Mercurial > lcfOS
comparison python/ppci/irmach.py @ 301:6753763d3bec
merge codegen into ppci package
| author | Windel Bouwman |
|---|---|
| date | Thu, 05 Dec 2013 17:02:38 +0100 |
| parents | python/irmach.py@674789d9ff37 |
| children | e9fe6988497c |
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| 300:158068af716c | 301:6753763d3bec |
|---|---|
| 1 | |
| 2 """ | |
| 3 Abstract assembly language instructions. | |
| 4 | |
| 5 This is the second intermediate representation. | |
| 6 | |
| 7 Instructions are selected and scheduled at this stage. | |
| 8 """ | |
| 9 | |
| 10 from target import Instruction | |
| 11 | |
| 12 | |
| 13 class Frame: | |
| 14 """ | |
| 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 = [] | |
| 22 self.stacksize = 0 | |
| 23 | |
| 24 def __repr__(self): | |
| 25 return 'Frame {}'.format(self.name) | |
| 26 | |
| 27 def lower_to(self, outs): | |
| 28 for im in self.instructions: | |
| 29 if isinstance(im.assem, Instruction): | |
| 30 outs.emit(im.assem) | |
| 31 else: | |
| 32 outs.emit(im.assem.fromim(im)) | |
| 33 | |
| 34 | |
| 35 class AbstractInstruction: | |
| 36 """ | |
| 37 Abstract machine instruction class. This is a very simple | |
| 38 abstraction of machine instructions. | |
| 39 """ | |
| 40 def __init__(self, cls, ops=(), src=(), dst=(), jumps=(), others=(), ismove=False): | |
| 41 assert type(cls) is type or isinstance(cls, Instruction) | |
| 42 self.assem = cls | |
| 43 self.ops = tuple(ops) | |
| 44 self.src = tuple(src) | |
| 45 self.dst = tuple(dst) | |
| 46 self.jumps = tuple(jumps) | |
| 47 self.others = tuple(others) | |
| 48 self.ismove = ismove | |
| 49 | |
| 50 def __repr__(self): | |
| 51 return self.render() | |
| 52 | |
| 53 def render(self): | |
| 54 """ | |
| 55 Substitutes source, dst and labels in the string | |
| 56 """ | |
| 57 x = str(self.assem) | |
| 58 for i, s in enumerate(self.src): | |
| 59 p = '%s{}'.format(i) | |
| 60 x = x.replace(p, str(s)) | |
| 61 for i, d in enumerate(self.dst): | |
| 62 p = '%d{}'.format(i) | |
| 63 x = x.replace(p, str(d)) | |
| 64 for i, j in enumerate(self.jumps): | |
| 65 p = '%l{}'.format(i) | |
| 66 x = x.replace(p, str(j)) | |
| 67 return x | |
| 68 | |
| 69 | |
| 70 makeIns = AbstractInstruction |