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196 | @irdl_op_definition
class VarithSwitchOp(IRDLOperation):
"""
Variadic selection operation
Similar to `cf.switch`, this operation returns the argument corresponding to
`flag`, returning the default value otherwise.
"""
name = "varith.switch"
T: ClassVar = VarConstraint("T", AnyAttr())
flag = operand_def(IntegerType | IndexType)
case_values = prop_def(DenseIntElementsAttr)
default_arg = operand_def(T)
args = var_operand_def(T)
result = result_def(T)
traits = traits_def(Pure())
def __init__(
self,
flag: SSAValue | Operation,
case_values: DenseIntElementsAttr,
default_arg: SSAValue | Operation,
*args: SSAValue | Operation,
attr_dict: dict[str, Attribute] | None = None,
):
super().__init__(
operands=[
flag,
default_arg,
args,
],
properties={
"case_values": case_values,
},
attributes=attr_dict,
result_types=(SSAValue.get(default_arg).type,),
)
@classmethod
def parse(cls, parser: Parser) -> Self:
unresolved_flag = parser.parse_unresolved_operand()
parser.parse_punctuation(":")
flag_type = parser.parse_type()
assert isa(flag_type, IntegerType | IndexType)
flag = parser.resolve_operand(unresolved_flag, flag_type)
parser.parse_punctuation("->")
return_type = parser.parse_type()
parser.parse_punctuation(",")
parser.parse_punctuation("[")
parser.parse_keyword("default")
parser.parse_punctuation(":")
default_arg = parser.resolve_operand(
parser.parse_unresolved_operand(), return_type
)
values: list[int] = []
args: list[SSAValue] = []
while parser.parse_optional_punctuation(","):
values.append(parser.parse_integer())
parser.parse_punctuation(":")
args.append(
parser.resolve_operand(parser.parse_unresolved_operand(), return_type)
)
parser.parse_punctuation("]")
attr_dict = parser.parse_optional_attr_dict()
case_values = DenseIntElementsAttr.from_list(
VectorType(flag_type, (len(values),)), values
)
return cls(
flag,
case_values,
default_arg,
*args,
attr_dict=attr_dict,
)
@staticmethod
def _print_case(printer: Printer, case_name: str, arg: SSAValue):
printer.print_string(case_name)
printer.print_string(": ")
printer.print_operand(arg)
def print(self, printer: Printer):
printer.print_string(" ")
printer.print_operand(self.flag)
printer.print_string(" : ")
printer.print_attribute(self.flag.type)
printer.print_string(" -> ")
printer.print_attribute(self.result.type)
printer.print_string(", [")
with printer.indented():
printer.print_string("\n")
cases = [("default", self.default_arg)] + [
(str(c), arg)
for (c, arg) in zip(
self.case_values.get_values(),
self.args,
strict=True,
)
]
printer.print_list(
cases, lambda x: self._print_case(printer, x[0], x[1]), ",\n"
)
printer.print_string("\n]")
if self.attributes:
printer.print_attr_dict(self.attributes)
|