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back.pysim: support async reset.

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This commit is contained in:
whitequark 2019-01-26 18:07:43 +00:00
parent 8686e9aa06
commit e74dbc3377
1 changed files with 15 additions and 4 deletions
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19
nmigen/back/pysim.py
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@ -550,10 +550,21 @@ class Simulator:
self._domain_signals[domain] |= signals_bits
statements = []
for signal in fragment.iter_comb():
statements.append(signal.eq(signal.reset))
for domain, signal in fragment.iter_sync():
statements.append(signal.eq(signal))
for domain, signals in fragment.drivers.items():
reset_stmts = []
hold_stmts = []
for signal in signals:
reset_stmts.append(signal.eq(signal.reset))
hold_stmts .append(signal.eq(signal))
if domain is None:
statements += reset_stmts
else:
if self._domains[domain].async_reset:
statements.append(Switch(self._domains[domain].rst,
{0: hold_stmts, 1: reset_stmts}))
else:
statements += hold_stmts
statements += fragment.statements
compiler = _StatementCompiler(self._signal_slots)