class Op(object): __slots__ = ["name"] def __init__(self, name): self.name = name def __str__(self): return self.name def __repr__(self): return """""" % self Op.ADD = Op("ADD") # x = x + y Op.SUB = Op("SUB") # x = x - y Op.MUL = Op("MUL") # x = x * y Op.DIV = Op("DIV") # x = x / y Op.MOD = Op("MOD") # x = x % y Op.AND = Op("AND") # x = x AND y Op.OR = Op("OR") # x = x OR y Op.NOT = Op("NOT") # x = !x Op.MINUS = Op("MINUS") # x = -x Op.STORE = Op("STORE") # MEM[x] = y Op.LOAD = Op("LOAD") # y = MEM[x] Op.MOV = Op("MOV") # x = y Op.CMP = Op("CMP") # Z = x == y, N = x < y Op.EQ = Op("EQ") # x = Z Op.NE = Op("NE") # x = !Z Op.LT = Op("LT") # x = N Op.LE = Op("LE") # x = Z || N Op.GE = Op("GE") # x = !N Op.GT = Op("GT") # x = !Z && !N Op.BEQ = Op("BEQ") # if x goto y Op.JMP = Op("JMP") # goto x Op.PARAM = Op("PARAM") # param x Op.CALL = Op("CALL") # call x return in y Op.RETURN = Op("RETURN") # return x class TAC(object): def __init__(self,op,arg1=None,arg2=None): self.op = op self.arg1 = arg1 self.arg2 = arg2 def __repr__(self): if self.arg2: return "" % (self.op,self.arg1,self.arg2) return "" % (self.op,self.arg1) class Label(object): def __init__(self, name): self.name = name def __repr__(self): return "" % self.name class FunctionLabel(Label): def __repr__(self): return "" % self.name class TACList(object): __shared_state = {} __tac_list = [] def __init__(self): self.__dict__ = self.__shared_state def add(self, tac): self.__tac_list.append(tac) def __repr__(self): res = "" for i in range(len(self.__tac_list)): res += "%04d: %s\n" % (i, repr(self.__tac_list[i])) return res