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+/***************************************************************************************************
+ * Copyright (c) 2017-2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are permitted
+ * provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright notice, this list of
+ *       conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *     * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used
+ *       to endorse or promote products derived from this software without specific prior written
+ *       permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ **************************************************************************************************/
+/*! \file
+    \brief Defines abstractions for managing loading and storing fragments to shared memory in the
+      efficient GEMM pipeline.
+*/
+#pragma once
+
+#include <cutlass/gemm/gemm_shared_tile.h>
+
+namespace cutlass {
+namespace gemm {
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template <
+    /// The load iterator.
+    typename Iterator_,
+    /// The transformer to be applied after the data has been copied from shared memory.
+    typename Transformer_ = Copy<typename Iterator_::Fragment> >
+
+struct SharedLoadStream {
+  /// The load iterator.
+  typedef Iterator_ Iterator;
+  /// The transformer.
+  typedef Transformer_ Transformer;
+
+  /// The fragment that is copied from shared memory.
+  typedef typename Iterator::Fragment FetchedFragment;
+  /// The fragment that is obtained after the transformation by the transformer.
+  typedef typename Transformer::OutputFragment TransformedFragment;
+  /// Make sure the fragments match.
+  static_assert((platform::is_same<FetchedFragment, typename Transformer::InputFragment>::value),
+                "");
+  /// The output fragment.
+  typedef TransformedFragment Fragment;
+
+  /// The params.
+  struct Params {
+    /// The iterator params.
+    typename Iterator::Params iterator;
+
+    /// Setup the params.
+    CUTLASS_HOST_DEVICE int initialize() { return iterator.initialize(); }
+  };
+
+  /// The storage in shared memory needed by that stream.
+  typedef typename Iterator::Storage SharedStorage;
+
+  /// Ctor.
+  CUTLASS_DEVICE SharedLoadStream() {}
+
+  /// Ctor.
+  CUTLASS_DEVICE SharedLoadStream(Params const &params, SharedStorage &shared_storage) {
+    this->initialize(params, shared_storage);
+  }
+
+  /// Initialize the stream.
+  CUTLASS_DEVICE void initialize(Params const &params, SharedStorage &shared_storage) {
+    // The iterator.
+    iterator = Iterator(params.iterator, shared_storage);
+    // The transformer.
+    transformer = Transformer();
+  }
+
+  /// Load the data from shared memory to the fetch fragment.
+  CUTLASS_DEVICE void copy(FetchedFragment &fetched) { shared_iterator_load(iterator, fetched); }
+
+  /// Load the data from shared memory to the fetch fragment.
+  CUTLASS_DEVICE void copy(int d, FetchedFragment &fetched) {
+    shared_iterator_load(iterator, fetched, d);
+  }
+
+  /// Commit the data.
+  CUTLASS_DEVICE void commit(FetchedFragment &fetched, TransformedFragment &transformed) {
+    transformer.transform(fetched, transformed);
+  }
+
+  /// Increment the stage.
+  CUTLASS_DEVICE void inc_stage() { iterator.inc_stage(); }
+
+  /// The iterator.
+  Iterator iterator;
+  /// The transformer.
+  Transformer transformer;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+}  // namespace gemm
+}  // namespace cutlass