TheRock/rocm-systems/projects/hip-tests/catch/unit/module/coopKernel.cpp

/*
 * Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 *
 * SPDX-License-Identifier: MIT
 */

#include <hip/hip_runtime.h>
#include <hip/hip_cooperative_groups.h>

using namespace cooperative_groups;
extern "C" {
__global__ void cooperativeKernelEx(int* output, int totalThreads) {
  grid_group grid = this_grid();
  int tid = threadIdx.x + blockDim.x * blockIdx.x;
  if (tid < totalThreads) {
    output[tid] = tid * 3;
  }
  // TODO: remove syncthreads with grid sync when compiler issue is fixed
  // grid.sync();
  __syncthreads();

  if (tid == 0) {
    output[0] = 2222;
  }
}

/*
 * Kernel which doesn't use cooperative groups and without any arguments
 */
__global__ void emptyKernel() {}

/*
 * Kernel which doesn't use cooperative groups and takes an argument
 * and updates the value with 100
 */
__global__ void argKernel(int* val) { *val = 100; }

/*
 * Kernel which uses cooperative groups and without any arguments
 */
__global__ void coopEmptykernel() {
  cooperative_groups::grid_group grid = cooperative_groups::this_grid();
  // TODO: remove syncthreads with grid sync when compiler issue is fixed
  // grid.sync();
  __syncthreads();
}

/*
 * Kernel which uses cooperative groups and takes arguments
 * and performs below operations
 * 1) All the threads in the block fills the element in the arr array
 *    based on the blockIdx.x
 * 2) Wait for all the blocks completes it's operations
 * 3) Fill each element in the output array with sum of elements in arr
 */
__global__ void coopFillArrayKernel(int* arr, int* output, int N) {
  cooperative_groups::grid_group grid = cooperative_groups::this_grid();

  if (blockIdx.x == 0)
    arr[0] = 10;
  else if (blockIdx.x == 1)
    arr[1] = 20;
  else if (blockIdx.x == 2)
    arr[2] = 30;
  else if (blockIdx.x == 3)
    arr[3] = 40;
  else if (blockIdx.x == 4)
    arr[4] = 50;
  else if (blockIdx.x == 5)
    arr[5] = 60;
  else if (blockIdx.x == 6)
    arr[6] = 70;
  else if (blockIdx.x == 7)
    arr[7] = 80;
  else if (blockIdx.x == 8)
    arr[8] = 90;
  else if (blockIdx.x == 9)
    arr[9] = 100;

  // TODO: remove syncthreads with grid sync when compiler issue is fixed
  // grid.sync();
  __syncthreads();

  for (int i = 0; i < N; i++) {
    output[blockIdx.x] = output[blockIdx.x] + arr[i];
  }
}
}