void hyperbolic_tangent_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id) const
{
if (offset_input_entry_id > 0)
throw neural_network_exception("hyperbolic_tangent_layer_updater_plain is not able to run using offset");
const int elem_count = static_cast<int>(updater_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::const_iterator in_it = input_buffer->begin();
const std::vector<float>::iterator out_it = output_buffer->begin();
nnforge_shared_ptr<const hyperbolic_tangent_layer> layer_derived = nnforge_dynamic_pointer_cast<const hyperbolic_tangent_layer>(layer_schema);
const float hyperbolic_tangent_steepness2 = layer_derived->steepness * 2.0F;
const float hyperbolic_tangent_major_multiplier = layer_derived->major_multiplier;
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
{
float inp = *(in_it + i);
float inp2 = expf(inp * hyperbolic_tangent_steepness2);
float res = (inp2 - 1.0F) / (inp2 + 1.0F) * hyperbolic_tangent_major_multiplier;
*(out_it + i) = res;
}
}
void softmax_layer_hessian_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int entry_count) const
{
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int feature_map_count = static_cast<unsigned int>(input_configuration_specific.feature_map_count);
const std::vector<float>::const_iterator input_buffer_it = input_buffer->begin();
const std::vector<float>::iterator output_buffer_it = output_buffer->begin();
const int total_workload = entry_count * input_neuron_count_per_feature_map;
const int openmp_thread_count = plain_config->openmp_thread_count;
#pragma omp parallel default(none) shared(additional_buffers) num_threads(openmp_thread_count)
{
int thread_id = 0;
#ifdef _OPENMP
thread_id = omp_get_thread_num();
#endif
std::vector<float>& local_additional_buffer = *(additional_buffers[thread_id]);
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int entry_id = workload_id / input_neuron_count_per_feature_map;
int neuron_id = workload_id - (entry_id * input_neuron_count_per_feature_map);
const std::vector<float>::const_iterator in_it = input_buffer_it + (entry_id * input_neuron_count) + neuron_id;
const std::vector<float>::iterator out_it = output_buffer_it + (entry_id * input_neuron_count) + neuron_id;
float max_val = -1.0e+37F;
for(unsigned int feature_map_id = 0; feature_map_id < feature_map_count; ++feature_map_id)
{
float val = *(in_it + (feature_map_id * input_neuron_count_per_feature_map));
max_val = std::max(max_val, val);
}
float sum = 0.0F;
for(unsigned int feature_map_id = 0; feature_map_id < feature_map_count; ++feature_map_id)
{
float val = expf((*(in_it + (feature_map_id * input_neuron_count_per_feature_map))) - max_val);
sum += val;
local_additional_buffer[feature_map_id] = val;
}
float mult = 1.0F / sum;
for(unsigned int feature_map_id = 0; feature_map_id < feature_map_count; ++feature_map_id)
*(out_it + (feature_map_id * input_neuron_count_per_feature_map)) = local_additional_buffer[feature_map_id] * mult;
} // for(int workload_id
} // #pragma parallel
}
void hyperbolic_tangent_layer_updater_plain::backprop(
additional_buffer_smart_ptr input_errors,
const_additional_buffer_smart_ptr input_neurons,
const_additional_buffer_smart_ptr output_errors,
const_additional_buffer_smart_ptr output_neurons,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count) const
{
const int elem_count = static_cast<int>(updater_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::iterator in_err_it = input_errors->begin();
const std::vector<float>::const_iterator out_it = output_neurons->begin();
nnforge_shared_ptr<const hyperbolic_tangent_layer> layer_derived = nnforge_dynamic_pointer_cast<const hyperbolic_tangent_layer>(layer_schema);
const float hyperbolic_tangent_major_multiplier_reverse = 1.0F / layer_derived->major_multiplier;
const float hyperbolic_tangent_steepness3 = layer_derived->steepness * layer_derived->major_multiplier;
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
{
float out_neuron = *(out_it + i);
float normalized_value = out_neuron * hyperbolic_tangent_major_multiplier_reverse;
float der1st = hyperbolic_tangent_steepness3 * (1.0F - (normalized_value * normalized_value));
*(in_err_it + i) *= der1st;
}
}
void absolute_layer_updater_plain::backprop(
additional_buffer_smart_ptr input_errors,
const_additional_buffer_smart_ptr input_neurons,
const_additional_buffer_smart_ptr output_errors,
const_additional_buffer_smart_ptr output_neurons,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count) const
{
const int elem_count = static_cast<int>(updater_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::const_iterator in_it = input_neurons->begin();
const std::vector<float>::iterator in_err_it = input_errors->begin();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
{
float val = *(in_it + i);
if (val < 0.0F)
{
*(in_err_it + i) = - *(in_err_it + i);
}
}
}
void absolute_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id,
bool force_deterministic) const
{
if (offset_input_entry_id > 0)
throw neural_network_exception("absolute_layer_updater_plain is not able to run using offset");
const int elem_count = static_cast<int>(updater_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::const_iterator in_it = input_buffer->begin();
const std::vector<float>::iterator out_it = output_buffer->begin();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
*(out_it + i) = fabs(*(in_it + i));
}
void sigmoid_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const layer_data_list& data,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
int offset_input_entry_id) const
