CUTLASS: tile_iterator_tensor_op.h Source File

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tile_iterator_tensor_op.h
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29 #pragma once
30
31 #include "cutlass/array.h"
32 #include "cutlass/layout/matrix.h"
33 #include "cutlass/layout/pitch_linear.h"
34
35 #include "cutlass/epilogue/warp/tensor_op_policy.h"
36
38
39 namespace cutlass {
40 namespace epilogue {
41 namespace warp {
42
44
46 template <
47 typename WarpShape,
48 typename OperatorShape,
49 typename Element,
50 typename Layout
51 >
52 class TileIteratorTensorOp;
53
55
57 template <
58 typename WarpShape_,
59 typename OperatorShape_,
60 typename Element_
61 >
62 class TileIteratorTensorOp<WarpShape_, OperatorShape_, Element_, layout::RowMajor> {
63 public:
64
65 using WarpShape = WarpShape_;
66 using OperatorShape = OperatorShape_;
67 using Element = Element_;
68 using Layout = layout::RowMajor;
69
70 using TensorRef = TensorRef<Element, Layout>;
71 using TensorCoord = MatrixCoord;
72 using Index = typename TensorRef::Index;
73 using LongIndex = typename TensorRef::LongIndex;
74
75 using Policy = TensorOpPolicy<WarpShape, OperatorShape, Layout>;
76
78 using Shape = MatrixShape<
79 Policy::kRowsPerIteration,
80 WarpShape::kN
81 >;
82
84 using Fragment = Array<
85 Element,
86 Policy::OperatorCount::kColumn * Policy::kElementsPerAccess>;
87
89 //using AccumulatorTile = typename Operator::FragmentC;
90
92 static int const kIterations = Policy::kIterations;
93
94 // Internal constants
95 struct Detail {
96 static int const kLanesInQuad = 4;
97 };
98
100 using Padding = MatrixShape<
101 0,
102 Detail::kLanesInQuad * Policy::kElementsPerAccess>;
103
104 private:
105
107 using AccessType = AlignedArray<Element, Policy::kElementsPerAccess>;
108
109 //
110 // Data members
111 //
112
114 AccessType *pointer_;
115
117 Layout layout_;
118
119 public:
120
122 CUTLASS_HOST_DEVICE
123 TileIteratorTensorOp(): pointer_(nullptr) { }
124
126 CUTLASS_HOST_DEVICE
127 TileIteratorTensorOp(
128 TensorRef const &ref,
129 unsigned lane_id
130 ):
131 pointer_(reinterpret_cast<AccessType *>(ref.data())),
132 layout_(ref.stride()[0] / Policy::kElementsPerAccess) {
133
134 int quad_id = (lane_id / Detail::kLanesInQuad);
135 int lane_in_quad = (lane_id % Detail::kLanesInQuad);
136
137 pointer_ += layout_({quad_id, lane_in_quad});
138 }
139
141 CUTLASS_HOST_DEVICE
142 TileIteratorTensorOp & add_pointer_offset(Index pointer_offset) {
143 pointer_ += pointer_offset / Policy::kElementsPerAccess;
144 return *this;
145 }
146
148 CUTLASS_HOST_DEVICE
149 TileIteratorTensorOp & add_tile_offset(TensorCoord const &tile_offset) {
150
151 pointer_ += layout_({
152 tile_offset.row() * Shape::kRow,
153 (tile_offset.column() * Shape::kColumn / Policy::kElementsPerAccess)
154 });
155
156 return *this;
157 }
158
160 CUTLASS_HOST_DEVICE
161 TileIteratorTensorOp & operator+=(TensorCoord const &tile_offset) {
162 add_tile_offset(tile_offset);
163 return *this;
164 }
165
167 CUTLASS_HOST_DEVICE
168 void store_with_pointer_offset(Fragment const &frag, Index pointer_offset) {
169
170 AccessType const *frag_ptr = reinterpret_cast<AccessType const *>(&frag);
171
172 CUTLASS_PRAGMA_UNROLL
173 for (int n = 0; n < Policy::OperatorCount::kColumn; ++n) {
174 pointer_[n * Detail::kLanesInQuad + pointer_offset / Policy::kElementsPerAccess] = frag_ptr[n];
175 }
176 }
177
179 CUTLASS_HOST_DEVICE
180 void store(Fragment const &frag) {
181 store_with_pointer_offset(frag, 0);
182 }
183
185 CUTLASS_HOST_DEVICE
186 void load_with_pointer_offset(Fragment &frag, Index pointer_offset) const {
187
188 AccessType *frag_ptr = reinterpret_cast<AccessType *>(&frag);
189
190 CUTLASS_PRAGMA_UNROLL
191 for (int n = 0; n < Policy::OperatorCount::kColumn; ++n) {
192 frag_ptr[n] = pointer_[n * Detail::kLanesInQuad + pointer_offset / Policy::kElementsPerAccess];
193 }
194 }
195
197 CUTLASS_HOST_DEVICE
198 void load(Fragment &frag) const {
199 load_with_pointer_offset(frag, 0);
200 }
201 };
202
204
205 } // namespace warp
206 } // namespace epilogue
207 } // namespace cutlass
208
cutlass::MatrixShape
Describes the size of a matrix tile.
