Hexagon (target/hexagon) Add is_old/is_new to Register class

Signed-off-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Brian Cain <bcain@quicinc.com>
Message-Id: <20240307032327.4799-2-ltaylorsimpson@gmail.com>
Signed-off-by: Brian Cain <bcain@quicinc.com>

target/hexagon/hex_common.py

@@ -428,10 +428,18 @@ class Source:
 class OldSource(Source):
     def reg_tcg(self):
         return f"{self.regtype}{self.regid}V"
+    def is_old(self):
+        return True
+    def is_new(self):
+        return False
 
 class NewSource(Source):
     def reg_tcg(self):
         return f"{self.regtype}{self.regid}N"
+    def is_old(self):
+        return False
+    def is_new(self):
+        return True
 
 class ReadWrite:
     def reg_tcg(self):
@@ -444,6 +452,10 @@ class ReadWrite:
         return True
     def is_readwrite(self):
         return True
+    def is_old(self):
+        return True
+    def is_new(self):
+        return False
 
 class GprDest(Register, Single, Dest):
     def decl_tcg(self, f, tag, regno):