From 11e5b972a984c7b4e09ba4dfeacc7bd805107c5a Mon Sep 17 00:00:00 2001 From: "commit-bot@chromium.org" Date: Fri, 8 Nov 2013 20:14:16 +0000 Subject: 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 --- bench/MathBench.cpp | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'bench/MathBench.cpp') 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")) /////////////////////////////////////////////////////////////////////////////// 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(); ) -- cgit v1.2.3