CUTLASS: fragment_iterator_tensor_op.h Source File

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fragment_iterator_tensor_op.h
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38 #pragma once
39
40 #include "cutlass/array.h"
41 #include "cutlass/layout/matrix.h"
42
43 #include "cutlass/epilogue/warp/tensor_op_policy.h"
44
46
47 namespace cutlass {
48 namespace epilogue {
49 namespace warp {
50
52
54 template <
55 typename WarpShape,
56 typename OperatorShape,
57 typename OperatorElementC,
58 typename OperatorFragmentC,
59 typename Layout
60 >
61 class FragmentIteratorTensorOp;
62
64
66 template <
67 typename WarpShape_,
68 typename OperatorShape_,
69 typename OperatorElementC_,
70 typename OperatorFragmentC_
71 >
72 class FragmentIteratorTensorOp<WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor> {
73 public:
74
75 using WarpShape = WarpShape_;
76 using OperatorShape = OperatorShape_;
77 using OperatorElementC = OperatorElementC_;
78 using OperatorFragmentC = OperatorFragmentC_;
79 using Layout = layout::RowMajor;
80
81 using Policy = TensorOpPolicy<WarpShape, OperatorShape, Layout>;
82
84 using Fragment = Array<
85 OperatorElementC,
86 Policy::OperatorCount::kColumn * Policy::kElementsPerAccess>;
87
89 using AccumulatorTile = Array<
90 OperatorElementC,
91 OperatorFragmentC::kElements * Policy::OperatorCount::kRow * Policy::OperatorCount::kColumn>;
92
93 using OutputAccumulatorTile = AccumulatorTile;
94
96 static int const kIterations = Policy::kIterations;
97
98 private:
99
101 using AccessType = Array<OperatorElementC, Policy::kElementsPerAccess>;
102
103 private:
104
105 //
106 // Data members
107 //
108
110 AccessType const *accumulators_;
111
113 int index_;
114
115 public:
116
118 CUTLASS_HOST_DEVICE
119 FragmentIteratorTensorOp(AccumulatorTile const &accum):
120 accumulators_(reinterpret_cast<AccessType const *>(&accum)),
121 index_(0) {
122 }
123
125 CUTLASS_HOST_DEVICE
126 FragmentIteratorTensorOp &operator++() {
127 ++index_;
128 return *this;
129 }
130
132 CUTLASS_HOST_DEVICE
133 FragmentIteratorTensorOp &operator--() {
134 --index_;
135 return *this;
136 }
137
139 CUTLASS_HOST_DEVICE
140 void load(Fragment &frag, int index_offset = 0) const {
141
142 int index = index_ + index_offset;
143
144 AccessType *frag_ptr = reinterpret_cast<AccessType *>(&frag);
145
146 CUTLASS_PRAGMA_UNROLL
147 for (int n = 0; n < Policy::OperatorCount::kColumn; ++n) {
148
149 int accumulator_access_offset =
150 index + n * Policy::kAccumulatorColumnStride / Policy::kElementsPerAccess;
151
152 frag_ptr[n] = accumulators_[accumulator_access_offset];
153 }
154 }
155 };
156
158
160 template <
162 typename WarpShape_,
164 typename OperatorShape_,
166 typename OperatorElementC_,
168 typename OperatorFragmentC_,
170 int InterleavedK>
171 class FragmentIteratorTensorOp<WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_,
172 layout::ColumnMajorInterleaved<InterleavedK>> {
173 public:
174 using WarpShape = WarpShape_;
175 using OperatorShape = OperatorShape_;
176 using OperatorElementC = OperatorElementC_;
177 using OperatorFragmentC = OperatorFragmentC_;
178 static int const kInterleavedK = InterleavedK;
179 using Layout = layout::ColumnMajorInterleaved<kInterleavedK>;
180
181 using Policy = TensorOpPolicy<WarpShape, OperatorShape, Layout>;
182
184 using Fragment =
185 Array<OperatorElementC,
186 Policy::kElementsPerAccess * InterleavedK / OperatorShape::kN>;
187
189 using AccumulatorTile =
190 Array<OperatorElementC, OperatorFragmentC::kElements *
191 Policy::OperatorCount::kRow *
192 Policy::OperatorCount::kColumn>;
193
195 static int const kIterations = Policy::kIterations;
196
197 private:
199 using AccessType =
200 Array<OperatorElementC, Policy::kElementsPerAccess>;
201
202 private:
203 //
204 // Data members
205 //
206
208 AccessType const *accumulators_;
209
211 int index_;
212
213 public:
215 CUTLASS_HOST_DEVICE
216 FragmentIteratorTensorOp(AccumulatorTile const &accum)
217 : accumulators_(reinterpret_cast<AccessType const *>(&accum)),
218 index_(0) {}
219
221 CUTLASS_HOST_DEVICE
222 FragmentIteratorTensorOp &operator++() {
223 ++index_;
224 return *this;
225 }
226
228 CUTLASS_HOST_DEVICE
229 FragmentIteratorTensorOp &operator--() {
230 --index_;
231 return *this;
232 }
233
235 CUTLASS_HOST_DEVICE
236 void load(Fragment &frag, int index_offset = 0) const {
237 int index = index_ + index_offset;
238
239 AccessType *frag_ptr = reinterpret_cast<AccessType *>(&frag);
240
241 CUTLASS_PRAGMA_UNROLL
242 for (int n = 0; n < (InterleavedK / OperatorShape::kN); ++n) {
243 int index_m = index % (Policy::OperatorCount::kRow *
244 Policy::kIterationsPerInstruction);
245 int index_n = index / (Policy::OperatorCount::kRow *
246 Policy::kIterationsPerInstruction);
247 int accumulator_access_offset =
248 (index_m / Policy::kIterationsPerInstruction) *
249 (Policy::OperatorCount::kColumn *
250 Policy::kIterationsPerInstruction) +
251 (index_m % Policy::kIterationsPerInstruction) +
252 index_n * (InterleavedK / OperatorShape::kN) *
253 Policy::kIterationsPerInstruction +
254 n * Policy::kIterationsPerInstruction;
255
256 frag_ptr[n] = accumulators_[accumulator_access_offset];
257 }
258 }
259 };
260
262
263 } // namespace warp
264 } // namespace epilogue
265 } // namespace cutlass
266
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::WarpShape
WarpShape_ WarpShape
Definition: fragment_iterator_tensor_op.h:75
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::load
CUTLASS_HOST_DEVICE void load(Fragment &frag, int index_offset=0) const
Loads a fragment from the referenced part of the accumulator tile.
