test_sqrt.cpp

#include <CL/sycl.hpp>
#include <iostream>

#ifdef USE_NATIVE
static inline float mySqrt(float x) {
#ifdef SYCL_DEVICE_ONLY
  return cl::sycl::native::sqrt(x);
#else
  return cl::sycl::sqrt(x);
#endif
}
#else
static inline float mySqrt(float x) { return cl::sycl::sqrt(x); }
#endif

int main() {
  cl::sycl::queue q{cl::sycl::gpu_selector{}};

  const cl::sycl::nd_range<1> range{32, 32};
  cl::sycl::buffer<float, 1> buf(32);
  q.submit([&](cl::sycl::handler &cgh) {
     auto acc = buf.get_access<cl::sycl::access::mode::discard_write>(cgh);
     cgh.parallel_for<class KernelName>(
         range, [=](cl::sycl::nd_item<1> itemIdx) {
           float x = itemIdx.get_global_linear_id();
           x = mySqrt(x);
           acc[itemIdx.get_global_id()] = x;
         });
   }).wait_and_throw();
  std::cout << "Testing done" << std::endl;
  return 0;
}