[NNAdapter] Support int64 datatype for eltwise_ops (#9859)

Author: shentanyue

lite/backends/nnadapter/nnadapter/src/operation/elementwise.cc

@@ -141,6 +141,18 @@ NNADAPTER_EXPORT int ExecuteElementwise(core::Operation* operation) {
                                         input1_shape,
                                         static_cast<math::FuseCode>(fuse_code),
                                         output_data);
+  } else if (input0_type.precision == NNADAPTER_INT64 &&
+             input1_type.precision == NNADAPTER_INT64) {
+    const auto input0_data = reinterpret_cast<const int64_t*>(input0_buffer);
+    const auto input1_data = reinterpret_cast<const int64_t*>(input1_buffer);
+    auto output_data = reinterpret_cast<int64_t*>(output_buffer);
+    status = math::elementwise<int64_t>(eltwise_type,
+                                        input0_data,
+                                        input0_shape,
+                                        input1_data,
+                                        input1_shape,
+                                        static_cast<math::FuseCode>(fuse_code),
+                                        output_data);
   } else if (input0_type.precision == NNADAPTER_QUANT_INT8_SYMM_PER_LAYER &&
              input1_type.precision == NNADAPTER_QUANT_INT8_SYMM_PER_LAYER) {
     const auto input0_data = reinterpret_cast<const int8_t*>(input0_buffer);