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comparison python/target/arminstructionselector.py @ 322:44f336460c2a

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Half of use of burg spec for arm
author Windel Bouwman
date Mon, 27 Jan 2014 19:58:07 +0100
parents e84047f29c78
children e9fe6988497c
comparison
equal deleted inserted replaced
321:8c569fbe60e4 322:44f336460c2a
1 import os
1 from ppci import ir 2 from ppci import ir
2 from ppci.irmach import AbstractInstruction as makeIns 3 from ppci.irmach import AbstractInstruction as makeIns
4 from ppci.ir2tree import makeTree
5 import pyburg
3 from .basetarget import Label, Comment, Alignment, LabelRef, DebugInfo, Nop 6 from .basetarget import Label, Comment, Alignment, LabelRef, DebugInfo, Nop
4 from .instructionselector import InstructionSelector 7 from .instructionselector import InstructionSelector
5 from .arminstructions import Orr, Lsl, Str2, Ldr2, Ldr3 8 from .arminstructions import Orr, Lsl, Str2, Ldr2, Ldr3
6 from .arminstructions import B, Bl, Bgt, Blt, Beq, Bne 9 from .arminstructions import B, Bl, Bgt, Blt, Beq, Bne
7 from .arminstructions import Mov2, Mov3 10 from .arminstructions import Mov2, Mov3
8 from .arminstructions import Add, Sub, Cmp, Sub2, Add2, Mul 11 from .arminstructions import Add, Sub, Cmp, Sub2, Add2, Mul
9 from .basetarget import Imm8, Imm7, Imm3 12 from .basetarget import Imm8, Imm7, Imm3
10 13
14 # Import BURG spec for arm:
15 spec_file = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'arm.brg')
16 arm_matcher = pyburg.load_as_module(spec_file)
17
18 class ArmMatcher(arm_matcher.Matcher):
19 def __init__(self):
20 super().__init__()
21
22 def newTmp(self):
23 pass
24
25 def emit(self, *args, **kwargs):
26 pass
27
11 28
12 class ArmInstructionSelector(InstructionSelector): 29 class ArmInstructionSelector(InstructionSelector):
13 """ Instruction selector for the arm architecture """ 30 """ Instruction selector for the arm architecture """
31 def __init__(self):
32 super().__init__()
33 self.matcher = ArmMatcher()
34
14 def munchExpr(self, e): 35 def munchExpr(self, e):
36 #t = makeTree(e)
37 #print(t)
38 #return self.matcher.gen(t)
39
40 # TODO: below is obsolete:
15 if isinstance(e, ir.Binop) and e.operation == '+' and \ 41 if isinstance(e, ir.Binop) and e.operation == '+' and \
16 isinstance(e.b, ir.Const) and e.b.value < 8: 42 isinstance(e.b, ir.Const) and e.b.value < 8:
17 a = self.munchExpr(e.a) 43 a = self.munchExpr(e.a)
18 d = self.newTmp() 44 d = self.newTmp()
19 c = Imm3(e.b.value) 45 c = Imm3(e.b.value)