Mercurial > repos > blastem
changeset 2452:8b3daed1c076
Allow more if statements to be constant folded in CPU DSL
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 19 Feb 2024 18:14:12 -0800 |
| parents | edd73a009537 |
| children | 7d7525769ce2 |
| files | cpu_dsl.py |
| diffstat | 1 files changed, 12 insertions(+), 0 deletions(-) [+] |
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--- a/cpu_dsl.py Mon Feb 19 17:55:45 2024 -0800 +++ b/cpu_dsl.py Mon Feb 19 18:14:12 2024 -0800 @@ -1151,6 +1151,11 @@ '!=': _neqCImpl } } +_ifCmpEval = { + '>=U': lambda a, b: a >= b, + '=': lambda a, b: a == b, + '!=': lambda a, b: a != b +} #represents a DSL conditional construct class If(ChildBlock): def __init__(self, parent, cond): @@ -1214,6 +1219,13 @@ self._genConstParam(prog.checkBool(self.cond), prog, fieldVals, output, otype) else: if self.cond in _ifCmpImpl[otype]: + if prog.lastOp.op == 'cmp': + params = [prog.resolveParam(p, parent, fieldVals) for p in prog.lastOp.params] + if type(params[0]) is int and type(params[1]) is int: + output.pop() + res = _ifCmpEval[self.cond](params[1], params[0]) + self._genConstParam(res, prog, fieldVals, output, otype) + return oldCond = prog.conditional prog.conditional = True #temp = prog.temp.copy()