add unique_consecutive op

Author: firestonelib

paddle/fluid/operators/unique_op.cu

@@ -22,13 +22,141 @@ limitations under the License. */
 #include <vector>
 #include "paddle/fluid/framework/tensor_util.h"  // TensorToVector()
 #include "paddle/fluid/operators/unique_op.h"    // TransComute()
-#include "paddle/fluid/operators/unique_utils.h"
 
 namespace paddle {
 namespace operators {
 
 using Tensor = framework::Tensor;
 
+// Binary function 'less than'
+template <typename InT>
+struct LessThan {
+  int col;
+  const InT* in_trans_data;
+
+  LessThan(int64_t _col, const InT* _in_trans_data)
+      : col(_col), in_trans_data(_in_trans_data) {}
+
+  __device__ bool operator()(int64_t a, int64_t b) const {
+    for (int i = 0; i < col; ++i) {
+      InT lhs = in_trans_data[i + a * col];
+      InT rhs = in_trans_data[i + b * col];
+      if (lhs < rhs) {
+        return true;
+      } else if (lhs > rhs) {
+        return false;
+      }
+    }
+    return false;
+  }
+};
+
+// Binary function 'equal_to'
+template <typename InT>
+struct BinaryEqual {
+  int64_t col;
+  const InT* in_trans_data;
+
+  BinaryEqual(int64_t _col, const InT* _in_trans_data)
+      : col(_col), in_trans_data(_in_trans_data) {}
+
+  __device__ bool operator()(int64_t a, int64_t b) const {
+    for (int64_t i = 0; i < col; ++i) {
+      InT lhs = in_trans_data[i + a * col];
+      InT rhs = in_trans_data[i + b * col];
+      if (lhs != rhs) {
+        return false;
+      }
+    }
+    return true;
+  }
+};
+
+// Binary function 'not_equal_to'
+template <typename InT>
+struct BinaryNotEqual {
+  int64_t col;
+  const InT* in_trans_data;
+
+  BinaryNotEqual(int64_t _col, const InT* _in_trans_data)
+      : col(_col), in_trans_data(_in_trans_data) {}
+
+  __device__ bool operator()(int64_t a, int64_t b) const {
+    for (int64_t i = 0; i < col; ++i) {
+      InT lhs = in_trans_data[i + a * col];
+      InT rhs = in_trans_data[i + b * col];
+      if (lhs != rhs) {
+        return true;
+      }
+    }
+    return false;
+  }
+};
+
+// index_select() function for Tensor
+template <typename InT, typename IndexT>
+void IndexSelect(const framework::ExecutionContext& context,
+                 const Tensor& input, const Tensor& index, Tensor* output,
+                 int dim) {
+  auto input_dim = input.dims();
+  auto input_dim_size = input_dim.size();
+  auto output_dim = output->dims();
+
+  auto slice_size = 1;
+  for (auto i = dim + 1; i < input_dim_size; i++) {
+    slice_size *= input_dim[i];
+  }
+
+  auto input_width = slice_size * input_dim[dim];
+  auto output_width = slice_size * output_dim[dim];
+
+  auto outer_nums = 1;
+  for (auto i = 0; i < dim; i++) {
+    outer_nums *= input_dim[i];
+  }
+
+  auto index_size = index.dims()[0];
+
+  std::vector<InT> input_vec;
+  std::vector<IndexT> index_vec;
+  TensorToVector(input, context.device_context(), &input_vec);
+  TensorToVector(index, context.device_context(), &index_vec);
+  std::vector<InT> out_vec(output->numel());
+
+  for (int i = 0; i < index_size; i++) {
+    PADDLE_ENFORCE_GE(
+        index_vec[i], 0,
+        platform::errors::InvalidArgument(
+            "Variable value (index) of OP(index_select) "
+            "expected >= 0 and < %ld, but got %ld. Please check input "
+            "value.",
+            input_dim[dim], index_vec[i]));
+    PADDLE_ENFORCE_LT(
+        index_vec[i], input_dim[dim],
+        platform::errors::InvalidArgument(
+            "Variable value (index) of OP(index_select) "
+            "expected >= 0 and < %ld, but got %ld. Please check input "
+            "value.",
+            input_dim[dim], index_vec[i]));
+  }
+
+  for (auto i = 0; i < outer_nums; i++) {
+    auto input_start_offset = i * input_width;
+    auto output_start_offset = i * output_width;
+
+    for (auto j = 0; j < index_size; j++) {
+      IndexT index_value = index_vec[j];
+      for (auto k = 0; k < slice_size; k++) {
+        out_vec[output_start_offset + j * slice_size + k] =
+            input_vec[input_start_offset + index_value * slice_size + k];
+      }
+    }
+  }
+  output->mutable_data<InT>(context.GetPlace());
+  framework::TensorFromVector(out_vec, context.device_context(), output);
+  output->Resize(output_dim);
+}
+
 // The core logic of computing Unique for a flattend Tensor
 template <typename InT, typename IndexT, typename equal_T, typename not_equal_T>
 static void UniqueFlattendCUDATensor(const framework::ExecutionContext& context,