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
|
/***************************************************************************************************
* 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 constant expressions for mapping GEMM problem size and strides onto pitch-linear
memory.
*/
#pragma once
#include <cutlass/matrix_traits.h>
#include <cutlass/reshape_tile.h>
#include <cutlass/util/platform.h>
namespace cutlass {
namespace gemm {
////////////////////////////////////////////////////////////////////////////////////////////////////
/// Helper to describe attributes of GEMM matrix operands
template <GemmOperand::Kind kOperand_, MatrixLayout::Kind kLayout_>
struct GemmOperandTraitsAb {
static const bool Congruous =
(kOperand_ == GemmOperand::kA ^ kLayout_ == MatrixLayout::kRowMajor);
};
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename GemmOperand::Kind kOperand_, typename Tile_>
struct GetExtent;
template <typename Tile_>
struct GetExtent<GemmOperand::kA, Tile_> {
static const int kExtent = Tile_::kW;
};
template <typename Tile_>
struct GetExtent<GemmOperand::kB, Tile_> {
static const int kExtent = Tile_::kH;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/// Determines the shape of a multiplicand tile in terms of strided (H) and contiguous (W)
/// dimensions
template <typename ThreadBlockTile_, GemmOperand::Kind Usage, MatrixLayout::Kind Layout>
struct GemmMultiplicandTraits {
// Only defined for A or B
static_assert(Usage == GemmOperand::kA || Usage == GemmOperand::kB,
"MultiplicandTileShape defined only for A or B operands.");
/// Shape of GEMM thread block tile (K, N, M)
typedef ThreadBlockTile_ ThreadBlockTile;
/// Identifies multiplicand
static GemmOperand::Kind const kUsage = Usage;
/// Layout of tile
static MatrixLayout::Kind const kLayout = Layout;
// True if K is the strided dimension
static bool const kKstrided = (kUsage == GemmOperand::kA ^ kLayout == MatrixLayout::kRowMajor);
/// Map the ThreadBlockShape onto (kH, kW) dimensions for A and B operand
typedef typename platform::conditional<
kKstrided,
Shape<1, ThreadBlockTile::kD, GetExtent<Usage, ThreadBlockTile>::kExtent>,
Shape<1, GetExtent<Usage, ThreadBlockTile>::kExtent, ThreadBlockTile::kD> >::type Shape;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/// Project's a coordinate (K, N, M) onto inner and outer dimensions defined for each
/// operand.
template <GemmOperand::Kind operand, bool Kstrided = true>
struct ProjectOperand;
/// Project A operand - (0, K, M)
template <bool Kstrided>
struct ProjectOperand<GemmOperand::kA, Kstrided> {
CUTLASS_HOST_DEVICE
static Coord<3> project(Coord<3> const &coord) {
if (Kstrided) {
return make_Coord(0, coord[0], coord[2]);
} else {
return make_Coord(0, coord[2], coord[0]);
}
}
};
/// Project B operand - (0, K, N)
template <bool Kstrided>
struct ProjectOperand<GemmOperand::kB, Kstrided> {
CUTLASS_HOST_DEVICE
static Coord<3> project(Coord<3> const &coord) {
if (Kstrided) {
return make_Coord(0, coord[0], coord[1]);
} else {
return make_Coord(0, coord[1], coord[0]);
}
}
};
/// Project C operand - (0, N, M)
template <>
struct ProjectOperand<GemmOperand::kC, true> {
CUTLASS_HOST_DEVICE
static Coord<3> project(Coord<3> const &coord) { return make_Coord(0, coord[1], coord[2]); }
};
/// Project D operand - (0, N, M)
template <>
struct ProjectOperand<GemmOperand::kD, true> {
CUTLASS_HOST_DEVICE
static Coord<3> project(Coord<3> const &coord) { return make_Coord(0, coord[1], coord[2]); }
};
////////////////////////////////////////////////////////////////////////////////////////////////////
} // namespace gemm
} // namespace cutlass
|