{
if (offset_input_entry_id >= 0)
throw neural_network_exception("sigmoid_layer_updater_plain is not able to run using the same input");
const int elem_count = static_cast<int>(updater_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::const_iterator in_it = input_buffer->begin();
const std::vector<float>::iterator out_it = output_buffer->begin();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
{
float inp = *(in_it + i);
float res = 1.0F / (expf(-inp) + 1.0F);
*(out_it + i) = res;
}
}
void dropout_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id,
bool force_deterministic) const
{
if (offset_input_entry_id > 0)
throw neural_network_exception("dropout_layer_updater_plain is not able to run using offset");
if (force_deterministic)
{
memcpy(&(output_buffer->at(0)), &(input_buffer->at(0)), input_configuration_specific.get_neuron_count() * updater_count * sizeof(float));
}
else
{
const std::vector<float>::const_iterator in_it_global = input_buffer->begin();
const std::vector<float>::iterator out_it_global = output_buffer->begin();
unsigned char * keep_elem_ptr = reinterpret_cast<unsigned char *>(&(additional_buffers[0]->at(0)));
nnforge_shared_ptr<const dropout_layer> layer_derived = nnforge_dynamic_pointer_cast<const dropout_layer>(layer_schema);
const float dropout_rate = layer_derived->dropout_rate;
const float keep_rate = 1.0F - dropout_rate;
const float mult = 1.0F / keep_rate;
const int total_workload = input_configuration_specific.get_neuron_count() * updater_count;
nnforge_uniform_real_distribution<float> dist(0.0F, 1.0F);
for(int i = 0; i < total_workload; ++i)
keep_elem_ptr[i] = (dist(gen) <= keep_rate ? (unsigned char)1 : (unsigned char)0);
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count) shared(keep_elem_ptr)
{
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int elem_id = workload_id;
*(out_it_global + elem_id) = *(in_it_global + elem_id) * (keep_elem_ptr[elem_id] ? mult : 0.0F);
}
}
}
}
void sigmoid_layer_hessian_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int entry_count) const
{
const int elem_count = static_cast<int>(entry_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::const_iterator in_it = input_buffer->begin();
const std::vector<float>::iterator out_it = output_buffer->begin();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
{
float inp = *(in_it + i);
float res = 1.0F / (expf(-inp) + 1.0F);
*(out_it + i) = res;
}
}
void max_subsampling_layer_updater_plain::backprop(
additional_buffer_smart_ptr input_errors,
const_additional_buffer_smart_ptr input_neurons,
const_additional_buffer_smart_ptr output_errors,
const_additional_buffer_smart_ptr output_neurons,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
bool force_deterministic) const
{
const std::vector<float>::iterator in_err_it_global = input_errors->begin();
const std::vector<float>::const_iterator out_err_it_global = output_errors->begin();
const std::vector<float>::const_iterator max_indexes_it_global = additional_buffers[0]->begin();
const int total_clean_workload = updater_count * input_configuration_specific.get_neuron_count();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int workload_id = 0; workload_id < total_clean_workload; ++workload_id)
{
*(in_err_it_global + workload_id) = 0.0F;
}
const int total_workload = updater_count * output_configuration_specific.get_neuron_count();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
unsigned int max_index = *(((unsigned int *)(&(*max_indexes_it_global))) + workload_id);
float err = *(out_err_it_global + workload_id);
*(in_err_it_global + max_index) = err;
}
}
void sigmoid_layer_hessian_plain::backprop(
additional_buffer_smart_ptr input_errors,
const_additional_buffer_smart_ptr output_errors,
const_additional_buffer_smart_ptr output_neurons,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int entry_count) const
{
const int elem_count = static_cast<int>(entry_count * input_configuration_specific.get_neuron_count());
const std::vector<float>::iterator in_err_it = input_errors->begin();
const std::vector<float>::const_iterator out_it = output_neurons->begin();
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int i = 0; i < elem_count; ++i)
{
float out_neuron = *(out_it + i);
float der1st = out_neuron * (1.0F - out_neuron);
*(in_err_it + i) *= (der1st * der1st);
}
}
void convolution_layer_hessian_plain::update_hessian(
const_additional_buffer_smart_ptr input_neurons,
const_additional_buffer_smart_ptr output_errors,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
layer_data_smart_ptr hessian_data,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int entry_count) const
{
const std::vector<float>::const_iterator in_it_global = input_neurons->begin();
const std::vector<float>::const_iterator out_err_it_global = output_errors->begin();
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
std::tr1::shared_ptr<const convolution_layer> layer_derived = std::tr1::dynamic_pointer_cast<const convolution_layer>(layer_schema);
const std::vector<unsigned int>& window_sizes = layer_derived->window_sizes;
const unsigned int dimension_count = static_cast<unsigned int>(window_sizes.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
unsigned int window_elem_count = 1;
for(unsigned int i = 0; i < dimension_count; ++i)
window_elem_count *= window_sizes[i];
const unsigned int const_window_elem_count = window_elem_count;
const std::vector<float>::iterator weights = (*hessian_data)[0].begin();
const std::vector<float>::iterator biases = (*hessian_data)[1].begin();
