1/// An internal macro to invoke an assembly routine.
2///
3/// Depending on whether the unstable `inline-asm` feature is enabled, this will either call into
4/// the inline assembly implementation directly, or through the FFI shim (see `asm/lib.rs`).
5macro_rules! call_asm {
6 ( $func:ident ( $($args:ident: $tys:ty),* ) $(-> $ret:ty)? ) => {{
7 #[allow(unused_unsafe)]
8 unsafe {
9 match () {
10 #[cfg(feature = "inline-asm")]
11 () => crate::asm::inline::$func($($args),*),
12
13 #[cfg(not(feature = "inline-asm"))]
14 () => {
15 extern "C" {
16 fn $func($($args: $tys),*) $(-> $ret)?;
17 }
18
19 $func($($args),*)
20 },
21 }
22 }
23 }};
24}
25