vesion 0.4.4

Fix wrapping and scaling issue #44.

changelog.txt

@@ -1,3 +1,7 @@
+version 0.4.4
+--------------------------------------------------
+* Fix wrapping and scaling issue #44.
+
 version 0.4.3
 --------------------------------------------------
 * Fxp adds `config` as optional init parameter (kwarg).

fxpmath/__init__.py

@@ -1,4 +1,4 @@
-__version__ = '0.4.3'
+__version__ = '0.4.4'
 
 import sys
 import os

fxpmath/objects.py

@@ -166,6 +166,7 @@ def __init__(self, val=None, signed=None, n_word=None, n_frac=None, n_int=None,
         # scaling
         if self.scale is None: self.scale = kwargs.pop('scale', 1)
         if self.bias is None: self.bias = kwargs.pop('bias', 0)
+        self.scaled = True if self.scale != 1 or self.bias != 0 else False
 
         # check if val is a raw value
         if raw is None: raw = kwargs.pop('raw', False)
@@ -542,9 +543,15 @@ def _format_inupt_val(self, val, return_sizes=False, raw=False):
         # scaling conversion
         self.scaled = False
         if self.scale is not None and self.bias is not None and not raw:
-            if self.scale != 1 or self.bias != 0:
+            if self.bias != 0:
                 self.scaled = True
-                val = (val - self.bias) / self.scale
+                val = val - self.bias
+            if self.scale != 1:
+                self.scaled = True
+                val = val / self.scale
+            # check if it is a numpy array
+            if not isinstance(val, (np.ndarray, np.generic)):
+                val = np.array(val)
 
         if return_sizes:
             return val, vdtype, raw, signed, n_word, n_frac

tests/test_issues.py

@@ -52,12 +52,10 @@ def test_issue_14_v0_3_7():
             True, n_word=128, n_frac=125, rounding='around', raw=True)
     assert d.bin() == '00000000000000000000001011101010110101011101010101010101010101010101010101010101001010101010101010101001010101001010101010101010'
 
-
 def test_issue_15_v0_3_7():
     x = Fxp('0xb', True, 10, 4)
     assert x.hex() == '0x00B'
 
-
 def test_issue_17_v0_3_7():
     a = Fxp(15, signed=False)
     b = a ** Fxp(2)
@@ -157,4 +155,36 @@ def test_issue_41_v0_4_2():
 def test_issue_42_v0_4_2():
     b = Fxp(2, True, 4, 0, overflow='wrap')
     assert (b + 8)() == -6.0
-    assert (b - 8)() == -6.0
+    assert (b - 8)() == -6.0
+
+def test_issue_44_v0_4_3():
+    # 1a
+    b = Fxp(20.5, False, n_word=5, scaling=1, bias=8)
+    assert b() == 20.5
+
+    # 1b
+    b = Fxp(20.5, False, n_word=4, scaling=1, bias=8)
+    assert b() == 20
+    b = Fxp(20.5, False, n_word=4, n_frac=1, scaling=1, bias=8)
+    assert b() == 15.5
+
+    # 2
+    zero = Fxp(0.0, False, n_word=5, overflow='wrap', scaling=1, bias=8)
+    assert zero() == 32
+    zero = Fxp(0.0, False, n_word=5, n_frac=1, overflow='wrap', scaling=1, bias=8)
+    assert zero() == 16.0
+    assert zero.upper == 23.5
+    assert zero.lower == 8.0
+
+    # 3
+    b = Fxp(0, False, 64, 0, overflow='wrap', bias=8)
+    assert b() == 2**64
+    b = Fxp(8, False, 64, 0, overflow='wrap', bias=8)
+    assert b() == 8
+    b = Fxp(2**64 + 7, False, 64, 0, overflow='wrap', bias=8)
+    assert b() == 2**64 + 7
+    b = Fxp(2**64 + 8, False, 64, 0, overflow='wrap', bias=8)
+    assert b() == 8
+
+    b = Fxp(2**64+6, False, 64, 0, overflow='wrap', scaling=2, bias=8)
+    assert b() == 2**64+6