std::vector<unsigned int> current_local_input_position(dimension_count, 0);
std::vector<unsigned int> offset_list(window_elem_count);
for(unsigned int i = 1; i < window_elem_count; ++i)
{
int offset = 0;
for(unsigned int j = 0; j < dimension_count; ++j)
{
offset += static_cast<int>(input_slices[j]);
if ((++current_local_input_position[j]) < window_sizes[j])
{
offset_list[i] = offset_list[i-1] + offset;
break;
}
current_local_input_position[j] = 0;
offset -= static_cast<int>(window_sizes[j] * input_slices[j]);
}
}
const unsigned int output_feature_map_count = output_configuration_specific.feature_map_count;
const unsigned int input_feature_map_count = input_configuration_specific.feature_map_count;
const int total_workload = output_feature_map_count * input_feature_map_count;
const unsigned int const_entry_count = entry_count;
const std::vector<unsigned int>::const_iterator output_dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator offset_list_it = offset_list.begin();
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count)
{
std::tr1::array<unsigned int, max_dimension_count> current_output_position;
std::vector<float> weights_global(const_window_elem_count, 0.0F);
std::vector<float> weights_local(const_window_elem_count, 0.0F);
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int output_feature_map_id = workload_id / input_feature_map_count;
int input_feature_map_id = workload_id - (output_feature_map_id * input_feature_map_count);
std::vector<float>::const_iterator in_it_base = in_it_global + (input_feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::const_iterator out_err_it_base = out_err_it_global + (output_feature_map_id * output_neuron_count_per_feature_map);
std::vector<float>::iterator weights_it_base = weights + (output_feature_map_id * (const_window_elem_count * input_feature_map_count)) + (const_window_elem_count * input_feature_map_id);
std::fill_n(weights_global.begin(), const_window_elem_count, 0.0F);
for(unsigned int entry_id = 0; entry_id < const_entry_count; ++entry_id)
{
std::vector<float>::const_iterator in_it_base2 = in_it_base + (entry_id * input_neuron_count);
std::vector<float>::const_iterator out_err_it_base2 = out_err_it_base + (entry_id * output_neuron_count);
std::fill_n(current_output_position.begin(), dimension_count, 0);
std::fill_n(weights_local.begin(), const_window_elem_count, 0.0F);
for(std::vector<float>::const_iterator out_err_it = out_err_it_base2; out_err_it != out_err_it_base2 + output_neuron_count_per_feature_map; ++out_err_it)
{
std::vector<float>::const_iterator in_it = in_it_base2;
for(unsigned int i = 0; i < dimension_count; ++i)
in_it += current_output_position[i] * (*(input_slices_it + i));
float current_err = *out_err_it;
for(unsigned int i = 0; i < const_window_elem_count; ++i)
{
float in_neuron = *(in_it + *(offset_list_it + i));
weights_local[i] += (in_neuron * in_neuron * current_err);
}
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *(output_dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
std::vector<float>::iterator weights_local_it = weights_local.begin();
for(std::vector<float>::iterator it = weights_global.begin(); it != weights_global.end(); ++it, ++weights_local_it)
*it += *weights_local_it;
}
std::vector<float>::iterator weights_global_it = weights_global.begin();
for(std::vector<float>::iterator it = weights_it_base; it != weights_it_base + const_window_elem_count; ++it, ++weights_global_it)
*it += *weights_global_it;
}
}
const int total_workload_bias = output_feature_map_count;
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int workload_id = 0; workload_id < total_workload_bias; ++workload_id)
{
unsigned int output_feature_map_id = workload_id;
std::vector<float>::const_iterator out_err_it_base = out_err_it_global + (output_feature_map_id * output_neuron_count_per_feature_map);
float sum = 0.0F;
for(unsigned int entry_id = 0; entry_id < const_entry_count; ++entry_id)
{
std::vector<float>::const_iterator out_err_it_base2 = out_err_it_base + (entry_id * output_neuron_count);
float sum_local = 0.0F;
for(std::vector<float>::const_iterator out_err_it = out_err_it_base2; out_err_it != out_err_it_base2 + output_neuron_count_per_feature_map; ++out_err_it)
sum_local += *out_err_it;
sum += sum_local;
}
*(biases + output_feature_map_id) += sum;
}
}
void sparse_convolution_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id) const
{
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
const std::vector<float>::const_iterator in_it_global = input_buffer->begin() + input_neuron_count * offset_input_entry_id;
const std::vector<float>::iterator out_it_global = output_buffer->begin();
nnforge_shared_ptr<const sparse_convolution_layer> layer_derived = nnforge_dynamic_pointer_cast<const sparse_convolution_layer>(layer_schema);
const std::vector<unsigned int>& window_sizes = layer_derived->window_sizes;
const unsigned int dimension_count = static_cast<unsigned int>(window_sizes.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
unsigned int window_elem_count = 1;
for(unsigned int i = 0; i < dimension_count; ++i)
window_elem_count *= window_sizes[i];
const unsigned int const_window_elem_count = window_elem_count;
const std::vector<float>::const_iterator weights = (*data)[0].begin();
const std::vector<float>::const_iterator biases = (*data)[1].begin();
const std::vector<int>::const_iterator column_indices = (*data_custom)[0].begin();
const std::vector<int>::const_iterator row_indices = (*data_custom)[1].begin();
std::vector<unsigned int> current_local_input_position(dimension_count, 0);
