Expose the fully_quantize flag for the new mlir quantizer

PiperOrigin-RevId: 314547190
Change-Id: I14dfb095eefb5f9a565f726eb1ea760a8d0129b7

tensorflow/lite/python/convert.py

@@ -108,15 +108,19 @@ class ConverterError(Exception):
   pass
 
 
-def mlir_quantize(input_data_str, disable_per_channel=False,
+def mlir_quantize(input_data_str,
+                  disable_per_channel=False,
+                  fully_quantize=False,
                   inference_type=_types_pb2.INT8):
   """Quantize `input_data_str` with calibration results.
 
   Args:
     input_data_str: Input data in serialized form (e.g. a TFLITE model with
       calibration results).
-    disable_per_channel: Bool indicating whether to do per-channel or
-                         per-tensor quantization
+    disable_per_channel: Bool indicating whether to do per-channel or per-tensor
+      quantization
+    fully_quantize: Bool indicating whether to fully quantize the model. Besides
+      model body, the input/output will be quantized as well.
     inference_type: Data type for the activations. The default value is int8.
 
   Returns:
@@ -125,6 +129,7 @@ def mlir_quantize(input_data_str, disable_per_channel=False,
   """
   return wrap_toco.wrapped_experimental_mlir_quantize(input_data_str,
                                                       disable_per_channel,
+                                                      fully_quantize,
                                                       inference_type)
 
 

tensorflow/lite/python/lite_test.py

@@ -32,6 +32,7 @@ from six.moves import range
 from tensorflow.lite.python import lite
 from tensorflow.lite.python import lite_constants
 from tensorflow.lite.python.convert import ConverterError
+from tensorflow.lite.python.convert import mlir_quantize
 from tensorflow.lite.python.interpreter import Interpreter
 from tensorflow.python import keras
 from tensorflow.python.client import session
@@ -1175,9 +1176,21 @@ class FromSessionTest(TestModels, parameterized.TestCase):
     converter._experimental_new_quantizer = True
     quantized_tflite = converter.convert()
     self.assertTrue(quantized_tflite)
-
     self.assertLess(len(quantized_tflite), len(float_tflite))
 
+    # calibration only api
+    converter._experimental_calibrate_only = True
+    calibrated_tflite = converter.convert()
+    quantized_tflite = mlir_quantize(calibrated_tflite, fully_quantize=True)
+    interpreter = Interpreter(model_content=quantized_tflite)
+    interpreter.allocate_tensors()
+    input_details = interpreter.get_input_details()
+    self.assertEqual(np.int8, input_details[0]['dtype'])
+    self.assertEqual((1., 0.), input_details[0]['quantization'])
+
+    output_details = interpreter.get_output_details()
+    self.assertEqual(np.int8, output_details[0]['dtype'])
+
   def testFloatTocoConverter(self):
     """Tests deprecated test TocoConverter."""
     with ops.Graph().as_default():

tensorflow/lite/python/wrap_toco.py

@@ -44,10 +44,11 @@ def wrapped_get_potentially_supported_ops():
 
 
 def wrapped_experimental_mlir_quantize(input_data_str, disable_per_channel,
-                                       inference_type):
+                                       fully_quantize, inference_type):
   """Wraps experimental mlir quantize model."""
   return _pywrap_toco_api.ExperimentalMlirQuantizeModel(input_data_str,
                                                         disable_per_channel,
+                                                        fully_quantize,
                                                         inference_type)
 
 

tensorflow/lite/toco/python/toco_python_api.cc

@@ -264,11 +264,13 @@ PyObject* MlirQuantizeModel(PyObject* data, bool disable_per_channel,
     default:
       return nullptr;
   }
+  tflite::TensorType inference_io_type =
+      fully_quantize ? inference_tensor_type : tflite::TensorType_FLOAT32;
   flatbuffers::FlatBufferBuilder builder;
   auto status = mlir::lite::QuantizeModel(
-      *tflite_model, tflite::TensorType::TensorType_FLOAT32,
-      tflite::TensorType::TensorType_FLOAT32, inference_tensor_type, {},
-      disable_per_channel, fully_quantize, &builder, error_reporter.get());
+      *tflite_model, inference_io_type, inference_io_type,
+      inference_tensor_type, {}, disable_per_channel, fully_quantize, &builder,
+      error_reporter.get());
 
   if (status != kTfLiteOk) {
     error_reporter->exception();