Macro std::arch::is_mips64_feature_detected

macro_rules! is_mips64_feature_detected {
    ("msa") => { ... };
    ($t:tt,) => { ... };
    ($t:tt) => { ... };
}

🔬This is a nightly-only experimental API. (stdarch_mips_feature_detection #111188)

Checks if mips64 feature is enabled.