def check_extsign(a, b):
if isinstance(b, FieldSelectableInt):
b = b.get_range()
+ if isinstance(b, int):
+ return SelectableInt(b, a.bits)
if b.bits != 256:
return b
return SelectableInt(b.value, a.bits)
def __getitem__(self, key):
print ("getitem", key, self.br)
- key = self.br[key] # don't do POWER 1.3.4 bit-inversion
- return self.si[key]
+ if isinstance(key, SelectableInt):
+ key = key.value
+ if isinstance(key, int):
+ key = self.br[key] # don't do POWER 1.3.4 bit-inversion
+ return self.si[key]
+ if isinstance(key, slice):
+ key = self.br[key]
+ return selectconcat(*[self.si[x] for x in key])
def __setitem__(self, key, value):
+ if isinstance(key, SelectableInt):
+ key = key.value
key = self.br[key] # don't do POWER 1.3.4 bit-inversion
- return self.si.__setitem__(key, value)
+ if isinstance(key, int):
+ return self.si.__setitem__(key, value)
+ else:
+ if not isinstance(value, SelectableInt):
+ value = SelectableInt(value, bits=len(key))
+ for i, k in enumerate(key):
+ self.si[k] = value[i]
def __negate__(self):
return self._op1(negate)
print (c)
#self.assertEqual(c.value, a.value + b.value)
+ def test_select(self):
+ a = SelectableInt(0b00001111, 8)
+ br = BitRange()
+ br[0] = 0
+ br[1] = 1
+ br[2] = 4
+ br[3] = 5
+ fs = FieldSelectableInt(a, br)
+
+ self.assertEqual(fs.get_range(), 0b0011)
+
+ def test_select_range(self):
+ a = SelectableInt(0b00001111, 8)
+ br = BitRange()
+ br[0] = 0
+ br[1] = 1
+ br[2] = 4
+ br[3] = 5
+ fs = FieldSelectableInt(a, br)
+
+ self.assertEqual(fs[2:4], 0b11)
+
+ fs[0:2] = 0b10
+ self.assertEqual(fs.get_range(), 0b1011)
+
+
class SelectableInt:
def __init__(self, value, bits):
+ if isinstance(value, SelectableInt):
+ value = value.value
mask = (1 << bits) - 1
self.value = value & mask
self.bits = bits
assert b.bits == self.bits
return SelectableInt(self.value - b.value, self.bits)
+ def __rsub__(self, b):
+ if isinstance(b, int):
+ b = SelectableInt(b, self.bits)
+ b = check_extsign(self, b)
+ assert b.bits == self.bits
+ return SelectableInt(b.value - self.value, self.bits)
+
+ def __radd__(self, b):
+ if isinstance(b, int):
+ b = SelectableInt(b, self.bits)
+ b = check_extsign(self, b)
+ assert b.bits == self.bits
+ return SelectableInt(b.value + self.value, self.bits)
+
def __mul__(self, b):
b = check_extsign(self, b)
assert b.bits == self.bits
assert b.bits == self.bits
return SelectableInt(self.value ^ b.value, self.bits)
+ def __rxor__(self, b):
+ b = check_extsign(self, b)
+ assert b.bits == self.bits
+ return SelectableInt(self.value ^ b.value, self.bits)
+
def __invert__(self):
return SelectableInt(~self.value, self.bits)
def __neg__(self):
return SelectableInt(~self.value + 1, self.bits)
+ def __lshift__(self, b):
+ b = check_extsign(self, b)
+ return SelectableInt(self.value << b.value, self.bits)
+
+ def __rshift__(self, b):
+ b = check_extsign(self, b)
+ return SelectableInt(self.value >> b.value, self.bits)
+
def __getitem__(self, key):
if isinstance(key, int):
assert key < self.bits, "key %d accessing %d" % (key, self.bits)
assert other.bits == self.bits
other = other.value
if isinstance(other, int):
- return other >= self.value
+ return onebit(self.value >= other.value)
assert False
def __le__(self, other):
assert other.bits == self.bits
other = other.value
if isinstance(other, int):
- return onebit(other <= self.value)
+ return onebit(self.value <= other)
assert False
def __gt__(self, other):
assert other.bits == self.bits
other = other.value
if isinstance(other, int):
- return onebit(other > self.value)
+ return onebit(self.value > other)
assert False
def __lt__(self, other):
assert other.bits == self.bits
other = other.value
if isinstance(other, int):
- return onebit(other < self.value)
+ return onebit(self.value < other)
assert False
def __eq__(self, other):
return "SelectableInt(value=0x{:x}, bits={})".format(self.value,
self.bits)
+ def __len__(self):
+ return self.bits
+
def onebit(bit):
return SelectableInt(1 if bit else 0, 1)
args = tmp
res = copy(args[0])
for i in args[1:]:
+ if isinstance(i, FieldSelectableInt):
+ i = i.si
assert isinstance(i, SelectableInt), "can only concat SIs, sorry"
res.bits += i.bits
res.value = (res.value << i.bits) | i.value
b = eval(repr(a))
self.assertEqual(a, b)
+ def test_cmp(self):
+ a = SelectableInt(10, bits=8)
+ b = SelectableInt(5, bits=8)
+ self.assertTrue(a > b)
+ self.assertFalse(a < b)
+ self.assertTrue(a != b)
+ self.assertFalse(a == b)
+
+ def test_unsigned(self):
+ a = SelectableInt(0x80, bits=8)
+ b = SelectableInt(0x7f, bits=8)
+ self.assertTrue(a > b)
+ self.assertFalse(a < b)
+ self.assertTrue(a != b)
+ self.assertFalse(a == b)
+
if __name__ == "__main__":
unittest.main()