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comparison python/codegenarm.py @ 211:99164160fb0b

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Added another missing file
author Windel Bouwman
date Sat, 29 Jun 2013 10:10:45 +0200
parents
children 62386bcee1ba
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210:67b0feafe5ae 211:99164160fb0b
1 import ir
2 from asmnodes import ALabel
3 import arm_cm3 as arm
4 from ppci import CompilerError
5
6 class ArmCodeGenerator:
7 """ Simple code generator """
8 def __init__(self, out):
9 self.outs = out
10
11 def emit(self, item):
12 self.outs.emit(item)
13
14 def generate(self, ircode):
15 assert isinstance(ircode, ir.Module)
16 print('ARM code generation')
17 self.outs.selectSection('data')
18
19 for gvar in ircode.Variables:
20 self.emit(ALabel(gvar.name))
21 # TODO: use initial value:
22 self.emit(arm.dcd_ins(0))
23
24 self.outs.selectSection('code')
25 for f in ircode.Functions:
26 self.emit(ALabel(f.name))
27 self.emit(arm.push_ins(arm.RegisterSet({arm.r2, arm.r3,arm.lr})))
28 for bb in f.BasicBlocks:
29 self.emit(ALabel(bb.name))
30 for ins in bb.Instructions:
31 self.generateInstruction(ins)
32
33 def generateInstruction(self, ins):
34 if type(ins) is ir.Branch:
35 self.emit(arm.jmp_ins(ins.target))
36 elif type(ins) is ir.ImmLoad and ins.value < 255:
37 self.emit(arm.mov_ins(arm.r0, arm.Imm8(ins.value)))
38 elif type(ins) is ir.Store:
39 print(ins)
40 elif type(ins) is ir.Return:
41 self.emit(arm.pop_ins(arm.RegisterSet({arm.r2, arm.r3, arm.pc})))
42 elif type(ins) is ir.Load:
43 print(ins)
44 elif type(ins) is ir.BinaryOperator:
45 print(ins)
46 else:
47 print(ins)
48 raise CompilerError('IR "{}" not covered'.format(ins))
49
50