add bench for floor variants
git-svn-id: http://skia.googlecode.com/svn/trunk@4065 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/MathBench.cpp b/bench/MathBench.cpp
index 61ac26b..41176b4 100644
--- a/bench/MathBench.cpp
+++ b/bench/MathBench.cpp
@@ -5,6 +5,15 @@
#include "SkString.h"
#include "SkPaint.h"
+static float sk_fsel(float pred, float result_ge, float result_lt) {
+ return pred >= 0 ? result_ge : result_lt;
+}
+
+static float fast_floor(float x) {
+ float big = sk_fsel(x, 0x1.0p+23, -0x1.0p+23);
+ return (x + big) - big;
+}
+
class MathBench : public SkBenchmark {
enum {
kBuffer = 100,
@@ -296,6 +305,65 @@
typedef SkBenchmark INHERITED;
};
+class FloorBench : public SkBenchmark {
+ enum {
+ ARRAY = SkBENCHLOOP(1000),
+ LOOP = SkBENCHLOOP(1000),
+ };
+ float fData[ARRAY];
+ bool fFast;
+public:
+
+ FloorBench(void* param, bool fast) : INHERITED(param), fFast(fast) {
+ SkRandom rand;
+
+ for (int i = 0; i < ARRAY; ++i) {
+ fData[i] = rand.nextSScalar1();
+ }
+
+ if (fast) {
+ fName = "floor_fast";
+ } else {
+ fName = "floor_std";
+ }
+ }
+
+ virtual void process(float) {}
+
+protected:
+ virtual void onDraw(SkCanvas* canvas) {
+ SkRandom rand;
+ float accum = 0;
+ const float* data = fData;
+ float tmp[ARRAY] = {};
+
+ if (fFast) {
+ for (int j = 0; j < LOOP; ++j) {
+ for (int i = 0; i < ARRAY; ++i) {
+ accum += fast_floor(data[i]);
+ }
+ this->process(accum);
+ }
+ } else {
+ for (int j = 0; j < LOOP; ++j) {
+ for (int i = 0; i < ARRAY; ++i) {
+ accum += sk_float_floor(data[i]);
+ }
+ this->process(accum);
+ }
+ }
+ }
+
+ virtual const char* onGetName() {
+ return fName;
+ }
+
+private:
+ const char* fName;
+
+ typedef SkBenchmark INHERITED;
+};
+
///////////////////////////////////////////////////////////////////////////////
static SkBenchmark* M0(void* p) { return new NoOpMathBench(p); }
@@ -312,6 +380,9 @@
static SkBenchmark* M54(void* p) { return new IsFiniteBench(p, 4); }
static SkBenchmark* M55(void* p) { return new IsFiniteBench(p, 5); }
+static SkBenchmark* F0(void* p) { return new FloorBench(p, false); }
+static SkBenchmark* F1(void* p) { return new FloorBench(p, true); }
+
static BenchRegistry gReg0(M0);
static BenchRegistry gReg1(M1);
static BenchRegistry gReg2(M2);
@@ -325,3 +396,6 @@
static BenchRegistry gReg53(M53);
static BenchRegistry gReg54(M54);
static BenchRegistry gReg55(M55);
+
+static BenchRegistry gRF0(F0);
+static BenchRegistry gRF1(F1);