TheRock/math-libs/libhipcxx/.upstream-tests/test/cuda/bad_atomic_alignment.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// Modifications Copyright (c) 2024-2025 Advanced Micro Devices, Inc.
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
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// THE SOFTWARE.

//
// UNSUPPORTED: libcpp-has-no-threads, pre-sm-60
// UNSUPPORTED: windows && pre-sm-70

// UNSUPPORTED: hipcc, hiprtc
// NOTE(HIP): HIP builtin atomics do not work with underaligned types (SWDEV-393058). 
// As a workaround, you need to use alignas(8) 
// to align the user-defined types manually. 

// <cuda/atomic>

// cuda::atomic<key>

// Original test issue:
// https://github.com/NVIDIA/libcudacxx/issues/160

#include <cuda/atomic>

#include "cuda_space_selector.h"
#include "test_macros.h"

template <template <typename, typename> class Selector>
struct TestFn
{
  __host__ __device__ void operator()() const
  {
    {
      struct key
      {
        int32_t a;
        int32_t b;
      };
      typedef cuda::std::atomic<key> A;
      Selector<A, constructor_initializer> sel;
      A& t = *sel.construct();
      cuda::std::atomic_init(&t, key{1, 2});
      auto r = t.load();
      auto d = key{5, 5};
      t.store(r);
      (void) t.exchange(r);
      (void) t.compare_exchange_weak(r, d, cuda::memory_order_seq_cst, cuda::memory_order_seq_cst);
      (void) t.compare_exchange_strong(d, r, cuda::memory_order_seq_cst, cuda::memory_order_seq_cst);
    }
    {
      struct alignas(8) key
      {
        int32_t a;
        int32_t b;
      };
      typedef cuda::std::atomic<key> A;
      Selector<A, constructor_initializer> sel;
      A& t = *sel.construct();
      cuda::std::atomic_init(&t, key{1, 2});
      auto r = t.load();
      auto d = key{5, 5};
      t.store(r);
      (void) t.exchange(r);
      (void) t.compare_exchange_weak(r, d, cuda::memory_order_seq_cst, cuda::memory_order_seq_cst);
      (void) t.compare_exchange_strong(d, r, cuda::memory_order_seq_cst, cuda::memory_order_seq_cst);
    }
  }
};

int main(int, char**)
{
  NV_DISPATCH_TARGET(NV_IS_HOST, TestFn<local_memory_selector>()();
                     , NV_PROVIDES_SM_70, TestFn<local_memory_selector>()();)

  NV_IF_TARGET(NV_IS_DEVICE, (TestFn<shared_memory_selector>()(); TestFn<global_memory_selector>()();))

  return 0;
}