ground/gcs/src/libs/eigen/test/first_aligned.cpp

   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>
  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>
  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
  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 }