dialects: (arith) add missing sitofp and fptoui ops

[erick-xanadu]

Hello, I will try to contribute the following items to xDSL, but I've been a bit busy. I'll add them here in case I take too long and you folks would like to add it to the repository. I think I agree with the comment made by @superlopuh in Zulip that the interpreter should use typed values instead of python ones. I'll try to find some time to work on that as well.

@irdl.irdl_op_definition
class UIToFPOp(irdl.IRDLOperation):
    name = "arith.sitofp"

    input = irdl.operand_def(builtin.IntegerType)
    result = irdl.result_def(builtin.AnyFloatConstr)

    assembly_format = "$input attr-dict `:` type($input) `to` type($result)"

    traits = irdl.traits_def(traits.Pure())

    def __init__(self, op: ir.SSAValue | ir.Operation, target_type: builtin.AnyFloat):
        super().__init__(operands=[op], result_types=[target_type])

@irdl.irdl_op_definition
class FPToUIOp(irdl.IRDLOperation):
    name = "arith.fptoui"

    input = irdl.operand_def(builtin.AnyFloatConstr)
    result = irdl.result_def(builtin.IntegerType)

    assembly_format = "$input attr-dict `:` type($input) `to` type($result)"

    traits = irdl.traits_def(traits.Pure())

    def __init__(self, op: ir.SSAValue | ir.Operation, target_type: builtin.IntegerType):
        super().__init__(operands=[op], result_types=[target_type])

[superlopuh]

Fantastic, thank you! I look forward to your PRs :)

[compor]

I'm going to split this issue in two more, just to track this a bit better.