| #include "SkBenchmark.h" |
| #include "SkColorPriv.h" |
| #include "SkMatrix.h" |
| #include "SkRandom.h" |
| #include "SkString.h" |
| #include "SkPaint.h" |
| |
| class MathBench : public SkBenchmark { |
| enum { |
| kBuffer = 100, |
| kLoop = 10000 |
| }; |
| SkString fName; |
| float fSrc[kBuffer], fDst[kBuffer]; |
| public: |
| MathBench(void* param, const char name[]) : INHERITED(param) { |
| fName.printf("math_%s", name); |
| |
| SkRandom rand; |
| for (int i = 0; i < kBuffer; ++i) { |
| fSrc[i] = rand.nextSScalar1(); |
| } |
| } |
| |
| virtual void performTest(float dst[], const float src[], int count) = 0; |
| |
| protected: |
| virtual int mulLoopCount() const { return 1; } |
| |
| virtual const char* onGetName() { |
| return fName.c_str(); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| int n = SkBENCHLOOP(kLoop * this->mulLoopCount()); |
| for (int i = 0; i < n; i++) { |
| this->performTest(fDst, fSrc, kBuffer); |
| } |
| } |
| |
| private: |
| typedef SkBenchmark INHERITED; |
| }; |
| |
| class MathBenchU32 : public MathBench { |
| public: |
| MathBenchU32(void* param, const char name[]) : INHERITED(param, name) {} |
| |
| protected: |
| virtual void performITest(uint32_t* dst, const uint32_t* src, int count) = 0; |
| |
| virtual void performTest(float* SK_RESTRICT dst, const float* SK_RESTRICT src, |
| int count) SK_OVERRIDE { |
| uint32_t* d = SkTCast<uint32_t*>(dst); |
| const uint32_t* s = SkTCast<const uint32_t*>(src); |
| this->performITest(d, s, count); |
| } |
| private: |
| typedef MathBench INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class NoOpMathBench : public MathBench { |
| public: |
| NoOpMathBench(void* param) : INHERITED(param, "noOp") {} |
| protected: |
| virtual void performTest(float dst[], const float src[], int count) { |
| for (int i = 0; i < count; ++i) { |
| dst[i] = src[i] + 1; |
| } |
| } |
| private: |
| typedef MathBench INHERITED; |
| }; |
| |
| class SlowISqrtMathBench : public MathBench { |
| public: |
| SlowISqrtMathBench(void* param) : INHERITED(param, "slowIsqrt") {} |
| protected: |
| virtual void performTest(float dst[], const float src[], int count) { |
| for (int i = 0; i < count; ++i) { |
| dst[i] = 1.0f / sk_float_sqrt(src[i]); |
| } |
| } |
| private: |
| typedef MathBench INHERITED; |
| }; |
| |
| static inline float SkFastInvSqrt(float x) { |
| float xhalf = 0.5f*x; |
| int i = *(int*)&x; |
| i = 0x5f3759df - (i>>1); |
| x = *(float*)&i; |
| x = x*(1.5f-xhalf*x*x); |
| // x = x*(1.5f-xhalf*x*x); // this line takes err from 10^-3 to 10^-6 |
| return x; |
| } |
| |
| class FastISqrtMathBench : public MathBench { |
| public: |
| FastISqrtMathBench(void* param) : INHERITED(param, "fastIsqrt") {} |
| protected: |
| virtual void performTest(float dst[], const float src[], int count) { |
| for (int i = 0; i < count; ++i) { |
| dst[i] = SkFastInvSqrt(src[i]); |
| } |
| } |
| private: |
| typedef MathBench INHERITED; |
| }; |
| |
| static inline uint32_t QMul64(uint32_t value, U8CPU alpha) { |
| SkASSERT((uint8_t)alpha == alpha); |
| const uint32_t mask = 0xFF00FF; |
| |
| uint64_t tmp = value; |
| tmp = (tmp & mask) | ((tmp & ~mask) << 24); |
| tmp *= alpha; |
| return ((tmp >> 8) & mask) | ((tmp >> 32) & ~mask); |
| } |
| |
| class QMul64Bench : public MathBenchU32 { |
| public: |
| QMul64Bench(void* param) : INHERITED(param, "qmul64") {} |
| protected: |
| virtual void performITest(uint32_t* SK_RESTRICT dst, |
| const uint32_t* SK_RESTRICT src, |
| int count) SK_OVERRIDE { |
| for (int i = 0; i < count; ++i) { |
| dst[i] = QMul64(src[i], (uint8_t)i); |
| } |
| } |
| private: |
| typedef MathBenchU32 INHERITED; |
| }; |
| |
| class QMul32Bench : public MathBenchU32 { |
| public: |
| QMul32Bench(void* param) : INHERITED(param, "qmul32") {} |
| protected: |
| virtual void performITest(uint32_t* SK_RESTRICT dst, |
| const uint32_t* SK_RESTRICT src, |
| int count) SK_OVERRIDE { |
| for (int i = 0; i < count; ++i) { |
| dst[i] = SkAlphaMulQ(src[i], (uint8_t)i); |
| } |
| } |
| private: |
| typedef MathBenchU32 INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool isFinite_int(float x) { |
| uint32_t bits = SkFloat2Bits(x); // need unsigned for our shifts |
| int exponent = bits << 1 >> 24; |
| return exponent != 0xFF; |
| } |
| |
| static bool isFinite_float(float x) { |
| return sk_float_isfinite(x); |
| } |
| |
| static bool isFinite_mulzero(float x) { |
| float y = x * 0; |
| return y == y; |
