1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10 #include "main.h"
11
12 template<typename Scalar>
test_first_aligned_helper(Scalar * array,int size)13 void test_first_aligned_helper(Scalar *array, int size)
14 {
15 const int packet_size = sizeof(Scalar) * internal::packet_traits<Scalar>::size;
16 VERIFY(((size_t(array) + sizeof(Scalar) * internal::first_aligned(array, size)) % packet_size) == 0);
17 }
18
19 template<typename Scalar>
test_none_aligned_helper(Scalar * array,int size)20 void test_none_aligned_helper(Scalar *array, int size)
21 {
22 EIGEN_UNUSED_VARIABLE(array);
23 EIGEN_UNUSED_VARIABLE(size);
24 VERIFY(internal::packet_traits<Scalar>::size == 1 || internal::first_aligned(array, size) == size);
25 }
26
27 struct some_non_vectorizable_type { float x; };
28
test_first_aligned()29 void test_first_aligned()
30 {
31 EIGEN_ALIGN16 float array_float[100];
32 test_first_aligned_helper(array_float, 50);
33 test_first_aligned_helper(array_float+1, 50);
34 test_first_aligned_helper(array_float+2, 50);
35 test_first_aligned_helper(array_float+3, 50);
36 test_first_aligned_helper(array_float+4, 50);
37 test_first_aligned_helper(array_float+5, 50);
38
39 EIGEN_ALIGN16 double array_double[100];
40 test_first_aligned_helper(array_double, 50);
41 test_first_aligned_helper(array_double+1, 50);
42 test_first_aligned_helper(array_double+2, 50);
43
44 double *array_double_plus_4_bytes = (double*)(size_t(array_double)+4);
45 test_none_aligned_helper(array_double_plus_4_bytes, 50);
46 test_none_aligned_helper(array_double_plus_4_bytes+1, 50);
47
48 some_non_vectorizable_type array_nonvec[100];
49 test_first_aligned_helper(array_nonvec, 100);
50 test_none_aligned_helper(array_nonvec, 100);
51 }
52