std::vector<unsigned int> offset_list(window_elem_count);
for(unsigned int i = 1; i < window_elem_count; ++i)
{
int offset = 0;
for(unsigned int j = 0; j < dimension_count; ++j)
{
offset += static_cast<int>(input_slices[j]);
if ((++current_local_input_position[j]) < window_sizes[j])
{
offset_list[i] = offset_list[i-1] + offset;
break;
}
current_local_input_position[j] = 0;
offset -= static_cast<int>(window_sizes[j] * input_slices[j]);
}
}
const unsigned int output_feature_map_count = output_configuration_specific.feature_map_count;
const unsigned int input_feature_map_count = input_configuration_specific.feature_map_count;
const int total_workload = updater_count * output_feature_map_count;
const std::vector<unsigned int>::const_iterator output_dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator offset_list_it = offset_list.begin();
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count)
{
nnforge_array<unsigned int, max_dimension_count> current_output_position;
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int entry_id = workload_id / output_feature_map_count;
int output_feature_map_id = workload_id - (entry_id * output_feature_map_count);
std::vector<float>::iterator out_it_base = out_it_global + (entry_id * output_neuron_count) + (output_feature_map_id * output_neuron_count_per_feature_map);
std::vector<float>::const_iterator in_it_base = in_it_global + entry_id * input_neuron_count;
const int start_column_index = row_indices[output_feature_map_id];
const int end_column_index = row_indices[output_feature_map_id + 1];
std::fill_n(current_output_position.begin(), dimension_count, 0);
for(std::vector<float>::iterator out_it = out_it_base; out_it != out_it_base + output_neuron_count_per_feature_map; ++out_it)
{
float sum = *(biases + output_feature_map_id);
std::vector<float>::const_iterator weights_it = weights + start_column_index * const_window_elem_count;
std::vector<float>::const_iterator in_it_base2 = in_it_base;
for(unsigned int i = 0; i < dimension_count; ++i)
in_it_base2 += current_output_position[i] * (*(input_slices_it + i));
for(int column_index = start_column_index; column_index < end_column_index; ++column_index)
{
int input_feature_map_id = column_indices[column_index];
// Define the starting position of the first input elem
std::vector<float>::const_iterator in_it = in_it_base2 + (input_feature_map_id * input_neuron_count_per_feature_map);
for(unsigned int i = 0; i < const_window_elem_count; ++i)
{
sum += (*(in_it + *(offset_list_it + i))) * (*weights_it);
++weights_it;
}
}
*out_it = sum;
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *(output_dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
}
}
}
void sparse_convolution_layer_updater_plain::update_weights(
const_additional_buffer_smart_ptr input_neurons,
const_additional_buffer_smart_ptr output_errors,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
layer_data_smart_ptr gradient,
const_layer_data_custom_smart_ptr data_custom,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id) const
{
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
const std::vector<float>::const_iterator in_it_global = input_neurons->begin() + input_neuron_count * offset_input_entry_id;
const std::vector<float>::const_iterator out_err_it_global = output_errors->begin();
nnforge_shared_ptr<const sparse_convolution_layer> layer_derived = nnforge_dynamic_pointer_cast<const sparse_convolution_layer>(layer_schema);
const std::vector<unsigned int>& window_sizes = layer_derived->window_sizes;
unsigned int feature_map_connection_count = layer_derived->feature_map_connection_count;
const unsigned int dimension_count = static_cast<unsigned int>(window_sizes.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
unsigned int window_elem_count = 1;
for(unsigned int i = 0; i < dimension_count; ++i)
window_elem_count *= window_sizes[i];
const unsigned int const_window_elem_count = window_elem_count;
const std::vector<float>::iterator gradient_weights = (*gradient)[0].begin();
const std::vector<float>::iterator gradient_biases = (*gradient)[1].begin();
const std::vector<int>::const_iterator column_indices = (*data_custom)[0].begin();
const std::vector<int>::const_iterator row_indices = (*data_custom)[1].begin();
std::vector<std::pair<int, int> > out_fm_in_fm_list(feature_map_connection_count);
int i = 0;
for(int output_feature_map_id = 0; output_feature_map_id < output_configuration_specific.feature_map_count; ++output_feature_map_id)
{
const int start_column_index = row_indices[output_feature_map_id];
const int end_column_index = row_indices[output_feature_map_id + 1];
for(int column_index = start_column_index; column_index < end_column_index; ++column_index)
{
int input_feature_map_id = column_indices[column_index];
out_fm_in_fm_list[i].first = output_feature_map_id;
out_fm_in_fm_list[i].second = input_feature_map_id;
++i;
}
}
std::vector<unsigned int> current_local_input_position(dimension_count, 0);
std::vector<unsigned int> offset_list(window_elem_count);
for(unsigned int i = 1; i < window_elem_count; ++i)
{
int offset = 0;
for(unsigned int j = 0; j < dimension_count; ++j)
{
offset += static_cast<int>(input_slices[j]);
if ((++current_local_input_position[j]) < window_sizes[j])
{
offset_list[i] = offset_list[i-1] + offset;
break;
}
current_local_input_position[j] = 0;
offset -= static_cast<int>(window_sizes[j] * input_slices[j]);
}
}
const unsigned int output_feature_map_count = output_configuration_specific.feature_map_count;
const unsigned int input_feature_map_count = input_configuration_specific.feature_map_count;