| } |
| |
| static bool isfinite_and_int(const float data[4]) { |
| return isFinite_int(data[0]) && isFinite_int(data[1]) && isFinite_int(data[2]) && isFinite_int(data[3]); |
| } |
| |
| static bool isfinite_and_float(const float data[4]) { |
| return isFinite_float(data[0]) && isFinite_float(data[1]) && isFinite_float(data[2]) && isFinite_float(data[3]); |
| } |
| |
| static bool isfinite_and_mulzero(const float data[4]) { |
| return isFinite_mulzero(data[0]) && isFinite_mulzero(data[1]) && isFinite_mulzero(data[2]) && isFinite_mulzero(data[3]); |
| } |
| |
| #define mulzeroadd(data) (data[0]*0 + data[1]*0 + data[2]*0 + data[3]*0) |
| |
| static bool isfinite_plus_int(const float data[4]) { |
| return isFinite_int(mulzeroadd(data)); |
| } |
| |
| static bool isfinite_plus_float(const float data[4]) { |
| return !sk_float_isnan(mulzeroadd(data)); |
| } |
| |
| static bool isfinite_plus_mulzero(const float data[4]) { |
| float x = mulzeroadd(data); |
| return x == x; |
| } |
| |
| typedef bool (*IsFiniteProc)(const float[]); |
| |
| #define MAKEREC(name) { name, #name } |
| |
| static const struct { |
| IsFiniteProc fProc; |
| const char* fName; |
| } gRec[] = { |
| MAKEREC(isfinite_and_int), |
| MAKEREC(isfinite_and_float), |
| MAKEREC(isfinite_and_mulzero), |
| MAKEREC(isfinite_plus_int), |
| MAKEREC(isfinite_plus_float), |
| MAKEREC(isfinite_plus_mulzero), |
| }; |
| |
| #undef MAKEREC |
| |
| static bool isFinite(const SkRect& r) { |
| // x * 0 will be NaN iff x is infinity or NaN. |
| // a + b will be NaN iff either a or b is NaN. |
| float value = r.fLeft * 0 + r.fTop * 0 + r.fRight * 0 + r.fBottom * 0; |
| |
| // value is either NaN or it is finite (zero). |
| // value==value will be true iff value is not NaN |
| return value == value; |
| } |
| |
| class IsFiniteBench : public SkBenchmark { |
| enum { |
| N = SkBENCHLOOP(1000), |
| NN = SkBENCHLOOP(1000), |
| }; |
| float fData[N]; |
| public: |
| |
| IsFiniteBench(void* param, int index) : INHERITED(param) { |
| SkRandom rand; |
| |
| for (int i = 0; i < N; ++i) { |
| fData[i] = rand.nextSScalar1(); |
| } |
| |
| if (index < 0) { |
| fProc = NULL; |
| fName = "isfinite_rect"; |
| } else { |
| fProc = gRec[index].fProc; |
| fName = gRec[index].fName; |
| } |
| } |
| |
| protected: |
| virtual void onDraw(SkCanvas* canvas) { |
| IsFiniteProc proc = fProc; |
| const float* data = fData; |
| // do this so the compiler won't throw away the function call |
| int counter = 0; |
| |
| if (proc) { |
| for (int j = 0; j < NN; ++j) { |
| for (int i = 0; i < N - 4; ++i) { |
| counter += proc(&data[i]); |
| } |
| } |
| } else { |
| for (int j = 0; j < NN; ++j) { |
| for (int i = 0; i < N - 4; ++i) { |
| const SkRect* r = reinterpret_cast<const SkRect*>(&data[i]); |
| counter += r->isFinite(); |
| } |
| } |
| } |
| |
| SkPaint paint; |
| if (paint.getAlpha() == 0) { |
| SkDebugf("%d\n", counter); |
| } |
| } |
| |
| virtual const char* onGetName() { |
| return fName; |
| } |
| |
| private: |
| IsFiniteProc fProc; |
| const char* fName; |
| |
| typedef SkBenchmark INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static SkBenchmark* M0(void* p) { return new NoOpMathBench(p); } |
| static SkBenchmark* M1(void* p) { return new SlowISqrtMathBench(p); } |
| static SkBenchmark* M2(void* p) { return new FastISqrtMathBench(p); } |
| static SkBenchmark* M3(void* p) { return new QMul64Bench(p); } |
| static SkBenchmark* M4(void* p) { return new QMul32Bench(p); } |
| |
| static SkBenchmark* M5neg1(void* p) { return new IsFiniteBench(p, -1); } |
| static SkBenchmark* M50(void* p) { return new IsFiniteBench(p, 0); } |
| static SkBenchmark* M51(void* p) { return new IsFiniteBench(p, 1); } |
| static SkBenchmark* M52(void* p) { return new IsFiniteBench(p, 2); } |
| static SkBenchmark* M53(void* p) { return new IsFiniteBench(p, 3); } |
| static SkBenchmark* M54(void* p) { return new IsFiniteBench(p, 4); } |
| static SkBenchmark* M55(void* p) { return new IsFiniteBench(p, 5); } |
| |
| static BenchRegistry gReg0(M0); |
| static BenchRegistry gReg1(M1); |
| static BenchRegistry gReg2(M2); |
| static BenchRegistry gReg3(M3); |
| static BenchRegistry gReg4(M4); |
| |
| static BenchRegistry gReg5neg1(M5neg1); |
| static BenchRegistry gReg50(M50); |
| static BenchRegistry gReg51(M51); |
| static BenchRegistry gReg52(M52); |
| static BenchRegistry gReg53(M53); |
| static BenchRegistry gReg54(M54); |
| static BenchRegistry gReg55(M55); |
