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| author |  commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-11-08 20:14:16 +0000 |
|---|---|---|
| committer | commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-11-08 20:14:16 +0000 |
| commit | 11e5b972a984c7b4e09ba4dfeacc7bd805107c5a (patch) | |
| tree | 8b819ae42f35273010e987ce02363e381e6d2466 /bench/MathBench.cpp | |
| parent | 8f457e3230f1a4ce737f512ffbb5c919b8d02407 (diff) | |
Add sk_float_rsqrt with SSE + NEON fast paths.
Current numbers:
N4:
running bench [640 480] math_fastIsqrt NONRENDERING: cmsecs = 3.12
running bench [640 480] math_slowIsqrt NONRENDERING: cmsecs = 4.82
running bench [640 480] math_sk_float_rsqrt NONRENDERING: cmsecs = 1.99
Desktop:
running bench [640 480] math_fastIsqrt NONRENDERING: cmsecs = 0.89
running bench [640 480] math_slowIsqrt NONRENDERING: cmsecs = 0.94
running bench [640 480] math_sk_float_rsqrt NONRENDERING: cmsecs = 0.09
Haven't found any other benches where this is a significant effect yet.
BUG=
R=reed@google.com
Author: mtklein@google.com
Review URL: https://codereview.chromium.org/60083014
git-svn-id: http://skia.googlecode.com/svn/trunk@12203 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'bench/MathBench.cpp')
| -rw-r--r-- | bench/MathBench.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/bench/MathBench.cpp b/bench/MathBench.cpp index abe04e13d7..6327c3c580 100644 --- a/bench/MathBench.cpp +++ b/bench/MathBench.cpp @@ -92,6 +92,22 @@ private: typedef MathBench INHERITED; }; +class SkRSqrtMathBench : public MathBench { +public: + SkRSqrtMathBench() : INHERITED("sk_float_rsqrt") {} +protected: + virtual void performTest(float* SK_RESTRICT dst, + const float* SK_RESTRICT src, + int count) { + for (int i = 0; i < count; ++i) { + dst[i] = sk_float_rsqrt(src[i]); + } + } +private: + typedef MathBench INHERITED; +}; + + class SlowISqrtMathBench : public MathBench { public: SlowISqrtMathBench() : INHERITED("slowIsqrt") {} @@ -550,6 +566,7 @@ DEF_BENCH(return new DivModBench<int64_t>("int64_t")) /////////////////////////////////////////////////////////////////////////////// DEF_BENCH( return new NoOpMathBench(); ) +DEF_BENCH( return new SkRSqrtMathBench(); ) DEF_BENCH( return new SlowISqrtMathBench(); ) DEF_BENCH( return new FastISqrtMathBench(); ) DEF_BENCH( return new QMul64Bench(); ) |