blob: e8c7c6d14ac0627697330f61cf6ae8526fed1abd (
plain)
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
|
//
// This confidential and proprietary software may be used only as
// authorised by a licensing agreement from ARM Limited
// (C) COPYRIGHT 2020-2024 ARM Limited
// ALL RIGHTS RESERVED
// The entire notice above must be reproduced on all authorised
// copies and copies may only be made to the extent permitted
// by a licensing agreement from ARM Limited.
// Convert tensor index coordinates to an element offset
size_t tensor_index_to_offset(shape_t shape, shape_t index) {
size_t size = tensor_size(shape); // check tensor shape is valid
size_t offset = 0;
for (int32_t i = 0; i < rank(shape); i++) {
REQUIRE(index[i] >= 0 && index[i] < shape[i]);
offset = offset * shape[i] + index[i];
}
return offset;
}
// Convert an element offset to tensor index coordinates
shape_t tensor_offset_to_index(shape_t shape, size_t offset) {
size_t size = tensor_size(shape); // check tensor shape is valid
REQUIRE(offset < size);
shape_t index(rank(shape)); // index has rank(shape) indicies
for(int32_t i = rank(shape) - 1; i >= 0; i--) {
index[i] = offset % shape[i];
offset /= shape[i];
}
return index;
}
// Check the tensor shape is valid and return the tensor size in elements
size_t tensor_size(shape_t shape) {
size_t size = 1;
for (int32_t i = 0; i < rank(shape); i++) {
REQUIRE(1 <= shape[i] && shape[i] <= maximum<size_t> / size);
size *= shape[i];
}
return size;
}
// Return the size of the tensor in the given axis
// For a rank=0 tensor, returns 1 for all axes
size_t shape_dim(shape_t shape, int axis) {
return (axis >= rank(shape)) ? 1 : shape[axis];
}
|
