def slice_to_SLICE(sliceVals, width):
"""convert python slice to value of SLICE hdl type"""
if sliceVals.step is not None:
raise NotImplementedError()
start = sliceVals.start
stop = sliceVals.stop
if sliceVals.start is None:
start = INT.fromPy(width)
else:
start = toHVal(sliceVals.start)
if sliceVals.stop is None:
stop = INT.fromPy(0)
else:
stop = toHVal(sliceVals.stop)
startIsVal = isinstance(start, Value)
stopIsVal = isinstance(stop, Value)
indexesAreValues = startIsVal and stopIsVal
if indexesAreValues:
updateTime = max(start.updateTime, stop.updateTime)
else:
updateTime = -1
return Slice.getValueCls()((start, stop), SLICE, 1, updateTime)
def test_int_neg(self):
self.assertEqual(int(INT.fromPy(-10)), -10)
self.assertEqual(int(-INT.fromPy(10)), -10)
self.assertEqual(int(-INT.fromPy(10)), -10)
v = -INT.fromPy(None)
self.assertEqual(v.val, 0)
self.assertEqual(v.vldMask, 0)
def test_int_neg(self):
self.assertEqual(int(INT.fromPy(-10)), -10)
self.assertEqual(int(-INT.fromPy(10)), -10)
self.assertEqual(int(-INT.fromPy(10)), -10)
v = -INT.fromPy(None)
self.assertEqual(v.val, 0)
self.assertEqual(v.vldMask, 0)
def test_int_to_bool(self):
self.assertFalse(bool(INT.fromPy(0)._auto_cast(BOOL)))
self.assertTrue(bool(INT.fromPy(1)._auto_cast(BOOL)))
self.assertTrue(bool(INT.fromPy(-11)._auto_cast(BOOL)))
self.assertTrue(bool(INT.fromPy(500)._auto_cast(BOOL)))
with self.assertRaises(ValueError):
bool(INT.fromPy(None)._auto_cast(BOOL))
def test_int_to_bool(self):
self.assertFalse(bool(INT.fromPy(0)._auto_cast(BOOL)))
self.assertTrue(bool(INT.fromPy(1)._auto_cast(BOOL)))
self.assertTrue(bool(INT.fromPy(-11)._auto_cast(BOOL)))
self.assertTrue(bool(INT.fromPy(500)._auto_cast(BOOL)))
with self.assertRaises(ValueError):
bool(INT.fromPy(None)._auto_cast(BOOL))
def __setitem__(self, index, value):
"""
Only syntax sugar for user, not used inside HWT
* In HW design is not used (__getitem__ returns "reference"
and it is used)
* In simulator is used _setitem__val directly
"""
if isinstance(index, int):
index = INT.fromPy(index)
else:
assert isinstance(self, Value)
assert index._dtype == INT, index._dtype
if not isinstance(value, Value):
value = self._dtype.elmType.fromPy(value)
else:
assert value._dtype == self._dtype.elmType, (value._dtype,
self._dtype.elmType)
return self._setitem__val(index, value)
def hInt(pyVal):
""" create hdl integer value (for example integer value in vhdl)"""
return INT.fromPy(pyVal)