WIP for func parameter support and local (automatic) variables

1 files changed, 4 insertions, 1 deletions

diff --git a/Registers.py b/Registers.py
index 2a070d4..1d080f1 100644
--- a/Registers.py
+++ b/Registers.py
@@ -31,6 +31,9 @@ class Registers(object):
         self.registers = {}
         for reg in range(0, 8):
             self.registers[str(reg)] = False
+        # the "Base Pointer", local variables are relative to this address. The
+        # value of this register points to a location in the stack
+        self.BP = "R5"
     def alloc(self, register=None):
         """Retrieves a register which is marked unused, marks it as in use and
         return it"""
@@ -42,7 +45,7 @@ class Registers(object):
             if self.registers[register]:
                 raise RuntimeError("Register 'R{}' is already in use".format(register))
         else:
-            for register in range(0, 6):
+            for register in range(0, 5):
                 register = str(register)
                 # find a free register
                 if not self.registers[register]: