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comparison python/target/armframe.py @ 341:4d204f6f7d4e devel

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Rewrite of assembler parts
author Windel Bouwman
date Fri, 28 Feb 2014 18:07:14 +0100
parents e9fe6988497c
children
comparison
equal deleted inserted replaced
340:c7cc54c0dfdf 341:4d204f6f7d4e
1 from ppci import ir 1 from ppci import ir
2 from .basetarget import Label, Comment, Alignment, LabelRef, DebugInfo, Nop 2 from .basetarget import Label, Comment, Alignment, LabelRef, DebugInfo, Nop
3 from .basetarget import Imm7 3 from .basetarget import Imm7
4 from ppci.irmach import makeIns, Frame 4 from ppci.irmach import makeIns, Frame
5 from .arminstructions import Dcd, AddSp, SubSp, Push, Pop, Mov2 5 from .arminstructions import Dcd, AddSp, SubSp, Push, Pop, Mov2
6 from .arminstructions import R0, R1, R2, R3, R4, R5, R6, R7, LR, PC, SP 6 from .armregisters import R0, R1, R2, R3, R4, R5, R6, R7, LR, PC, SP
7 7
8 8
9 class ArmFrame(Frame): 9 class ArmFrame(Frame):
10 """ Arm specific frame for functions. """ 10 """ Arm specific frame for functions. """
11 def __init__(self, name): 11 def __init__(self, name):
62 pre = [ 62 pre = [
63 Label(self.name), # Label indication function 63 Label(self.name), # Label indication function
64 Push({LR, R7}) 64 Push({LR, R7})
65 ] 65 ]
66 if self.stacksize > 0: 66 if self.stacksize > 0:
67 pre.append(SubSp(SP, SP, Imm7(self.stacksize))) # Reserve stack space 67 pre.append(SubSp(self.stacksize)) # Reserve stack space
68 pre += [ 68 pre += [
69 Mov2(R7, SP) # Setup frame pointer 69 Mov2(R7, SP) # Setup frame pointer
70 ] 70 ]
71 return pre 71 return pre
72 72
73 def epilogue(self): 73 def epilogue(self):
74 """ Return epilogue sequence for a frame. Adjust frame pointer and add constant pool """ 74 """ Return epilogue sequence for a frame. Adjust frame pointer and add constant pool """
75 post = [] 75 post = []
76 if self.stacksize > 0: 76 if self.stacksize > 0:
77 post.append(AddSp(SP, SP, Imm7(self.stacksize))) 77 post.append(AddSp(self.stacksize))
78 post += [ 78 post += [
79 Pop({PC, R7}), 79 Pop({PC, R7}),
80 Alignment(4) # Align at 4 bytes 80 Alignment(4) # Align at 4 bytes
81 ] 81 ]
82 # Add constant literals: 82 # Add constant literals: