class Op(object):
__slots__ = ["name"]
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
def __repr__(self):
return """<Operator: "%s">""" % 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.MOV = Op("MOV") # x = y
Op.STORE = Op("STORE") # MEM[x] = y
Op.LOAD = Op("LOAD") # y = MEM[x]
Op.PUSH = Op("PUSH") # push x
Op.POP = Op("POP") # pop x
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.BEZ = Op("BEZ") # if x == 0 goto y
Op.JMP = Op("JMP") # goto 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 "<TAC, op: %s, arg1: %s, arg2: %s>" % (self.op,self.arg1,self.arg2)
return "<TAC, op: %s, arg1: %s>" % (self.op,self.arg1)
class Label(object):
def __init__(self, name):
self.name = name
def __repr__(self):
return "<Label, name: %s>" % self.name
class FunctionPrologue(Label):
def __repr__(self):
return "<FunctionPrologue, name: %s>" % self.name
class FunctionEpilogue(Label):
def __repr__(self):
return "<FunctionEpilogue, name: %s>" % 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
def __iter__(self):
return self.__tac_list.__iter__()
