tests/ui/asm/aarch64/const.rs

   1 // only-aarch64
   2 // run-pass
   3 // needs-asm-support
   4 // revisions: mirunsafeck thirunsafeck
   5 // [thirunsafeck]compile-flags: -Z thir-unsafeck
   6
   7 #![feature(asm_const)]
   8
   9 use std::arch::{asm, global_asm};
  10
  11 fn const_generic<const X: usize>() -> usize {
  12     unsafe {
  13         let a: usize;
  14         asm!("mov {}, {}", out(reg) a, const X);
  15         a
  16     }
  17 }
  18
  19 const fn constfn(x: usize) -> usize {
  20     x
  21 }
  22
  23 fn main() {
  24     unsafe {
  25         let a: usize;
  26         asm!("mov {}, {}", out(reg) a, const 5);
  27         assert_eq!(a, 5);
  28
  29         let b: usize;
  30         asm!("mov {}, {}", out(reg) b, const constfn(5));
  31         assert_eq!(b, 5);
  32
  33         let c: usize;
  34         asm!("mov {}, {}", out(reg) c, const constfn(5) + constfn(5));
  35         assert_eq!(c, 10);
  36     }
  37
  38     let d = const_generic::<5>();
  39     assert_eq!(d, 5);
  40 }
  41
  42 global_asm!("mov x0, {}", const 5);
  43 global_asm!("mov x0, {}", const constfn(5));
  44 global_asm!("mov x0, {}", const constfn(5) + constfn(5));