for only read 8 bytes.(I left it there to keep the symmetry. pre-fetch is cheap :) ) bench data on Nexus 10 before: running bench [640 480] blur_image_filter_large_10.00_10.00 8888: cmsecs = 25081.48 running bench [640 480] blur_image_filter_small_10.00_10.00 8888: cmsecs = 25038.04 running bench [640 480] blur_image_filter_large_1.00_1.00 8888: cmsecs = 25209.04 running bench [640 480] blur_image_filter_small_1.00_1.00 8888: cmsecs = 24928.01 running bench [640 480] blur_image_filter_large_0.00_1.00 8888: cmsecs = 17160.98 running bench [640 480] blur_image_filter_large_0.00_10.00 8888: cmsecs = 17924.11 running bench [640 480] blur_image_filter_large_1.00_0.00 8888: cmsecs = 14609.19 running bench [640 480] blur_image_filter_large_10.00_0.00 8888: cmsecs = 14625.91 after: running bench [640 480] blur_image_filter_large_10.00_10.00 8888: cmsecs = 14848.42 running bench [640 480] blur_image_filter_small_10.00_10.00 8888: cmsecs = 16037.29 running bench [640 480] blur_image_filter_large_1.00_1.00 8888: cmsecs = 14819.55 running bench [640 480] blur_image_filter_small_1.00_1.00 8888: cmsecs = 14563.69 running bench [640 480] blur_image_filter_large_0.00_1.00 8888: cmsecs = 11905.34 running bench [640 480] blur_image_filter_large_0.00_10.00 8888: cmsecs = 11883.85 running bench [640 480] blur_image_filter_large_1.00_0.00 8888: cmsecs = 9576.51 running bench [640 480] blur_image_filter_large_10.00_0.00 8888: cmsecs = 9793.84 BUG= R=senorblanco@chromium.org, mtklein@google.com, reed@google.com, kevin.petit@arm.com, kevin.petit.arm@gmail.com Author: zheng.xu@arm.com Review URL: https://codereview.chromium.org/105893003 git-svn-id: http://skia.googlecode.com/svn/trunk@13036 2bbb7eff-a529-9590-31e7-b0007b416f81 --- bench/BlurImageFilterBench.cpp | 3 +++ 1 file changed, 3 insertions(+) (limited to 'bench/BlurImageFilterBench.cpp') diff --git a/bench/BlurImageFilterBench.cpp b/bench/BlurImageFilterBench.cpp index c39573d8e8..1cc205a70c 100644 --- a/bench/BlurImageFilterBench.cpp +++ b/bench/BlurImageFilterBench.cpp @@ -20,6 +20,7 @@ #define FILTER_HEIGHT_LARGE 256 #define BLUR_SIGMA_SMALL 1.0f #define BLUR_SIGMA_LARGE 10.0f +#define BLUR_SIGMA_HUGE 80.0f class BlurImageFilterBench : public SkBenchmark { public: @@ -92,3 +93,5 @@ DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, tr DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false);) DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true);) DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false);) +DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, true);) +DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, false);) -- cgit v1.2.3