TheRock/rocm-systems/projects/hip-tests/catch/unit/cooperativeGrps/binary_partition.cc

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

#include <hip_test_common.hh>
#include <hip/hip_cooperative_groups.h>

#include <vector>

static __global__ void binary_part_odd_even_val(int* data, int* res) {
  auto block = cooperative_groups::this_thread_block();
  auto tile = cooperative_groups::coalesced_threads();

  int val = data[block.thread_rank()];
  auto part = cooperative_groups::binary_partition(tile, (val & 1));
  res[block.thread_rank()] = part.any(val % 2);
}

static __global__ void binary_part_tiled_odd_even_val(int* data, int* odd_res, int* even_res) {
  auto block = cooperative_groups::this_thread_block();
  auto tile16 = cooperative_groups::tiled_partition<16>(block);

  int val = data[block.thread_rank()];
  auto part = cooperative_groups::binary_partition(tile16, (val & 1));
  if (val & 1) {
    *odd_res = part.all((val % 2) != 0);
  } else {
    *even_res = part.all((val % 2) == 0);
  }
}

HIP_TEST_CASE(Unit_cg_binary_part) {
  const size_t warp_size = getWarpSize();

  int *data, *odd_res, *even_res;

  HIP_CHECK(hipMalloc(&data, sizeof(int) * warp_size));
  HIP_CHECK(hipMalloc(&odd_res, sizeof(int) * warp_size));
  HIP_CHECK(hipMalloc(&even_res, sizeof(int) * warp_size));

  HIP_CHECK(hipMemset(data, 0, sizeof(int) * warp_size));

  SECTION("odd_even part") {
    std::vector<int> input;
    std::vector<int> output(warp_size, -1);

    auto& res = odd_res;
    input.reserve(warp_size);
    for (size_t i = 0; i < warp_size; i++) {
      if (i < 16)
        input.push_back(10);
      else
        input.push_back(11);
    }

    HIP_CHECK(hipMemcpy(data, input.data(), sizeof(int) * input.size(), hipMemcpyHostToDevice));
    HIP_CHECK(hipMemcpy(res, output.data(), sizeof(int) * output.size(), hipMemcpyHostToDevice));

    binary_part_odd_even_val<<<1, warp_size>>>(data, res);
    HIP_CHECK(hipMemcpy(output.data(), res, sizeof(int) * output.size(), hipMemcpyDeviceToHost));
    for (size_t i = 0; i < warp_size; i++) {
      if (i < 16) {
        INFO("Output <16, index: " << i << " output: " << output[i]);
        REQUIRE(output[i] == 0);
      } else {
        INFO("Output >=16, index: " << i << " output: " << output[i]);
        REQUIRE(output[i] == 1);
      }
    }
  }

  SECTION("tiled odd/even part") {
    std::vector<int> input;
    input.reserve(warp_size);
    for (size_t i = 0; i < warp_size; i++) {
      input.push_back(i + 1);
    }

    HIP_CHECK(hipMemcpy(data, input.data(), sizeof(int) * input.size(), hipMemcpyHostToDevice));
    binary_part_tiled_odd_even_val<<<1, warp_size>>>(data, odd_res, even_res);
    int odd_output, even_output;
    HIP_CHECK(hipMemcpy(&odd_output, odd_res, sizeof(int), hipMemcpyDeviceToHost));
    HIP_CHECK(hipMemcpy(&even_output, even_res, sizeof(int), hipMemcpyDeviceToHost));
    REQUIRE(odd_output == 1);
    REQUIRE(even_output == 1);
  }

  HIP_CHECK(hipFree(data));
  HIP_CHECK(hipFree(odd_res));
  HIP_CHECK(hipFree(even_res));
}