execute multiple inline assembly instructions with a single asm!{} invocation!

multi-line_asm.rs

#![feature(asm)]

fn calc() -> usize {
    let mut a: usize = 0;
    unsafe {
        asm!(/* Instructions:   for(i=10; 0<i; i--){ a+=i } */
            "mov rcx, 10\n\t"   /* rcx = 10 - i - counter   */
            "xor rax, rax\n\t"  /* rax = 0 - a - storage    */
            "loop:\n\t"         /* label                    */
            "add rax, rcx\n\t"  /* rax+=rcx                 */
            "dec rcx\n\t"       /* rcx--                    */
            "jnz loop"          /* rcx!=0 -> loop           */
            : "={rax}"(a)       /* output rax->a            */
            :                   /* no input                 */
            : "rax", "rcx"      /* clobbers rax & rcx       */
            : "intel"           /* att is bad mmmk          */
        );
    }
    a
}
fn main() {
    println!{"result is: {}", calc()};
}