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comparison python/ppci/target/token.py @ 394:988f3fb861e4

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c3 code generator rewrite
author Windel Bouwman
date Thu, 22 May 2014 08:14:12 +0200
parents 86b02c98a717
children c0d9837acde8
comparison
equal deleted inserted replaced
393:6ae782a085e0 394:988f3fb861e4
11 11
12 def val2bit(v, bits): 12 def val2bit(v, bits):
13 b = [] 13 b = []
14 for i in range(bits): 14 for i in range(bits):
15 b.append(bool((1<<i) & v)) 15 b.append(bool((1<<i) & v))
16 #b.reverse()
17 return b 16 return b
18 17
19 18
20 def bit_range(b, e): 19 def bit_range(b, e):
21 """ Property generator function """ 20 """ Property generator function """
46 if type(key) is int: 45 if type(key) is int:
47 self.set_bit(key, value) 46 self.set_bit(key, value)
48 elif type(key) is slice: 47 elif type(key) is slice:
49 assert key.step is None 48 assert key.step is None
50 bits = key.stop - key.start 49 bits = key.stop - key.start
50 assert value < (2**bits)
51 value_bits = val2bit(value, bits) 51 value_bits = val2bit(value, bits)
52 for i in range(key.start, key.stop): 52 for i in range(key.start, key.stop):
53 self.set_bit(i, value_bits[i - key.start]) 53 self.set_bit(i, value_bits[i - key.start])
54 else: 54 else:
55 raise KeyError() 55 raise KeyError()