CUTLASS
CUDA Templates for Linear Algebra Subroutines and Solvers
host/tensor_foreach.h
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25 #pragma once
26 
27 #include <stdexcept>
28 #include "cutlass/cutlass.h"
29 
30 namespace cutlass {
31 namespace reference {
32 namespace host {
33 
35 
37 namespace detail {
38 
40 template <typename Func, int Rank, int RankRemaining>
42 
44  static int const kActiveRank = Rank - RankRemaining - 1;
45 
48  Func &func,
49  Coord<Rank> const &extent,
50  Coord<Rank> &coord) {
51 
52  for (int i = 0; i < extent.at(kActiveRank); ++i) {
53  coord[kActiveRank] = i;
54  TensorForEachHelper<Func, Rank, RankRemaining - 1>(func, extent, coord);
55  }
56  }
57 };
58 
60 template <typename Func, int Rank>
61 struct TensorForEachHelper<Func, Rank, 0> {
62 
64  static int const kActiveRank = Rank - 1;
65 
68  Func &func,
69  Coord<Rank> const &extent,
70  Coord<Rank> &coord) {
71 
72  for (int i = 0; i < extent.at(kActiveRank); ++i) {
73  coord[kActiveRank] = i;
74  func(coord);
75  }
76  }
77 };
78 
79 } // namespace detail
80 
82 
84 template <
85  typename Func,
86  int Rank>
87 void TensorForEach(Coord<Rank> extent, Func & func) {
88  Coord<Rank> coord;
89  detail::TensorForEachHelper<Func, Rank, Rank - 1>(func, extent, coord);
90 }
91 
93 
95 template <
96  typename Func,
97  int Rank>
98 void TensorForEachLambda(Coord<Rank> extent, Func func) {
99  Coord<Rank> coord;
100  detail::TensorForEachHelper<Func, Rank, Rank - 1>(func, extent, coord);
101 }
102 
104 
105 template <typename Element, typename Func>
106 struct BlockForEach {
107 
110  Element *ptr,
111  size_t capacity,
112  typename Func::Params params = typename Func::Params()) {
113 
114  Func func(params);
115 
116  for (size_t index = 0; index < capacity; ++index) {
117  ptr[index] = func();
118  }
119  }
120 };
121 
123 
124 } // namespace host
125 } // namespace reference
126 } // namespace cutlass
127 
Definition: host/tensor_foreach.h:106
Definition: aligned_buffer.h:35
BlockForEach(Element *ptr, size_t capacity, typename Func::Params params=typename Func::Params())
Constructor performs the operation.
Definition: host/tensor_foreach.h:109
static int const kActiveRank
Index of the active rank.
Definition: host/tensor_foreach.h:44
TensorForEachHelper(Func &func, Coord< Rank > const &extent, Coord< Rank > &coord)
Constructor for general rank.
Definition: host/tensor_foreach.h:47
Helper to perform for-each operation.
Definition: host/tensor_foreach.h:41
TensorForEachHelper(Func &func, Coord< Rank > const &extent, Coord< Rank > &coord)
Constructor for fastest chaning rank.
Definition: host/tensor_foreach.h:67
Statically-sized array specifying Coords within a tensor.
Definition: coord.h:43
void TensorForEachLambda(Coord< Rank > extent, Func func)
Iterates over the index space of a tensor and calls a C++ lambda.
Definition: host/tensor_foreach.h:98
void TensorForEach(Coord< Rank > extent, Func &func)
Iterates over the index space of a tensor.
Definition: host/tensor_foreach.h:87
CUTLASS_HOST_DEVICE Index & at()
Gets the index of a given Coord element.
Definition: coord.h:255
Basic include for CUTLASS.