def _tf(lref, rref):
if isinstance(lref.typ, low_ir.UIntType) and isinstance(
rref.typ, low_ir.UIntType):
return [lref, rref], low_ir.UIntType(low_ir.IntWidth(1))
elif isinstance(lref.typ, low_ir.SIntType) and isinstance(
rref.typ, low_ir.SIntType):
return [lref, rref], low_ir.SIntType(low_ir.IntWidth(1))
else:
raise Exception("need uint types or sint types")
def _shrtf(lref, n):
if isinstance(lref.typ, low_ir.UIntType):
return [lref], low_ir.UIntType(
_pickWidth(lref.typ.width, low_ir.IntWidth(n),
lambda x, y: x - y))
elif isinstance(lref.typ, low_ir.SIntType):
return [lref], low_ir.SIntType(
_pickWidth(lref.typ.width, low_ir.IntWidth(n),
lambda x, y: x - y))
else:
raise Exception("need uint type or sint type")
def _pickWidth(l, r, func):
if l.width is None:
return r
elif r.width is None:
return l
else:
return low_ir.IntWidth(func(l.width, r.width))
def _lowWidth(width: Optional[int] = None):
return low_ir.IntWidth(width) if width is not None else None
def getReset(self):
return low_ir.Reference("reset", low_ir.UIntType(low_ir.IntWidth(1)))