!8287 add supported data types for cast ops

From: @liuwenhao4
Reviewed-by: @zhanghaibo5,@zhanghaibo5,@HilbertDavid,@zhang_xue_tong
Signed-off-by:

mindspore/lite/src/runtime/kernel/arm/fp32/cast_fp32.cc

@@ -17,6 +17,7 @@
 #include <vector>
 #include "schema/model_generated.h"
 #include "src/kernel_registry.h"
+#include "src/tensor.h"
 #include "nnacl/fp32/cast.h"
 #include "nnacl/op_base.h"
 #include "src/runtime/runtime_api.h"
@@ -70,6 +71,12 @@ int CastCPUKernel::DoCast(int thread_id) {
   MS_ASSERT(output_data != nullptr);
   auto input_data_type = input->data_type();
   auto output_data_type = output->data_type();
+  if (input_data_type == output_data_type) {
+    auto datalen = lite::DataTypeSize(input_data_type);
+    memcpy(reinterpret_cast<char *>(output_data) + offset * datalen,
+           reinterpret_cast<char *>(input->data_c()) + offset * datalen, data_num * datalen);
+    return RET_OK;
+  }
   if (output_data_type != kNumberTypeFloat32) {
     if (input_data_type == kNumberTypeFloat32 && output_data_type == kNumberTypeInt64) {
       Float32ToInt64(reinterpret_cast<float *>(input->data_c()) + offset,
@@ -83,9 +90,6 @@ int CastCPUKernel::DoCast(int thread_id) {
     } else if (input_data_type == kNumberTypeInt32 && output_data_type == kNumberTypeInt64) {
       Int32ToInt64(reinterpret_cast<int32_t *>(input->data_c()) + offset,
                    reinterpret_cast<int64_t *>(output_data) + offset, data_num);
-    } else if (input_data_type == kNumberTypeInt32 && output_data_type == kNumberTypeInt32) {
-      memcpy(reinterpret_cast<int32_t *>(output_data) + offset, reinterpret_cast<int32_t *>(input->data_c()) + offset,
-             data_num * sizeof(int32_t));
     } else {
       MS_LOG(ERROR) << "Unsupported datatype from " << input_data_type << " to " << output_data_type;
       return RET_ERROR;
@@ -108,10 +112,6 @@ int CastCPUKernel::DoCast(int thread_id) {
         Fp16ToFloat32(reinterpret_cast<uint16_t *>(input->MutableData()) + offset,
                       reinterpret_cast<float *>(output_data) + offset, data_num);
         break;
-      case kNumberTypeFloat32:
-        memcpy(reinterpret_cast<float *>(output_data) + offset, reinterpret_cast<float *>(input->data_c()) + offset,
-               data_num * sizeof(float));
-        break;
       default:
         MS_LOG(ERROR) << "Unsupported input data type " << input_data_type;
         return RET_ERROR;