Mercurial > lcfOS
annotate python/ppci/irmach.py @ 334:6f4753202b9a
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| author | Windel Bouwman |
|---|---|
| date | Thu, 13 Feb 2014 22:02:08 +0100 |
| parents | e9fe6988497c |
| children | 86b02c98a717 |
| rev | line source |
|---|---|
| 261 | 1 |
| 269 | 2 """ |
| 270 | 3 Abstract assembly language instructions. |
| 4 | |
| 5 This is the second intermediate representation. | |
| 6 | |
| 7 Instructions are selected and scheduled at this stage. | |
| 269 | 8 """ |
| 261 | 9 |
| 299 | 10 from target import Instruction |
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| 277 | 12 |
| 274 | 13 class Frame: |
| 323 | 14 """ |
| 274 | 15 Activation record abstraction. This class contains a flattened |
| 16 function. Instructions are selected and scheduled at this stage. | |
| 17 Frames differ per machine. | |
| 18 """ | |
| 19 def __init__(self, name): | |
| 20 self.name = name | |
| 21 self.instructions = [] | |
| 275 | 22 self.stacksize = 0 |
| 274 | 23 |
| 24 def __repr__(self): | |
| 275 | 25 return 'Frame {}'.format(self.name) |
| 274 | 26 |
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27 def lower_to(self, outs): |
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28 for im in self.instructions: |
| 299 | 29 if isinstance(im.assem, Instruction): |
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30 outs.emit(im.assem) |
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31 else: |
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32 outs.emit(im.assem.fromim(im)) |
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33 |
| 261 | 34 |
| 268 | 35 class AbstractInstruction: |
| 274 | 36 """ |
| 37 Abstract machine instruction class. This is a very simple | |
| 38 abstraction of machine instructions. | |
| 39 """ | |
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40 def __init__(self, cls, ops=(), src=(), dst=(), jumps=(), others=(), ismove=False): |
| 299 | 41 assert type(cls) is type or isinstance(cls, Instruction) |
| 277 | 42 self.assem = cls |
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43 self.ops = tuple(ops) |
| 268 | 44 self.src = tuple(src) |
| 45 self.dst = tuple(dst) | |
| 46 self.jumps = tuple(jumps) | |
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47 self.others = tuple(others) |
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48 self.ismove = ismove |
| 268 | 49 |
| 50 def __repr__(self): | |
| 275 | 51 return self.render() |
| 52 | |
| 53 def render(self): | |
| 54 """ | |
| 55 Substitutes source, dst and labels in the string | |
| 56 """ | |
| 323 | 57 if isinstance(self.assem, Instruction): |
| 58 x = str(self.assem) | |
| 59 else: | |
| 60 cn = self.assem.__name__ | |
| 61 x = '{}, def={}, use={}, other={}' | |
| 62 x = x.format(cn, self.dst, self.src, self.others) | |
| 275 | 63 return x |
| 299 | 64 |
| 65 | |
| 66 makeIns = AbstractInstruction |