const int total_workload = feature_map_connection_count;
const unsigned int const_entry_count = updater_count;
const std::vector<unsigned int>::const_iterator output_dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator offset_list_it = offset_list.begin();
const std::vector<std::pair<int, int> >::const_iterator out_fm_in_fm_it = out_fm_in_fm_list.begin();
const int const_updater_count = updater_count;
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count)
{
nnforge_array<unsigned int, max_dimension_count> current_output_position;
std::vector<float> weights_local(const_window_elem_count, 0.0F);
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int weight_block_id = workload_id;
int output_feature_map_id = out_fm_in_fm_it[weight_block_id].first;
int input_feature_map_id = out_fm_in_fm_it[weight_block_id].second;
std::fill_n(weights_local.begin(), const_window_elem_count, 0.0F);
for(int entry_id = 0; entry_id < const_updater_count; ++entry_id)
{
std::vector<float>::const_iterator in_it_base = in_it_global + (entry_id * input_neuron_count) + (input_feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::const_iterator out_err_it_base = out_err_it_global + (entry_id * output_neuron_count) + (output_feature_map_id * output_neuron_count_per_feature_map);
std::fill_n(current_output_position.begin(), dimension_count, 0);
for(std::vector<float>::const_iterator out_err_it = out_err_it_base; out_err_it != out_err_it_base + output_neuron_count_per_feature_map; ++out_err_it)
{
std::vector<float>::const_iterator in_it = in_it_base;
for(unsigned int i = 0; i < dimension_count; ++i)
in_it += current_output_position[i] * (*(input_slices_it + i));
float current_err = *out_err_it;
for(unsigned int i = 0; i < const_window_elem_count; ++i)
{
float in_neuron = *(in_it + *(offset_list_it + i));
weights_local[i] += (in_neuron * current_err);
}
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *(output_dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
}
std::vector<float>::iterator gradient_weights_it_base = gradient_weights + weight_block_id * const_window_elem_count;
std::vector<float>::iterator weights_local_it = weights_local.begin();
for(std::vector<float>::iterator it = gradient_weights_it_base; it != gradient_weights_it_base + const_window_elem_count; ++it, ++weights_local_it)
*it += *weights_local_it;
}
}
const int total_workload_bias = output_feature_map_count;
#pragma omp parallel for default(none) schedule(guided) num_threads(plain_config->openmp_thread_count)
for(int workload_id = 0; workload_id < total_workload_bias; ++workload_id)
{
int output_feature_map_id = workload_id;
float sum = 0.0F;
for(int entry_id = 0; entry_id < const_updater_count; ++entry_id)
{
std::vector<float>::const_iterator out_err_it_base = out_err_it_global + (entry_id * output_neuron_count) + (output_feature_map_id * output_neuron_count_per_feature_map);
for(std::vector<float>::const_iterator out_err_it = out_err_it_base; out_err_it != out_err_it_base + output_neuron_count_per_feature_map; ++out_err_it)
sum += *out_err_it;
}
*(gradient_biases + output_feature_map_id) += sum;
}
}
void sparse_convolution_layer_updater_plain::backprop(
additional_buffer_smart_ptr input_errors,
const_additional_buffer_smart_ptr input_neurons,
const_additional_buffer_smart_ptr output_errors,
const_additional_buffer_smart_ptr output_neurons,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count) const
{
const std::vector<float>::iterator in_err_it_global = input_errors->begin();
const std::vector<float>::const_iterator out_err_it_global = output_errors->begin();
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
nnforge_shared_ptr<const sparse_convolution_layer> layer_derived = nnforge_dynamic_pointer_cast<const sparse_convolution_layer>(layer_schema);
const std::vector<unsigned int>& window_sizes = layer_derived->window_sizes;
const unsigned int dimension_count = static_cast<unsigned int>(window_sizes.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
unsigned int window_elem_count = 1;
for(unsigned int i = 0; i < dimension_count; ++i)
window_elem_count *= window_sizes[i];
const unsigned int const_window_elem_count = window_elem_count;
const std::vector<float>::const_iterator weights = (*data)[0].begin();
const std::vector<int>::const_iterator column_indices = (*data_custom)[0].begin();
const std::vector<int>::const_iterator row_indices = (*data_custom)[1].begin();
std::vector<std::vector<std::pair<int, int> > > in_fm_out_fm_weight_pos_list_list(input_configuration_specific.feature_map_count);
for(int output_feature_map_id = 0; output_feature_map_id < output_configuration_specific.feature_map_count; ++output_feature_map_id)
{
const int start_column_index = row_indices[output_feature_map_id];
const int end_column_index = row_indices[output_feature_map_id + 1];
for(int column_index = start_column_index; column_index < end_column_index; ++column_index)
{
int input_feature_map_id = column_indices[column_index];
in_fm_out_fm_weight_pos_list_list[input_feature_map_id].push_back(std::make_pair(output_feature_map_id, column_index));
}
}
std::vector<unsigned int> current_local_input_position(dimension_count, 0);
std::vector<unsigned int> offset_list(window_elem_count);
for(unsigned int i = 1; i < window_elem_count; ++i)
{
int offset = 0;
for(unsigned int j = 0; j < dimension_count; ++j)
{
offset += static_cast<int>(input_slices[j]);
if ((++current_local_input_position[j]) < window_sizes[j])
{
offset_list[i] = offset_list[i-1] + offset;
break;
}
current_local_input_position[j] = 0;
