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      1 /*
      2  * Copyright 2014 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "Benchmark.h"
      9 #include "SkRandom.h"
     10 #include "SkTemplates.h"
     11 #include "SkUtils.h"
     12 
     13 template <typename Memcpy32>
     14 class Memcpy32Bench : public Benchmark {
     15 public:
     16     explicit Memcpy32Bench(int count, Memcpy32 memcpy32, const char* name)
     17         : fCount(count)
     18         , fMemcpy32(memcpy32)
     19         , fName(SkStringPrintf("%s_%d", name, count)) {}
     20 
     21     virtual const char* onGetName() SK_OVERRIDE {
     22         return fName.c_str();
     23     }
     24 
     25     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
     26         return backend == kNonRendering_Backend;
     27     }
     28 
     29     virtual void onPreDraw() SK_OVERRIDE {
     30         fDst.reset(fCount);
     31         fSrc.reset(fCount);
     32 
     33         SkRandom rand;
     34         for (int i = 0; i < fCount; i++) {
     35             fSrc[i] = rand.nextU();
     36         }
     37     }
     38 
     39     virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
     40         for (int i = 0; i < loops; i++) {
     41             fMemcpy32(fDst, fSrc, fCount);
     42         }
     43     }
     44 
     45 private:
     46     SkAutoTMalloc<uint32_t> fDst, fSrc;
     47 
     48     int fCount;
     49     Memcpy32 fMemcpy32;
     50     const SkString fName;
     51 };
     52 
     53 template <typename Memcpy32>
     54 static Memcpy32Bench<Memcpy32>* Bench(int count, Memcpy32 memcpy32, const char* name) {
     55     return new Memcpy32Bench<Memcpy32>(count, memcpy32, name);
     56 }
     57 #define BENCH(memcpy32, count) DEF_BENCH(return Bench(count, memcpy32, #memcpy32); )
     58 
     59 
     60 // Let the libc developers do what they think is best.
     61 static void memcpy32_memcpy(uint32_t* dst, const uint32_t* src, int count) {
     62     memcpy(dst, src, sizeof(uint32_t) * count);
     63 }
     64 BENCH(memcpy32_memcpy, 10)
     65 BENCH(memcpy32_memcpy, 100)
     66 BENCH(memcpy32_memcpy, 1000)
     67 BENCH(memcpy32_memcpy, 10000)
     68 BENCH(memcpy32_memcpy, 100000)
     69 
     70 // Test our chosen best, from SkUtils.h
     71 BENCH(sk_memcpy32, 10)
     72 BENCH(sk_memcpy32, 100)
     73 BENCH(sk_memcpy32, 1000)
     74 BENCH(sk_memcpy32, 10000)
     75 BENCH(sk_memcpy32, 100000)
     76 
     77 #undef BENCH
     78