Sync from tflite-micro at e87b788.

Signed-off-by: CFU-Playground-Bot <[email protected]>

conf/tflite-micro.version

@@ -1 +1 @@
-8746ec9
+e87b788

third_party/tflite-micro/tensorflow/lite/builtin_ops.h

@@ -186,6 +186,7 @@ typedef enum {
   kTfLiteBuiltinAtan2 = 156,
   kTfLiteBuiltinUnsortedSegmentMin = 157,
   kTfLiteBuiltinSign = 158,
+  kTfLiteBuiltinBitcast = 159,
 } TfLiteBuiltinOperator;
 
 #ifdef __cplusplus

third_party/tflite-micro/tensorflow/lite/c/builtin_op_data.h

@@ -1,4 +1,4 @@
-/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -15,8 +15,6 @@ limitations under the License.
 #ifndef TENSORFLOW_LITE_C_BUILTIN_OP_DATA_H_
 #define TENSORFLOW_LITE_C_BUILTIN_OP_DATA_H_
 
-/// For documentation, see
-/// third_party/tensorflow/lite/core/c/builtin_op_data.h.
-#include "tensorflow/lite/core/c/builtin_op_data.h"  // IWYU pragma: export
+#include "tensorflow/lite/core/c/builtin_op_data.h"
 
 #endif  // TENSORFLOW_LITE_C_BUILTIN_OP_DATA_H_

third_party/tflite-micro/tensorflow/lite/c/c_api_types.h

@@ -1,4 +1,4 @@
-/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
+/* Copyright 2022 The TensorFlow Authors. All Rights Reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -12,15 +12,9 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 ==============================================================================*/
-
-// This file declares types used by the pure C inference API defined in c_api.h,
-// some of which are also used in the C++ and C kernel and interpreter APIs.
-
 #ifndef TENSORFLOW_LITE_C_C_API_TYPES_H_
 #define TENSORFLOW_LITE_C_C_API_TYPES_H_
 
-/// For documentation, see
-/// third_party/tensorflow/lite/core/c/c_api_types.h.
-#include "tensorflow/lite/core/c/c_api_types.h"  // IWYU pragma: export
+#include "tensorflow/lite/core/c/c_api_types.h"
 
 #endif  // TENSORFLOW_LITE_C_C_API_TYPES_H_

third_party/tflite-micro/tensorflow/lite/c/common.h

@@ -36,8 +36,6 @@ limitations under the License.
 #ifndef TENSORFLOW_LITE_C_COMMON_H_
 #define TENSORFLOW_LITE_C_COMMON_H_
 
-/// For documentation, see
-/// third_party/tensorflow/lite/core/c/common.h.
-#include "tensorflow/lite/core/c/common.h"  // IWYU pragma: export
+#include "tensorflow/lite/core/c/common.h"
 
 #endif  // TENSORFLOW_LITE_C_COMMON_H_

third_party/tflite-micro/tensorflow/lite/core/api/flatbuffer_conversions.cc

@@ -256,6 +256,10 @@ TfLiteStatus ParseOpDataTfLite(const Operator* op, BuiltinOperator op_type,
       return ParseElu(op, error_reporter, allocator, builtin_data);
     }
 
+    case BuiltinOperator_EMBEDDING_LOOKUP: {
+      return ParseEmbeddingLookup(op, error_reporter, allocator, builtin_data);
+    }
+
     case BuiltinOperator_EXP: {
       return ParseExp(op, error_reporter, allocator, builtin_data);
     }
@@ -855,7 +859,6 @@ TfLiteStatus ParseOpDataTfLite(const Operator* op, BuiltinOperator op_type,
     case BuiltinOperator_CUSTOM:
     case BuiltinOperator_DENSIFY:
     case BuiltinOperator_DYNAMIC_UPDATE_SLICE:
-    case BuiltinOperator_EMBEDDING_LOOKUP:
     case BuiltinOperator_EQUAL:
     case BuiltinOperator_HASHTABLE_FIND:
     case BuiltinOperator_HASHTABLE_IMPORT:
@@ -885,6 +888,7 @@ TfLiteStatus ParseOpDataTfLite(const Operator* op, BuiltinOperator op_type,
     case BuiltinOperator_UNSORTED_SEGMENT_SUM:
     case BuiltinOperator_ATAN2:
     case BuiltinOperator_SIGN:
+    case BuiltinOperator_BITCAST:
     case BuiltinOperator_WHERE:
       return kTfLiteOk;
     case BuiltinOperator_PLACEHOLDER_FOR_GREATER_OP_CODES:
@@ -1335,6 +1339,14 @@ TfLiteStatus ParseElu(const Operator*, ErrorReporter*, BuiltinDataAllocator*,
   return kTfLiteOk;
 }
 
+// We have this parse function instead of directly returning kTfLiteOk from the
+// switch-case in ParseOpData because this function is used as part of the
+// selective registration for the OpResolver implementation in micro.
+TfLiteStatus ParseEmbeddingLookup(const Operator*, ErrorReporter*,
+                                  BuiltinDataAllocator*, void**) {
+  return kTfLiteOk;
+}
+
 // We have this parse function instead of directly returning kTfLiteOk from the
 // switch-case in ParseOpData because this function is used as part of the
 // selective registration for the OpResolver implementation in micro.

