1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/***************************************************************************************************
* 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 a 1D vector of elements held in the registers of each thread.
*/
#pragma once
#if !defined(__CUDACC_RTC__) || defined(CUTLASS_NVRTC_HAS_FP16)
#include <cuda_fp16.h>
#endif
#include <cutlass/util/platform.h>
namespace cutlass {
////////////////////////////////////////////////////////////////////////////////////////////////////
template <size_t kAlignment_>
struct AlignedStruct {};
template <>
struct __align__(1) AlignedStruct<1>{};
template <>
struct __align__(2) AlignedStruct<2>{};
template <>
struct __align__(4) AlignedStruct<4>{};
template <>
struct __align__(8) AlignedStruct<8>{};
template <>
struct __align__(16) AlignedStruct<16>{};
template <>
struct __align__(32) AlignedStruct<32>{};
template <>
struct __align__(64) AlignedStruct<64>{};
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename Scalar_, int kLanes_>
union Vector {
/// The scalar type.
typedef Scalar_ Scalar;
/// The number of elements in the vector.
enum { kLanes = kLanes_ };
/// The size of the vector.
enum { kVectorSize = kLanes * (int)sizeof(Scalar) };
/// The number of registers needed to store the vector.
enum { kRegisters = kVectorSize < 4 ? 1 : kVectorSize / 4 };
// Make sure that the vector type makes sense.
static_assert(kVectorSize <= 16, "Vector type is too large");
/// The aligned storage to make sure we have good alignment.
AlignedStruct<kVectorSize> aligned_;
/// The associated array of scalars.
Scalar scalars[kLanes];
/// The data in registers.
uint32_t registers[kRegisters];
/// Accessor to the ith lane.
CUTLASS_DEVICE Scalar const& operator[](uint32_t i) const { return scalars[i]; }
/// Accessor to the ith lane.
CUTLASS_DEVICE Scalar& operator[](uint32_t i) { return scalars[i]; }
};
////////////////////////////////////////////////////////////////////////////////////////////////////
#if !defined(__CUDACC_RTC__) || defined(CUTLASS_NVRTC_HAS_FP16)
template <int kLanes_>
union Vector<half, kLanes_> {
/// The scalar type.
typedef half Scalar;
/// The number of elements in the vector.
enum { kLanes = kLanes_ };
/// The size of the vector.
enum { kVectorSize = kLanes * (int)sizeof(Scalar) };
/// The number of registers needed to store the vector.
enum { kRegisters = kVectorSize < 4 ? 1 : kVectorSize / 4 };
// Make sure that the vector type makes sense.
static_assert(kVectorSize <= size_t(16), "Vector type is too large");
/// The aligned storage to make sure we have good alignment.
AlignedStruct<kVectorSize> aligned_;
/// The associated array of scalars.
uint16_t scalars[kLanes];
/// The data in registers.
uint32_t registers[kRegisters];
/// Accessor to the ith lane.
CUTLASS_DEVICE Scalar const& operator[](uint32_t i) const {
return reinterpret_cast<Scalar const&>(scalars[i]);
}
/// Accessor to the ith lane.
CUTLASS_DEVICE Scalar& operator[](uint32_t i) { return reinterpret_cast<Scalar&>(scalars[i]); }
};
#endif
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename Scalar_>
CUTLASS_DEVICE void make_zero(Scalar_& x) {
x = Scalar_(0);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename Element_, int kLanes_ = 1>
struct Vectorize {
typedef Vector<Element_, kLanes_> Type;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename Element_>
struct Vectorize<Element_, 1> {
typedef Element_ Type;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename Scalar_, int kLanes_>
CUTLASS_DEVICE void make_zero(Vector<Scalar_, kLanes_>& vec) {
for (int i = 0; i < Vector<Scalar_, kLanes_>::kRegisters; ++i) {
vec.registers[i] = 0;
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
//
// cutlass::Extent similar to std::extent but applicable to CUTLASS types
//
/// Returns the extent of a scalar or vector
template <typename T>
struct Extent {
static size_t const kValue = 1;
};
/// Returns the number of lanes of a vector if need be
template <typename T, int Lanes>
struct Extent<Vector<T, Lanes> > {
static size_t const kValue = Lanes;
};
/// Returns the number of lanes of a vector if need be
template <typename T, int Lanes>
struct Extent<Vector<T, Lanes> const> {
static size_t const kValue = Lanes;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/// Traits describing properties of vectors and scalar-as-vectors
template <typename T>
struct VectorTraits {
/// Scalar type
typedef T Scalar;
/// Number of lanes of vector
static int const kLanes = 1;
/// True if the type is actually a cutlass::Vector, otherwise false
static bool const IsVector = false;
/// Type that is always a vector
typedef Vector<T, 1> Vector;
};
/// Partial specialization for actual cutlass::Vector
template <typename T, int Lanes>
struct VectorTraits<Vector<T, Lanes> > {
/// Scalar type
typedef T Scalar;
/// Number of lanes of vector
static int const kLanes = Lanes;
/// Type is actually a cutlass::Vector
static bool const IsVector = true;
/// Type that is always a Vector
typedef Vector<T, Lanes> Vector;
};
/// Partial specialization for actual cutlass::Vector
template <typename T, int Lanes>
struct VectorTraits<Vector<T, Lanes> const> {
/// Scalar type
typedef T Scalar;
/// Number of lanes of vector
static int const kLanes = Lanes;
/// Type is actually a cutlass::Vector
static bool const IsVector = true;
/// Type that is always a Vector
typedef Vector<T, Lanes> Vector;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
} // namespace cutlass
|
