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comparison python/ppci/target/arm/frame.py @ 353:b8ad45b3a573

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Started with strings
author Windel Bouwman
date Sun, 09 Mar 2014 18:49:10 +0100
parents 3bb7dcfe5529
children 5477e499b039
comparison
equal deleted inserted replaced
352:899ae3aea803 353:b8ad45b3a573
1 from ... import ir 1 from ... import ir
2 from ..basetarget import Label, Alignment 2 from ..basetarget import Label, Alignment
3 from ...irmach import AbstractInstruction, Frame 3 from ...irmach import AbstractInstruction, Frame
4 from .instructions import Dcd, Add, Sub, Push, Pop, Mov 4 from .instructions import Dcd, Add, Sub, Push, Pop, Mov, Db
5 from .registers import R0, R1, R2, R3, R4, R5, R6, R7, R8, R11, LR, PC, SP 5 from .registers import R0, R1, R2, R3, R4, R5, R6, R7, R8, R11, LR, PC, SP
6 6
7 7
8 class ArmFrame(Frame): 8 class ArmFrame(Frame):
9 """ Arm specific frame for functions. """ 9 """ Arm specific frame for functions. """
49 if lvar not in self.locVars: 49 if lvar not in self.locVars:
50 self.locVars[lvar] = self.stacksize 50 self.locVars[lvar] = self.stacksize
51 self.stacksize = self.stacksize + 4 51 self.stacksize = self.stacksize + 4
52 return self.locVars[lvar] 52 return self.locVars[lvar]
53 53
54 def addConstant(self, value): 54 def add_constant(self, value):
55 lab_name = '{}_literal_{}'.format(self.name, len(self.constants)) 55 lab_name = '{}_literal_{}'.format(self.name, len(self.constants))
56 self.constants.append((lab_name, value)) 56 self.constants.append((lab_name, value))
57 return lab_name 57 return lab_name
58 58
59 def prologue(self): 59 def prologue(self):
76 post.append(Add(SP, SP, self.stacksize)) 76 post.append(Add(SP, SP, self.stacksize))
77 post += [ 77 post += [
78 Pop({PC, R11}), 78 Pop({PC, R11}),
79 Alignment(4) # Align at 4 bytes 79 Alignment(4) # Align at 4 bytes
80 ] 80 ]
81
81 # Add constant literals: 82 # Add constant literals:
82 for ln, v in self.constants: 83 for ln, v in self.constants:
83 post.extend([Label(ln), Dcd(v)]) 84 if isinstance(v, int):
85 post.extend([Label(ln), Dcd(v)])
86 elif isinstance(v, str):
87 post.extend([Label(ln), Dcd(len(v))])
88 for c in v:
89 post.append(Db(ord(c)))
90 post.append(Alignment(4)) # Align at 4 bytes
91 else:
92 raise Exception()
84 return post 93 return post
85 94
86 def EntryExitGlue3(self): 95 def EntryExitGlue3(self):
87 """ 96 """
88 Add code for the prologue and the epilogue. Add a label, the 97 Add code for the prologue and the epilogue. Add a label, the