map qkeras quantized_bits(n, m) -> ap_fixed<n,m+1>

Author: jmduarte

hls4ml/converters/keras/qkeras.py

@@ -72,7 +72,7 @@ def get_type(quantizer_config):
         else:
             return IntegerPrecisionType(width=width, signed=True)
     else:
-        return FixedPrecisionType(width=width+1, integer=integer+1, signed=True)
+        return FixedPrecisionType(width=width, integer=integer+1, signed=True)
 
 def get_quantizer_from_config(keras_layer, quantizer_var):
     quantizer_config = keras_layer['config']['{}_quantizer'.format(quantizer_var)]

hls4ml/utils/config.py

@@ -35,7 +35,7 @@ def _get_precision_from_quantizer(quantizer):
 
     supported_quantizers = ['quantized_bits', 'quantized_relu', 'quantized_tanh', 'quantized_po2', 'quantized_relu_po2']
     if quantizer['class_name'] in supported_quantizers:
-        bits = int(quantizer['config']['bits']) + 1
+        bits = int(quantizer['config']['bits'])
         # if integer isn't specified, it should be the same as bits
         integer = int(quantizer['config'].get('integer', bits-1)) + 1