1 files changed, 83 insertions, 0 deletions
diff --git a/tensorflow/contrib/lite/kernels/internal/kernel_utils.h b/tensorflow/contrib/lite/kernels/internal/kernel_utils.h
index f3f42f0840..2a11b37a60 100644
--- a/tensorflow/contrib/lite/kernels/internal/kernel_utils.h
+++ b/tensorflow/contrib/lite/kernels/internal/kernel_utils.h
@@ -92,6 +92,89 @@ void LstmStep(
     float* forget_gate_scratch, float* cell_scratch, float* output_gate_scratch,
     float* output_ptr_batch);
 
+// Same as above but with quantized weight matrices. In detail:
+// Input of size 'n_batch * n_input':
+//   input_ptr_batch
+//
+// LSTM weights:
+// Quantized input weights of size 'n_cell * n_input':
+//   input_to_input_weights            - optional (can be nullptr)
+//   input_to_forget_weights
+//   input_to_cell_weights
+//   input_to_input_weights
+// Quantized recurrent weights of size 'n_cell * n_output':
+//   recurrent_to_input_weights        - optional
+//   recurrent_to_forget_weights
+//   recurrent_to_cell_weights
+//   recurrent_to_input_weights
+// Quantized peephole weights of size 'n_cell', representing diagonal matrices.
+//   cell_to_input_weights             - optional
+//   cell_to_cell_weights              - optional
+//   cell_to_output_weights            - optional
+// Quantized projection weights of size 'n_output * n_cell'
+//   projection_weights_ptr            - optional
+// Weight scales (scalars) for each of the weights above.
+//   input_to_input_weights_scale      - optional
+//   input_to_forget_weights_scale
+//   input_to_cell_weights_scale
+//   input_to_output_weights_scale
+//   recurrent_to_input_weights_scale  - optional
+//   recurrent_to_forget_weights_scale
+//   recurrent_to_cell_weights_scale
+//   recurrent_to_output_weights_scale
+//   cell_to_input_weights_scale,
+//   cell_to_forget_weights_scale,
+//   cell_to_output_weights_scale,
+//   projection_weights_scale          - optional
+// Gate biases of size 'n_cell':
+//   input_gate_bias_ptr               - optional
+//   forget_gate_bias_ptr
+//   cell_gate_bias_ptr
+//   output_gate_bias_ptr
+//
+// Temporary pre-allocated storage for quantized values:
+//   quantized_input_ptr_batch (same size as input_ptr_batch)
+//   quantized_output_state_ptr (same size as output_state_ptr)
+//   quantized_cell_state_ptr (same size as cell_state_ptr)
+// Temporary pre-allocated storage for recovered values:
+//   recovered_cell_weights (same size as cell_to_*_weights)
+//
+// Outputs:
+//   output_state_ptr - size 'n_batch * n_output'
+//   cell_state_ptr   - size 'n_batch * n_cell'
+//   output_ptr_batch - size 'n_batch * n_output'
+void LstmStep(
+    const float* input_ptr_batch, const int8_t* input_to_input_weights_ptr,
+    float input_to_input_weights_scale,
+    const int8_t* input_to_forget_weights_ptr,
+    float input_to_forget_weights_scale,
+    const int8_t* input_to_cell_weights_ptr, float input_to_cell_weights_scale,
+    const int8_t* input_to_output_weights_ptr,
+    float input_to_output_weights_scale,
+    const int8_t* recurrent_to_input_weights_ptr,
+    float recurrent_to_input_weights_scale,
+    const int8_t* recurrent_to_forget_weights_ptr,
+    float recurrent_to_forget_weights_scale,
+    const int8_t* recurrent_to_cell_weights_ptr,
+    float recurrent_to_cell_weights_scale,
+    const int8_t* recurrent_to_output_weights_ptr,
+    float recurrent_to_output_weights_scale,
+    const int8_t* cell_to_input_weights_ptr, float cell_to_input_weights_scale,
+    const int8_t* cell_to_forget_weights_ptr,
+    float cell_to_forget_weights_scale,
+    const int8_t* cell_to_output_weights_ptr,
+    float cell_to_output_weights_scale, const float* input_gate_bias_ptr,
+    const float* forget_gate_bias_ptr, const float* cell_bias_ptr,
+    const float* output_gate_bias_ptr, const int8_t* projection_weights_ptr,
+    float projection_weights_scale, const float* projection_bias_ptr,
+    const TfLiteLSTMParams* params, int n_batch, int n_cell, int n_input,
+    int n_output, float* input_gate_scratch, float* forget_gate_scratch,
+    float* cell_scratch, float* output_gate_scratch, float* scaling_factors,
+    float* product_scaling_factors, float* recovered_cell_weights,
+    int8_t* quantized_input_ptr_batch, int8_t* quantized_output_state_ptr,
+    int8_t* quantized_cell_state_ptr, float* output_state_ptr,
+    float* cell_state_ptr, float* output_ptr_batch);
+
 }  // namespace kernel_utils
 }  // namespace tflite
 #endif  // TENSORFLOW_CONTRIB_LITE_KERNELS_INTERNAL_KERNEL_UTILS_H_