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1 #!/usr/bin/python
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2
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3 import unittest
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4 import ppci
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5 from asm import AInstruction, ABinop, AUnop, ASymbol, ALabel, ANumber, tokenize, Assembler
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6
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7 class AssemblerLexingCase(unittest.TestCase):
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8 """ Tests the assemblers lexer """
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9
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10 def testLex0(self):
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11 """ Check if the lexer is OK """
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12 asmline, toks = 'mov rax, rbx ', ['ID', 'ID', ',', 'ID']
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13 self.assertSequenceEqual([tok.typ for tok in tokenize(asmline)], toks)
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14
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15 def testLex1(self):
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16 """ Test if lexer correctly maps some tokens """
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17 asmline, toks = 'lab1: mov rax, rbx ', ['ID', ':', 'ID', 'ID', ',', 'ID']
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18 self.assertSequenceEqual([tok.typ for tok in tokenize(asmline)], toks)
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19
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20 def testLex1(self):
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21 """ Test if lexer correctly maps some tokens """
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22 asmline, toks = 'mov 3.13 0xC 13', ['ID', 'REAL', 'NUMBER', 'NUMBER']
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23 self.assertSequenceEqual([tok.typ for tok in tokenize(asmline)], toks)
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24
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25 def testLex2(self):
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26 """ Test if lexer fails on a token that is invalid """
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27 asmline = '0z4: mov rax, rbx $ '
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28 with self.assertRaises(ppci.CompilerError):
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29 list(tokenize(asmline))
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30
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31 class AssemblerParsingTestCase(unittest.TestCase):
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32 """
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33 Tests the assembler parts
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34 """
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35
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36 def testParse(self):
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37 asmline = 'lab1: mov rax, rbx'
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38 a = Assembler()
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39 a.parse_line(asmline)
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40
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41 def testParse2(self):
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42 asmline = 'a: mov rax, [rbx + 2]'
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43 a = Assembler()
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44 a.parse_line(asmline)
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45 output = []
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46 output.append(ALabel('a'))
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47 output.append(AInstruction('mov', [ASymbol('rax'), AUnop('[]', ASymbol('rbx') + ANumber(2))]))
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48 self.assertSequenceEqual(output, a.output)
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49
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50 def testParse3(self):
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51 # A label must be optional:
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52 asmline = 'mov rax, 1'
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53 a = Assembler()
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54 a.parse_line(asmline)
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55 output = []
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56 output.append(AInstruction('mov', [ASymbol('rax'), ANumber(1)]))
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57 self.assertSequenceEqual(output, a.output)
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58
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59 def testParse4(self):
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60 # Test 3 operands:
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61 asmline = 'add rax, [4*rbx + 22], rcx'
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62 a = Assembler()
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63 a.parse_line(asmline)
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64 output = []
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65 ops = []
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66 ops.append(ASymbol('rax'))
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67 ops.append(AUnop('[]', ANumber(4) * ASymbol('rbx') + ANumber(22)))
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68 ops.append(ASymbol('rcx'))
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69 output.append(AInstruction('add', ops))
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70 self.assertSequenceEqual(output, a.output)
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71
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72 def testParse5(self):
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73 # An instruction must be optional:
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74 asmline = 'lab1:'
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75 a = Assembler()
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76 a.parse_line(asmline)
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77 output = []
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78 output.append(ALabel('lab1'))
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79 self.assertSequenceEqual(output, a.output)
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80
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81 def testParse6(self):
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82 # A line can be empty
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83 a = Assembler()
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84 a.parse_line('')
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85
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86 class AssemblerOtherTestCase(unittest.TestCase):
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87 def testX86(self):
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88 testsrc = """ ; tst
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89 begin:
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90 mov rax, rbx ; 0x48, 0x89, 0xd8
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91 xor rcx, rbx ; 0x48, 0x31, 0xd9
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92 inc rcx ; 0x48 0xff 0xc1
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93 """
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94 a = Assembler()
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95 a.assemble(testsrc)
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96 # Compare with nasm output:
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97 nasmbytes = [0x48, 0x89, 0xd8, 0x48, 0x31, 0xd9, 0x48, 0xff, 0xc1]
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98
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99 if __name__ == '__main__':
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100 unittest.main()
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