1 files changed, 11 insertions, 0 deletions
diff --git a/Registers.py b/Registers.py
index 1d080f1..7fac4dd 100644
--- a/Registers.py
+++ b/Registers.py
@@ -70,6 +70,17 @@ class Registers(object):
                 raise RuntimeError("free() of unused register")
         else:
             raise RuntimeError("free() of invalid register")
+    def next_free(self, use_register=None):
+        """Mark use_register as in use, find the next free register and then
+        free both.
+        """
+        if use_register:
+            self.alloc(use_register)
+        next_avail = self.alloc()
+        self.free(next_avail)
+        if use_register:
+            self.free(use_register)
+        return next_avail
     def get_register(self, text):
         """Retrieve the first register from a binary instruction"""
         text = text.strip()