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#include "Halide.h"
#include <iostream>
using namespace Halide;
int main(int argc, char *argv[]) {
Var x, xi;
Func kernel1;
kernel1(x) = floor((x + 0.5f) / 3.0f);
Func kernel2;
kernel2(x) = sqrt(4 * x * x) + kernel1(x);
Func kernel3;
kernel3(x) = cast<int32_t>(round(x + kernel2(x)));
Target target = get_jit_target_from_environment();
if (target.has_gpu_feature() || target.has_feature(Target::OpenGLCompute)) {
kernel1.gpu_tile(x, xi, 32).compute_root();
kernel2.gpu_tile(x, xi, 32).compute_root();
kernel3.gpu_tile(x, xi, 32);
} else {
kernel1.compute_root();
kernel2.compute_root();
}
Buffer<int32_t> result = kernel3.realize({256}, target);
for (int i = 0; i < 256; i++) {
float a = floor((i + 0.5f) / 3.0f);
float b = sqrt(4 * i * i) + a;
int c = (int32_t)(round(i + b));
assert(result(i) == c);
}
printf("Success!\n");
return 0;
}
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