ShInterruptOptions

    pub const ShInterruptOptions = struct {
        /// The boundary the stack is aligned to when the function is called.
        /// `null` means the default for this calling convention.
        incoming_stack_alignment: ?u64 = null,
        save: SaveBehavior = .full,

        pub const SaveBehavior = enum(u3) {
            /// Save only fpscr (if applicable).
            fpscr,
            /// Save only high-numbered registers, i.e. r0 through r7 are *not* saved.
            high,
            /// Save all registers normally.
            full,
            /// Save all registers using the CPU's fast register bank.
            bank,
        };
    }