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comparison python/x86.py @ 158:9683a4cd848f

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Added some functions for code generation
author Windel Bouwman
date Fri, 08 Mar 2013 16:52:44 +0100
parents 8f3924b6076e
children 10330be89bc2
comparison
equal deleted inserted replaced
157:8f3924b6076e 158:9683a4cd848f
1 import ppci 1 import ppci
2 import ir
3
4 class AsmLabel:
5 def __init__(self, lab):
6 self.lab = lab
7 def __repr__(self):
8 return '{0}:'.format(self.lab)
9
10 class Op:
11 def __init__(self, op, a, b):
12 self.op = op
13 self.a = a
14 self.b = b
15 def __repr__(self):
16 return '{0} {1}, {2}'.format(self.op, self.a, self.b)
2 17
3 class X86CodeGen: 18 class X86CodeGen:
4 def __init__(self, diag): 19 def __init__(self, diag):
5 self.diag = diag 20 self.diag = diag
6 21
22 def emit(self, i):
23 self.asm.append(i)
24
7 def genBin(self, i): 25 def genBin(self, i):
8 print(i) 26 self.asm = []
27 self.genModule(i)
9 28
29 def genModule(self, m):
30 for g in m.Globals:
31 self.emit(AsmLabel(g.name))
32 # Ignore types for now ..
33 self.emit('dw 0')
34 for f in m.Functions:
35 self.genFunction(f)
36 def genFunction(self, f):
37 self.emit('global {0}'.format(f.name))
38 self.emit(AsmLabel(f.name))
39 for bb in f.BasicBlocks:
40 self.genBB(bb)
41 def genBB(self, bb):
42 for i in bb.Instructions:
43 self.genIns(i)
44 def genIns(self, i):
45 if type(i) is ir.BinaryOperator:
46 if i.operation == 'fadd':
47 r = 'rax'
48 self.emit(Op('add', r, '11'))
49 elif type(i) is ir.RetInstruction:
50 self.emit('ret')
51 else:
52 print('Unknown ins', i)
53