SebastianBoblestETAS commented on code in PR #11183:
URL: https://github.com/apache/tvm/pull/11183#discussion_r867774761
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python/tvm/relay/frontend/tflite.py:
##########
@@ -2710,6 +2743,145 @@ def convert_unpack(self, op):
return squeezed
+ def convert_unidirectional_sequence_lstm(self, op):
+ """Long Short Term Memory for TFLite implementation."""
+ if self.is_quantized(op):
+ raise tvm.error.OpNotImplemented(
+ "TFlite quantized UNIDIRECTIONALSEQUENCELSTM operator is not
supported yet."
+ )
+
+ input_tensors = self.get_input_tensors(op)
+ assert len(input_tensors) >= 20, "input tensors length should be >= 20"
+
+ # Extract input tensor from saved model
+ input_tensor = input_tensors[0]
+
+ # Extract tensors from input tensors from saved model
+ # Input weights
+ input_input_weights = input_tensors[1]
+ input_forget_weights = input_tensors[2]
+ input_cell_weights = input_tensors[3]
+ input_output_weights = input_tensors[4]
+ # Recurrent weights
+ recurrent_input_weights = input_tensors[5]
+ recurrent_forget_weights = input_tensors[6]
+ recurrent_cell_weights = input_tensors[7]
+ recurrent_output_weights = input_tensors[8]
+ # Bias weights
+ input_gate_bias = input_tensors[12]
+ forget_gate_bias = input_tensors[13]
+ cell_gate_bias = input_tensors[14]
+ output_gate_bias = input_tensors[15]
+ # State input
Review Comment:
In all the models we checked, the tensors at locations 9, 10, 11 as well as
16, 17 and 20, 21, 22, 23 are not occupied. (get_input_tensors returns -1 for
their locations.)
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