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
|
// =================================================================================================
// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
// width of 100 characters per line.
//
// Author(s):
// Cedric Nugteren <www.cedricnugteren.nl>
//
// This file contains the Xher kernels for rank-1 matrix update.
//
// =================================================================================================
// Enables loading of this file using the C++ pre-processor's #include (C++11 standard raw string
// literal). Comment-out this line for syntax-highlighting when developing.
R"(
// =================================================================================================
// Symmetric version of the rank-1 matrix update kernel (HER, HPR, SYR, SPR)
__kernel __attribute__((reqd_work_group_size(WGS1, WGS2, 1)))
void Xher(const int n,
const real_arg arg_alpha,
const __global real* restrict xgm, const int x_offset, const int x_inc,
__global real* restrict agm, const int a_offset, const int a_ld,
const int is_upper, const int is_rowmajor) {
const real alpha = GetRealArg(arg_alpha);
// Register storage for X and XT
#pragma promote_to_registers
real xvalues[WPT];
#pragma promote_to_registers
real xtvalues[WPT];
// Loads the X-vector
#pragma unroll
for (int _w = 0; _w < WPT; _w += 1) {
const int id2 = _w*get_global_size(1) + get_global_id(1);
xvalues[_w] = LoadVector(id2, n, xgm, x_offset, x_inc, !is_rowmajor);
}
// Loads the X-transposed-vector
#pragma unroll
for (int _w = 0; _w < WPT; _w += 1) {
const int id1 = _w*get_global_size(0) + get_global_id(0);
xtvalues[_w] = LoadVector(id1, n, xgm, x_offset, x_inc, is_rowmajor);
}
// Loops over the work per thread twice
#pragma unroll
for (int _w1 = 0; _w1 < WPT; _w1 += 1) {
#pragma unroll
for (int _w2 = 0; _w2 < WPT; _w2 += 1) {
// Global thread IDs
const int id1 = _w1*get_global_size(0) + get_global_id(0);
const int id2 = _w2*get_global_size(1) + get_global_id(1);
// Skip these threads if they do not contain threads contributing to the matrix-triangle
if ((is_upper && (id1 > id2)) || (!is_upper && (id2 > id1))) {
// Do nothing
}
// Loads A, performs the operation, and stores the result into A
else {
MatrixUpdate(id1, id2, n, n, agm, a_offset, a_ld, alpha, xvalues[_w2], xtvalues[_w1], is_upper);
}
}
}
}
// =================================================================================================
// End of the C++11 raw string literal
)"
// =================================================================================================
|
