Add quantize function and enums

Closes #194 (closed)

b_asic/quantization.py

@@ -13,6 +13,7 @@ class Quantization(Enum):
     TRUNCATION = 2
     MAGNITUDE_TRUNCATION = 3
     JAMMING = 4
+    UNBIASED_ROUNDING = 5
 
 
 class Overflow(Enum):
@@ -38,7 +39,7 @@ def quantize(
     fractional_bits : int
     integer_bits : int, default: 1
     quantization : Quantization, default: Quantization.TRUNCATION
-    overflow : Overflow, default: Overflow.SATURATION
+    overflow : Overflow, default: Overflow.TWOS_COMPLEMENT
 
     Returns
     -------
@@ -73,8 +74,10 @@ def quantize(
             v = math.floor(v)
         else:
             v = math.ceil(v)
-    else:  # Quantization.JAMMING
+    elif quantization is Quantization.JAMMING:
         v = math.floor(v) | 1
+    else:  # Quantization.UNBIASED_ROUNDING
+        v = round(v)
 
     # TODO: overflow handling