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comparison python/asm.py @ 198:33d50727a23c

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Fixup testscript
author Windel Bouwman
date Sat, 01 Jun 2013 13:11:22 +0200
parents 4a1ca1271241
children a690473b79e2
comparison
equal deleted inserted replaced
197:4a1ca1271241 198:33d50727a23c
1 import re 1 import re, sys, argparse
2 import pyyacc 2 import pyyacc
3 from ppci import Token, CompilerError, SourceLocation 3 from ppci import Token, CompilerError, SourceLocation
4 import sys, argparse 4
5
6
7 # Different instruction sets:
8 class InstructionSet:
9 pass
10
11 class X86(InstructionSet):
12 pass
13 5
14 # Generic assembler: 6 # Generic assembler:
15 keywords = ['global', 'db'] 7 keywords = ['global', 'db']
16 8
17 def tokenize(s): 9 def tokenize(s):
26 ('HEXNUMBER', r'0x[\da-fA-F]+'), 18 ('HEXNUMBER', r'0x[\da-fA-F]+'),
27 ('NUMBER', r'\d+'), 19 ('NUMBER', r'\d+'),
28 ('ID', r'[A-Za-z][A-Za-z\d_]*'), 20 ('ID', r'[A-Za-z][A-Za-z\d_]*'),
29 ('SKIP', r'[ \t]'), 21 ('SKIP', r'[ \t]'),
30 ('LEESTEKEN', r':=|[\.,=:\-+*\[\]/\(\)]|>=|<=|<>|>|<'), 22 ('LEESTEKEN', r':=|[\.,=:\-+*\[\]/\(\)]|>=|<=|<>|>|<'),
31 ('STRING', r"'.*?'") 23 ('STRING', r"'.*?'"),
24 ('COMMENT', r";.*")
32 ] 25 ]
33 tok_re = '|'.join('(?P<%s>%s)' % pair for pair in tok_spec) 26 tok_re = '|'.join('(?P<%s>%s)' % pair for pair in tok_spec)
34 gettok = re.compile(tok_re).match 27 gettok = re.compile(tok_re).match
35 line = 1 28 line = 1
36 pos = line_start = 0 29 pos = line_start = 0
136 class Assembler: 129 class Assembler:
137 def __init__(self): 130 def __init__(self):
138 self.output = [] 131 self.output = []
139 # Construct a parser given a grammar: 132 # Construct a parser given a grammar:
140 ident = lambda x: x # Identity helper function 133 ident = lambda x: x # Identity helper function
141 g = pyyacc.Grammar(['ID', 'NUMBER', ',', '[', ']', ':', '+', '-', '*', pyyacc.EPS]) 134 g = pyyacc.Grammar(['ID', 'NUMBER', ',', '[', ']', ':', '+', '-', '*', pyyacc.EPS, 'COMMENT'])
142 g.add_production('asmline', ['label', 'instruction']) 135 g.add_production('asmline', ['asmline2'])
143 g.add_production('asmline', ['instruction']) 136 g.add_production('asmline', ['asmline2', 'COMMENT'])
144 g.add_production('asmline', ['label']) 137 g.add_production('asmline2', ['label', 'instruction'])
145 g.add_production('asmline', []) 138 g.add_production('asmline2', ['instruction'])
139 g.add_production('asmline2', ['label'])
140 g.add_production('asmline2', [])
141 g.add_production('optcomment', [])
142 g.add_production('optcomment', ['COMMENT'])
146 g.add_production('label', ['ID', ':'], self.p_label) 143 g.add_production('label', ['ID', ':'], self.p_label)
147 g.add_production('instruction', ['opcode', 'operands'], self.p_ins_1) 144 g.add_production('instruction', ['opcode', 'operands'], self.p_ins_1)
148 g.add_production('instruction', ['opcode'], self.p_ins_2) 145 g.add_production('instruction', ['opcode'], self.p_ins_2)
149 g.add_production('opcode', ['ID'], ident) 146 g.add_production('opcode', ['ID'], ident)
150 g.add_production('operands', ['operand'], self.p_operands_1) 147 g.add_production('operands', ['operand'], self.p_operands_1)
216 Do not take newlines into account 213 Do not take newlines into account
217 """ 214 """
218 self.parse_line(line) 215 self.parse_line(line)
219 self.assemble_aast() 216 self.assemble_aast()
220 217
221 def assemble_aast(self, at): 218 def assemble_aast(self):
222 """ Assemble a parsed asm line """ 219 """ Assemble a parsed asm line """
223 pass 220 pass
224 221
225 def back_patch(self): 222 def back_patch(self):
226 """ Fix references to earlier labels """ 223 """ Fix references to earlier labels """