cxx11_tensor_inflation.cpp File Reference

#include "main.h"
#include <Eigen/CXX11/Tensor>

Functions
template<int DataLayout>
static void	test_simple_inflation ()
	EIGEN_DECLARE_TEST (cxx11_tensor_inflation)

Function Documentation

EIGEN_DECLARE_TEST()

EIGEN_DECLARE_TEST

(

cxx11_tensor_inflation

)

                                           {
  CALL_SUBTEST(test_simple_inflation<ColMajor>());
  CALL_SUBTEST(test_simple_inflation<RowMajor>());
}

References CALL_SUBTEST.

test_simple_inflation()

template<int DataLayout>

static void test_simple_inflation ( )

static

                                    {
  Tensor<float, 4, DataLayout> tensor(2, 3, 5, 7);
  tensor.setRandom();
  array<ptrdiff_t, 4> strides;
 
  strides[0] = 1;
  strides[1] = 1;
  strides[2] = 1;
  strides[3] = 1;
 
  Tensor<float, 4, DataLayout> no_stride;
  no_stride = tensor.inflate(strides);
 
  VERIFY_IS_EQUAL(no_stride.dimension(0), 2);
  VERIFY_IS_EQUAL(no_stride.dimension(1), 3);
  VERIFY_IS_EQUAL(no_stride.dimension(2), 5);
  VERIFY_IS_EQUAL(no_stride.dimension(3), 7);
 
  for (int i = 0; i < 2; ++i) {
    for (int j = 0; j < 3; ++j) {
      for (int k = 0; k < 5; ++k) {
        for (int l = 0; l < 7; ++l) {
          VERIFY_IS_EQUAL(tensor(i, j, k, l), no_stride(i, j, k, l));
        }
      }
    }
  }
 
  strides[0] = 2;
  strides[1] = 4;
  strides[2] = 2;
  strides[3] = 3;
  Tensor<float, 4, DataLayout> inflated;
  inflated = tensor.inflate(strides);
 
  VERIFY_IS_EQUAL(inflated.dimension(0), 3);
  VERIFY_IS_EQUAL(inflated.dimension(1), 9);
  VERIFY_IS_EQUAL(inflated.dimension(2), 9);
  VERIFY_IS_EQUAL(inflated.dimension(3), 19);
 
  for (int i = 0; i < 3; ++i) {
    for (int j = 0; j < 9; ++j) {
      for (int k = 0; k < 9; ++k) {
        for (int l = 0; l < 19; ++l) {
          if (i % 2 == 0 && j % 4 == 0 && k % 2 == 0 && l % 3 == 0) {
            VERIFY_IS_EQUAL(inflated(i, j, k, l), tensor(i / 2, j / 4, k / 2, l / 3));
          } else {
            VERIFY_IS_EQUAL(0, inflated(i, j, k, l));
          }
        }
      }
    }
  }
}

References Eigen::Tensor< Scalar_, NumIndices_, Options_, IndexType_ >::dimension(), i, j, k, Eigen::TensorBase< Derived, AccessLevel >::setRandom(), Eigen::internal::strides(), and VERIFY_IS_EQUAL.