Stabilizing naked functions

// This program demonstrates a stable naked function in Rust 1.98.1 (edition 2024).
// It prints the result of adding two numbers using hand‑written assembly.

#![allow(dead_code)]

#[unsafe(naked)]
pub extern "sysv64" fn add(a: u64, b: u64) -> u64 {
    // The assembly loads the arguments from the SysV registers rdi and rsi,
    // adds them, and returns the result in rax.
    core::arch::naked_asm!(
        "lea rax, [rdi + rsi]",
        "ret"
    );
}

fn main() {
    // Call the naked function like any other Rust function.
    let result = unsafe { add(10, 32) };
    println!("10 + 32 = {}", result);
}