offset -= static_cast<int>(window_sizes[j] * input_slices[j]);
}
}
const unsigned int output_feature_map_count = output_configuration_specific.feature_map_count;
const unsigned int input_feature_map_count = input_configuration_specific.feature_map_count;
const int total_workload = updater_count * input_feature_map_count;
const std::vector<unsigned int>::const_iterator output_dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator offset_list_it = offset_list.begin();
const std::vector<std::vector<std::pair<int, int> > >::const_iterator in_fm_out_fm_weight_pos_it = in_fm_out_fm_weight_pos_list_list.begin();
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count)
{
nnforge_array<unsigned int, max_dimension_count> current_output_position;
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int entry_id = workload_id / input_feature_map_count;
int input_feature_map_id = workload_id - (entry_id * input_feature_map_count);
std::vector<float>::const_iterator out_err_it_base = out_err_it_global + (entry_id * output_neuron_count);
std::vector<float>::iterator in_err_it_base = in_err_it_global + (entry_id * input_neuron_count) + (input_feature_map_id * input_neuron_count_per_feature_map);
const std::vector<std::pair<int, int> >& out_fm_weight_pos_list = in_fm_out_fm_weight_pos_it[input_feature_map_id];
std::fill_n(in_err_it_base, input_neuron_count_per_feature_map, 0.0F);
std::fill_n(current_output_position.begin(), dimension_count, 0);
for(std::vector<float>::const_iterator out_err_it_base2 = out_err_it_base; out_err_it_base2 != out_err_it_base + output_neuron_count_per_feature_map; ++out_err_it_base2)
{
std::vector<float>::iterator in_err_it = in_err_it_base;
for(unsigned int i = 0; i < dimension_count; ++i)
in_err_it += current_output_position[i] * (*(input_slices_it + i));
for(std::vector<std::pair<int, int> >::const_iterator it = out_fm_weight_pos_list.begin(); it != out_fm_weight_pos_list.end(); ++it)
{
int output_feature_map_id = it->first;
int weight_block_id = it->second;
std::vector<float>::const_iterator out_err_it = out_err_it_base2 + (output_feature_map_id * output_neuron_count_per_feature_map);
std::vector<float>::const_iterator weights_it = weights + weight_block_id * const_window_elem_count;
float current_err = *out_err_it;
for(unsigned int i = 0; i < const_window_elem_count; ++i)
{
float w = *weights_it;
*(in_err_it + *(offset_list_it + i)) += (w * current_err);
++weights_it;
}
}
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *(output_dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
}
}
}
void local_contrast_subtractive_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id) const
{
if (offset_input_entry_id > 0)
throw neural_network_exception("local_contrast_subtractive_layer_updater_plain is not able to run using offset");
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
nnforge_shared_ptr<const local_contrast_subtractive_layer> layer_derived = nnforge_dynamic_pointer_cast<const local_contrast_subtractive_layer>(layer_schema);
const std::vector<std::vector<float> >& window_weights_list = layer_derived->window_weights_list;
const std::vector<unsigned int>& feature_maps_affected = layer_derived->feature_maps_affected;
const std::vector<unsigned int>& feature_maps_unaffected = layer_derived->feature_maps_unaffected;
const unsigned int dimension_count = static_cast<unsigned int>(window_weights_list.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
const std::vector<unsigned int>::const_iterator dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const unsigned int feature_maps_affected_count = static_cast<unsigned int>(feature_maps_affected.size());
const unsigned int feature_maps_unaffected_count = static_cast<unsigned int>(feature_maps_affected.size());
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator feature_maps_affected_it = feature_maps_affected.begin();
const std::vector<float>::const_iterator input_buffer_it = input_buffer->begin();
const std::vector<float>::iterator output_buffer_it = output_buffer->begin();
const std::vector<std::vector<float> >::const_iterator window_weights_list_it = window_weights_list.begin();
const int total_workload = updater_count * feature_maps_affected_count;
const int openmp_thread_count = plain_config->openmp_thread_count;
#pragma omp parallel default(none) shared(additional_buffers) num_threads(openmp_thread_count)
{
std::vector<additional_buffer_smart_ptr> local_additional_buffers;
int thread_id = 0;
#ifdef _OPENMP
thread_id = omp_get_thread_num();
#endif
local_additional_buffers.push_back(additional_buffers[thread_id]);
if (dimension_count > 1)
local_additional_buffers.push_back(additional_buffers[openmp_thread_count + thread_id]);
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int entry_id = workload_id / feature_maps_affected_count;
int affected_feature_map_id = workload_id - (entry_id * feature_maps_affected_count);
unsigned int current_output_buffer_index = 0;
unsigned int feature_map_id = *(feature_maps_affected_it + affected_feature_map_id);
for(unsigned int dimension_id = 0; dimension_id < dimension_count; ++dimension_id)
{
std::vector<float>::iterator out_it_base = local_additional_buffers[current_output_buffer_index]->begin();
std::vector<float>::const_iterator in_it;
if (dimension_id > 0)
in_it = local_additional_buffers[1 - current_output_buffer_index]->begin();
else
in_it = input_buffer_it + (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
int max_output_size = *(dimension_sizes_it + dimension_id);
int input_slice_size = *(input_slices_it + dimension_id);
