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#ifndef CAFFE2_OPERATORS_PREPEND_DIM_OP_H_
#define CAFFE2_OPERATORS_PREPEND_DIM_OP_H_
#include "caffe2/core/common_omp.h"
#include "caffe2/core/context.h"
#include "caffe2/core/logging.h"
#include "caffe2/core/operator.h"
#include <c10/util/irange.h>
namespace caffe2 {
template <class Context>
class PrependDimOp : public Operator<Context> {
public:
USE_OPERATOR_CONTEXT_FUNCTIONS;
template <class... Args>
explicit PrependDimOp(Args&&... args)
: Operator<Context>(std::forward<Args>(args)...),
dim_size_(this->template GetSingleArgument<int64_t>("dim_size", 0)) {
CAFFE_ENFORCE_GT(
dim_size_, 0, "Argument dim_size must be greater than zero.");
}
bool RunOnDevice() override {
auto& input = Input(0);
auto* output = Output(0);
CAFFE_ENFORCE(input.dim() > 0, "Input must be at least 1D.");
CAFFE_ENFORCE(
input.size(0) % dim_size_ == 0,
"First dimension must be multiple of prepend_dim. Current first dimension: ",
input.size(0));
vector<int64_t> actual_new_shape(input.dim() + 1);
actual_new_shape[0] = dim_size_;
actual_new_shape[1] = input.size(0) / dim_size_;
// NOLINTNEXTLINE(clang-diagnostic-sign-compare)
for (const auto i : c10::irange(1, input.sizes().size())) {
actual_new_shape[i + 1] = input.size(i);
}
output->Resize(actual_new_shape);
if (output != &input) {
// If we are not doing in-place computation, a copy is needed.
context_.CopyItemsSameDevice(
input.dtype(),
input.numel(),
input.raw_data(),
output->raw_mutable_data(input.dtype()));
}
return true;
}
private:
int64_t dim_size_;
};
template <class Context>
class MergeDimOp : public Operator<Context> {
public:
USE_OPERATOR_CONTEXT_FUNCTIONS;
template <class... Args>
explicit MergeDimOp(Args&&... args)
: Operator<Context>(std::forward<Args>(args)...) {}
bool RunOnDevice() override {
auto& input = Input(0);
auto* output = Output(0);
CAFFE_ENFORCE(input.dim() > 1, "Input must be at least 2D.");
vector<int64_t> actual_new_shape(input.dim() - 1);
actual_new_shape[0] = input.size(0) * input.size(1);
// NOLINTNEXTLINE(clang-diagnostic-sign-compare)
for (int i = 1; i < input.sizes().size() - 1; ++i) {
actual_new_shape[i] = input.size(i + 1);
}
output->Resize(actual_new_shape);
if (output != &input) {
// If we are not doing in-place computation, a copy is needed.
context_.CopyItemsSameDevice(
input.dtype(),
input.numel(),
input.raw_data(),
output->raw_mutable_data(input.dtype()));
}
return true;
}
private:
int64_t dim_size_;
};
} // namespace caffe2
#endif // CAFFE2_OPERATORS_PREPEND_DIM_OP_H_
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