[tosa_mlir_translator] Fix Rescale shift data type

Changed to support new data type of Rescale shift attr: DenseI8ArrayAttr
(instead of DenseI32ArrayAttr)

LLVM_REFSPEC: refs/changes/55/532955/1
TF_REFSPEC: refs/changes/50/700450/3

Signed-off-by: Tai Ly <tai.ly@arm.com>
Change-Id: I8f176ab95e167a8c4a0d3da605384509cf083d5e

1 files changed, 14 insertions, 2 deletions

diff --git a/src/TosaSerialize.cpp b/src/TosaSerialize.cpp
index 73c84e8..a3e21f9 100644
--- a/src/TosaSerialize.cpp
+++ b/src/TosaSerialize.cpp
@@ -244,6 +244,19 @@ static std::vector<T> getDenseI64ArrayAttr(mlir::Attribute attr) {
   return vec;
 }
 
+// Unpack 8-bit integer attribute element and pack into a std vector.
+template <class T>
+static std::vector<T> getDenseI8ArrayAttr(mlir::Attribute attr) {
+  auto array_ref = attr.cast<mlir::DenseI8ArrayAttr>().asArrayRef();
+
+  std::vector<T> vec;
+  for (auto val : array_ref) {
+    vec.push_back(val);
+  }
+
+  return vec;
+}
+
 // Main template to catch unimplemented translation.
 template <typename T>
 TosaSerializationOperator *
@@ -1179,8 +1192,7 @@ TosaSerializationOperatorBuilder::build<mlir::tosa::RescaleOp>(
 
   auto multiplier =
       op.getAttr("multiplier").dyn_cast<mlir::DenseI32ArrayAttr>().asArrayRef();
-  auto shift =
-      op.getAttr("shift").dyn_cast<mlir::DenseI32ArrayAttr>().asArrayRef();
+  auto shift = getDenseI8ArrayAttr<int32_t>(op.getAttr("shift"));
 
   std::string input_name = GetTensorName(op.getOperand(0));
   std::string output_name = GetTensorName(op.getResult(0));