std::vector<unsigned int> current_output_position(dimension_count, 0);
for(std::vector<float>::iterator out_it = out_it_base; out_it != out_it_base + output_neuron_count_per_feature_map; ++out_it, ++in_it)
{
const std::vector<float>& current_window_weights_list = *(window_weights_list_it + dimension_id);
float sum = *in_it * current_window_weights_list[0];
int current_position = static_cast<int>(current_output_position[dimension_id]);
int dest_forward = current_position;
int dest_backward = dest_forward;
for (std::vector<float>::const_iterator it = current_window_weights_list.begin() + 1; it != current_window_weights_list.end(); ++it)
{
dest_forward++;
dest_backward--;
int dest_forward_actual = (dest_forward < max_output_size) ? dest_forward : (((max_output_size << 1) - 1) - dest_forward);
int dest_backward_actual = (dest_backward >= 0) ? dest_backward : (-1 - dest_backward);
int offset_forward = ((dest_forward_actual - current_position) * input_slice_size);
int offset_backward = ((dest_backward_actual - current_position) * input_slice_size);
sum += (*(in_it + offset_forward) + *(in_it + offset_backward)) * (*it);
}
*out_it = sum;
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *(dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
current_output_buffer_index = 1 - current_output_buffer_index;
} // for(unsigned int dimension_id
// Subtract the gaussian blur
{
std::vector<float>::const_iterator original_in_it = input_buffer_it + (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::iterator out_it = output_buffer_it + (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::const_iterator in_it = local_additional_buffers[1 - current_output_buffer_index]->begin();
for(int i = 0; i < static_cast<int>(input_neuron_count_per_feature_map); ++i)
*(out_it + i) = *(original_in_it + i) - *(in_it + i);
}
}
} // #pragma parallel
if (feature_maps_unaffected_count > 0)
{
for(unsigned int entry_id = 0; entry_id < updater_count; ++entry_id)
{
for(std::vector<unsigned int>::const_iterator it = feature_maps_unaffected.begin(); it != feature_maps_unaffected.end(); ++it)
{
unsigned int feature_map_id = *it;
std::vector<float>::const_iterator original_in_it = input_buffer_it + (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::iterator out_it = output_buffer_it + (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
std::copy(original_in_it, original_in_it + input_neuron_count_per_feature_map, out_it);
}
}
}
}
void average_subsampling_layer_hessian_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int entry_count) const
{
const std::vector<float>::const_iterator in_it_global = input_buffer->begin();
const std::vector<float>::iterator out_it_global = output_buffer->begin();
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
std::tr1::shared_ptr<const average_subsampling_layer> layer_derived = std::tr1::dynamic_pointer_cast<const average_subsampling_layer>(layer_schema);
const std::vector<unsigned int>& subsampling_sizes = layer_derived->subsampling_sizes;
const unsigned int dimension_count = static_cast<unsigned int>(layer_derived->subsampling_sizes.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
unsigned int subsampling_elem_count = 1;
for(unsigned int i = 0; i < dimension_count; ++i)
subsampling_elem_count *= subsampling_sizes[i];
const unsigned int const_subsampling_elem_count = subsampling_elem_count;
const float mult = 1.0F / static_cast<float>(subsampling_elem_count);
const unsigned int feature_map_count = output_configuration_specific.feature_map_count;
std::vector<unsigned int> current_local_input_position(dimension_count, 0);
std::vector<unsigned int> offset_list(subsampling_elem_count);
for(unsigned int i = 1; i < subsampling_elem_count; ++i)
{
int offset = 0;
for(unsigned int j = 0; j < dimension_count; ++j)
{
offset += static_cast<int>(input_slices[j]);
if ((++current_local_input_position[j]) < subsampling_sizes[j])
{
offset_list[i] = offset_list[i-1] + offset;
break;
}
current_local_input_position[j] = 0;
offset -= static_cast<int>(subsampling_sizes[j] * input_slices[j]);
}
}
const int total_workload = entry_count * output_configuration_specific.feature_map_count;
const std::vector<unsigned int>::const_iterator dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const std::vector<unsigned int>::const_iterator subsampling_sizes_it = subsampling_sizes.begin();
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator offset_list_it = offset_list.begin();
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count)
{
std::tr1::array<unsigned int, max_dimension_count> current_output_position;
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int entry_id = workload_id / feature_map_count;
int feature_map_id = workload_id - (entry_id * feature_map_count);
std::vector<float>::const_iterator in_it_base = in_it_global + (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::iterator out_it_base = out_it_global + (entry_id * output_neuron_count) + (feature_map_id * output_neuron_count_per_feature_map);
std::fill_n(current_output_position.begin(), dimension_count, 0);
for(std::vector<float>::iterator out_it = out_it_base; out_it != out_it_base + output_neuron_count_per_feature_map; ++out_it)
{
// Define the starting position of the first input elem
std::vector<float>::const_iterator in_it = in_it_base;
for(unsigned int i = 0; i < dimension_count; ++i)
in_it += current_output_position[i] * (*(subsampling_sizes_it + i)) * (*(input_slices_it + i));
float sum = 0.0F;
for(unsigned int i = 0; i < const_subsampling_elem_count; ++i)
{
