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comparison python/ppci/target/arm/__init__.py @ 386:2a970e7270e2

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Added repeat assembler macro
author Windel Bouwman
date Thu, 01 May 2014 17:40:59 +0200
parents 6df89163e114
children c0d9837acde8
comparison
equal deleted inserted replaced
385:d056b552d3f4 386:2a970e7270e2
19 def __init__(self, target): 19 def __init__(self, target):
20 super().__init__(target) 20 super().__init__(target)
21 self.target.add_keyword('section') 21 self.target.add_keyword('section')
22 self.target.add_instruction(['section', 'ID'], 22 self.target.add_instruction(['section', 'ID'],
23 lambda rhs: self.select_section(rhs[1].val)) 23 lambda rhs: self.select_section(rhs[1].val))
24 self.target.add_keyword('repeat')
25 self.target.add_keyword('endrepeat')
26 self.target.add_instruction(['repeat', 'imm32'], self.begin_repeat)
27 self.target.add_instruction(['endrepeat'], self.end_repeat)
28
24 self.make_parser() 29 self.make_parser()
25 self.lit_pool = [] 30 self.lit_pool = []
26 self.lit_counter = 0 31 self.lit_counter = 0
32 self.inMacro = False
33
34 def prepare(self):
35 self.inMacro = False
36
37 def begin_repeat(self, rhs):
38 if self.inMacro:
39 raise Exception()
40 self.inMacro = True
41 self.rep_count = rhs[1]
42 self.recording = []
43
44 def end_repeat(self, rhs):
45 if not self.inMacro:
46 raise Exception()
47 self.inMacro = False
48 for rec in self.recording * self.rep_count:
49 self.emit(*rec)
50
51 def emit(self, *args):
52 if self.inMacro:
53 self.recording.append(args)
54 else:
55 super().emit(*args)
27 56
28 def select_section(self, name): 57 def select_section(self, name):
29 self.flush() 58 self.flush()
30 self.stream.select_section(name) 59 self.stream.select_section(name)
31 60
32 def flush(self): 61 def flush(self):
62 if self.inMacro:
63 raise Exception()
33 while self.lit_pool: 64 while self.lit_pool:
34 i = self.lit_pool.pop(0) 65 i = self.lit_pool.pop(0)
35 self.emit(i) 66 self.emit(i)
36 67
37 def add_literal(self, v): 68 def add_literal(self, v):
40 self.lit_counter += 1 71 self.lit_counter += 1
41 label_name = "_lit_{}".format(self.lit_counter) 72 label_name = "_lit_{}".format(self.lit_counter)
42 self.lit_pool.append(Label(label_name)) 73 self.lit_pool.append(Label(label_name))
43 self.lit_pool.append(Dcd(v)) 74 self.lit_pool.append(Dcd(v))
44 return label_name 75 return label_name
76
45 77
46 class ArmTarget(Target): 78 class ArmTarget(Target):
47 def __init__(self): 79 def __init__(self):
48 super().__init__('arm') 80 super().__init__('arm')
49 self.make_parser() 81 self.make_parser()