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