def testLabels():
p = Parser.Program()
p.AddLabel("loop")
p.AddOperation(Assembler.AddressInstruction(56))
assert(p.table.HasSymbol("loop"))
assert(p.table.GetSymbolValue("loop") == 0)
p.AddOperation(Assembler.AddressInstruction("loop"))
p.ReplaceSymbols()
text = p.ToBinary()
print(text)
def Parse(self, line):
self.newAddress = None
self.newTarget = None
self.newCommand = None
self.newJump = None
self.newLabel = None
parsed = self.oneline.parseString(line)
if self.newAddress is not None:
result = Assembler.AddressInstruction(self.newAddress)
return result
elif self.newCommand is not None:
#print(self.newCommand.Expression)
if self.newTarget is None:
self.newTarget = Assembler.DestinationBits()
if self.newJump is None:
self.newJump = Assembler.JumpBits()
result = Assembler.ControlInstruction(self.newCommand,
self.newTarget, self.newJump)
return result
elif self.newTarget is not None:
cmd = self.newTarget.ToPlainStr()
self.newCommand = Assembler.InstructionBits(cmd)
self.newTarget = Assembler.DestinationBits()
if self.newJump is None:
self.newJump = Assembler.JumpBits()
result = Assembler.ControlInstruction(self.newCommand,
self.newTarget, self.newJump)
elif self.newLabel is not None:
result = self.newLabel
return result
else:
return None
