offload/test/offloading/taskloop_offload_nowait.cpp

   1 // RUN: %libomptarget-compilexx-and-run-generic
   2
   3 // REQUIRES: gpu
   4
   5 #include <cmath>
   6 #include <cstdlib>
   7 #include <iostream>
   8
   9 bool almost_equal(float x, float gold, float tol) {
  10   if (std::signbit(x) != std::signbit(gold))
  11     x = std::abs(gold) - std::abs(x);
  12
  13   return std::abs(gold) * (1 - tol) <= std::abs(x) &&
  14          std::abs(x) <= std::abs(gold) * (1 + tol);
  15 }
  16
  17 int main(int argc, char *argv[]) {
  18   constexpr const int N0{2};
  19   constexpr const int N1{182};
  20   constexpr const float expected_value{N0 * N1};
  21   float counter_N0{};
  22
  23 #pragma omp target data map(tofrom : counter_N0)
  24   {
  25 #pragma omp taskloop shared(counter_N0)
  26     for (int i0 = 0; i0 < N0; i0++) {
  27 #pragma omp target teams distribute parallel for map(tofrom : counter_N0) nowait
  28       for (int i1 = 0; i1 < N1; i1++) {
  29 #pragma omp atomic update
  30         counter_N0 = counter_N0 + 1.;
  31       }
  32     }
  33   }
  34
  35   if (!almost_equal(counter_N0, expected_value, 0.1)) {
  36     std::cerr << "Expected: " << expected_value << " Got: " << counter_N0
  37               << '\n';
  38     return -1;
  39   }
  40
  41   return 0;
  42 }