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#include "Halide.h"
#include "halide_benchmark.h"
#include <cstdio>
using namespace Halide;
using namespace Halide::Tools;
#define W 1024
#define H 160
int main(int argc, char **argv) {
Target target = get_jit_target_from_environment();
if (target.arch == Target::WebAssembly) {
printf("[SKIP] Performance tests are meaningless and/or misleading under WebAssembly interpreter.\n");
return 0;
}
Var x, y;
Func f, g;
Expr math = cast<float>(x + y);
for (int i = 0; i < 50; i++) {
math = sqrt(cos(sin(math)));
}
f(x, y) = math;
g(x, y) = math;
f.parallel(y);
Buffer<float> imf = f.realize({W, H});
double parallelTime = benchmark([&]() { f.realize(imf); });
printf("Realizing g\n");
Buffer<float> img = g.realize({W, H});
printf("Done realizing g\n");
double serialTime = benchmark([&]() { g.realize(img); });
for (int y = 0; y < H; y++) {
for (int x = 0; x < W; x++) {
if (imf(x, y) != img(x, y)) {
printf("imf(%d, %d) = %f\n", x, y, imf(x, y));
printf("img(%d, %d) = %f\n", x, y, img(x, y));
return 1;
}
}
}
printf("Times: %f %f\n", serialTime, parallelTime);
double speedup = serialTime / parallelTime;
printf("Speedup: %f\n", speedup);
if (speedup < 1.5) {
fprintf(stderr, "WARNING: Parallel should be faster\n");
return 0;
}
printf("Success!\n");
return 0;
}
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