/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-hipcub/checkouts/docs-5.7.0/hipcub/include/hipcub/backend/rocprim/warp/warp_exchange.hpp Source File

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-hipcub/checkouts/docs-5.7.0/hipcub/include/hipcub/backend/rocprim/warp/warp_exchange.hpp Source File#

hipCUB: /home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-hipcub/checkouts/docs-5.7.0/hipcub/include/hipcub/backend/rocprim/warp/warp_exchange.hpp Source File
warp_exchange.hpp
1 /******************************************************************************
2  * Copyright (c) 2010-2011, Duane Merrill. All rights reserved.
3  * Copyright (c) 2011-2018, NVIDIA CORPORATION. All rights reserved.
4  * Modifications Copyright (c) 2017-2021, Advanced Micro Devices, Inc. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  * * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * * Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * * Neither the name of the NVIDIA CORPORATION nor the
14  * names of its contributors may be used to endorse or promote products
15  * derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  ******************************************************************************/
29 
30 #ifndef HIPCUB_ROCPRIM_WARP_WARP_EXCHANGE_HPP_
31 #define HIPCUB_ROCPRIM_WARP_WARP_EXCHANGE_HPP_
32 
33 #include "../../../config.hpp"
34 #include "../util_type.hpp"
35 
36 #include <rocprim/warp/warp_exchange.hpp>
37 
38 BEGIN_HIPCUB_NAMESPACE
39 
40 template <
41  typename InputT,
42  int ITEMS_PER_THREAD,
43  int LOGICAL_WARP_THREADS = HIPCUB_DEVICE_WARP_THREADS,
44  int ARCH = HIPCUB_ARCH
45 >
46 class WarpExchange
47 {
48  using base_type = typename rocprim::warp_exchange<InputT, ITEMS_PER_THREAD, LOGICAL_WARP_THREADS>;
49 
50 public:
51  using TempStorage = typename base_type::storage_type;
52 
53 private:
54  TempStorage &temp_storage;
55 
56 public:
57  WarpExchange() = delete;
58 
59  explicit HIPCUB_DEVICE __forceinline__
60  WarpExchange(TempStorage &temp_storage) :
61  temp_storage(temp_storage)
62  {
63  }
64 
65  template <typename OutputT>
66  HIPCUB_DEVICE __forceinline__
67  void BlockedToStriped(
68  const InputT (&input_items)[ITEMS_PER_THREAD],
69  OutputT (&output_items)[ITEMS_PER_THREAD])
70  {
71  base_type rocprim_warp_exchange;
72  rocprim_warp_exchange.blocked_to_striped(input_items, output_items, temp_storage);
73  }
74 
75  template <typename OutputT>
76  HIPCUB_DEVICE __forceinline__
77  void StripedToBlocked(
78  const InputT (&input_items)[ITEMS_PER_THREAD],
79  OutputT (&output_items)[ITEMS_PER_THREAD])
80  {
81  base_type rocprim_warp_exchange;
82  rocprim_warp_exchange.striped_to_blocked(input_items, output_items, temp_storage);
83  }
84 
85  template <typename OffsetT>
86  HIPCUB_DEVICE __forceinline__
87  void ScatterToStriped(
88  InputT (&items)[ITEMS_PER_THREAD],
89  OffsetT (&ranks)[ITEMS_PER_THREAD])
90  {
91  ScatterToStriped(items, items, ranks);
92  }
93 
94  template <typename OutputT,
95  typename OffsetT>
96  HIPCUB_DEVICE __forceinline__
97  void ScatterToStriped(
98  const InputT (&input_items)[ITEMS_PER_THREAD],
99  OutputT (&output_items)[ITEMS_PER_THREAD],
100  OffsetT (&ranks)[ITEMS_PER_THREAD])
101  {
102  base_type rocprim_warp_exchange;
103  rocprim_warp_exchange.scatter_to_striped(input_items, output_items, ranks, temp_storage);
104  }
105 };
106 
107 END_HIPCUB_NAMESPACE
108 
109 #endif // HIPCUB_ROCPRIM_WARP_WARP_EXCHANGE_HPP_
hipcub::WarpExchange
Definition: warp_exchange.hpp:47