third_party/tflite-micro/tensorflow/lite/core/api/flatbuffer_conversions.h

@@ -151,6 +151,11 @@ TfLiteStatus ParseDiv(const Operator* op, ErrorReporter* error_reporter,
 TfLiteStatus ParseElu(const Operator* op, ErrorReporter* error_reporter,
                       BuiltinDataAllocator* allocator, void** builtin_data);
 
+TfLiteStatus ParseEmbeddingLookup(const Operator* op,
+                                  ErrorReporter* error_reporter,
+                                  BuiltinDataAllocator* allocator,
+                                  void** builtin_data);
+
 TfLiteStatus ParseEqual(const Operator* op, ErrorReporter* error_reporter,
                         BuiltinDataAllocator* allocator, void** builtin_data);
 

third_party/tflite-micro/tensorflow/lite/core/c/common.cc

@@ -219,11 +219,11 @@ TfLiteStatus TfLiteTensorCopy(const TfLiteTensor* src, TfLiteTensor* dst) {
   return kTfLiteOk;
 }
 
-void TfLiteTensorResizeMaybeCopy(size_t num_bytes, TfLiteTensor* tensor,
-                                 bool preserve_data) {
+TfLiteStatus TfLiteTensorResizeMaybeCopy(size_t num_bytes, TfLiteTensor* tensor,
+                                         bool preserve_data) {
   if (tensor->allocation_type != kTfLiteDynamic &&
       tensor->allocation_type != kTfLitePersistentRo) {
-    return;
+    return kTfLiteOk;
   }
 #ifdef TF_LITE_TENSORFLOW_PROFILER
   tflite::PauseHeapMonitoring(/*pause=*/true);
@@ -258,9 +258,15 @@ void TfLiteTensorResizeMaybeCopy(size_t num_bytes, TfLiteTensor* tensor,
   tflite::PauseHeapMonitoring(/*pause=*/false);
 #endif
   tensor->bytes = num_bytes;
+  if (tensor->data.data == nullptr && num_bytes != 0) {
+    // We are done allocating but tensor is pointing to null and a valid size
+    // was requested, so we error.
+    return kTfLiteError;
+  }
+  return kTfLiteOk;
 }
 
-void TfLiteTensorRealloc(size_t num_bytes, TfLiteTensor* tensor) {
+TfLiteStatus TfLiteTensorRealloc(size_t num_bytes, TfLiteTensor* tensor) {
   return TfLiteTensorResizeMaybeCopy(num_bytes, tensor, true);
 }
 #endif  // TF_LITE_STATIC_MEMORY
@@ -331,4 +337,18 @@ void TfLiteOpaqueDelegateDelete(TfLiteOpaqueDelegate* opaque_delegate) {
   delete tflite_delegate;
 }
 
+void* TfLiteOpaqueDelegateGetData(const TfLiteOpaqueDelegate* delegate) {
+  if (!delegate) return nullptr;
+
+  // The following cast is safe only because this code is part of the
+  // TF Lite runtime implementation.  Apps using TF Lite should not rely on
+  // 'TfLiteOpaqueDelegate' and 'TfLiteDelegate' being equivalent.
+  const auto* tflite_delegate =
+      reinterpret_cast<const TfLiteDelegate*>(delegate);
+
+  if (!tflite_delegate->opaque_delegate_builder) return tflite_delegate->data_;
+
+  return tflite_delegate->opaque_delegate_builder->data;
+}
+
 }  // extern "C"

third_party/tflite-micro/tensorflow/lite/core/c/common.h

@@ -42,6 +42,7 @@ limitations under the License.
 #ifndef TENSORFLOW_LITE_CORE_C_COMMON_H_
 #define TENSORFLOW_LITE_CORE_C_COMMON_H_
 
+#include <stdarg.h>
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -648,23 +649,26 @@ void TfLiteTensorReset(TfLiteType type, const char* name, TfLiteIntArray* dims,
 TfLiteStatus TfLiteTensorCopy(const TfLiteTensor* src, TfLiteTensor* dst);
 
 // Change the size of the memory block owned by `tensor` to `num_bytes`.
-// Tensors with allocation types other than kTfLiteDynamic will be ignored.
+// Tensors with allocation types other than `kTfLiteDynamic` will be ignored and
+// a kTfLiteOk will be returned.
 // `tensor`'s internal data buffer will be assigned a pointer
 // which can safely be passed to free or realloc if `num_bytes` is zero.
-// Behaviour is undefined if `tensor` is NULL.
 // If `preserve_data` is true, tensor data will be unchanged in the range from
-// the start of the region up to the minimum of the old and new sizes.
-void TfLiteTensorResizeMaybeCopy(size_t num_bytes, TfLiteTensor* tensor,
-                                 bool preserve_data);
+// the start of the region up to the minimum of the old and new sizes. In the
+// case of NULL tensor, or an error allocating new memory, returns
+// `kTfLiteError`.
+TfLiteStatus TfLiteTensorResizeMaybeCopy(size_t num_bytes, TfLiteTensor* tensor,
+                                         bool preserve_data);
 