sum += *(in_it + (*(offset_list_it + i)));
}
*out_it = sum * mult;
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *( dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
}
}
}
void max_subsampling_layer_updater_plain::test(
const_additional_buffer_smart_ptr input_buffer,
additional_buffer_smart_ptr output_buffer,
std::vector<additional_buffer_smart_ptr>& additional_buffers,
plain_running_configuration_const_smart_ptr plain_config,
const_layer_smart_ptr layer_schema,
const_layer_data_smart_ptr data,
const_layer_data_custom_smart_ptr data_custom,
const layer_configuration_specific& input_configuration_specific,
const layer_configuration_specific& output_configuration_specific,
unsigned int updater_count,
unsigned int offset_input_entry_id,
bool force_deterministic) const
{
nnforge_shared_ptr<const max_subsampling_layer> layer_derived = nnforge_dynamic_pointer_cast<const max_subsampling_layer>(layer_schema);
if (layer_derived->tiling)
throw neural_network_exception("max_subsampling_layer_updater_plain is not able to run for max subsampling layer with tiling");
if (offset_input_entry_id > 0)
throw neural_network_exception("max_subsampling_layer_updater_plain is not able to run using offset");
const std::vector<float>::const_iterator in_it_global = input_buffer->begin();
const std::vector<float>::iterator out_it_global = output_buffer->begin();
const std::vector<float>::iterator max_indexes_it_global = additional_buffers[0]->begin();
const unsigned int input_neuron_count = input_configuration_specific.get_neuron_count();
const unsigned int input_neuron_count_per_feature_map = input_configuration_specific.get_neuron_count_per_feature_map();
const unsigned int output_neuron_count = output_configuration_specific.get_neuron_count();
const unsigned int output_neuron_count_per_feature_map = output_configuration_specific.get_neuron_count_per_feature_map();
const std::vector<unsigned int>& subsampling_sizes = layer_derived->subsampling_sizes;
const unsigned int dimension_count = static_cast<unsigned int>(layer_derived->subsampling_sizes.size());
std::vector<unsigned int> input_slices(input_configuration_specific.dimension_sizes.size());
input_slices[0] = 1;
for(unsigned int i = 0; i < dimension_count - 1; ++i)
input_slices[i + 1] = input_slices[i] * input_configuration_specific.dimension_sizes[i];
unsigned int subsampling_elem_count = 1;
for(unsigned int i = 0; i < dimension_count; ++i)
subsampling_elem_count *= subsampling_sizes[i];
const unsigned int const_subsampling_elem_count = subsampling_elem_count;
const unsigned int feature_map_count = output_configuration_specific.feature_map_count;
std::vector<unsigned int> current_local_input_position(dimension_count, 0);
std::vector<unsigned int> offset_list(subsampling_elem_count);
for(unsigned int i = 1; i < subsampling_elem_count; ++i)
{
int offset = 0;
for(unsigned int j = 0; j < dimension_count; ++j)
{
offset += static_cast<int>(input_slices[j]);
if ((++current_local_input_position[j]) < subsampling_sizes[j])
{
offset_list[i] = offset_list[i-1] + offset;
break;
}
current_local_input_position[j] = 0;
offset -= static_cast<int>(subsampling_sizes[j] * input_slices[j]);
}
}
const int total_workload = updater_count * output_configuration_specific.feature_map_count;
const std::vector<unsigned int>::const_iterator dimension_sizes_it = output_configuration_specific.dimension_sizes.begin();
const std::vector<unsigned int>::const_iterator subsampling_sizes_it = subsampling_sizes.begin();
const std::vector<unsigned int>::const_iterator input_slices_it = input_slices.begin();
const std::vector<unsigned int>::const_iterator offset_list_it = offset_list.begin();
#pragma omp parallel default(none) num_threads(plain_config->openmp_thread_count)
{
nnforge_array<unsigned int, max_dimension_count> current_output_position;
#pragma omp for schedule(guided)
for(int workload_id = 0; workload_id < total_workload; ++workload_id)
{
int entry_id = workload_id / feature_map_count;
int feature_map_id = workload_id - (entry_id * feature_map_count);
const int in_base_offset = (entry_id * input_neuron_count) + (feature_map_id * input_neuron_count_per_feature_map);
std::vector<float>::iterator out_it_base = out_it_global + (entry_id * output_neuron_count) + (feature_map_id * output_neuron_count_per_feature_map);
std::vector<float>::iterator max_indexes_it_base = max_indexes_it_global + (entry_id * output_neuron_count) + (feature_map_id * output_neuron_count_per_feature_map);
std::fill_n(current_output_position.begin(), dimension_count, 0);
std::vector<float>::iterator max_indexes_it = max_indexes_it_base;
for(std::vector<float>::iterator out_it = out_it_base; out_it != out_it_base + output_neuron_count_per_feature_map; ++out_it, ++max_indexes_it)
{
// Define the starting position of the first input elem
int in_offset = in_base_offset;
for(unsigned int i = 0; i < dimension_count; ++i)
in_offset += current_output_position[i] * (*(subsampling_sizes_it + i)) * (*(input_slices_it + i));
unsigned int max_index = 0;
float best_val = -1.0e38F;
for(unsigned int i = 0; i < const_subsampling_elem_count; ++i)
{
int current_offset = in_offset + *(offset_list_it + i);
float new_val = *(in_it_global + current_offset);
if ((i == 0) || (new_val > best_val))
{
best_val = new_val;
max_index = current_offset;
}
}
*out_it = best_val;
*((unsigned int *)(&(*max_indexes_it))) = max_index;
// Go to the next output element
for(unsigned int i = 0; i < dimension_count; ++i)
{
if ((++current_output_position[i]) < *( dimension_sizes_it + i))
break;
current_output_position[i] = 0;
}
}
}
}
}