|  | //! Run-time feature detection on ARM Aarch32. | 
|  |  | 
|  | features! { | 
|  | @TARGET: arm; | 
|  | @MACRO_NAME: is_arm_feature_detected; | 
|  | @MACRO_ATTRS: | 
|  | /// Checks if `arm` feature is enabled. | 
|  | #[unstable(feature = "stdsimd", issue = "27731")] | 
|  | @NO_RUNTIME_DETECTION: "v7"; | 
|  | @NO_RUNTIME_DETECTION: "vfp2"; | 
|  | @NO_RUNTIME_DETECTION: "vfp3"; | 
|  | @NO_RUNTIME_DETECTION: "vfp4"; | 
|  | @FEATURE: #[unstable(feature = "stdsimd", issue = "27731")] neon: "neon"; | 
|  | /// ARM Advanced SIMD (NEON) - Aarch32 | 
|  | @FEATURE: #[unstable(feature = "stdsimd", issue = "27731")] pmull: "pmull"; | 
|  | /// Polynomial Multiply | 
|  | @FEATURE: #[unstable(feature = "stdsimd", issue = "27731")] crc: "crc"; | 
|  | /// CRC32 (Cyclic Redundancy Check) | 
|  | @FEATURE: #[unstable(feature = "stdsimd", issue = "27731")] crypto: "crypto"; | 
|  | /// Crypto: AES + PMULL + SHA1 + SHA2 | 
|  | } |