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
|
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "adio.h"
#include "adio_extern.h"
int ADIO_Type_create_subarray(int ndims,
int *array_of_sizes,
int *array_of_subsizes,
int *array_of_starts,
int order,
MPI_Datatype oldtype,
MPI_Datatype *newtype)
{
MPI_Aint extent, disp, size, lb, ub;
int i, blklen;
MPI_Datatype tmp1, tmp2, inttype;
MPI_Type_get_extent(oldtype, &lb, &extent);
if (order == MPI_ORDER_FORTRAN) {
/* dimension 0 changes fastest */
if (ndims == 1) {
MPI_Type_contiguous(array_of_subsizes[0], oldtype, &tmp1);
}
else {
MPI_Type_vector(array_of_subsizes[1],
array_of_subsizes[0],
array_of_sizes[0], oldtype, &tmp1);
size = (MPI_Aint)array_of_sizes[0]*extent;
for (i=2; i<ndims; i++) {
size *= (MPI_Aint)array_of_sizes[i-1];
MPI_Type_create_hvector(array_of_subsizes[i], 1, size, tmp1, &tmp2);
MPI_Type_free(&tmp1);
tmp1 = tmp2;
}
}
/* add displacement and UB */
disp = array_of_starts[0];
size = 1;
for (i=1; i<ndims; i++) {
size *= (MPI_Aint)array_of_sizes[i-1];
disp += size*(MPI_Aint)array_of_starts[i];
}
/* rest done below for both Fortran and C order */
}
else /* order == MPI_ORDER_C */ {
/* dimension ndims-1 changes fastest */
if (ndims == 1) {
MPI_Type_contiguous(array_of_subsizes[0], oldtype, &tmp1);
}
else {
MPI_Type_vector(array_of_subsizes[ndims-2],
array_of_subsizes[ndims-1],
array_of_sizes[ndims-1], oldtype, &tmp1);
size = (MPI_Aint)array_of_sizes[ndims-1]*extent;
for (i=ndims-3; i>=0; i--) {
size *= (MPI_Aint)array_of_sizes[i+1];
MPI_Type_create_hvector(array_of_subsizes[i], 1, size, tmp1, &tmp2);
MPI_Type_free(&tmp1);
tmp1 = tmp2;
}
}
/* add displacement and UB */
disp = array_of_starts[ndims-1];
size = 1;
for (i=ndims-2; i>=0; i--) {
size *= (MPI_Aint)array_of_sizes[i+1];
disp += size*(MPI_Aint)array_of_starts[i];
}
}
disp *= extent;
ub = extent;
for (i=0; i<ndims; i++) ub *= (MPI_Aint)array_of_sizes[i];
blklen = 1;
MPI_Type_create_struct(1, &blklen, &disp, &tmp1, &inttype);
MPI_Type_create_resized (inttype, 0, ub, newtype);
MPI_Type_free(&inttype);
MPI_Type_free(&tmp1);
return MPI_SUCCESS;
}
|
