diff options
Diffstat (limited to 'Registers.py')
| -rw-r--r-- | Registers.py | 5 |
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]: |