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comparison python/target/basetarget.py @ 335:582a1aaa3983

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Added long branch format
author Windel Bouwman
date Mon, 17 Feb 2014 20:41:30 +0100
parents 6f4753202b9a
children 4d204f6f7d4e
comparison
equal deleted inserted replaced
334:6f4753202b9a 335:582a1aaa3983
56 56
57 57
58 class Instruction: 58 class Instruction:
59 """ Base instruction class """ 59 """ Base instruction class """
60 def encode(self): 60 def encode(self):
61 raise NotImplementedError('Instruction {0} has no encode yet, TODO'.format(type(self))) 61 return bytes()
62 62
63 def resolve(self, f): 63 def relocations(self):
64 pass 64 return []
65
66 def symbols(self):
67 return []
65 68
66 69
67 class Nop(Instruction): 70 class Nop(Instruction):
68 """ Instruction that does nothing and has zero size """ 71 """ Instruction that does nothing and has zero size """
69 def encode(self): 72 def encode(self):
75 78
76 79
77 class Label(PseudoInstruction): 80 class Label(PseudoInstruction):
78 def __init__(self, name): 81 def __init__(self, name):
79 self.name = name 82 self.name = name
80 self.address = 0
81 83
82 def __repr__(self): 84 def __repr__(self):
83 return '{}:'.format(self.name) 85 return '{}:'.format(self.name)
84 86
85 def encode(self): 87 def symbols(self):
86 return bytes() 88 return [self.name]
87 89
88 @classmethod 90 @classmethod
89 def Create(cls, vop): 91 def Create(cls, vop):
90 if type(vop) is ASymbol: 92 if type(vop) is ASymbol:
91 name = vop.name 93 name = vop.name
110 def __repr__(self): 112 def __repr__(self):
111 return 'ALIGN({})'.format(self.align) 113 return 'ALIGN({})'.format(self.align)
112 114
113 def encode(self): 115 def encode(self):
114 pad = [] 116 pad = []
115 address = self.address 117 # TODO
118 address = 0
116 while (address % self.align) != 0: 119 while (address % self.align) != 0:
117 address += 1 120 address += 1
118 pad.append(0) 121 pad.append(0)
119 return bytes(pad) 122 return bytes(pad)
120 123
123 def __init__(self, i): 126 def __init__(self, i):
124 self.info = i 127 self.info = i
125 128
126 def __repr__(self): 129 def __repr__(self):
127 return 'DebugInfo: {}'.format(self.info) 130 return 'DebugInfo: {}'.format(self.info)
128
129 def encode(self):
130 return bytes()
131 131
132 132
133 class Register(Operand): 133 class Register(Operand):
134 def __init__(self, name): 134 def __init__(self, name):
135 self.name = name 135 self.name = name