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Allowed tensor contraction operation with an empty array of dimension pairs, which performs a tensor product.

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This commit is contained in:
Godeffroy Valet 2015-07-25 11:58:36 +02:00
parent 4b3052c54d
commit 2195822df6
2 changed files with 43 additions and 14 deletions
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30
unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
View File

@ -66,7 +66,7 @@ class BaseTensorContractionMapper {
const bool left = (side == Lhs);
Index nocontract_val = left ? row : col;
Index linidx = 0;
for (int i = array_size<nocontract_t>::value - 1; i > 0; i--) {
for (int i = static_cast<int>(array_size<nocontract_t>::value) - 1; i > 0; i--) {
const Index idx = nocontract_val / m_ij_strides[i];
linidx += idx * m_nocontract_strides[i];
nocontract_val -= idx * m_ij_strides[i];
@ -81,17 +81,19 @@ class BaseTensorContractionMapper {
}
Index contract_val = left ? col : row;
for (int i = array_size<contract_t>::value - 1; i > 0; i--) {
for (int i = static_cast<int>(array_size<contract_t>::value) - 1; i > 0; i--) {
const Index idx = contract_val / m_k_strides[i];
linidx += idx * m_contract_strides[i];
contract_val -= idx * m_k_strides[i];
}
EIGEN_STATIC_ASSERT(array_size<contract_t>::value > 0, YOU_MADE_A_PROGRAMMING_MISTAKE);
if (side == Rhs && inner_dim_contiguous) {
eigen_assert(m_contract_strides[0] == 1);
linidx += contract_val;
} else {
linidx += contract_val * m_contract_strides[0];
if(array_size<contract_t>::value > 0) {
if (side == Rhs && inner_dim_contiguous) {
eigen_assert(m_contract_strides[0] == 1);
linidx += contract_val;
} else {
linidx += contract_val * m_contract_strides[0];
}
}
return linidx;
@ -102,7 +104,7 @@ class BaseTensorContractionMapper {
const bool left = (side == Lhs);
Index nocontract_val[2] = {left ? row : col, left ? row + distance : col};
Index linidx[2] = {0, 0};
for (int i = array_size<nocontract_t>::value - 1; i > 0; i--) {
for (int i = static_cast<int>(array_size<nocontract_t>::value) - 1; i > 0; i--) {
const Index idx0 = nocontract_val[0] / m_ij_strides[i];
const Index idx1 = nocontract_val[1] / m_ij_strides[i];
linidx[0] += idx0 * m_nocontract_strides[i];
@ -122,7 +124,7 @@ class BaseTensorContractionMapper {
}
Index contract_val[2] = {left ? col : row, left ? col : row + distance};
for (int i = array_size<contract_t>::value - 1; i > 0; i--) {
for (int i = static_cast<int>(array_size<contract_t>::value) - 1; i > 0; i--) {
const Index idx0 = contract_val[0] / m_k_strides[i];
const Index idx1 = contract_val[1] / m_k_strides[i];
linidx[0] += idx0 * m_contract_strides[i];
@ -130,7 +132,7 @@ class BaseTensorContractionMapper {
contract_val[0] -= idx0 * m_k_strides[i];
contract_val[1] -= idx1 * m_k_strides[i];
}
EIGEN_STATIC_ASSERT(array_size<contract_t>::value > 0, YOU_MADE_A_PROGRAMMING_MISTAKE);
if (side == Rhs && inner_dim_contiguous) {
eigen_assert(m_contract_strides[0] == 1);
linidx[0] += contract_val[0];
@ -509,8 +511,6 @@ struct TensorContractionEvaluatorBase
static_cast<int>(TensorEvaluator<RightArgType, Device>::Layout)),
YOU_MADE_A_PROGRAMMING_MISTAKE);
eigen_assert((internal::array_size<contract_t>::value > 0) && "Must contract on some indices");
DSizes<Index, LDims> eval_left_dims;
DSizes<Index, RDims> eval_right_dims;
@ -558,7 +558,9 @@ struct TensorContractionEvaluatorBase
m_i_strides[0] = 1;
m_j_strides[0] = 1;
m_k_strides[0] = 1;
if(ContractDims) {
m_k_strides[0] = 1;
}
m_i_size = 1;
m_j_size = 1;

27
unsupported/test/cxx11_tensor_contraction.cpp
View File

@ -448,6 +448,31 @@ static void test_small_blocking_factors()
}
}
template<int DataLayout>
static void test_tensor_product()
{
Tensor<float, 2, DataLayout> mat1(2, 3);
Tensor<float, 2, DataLayout> mat2(4, 1);
mat1.setRandom();
mat2.setRandom();
Tensor<float, 4, DataLayout> result = mat1.contract(mat2, Eigen::array<DimPair, 0>{{}});
VERIFY_IS_EQUAL(result.dimension(0), 2);
VERIFY_IS_EQUAL(result.dimension(1), 3);
VERIFY_IS_EQUAL(result.dimension(2), 4);
VERIFY_IS_EQUAL(result.dimension(3), 1);
for (int i = 0; i < result.dimension(0); ++i) {
for (int j = 0; j < result.dimension(1); ++j) {
for (int k = 0; k < result.dimension(2); ++k) {
for (int l = 0; l < result.dimension(3); ++l) {
VERIFY_IS_APPROX(result(i, j, k, l), mat1(i, j) * mat2(k, l) );
}
}
}
}
}
void test_cxx11_tensor_contraction()
{
@ -477,4 +502,6 @@ void test_cxx11_tensor_contraction()
CALL_SUBTEST(test_tensor_vector<RowMajor>());
CALL_SUBTEST(test_small_blocking_factors<ColMajor>());
CALL_SUBTEST(test_small_blocking_factors<RowMajor>());
CALL_SUBTEST(test_tensor_product<ColMajor>());
CALL_SUBTEST(test_tensor_product<RowMajor>());
}