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1 | //! Run-time feature detection on ARM Aarch32. |
2 | ||
3 | /// Checks if `arm` feature is enabled. | |
4 | #[macro_export] | |
5 | #[unstable(feature = "stdsimd", issue = "27731")] | |
6 | #[allow_internal_unstable(stdsimd_internal,stdsimd)] | |
7 | macro_rules! is_arm_feature_detected { | |
8 | ("neon") => { | |
9 | cfg!(target_feature = "neon") || | |
10 | $crate::detect::check_for($crate::detect::Feature::neon) | |
11 | }; | |
12 | ("pmull") => { | |
13 | cfg!(target_feature = "pmull") || | |
14 | $crate::detect::check_for($crate::detect::Feature::pmull) | |
15 | }; | |
16 | ("v7") => { compile_error!("\"v7\" feature cannot be detected at run-time") }; | |
17 | ("vfp2") => { compile_error!("\"vfp2\" feature cannot be detected at run-time") }; | |
18 | ("vfp3") => { compile_error!("\"vfp3\" feature cannot be detected at run-time") }; | |
19 | ("vfp4") => { compile_error!("\"vfp4\" feature cannot be detected at run-time") }; | |
20 | ($t:tt,) => { | |
21 | is_arm_feature_detected!($t); | |
22 | }; | |
23 | ($t:tt) => { compile_error!(concat!("unknown arm target feature: ", $t)) }; | |
24 | } | |
25 | ||
26 | /// ARM CPU Feature enum. Each variant denotes a position in a bitset for a | |
27 | /// particular feature. | |
28 | /// | |
29 | /// PLEASE: do not use this, it is an implementation detail subject to change. | |
30 | #[doc(hidden)] | |
31 | #[allow(non_camel_case_types)] | |
32 | #[repr(u8)] | |
33 | #[unstable(feature = "stdsimd_internal", issue = "0")] | |
34 | pub enum Feature { | |
35 | /// ARM Advanced SIMD (NEON) - Aarch32 | |
36 | neon, | |
37 | /// Polynomial Multiply | |
38 | pmull, | |
39 | } |