 // Change the size of the memory block owned by `tensor` to `num_bytes`.
-// Tensors with allocation types other than kTfLiteDynamic will be ignored.
+// Tensors with allocation types other than kTfLiteDynamic will be ignored and
+// a kTfLiteOk will be returned.
 // `tensor`'s internal data buffer will be assigned a pointer
 // which can safely be passed to free or realloc if `num_bytes` is zero.
-// Behaviour is undefined if `tensor` is NULL.
 // Tensor data will be unchanged in the range from the start of the region up to
-// the minimum of the old and new sizes.
-void TfLiteTensorRealloc(size_t num_bytes, TfLiteTensor* tensor);
+// the minimum of the old and new sizes. In the case
+// of NULL tensor, or an error allocating new memory, returns `kTfLiteError`.
+TfLiteStatus TfLiteTensorRealloc(size_t num_bytes, TfLiteTensor* tensor);
 #endif  // TF_LITE_STATIC_MEMORY
 
 // WARNING: This is an experimental interface that is subject to change.
@@ -955,12 +959,53 @@ typedef struct TfLiteRegistration {
   // ops. We keep it inside of `TfLiteRegistration` and use it to route
   // callbacks properly.
   TfLiteRegistrationExternal* registration_external;
+
+  // Retrieves asynchronous kernel.
+  //
+  // If the `async_kernel` field is nullptr, it means the operation described by
+  // this TfLiteRegistration object does not support asynchronous execution.
+  // Otherwise, the function that the field points to should only be called for
+  // delegate kernel nodes, i.e. `node` should be a delegate kernel node created
+  // by applying a delegate.
+  // If the function returns nullptr, that means that the underlying delegate
+  // does not support asynchronous execution for this `node`.
+  struct TfLiteAsyncKernel* (*async_kernel)(TfLiteContext* context,
+                                            TfLiteNode* node);
 } TfLiteRegistration;
 
+/// \private
+// Old version of `TfLiteRegistration` to maintain binary backward
+// compatibility.
+// The legacy registration type must be a POD struct type whose field types must
+// be a prefix of the field types in TfLiteRegistration, and offset of the first
+// field in TfLiteRegistration that is not present in the legacy registration
+// type must be greater than or equal to the size of the legacy registration
+// type.
+// WARNING: This structure is deprecated / not an official part of the
+// API. It should be only used for binary backward compatibility.
+typedef struct TfLiteRegistration_V2 {
+  void* (*init)(TfLiteContext* context, const char* buffer, size_t length);
+  void (*free)(TfLiteContext* context, void* buffer);
+  TfLiteStatus (*prepare)(TfLiteContext* context, TfLiteNode* node);
+  TfLiteStatus (*invoke)(TfLiteContext* context, TfLiteNode* node);
+  const char* (*profiling_string)(const TfLiteContext* context,
+                                  const TfLiteNode* node);
+  int32_t builtin_code;
+  const char* custom_name;
+  int version;
+  TfLiteRegistrationExternal* registration_external;
+} TfLiteRegistration_V2;
+
+/// \private
 // Old version of `TfLiteRegistration` to maintain binary backward
 // compatibility.
-// WARNING: This structure is deprecated / not an official part of the API.
-// It should be only used for binary backward compatibility.
+// The legacy registration type must be a POD struct type whose field types must
+// be a prefix of the field types in TfLiteRegistration, and offset of the first
+// field in TfLiteRegistration that is not present in the legacy registration
+// type must be greater than or equal to the size of the legacy registration
+// type.
+// WARNING: This structure is deprecated / not an official part of the
+// API. It should be only used for binary backward compatibility.
 typedef struct TfLiteRegistration_V1 {
   void* (*init)(TfLiteContext* context, const char* buffer, size_t length);
   void (*free)(TfLiteContext* context, void* buffer);
@@ -1135,6 +1180,20 @@ TfLiteOpaqueDelegate* TfLiteOpaqueDelegateCreate(
 // 'delegate' is a null pointer.
 void TfLiteOpaqueDelegateDelete(TfLiteOpaqueDelegate* delegate);
 
+// Returns a pointer to the data associated with the provided opaque 'delegate'.
+//
+// A null pointer will be returned when:
+// - The 'delegate' is null.
+// - The 'data' field of the 'TfLiteOpaqueDelegateBuilder' used to construct the
+//   'delegate' was null.
+// - Or in case of any other error.
+// - The 'delegate' has been constructed via a 'TfLiteOpaqueDelegateBuilder',
+//   but the 'data' field of the 'TfLiteOpaqueDelegateBuilder' is null.
+//
+//  The data_ field of 'delegate' will be returned if the
+//  'opaque_delegate_builder' field is null.
+void* TfLiteOpaqueDelegateGetData(const TfLiteOpaqueDelegate* delegate);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif  // __cplusplus