Mercurial > lcfOS

comparison python/target/armtoken.py @ 341:4d204f6f7d4e devel

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Rewrite of assembler parts
author Windel Bouwman
date Fri, 28 Feb 2014 18:07:14 +0100
parents c7cc54c0dfdf
children
comparison
equal deleted inserted replaced
340:c7cc54c0dfdf 341:4d204f6f7d4e
1
2 import struct
3
4 def u16(h):
5 return struct.pack('<H', h)
1 6
2 def val2bit(v, bits): 7 def val2bit(v, bits):
3 b = [] 8 b = []
4 for i in range(bits): 9 for i in range(bits):
5 b.append(bool((1<<i) & v)) 10 b.append(bool((1<<i) & v))
12 def setter(s, v): 17 def setter(s, v):
13 s[b:e] = v 18 s[b:e] = v
14 return property(getter, setter) 19 return property(getter, setter)
15 20
16 21
17 class ThumbToken: 22 class Token:
18 def __init__(self):
19 self.bit_value = 0
20
21 def set_bit(self, i, value): 23 def set_bit(self, i, value):
22 value = bool(value) 24 value = bool(value)
23 assert i in range(0, 16) 25 assert i in range(0, 16)
24 mask = 1 << i 26 mask = 1 << i
25 if value: 27 if value:
40 for i in range(key.start, key.stop): 42 for i in range(key.start, key.stop):
41 self.set_bit(i, value_bits[i - key.start]) 43 self.set_bit(i, value_bits[i - key.start])
42 else: 44 else:
43 raise KeyError() 45 raise KeyError()
44 46
47 class ThumbToken(Token):
48 def __init__(self):
49 self.bit_value = 0
50
51
45 rd = bit_range(0, 3) 52 rd = bit_range(0, 3)
46 53
47 def encode(self): 54 def encode(self):
48 return u16(self.bit_value) 55 return u16(self.bit_value)
49 56
50 57
51 class ArmToken: 58 class ArmToken(Token):
52 pass 59 def __init__(self):
60 self.bit_value = 0
53 61