Definition: fragment_iterator_tensor_op.h:140
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::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::OutputAccumulatorTile
AccumulatorTile OutputAccumulatorTile
Definition: fragment_iterator_tensor_op.h:93
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::load
CUTLASS_HOST_DEVICE void load(Fragment &frag, int index_offset=0) const
Loads a fragment from the referenced part of the accumulator tile.
Definition: fragment_iterator_tensor_op.h:236
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::operator--
CUTLASS_HOST_DEVICE FragmentIteratorTensorOp & operator--()
Decrements.
Definition: fragment_iterator_tensor_op.h:229
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::WarpShape
WarpShape_ WarpShape
Definition: fragment_iterator_tensor_op.h:174
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::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::AccumulatorTile
Array< OperatorElementC, OperatorFragmentC::kElements *Policy::OperatorCount::kRow *Policy::OperatorCount::kColumn > AccumulatorTile
This is the complete warp-level accumulator tile.
Definition: fragment_iterator_tensor_op.h:91
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::Fragment
Array< OperatorElementC, Policy::OperatorCount::kColumn *Policy::kElementsPerAccess > Fragment
This is the fragment size produced by one access of the iterator.
Definition: fragment_iterator_tensor_op.h:86
cutlass::epilogue::warp::TensorOpPolicy
Policy details related to the epilogue.
Definition: tensor_op_policy.h:50
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::operator++
CUTLASS_HOST_DEVICE FragmentIteratorTensorOp & operator++()
Increments.
Definition: fragment_iterator_tensor_op.h:222
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::FragmentIteratorTensorOp
CUTLASS_HOST_DEVICE FragmentIteratorTensorOp(AccumulatorTile const &accum)
Constructs an iterator.
Definition: fragment_iterator_tensor_op.h:119
CUTLASS_HOST_DEVICE
#define CUTLASS_HOST_DEVICE
Definition: cutlass.h:89
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::FragmentIteratorTensorOp
CUTLASS_HOST_DEVICE FragmentIteratorTensorOp(AccumulatorTile const &accum)
Constructs an iterator.
Definition: fragment_iterator_tensor_op.h:216
cutlass::epilogue::warp::FragmentIteratorTensorOp
Definition: fragment_iterator_tensor_op.h:61
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::Fragment
Array< OperatorElementC, Policy::kElementsPerAccess *InterleavedK/OperatorShape::kN > Fragment
This is the fragment size produced by one access of the iterator.
Definition: fragment_iterator_tensor_op.h:186
cutlass::layout::RowMajor
Mapping function for row-major matrices.
Definition: layout/matrix.h:50
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::operator++
CUTLASS_HOST_DEVICE FragmentIteratorTensorOp & operator++()
Increments.
Definition: fragment_iterator_tensor_op.h:126
matrix.h
Defines layout functions used by TensorRef and derived classes.
cutlass::layout::ColumnMajorInterleaved
Definition: layout/matrix.h:343
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::ColumnMajorInterleaved< InterleavedK > >::AccumulatorTile
Array< OperatorElementC, OperatorFragmentC::kElements *Policy::OperatorCount::kRow *Policy::OperatorCount::kColumn > AccumulatorTile
This is the complete warp-level accumulator tile.
Definition: fragment_iterator_tensor_op.h:192
cutlass::epilogue::warp::FragmentIteratorTensorOp< WarpShape_, OperatorShape_, OperatorElementC_, OperatorFragmentC_, layout::RowMajor >::operator--
CUTLASS_HOST_DEVICE FragmentIteratorTensorOp & operator--()
Decrements.
Definition: fragment_iterator_tensor_op.h:133