1 files changed, 48 insertions, 0 deletions
diff --git a/libs/tflite/src/TensorShapeUtils.cpp b/libs/tflite/src/TensorShapeUtils.cpp
new file mode 100644
index 000000000..b5d906719
--- /dev/null
+++ b/libs/tflite/src/TensorShapeUtils.cpp
@@ -0,0 +1,48 @@
+#include "tflite/TensorShapeUtils.h"
+
+namespace nnfw
+{
+namespace tflite
+{
+
+nnfw::misc::tensor::Shape broadcast(const nnfw::misc::tensor::Shape &lhs_shape,
+                                    const nnfw::misc::tensor::Shape &rhs_shape)
+{
+  const uint32_t lhs_rank = lhs_shape.rank();
+  const uint32_t rhs_rank = rhs_shape.rank();
+  const uint32_t out_rank = std::max(lhs_rank, rhs_rank);
+
+  // TODO Simplify implementation
+  std::vector<int32_t> lhs_normalized_dims;
+  std::vector<int32_t> rhs_normalized_dims;
+
+  for (uint32_t n = 0; n < out_rank - lhs_rank; ++n)
+  {
+    lhs_normalized_dims.emplace_back(1);
+  }
+  for (uint32_t axis = 0; axis < lhs_rank; ++axis)
+  {
+    lhs_normalized_dims.emplace_back(lhs_shape.dim(axis));
+  }
+
+  for (uint32_t n = 0; n < out_rank - rhs_rank; ++n)
+  {
+    rhs_normalized_dims.emplace_back(1);
+  }
+  for (uint32_t axis = 0; axis < rhs_rank; ++axis)
+  {
+    rhs_normalized_dims.emplace_back(rhs_shape.dim(axis));
+  }
+
+  nnfw::misc::tensor::Shape out_shape(out_rank);
+
+  for (uint32_t axis = 0; axis < out_rank; ++axis)
+  {
+    out_shape.dim(axis) = std::max(lhs_normalized_dims.at(axis), rhs_normalized_dims.at(axis));
+  }
+
+  return out_shape;
+}
+
+} // namespace tflite
+} // namespace nnfw