Definition: matrix_shape.h:42
cutlass::MatrixCoord::column
CUTLASS_HOST_DEVICE Index const & column() const
Returns the column of the coordinate.
Definition: matrix_coord.h:85
cutlass
Definition: aligned_buffer.h:35
tensor_op_policy.h
Defines basic structures needed for implementing the warp-scoped phase of the epilogue. These quantities assume a &#39;column-major&#39; arrangement of TensorOp instructions, of which a row-oriented slice is visible per iteration.
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::load_with_pointer_offset
CUTLASS_HOST_DEVICE void load_with_pointer_offset(Fragment &frag, Index pointer_offset) const
Load.
Definition: tile_iterator_tensor_op.h:186
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::TileIteratorTensorOp
CUTLASS_HOST_DEVICE TileIteratorTensorOp(TensorRef const &ref, unsigned lane_id)
Constructor from TensorRef.
Definition: tile_iterator_tensor_op.h:127
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::WarpShape
WarpShape_ WarpShape
Definition: tile_iterator_tensor_op.h:65
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::add_pointer_offset
CUTLASS_HOST_DEVICE TileIteratorTensorOp & add_pointer_offset(Index pointer_offset)
Adds a pointer offset.
Definition: tile_iterator_tensor_op.h:142
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::add_tile_offset
CUTLASS_HOST_DEVICE TileIteratorTensorOp & add_tile_offset(TensorCoord const &tile_offset)
advances in units of whole tiles along the logical coordinate space of the tensor ...
Definition: tile_iterator_tensor_op.h:149
cutlass::AlignedArray
Aligned array type.
Definition: array.h:511
cutlass::MatrixCoord::row
CUTLASS_HOST_DEVICE Index const & row() const
Returns the row of the coordinate.
Definition: matrix_coord.h:77
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::store_with_pointer_offset
CUTLASS_HOST_DEVICE void store_with_pointer_offset(Fragment const &frag, Index pointer_offset)
Store.
Definition: tile_iterator_tensor_op.h:168
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::operator+=
CUTLASS_HOST_DEVICE TileIteratorTensorOp & operator+=(TensorCoord const &tile_offset)
Definition: tile_iterator_tensor_op.h:161
array.h
Statically sized array of elements that accommodates all CUTLASS-supported numeric types and is safe ...
CUTLASS_PRAGMA_UNROLL
#define CUTLASS_PRAGMA_UNROLL
Definition: cutlass.h:110
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::store
CUTLASS_HOST_DEVICE void store(Fragment const &frag)
Store.
Definition: tile_iterator_tensor_op.h:180
nullptr
#define nullptr
nullptr
Definition: platform.h:144
cutlass::epilogue::warp::TensorOpPolicy
Policy details related to the epilogue.
Definition: tensor_op_policy.h:50
cutlass::TensorRef< Element, Layout >
CUTLASS_HOST_DEVICE
#define CUTLASS_HOST_DEVICE
Definition: cutlass.h:89
cutlass::epilogue::warp::TileIteratorTensorOp
Template for reading and writing tiles of accumulators to shared memory.
Definition: tile_iterator_tensor_op.h:52
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::LongIndex
typename TensorRef::LongIndex LongIndex
Definition: tile_iterator_tensor_op.h:73
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::Index
typename TensorRef::Index Index
Definition: tile_iterator_tensor_op.h:72
cutlass::TensorRef::Index
typename Layout::Index Index
Index type.
Definition: tensor_ref.h:165
cutlass::layout::RowMajor
Mapping function for row-major matrices.
Definition: layout/matrix.h:50
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::TileIteratorTensorOp
CUTLASS_HOST_DEVICE TileIteratorTensorOp()
Default constructor.
Definition: tile_iterator_tensor_op.h:123
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::Fragment
Array< Element, Policy::OperatorCount::kColumn *Policy::kElementsPerAccess > Fragment
This is the fragment size produced by one access of the iterator.
Definition: tile_iterator_tensor_op.h:86
matrix.h
Defines layout functions used by TensorRef and derived classes.
pitch_linear.h
Defines layout functions used by TensorRef and derived classes for pitch-linear memory.
cutlass::epilogue::warp::TileIteratorTensorOp< WarpShape_, OperatorShape_, Element_, layout::RowMajor >::load
CUTLASS_HOST_DEVICE void load(Fragment &frag) const
Load.
Definition: tile_iterator_tensor_op.h:198
cutlass::MatrixCoord
Definition: matrix_coord.h:39
cutlass::TensorRef::LongIndex
typename Layout::LongIndex LongIndex
Long index used for pointer offsets.
Definition: tensor_ref.h:168