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Make @property psw use pswfields/dict methods

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outofmbufs 2025-04-09 22:16:56 -05:00
parent 5df044e44c
commit 0f32d9fca9
1 changed files with 8 additions and 22 deletions
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30
machine.py
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@ -921,28 +921,14 @@ class PDP1170(PDP11):
@property @property
def psw(self): def psw(self):
# NOTE: to simplify/accelerate condition code handling during pswd = {attr: getattr(self, 'psw_' + attr)
# instructions, the NZVC bits are broken out into individual for attr in self._pswfields}
# attributes, and are stored as truthy/falsey not necessarily # the various 1-bit attributes are stored as "truthy/falsy"
# 1/0 or True/False. # in the psw_foo attributes but need to be normalized to 1/0 here
for a, v in pswd.items():
# so, to reconstitute NZVC bits ... if self._pswfields[a][1] == 1:
NZVC = 0 pswd[a] = bool(v)
if self.psw_n: return self._dict2psw(pswd)
NZVC |= 0o10
if self.psw_z:
NZVC |= 0o04
if self.psw_v:
NZVC |= 0o02
if self.psw_c:
NZVC |= 0o01
return (((self.psw_curmode & 3) << 14) |
((self.psw_prevmode & 3) << 12) |
((self.psw_regset & 1) << 11) |
((self.psw_pri & 7) << 5) |
((self.psw_trap & 1) << 4) |
NZVC)
# Write the ENTIRE processor word, without any privilege enforcement. # Write the ENTIRE processor word, without any privilege enforcement.
# The lack of privilege enforcement is necessary because, e.g., that's # The lack of privilege enforcement is necessary because, e.g., that's