added prefetch operand

osaca/parser/prefetch.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+from osaca.parser.operand import Operand
+
+
+class PrefetchOperand(Operand):
+    def __init__(self, type_id=None, target=None, policy=None):
+        self._type_id = type_id
+        self._target = target
+        self._policy = policy
+
+    @property
+    def type_id(self):
+        return self._type_id
+
+    @type_id.setter
+    def type_id(self, type_id):
+        self._type_id = type_id
+
+    @property
+    def target(self):
+        return self._target
+
+    @target.setter
+    def target(self, target):
+        self._target = target
+
+    @property
+    def policy(self):
+        return self._policy
+
+    @policy.setter
+    def policy(self, policy):
+        self._policy = policy
+
+    def __str__(self):
+        return f"Label(type_id={self._type_id},target={self._target},policy={self._policy})"
+
+    def __repr__(self):
+        return self.__str__()